:root {
    --dt-bg: #f4f6f8;
    --dt-card: #ffffff;
    --dt-text: #1c2430;
    --dt-muted: #5a6878;
    --dt-border: #d7dee6;
    --dt-primary: #1b5f8a;
    --dt-primary-dark: #144a6c;
    --dt-focus: #0f3d5a;
    --dt-accent: #9a3412;
    --dt-ok: #166534;
    --dt-danger: #b42318;
    --dt-night: #1e293b;
    --dt-work: #dbeafe;
    --dt-evening: #ffedd5;
    --dt-shadow: 0 1px 2px rgba(16, 24, 40, 0.06);
}

html {
    scroll-behavior: smooth;
}

body {
    background: var(--dt-bg);
    color: var(--dt-text);
    font-family: "Segoe UI", system-ui, -apple-system, Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.55;
}

.skip-link {
    position: absolute;
    left: -999px;
    top: 0;
    background: var(--dt-primary);
    color: #fff;
    padding: 0.5rem 1rem;
    z-index: 2000;
}

.skip-link:focus {
    left: 0.75rem;
    top: 0.75rem;
}

a {
    color: var(--dt-primary);
}

a:hover {
    color: var(--dt-primary-dark);
}

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

.site-header {
    background: var(--dt-card);
    border-bottom: 1px solid var(--dt-border);
}

.navbar-brand {
    font-weight: 700;
    color: var(--dt-text);
    letter-spacing: -0.02em;
}

.brand-mark {
    color: var(--dt-primary);
    margin-right: 0.15rem;
}

.navbar-nav .nav-link {
    color: var(--dt-text);
    font-weight: 500;
}

.navbar-nav .nav-link.active,
.navbar-nav .nav-link:hover {
    color: var(--dt-primary);
}

.site-main {
    min-height: 65vh;
}

.page-title {
    font-size: clamp(1.6rem, 2vw + 1rem, 2.15rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    margin-bottom: 0.35rem;
}

.lead-tight {
    color: var(--dt-muted);
    max-width: 42rem;
}

.tool-card,
.clock-card,
.result-card,
.content-card {
    background: var(--dt-card);
    border: 1px solid var(--dt-border);
    border-radius: 0.85rem;
    box-shadow: var(--dt-shadow);
    padding: 1.25rem;
}

.result-card {
    padding: 1.5rem;
}

.result-value {
    font-size: clamp(1.8rem, 3vw + 1rem, 2.75rem);
    font-weight: 700;
    letter-spacing: -0.04em;
    line-height: 1.15;
}

.clock-time {
    font-variant-numeric: tabular-nums;
    font-size: 1.85rem;
    font-weight: 700;
    letter-spacing: -0.03em;
}

.clock-meta {
    color: var(--dt-muted);
    font-size: 0.92rem;
}

.local-clock {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem 1.5rem;
    align-items: baseline;
}

.section-title {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.site-footer {
    background: #eef2f5;
    border-top: 1px solid var(--dt-border);
    color: var(--dt-text);
}

.footer-brand {
    font-weight: 700;
}

.footer-heading {
    font-weight: 700;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--dt-muted);
}

.footer-links a {
    color: var(--dt-text);
    text-decoration: none;
}

.footer-links a:hover,
.footer-links a:focus {
    text-decoration: underline;
}

.footer-copy {
    color: var(--dt-muted);
    font-size: 0.9rem;
}

.btn-primary {
    background: var(--dt-primary);
    border-color: var(--dt-primary);
}

.btn-primary:hover,
.btn-primary:focus {
    background: var(--dt-primary-dark);
    border-color: var(--dt-primary-dark);
}

.btn-outline-primary {
    color: var(--dt-primary);
    border-color: var(--dt-primary);
}

.form-label {
    font-weight: 600;
}

.form-control:focus,
.form-select:focus {
    border-color: var(--dt-primary);
    box-shadow: 0 0 0 0.2rem rgba(27, 95, 138, 0.18);
}

.search-wrap {
    position: relative;
}

.search-results {
    position: absolute;
    z-index: 20;
    left: 0;
    right: 0;
    top: calc(100% + 0.25rem);
    background: var(--dt-card);
    border: 1px solid var(--dt-border);
    border-radius: 0.7rem;
    box-shadow: var(--dt-shadow);
    max-height: 18rem;
    overflow: auto;
}

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

.search-option {
    display: block;
    width: 100%;
    text-align: left;
    border: 0;
    background: transparent;
    padding: 0.65rem 0.9rem;
    color: inherit;
    text-decoration: none;
}

.search-option[aria-selected="true"],
.search-option:hover,
.search-option:focus {
    background: #eef5fa;
}

.timeline {
    display: grid;
    grid-template-columns: repeat(24, minmax(0, 1fr));
    gap: 2px;
    margin-top: 0.5rem;
}

.timeline span {
    display: block;
    height: 1.1rem;
    border-radius: 2px;
    background: #e2e8f0;
}

.timeline span.is-now {
    background: var(--dt-primary);
}

.timeline span.work {
    background: #93c5fd;
}

.timeline span.evening {
    background: #fdba74;
}

.timeline span.night {
    background: #64748b;
}

.timeline-legend {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    font-size: 0.85rem;
    color: var(--dt-muted);
    margin-top: 0.5rem;
}

.compare-grid {
    display: grid;
    grid-template-columns: 8rem repeat(24, minmax(8px, 1fr));
    gap: 2px;
    align-items: center;
    overflow-x: auto;
    font-size: 0.75rem;
}

.compare-grid .cell {
    height: 1.35rem;
    border-radius: 2px;
    background: #e2e8f0;
}

.compare-grid .cell.work { background: #93c5fd; }
.compare-grid .cell.evening { background: #fdba74; }
.compare-grid .cell.night { background: #64748b; }
.compare-grid .cell.is-now { outline: 2px solid var(--dt-primary); }

.calendar-table th,
.calendar-table td {
    text-align: center;
    width: 14.28%;
}

.calendar-table td.today {
    background: #e8f1f8;
    font-weight: 700;
}

.calendar-table .muted {
    color: var(--dt-muted);
}

.faq-item + .faq-item {
    border-top: 1px solid var(--dt-border);
}

.breadcrumb-wrap .breadcrumb {
    background: transparent;
    padding: 0;
}

.admin-shell {
    background: #f4f6f8;
}

.table-actions {
    white-space: nowrap;
}

.badge-dst {
    background: #ecfccb;
    color: #3f6212;
}

.copy-box {
    font-family: ui-monospace, Consolas, monospace;
    font-size: 0.92rem;
    white-space: pre-wrap;
}

.status-pill {
    display: inline-block;
    padding: 0.15rem 0.5rem;
    border-radius: 999px;
    font-size: 0.8rem;
    border: 1px solid var(--dt-border);
}

.status-pill.work { background: var(--dt-work); }
.status-pill.evening { background: var(--dt-evening); }
.status-pill.night { background: #e2e8f0; }

@media print {
    .site-header,
    .site-footer,
    .no-print,
    .navbar {
        display: none !important;
    }
    .site-main {
        min-height: 0;
    }
    .tool-card,
    .content-card {
        box-shadow: none;
        border-color: #ccc;
    }
}

.pillar-clock {
    min-height: 18rem;
}

.pillar-clock .result-value {
    min-height: 1.2em;
    font-variant-numeric: tabular-nums;
}

.site-logo {
    height: 40px;
    width: auto;
    max-width: 160px;
}

.site-announce {
    background: var(--site-primary, var(--dt-primary));
    color: #fff;
    text-align: center;
    padding: 0.4rem 1rem;
    font-size: 0.95rem;
}

.share-box .btn {
    min-height: 2.25rem;
}

.share-status:empty {
    display: none;
}

.admin-shell .navbar-nav .dropdown-menu {
    max-height: 70vh;
    overflow: auto;
}

@media (max-width: 575.98px) {
    .pillar-clock {
        min-height: 20rem;
    }
}
    .tool-card,
    .result-card {
        padding: 1rem;
    }
}