/*
 * calcular-online — "Fintech clean" design system (light + dark).
 *
 * Single theme source. Fonts and the Material Symbols icon class live in
 * fonts.css (loaded before this file). Rules:
 *   - every font-size is rem/%-based (html is 87.5%, so 1rem = 14px);
 *   - CSS logical properties everywhere, so ar_SA (RTL) mirrors for free;
 *   - the theme is driven by data-bs-theme="light|dark" on <html>.
 *
 * Sections: 1 tokens, 2 Bootstrap bridge, 3 base, 4 shell (topbar, categories menu,
 * search, drawer), 5 page anatomy, 6 home/hub, 7 footer, 8 consent, 9 error,
 * 10 Bootstrap components, 11 legacy/compat, 12 responsive + a11y + print.
 */

/* ==========================================================================
   1. Design tokens
   ========================================================================== */

:root {
    /* Shape, type and layout (theme independent). */
    --calc-radius: 0.625rem;
    --calc-radius-sm: 0.5rem;
    --calc-radius-lg: 1rem;
    --calc-radius-pill: 999px;

    --calc-font-sans: 'Inter Variable', system-ui, -apple-system, 'Segoe UI', Roboto, 'Noto Sans', 'Helvetica Neue', Arial, sans-serif;
    --calc-font-size-base: 1rem;
    --calc-font-size-sm: 0.875rem;
    --calc-font-size-lg: 1.125rem;
    --calc-line-height: 1.55;

    --calc-content-max-width: 1200px;
    --calc-topbar-height: 64px;

    /* Primary button keeps its blue in both themes so white text stays AA. */
    --calc-btn-bg: #2563eb;
    --calc-btn-bg-hover: #1d4ed8;
    --calc-btn-ink: #ffffff;
}

:root,
[data-bs-theme="light"] {
    color-scheme: light;

    --calc-bg: #f8fafc;
    --calc-surface: #ffffff;
    --calc-surface-alt: #f1f5f9;
    --calc-border: #e2e8f0;
    --calc-border-strong: #cbd5e1;
    --calc-text: #0f172a;
    --calc-text-muted: #64748b;
    --calc-text-secondary: #475569;

    --calc-primary: #2563eb;
    --calc-primary-rgb: 37, 99, 235;
    --calc-primary-hover: #1d4ed8;
    --calc-primary-soft: rgba(37, 99, 235, 0.08);
    --calc-primary-ink: #1d4ed8;
    --calc-selection-bg: rgba(37, 99, 235, 0.2);

    --calc-success: #059669;
    --calc-success-rgb: 5, 150, 105;
    --calc-danger: #dc2626;
    --calc-danger-rgb: 220, 38, 38;
    --calc-warning: #b45309;
    --calc-warning-rgb: 180, 83, 9;

    --calc-success-ink: #047857;
    --calc-danger-ink: #b91c1c;
    --calc-warning-ink: #92400e;
    --calc-success-soft: rgba(5, 150, 105, 0.1);
    --calc-danger-soft: rgba(220, 38, 38, 0.08);
    --calc-warning-soft: rgba(217, 119, 6, 0.1);

    --calc-focus-ring: rgba(37, 99, 235, 0.35);
    --calc-shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.05);
    --calc-shadow: 0 1px 2px rgba(15, 23, 42, 0.04), 0 4px 16px rgba(15, 23, 42, 0.06);
    --calc-shadow-pop: 0 12px 32px rgba(15, 23, 42, 0.14);
    --calc-topbar-bg: rgba(255, 255, 255, 0.85);
    --calc-overlay: rgba(15, 23, 42, 0.45);

    /* Chart.js palette — read at runtime by the TypeScript charts. */
    --calc-chart-1: #2563eb;
    --calc-chart-2: #059669;
    --calc-chart-3: #0f172a;
    --calc-chart-4: #93c5fd;
    --calc-chart-5: #f59e0b;
    --calc-chart-6: #e11d48;
    --calc-chart-7: #7c3aed;
    --calc-chart-8: #0d9488;
    --calc-chart-grid: #e2e8f0;

    /* Category tints (the light values). */
    --calc-cat-financial: #059669;
    --calc-cat-financial-soft: rgba(5, 150, 105, 0.12);
    --calc-cat-labor: #4f46e5;
    --calc-cat-labor-soft: rgba(79, 70, 229, 0.12);
    --calc-cat-international-labor: #c026d3;
    --calc-cat-international-labor-soft: rgba(192, 38, 211, 0.12);
    --calc-cat-computers: #0284c7;
    --calc-cat-computers-soft: rgba(2, 132, 199, 0.12);
    --calc-cat-taxes: #b45309;
    --calc-cat-taxes-soft: rgba(180, 83, 9, 0.12);
    --calc-cat-education: #0891b2;
    --calc-cat-education-soft: rgba(8, 145, 178, 0.12);
    --calc-cat-date-time: #65a30d;
    --calc-cat-date-time-soft: rgba(101, 163, 13, 0.12);
    --calc-cat-scientific: #2563eb;
    --calc-cat-scientific-soft: rgba(37, 99, 235, 0.12);
    --calc-cat-lottery: #d97706;
    --calc-cat-lottery-soft: rgba(217, 119, 6, 0.12);
    --calc-cat-health: #e11d48;
    --calc-cat-health-soft: rgba(225, 29, 72, 0.12);
    --calc-cat-spiritual: #7c3aed;
    --calc-cat-spiritual-soft: rgba(124, 58, 237, 0.12);
    --calc-cat-miscellaneous: #0d9488;
    --calc-cat-miscellaneous-soft: rgba(13, 148, 136, 0.12);
    --calc-cat-site: #475569;
    --calc-cat-site-soft: rgba(71, 85, 105, 0.12);

    /* Item tints (data-calc-tint): one per lottery modality. */
    --calc-tint-mega-sena: #16a34a;
    --calc-tint-mega-sena-soft: rgba(22, 163, 74, 0.12);
    --calc-tint-quina: #6d28d9;
    --calc-tint-quina-soft: rgba(109, 40, 217, 0.12);
    --calc-tint-lotofacil: #a855f7;
    --calc-tint-lotofacil-soft: rgba(168, 85, 247, 0.14);
}

[data-bs-theme="dark"] {
    color-scheme: dark;

    --calc-bg: #0b1120;
    --calc-surface: #111827;
    --calc-surface-alt: #1e293b;
    --calc-border: #1f2a3d;
    --calc-border-strong: #334155;
    --calc-text: #e2e8f0;
    --calc-text-muted: #94a3b8;
    --calc-text-secondary: #b6c2d4;

    --calc-primary: #3b82f6;
    --calc-primary-rgb: 59, 130, 246;
    --calc-primary-hover: #60a5fa;
    --calc-primary-soft: rgba(59, 130, 246, 0.14);
    --calc-primary-ink: #93c5fd;
    --calc-selection-bg: rgba(59, 130, 246, 0.38);

    --calc-success: #10b981;
    --calc-success-rgb: 16, 185, 129;
    --calc-danger: #f87171;
    --calc-danger-rgb: 248, 113, 113;
    --calc-warning: #fbbf24;
    --calc-warning-rgb: 251, 191, 36;

    --calc-success-ink: #6ee7b7;
    --calc-danger-ink: #fca5a5;
    --calc-warning-ink: #fcd34d;
    --calc-success-soft: rgba(16, 185, 129, 0.13);
    --calc-danger-soft: rgba(248, 113, 113, 0.12);
    --calc-warning-soft: rgba(251, 191, 36, 0.12);

    --calc-focus-ring: rgba(59, 130, 246, 0.45);
    --calc-shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
    --calc-shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 4px 16px rgba(0, 0, 0, 0.35);
    --calc-shadow-pop: 0 12px 32px rgba(0, 0, 0, 0.55);
    --calc-topbar-bg: rgba(17, 24, 39, 0.85);
    --calc-overlay: rgba(2, 6, 23, 0.65);

    --calc-chart-1: #60a5fa;
    --calc-chart-2: #34d399;
    --calc-chart-3: #e2e8f0;
    --calc-chart-4: #1d4ed8;
    --calc-chart-5: #fbbf24;
    --calc-chart-6: #fb7185;
    --calc-chart-7: #a78bfa;
    --calc-chart-8: #2dd4bf;
    --calc-chart-grid: #1f2a3d;

    --calc-cat-financial: #34d399;
    --calc-cat-financial-soft: rgba(52, 211, 153, 0.14);
    --calc-cat-labor: #818cf8;
    --calc-cat-labor-soft: rgba(129, 140, 248, 0.14);
    --calc-cat-international-labor: #e879f9;
    --calc-cat-international-labor-soft: rgba(232, 121, 249, 0.14);
    --calc-cat-computers: #38bdf8;
    --calc-cat-computers-soft: rgba(56, 189, 248, 0.14);
    --calc-cat-taxes: #f59e0b;
    --calc-cat-taxes-soft: rgba(245, 158, 11, 0.14);
    --calc-cat-education: #22d3ee;
    --calc-cat-education-soft: rgba(34, 211, 238, 0.14);
    --calc-cat-date-time: #a3e635;
    --calc-cat-date-time-soft: rgba(163, 230, 53, 0.14);
    --calc-cat-scientific: #60a5fa;
    --calc-cat-scientific-soft: rgba(96, 165, 250, 0.14);
    --calc-cat-lottery: #fbbf24;
    --calc-cat-lottery-soft: rgba(251, 191, 36, 0.14);
    --calc-cat-health: #fb7185;
    --calc-cat-health-soft: rgba(251, 113, 133, 0.14);
    --calc-cat-spiritual: #a78bfa;
    --calc-cat-spiritual-soft: rgba(167, 139, 250, 0.14);
    --calc-cat-miscellaneous: #2dd4bf;
    --calc-cat-miscellaneous-soft: rgba(45, 212, 191, 0.14);
    --calc-cat-site: #94a3b8;
    --calc-cat-site-soft: rgba(148, 163, 184, 0.14);

    --calc-tint-mega-sena: #4ade80;
    --calc-tint-mega-sena-soft: rgba(74, 222, 128, 0.14);
    --calc-tint-quina: #8b5cf6;
    --calc-tint-quina-soft: rgba(139, 92, 246, 0.18);
    --calc-tint-lotofacil: #d8b4fe;
    --calc-tint-lotofacil-soft: rgba(216, 180, 254, 0.14);
}

/* Legacy aliases — templates and TypeScript charts still reference these. */
:root,
[data-bs-theme="light"],
[data-bs-theme="dark"] {
    --calc-brand-color: var(--calc-primary);
    --calc-brand-ink: var(--calc-primary);
    --calc-brand-muted: var(--calc-primary-soft);
    --calc-accent: var(--calc-success);
    --calc-accent-ink: var(--calc-success);
    --calc-accent-muted: var(--calc-success-soft);
    --calc-link: var(--calc-primary-ink);
    --calc-positive: var(--calc-success);
    --calc-negative: var(--calc-danger);
    --calc-selection-ink: var(--calc-primary-ink);
    --calc-btn-primary-bg: var(--calc-btn-bg);
    --calc-btn-primary-border: var(--calc-btn-bg);
    --calc-btn-primary-color: var(--calc-btn-ink);
}

/* Category tint: any element (or ancestor) carrying data-calc-category. */
[data-calc-category="financial"] { --calc-cat: var(--calc-cat-financial); --calc-cat-soft: var(--calc-cat-financial-soft); }
[data-calc-category="labor"] { --calc-cat: var(--calc-cat-labor); --calc-cat-soft: var(--calc-cat-labor-soft); }
[data-calc-category="international-labor"] { --calc-cat: var(--calc-cat-international-labor); --calc-cat-soft: var(--calc-cat-international-labor-soft); }
[data-calc-category="computers"] { --calc-cat: var(--calc-cat-computers); --calc-cat-soft: var(--calc-cat-computers-soft); }
[data-calc-category="taxes"] { --calc-cat: var(--calc-cat-taxes); --calc-cat-soft: var(--calc-cat-taxes-soft); }
[data-calc-category="education"] { --calc-cat: var(--calc-cat-education); --calc-cat-soft: var(--calc-cat-education-soft); }
[data-calc-category="date-time"] { --calc-cat: var(--calc-cat-date-time); --calc-cat-soft: var(--calc-cat-date-time-soft); }
[data-calc-category="scientific"] { --calc-cat: var(--calc-cat-scientific); --calc-cat-soft: var(--calc-cat-scientific-soft); }
[data-calc-category="lottery"] { --calc-cat: var(--calc-cat-lottery); --calc-cat-soft: var(--calc-cat-lottery-soft); }
[data-calc-category="health"] { --calc-cat: var(--calc-cat-health); --calc-cat-soft: var(--calc-cat-health-soft); }
[data-calc-category="spiritual"] { --calc-cat: var(--calc-cat-spiritual); --calc-cat-soft: var(--calc-cat-spiritual-soft); }
[data-calc-category="miscellaneous"] { --calc-cat: var(--calc-cat-miscellaneous); --calc-cat-soft: var(--calc-cat-miscellaneous-soft); }
[data-calc-category="site"] { --calc-cat: var(--calc-cat-site); --calc-cat-soft: var(--calc-cat-site-soft); }

/* Item tint: overrides the category tint for one menu item. Keep after the category rules. */
[data-calc-tint="mega-sena"] { --calc-cat: var(--calc-tint-mega-sena); --calc-cat-soft: var(--calc-tint-mega-sena-soft); }
[data-calc-tint="quina"] { --calc-cat: var(--calc-tint-quina); --calc-cat-soft: var(--calc-tint-quina-soft); }
[data-calc-tint="lotofacil"] { --calc-cat: var(--calc-tint-lotofacil); --calc-cat-soft: var(--calc-tint-lotofacil-soft); }

/* ==========================================================================
   2. Bootstrap bridge — every Bootstrap component follows the theme
   ========================================================================== */

:root,
[data-bs-theme="light"],
[data-bs-theme="dark"] {
    --bs-body-font-family: var(--calc-font-sans);
    --bs-body-font-size: var(--calc-font-size-base);
    --bs-body-line-height: var(--calc-line-height);
    --bs-body-bg: var(--calc-bg);
    --bs-body-bg-rgb: 248, 250, 252;
    --bs-body-color: var(--calc-text);
    --bs-emphasis-color: var(--calc-text);
    --bs-secondary-color: var(--calc-text-muted);
    --bs-tertiary-color: var(--calc-text-muted);
    --bs-tertiary-bg: var(--calc-surface-alt);
    --bs-secondary-bg: var(--calc-surface-alt);
    --bs-border-color: var(--calc-border);
    --bs-border-color-translucent: var(--calc-border);
    --bs-border-radius: var(--calc-radius-sm);
    --bs-border-radius-sm: 0.375rem;
    --bs-border-radius-lg: var(--calc-radius-lg);
    --bs-border-radius-xl: 1.25rem;
    --bs-primary: var(--calc-primary);
    --bs-primary-rgb: var(--calc-primary-rgb);
    --bs-success: var(--calc-success);
    --bs-success-rgb: var(--calc-success-rgb);
    --bs-danger: var(--calc-danger);
    --bs-danger-rgb: var(--calc-danger-rgb);
    --bs-warning: var(--calc-warning);
    --bs-warning-rgb: var(--calc-warning-rgb);
    --bs-link-color: var(--calc-primary);
    --bs-link-color-rgb: var(--calc-primary-rgb);
    --bs-link-hover-color: var(--calc-primary-hover);
    --bs-link-hover-color-rgb: var(--calc-primary-rgb);
    --bs-focus-ring-color: var(--calc-focus-ring);
    --bs-form-invalid-color: var(--calc-danger);
    --bs-form-invalid-border-color: var(--calc-danger);
    --bs-heading-color: var(--calc-text);
    --bs-code-color: var(--calc-primary-ink);
}

[data-bs-theme="dark"] {
    --bs-body-bg-rgb: 11, 17, 32;
}

/* ==========================================================================
   3. Base
   ========================================================================== */

html {
    font-size: 87.5%;
    scroll-padding-top: calc(var(--calc-topbar-height) + 1rem);
    -webkit-text-size-adjust: 100%;
}

body {
    margin: 0;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    font-family: var(--calc-font-sans);
    font-size: var(--calc-font-size-base);
    line-height: var(--calc-line-height);
    background-color: var(--calc-bg);
    color: var(--calc-text);
    font-variant-numeric: tabular-nums;
    font-feature-settings: "tnum";
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, h5, h6 {
    color: var(--calc-text);
    font-weight: 700;
    letter-spacing: -0.01em;
}

a {
    text-underline-offset: 0.18em;
}

hr {
    border-color: var(--calc-border);
    opacity: 1;
}

::selection {
    background: var(--calc-selection-bg);
    color: inherit;
}

:focus-visible {
    outline: 2px solid var(--calc-primary);
    outline-offset: 2px;
}

.form-control:focus-visible,
.form-select:focus-visible,
.form-check-input:focus-visible {
    outline: 0;
}

/* Containers focused by script (offcanvas, dialogs, skip-link target) get no ring. */
[tabindex="-1"]:focus-visible {
    outline: 0;
}

.btn:focus-visible,
.page-link:focus-visible {
    outline: 2px solid var(--calc-primary);
    outline-offset: 2px;
    box-shadow: none;
}

html,
.calc-search-results,
.calc-catmenu-list,
.calc-catmenu-panes,
.calc-lang-menu,
.calc-consent,
.offcanvas-body,
.modal-body,
.table-responsive {
    scrollbar-width: thin;
    scrollbar-color: var(--calc-border-strong) transparent;
}

/* Positioned so visually-hidden labels inside a table stay in its scroll box (no page overflow). */
.table-responsive {
    position: relative;
}

.calc-tabular-nums,
.calc-amount {
    font-variant-numeric: tabular-nums;
    font-feature-settings: "tnum";
}

/* ==========================================================================
   4. Shell — skip link, topbar, categories menu, search, drawer, main, breadcrumb
   ========================================================================== */

.calc-skip-link {
    position: fixed;
    inset-block-start: 0.5rem;
    inset-inline-start: 0.5rem;
    z-index: 2000;
    padding: 0.625rem 1rem;
    border-radius: var(--calc-radius-sm);
    background: var(--calc-btn-bg);
    color: var(--calc-btn-ink);
    font-weight: 600;
    text-decoration: none;
    box-shadow: var(--calc-shadow-pop);
    transform: translateY(-300%);
    transition: transform 0.15s ease;
}

.calc-skip-link:focus,
.calc-skip-link:focus-visible {
    transform: translateY(0);
    color: var(--calc-btn-ink);
    outline: 2px solid var(--calc-btn-ink);
    outline-offset: -4px;
}

.calc-topbar {
    position: sticky;
    top: 0;
    z-index: 1030;
    min-height: var(--calc-topbar-height);
    background-color: var(--calc-topbar-bg);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--calc-border);
}

@supports not ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
    .calc-topbar {
        background-color: var(--calc-surface);
    }
}

.calc-topbar-inner {
    max-width: 1400px;
    height: var(--calc-topbar-height);
    margin-inline: auto;
    padding-inline: 1rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.calc-brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-shrink: 0;
    margin: 0;
    padding: 0;
    font-size: 1.15rem;
    font-weight: 700;
    letter-spacing: -0.01em;
    white-space: nowrap;
    text-decoration: none;
    color: var(--calc-text);
}

.calc-brand:hover,
.calc-brand:focus {
    color: var(--calc-text);
}

.calc-logo {
    display: block;
    flex-shrink: 0;
}

.calc-brand-name em {
    font-style: normal;
    color: var(--calc-primary);
}

.calc-topbar-actions {
    margin-inline-start: auto;
    display: flex;
    align-items: center;
    gap: 0.25rem;
    flex-shrink: 0;
}

.calc-icon-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    padding: 0;
    border: 0;
    border-radius: 50%;
    background: transparent;
    color: var(--calc-text-secondary);
    text-decoration: none;
    cursor: pointer;
    transition: background-color 0.15s ease, color 0.15s ease;
}

.calc-icon-button:hover,
.calc-icon-button:focus-visible,
.calc-icon-button.show {
    background-color: var(--calc-surface-alt);
    color: var(--calc-text);
}

.calc-icon-button.dropdown-toggle::after {
    display: none;
}

.calc-icon-button .material-symbols-outlined {
    font-size: 1.5rem;
}

[data-bs-theme="light"] .calc-theme-icon-light,
[data-bs-theme="dark"] .calc-theme-icon-dark {
    display: none;
}

/*
 * Categories menu (>= lg): a button in the top bar opens a full-width panel below it, with the
 * category list on the start side and the selected category's calculators on the end side. The
 * dropdown wrapper stays static so the panel is positioned against the sticky .calc-topbar.
 */
.calc-catmenu-wrap {
    position: static;
    flex-shrink: 0;
}

.calc-catmenu-toggle {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    height: 40px;
    padding: 0 0.875rem 0 0.625rem;
    border: 1px solid var(--calc-border);
    border-radius: var(--calc-radius-sm);
    background: transparent;
    color: var(--calc-text);
    font: inherit;
    font-weight: 600;
    line-height: 1.25;
    white-space: nowrap;
    cursor: pointer;
    transition: background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

[dir="rtl"] .calc-catmenu-toggle {
    padding: 0 0.625rem 0 0.875rem;
}

.calc-catmenu-toggle .material-symbols-outlined {
    font-size: 1.375rem;
}

.calc-catmenu-toggle::after {
    margin-inline-start: 0.125rem;
    transition: transform 0.15s ease;
}

.calc-catmenu-toggle:hover,
.calc-catmenu-toggle:focus-visible {
    background-color: var(--calc-surface-alt);
    border-color: var(--calc-border-strong);
}

.calc-catmenu-toggle.active {
    color: var(--calc-primary-ink);
}

.calc-catmenu-toggle.show {
    background-color: var(--calc-primary-soft);
    border-color: transparent;
    color: var(--calc-primary-ink);
}

.calc-catmenu-toggle.show::after {
    transform: rotate(180deg);
}

.calc-topbar .calc-catmenu,
.calc-topbar .calc-catmenu[data-bs-popper] {
    top: 100%;
    left: 0;
    right: 0;
    width: auto;
    min-width: 0;
    margin: 0;
    padding: 0;
    border: 0;
    border-bottom: 1px solid var(--calc-border);
    border-radius: 0;
    background: var(--calc-surface);
    box-shadow: var(--calc-shadow-pop);
    z-index: 1040;
}

.calc-catmenu-inner {
    max-width: 1400px;
    margin-inline: auto;
    display: grid;
    grid-template-columns: minmax(16rem, 19rem) minmax(0, 1fr);
    max-height: calc(100vh - var(--calc-topbar-height) - 1rem);
    max-height: calc(100dvh - var(--calc-topbar-height) - 1rem);
}

.calc-catmenu-list {
    display: flex;
    flex-direction: column;
    gap: 0.125rem;
    padding: 0.75rem;
    border-inline-end: 1px solid var(--calc-border);
    overflow-y: auto;
}

.calc-catmenu-tab {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    width: 100%;
    padding: 0.375rem 0.5rem;
    border: 0;
    border-radius: var(--calc-radius-sm);
    background: transparent;
    color: var(--calc-text);
    font: inherit;
    font-weight: 500;
    text-align: start;
    cursor: pointer;
    transition: background-color 0.15s ease, color 0.15s ease;
}

.calc-catmenu-tab .calc-page-icon-sm {
    width: 2rem;
    height: 2rem;
    flex-shrink: 0;
    border-radius: var(--calc-radius-sm);
}

.calc-catmenu-tab .calc-page-icon-sm .material-symbols-outlined {
    font-size: 1.25rem;
}

.calc-catmenu-label {
    flex: 1 1 auto;
    min-width: 0;
}

.calc-catmenu-chevron {
    font-size: 1.25rem;
    color: var(--calc-text-muted);
    opacity: 0;
    transition: opacity 0.15s ease;
}

.calc-catmenu-tab:hover,
.calc-catmenu-tab:focus-visible {
    background-color: var(--calc-surface-alt);
}

.calc-catmenu-tab.current .calc-catmenu-label {
    color: var(--calc-primary-ink);
    font-weight: 600;
}

.calc-catmenu-tab[aria-selected="true"] {
    background-color: var(--calc-primary-soft);
    font-weight: 600;
}

.calc-catmenu-tab[aria-selected="true"] .calc-catmenu-chevron {
    opacity: 1;
    color: var(--calc-primary-ink);
}

.calc-catmenu-panes {
    min-width: 0;
    padding: 0.75rem 1rem 1rem;
    overflow-y: auto;
}

.calc-catmenu-pane-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 0.5rem;
    padding: 0 0 0.5rem 0.625rem;
    border-bottom: 1px solid var(--calc-border);
}

[dir="rtl"] .calc-catmenu-pane-head {
    padding: 0 0.625rem 0.5rem 0;
}

.calc-catmenu-pane-title {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--calc-text);
}

.calc-catmenu-pane-head .calc-mega-all {
    width: auto;
    border-radius: var(--calc-radius-sm);
    white-space: nowrap;
}

.calc-catmenu-items {
    margin: 0;
    padding: 0;
    list-style: none;
    columns: 3 15rem;
    column-gap: 0.5rem;
}

.calc-catmenu-items > li {
    break-inside: avoid;
}

/* Calculator links of the categories menu. */
.calc-mega-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem 0.625rem;
    border-radius: var(--calc-radius-sm);
    white-space: normal;
    color: var(--calc-text);
    text-decoration: none;
}

.calc-mega-item .calc-page-icon,
.calc-mega-item .calc-page-icon-sm {
    width: 2rem;
    height: 2rem;
    border-radius: var(--calc-radius-sm);
}

.calc-mega-item .calc-page-icon .material-symbols-outlined,
.calc-mega-item .calc-page-icon-sm .material-symbols-outlined {
    font-size: 1.25rem;
}

.calc-mega-item > .material-symbols-outlined {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2rem;
    height: 2rem;
    border-radius: var(--calc-radius-sm);
    background: var(--calc-cat-soft, var(--calc-primary-soft));
    color: var(--calc-cat, var(--calc-primary));
    font-size: 1.25rem;
}

.calc-mega-item:hover,
.calc-mega-item:focus {
    background-color: var(--calc-primary-soft);
    color: var(--calc-text);
}

.calc-mega-item.active {
    background-color: var(--calc-primary-soft);
    color: var(--calc-primary-ink);
    font-weight: 600;
}

.calc-mega-all {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.375rem;
    padding: 0.5rem 0.625rem;
    color: var(--calc-primary-ink);
    font-weight: 600;
    text-decoration: none;
}

.calc-mega-all:hover,
.calc-mega-all:focus {
    background-color: var(--calc-primary-soft);
    color: var(--calc-primary-ink);
}

[dir="rtl"] .calc-mega-all .material-symbols-outlined {
    transform: scaleX(-1);
}

/* Live search. */
.calc-search {
    position: relative;
    flex: 1 1 auto;
    max-width: 28rem;
    min-width: 0;
}

.calc-topbar-inner > .calc-search {
    margin-inline-start: 0.5rem;
}

.calc-search-icon {
    position: absolute;
    inset-inline-start: 0.875rem;
    top: 50%;
    transform: translateY(-50%);
    font-size: 1.25rem;
    color: var(--calc-text-muted);
    pointer-events: none;
}

.calc-search-input,
.form-control.calc-search-input {
    display: block;
    width: 100%;
    height: 2.5rem;
    padding-block: 0;
    padding-inline: 2.75rem 1rem;
    border: 1px solid transparent;
    border-radius: var(--calc-radius-pill);
    background-color: var(--calc-surface-alt);
    color: var(--calc-text);
    font: inherit;
    box-shadow: none;
    transition: background-color 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease;
}

.calc-search-input::placeholder {
    color: var(--calc-text-muted);
    opacity: 1;
}

.calc-search-input:focus,
.form-control.calc-search-input:focus {
    background-color: var(--calc-surface);
    border-color: var(--calc-primary);
    box-shadow: 0 0 0 3px var(--calc-focus-ring);
    color: var(--calc-text);
    outline: 0;
}

.calc-search-input::-webkit-search-cancel-button {
    -webkit-appearance: none;
    appearance: none;
}

.calc-search-results {
    position: absolute;
    inset-inline: 0;
    top: 100%;
    z-index: 1060;
    margin: 0.375rem 0 0;
    padding: 0.25rem;
    max-height: 60vh;
    overflow-y: auto;
    list-style: none;
    background: var(--calc-surface);
    border: 1px solid var(--calc-border);
    border-radius: var(--calc-radius);
    box-shadow: var(--calc-shadow-pop);
}

.calc-search-results[hidden] {
    display: none;
}

.calc-search-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem 0.625rem;
    border-radius: var(--calc-radius-sm);
    color: var(--calc-text);
    text-decoration: none;
    cursor: pointer;
}

.calc-search-item > .material-symbols-outlined {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2rem;
    height: 2rem;
    border-radius: var(--calc-radius-sm);
    background: var(--calc-cat-soft, var(--calc-primary-soft));
    color: var(--calc-cat, var(--calc-primary));
    font-size: 1.25rem;
}

.calc-search-item > :nth-child(2) {
    flex: 1 1 auto;
    min-width: 0;
}

/* Markup built by search.ts: li.calc-search-item > a > tile + .calc-search-label + .calc-search-section */
.calc-search-item > a {
    min-width: 0;
}

.calc-search-label {
    flex: 1 1 auto;
    min-width: 0;
    font-weight: 500;
}

.calc-search-item > :nth-child(3),
.calc-search-section {
    margin-inline-start: auto;
    padding-inline-start: 0.5rem;
    font-size: 0.8125rem;
    color: var(--calc-text-muted);
    white-space: nowrap;
}

.calc-search-item:hover,
.calc-search-item.active,
.calc-search-item[aria-selected="true"] {
    background-color: var(--calc-primary-soft);
    color: var(--calc-text);
}

.calc-search-empty {
    padding: 0.75rem 0.875rem;
    color: var(--calc-text-muted);
}

/* Hero variant. */
.calc-search-lg {
    max-width: none;
}

.calc-search-lg .calc-search-input,
.calc-search-input.calc-search-lg {
    height: 3.25rem;
    padding-inline-start: 3.25rem;
    font-size: var(--calc-font-size-lg);
}

.calc-search-lg .calc-search-icon {
    inset-inline-start: 1.125rem;
    font-size: 1.5rem;
}

.calc-hero-search .calc-search {
    max-width: none;
}

/* Offcanvas drawer (screens below lg). */
.calc-drawer {
    --bs-offcanvas-width: min(22rem, 88vw);
    --bs-offcanvas-bg: var(--calc-surface);
    --bs-offcanvas-color: var(--calc-text);
    --bs-offcanvas-border-color: var(--calc-border);
    width: min(22rem, 88vw);
}

.calc-drawer .offcanvas-header {
    border-bottom: 1px solid var(--calc-border);
}

.calc-drawer .offcanvas-body {
    padding: 1rem;
}

.calc-drawer .calc-search {
    max-width: none;
    margin-bottom: 0.5rem;
}

.calc-drawer .calc-search-results {
    position: static;
    max-height: none;
    margin-top: 0.5rem;
    box-shadow: none;
}

.calc-drawer-section {
    margin-top: 1.25rem;
}

.calc-drawer-section > h2,
.calc-drawer-section > h3,
.calc-drawer-section > h4,
.calc-drawer-heading {
    margin: 0 0 0.375rem;
    padding-inline: 0.75rem;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--calc-text-muted);
}

.calc-drawer-section > ul,
.calc-drawer-section > nav,
.calc-drawer-list {
    margin: 0;
    padding: 0;
    list-style: none;
}

.calc-drawer-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.625rem 0.75rem;
    border-radius: var(--calc-radius-sm);
    color: var(--calc-text);
    text-decoration: none;
}

.calc-drawer-link > .material-symbols-outlined {
    font-size: 1.375rem;
    color: var(--calc-cat, var(--calc-text-muted));
}

.calc-drawer-link:hover,
.calc-drawer-link:focus-visible {
    background-color: var(--calc-surface-alt);
    color: var(--calc-text);
}

.calc-drawer-link.active,
.calc-drawer-link[aria-current="page"] {
    background-color: var(--calc-primary-soft);
    color: var(--calc-primary-ink);
    font-weight: 600;
}

/* Drawer category groups (native <details> accordion). */
.calc-drawer-group {
    border-bottom: 1px solid var(--calc-border);
}

.calc-drawer-group:first-of-type {
    margin-top: 0.75rem;
    border-top: 1px solid var(--calc-border);
}

.calc-drawer-summary {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    min-height: 3rem;
    padding: 0.5rem 0.5rem;
    list-style: none;
    font-weight: 600;
    color: var(--calc-text);
    cursor: pointer;
    -webkit-user-select: none;
    user-select: none;
}

.calc-drawer-summary::-webkit-details-marker {
    display: none;
}

.calc-drawer-summary:hover,
.calc-drawer-summary:focus-visible {
    background-color: var(--calc-surface-alt);
}

.calc-drawer-summary .calc-page-icon-sm {
    width: 2rem;
    height: 2rem;
    flex-shrink: 0;
    border-radius: var(--calc-radius-sm);
}

.calc-drawer-summary .calc-page-icon-sm .material-symbols-outlined {
    font-size: 1.25rem;
}

.calc-drawer-summary-label {
    flex: 1 1 auto;
    min-width: 0;
}

.calc-drawer-chevron {
    color: var(--calc-text-muted);
    transition: transform 0.15s ease;
}

.calc-drawer-group[open] > .calc-drawer-summary .calc-drawer-chevron {
    transform: rotate(180deg);
}

.calc-drawer-group[open] > .calc-drawer-summary .calc-drawer-summary-label {
    color: var(--calc-primary-ink);
}

.calc-drawer-group-body {
    padding: 0 0 0.5rem;
}

.calc-drawer-all {
    color: var(--calc-primary-ink);
    font-weight: 600;
}

.calc-drawer-all > .material-symbols-outlined {
    color: var(--calc-primary-ink);
}

/* Main canvas. */
.calc-main {
    flex: 1 0 auto;
    width: 100%;
    min-width: 0;
    padding: 1.5rem 1rem 3rem;
}

@media (min-width: 768px) {
    .calc-main {
        padding: 2rem 1.5rem 4rem;
    }
}

.calc-page-area {
    width: 100%;
    max-width: var(--calc-content-max-width);
    margin-inline: auto;
}

/* Breadcrumb. */
.calc-breadcrumb {
    --bs-breadcrumb-divider: '›';
    --bs-breadcrumb-divider-color: var(--calc-text-muted);
    --bs-breadcrumb-item-active-color: var(--calc-text-secondary);
    --bs-breadcrumb-item-padding-x: 0.5rem;
    --bs-breadcrumb-margin-bottom: 1rem;
    margin-bottom: 1rem;
    font-size: 0.875rem;
    color: var(--calc-text-muted);
}

.calc-breadcrumb .breadcrumb {
    --bs-breadcrumb-divider: '›';
    --bs-breadcrumb-divider-color: var(--calc-text-muted);
    --bs-breadcrumb-margin-bottom: 0;
    margin-bottom: 0;
    font-size: inherit;
}

.calc-breadcrumb.breadcrumb {
    margin-bottom: 1rem;
}

.calc-breadcrumb a {
    color: var(--calc-text-muted);
    text-decoration: none;
}

.calc-breadcrumb a:hover,
.calc-breadcrumb a:focus-visible {
    color: var(--calc-primary-ink);
    text-decoration: underline;
}

.calc-breadcrumb .breadcrumb-item.active {
    color: var(--calc-text-secondary);
    font-weight: 500;
}

[dir="rtl"] .calc-breadcrumb,
[dir="rtl"] .calc-breadcrumb .breadcrumb {
    --bs-breadcrumb-divider: '‹';
}

/* Helper for icons that imply direction (chevrons, arrows). */
[dir="rtl"] .calc-rtl-flip {
    transform: scaleX(-1);
}

/* ==========================================================================
   5. Page anatomy
   ========================================================================== */

.calc-page-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.calc-page-header > :not(.calc-page-icon):not(.calc-page-icon-sm) {
    min-width: 0;
}

.calc-page-icon,
.calc-page-icon-sm {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    width: 3rem;
    height: 3rem;
    border-radius: var(--calc-radius);
    background-color: var(--calc-cat-soft, var(--calc-primary-soft));
    color: var(--calc-cat, var(--calc-primary));
}

.calc-page-icon .material-symbols-outlined,
.calc-page-icon-sm .material-symbols-outlined {
    font-size: 1.75rem;
}

.calc-page-icon-sm,
.calc-page-icon.calc-page-icon-sm {
    width: 2.5rem;
    height: 2.5rem;
}

.calc-page-icon-sm .material-symbols-outlined,
.calc-page-icon.calc-page-icon-sm .material-symbols-outlined {
    font-size: 1.5rem;
}

.calc-page-title {
    margin: 0;
    font-size: 1.75rem;
    font-weight: 700;
    letter-spacing: -0.01em;
    line-height: 1.2;
    /* Long compound words (German, Russian) hyphenate instead of pushing the page wider than a phone. */
    overflow-wrap: break-word;
    hyphens: auto;
}

.calc-page-subtitle {
    margin: 0.25rem 0 0;
    max-width: 70ch;
    color: var(--calc-text-muted);
}

.calc-card {
    background-color: var(--calc-surface);
    color: var(--calc-text);
    border: 1px solid var(--calc-border);
    border-radius: var(--calc-radius-lg);
    box-shadow: var(--calc-shadow);
}

.calc-card .table {
    margin-bottom: 0;
}

.calc-form-card > .card-body {
    padding: 1.5rem;
}

.calc-form-card:not(.card) {
    padding: 1.5rem;
}

.calc-form-area {
    width: 100%;
    max-width: var(--calc-content-max-width);
}

.calc-form-section {
    min-width: 0;
    margin: 0 0 1.5rem;
    padding: 0;
    border: 0;
}

.calc-form-section > legend {
    float: none;
    width: auto;
    margin: 0 0 0.75rem;
    padding: 0;
    font-size: 0.8125rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--calc-text-muted);
}

.calc-form-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 1.5rem;
    padding-top: 1.25rem;
    border-top: 1px solid var(--calc-border);
}

/* Field grid (fragments/form-inputs): every field is one equal-width cell (.calc-field). Cells on the
   same line share three rows (label, control, message) through subgrid, so controls line up even when a
   label wraps or a field shows an error. Columns: 1, 2 (576px), 3 (768px), 4 (992px). */
.calc-fields {
    --calc-fields-cols: 1;
    display: grid;
    grid-template-columns: repeat(var(--calc-fields-cols), minmax(0, 1fr));
    column-gap: 1rem;
    row-gap: 0;
    margin-block-end: -1rem;
}

@media (min-width: 576px) {
    .calc-fields {
        --calc-fields-cols: 2;
    }
}

@media (min-width: 768px) {
    .calc-fields {
        --calc-fields-cols: 3;
    }
}

@media (min-width: 992px) {
    .calc-fields {
        --calc-fields-cols: 4;
    }
}

/* Always one column: modals and the admin login. */
.calc-fields.calc-fields-stack {
    --calc-fields-cols: 1;
}

/* Show/hide wrappers (calc-switch.ts) let their field join the grid. */
.calc-fields > [data-calc-switch-name]:not([hidden]) {
    display: contents;
}

.calc-fields .calc-field {
    display: grid;
    grid-row: span 3;
    grid-template-rows: subgrid;
    grid-template-columns: minmax(0, 1fr);
    row-gap: 0;
    min-width: 0;
    padding-block-end: 1rem;
}

.calc-fields .calc-field > * {
    grid-row: 2;
    align-self: start;
    min-width: 0;
}

.calc-fields .calc-field > .form-label {
    grid-row: 1;
    align-self: end;
}

.calc-fields .calc-field > .invalid-feedback {
    grid-row: 3;
}

.calc-fields .calc-field-span-2,
.calc-fields .calc-field-full {
    grid-column: 1 / -1;
}

@media (min-width: 576px) {
    .calc-fields:not(.calc-fields-stack) .calc-field-span-2 {
        grid-column: span 2;
    }
}

/* Radio groups fill their cell with equal buttons. */
.calc-fields .calc-field > .btn-group {
    display: flex;
    width: 100%;
}

.calc-fields .calc-field > .btn-group > .btn {
    flex: 1 1 0;
    min-width: 0;
    white-space: normal;
    overflow-wrap: normal;
    word-break: normal;
    padding-block: 0.375rem;
}

/* A word that does not fit its button stacks the options one per line (form-inputs.ts fitRadioGroup). */
.calc-fields .calc-field > .btn-group.calc-btn-group-stack {
    flex-direction: column;
}

.calc-fields .calc-field > .btn-group.calc-btn-group-stack > .btn {
    flex: 0 0 auto;
    width: 100%;
    margin-inline-start: 0;
    border-radius: 0;
}

.calc-fields .calc-field > .btn-group.calc-btn-group-stack > .btn:not(:first-of-type) {
    margin-block-start: calc(-1 * var(--bs-border-width));
}

.calc-fields .calc-field > .btn-group.calc-btn-group-stack > .btn:first-of-type {
    border-start-start-radius: var(--bs-border-radius);
    border-start-end-radius: var(--bs-border-radius);
}

.calc-fields .calc-field > .btn-group.calc-btn-group-stack > .btn:last-of-type {
    border-end-start-radius: var(--bs-border-radius);
    border-end-end-radius: var(--bs-border-radius);
}

/* Checkbox cell: box and text use the label and control rows, centred on the control line. */
.calc-fields .calc-field-check > .form-check {
    grid-row: 1 / span 2;
    align-self: end;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    min-height: calc(1.5em + 0.75rem + 2px);
    margin: 0;
    padding-inline-start: 0;
}

.calc-fields .calc-field-check > .form-check > .form-check-input {
    float: none;
    flex: 0 0 auto;
    margin: 0;
}

/* Muted paragraph right after a field grid. */
.calc-form-hint {
    margin: 0.75rem 0 0;
    font-size: var(--calc-font-size-sm);
    color: var(--calc-text-muted);
}

.calc-result {
    margin-block: 1.5rem;
    padding: 1.5rem;
    background-color: var(--calc-surface);
    color: var(--calc-text);
    border: 1px solid var(--calc-border);
    border-top: 2px solid var(--calc-primary);
    border-radius: var(--calc-radius-lg);
    box-shadow: var(--calc-shadow);
}

.calc-result-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(12rem, 100%), 1fr));
    gap: 1rem;
}

.calc-result-item {
    min-width: 0;
    padding: 1rem;
    border-radius: var(--calc-radius);
    background-color: var(--calc-surface-alt);
}

.calc-result-label {
    display: block;
    margin-bottom: 0.25rem;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--calc-text-secondary);
}

.calc-result-value,
.calc-result-value-primary {
    font-size: 1.75rem;
    font-weight: 700;
    line-height: 1.2;
    font-variant-numeric: tabular-nums;
    overflow-wrap: anywhere;
    color: var(--calc-text);
}

.calc-result-value-primary,
.calc-result-value.calc-result-value-primary {
    color: var(--calc-primary-ink);
}

.calc-chart-box {
    position: relative;
    min-height: 20rem;
    padding: 1rem;
    background-color: var(--calc-surface);
    border: 1px solid var(--calc-border);
    border-radius: var(--calc-radius-lg);
    box-shadow: var(--calc-shadow);
}

.calc-chart-box canvas {
    display: block;
    width: 100%;
    max-width: 100%;
}

.calc-howto {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--calc-border);
}

.calc-prose {
    max-width: 75ch;
    line-height: 1.7;
}

/* The how-it-works section is also .calc-prose: keep the divider full width, the text measure at 75ch. */
.calc-howto.calc-prose {
    max-width: none;
}

.calc-howto.calc-prose > * {
    max-width: 75ch;
}

.calc-prose h2 {
    margin: 0 0 0.75rem;
    font-size: 1.375rem;
    font-weight: 700;
}

.calc-prose h2:not(:first-child) {
    margin-top: 2rem;
}

.calc-prose h3 {
    margin: 1.5rem 0 0.5rem;
    font-size: 1.125rem;
    font-weight: 600;
}

.calc-prose p {
    margin-bottom: 1rem;
}

.calc-prose ul,
.calc-prose ol {
    margin-bottom: 1rem;
    padding-inline-start: 1.5rem;
}

.calc-prose li + li {
    margin-top: 0.25rem;
}

.calc-prose a {
    text-decoration: underline;
    text-underline-offset: 0.2em;
}

.calc-notice {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: var(--calc-text-muted);
}

.calc-notice > .material-symbols-outlined {
    margin-top: 0.0625rem;
    font-size: 1.125rem;
}

/* FAQ (fragments/page :: faq) */
.calc-faq-item { border-bottom: 1px solid var(--calc-border); padding-block: 0.5rem; }
.calc-faq-item > summary { cursor: pointer; font-weight: 600; }
.calc-faq-item > p { margin: 0.5rem 0 0; }

/* Repeatable rows (static/ts/calc-rows.ts) */
.calc-rows { display: flex; flex-direction: column; gap: 0.75rem; }
.calc-row { border: 1px solid var(--calc-border); border-radius: var(--calc-radius); padding: 0.75rem; }
.calc-row[hidden] { display: none; }
.calc-row-actions { display: flex; align-items: flex-end; justify-content: flex-end; }

/* ==========================================================================
   6. Home / category hubs
   ========================================================================== */

.calc-hero {
    padding: 3rem 1rem 2rem;
    text-align: center;
    background: radial-gradient(60rem 22rem at 50% -8rem, var(--calc-primary-soft), transparent 70%);
}

.calc-hero-title {
    margin: 0 0 0.75rem;
    font-size: 2.25rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    line-height: 1.15;
}

.calc-hero-subtitle {
    max-width: 42rem;
    margin: 0 auto;
    font-size: var(--calc-font-size-lg);
    color: var(--calc-text-muted);
}

.calc-hero-search {
    max-width: 36rem;
    margin: 1.5rem auto 0;
    text-align: start;
}

.calc-section-title {
    margin: 2.5rem 0 1rem;
    font-size: 1.25rem;
    font-weight: 700;
}

.calc-category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(min(18rem, 100%), 1fr));
    gap: 1rem;
}

.calc-category-card {
    min-width: 0;
    padding: 1.25rem;
    background-color: var(--calc-surface);
    color: var(--calc-text);
    border: 1px solid var(--calc-border);
    border-radius: var(--calc-radius-lg);
    box-shadow: var(--calc-shadow);
}

.calc-category-head {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.calc-category-title {
    font-weight: 700;
    color: var(--calc-text);
    text-decoration: none;
}

.calc-category-title:hover,
.calc-category-title:focus-visible {
    color: var(--calc-primary-ink);
}

.calc-category-desc {
    margin: 0.75rem 0 0;
    font-size: 0.875rem;
    color: var(--calc-text-muted);
}

.calc-category-list {
    display: grid;
    gap: 0.125rem;
    margin: 0.75rem 0 0;
    padding: 0;
    list-style: none;
}

.calc-category-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.375rem 0.5rem;
    border-radius: var(--calc-radius-sm);
    color: var(--calc-text);
    text-decoration: none;
}

.calc-category-link .material-symbols-outlined {
    font-size: 1.125rem;
    color: var(--calc-text-muted);
}

.calc-category-link .material-symbols-outlined[data-calc-tint] {
    color: var(--calc-cat);
}

.calc-category-link:hover,
.calc-category-link:focus-visible {
    background-color: var(--calc-primary-soft);
    color: var(--calc-primary-ink);
}

.calc-tool-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(min(16rem, 100%), 1fr));
    gap: 1rem;
}

.calc-tool-card {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    min-width: 0;
    padding: 1.25rem;
    background-color: var(--calc-surface);
    color: var(--calc-text);
    border: 1px solid var(--calc-border);
    border-radius: var(--calc-radius-lg);
    box-shadow: var(--calc-shadow);
    text-decoration: none;
    transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
}

.calc-tool-card:hover,
.calc-tool-card:focus-visible {
    transform: translateY(-2px);
    border-color: var(--calc-primary);
    box-shadow: var(--calc-shadow-pop);
    color: var(--calc-text);
}

.calc-tool-title {
    font-weight: 600;
}

.calc-tool-desc {
    font-size: 0.875rem;
    color: var(--calc-text-muted);
}

/* ==========================================================================
   7. Footer
   ========================================================================== */

.calc-footer {
    margin-top: 4rem;
    padding: 3rem 1rem 2rem;
    background-color: var(--calc-surface);
    border-top: 1px solid var(--calc-border);
    color: var(--calc-text-muted);
    font-size: 0.875rem;
}

.calc-footer-inner {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    max-width: 1200px;
    margin-inline: auto;
}

@media (min-width: 768px) {
    .calc-footer-inner {
        grid-template-columns: 2fr 1fr 1fr;
    }
}

.calc-footer-brand {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
    font-size: 1.15rem;
    font-weight: 700;
    letter-spacing: -0.01em;
    color: var(--calc-text);
    text-decoration: none;
}

.calc-footer-brand:hover {
    color: var(--calc-text);
}

.calc-footer-tagline {
    max-width: 28rem;
    margin: 0;
    font-size: 0.875rem;
    color: var(--calc-text-muted);
}

.calc-footer-heading {
    margin: 0 0 0.75rem;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--calc-text-muted);
}

.calc-footer-links {
    margin: 0;
    padding: 0;
    list-style: none;
}

.calc-footer-links li {
    margin: 0.25rem 0;
}

.calc-footer-links a,
.calc-footer-links .calc-footer-link-btn,
button.calc-footer-link-btn {
    padding: 0;
    border: 0;
    background: none;
    color: var(--calc-text-muted);
    font: inherit;
    text-align: start;
    text-decoration: none;
    cursor: pointer;
}

.calc-footer-links a:hover,
.calc-footer-links a:focus-visible,
button.calc-footer-link-btn:hover,
button.calc-footer-link-btn:focus-visible {
    color: var(--calc-primary-ink);
    text-decoration: underline;
}

.calc-footer-meta {
    grid-column: 1 / -1;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin-top: 2rem;
    padding-top: 1.25rem;
    border-top: 1px solid var(--calc-border);
    font-size: 0.875rem;
    color: var(--calc-text-muted);
    font-variant-numeric: tabular-nums;
}

.calc-footer-inner > .calc-footer-meta {
    margin-top: 0;
}

.calc-footer > .calc-footer-meta {
    max-width: 1200px;
    margin-inline: auto;
}

/* ==========================================================================
   8. Cookie consent
   ========================================================================== */

.calc-consent {
    position: fixed;
    inset-block-end: 1rem;
    inset-inline: 1rem;
    z-index: 1080;
    max-width: 44rem;
    max-height: calc(100vh - 2rem);
    overflow-y: auto;
    margin-inline: auto;
    padding: 1.25rem;
    background-color: var(--calc-surface);
    color: var(--calc-text);
    border: 1px solid var(--calc-border);
    border-radius: var(--calc-radius-lg);
    box-shadow: var(--calc-shadow-pop);
}

.calc-consent[hidden] {
    display: none;
}

.calc-consent-title {
    margin: 0 0 0.375rem;
    font-size: var(--calc-font-size-lg);
    font-weight: 700;
}

.calc-consent-text {
    margin: 0 0 1rem;
    font-size: 0.875rem;
    color: var(--calc-text-secondary);
}

.calc-consent-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

/* Accept all / Reject all / Customize share one size so no choice is nudged. */
.calc-consent-actions .btn {
    min-width: 9rem;
}

.calc-consent-category {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--calc-border);
}

.calc-consent-category:last-child {
    border-bottom: 0;
}

.calc-consent-category-text {
    flex: 1 1 auto;
    min-width: 0;
}

.calc-consent-category-title {
    margin: 0 0 0.125rem;
    font-size: 0.9375rem;
    font-weight: 600;
}

.calc-consent-category-description {
    margin: 0;
    font-size: 0.875rem;
    color: var(--calc-text-secondary);
}

.calc-consent-category .form-switch {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-shrink: 0;
    min-height: 0;
    margin: 0;
    padding-inline-start: 0;
    font-size: 0.875rem;
    color: var(--calc-text-muted);
}

.calc-consent-category .form-switch .form-check-input {
    float: none;
    margin: 0;
}

/* Preferences modal (#calc-consent-modal). It must sit above the fixed banner
   (z-index 1080); Bootstrap's own modal layer is 1055. */
.calc-consent-modal {
    z-index: 1090;
}

.calc-consent-modal .modal-content {
    border-radius: var(--calc-radius-lg);
}

.calc-consent-modal .modal-footer {
    flex-wrap: wrap;
    gap: 0.5rem;
}

.calc-consent-modal .modal-footer > * {
    margin: 0;
}

/* Keep the dimming backdrop right below the modal (not below the banner) while it is open. */
body:has(.calc-consent-modal.show) .modal-backdrop {
    --bs-backdrop-zindex: 1085;
}

@media (max-width: 575.98px) {
    .calc-consent {
        inset-block: auto 0;
        inset-inline: 0;
        max-width: none;
        max-height: 90vh;
        margin: 0;
        padding: 1.25rem 1rem calc(1.25rem + env(safe-area-inset-bottom, 0px));
        border-inline: 0;
        border-block-end: 0;
        border-radius: var(--calc-radius-lg) var(--calc-radius-lg) 0 0;
    }

    .calc-consent-actions .btn {
        flex: 1 1 auto;
    }
}

/* ==========================================================================
   9. Error page
   ========================================================================== */

.calc-error {
    padding: 4rem 1rem;
    text-align: center;
}

.calc-error-code {
    font-size: 4rem;
    font-weight: 800;
    line-height: 1.1;
    font-variant-numeric: tabular-nums;
    color: var(--calc-primary);
}

/* ==========================================================================
   10. Bootstrap components
   ========================================================================== */

/* Buttons. */
.btn {
    --bs-btn-font-weight: 500;
    --bs-btn-padding-x: 1rem;
    --bs-btn-padding-y: 0.5rem;
    --bs-btn-border-radius: var(--calc-radius-sm);
    transition: background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease, box-shadow 0.15s ease;
}

.btn-sm {
    --bs-btn-padding-x: 0.75rem;
    --bs-btn-padding-y: 0.3125rem;
    --bs-btn-font-size: 0.875rem;
    --bs-btn-border-radius: var(--calc-radius-sm);
}

.btn-lg {
    --bs-btn-padding-x: 1.5rem;
    --bs-btn-padding-y: 0.75rem;
    --bs-btn-font-size: var(--calc-font-size-lg);
}

.btn-primary,
.calc-btn-brand {
    --bs-btn-color: var(--calc-btn-ink);
    --bs-btn-bg: var(--calc-btn-bg);
    --bs-btn-border-color: var(--calc-btn-bg);
    --bs-btn-hover-color: var(--calc-btn-ink);
    --bs-btn-hover-bg: var(--calc-btn-bg-hover);
    --bs-btn-hover-border-color: var(--calc-btn-bg-hover);
    --bs-btn-focus-shadow-rgb: 37, 99, 235;
    --bs-btn-active-color: var(--calc-btn-ink);
    --bs-btn-active-bg: var(--calc-btn-bg-hover);
    --bs-btn-active-border-color: var(--calc-btn-bg-hover);
    --bs-btn-active-shadow: none;
    --bs-btn-disabled-color: var(--calc-btn-ink);
    --bs-btn-disabled-bg: var(--calc-btn-bg);
    --bs-btn-disabled-border-color: var(--calc-btn-bg);
    box-shadow: var(--calc-shadow-sm);
}

.btn-outline-primary {
    --bs-btn-color: var(--calc-primary-ink);
    --bs-btn-border-color: var(--calc-primary);
    --bs-btn-hover-color: var(--calc-btn-ink);
    --bs-btn-hover-bg: var(--calc-btn-bg);
    --bs-btn-hover-border-color: var(--calc-btn-bg);
    --bs-btn-focus-shadow-rgb: 37, 99, 235;
    --bs-btn-active-color: var(--calc-btn-ink);
    --bs-btn-active-bg: var(--calc-btn-bg-hover);
    --bs-btn-active-border-color: var(--calc-btn-bg-hover);
    --bs-btn-active-shadow: none;
    --bs-btn-disabled-color: var(--calc-primary-ink);
    --bs-btn-disabled-border-color: var(--calc-primary);
}

.btn-outline-secondary {
    --bs-btn-color: var(--calc-text);
    --bs-btn-bg: var(--calc-surface);
    --bs-btn-border-color: var(--calc-border-strong);
    --bs-btn-hover-color: var(--calc-text);
    --bs-btn-hover-bg: var(--calc-surface-alt);
    --bs-btn-hover-border-color: var(--calc-border-strong);
    --bs-btn-focus-shadow-rgb: 100, 116, 139;
    --bs-btn-active-color: var(--calc-text);
    --bs-btn-active-bg: var(--calc-surface-alt);
    --bs-btn-active-border-color: var(--calc-border-strong);
    --bs-btn-active-shadow: none;
    --bs-btn-disabled-color: var(--calc-text-muted);
    --bs-btn-disabled-bg: transparent;
    --bs-btn-disabled-border-color: var(--calc-border);
}

.btn-link {
    --bs-btn-color: var(--calc-primary-ink);
    --bs-btn-hover-color: var(--calc-primary-hover);
    --bs-btn-active-color: var(--calc-primary-hover);
}

.btn .material-symbols-outlined {
    vertical-align: middle;
}

.btn-close {
    --bs-btn-close-focus-shadow: 0 0 0 3px var(--calc-focus-ring);
}

/* Forms. */
.form-label {
    margin-bottom: 0.375rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--calc-text);
}

.form-control,
.form-select {
    background-color: var(--calc-surface);
    color: var(--calc-text);
    border-color: var(--calc-border-strong);
    border-radius: var(--calc-radius-sm);
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.form-control::placeholder {
    color: var(--calc-text-muted);
    opacity: 0.8;
}

.form-control:focus,
.form-select:focus {
    background-color: var(--calc-surface);
    color: var(--calc-text);
    border-color: var(--calc-primary);
    box-shadow: 0 0 0 3px var(--calc-focus-ring);
}

.form-control:disabled,
.form-control[readonly],
.form-select:disabled {
    background-color: var(--calc-surface-alt);
    color: var(--calc-text-muted);
}

.form-control.is-invalid,
.form-select.is-invalid {
    border-color: var(--calc-danger);
}

.invalid-feedback {
    color: var(--calc-danger-ink);
}

.input-group-text {
    background-color: var(--calc-surface-alt);
    color: var(--calc-text-muted);
    border-color: var(--calc-border-strong);
}

.input-group > .btn {
    z-index: 1;
}

.form-check-input {
    background-color: var(--calc-surface);
    border-color: var(--calc-border-strong);
}

.form-check-input:checked {
    background-color: var(--calc-btn-bg);
    border-color: var(--calc-btn-bg);
}

.form-check-input:focus {
    border-color: var(--calc-primary);
    box-shadow: 0 0 0 3px var(--calc-focus-ring);
}

.form-switch .form-check-input {
    width: 2.5em;
    height: 1.375em;
}

/* Tables. */
.table {
    --bs-table-color: var(--calc-text);
    --bs-table-bg: transparent;
    --bs-table-border-color: var(--calc-border);
    --bs-table-striped-color: var(--calc-text);
    --bs-table-striped-bg: var(--calc-surface-alt);
    --bs-table-hover-color: var(--calc-text);
    --bs-table-hover-bg: var(--calc-primary-soft);
    --bs-table-active-color: var(--calc-text);
    --bs-table-active-bg: var(--calc-primary-soft);
}

.table > thead > tr > th,
.table > thead th {
    border-bottom-color: var(--calc-border-strong);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--calc-text-muted);
    white-space: nowrap;
}

.table:not(.table-sm) > :not(caption) > * > * {
    padding: 0.625rem 0.75rem;
}

.calc-table {
    font-variant-numeric: tabular-nums;
}

/* Retirement plan: numbered questions. */
.calc-question {
    padding-block: 1.25rem;
    border-bottom: 1px solid var(--calc-border);
}

.calc-question:last-of-type {
    border-bottom: 0;
}

.calc-question-title {
    float: none;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.375rem;
    font-weight: 600;
    color: var(--calc-text);
    margin-bottom: 0.5rem;
}

.calc-question-number {
    display: inline-flex;
    flex: 0 0 auto;
    align-items: center;
    justify-content: center;
    inline-size: 2.25rem;
    block-size: 2.25rem;
    border-radius: 50%;
    background: var(--calc-primary-soft);
    color: var(--calc-primary);
    font-size: 1.125rem;
    font-weight: 700;
}

.calc-question-help {
    font-size: var(--calc-font-size-lg);
    color: var(--calc-text);
    max-inline-size: 60ch;
}

.calc-question .form-control,
.calc-question .btn {
    font-size: var(--calc-font-size-lg);
}

/* Retirement plan: headline result. */
.calc-retirement-hero {
    text-align: center;
    padding: 1.5rem;
    border-radius: var(--calc-radius);
    background: var(--calc-primary-soft);
    margin-bottom: 1.5rem;
}

.calc-retirement-hero-label {
    font-size: 1.375rem;
    font-weight: 600;
}

.calc-retirement-hero-value {
    font-size: 2.75rem;
    font-weight: 700;
    color: var(--calc-primary);
}

.calc-retirement-hero-note {
    font-size: var(--calc-font-size-lg);
}

.calc-table tr.calc-row-highlight > * {
    --bs-table-bg-type: var(--calc-primary-soft);
    --bs-table-accent-bg: var(--calc-primary-soft);
    font-weight: 600;
}

.calc-row-badge {
    margin-inline-start: 0.5rem;
    background: var(--calc-primary);
}

/* Barbecue calculator. */
.calc-bbq-group {
    margin-bottom: 1.25rem;
}

.calc-bbq-group-title {
    float: none;
    font-size: var(--calc-font-size-base);
    font-weight: 600;
}

.calc-check-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(13rem, 1fr));
    gap: 0.25rem 1rem;
}

.calc-bbq-group-row th {
    background: var(--calc-surface-2, var(--calc-bg));
}

/* Links that leave the site (confirmation modal, see external-link.ts). */
.calc-external-icon {
    font-size: 0.875em;
    opacity: 0.7;
    margin-inline-start: 0.25rem;
    vertical-align: middle;
}

.calc-external-host {
    font-weight: 600;
    word-break: break-all;
}

/* "Values from your last visit" notice (form-memory.ts, fragments/form-memory.html). */
.calc-form-memory {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem 0.75rem;
    margin-bottom: 1rem;
    padding: 0.5rem 0.75rem;
    border-radius: var(--calc-radius);
    background: var(--calc-primary-soft);
    color: var(--calc-text);
    font-size: var(--calc-font-size-sm);
}

.calc-form-memory > .material-symbols-outlined {
    color: var(--calc-primary);
    font-size: 1.125rem;
}

.calc-form-memory-text {
    flex: 1 1 12rem;
}

.calc-form-memory-clear {
    margin-inline-start: auto;
}

/* Row-selection checkbox column (admin visit log). */
.calc-select-cell {
    width: 1%;
    white-space: nowrap;
}

.calc-table th a {
    color: inherit;
    text-decoration: none;
}

.calc-table th a:hover,
.calc-table th a:focus-visible {
    color: var(--calc-primary-ink);
}

/* Alerts: soft tinted surface with an accent edge. */
.alert {
    --bs-alert-border-radius: var(--calc-radius);
    --bs-alert-padding-x: 1rem;
    --bs-alert-padding-y: 0.75rem;
    border-inline-start-width: 4px;
}

.alert-warning {
    --bs-alert-color: var(--calc-warning-ink);
    --bs-alert-bg: var(--calc-warning-soft);
    --bs-alert-border-color: rgba(var(--calc-warning-rgb), 0.3);
    --bs-alert-link-color: var(--calc-warning-ink);
    border-inline-start-color: var(--calc-warning);
}

.alert-info {
    --bs-alert-color: var(--calc-primary-ink);
    --bs-alert-bg: var(--calc-primary-soft);
    --bs-alert-border-color: rgba(var(--calc-primary-rgb), 0.3);
    --bs-alert-link-color: var(--calc-primary-ink);
    border-inline-start-color: var(--calc-primary);
}

.alert-danger {
    --bs-alert-color: var(--calc-danger-ink);
    --bs-alert-bg: var(--calc-danger-soft);
    --bs-alert-border-color: rgba(var(--calc-danger-rgb), 0.3);
    --bs-alert-link-color: var(--calc-danger-ink);
    border-inline-start-color: var(--calc-danger);
}

.alert-success {
    --bs-alert-color: var(--calc-success-ink);
    --bs-alert-bg: var(--calc-success-soft);
    --bs-alert-border-color: rgba(var(--calc-success-rgb), 0.3);
    --bs-alert-link-color: var(--calc-success-ink);
    border-inline-start-color: var(--calc-success);
}

.alert-link {
    font-weight: 600;
    text-decoration: underline;
}

/* Cards. */
.card {
    --bs-card-bg: var(--calc-surface);
    --bs-card-color: var(--calc-text);
    --bs-card-border-color: var(--calc-border);
    --bs-card-border-radius: var(--calc-radius-lg);
    --bs-card-inner-border-radius: calc(var(--calc-radius-lg) - 1px);
    --bs-card-cap-bg: var(--calc-surface-alt);
    --bs-card-cap-color: var(--calc-text);
}

.card.calc-card {
    box-shadow: var(--calc-shadow);
}

/* Modals. */
.modal {
    --bs-modal-bg: var(--calc-surface);
    --bs-modal-color: var(--calc-text);
    --bs-modal-border-color: var(--calc-border);
    --bs-modal-border-radius: var(--calc-radius-lg);
    --bs-modal-inner-border-radius: calc(var(--calc-radius-lg) - 1px);
    --bs-modal-header-border-color: var(--calc-border);
    --bs-modal-footer-border-color: var(--calc-border);
    --bs-modal-box-shadow: var(--calc-shadow-pop);
}

.modal-content {
    box-shadow: var(--calc-shadow-pop);
}

.modal-backdrop {
    --bs-backdrop-bg: #020617;
    --bs-backdrop-opacity: 0.55;
}

/* Dropdown menus. */
.dropdown-menu {
    --bs-dropdown-bg: var(--calc-surface);
    --bs-dropdown-color: var(--calc-text);
    --bs-dropdown-border-color: var(--calc-border);
    --bs-dropdown-border-radius: var(--calc-radius);
    --bs-dropdown-inner-border-radius: calc(var(--calc-radius) - 1px);
    --bs-dropdown-padding-x: 0.25rem;
    --bs-dropdown-padding-y: 0.25rem;
    --bs-dropdown-divider-bg: var(--calc-border);
    --bs-dropdown-box-shadow: var(--calc-shadow-pop);
    --bs-dropdown-link-color: var(--calc-text);
    --bs-dropdown-link-hover-color: var(--calc-text);
    --bs-dropdown-link-hover-bg: var(--calc-primary-soft);
    --bs-dropdown-link-active-color: var(--calc-primary-ink);
    --bs-dropdown-link-active-bg: var(--calc-primary-soft);
    --bs-dropdown-link-disabled-color: var(--calc-text-muted);
    --bs-dropdown-item-padding-x: 0.75rem;
    --bs-dropdown-item-padding-y: 0.5rem;
    --bs-dropdown-font-size: var(--calc-font-size-base);
}

.dropdown-item {
    border-radius: var(--calc-radius-sm);
}

.dropdown-item.active {
    font-weight: 600;
}

/* Pagination. */
.pagination {
    --bs-pagination-color: var(--calc-text);
    --bs-pagination-bg: var(--calc-surface);
    --bs-pagination-border-color: var(--calc-border);
    --bs-pagination-border-radius: var(--calc-radius-sm);
    --bs-pagination-hover-color: var(--calc-primary-ink);
    --bs-pagination-hover-bg: var(--calc-primary-soft);
    --bs-pagination-hover-border-color: var(--calc-border-strong);
    --bs-pagination-focus-color: var(--calc-primary-ink);
    --bs-pagination-focus-bg: var(--calc-primary-soft);
    --bs-pagination-focus-box-shadow: 0 0 0 3px var(--calc-focus-ring);
    --bs-pagination-active-color: var(--calc-btn-ink);
    --bs-pagination-active-bg: var(--calc-btn-bg);
    --bs-pagination-active-border-color: var(--calc-btn-bg);
    --bs-pagination-disabled-color: var(--calc-text-muted);
    --bs-pagination-disabled-bg: var(--calc-surface-alt);
    --bs-pagination-disabled-border-color: var(--calc-border);
}

/* Offcanvas (generic). */
.offcanvas {
    --bs-offcanvas-bg: var(--calc-surface);
    --bs-offcanvas-color: var(--calc-text);
    --bs-offcanvas-border-color: var(--calc-border);
    --bs-offcanvas-box-shadow: var(--calc-shadow-pop);
}

/* Nav pills / tabs. */
.nav-pills {
    --bs-nav-pills-border-radius: var(--calc-radius-sm);
    --bs-nav-pills-link-active-color: var(--calc-btn-ink);
    --bs-nav-pills-link-active-bg: var(--calc-btn-bg);
    --bs-nav-link-color: var(--calc-text-muted);
    --bs-nav-link-hover-color: var(--calc-primary-ink);
}

.nav-tabs {
    --bs-nav-tabs-border-color: var(--calc-border);
    --bs-nav-tabs-border-radius: var(--calc-radius-sm);
    --bs-nav-tabs-link-hover-border-color: var(--calc-border) var(--calc-border) var(--calc-border);
    --bs-nav-tabs-link-active-color: var(--calc-primary-ink);
    --bs-nav-tabs-link-active-bg: var(--calc-surface);
    --bs-nav-tabs-link-active-border-color: var(--calc-border) var(--calc-border) var(--calc-surface);
    --bs-nav-link-color: var(--calc-text-muted);
    --bs-nav-link-hover-color: var(--calc-primary-ink);
}

/* Tooltips. */
.tooltip {
    --bs-tooltip-bg: var(--calc-text);
    --bs-tooltip-color: var(--calc-bg);
    --bs-tooltip-border-radius: var(--calc-radius-sm);
    --bs-tooltip-font-size: 0.8125rem;
    --bs-tooltip-padding-x: 0.625rem;
    --bs-tooltip-padding-y: 0.375rem;
    --bs-tooltip-opacity: 1;
}

/* ==========================================================================
   11. Legacy / compatibility (admin, existing calculators)
   ========================================================================== */

/* HP 12c keypad keys (templates/financial/hp12c.html styles them itself):
   only non-visual touch behaviour lives here. */
.calc-btn {
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
}

.calc-icon {
    font-size: 1.25rem;
    vertical-align: middle;
}

.calc-icon-sm {
    font-size: 1.125rem;
    vertical-align: middle;
}

.calc-icon-btn {
    font-size: 1.125rem;
    margin-inline-end: 0.25rem;
}

.calc-hub-icon {
    font-size: 1.75rem;
    color: var(--calc-primary);
}

.calc-hub-card {
    color: var(--calc-text);
    border-radius: var(--calc-radius-lg);
    text-decoration: none;
    transition: box-shadow 0.15s ease, transform 0.15s ease, border-color 0.15s ease;
}

.calc-hub-card:hover,
.calc-hub-card:focus-visible {
    transform: translateY(-2px);
    border-color: var(--calc-primary);
    box-shadow: var(--calc-shadow-pop);
    color: var(--calc-text);
}

.calc-btn-brand {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.375rem;
}

.calc-dropdown-menu {
    background-color: var(--calc-surface);
    border-color: var(--calc-border);
}

.calc-dropdown-menu .dropdown-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.calc-lang-menu {
    max-height: min(60vh, 420px);
    overflow-y: auto;
}

.calc-flag {
    width: 1.25rem;
    height: auto;
    aspect-ratio: 4 / 3;
    flex-shrink: 0;
    object-fit: cover;
    border-radius: 2px;
    box-shadow: 0 0 0 1px var(--calc-border);
}

/* Menu item flags (MenuItem.flag, fragments/menu-icon): inside the tinted tiles, the sub-nav button and the drawer. */
.calc-page-icon .calc-flag,
.calc-page-icon-sm .calc-flag {
    width: 1.5rem;
}

.calc-page-icon:not(.calc-page-icon-sm) .calc-flag {
    width: 1.875rem;
}

.calc-flag.calc-nav-icon {
    width: 1.125rem;
}

.material-symbols-outlined.calc-nav-icon {
    font-size: 1.125rem;
    color: var(--calc-cat);
}

.calc-drawer-heading-icon {
    display: flex;
    align-items: center;
    gap: 0.375rem;
}

.calc-drawer-link > .calc-flag {
    width: 1.375rem;
}

.calc-version,
.calc-visit-count {
    white-space: nowrap;
    color: var(--calc-text-muted);
    font-size: 0.8125rem;
    font-variant-numeric: tabular-nums;
}

.calc-login-page {
    flex-direction: row;
    background-color: var(--calc-bg);
}

.calc-login-card {
    width: 100%;
    max-width: 24rem;
}

.calc-spin .btn,
.calc-date .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.calc-field-md {
    width: 100%;
    max-width: 100%;
}

.calc-field-date {
    width: 100%;
    max-width: 100%;
    /* Field, calendar button and weekday share one line; a long weekday is ellipsed, never wrapped. */
    flex-wrap: nowrap;
}

.calc-field-date > .form-control {
    width: calc(10ch + 1.5rem + 2px);
    flex: 0 0 auto;
    max-width: 100%;
}

.calc-date-weekday {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex: 1 1 0;
    min-width: 0;
    padding: 0 0.5rem;
    border: 1px solid var(--calc-border-strong);
    background-color: var(--calc-surface-alt);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Datepicker popup (form-inputs.ts): absolute under the date .input-group, never wider than the viewport. */
.calc-dp {
    position: absolute;
    top: 100%;
    inset-inline-start: 0;
    inset-inline-end: auto;
    z-index: var(--bs-dropdown-zindex, 1000);
    min-width: 17rem;
    max-width: calc(100vw - 32px);
    margin-top: 0.25rem;
    border: 1px solid var(--calc-border);
    border-radius: var(--calc-radius);
    background-color: var(--calc-surface);
    color: var(--calc-text);
    box-shadow: var(--calc-shadow-pop);
}

.calc-dp.show {
    display: block;
}

.calc-dp-title {
    flex: 1 1 auto;
    min-width: 0;
    text-align: center;
}

.calc-dp-grid {
    display: grid;
    grid-template-columns: repeat(7, minmax(0, 1fr));
    gap: 0.15rem;
    text-align: center;
}

.calc-dp-weekday {
    font-size: var(--calc-font-size-sm);
    font-weight: 600;
    color: var(--calc-text-muted);
    padding: 0.25rem 0;
}

.calc-dp-day {
    color: var(--calc-text);
    border: 1px solid transparent;
    border-radius: var(--calc-radius-sm);
    padding: 0.25rem 0;
}

.calc-dp-day:hover,
.calc-dp-day:focus-visible {
    background-color: var(--calc-primary-soft);
    color: var(--calc-primary-ink);
}

.calc-dp-day.today {
    border-color: var(--calc-border-strong);
    font-weight: 600;
}

.calc-dp-day.selected,
.calc-dp-day.selected:hover {
    background-color: var(--calc-btn-bg);
    border-color: var(--calc-btn-bg);
    color: var(--calc-btn-ink);
}

.calc-dp-nav {
    flex: 0 0 auto;
    min-width: 2rem;
    line-height: 1;
}

.calc-field-day {
    width: 100%;
    max-width: 100%;
}

/* ==========================================================================
   11a. Chinese calendar (miscellaneous/chinese-calendar.html)
   ========================================================================== */

:root,
[data-bs-theme="light"] {
    --calc-cc-red: #b91c1c;
    --calc-cc-red-soft: rgba(185, 28, 28, 0.08);
    --calc-cc-band-bg: #b91c1c;
    --calc-cc-band-ink: #ffffff;
    --calc-cc-gold: #b45309;
    --calc-cc-gold-soft: rgba(180, 83, 9, 0.12);
    --calc-cc-paper: #fffbf5;
    --calc-cc-el-wood: #16a34a;
    --calc-cc-el-wood-soft: rgba(22, 163, 74, 0.16);
    --calc-cc-el-fire: #dc2626;
    --calc-cc-el-fire-soft: rgba(220, 38, 38, 0.14);
    --calc-cc-el-earth: #b45309;
    --calc-cc-el-earth-soft: rgba(180, 83, 9, 0.16);
    --calc-cc-el-metal: #64748b;
    --calc-cc-el-metal-soft: rgba(100, 116, 139, 0.16);
    --calc-cc-el-water: #2563eb;
    --calc-cc-el-water-soft: rgba(37, 99, 235, 0.14);
}

[data-bs-theme="dark"] {
    --calc-cc-red: #f87171;
    --calc-cc-red-soft: rgba(248, 113, 113, 0.12);
    --calc-cc-band-bg: #991b1b;
    --calc-cc-band-ink: #fef2f2;
    --calc-cc-gold: #fbbf24;
    --calc-cc-gold-soft: rgba(251, 191, 36, 0.14);
    --calc-cc-paper: #1a1410;
    --calc-cc-el-wood: #4ade80;
    --calc-cc-el-wood-soft: rgba(74, 222, 128, 0.16);
    --calc-cc-el-fire: #f87171;
    --calc-cc-el-fire-soft: rgba(248, 113, 113, 0.16);
    --calc-cc-el-earth: #fbbf24;
    --calc-cc-el-earth-soft: rgba(251, 191, 36, 0.16);
    --calc-cc-el-metal: #cbd5e1;
    --calc-cc-el-metal-soft: rgba(203, 213, 225, 0.14);
    --calc-cc-el-water: #60a5fa;
    --calc-cc-el-water-soft: rgba(96, 165, 250, 0.16);
}

.calc-cc-el-wood { --calc-cc-el: var(--calc-cc-el-wood); --calc-cc-el-soft: var(--calc-cc-el-wood-soft); }
.calc-cc-el-fire { --calc-cc-el: var(--calc-cc-el-fire); --calc-cc-el-soft: var(--calc-cc-el-fire-soft); }
.calc-cc-el-earth { --calc-cc-el: var(--calc-cc-el-earth); --calc-cc-el-soft: var(--calc-cc-el-earth-soft); }
.calc-cc-el-metal { --calc-cc-el: var(--calc-cc-el-metal); --calc-cc-el-soft: var(--calc-cc-el-metal-soft); }
.calc-cc-el-water { --calc-cc-el: var(--calc-cc-el-water); --calc-cc-el-soft: var(--calc-cc-el-water-soft); }

/* Hanzi use the local CJK serif fonts when installed; no web font is downloaded. */
.calc-cc-hanzi {
    font-family: 'Noto Serif TC', 'Noto Serif CJK TC', 'Songti TC', 'PMingLiU', 'MingLiU', 'Noto Serif SC', serif;
    font-feature-settings: normal;
}

.calc-cc-tabs .nav-link {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
}

/* Almanac page (黃曆). */
.calc-cc-almanac {
    height: 100%;
    overflow: hidden;
    background-color: var(--calc-cc-paper);
    border: 1px solid var(--calc-border);
    border-top: 0;
    border-radius: var(--calc-radius-lg);
    box-shadow: var(--calc-shadow);
    text-align: center;
}

.calc-cc-almanac-band {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    padding: 0.625rem 1rem;
    background-color: var(--calc-cc-band-bg);
    color: var(--calc-cc-band-ink);
    font-size: var(--calc-font-size-lg);
    font-weight: 700;
    letter-spacing: 0.04em;
}

.calc-cc-almanac-body {
    padding: 1rem 1.25rem 1.25rem;
}

.calc-cc-almanac-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
}

.calc-cc-almanac-month {
    font-size: var(--calc-font-size-lg);
    font-weight: 700;
    text-transform: capitalize;
    color: var(--calc-cc-red);
}

.calc-cc-almanac-moon {
    flex-shrink: 0;
}

.calc-cc-almanac-day {
    margin-top: 0.25rem;
    font-size: 5.5rem;
    font-weight: 800;
    line-height: 1;
    letter-spacing: -0.03em;
    color: var(--calc-cc-red);
}

.calc-cc-almanac-weekday {
    margin-top: 0.25rem;
    font-size: var(--calc-font-size-lg);
    text-transform: capitalize;
    color: var(--calc-text-secondary);
}

.calc-cc-almanac-rule {
    margin: 1rem auto;
    width: 70%;
    border: 0;
    border-top: 2px dashed var(--calc-cc-gold);
    opacity: 1;
}

.calc-cc-almanac-lunar {
    font-size: 2.25rem;
    font-weight: 700;
    line-height: 1.2;
    color: var(--calc-text);
}

.calc-cc-almanac-lunar-text {
    margin-top: 0.25rem;
    color: var(--calc-text-secondary);
}

.calc-cc-almanac-meta {
    margin-top: 0.5rem;
    font-size: var(--calc-font-size-lg);
    color: var(--calc-cc-gold);
}

.calc-cc-almanac-tags {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 1rem;
}

.calc-cc-tag {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.25rem 0.75rem;
    border-radius: var(--calc-radius-pill);
    font-size: var(--calc-font-size-sm);
    font-weight: 600;
}

.calc-cc-tag-festival {
    background-color: var(--calc-cc-red-soft);
    color: var(--calc-cc-red);
}

.calc-cc-tag-term {
    background-color: var(--calc-cc-gold-soft);
    color: var(--calc-cc-gold);
}

.calc-cc-fact-glyph {
    font-size: 2.25rem;
    line-height: 1;
    color: var(--calc-cc-red);
}

.calc-cc-fact-text {
    font-size: 1.25rem;
}

/* Month grid. */
.calc-cc-grid-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.calc-cc-grid-title,
.calc-cc-section-title {
    margin: 0;
    font-size: 1.25rem;
    font-weight: 700;
}

.calc-cc-grid-title {
    text-transform: capitalize;
}

.calc-cc-grid-nav-label {
    text-transform: capitalize;
}

.calc-cc-month {
    width: 100%;
    table-layout: fixed;
    border-collapse: separate;
    border-spacing: 0.25rem;
}

.calc-cc-month th {
    padding: 0.25rem 0;
    font-size: 0.75rem;
    font-weight: 600;
    text-align: center;
    text-transform: uppercase;
    color: var(--calc-text-muted);
}

.calc-cc-cell {
    height: 4.5rem;
    padding: 0.375rem 0.25rem;
    vertical-align: top;
    text-align: center;
    background-color: var(--calc-surface-alt);
    border: 1px solid transparent;
    border-radius: var(--calc-radius-sm);
}

.calc-cc-cell-empty {
    background-color: transparent;
}

.calc-cc-cell-day {
    display: block;
    font-size: 1.125rem;
    font-weight: 700;
    line-height: 1.2;
    color: var(--calc-text);
}

.calc-cc-cell-weekend .calc-cc-cell-day {
    color: var(--calc-cc-red);
}

.calc-cc-cell-lunar {
    display: block;
    margin-top: 0.125rem;
    font-size: 0.8125rem;
    line-height: 1.2;
    color: var(--calc-text-muted);
}

.calc-cc-cell-month-start .calc-cc-cell-lunar {
    font-weight: 700;
    color: var(--calc-cc-gold);
}

.calc-cc-cell-mark {
    display: block;
    margin-top: 0.125rem;
    overflow: hidden;
    font-size: 0.75rem;
    font-weight: 700;
    line-height: 1.2;
    white-space: nowrap;
    text-overflow: ellipsis;
}

.calc-cc-cell-mark-festival {
    color: var(--calc-cc-red);
}

.calc-cc-cell-mark-term {
    color: var(--calc-success-ink);
}

.calc-cc-cell-out {
    opacity: 0.45;
}

.calc-cc-cell-selected {
    background-color: var(--calc-cat-soft, var(--calc-primary-soft));
    border-color: var(--calc-cat, var(--calc-primary));
    box-shadow: 0 0 0 1px var(--calc-cat, var(--calc-primary));
}

.calc-cc-legend {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 1.25rem;
    margin-top: 1rem;
    font-size: var(--calc-font-size-sm);
    color: var(--calc-text-secondary);
}

.calc-cc-legend li {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.calc-cc-legend-title {
    margin: 1rem 0 0;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--calc-text-secondary);
}

.calc-cc-swatch {
    display: inline-block;
    flex-shrink: 0;
    width: 0.875rem;
    height: 0.875rem;
    border-radius: 0.25rem;
    background-color: var(--calc-cc-el, var(--calc-border-strong));
}

.calc-cc-swatch-month-start { background-color: var(--calc-cc-gold); }
.calc-cc-swatch-festival { background-color: var(--calc-cc-red); }
.calc-cc-swatch-term { background-color: var(--calc-success-ink); }
.calc-cc-swatch-selected {
    background-color: var(--calc-cat-soft, var(--calc-primary-soft));
    box-shadow: inset 0 0 0 2px var(--calc-cat, var(--calc-primary));
}

/* Zodiac wheel (inline SVG, viewBox -120 -120 240 240). */
.calc-cc-wheel-figure {
    margin-top: 1rem;
    text-align: center;
}

.calc-cc-wheel {
    display: block;
    width: 100%;
    max-width: 24rem;
    height: auto;
    margin-inline: auto;
}

.calc-cc-wheel-sector path {
    fill: var(--calc-cc-el-soft);
    stroke: var(--calc-surface);
    stroke-width: 1.5;
    transition: fill 0.15s ease;
}

.calc-cc-wheel-sector text {
    fill: var(--calc-cc-el);
    font-family: 'Noto Serif TC', 'Noto Serif CJK TC', 'Songti TC', 'PMingLiU', 'MingLiU', 'Noto Serif SC', serif;
    font-weight: 700;
    pointer-events: none;
}

.calc-cc-wheel-branch {
    font-size: 0.9rem;
}

.calc-cc-wheel-stem {
    font-size: 1rem;
}

.calc-cc-wheel-sector:hover path {
    fill: var(--calc-cc-el);
    fill-opacity: 0.35;
}

.calc-cc-wheel-active path {
    fill: var(--calc-cc-el);
}

.calc-cc-wheel-active text {
    fill: var(--calc-surface);
}

.calc-cc-wheel-center {
    fill: var(--calc-cc-paper);
    stroke: var(--calc-cc-gold);
    stroke-width: 1.5;
}

.calc-cc-wheel-center-main {
    fill: var(--calc-cc-red);
    font-family: 'Noto Serif TC', 'Noto Serif CJK TC', 'Songti TC', 'PMingLiU', 'MingLiU', 'Noto Serif SC', serif;
    font-size: 1.5rem;
    font-weight: 800;
}

.calc-cc-wheel-center-sub {
    fill: var(--calc-text-muted);
    font-size: 0.75rem;
    font-weight: 600;
}

.calc-cc-wheel-caption {
    max-width: 36rem;
    margin: 0.75rem auto 0;
    font-size: var(--calc-font-size-sm);
    color: var(--calc-text-muted);
}

@media (max-width: 575.98px) {
    .calc-cc-almanac-day {
        font-size: 4.5rem;
    }

    .calc-cc-almanac-lunar {
        font-size: 1.875rem;
    }

    .calc-cc-month {
        border-spacing: 0.125rem;
    }

    .calc-cc-cell {
        height: 3.75rem;
        padding: 0.25rem 0.125rem;
    }

    .calc-cc-cell-day {
        font-size: 0.9375rem;
    }

    .calc-cc-cell-lunar {
        font-size: 0.6875rem;
    }

    .calc-cc-cell-mark {
        font-size: 0.625rem;
    }
}

/* ==========================================================================
   11b. Calculator components (health, labor, percentage)
   ========================================================================== */

/* Generic Chart.js canvases (calc-charts.ts). */
.calc-chart-canvas {
    position: relative;
    height: 18rem;
}

.calc-chart-canvas-round {
    max-width: 26rem;
    margin-inline: auto;
    height: 18rem;
}

/* Time inputs (HH:mm). */
.calc-field-time {
    width: 100%;
    max-width: 100%;
}

.calc-time-compact .form-control {
    min-width: 4.75rem;
}

.calc-time-compact .calc-field-time {
    width: 9rem;
}

/* Credit / debit amounts and table helpers. */
.calc-amount-credit {
    color: var(--calc-success-ink);
}

.calc-amount-debit {
    color: var(--calc-danger-ink);
}

.calc-row-total > * {
    font-weight: 600;
    border-top: 2px solid var(--calc-border-strong);
}

.calc-formula {
    font-family: var(--bs-font-monospace);
    background: var(--calc-surface-alt);
    border-radius: var(--calc-radius-sm);
    padding: 0.5rem 0.75rem;
    overflow-x: auto;
}

/* Progress bar tinted with the category color. */
.calc-progress .progress-bar {
    background-color: var(--calc-cat, var(--calc-primary));
}

/* Soft status badges. */
.calc-badge-ok,
.calc-badge-warn,
.calc-badge-info {
    display: inline-block;
    padding: 0.25em 0.6em;
    border-radius: var(--calc-radius-pill);
    font-size: 0.8125rem;
    font-weight: 600;
    line-height: 1.3;
}

.calc-badge-ok {
    background-color: var(--calc-success-soft);
    color: var(--calc-success-ink);
}

.calc-badge-warn {
    background-color: var(--calc-warning-soft);
    color: var(--calc-warning-ink);
}

.calc-badge-info {
    background-color: var(--calc-primary-soft);
    color: var(--calc-primary-ink);
}

/* Cycle calendar (fertile window). */
.calc-cycle-months {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
}

@media (min-width: 768px) {
    .calc-cycle-months {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (min-width: 992px) {
    .calc-cycle-months {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
}

.calc-cycle-month {
    padding: 0.75rem;
    background-color: var(--calc-surface);
    border: 1px solid var(--calc-border);
    border-radius: var(--calc-radius);
    box-shadow: var(--calc-shadow-sm);
}

.calc-cycle-month-title {
    margin: 0 0 0.5rem;
    font-size: 1rem;
    font-weight: 600;
    text-align: center;
}

.calc-cycle-cal {
    width: 100%;
    table-layout: fixed;
    border-collapse: separate;
    border-spacing: 0.125rem;
}

.calc-cycle-cal th {
    padding: 0.25rem 0;
    font-size: 0.75rem;
    font-weight: 600;
    text-align: center;
    color: var(--calc-text-muted);
}

.calc-cycle-day {
    padding: 0.375rem 0;
    text-align: center;
    font-size: 0.875rem;
    font-variant-numeric: tabular-nums;
    border-radius: var(--calc-radius-sm);
    color: var(--calc-text);
}

.calc-cycle-day.is-outside {
    color: var(--calc-text-muted);
    opacity: 0.45;
}

.calc-cycle-day.is-period {
    background-color: var(--calc-danger-soft);
    color: var(--calc-danger-ink);
}

.calc-cycle-day.is-fertile {
    background-color: var(--calc-success-soft);
    color: var(--calc-success-ink);
}

.calc-cycle-day.is-ovulation {
    background-color: var(--calc-success);
    color: var(--bs-white);
    font-weight: 700;
}

.calc-cycle-day.is-today {
    outline: 2px solid var(--calc-primary);
    outline-offset: -2px;
}

.calc-cycle-legend {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 1.25rem;
    margin: 1rem 0 0;
    padding: 0;
    list-style: none;
    font-size: 0.875rem;
    color: var(--calc-text-muted);
}

.calc-cycle-legend > * {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.calc-cycle-swatch {
    display: inline-block;
    flex: 0 0 auto;
    width: 1rem;
    height: 1rem;
    border-radius: 0.25rem;
    border: 1px solid var(--calc-border);
}

.calc-cycle-swatch.is-period {
    background-color: var(--calc-danger-soft);
    border-color: var(--calc-danger);
}

.calc-cycle-swatch.is-fertile {
    background-color: var(--calc-success-soft);
    border-color: var(--calc-success);
}

.calc-cycle-swatch.is-ovulation {
    background-color: var(--calc-success);
    border-color: var(--calc-success);
}

.calc-cycle-swatch.is-today {
    background-color: transparent;
    border: 2px solid var(--calc-primary);
}

/* Timesheet table (wrap in .table-responsive). */
.calc-timesheet td,
.calc-timesheet th {
    vertical-align: middle;
    padding: 0.375rem 0.5rem;
    white-space: nowrap;
}

/* Percentage tabs. */
.calc-tab-pills {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-block-end: 1rem;
}

/* ==========================================================================
   11c. Unit converter (scientific/unit-converter.html)
   ========================================================================== */

/* Category tabs: a 3-column tile grid (icon above the label) on phones, icon pills from 768px. */
.calc-unit-tabs {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.5rem;
    margin: 0;
    padding: 0;
    list-style: none;
}

.calc-unit-tab {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.25rem;
    height: 100%;
    min-height: 4.25rem;
    padding: 0.5rem 0.375rem;
    border: 1px solid var(--calc-border);
    border-radius: var(--calc-radius-sm);
    background-color: var(--calc-surface);
    color: var(--calc-text-muted);
    font-size: 0.8125rem;
    font-weight: 500;
    line-height: 1.2;
    text-align: center;
    text-decoration: none;
    overflow-wrap: anywhere;
    transition: border-color 0.15s ease, color 0.15s ease, background-color 0.15s ease;
}

.calc-unit-tab-icon {
    font-size: 1.5rem;
    line-height: 1;
}

.calc-unit-tab:hover,
.calc-unit-tab:focus-visible {
    border-color: var(--calc-primary);
    color: var(--calc-primary-ink);
}

.calc-unit-tab:focus-visible {
    outline: 0;
    box-shadow: 0 0 0 0.25rem var(--calc-focus-ring);
}

.calc-unit-tab.active,
.calc-unit-tab.active:hover,
.calc-unit-tab.active:focus-visible {
    border-color: var(--calc-btn-bg);
    background-color: var(--calc-btn-bg);
    color: var(--calc-btn-ink);
}

@media (min-width: 768px) {
    .calc-unit-tabs {
        display: flex;
        flex-wrap: wrap;
    }

    .calc-unit-tab {
        flex-direction: row;
        gap: 0.375rem;
        min-height: 0;
        padding: 0.5rem 0.875rem;
        font-size: 0.9375rem;
    }

    .calc-unit-tab-icon {
        font-size: 1.25rem;
    }
}

/* Country flag inside a tile (international severance tabs). */
.calc-flag.calc-flag-tab {
    width: 1.75rem;
}

@media (min-width: 768px) {
    .calc-flag.calc-flag-tab {
        width: 1.375rem;
    }
}

/* Swap button inside the "Unit" field (selectFieldSwap, shown by unit-converter.ts). */
.calc-unit-swap {
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

/* Equivalence table below the result. */
.calc-unit-equivalences {
    margin-block-start: 1.5rem;
}

/* ===== 11b. Time zone converter (time-zones.ts) ===== */

.calc-tz-section-title {
    margin-block-end: 0.75rem;
}

.calc-tz-main-place {
    font-size: var(--calc-font-size-lg);
    font-weight: 600;
    overflow-wrap: anywhere;
}

.calc-tz-main-meta,
.calc-tz-card-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem;
    color: var(--calc-text-secondary);
    font-size: var(--calc-font-size-sm);
}

.calc-tz-id {
    color: var(--calc-text-muted);
    font-size: 0.75rem;
    overflow-wrap: anywhere;
}

.calc-tz-main-time {
    font-size: 2.5rem;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
    line-height: 1.2;
}

.calc-tz-controls {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-end;
    gap: 0.75rem;
}

.calc-tz-picker {
    position: relative;
    flex: 1 1 18rem;
    min-width: 0;
}

.calc-tz-results {
    position: absolute;
    inset-inline: 0;
    top: 100%;
    z-index: 1050;
    max-height: 20rem;
    margin: 0.25rem 0 0;
    overflow-y: auto;
    background-color: var(--calc-surface);
    border: 1px solid var(--calc-border);
    border-radius: var(--calc-radius);
    box-shadow: var(--calc-shadow-pop);
}

.calc-tz-results[hidden] {
    display: none;
}

.calc-tz-result,
.calc-tz-result-empty {
    display: flex;
    flex-direction: column;
    padding: 0.5rem 0.75rem;
}

.calc-tz-result {
    cursor: pointer;
}

.calc-tz-result small,
.calc-tz-result-empty {
    color: var(--calc-text-muted);
    font-size: var(--calc-font-size-sm);
}

.calc-tz-result:hover,
.calc-tz-result.is-active {
    background-color: var(--calc-primary-soft);
}

.calc-tz-timeline {
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: 0.5rem;
    margin-block-end: 0.5rem;
}

.calc-tz-track {
    position: relative;
    display: flex;
    gap: 0.25rem;
    min-width: 0;
    padding-block: 0.75rem;
    overflow-x: auto;
    scroll-snap-type: x proximity;
    scrollbar-width: thin;
    direction: ltr;
}

.calc-tz-track:focus-visible {
    outline: 2px solid var(--calc-focus-ring);
    outline-offset: 2px;
}

.calc-tz-slot {
    position: relative;
    flex: 0 0 auto;
    min-inline-size: 4.5rem;
    white-space: nowrap;
    min-height: 3.5rem;
    padding: 0.25rem 0.5rem;
    border: 1px solid var(--calc-border);
    border-radius: var(--calc-radius-sm);
    color: var(--calc-text);
    font-size: var(--calc-font-size-sm);
    font-variant-numeric: tabular-nums;
    scroll-snap-align: center;
    cursor: pointer;
}

.calc-tz-slot.is-day {
    background-color: var(--calc-surface);
}

.calc-tz-slot.is-twilight {
    background-color: color-mix(in srgb, var(--calc-warning) 12%, var(--calc-surface));
}

.calc-tz-slot.is-night {
    background-color: color-mix(in srgb, var(--calc-primary) 16%, var(--calc-surface-alt));
}

.calc-tz-slot:not(.is-hour) {
    color: var(--calc-text-muted);
}

.calc-tz-slot.is-hour {
    font-weight: 600;
}

.calc-tz-slot.is-selected {
    background-color: var(--calc-primary);
    border-color: var(--calc-primary);
    color: var(--calc-btn-ink);
    box-shadow: var(--calc-shadow);
}

.calc-tz-slot.is-now::after {
    content: "";
    position: absolute;
    inset-block-start: 0.25rem;
    inset-inline-start: 50%;
    width: 0.375rem;
    height: 0.375rem;
    margin-inline-start: -0.1875rem;
    border-radius: 50%;
    background-color: var(--calc-danger);
}

.calc-tz-slot:focus-visible {
    outline: 2px solid var(--calc-focus-ring);
    outline-offset: 2px;
}

.calc-tz-add {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-end;
    gap: 0.75rem;
}

.calc-tz-count {
    padding-block-end: 0.5rem;
    color: var(--calc-text-muted);
    font-size: var(--calc-font-size-sm);
    font-variant-numeric: tabular-nums;
}

.calc-tz-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(15rem, 1fr));
    gap: 1rem;
}

.calc-tz-card {
    min-width: 0;
    padding: 1rem;
    background-color: var(--calc-surface);
    border: 1px solid var(--calc-border);
    border-inline-start: 0.3rem solid var(--calc-primary);
    border-radius: var(--calc-radius-lg);
    box-shadow: var(--calc-shadow-sm);
}

.calc-tz-card.is-day {
    border-inline-start-color: var(--calc-warning);
}

.calc-tz-card.is-twilight {
    border-inline-start-color: color-mix(in srgb, var(--calc-warning) 50%, var(--calc-primary));
}

.calc-tz-card.is-night {
    border-inline-start-color: var(--calc-primary);
}

.calc-tz-card-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 0.5rem;
}

.calc-tz-card-heading {
    min-width: 0;
}

.calc-tz-card-title {
    margin: 0;
    font-size: var(--calc-font-size-base);
    font-weight: 600;
    overflow-wrap: anywhere;
}

.calc-tz-card-actions {
    display: flex;
    flex-shrink: 0;
    gap: 0.25rem;
}

.calc-tz-card-time {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-block-start: 0.5rem;
    font-size: 2rem;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
    line-height: 1.2;
}

.calc-tz-period-icon {
    color: var(--calc-text-muted);
}

.calc-tz-card-date {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem;
    margin-block-end: 0.5rem;
    color: var(--calc-text-secondary);
    font-size: var(--calc-font-size-sm);
}

.calc-tz-badge {
    display: inline-block;
    padding: 0.125rem 0.5rem;
    border-radius: var(--calc-radius-pill);
    background-color: var(--calc-surface-alt);
    font-size: 0.75rem;
    font-weight: 600;
    line-height: 1.4;
}

.calc-tz-badge[hidden] {
    display: none;
}

.calc-tz-badge-shift {
    background-color: var(--calc-warning-soft);
    color: var(--calc-warning-ink);
}

.calc-tz-badge-dst {
    background-color: var(--calc-success-soft);
    color: var(--calc-success-ink);
}

@media (prefers-reduced-motion: reduce) {
    .calc-tz-track {
        scroll-behavior: auto;
    }
}

/* ==========================================================================
   12. Responsive, accessibility, print
   ========================================================================== */

@media (max-width: 575.98px) {
    /* Keep the top bar on one row at 360px: menu, brand, search, language, theme. */
    .calc-topbar-inner {
        gap: 0.5rem;
        padding-inline: 0.75rem;
    }

    .calc-topbar-actions {
        gap: 0;
    }

    .calc-topbar-actions .dropdown-toggle::after {
        display: none;
    }

    .calc-topbar-actions .btn-sm {
        --bs-btn-padding-x: 0.5rem;
    }

    .calc-topbar .calc-brand {
        gap: 0.375rem;
        font-size: 1rem;
    }

    .calc-page-title {
        font-size: 1.5rem;
    }

    .calc-hero {
        padding: 2rem 0.5rem 1.5rem;
    }

    .calc-hero-title {
        font-size: 1.75rem;
    }

    .calc-result,
    .calc-form-card > .card-body,
    .calc-form-card:not(.card) {
        padding: 1.25rem;
    }

    .calc-result-value,
    .calc-result-value-primary {
        font-size: 1.5rem;
    }

    .calc-footer {
        padding-inline: 1rem;
    }
}

@media (max-width: 359.98px) {
    .calc-topbar-inner .calc-brand-name {
        display: none;
    }
}

@media (max-width: 991.98px) {
    .calc-footer {
        padding-bottom: 2rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        transition-duration: 0.01ms !important;
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        scroll-behavior: auto !important;
    }

    .calc-tool-card:hover,
    .calc-tool-card:focus-visible,
    .calc-hub-card:hover,
    .calc-hub-card:focus-visible {
        transform: none;
    }
}

@media print {
    .calc-topbar,
    .calc-footer,
    .calc-consent,
    .calc-drawer,
    .calc-skip-link {
        display: none !important;
    }

    body {
        background: #fff;
        color: #000;
    }
}

.destiny-matrix-chart {
    direction: ltr;
    width: 100%;
    max-width: 40rem;
    margin-inline: auto;
    margin-block: 1rem 1.5rem;
}

.destiny-matrix-chart svg {
    display: block;
    width: 100%;
    height: auto;
    overflow: visible;
}

.destiny-matrix-spoke {
    fill: none;
    stroke: #d1d5db;
    stroke-width: 2;
}

.destiny-matrix-node circle {
    fill: var(--bs-body-bg);
    stroke: #2563eb;
    stroke-width: 2.5;
}

.destiny-matrix-node-center circle {
    fill: #2563eb;
    stroke: #2563eb;
}

.destiny-matrix-letter,
.destiny-matrix-name {
    fill: var(--bs-body-color);
    text-anchor: middle;
    font-size: 0.65rem;
}

.destiny-matrix-num {
    fill: var(--bs-body-color);
    text-anchor: middle;
    font-size: 1rem;
    font-weight: 700;
}

.destiny-matrix-node-center .destiny-matrix-letter,
.destiny-matrix-node-center .destiny-matrix-name,
.destiny-matrix-node-center .destiny-matrix-num {
    fill: #fff;
}

.destiny-matrix-section {
    margin-top: 1.5rem;
}

.destiny-matrix-section h3 {
    margin-bottom: 0.75rem;
    font-size: var(--calc-font-size-lg, 1.125rem);
}

.destiny-matrix-disclaimer,
.destiny-matrix-callout p {
    color: var(--bs-body-color);
}

.destiny-matrix-callout {
    margin-top: 1.5rem;
}

/* Country combobox (fragments/form-inputs :: countrySelect, static/ts/country-combobox.ts). The native
   grouped select works without JavaScript; the script hides it and renders an input + listbox with flags. */
.calc-fields .calc-field > .calc-field-message {
    grid-row: 3;
}

.calc-country-missing {
    margin-block: 0.375rem 0;
}

.calc-country-combobox {
    position: relative;
    width: 100%;
}

.calc-country-combobox-control {
    position: relative;
    display: flex;
    align-items: center;
}

.calc-country-combobox-input {
    padding-inline-end: 2.5rem;
}

.calc-country-combobox-has-flag .calc-country-combobox-input {
    padding-inline-start: 2.5rem;
}

.calc-country-combobox-flag {
    position: absolute;
    inset-inline-start: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    pointer-events: none;
}

.calc-country-combobox-toggle {
    position: absolute;
    inset-inline-end: 0.25rem;
    top: 50%;
    transform: translateY(-50%);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.25rem;
    border: 0;
    border-radius: var(--calc-radius-sm);
    background: transparent;
    color: var(--calc-text-muted);
    cursor: pointer;
}

.calc-country-combobox-toggle:hover {
    color: var(--calc-text);
    background: var(--calc-surface-alt);
}

.calc-country-combobox-toggle .calc-icon {
    transition: transform 0.15s ease;
}

.calc-country-combobox-open .calc-country-combobox-toggle .calc-icon {
    transform: rotate(180deg);
}

.calc-country-combobox-popup {
    position: absolute;
    inset-inline: 0;
    top: calc(100% + 0.25rem);
    z-index: 1060;
    max-height: 20rem;
    overflow-y: auto;
    overscroll-behavior: contain;
    background: var(--calc-surface);
    color: var(--calc-text);
    border: 1px solid var(--calc-border);
    border-radius: var(--calc-radius);
    box-shadow: var(--calc-shadow-pop);
}

.calc-country-combobox-popup[hidden] {
    display: none;
}

.calc-country-combobox-list,
.calc-country-combobox-list ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

.calc-country-combobox-list {
    padding-block: 0.25rem;
}

.calc-country-combobox-group[hidden],
.calc-country-combobox-option[hidden] {
    display: none;
}

.calc-country-combobox-group-label {
    position: sticky;
    top: 0;
    padding: 0.375rem 0.75rem 0.25rem;
    background: var(--calc-surface);
    color: var(--calc-text-muted);
    font-size: var(--calc-font-size-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.calc-country-combobox-option {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.375rem 0.75rem;
    cursor: pointer;
}

.calc-country-combobox-option[aria-selected="true"] {
    font-weight: 600;
    color: var(--calc-primary-ink);
}

.calc-country-combobox-option.calc-country-combobox-active {
    background: var(--calc-primary-soft);
}

.calc-country-combobox-name {
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.calc-country-combobox-empty {
    padding: 0.75rem;
    color: var(--calc-text-muted);
}

/* Holiday month calendar (templates/date-time/holidays.html): a 7-column month grid with holiday chips, an agenda
   list below 576px, the year table and the legend. Colors come from the tokens, so dark mode follows them. */
.calc-month-head {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem 1rem;
    margin-bottom: 0.75rem;
}

.calc-month-nav {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.375rem;
}

.calc-month-nav .btn,
.calc-year-head .btn {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
}

.calc-month-title {
    margin: 0;
    font-size: 1.25rem;
    font-weight: 700;
}

.calc-month-grid {
    display: grid;
    grid-template-columns: repeat(7, minmax(0, 1fr));
    overflow: hidden;
    background-color: var(--calc-surface);
    border: 1px solid var(--calc-border);
    border-radius: var(--calc-radius);
}

.calc-month-row {
    display: contents;
}

.calc-month-weekday {
    padding: 0.375rem 0.25rem;
    overflow: hidden;
    font-size: 0.75rem;
    font-weight: 600;
    text-align: center;
    text-overflow: ellipsis;
    text-transform: uppercase;
    white-space: nowrap;
    color: var(--calc-text-muted);
    border-bottom: 1px solid var(--calc-border);
}

.calc-month-cell {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    min-width: 0;
    min-height: 6.5rem;
    padding: 0.375rem;
    border-bottom: 1px solid var(--calc-border);
    border-inline-end: 1px solid var(--calc-border);
}

.calc-month-row > .calc-month-cell:last-child {
    border-inline-end: 0;
}

.calc-month-row:last-child > .calc-month-cell {
    border-bottom: 0;
}

.calc-month-cell.is-weekend {
    background-color: var(--calc-surface-alt);
}

.calc-month-cell.is-out .calc-month-day {
    color: var(--calc-text-muted);
    opacity: 0.6;
}

.calc-month-cell.is-out .calc-month-chips {
    opacity: 0.55;
}

.calc-month-cell.is-today {
    box-shadow: inset 0 0 0 2px var(--calc-primary);
}

.calc-month-day {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex: 0 0 auto;
    width: 1.75rem;
    height: 1.75rem;
    font-size: 0.875rem;
    font-weight: 600;
    border-radius: 50%;
    color: var(--calc-text);
}

.calc-month-cell.is-today .calc-month-day {
    background-color: var(--calc-primary);
    color: var(--bs-white);
    opacity: 1;
}

.calc-month-chips {
    display: flex;
    flex-direction: column;
    gap: 0.125rem;
    min-width: 0;
    margin: 0;
    padding: 0;
    list-style: none;
}

.calc-holiday-chip {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    min-width: 0;
    padding: 0.0625rem 0.375rem;
    font-size: 0.75rem;
    font-weight: 600;
    line-height: 1.4;
    border: 1px solid transparent;
    border-radius: 0.25rem;
}

.calc-holiday-chip-text {
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.calc-holiday-chip-icon {
    flex: 0 0 auto;
    font-size: 0.875rem;
}

.calc-holiday-chip-national {
    background-color: var(--calc-primary);
    border-color: var(--calc-primary);
    color: var(--bs-white);
}

.calc-holiday-chip-regional {
    background-color: var(--bs-info-bg-subtle);
    border-color: var(--bs-info-border-subtle);
    color: var(--bs-info-text-emphasis);
}

.calc-holiday-chip-observed {
    background-color: var(--bs-secondary-bg-subtle);
    border-color: var(--bs-secondary-border-subtle);
    color: var(--bs-secondary-text-emphasis);
}

.calc-holiday-chip-optional {
    background-color: transparent;
    border: 1px dashed var(--calc-border-strong);
    color: var(--calc-text-secondary);
}

.calc-holiday-chip-override {
    background-color: var(--calc-warning-soft);
    border-color: var(--calc-warning-soft);
    color: var(--calc-warning-ink);
    font-weight: 500;
}

/* Kind chip in the year table: inline, and its text may wrap. */
.calc-holiday-kind {
    display: inline-flex;
    white-space: normal;
}

.calc-holiday-expected-icon {
    font-size: 1rem;
    vertical-align: middle;
    color: var(--calc-warning-ink);
}

.calc-holiday-countdown-name {
    font-size: var(--calc-font-size-lg);
    line-height: 1.35;
}

/* Agenda of the month: shown only below 576px, where the grid would be too narrow. */
.calc-month-agenda {
    display: none;
    margin: 0;
    padding: 0;
    list-style: none;
}

.calc-month-agenda-item {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--calc-border);
}

.calc-month-agenda-item:last-child {
    border-bottom: 0;
}

.calc-month-agenda-date {
    display: flex;
    flex: 0 0 4.5rem;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.calc-month-agenda-day {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2rem;
    height: 2rem;
    font-size: 1rem;
    font-weight: 700;
    border-radius: 50%;
}

.calc-month-agenda-item.is-today .calc-month-agenda-day {
    background-color: var(--calc-primary);
    color: var(--bs-white);
}

.calc-month-agenda-weekday {
    font-size: 0.75rem;
    color: var(--calc-text-muted);
}

.calc-month-agenda .calc-month-chips {
    flex: 1 1 auto;
    gap: 0.25rem;
}

.calc-month-agenda .calc-holiday-chip-text {
    white-space: normal;
}

.calc-month-empty {
    margin-top: 0.75rem;
}

@media (max-width: 575.98px) {
    .calc-month-grid {
        display: none;
    }

    .calc-month-agenda {
        display: block;
    }

    .calc-month-nav-compact .calc-month-nav-label {
        display: none;
    }
}

.calc-month-legend-title {
    margin: 1rem 0 0.25rem;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--calc-text-secondary);
}

.calc-month-legend {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 1.25rem;
    margin: 0;
    padding: 0;
    list-style: none;
    font-size: var(--calc-font-size-sm);
    color: var(--calc-text-secondary);
}

.calc-month-legend li {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.calc-holiday-swatch {
    display: inline-block;
    width: 1.5rem;
    height: 0.875rem;
    padding: 0;
}

.calc-month-swatch {
    display: inline-block;
    flex: 0 0 auto;
    width: 1rem;
    height: 1rem;
    border: 1px solid var(--calc-border);
    border-radius: 0.25rem;
}

.calc-month-swatch-today {
    box-shadow: inset 0 0 0 2px var(--calc-primary);
}

.calc-month-swatch-weekend {
    background-color: var(--calc-surface-alt);
}

.calc-year-head {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem 0.75rem;
    margin-bottom: 0.75rem;
}

.calc-holiday-past > td {
    color: var(--calc-text-muted);
}

.calc-holiday-today > td {
    font-weight: 700;
}