:root {
    --color-primary: #1a365d;
    --color-primary-light: #2a4a7f;
    --color-accent: #c9a849;
    --color-accent-light: #f5efd6;
    --color-bg: #ffffff;
    --color-sidebar: #f7f8fa;
    --color-border: #e2e8f0;
    --color-text: #2d3748;
    --color-text-light: #718096;
    --color-success: #38a169;
    --color-danger: #e53e3e;
    --color-info: #3182ce;
    --sidebar-width: 240px;
    --nav-height: 56px;
    --max-content: 900px;
    --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-padding-top: calc(var(--nav-height) + 1rem); }

body {
    margin: 0;
    font-family: var(--font-stack);
    font-size: 15px;
    line-height: 1.65;
    color: var(--color-text);
    background: var(--color-bg);
}

/* ── Top Navigation ── */
.top-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    background: var(--color-primary);
    color: #fff;
    display: flex;
    align-items: center;
    padding: 0 1.5rem;
    z-index: 100;
    box-shadow: 0 2px 4px rgba(0,0,0,0.15);
}

.top-nav .site-title {
    font-size: 1.05rem;
    font-weight: 600;
    white-space: nowrap;
    margin-right: 2rem;
    color: var(--color-accent);
    text-decoration: none;
}

.top-nav .nav-links {
    display: flex;
    gap: 0.15rem;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.top-nav .nav-links a {
    color: rgba(255,255,255,0.8);
    text-decoration: none;
    font-size: 0.82rem;
    padding: 0.35rem 0.6rem;
    border-radius: 4px;
    white-space: nowrap;
    transition: background 0.15s, color 0.15s;
}

.top-nav .nav-links a:hover { background: var(--color-primary-light); color: #fff; }
.top-nav .nav-links a.active { background: var(--color-accent); color: var(--color-primary); font-weight: 600; }

/* ── Layout ── */
.page-wrapper {
    display: flex;
    margin-top: var(--nav-height);
    min-height: calc(100vh - var(--nav-height));
}

/* ── Sidebar ── */
.sidebar {
    width: var(--sidebar-width);
    min-width: var(--sidebar-width);
    background: var(--color-sidebar);
    border-right: 1px solid var(--color-border);
    padding: 1.5rem 1rem;
    position: sticky;
    top: var(--nav-height);
    height: calc(100vh - var(--nav-height));
    overflow-y: auto;
}

.sidebar h4 {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-text-light);
    margin: 1.2rem 0 0.4rem;
}

.sidebar h4:first-child { margin-top: 0; }

.sidebar a {
    display: block;
    color: var(--color-text);
    text-decoration: none;
    font-size: 0.85rem;
    padding: 0.25rem 0.5rem;
    border-radius: 3px;
    margin-bottom: 1px;
    transition: background 0.1s;
}

.sidebar a:hover { background: var(--color-border); }
.sidebar a.sub { padding-left: 1.2rem; font-size: 0.8rem; color: var(--color-text-light); }

/* ── Main Content ── */
.content {
    flex: 1;
    max-width: var(--max-content);
    padding: 2rem 2.5rem 4rem;
}

.content h1 {
    font-size: 1.8rem;
    color: var(--color-primary);
    border-bottom: 3px solid var(--color-accent);
    padding-bottom: 0.5rem;
    margin-top: 0;
}

.content h2 {
    font-size: 1.35rem;
    color: var(--color-primary);
    margin-top: 2.5rem;
    padding-bottom: 0.3rem;
    border-bottom: 1px solid var(--color-border);
}

.content h3 {
    font-size: 1.1rem;
    color: var(--color-primary-light);
    margin-top: 1.8rem;
}

.content h4 {
    font-size: 0.95rem;
    color: var(--color-text);
    margin-top: 1.4rem;
}

.content p { margin: 0.8rem 0; }

.content ul, .content ol { padding-left: 1.5rem; margin: 0.6rem 0; }
.content li { margin-bottom: 0.35rem; }

/* ── Tables ── */
.content table {
    width: 100%;
    border-collapse: collapse;
    margin: 1rem 0;
    font-size: 0.9rem;
}

.content th {
    background: var(--color-primary);
    color: #fff;
    text-align: left;
    padding: 0.6rem 0.8rem;
    font-weight: 600;
    font-size: 0.85rem;
}

.content td {
    padding: 0.5rem 0.8rem;
    border-bottom: 1px solid var(--color-border);
}

.content tr:nth-child(even) td { background: var(--color-sidebar); }

/* ── Keyboard / Menu Path ── */
kbd {
    display: inline-block;
    background: var(--color-sidebar);
    border: 1px solid var(--color-border);
    border-radius: 3px;
    padding: 0.1rem 0.4rem;
    font-family: var(--font-mono);
    font-size: 0.82rem;
    color: var(--color-primary);
    white-space: nowrap;
}

/* ── Callout boxes ── */
.callout {
    padding: 0.8rem 1rem;
    border-left: 4px solid var(--color-info);
    background: #ebf4ff;
    border-radius: 0 4px 4px 0;
    margin: 1rem 0;
    font-size: 0.92rem;
}

.callout.warning {
    border-left-color: var(--color-accent);
    background: var(--color-accent-light);
}

.callout.danger {
    border-left-color: var(--color-danger);
    background: #fff5f5;
}

.callout.success {
    border-left-color: var(--color-success);
    background: #f0fff4;
}

.callout strong { display: block; margin-bottom: 0.2rem; }

/* ── Flow diagrams (text-based) ── */
.flow {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin: 1rem 0;
    font-size: 0.9rem;
}

.flow .step {
    background: var(--color-primary);
    color: #fff;
    padding: 0.4rem 0.8rem;
    border-radius: 4px;
    white-space: nowrap;
}

.flow .arrow { color: var(--color-accent); font-weight: bold; font-size: 1.1rem; }

/* ── Grid displays (kitchen/prayer slots) ── */
.slot-grid {
    display: grid;
    gap: 2px;
    margin: 1rem 0;
    font-size: 0.85rem;
}

.slot-grid .header { background: var(--color-primary); color: #fff; padding: 0.4rem; text-align: center; font-weight: 600; }
.slot-grid .cell { padding: 0.4rem; text-align: center; border: 1px solid var(--color-border); }
.slot-grid .na { background: #edf2f7; color: var(--color-text-light); }
.slot-grid .active { background: #fff; }

/* ── Quick-start cards (index page) ── */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1rem;
    margin: 1.5rem 0;
}

.card {
    border: 1px solid var(--color-border);
    border-radius: 6px;
    padding: 1.2rem;
    transition: box-shadow 0.15s;
}

.card:hover { box-shadow: 0 2px 8px rgba(0,0,0,0.1); }

.card h3 {
    margin: 0 0 0.4rem;
    font-size: 1rem;
    color: var(--color-primary);
}

.card p { margin: 0; font-size: 0.88rem; color: var(--color-text-light); }

.card a {
    display: inline-block;
    margin-top: 0.6rem;
    color: var(--color-info);
    text-decoration: none;
    font-size: 0.88rem;
    font-weight: 500;
}

.card a:hover { text-decoration: underline; }

/* ── Footer ── */
.footer {
    text-align: center;
    padding: 1.5rem;
    font-size: 0.8rem;
    color: var(--color-text-light);
    border-top: 1px solid var(--color-border);
    margin-top: 3rem;
}

/* ── Responsive ── */
@media (max-width: 768px) {
    .top-nav { padding: 0 0.75rem; }
    .top-nav .site-title { font-size: 0.9rem; margin-right: 1rem; }

    .page-wrapper { flex-direction: column; }

    .sidebar {
        width: 100%;
        min-width: 100%;
        position: static;
        height: auto;
        border-right: none;
        border-bottom: 1px solid var(--color-border);
        padding: 1rem;
    }

    .content { padding: 1.5rem 1rem 3rem; }
}

/* ── Print ── */
@media print {
    .top-nav, .sidebar { display: none; }
    .page-wrapper { display: block; }
    .content { max-width: 100%; padding: 0; }
    .content h1 { font-size: 1.4rem; }
    .content h2 { font-size: 1.15rem; }
    body { font-size: 12pt; }
}