/* Maharashtra Excise Manual — browser-readable HTML edition.
   Optimised for legal reading: serif body, generous leading, sticky sidebar
   on desktop, off-canvas TOC + bottom nav on mobile. Light background only
   (legal texts read best on warm cream). */

:root {
    --mbk-bg: #fbfaf6;
    --mbk-paper: #ffffff;
    --mbk-ink: #1a2942;
    --mbk-ink-soft: #475569;
    --mbk-muted: #94a3b8;
    --mbk-accent: #4338ca;
    --mbk-accent-soft: #eef2ff;
    --mbk-gold: #b08600;
    --mbk-border: #e5e1d4;
    --mbk-rule: #ddd5c0;
    --mbk-amber-bg: #fef3c7;
    --mbk-amber-fg: #92400e;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; background: var(--mbk-bg); color: var(--mbk-ink); }
body {
    font-family: 'Source Serif Pro', 'Georgia', 'Times New Roman', serif;
    font-size: 16px;
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}

a { color: var(--mbk-accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ── Topbar ─────────────────────────────────────────────────────────────── */
.mbk-topbar {
    position: sticky; top: 0; z-index: 30;
    display: flex; align-items: center; gap: 16px;
    padding: 10px 18px;
    background: rgba(251, 250, 246, 0.92);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--mbk-border);
}
.mbk-brand {
    display: inline-flex; align-items: center; gap: 10px;
    color: var(--mbk-ink); font-weight: 700; font-size: 16px;
}
.mbk-brand i { color: var(--mbk-gold); font-size: 18px; }
.mbk-brand:hover { text-decoration: none; color: var(--mbk-accent); }
.mbk-topbar-actions { margin-left: auto; display: flex; align-items: center; gap: 10px; }

.mbk-search-mini {
    display: flex; align-items: stretch;
    border: 1px solid var(--mbk-border); border-radius: 8px;
    background: #fff; overflow: hidden;
}
.mbk-search-mini input {
    border: 0; padding: 7px 12px; font: inherit; font-size: 13px;
    width: 240px; background: transparent; color: var(--mbk-ink); outline: none;
}
.mbk-search-mini button {
    border: 0; padding: 7px 12px; background: var(--mbk-accent-soft);
    color: var(--mbk-accent); cursor: pointer;
}
.mbk-topbar-home {
    display: inline-flex; align-items: center; justify-content: center;
    width: 36px; height: 36px; border-radius: 8px;
    background: #fff; border: 1px solid var(--mbk-border); color: var(--mbk-ink-soft);
}
.mbk-topbar-home:hover { color: var(--mbk-accent); }

/* ── Shell layout ───────────────────────────────────────────────────────── */
.mbk-shell {
    display: grid;
    grid-template-columns: 280px minmax(0, 1fr);
    gap: 28px;
    max-width: 1220px;
    margin: 0 auto;
    padding: 24px 18px 80px;
}
.mbk-sidebar {
    position: sticky; top: 78px;
    align-self: start;
    max-height: calc(100vh - 92px);
    overflow-y: auto;
    padding: 18px;
    background: var(--mbk-paper);
    border: 1px solid var(--mbk-border); border-radius: 12px;
}
.mbk-main { min-width: 0; }

/* ── TOC index page ─────────────────────────────────────────────────────── */
.mbk-hero {
    background: linear-gradient(135deg, #1a2942 0%, #0f172a 100%);
    color: #fafaf7; border-radius: 14px;
    padding: 32px 36px;
    box-shadow: 0 6px 22px rgba(15,23,42,0.12);
    margin-bottom: 24px;
    border: 1px solid rgba(212,175,55,0.25);
}
.mbk-hero h1 { font-size: 2em; margin: 0 0 6px; letter-spacing: 0.5px; }
.mbk-hero-sub { color: #cbd5e1; font-size: 14.5px; margin: 0 0 12px; line-height: 1.55; }
.mbk-hero-stats { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 18px; font-size: 12.5px; color: #cbd5e1; }
.mbk-hero-stats strong { color: #fafaf7; font-size: 14px; }
.mbk-hero-cta-row { display: flex; flex-wrap: wrap; gap: 10px; }
.mbk-cta-primary, .mbk-cta-secondary {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 11px 22px; border-radius: 8px; font-weight: 700; font-size: 14px;
    text-decoration: none; transition: transform .12s;
}
.mbk-cta-primary { background: #d4af37; color: #1a2942; }
.mbk-cta-secondary { background: rgba(255,255,255,0.1); color: #fafaf7; border: 1px solid rgba(255,255,255,0.35); }
.mbk-cta-primary:hover, .mbk-cta-secondary:hover { transform: translateY(-1px); text-decoration: none; }

.mbk-toc { background: var(--mbk-paper); border: 1px solid var(--mbk-border); border-radius: 14px; padding: 22px 26px; }
.mbk-toc h2 { font-size: 1.3em; margin: 0 0 14px; color: var(--mbk-ink); }

.mbk-toc-part { margin: 14px 0; border-top: 1px solid var(--mbk-rule); padding-top: 14px; }
.mbk-toc-part:first-of-type { border-top: 0; padding-top: 0; }
.mbk-toc-part > summary {
    list-style: none; cursor: pointer; user-select: none;
    display: flex; flex-wrap: wrap; align-items: baseline; gap: 12px;
    padding: 6px 0;
    font-weight: 700; font-size: 1.05em;
}
.mbk-toc-part > summary::-webkit-details-marker { display: none; }
.mbk-toc-part-label {
    background: var(--mbk-accent-soft); color: var(--mbk-accent);
    padding: 2px 9px; border-radius: 999px; font-size: 11px; font-weight: 700; letter-spacing: 0.5px;
}
.mbk-toc-part-title { flex: 1; color: var(--mbk-ink); }
.mbk-toc-part-pages { color: var(--mbk-muted); font-size: 12px; font-weight: 500; }

.mbk-toc-chapters { list-style: none; margin: 8px 0 0; padding: 0 0 0 6px; border-left: 2px solid var(--mbk-rule); }
.mbk-toc-chapter { padding: 6px 0 6px 12px; }
.mbk-toc-chapter-link { font-weight: 600; color: var(--mbk-ink); }
.mbk-toc-chapter-link:hover { color: var(--mbk-accent); }
.mbk-toc-mr { display: block; font-size: 13px; color: var(--mbk-muted); margin-top: 2px; }

.mbk-toc-chapter-collapsible summary {
    list-style: none; cursor: pointer; padding: 2px 0;
}
.mbk-toc-chapter-collapsible summary::-webkit-details-marker { display: none; }
.mbk-toc-chapter-collapsible summary::before {
    content: '▸'; display: inline-block; margin-right: 6px; color: var(--mbk-muted);
    transition: transform .15s;
}
.mbk-toc-chapter-collapsible[open] summary::before { transform: rotate(90deg); }

.mbk-toc-leaf, .mbk-toc-rules {
    list-style: none; margin: 6px 0 2px; padding-left: 14px;
}
.mbk-toc-leaf li, .mbk-toc-rules li { padding: 3px 0; font-size: 14px; }
.mbk-toc-leaf a { color: var(--mbk-ink-soft); }
.mbk-toc-rules a { color: var(--mbk-ink-soft); font-size: 13.5px; }

/* ── Sidebar nav ────────────────────────────────────────────────────────── */
.mbk-side-nav { display: flex; flex-direction: column; gap: 6px; margin-bottom: 18px; }
.mbk-side-home {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 8px 12px; border-radius: 8px;
    background: var(--mbk-accent-soft); color: var(--mbk-accent); font-weight: 600;
}
.mbk-side-nav-link {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 8px 12px; border-radius: 8px;
    background: #fff; border: 1px solid var(--mbk-border); color: var(--mbk-ink); font-weight: 500;
}
.mbk-side-nav-link:hover { color: var(--mbk-accent); }

.mbk-side-jump { background: #fff; padding: 12px 14px; border: 1px solid var(--mbk-border); border-radius: 8px; }
.mbk-side-jump label { font-size: 11px; color: var(--mbk-muted); text-transform: uppercase; letter-spacing: 0.4px; font-weight: 700; }
.mbk-jump-row { display: flex; gap: 6px; margin-top: 5px; }
.mbk-jump-row input { flex: 1; min-width: 0; padding: 6px 8px; border: 1px solid var(--mbk-border); border-radius: 6px; font: inherit; font-size: 14px; }
.mbk-jump-row button { padding: 6px 12px; border: 0; background: var(--mbk-ink); color: #fff; border-radius: 6px; cursor: pointer; font-weight: 700; }
.mbk-side-jump small { display: block; margin-top: 4px; font-size: 11px; color: var(--mbk-muted); }

/* ── Page reader ────────────────────────────────────────────────────────── */
.mbk-crumb { font-size: 12.5px; color: var(--mbk-muted); margin-bottom: 14px; line-height: 1.6; }
.mbk-crumb a { color: var(--mbk-ink-soft); }
.mbk-crumb-sep { margin: 0 6px; color: var(--mbk-muted); }

.mbk-page-head { border-bottom: 1px solid var(--mbk-rule); padding-bottom: 14px; margin-bottom: 22px; }
.mbk-page-no { font-size: 11px; color: var(--mbk-gold); font-weight: 700; text-transform: uppercase; letter-spacing: 1px; }
.mbk-page-no span { color: var(--mbk-muted); font-weight: 500; letter-spacing: 0.4px; }
.mbk-page-head h1 {
    margin: 6px 0 0;
    font-size: 1.6em; line-height: 1.25; letter-spacing: 0.2px;
    color: var(--mbk-ink);
}

.mbk-page-body {
    background: var(--mbk-paper);
    border: 1px solid var(--mbk-border);
    border-radius: 14px;
    padding: 28px 36px;
    box-shadow: 0 1px 6px rgba(15,23,42,0.03);
    font-size: 16px; line-height: 1.75;
}
.mbk-page-body h1, .mbk-page-body h2, .mbk-page-body h3, .mbk-page-body h4 {
    color: var(--mbk-ink); font-weight: 700; line-height: 1.3;
    margin: 1.4em 0 0.4em;
}
.mbk-page-body h2 { font-size: 1.25em; padding-bottom: 4px; border-bottom: 1px solid var(--mbk-rule); }
.mbk-page-body h3 { font-size: 1.1em; color: #2c3e50; }
.mbk-page-body p { margin: 0 0 1em; text-align: justify; }
.mbk-page-body p:last-child { margin-bottom: 0; }
.mbk-page-body ol, .mbk-page-body ul { padding-left: 1.8em; }
.mbk-page-body li { margin-bottom: 0.4em; }
.mbk-page-body table { border-collapse: collapse; margin: 1em 0; width: 100%; font-size: 14.5px; }
.mbk-page-body th, .mbk-page-body td { border: 1px solid var(--mbk-rule); padding: 7px 11px; vertical-align: top; text-align: left; }
.mbk-page-body th { background: #faf7ef; font-weight: 700; }
.mbk-page-body hr { border: 0; border-top: 1px dashed var(--mbk-rule); margin: 1.5em 0; }

.mbk-page-body sup.fn, .mbk-page-body .fn {
    color: var(--mbk-accent); font-weight: 700; font-size: 0.75em; cursor: help;
}
.mbk-page-body .amended .amended-text {
    background: var(--mbk-amber-bg); color: var(--mbk-amber-fg);
    padding: 0 3px; border-radius: 2px;
}
.mbk-page-body .legal-marathi, .mbk-page-body .simple-marathi-card {
    background: #fffbeb; border-left: 3px solid #f59e0b;
    padding: 12px 16px; margin: 1em 0; border-radius: 4px;
    font-family: 'Noto Sans Devanagari', 'Mangal', 'Lohit Devanagari', serif;
}
.mbk-page-body .simple-marathi-card { background: #ecfeff; border-left-color: #0891b2; font-family: inherit; }
.mbk-page-body .order-no { display: inline-block; font-weight: 700; color: var(--mbk-accent); font-size: 0.95em; }
.mbk-page-body .order-source { font-style: italic; font-size: 0.95em; color: #525252; }

/* ── Page navigation ────────────────────────────────────────────────────── */
.mbk-page-nav {
    display: grid; grid-template-columns: 1fr auto 1fr;
    gap: 12px; align-items: stretch;
    margin-top: 28px;
}
.mbk-page-nav-prev, .mbk-page-nav-next, .mbk-page-nav-toc {
    display: inline-flex; align-items: center; gap: 10px;
    padding: 14px 18px;
    background: var(--mbk-paper);
    border: 1px solid var(--mbk-border); border-radius: 10px;
    color: var(--mbk-ink); font-weight: 600;
    transition: background .12s;
}
.mbk-page-nav-prev:hover, .mbk-page-nav-next:hover, .mbk-page-nav-toc:hover { background: var(--mbk-accent-soft); color: var(--mbk-accent); text-decoration: none; }
.mbk-page-nav-next { justify-self: end; }
.mbk-page-nav-toc { justify-self: center; background: var(--mbk-accent); color: #fff; border-color: var(--mbk-accent); }
.mbk-page-nav-toc:hover { background: #3730a3; color: #fff; }
.mbk-page-nav-label { display: block; font-size: 11px; color: var(--mbk-muted); text-transform: uppercase; letter-spacing: 0.5px; font-weight: 700; }
.mbk-page-nav-toc .mbk-page-nav-label { color: rgba(255,255,255,0.7); }
.mbk-page-nav-num { font-size: 14px; }

/* ── Search ─────────────────────────────────────────────────────────────── */
.mbk-search-head h1 { font-size: 1.5em; margin: 0 0 10px; }
.mbk-search-big {
    display: flex; gap: 8px;
    background: var(--mbk-paper); border: 1px solid var(--mbk-border);
    border-radius: 12px; padding: 6px; margin-bottom: 20px;
}
.mbk-search-big input {
    flex: 1; border: 0; padding: 12px 14px; font: inherit; font-size: 16px;
    background: transparent; color: var(--mbk-ink); outline: none;
}
.mbk-search-big button {
    border: 0; padding: 12px 18px; background: var(--mbk-accent); color: #fff;
    border-radius: 8px; font-weight: 700; cursor: pointer;
}
.mbk-search-meta { color: var(--mbk-muted); font-size: 13.5px; margin: 12px 0 16px; }
.mbk-search-empty { color: var(--mbk-ink-soft); }
.mbk-search-results { list-style: none; padding: 0; margin: 0; }
.mbk-search-result { background: var(--mbk-paper); border: 1px solid var(--mbk-border); border-radius: 10px; margin-bottom: 10px; }
.mbk-search-result-link { display: block; padding: 14px 18px; color: var(--mbk-ink); }
.mbk-search-result-link:hover { background: var(--mbk-accent-soft); text-decoration: none; }
.mbk-search-result-page { display: block; font-size: 11px; color: var(--mbk-gold); font-weight: 700; text-transform: uppercase; letter-spacing: 1px; margin-bottom: 4px; }
.mbk-search-result-snippet { color: var(--mbk-ink-soft); font-size: 14.5px; line-height: 1.6; }
.mbk-search-result-snippet mark { background: #fff3a3; color: var(--mbk-ink); padding: 0 2px; border-radius: 2px; }
.mbk-search-tips ul { padding-left: 1.4em; }
.mbk-search-tips li { margin-bottom: 6px; }

/* ── Mobile TOC FAB ─────────────────────────────────────────────────────── */
.mbk-toc-fab {
    display: none;
    position: fixed; bottom: 18px; right: 18px; z-index: 40;
    width: 52px; height: 52px;
    border: 0; border-radius: 50%;
    background: var(--mbk-accent); color: #fff;
    box-shadow: 0 6px 16px rgba(67,56,202,0.4);
    font-size: 18px; cursor: pointer;
}

/* ── Mobile responsive ──────────────────────────────────────────────────── */
@media (max-width: 960px) {
    .mbk-shell { grid-template-columns: 1fr; gap: 16px; padding: 16px 12px 96px; }
    .mbk-sidebar {
        position: fixed; top: 0; left: 0;
        height: 100vh; width: min(340px, 88vw);
        z-index: 50; max-height: 100vh;
        transform: translateX(-100%); transition: transform 0.2s ease;
        border-radius: 0; border-right: 1px solid var(--mbk-border);
        box-shadow: 0 0 32px rgba(0,0,0,0.16);
    }
    .mbk-sidebar.is-open { transform: translateX(0); }
    body.mbk-sidebar-open { overflow: hidden; }
    .mbk-toc-fab { display: inline-flex; align-items: center; justify-content: center; }
    .mbk-topbar { padding: 8px 12px; }
    .mbk-search-mini input { width: 130px; }
    .mbk-brand-title { display: none; }
    .mbk-hero { padding: 24px 22px; }
    .mbk-hero h1 { font-size: 1.55em; }
    .mbk-page-body { padding: 20px 18px; font-size: 15.5px; }
    .mbk-page-head h1 { font-size: 1.35em; }
    .mbk-page-nav { grid-template-columns: 1fr; }
    .mbk-page-nav-next { justify-self: stretch; }
    .mbk-page-nav-toc { justify-self: stretch; }
}

/* ── Cited-anchor flash (Phase-1 D2) ────────────────────────────────────── */
/* When an AI citation deep-links to a paragraph (#anchor), the JS in
   manual-book.js adds .mbk-cited-flash for ~3s. The keyframe pulses an
   amber background that fades back to transparent so the reader can
   visually confirm WHICH line was cited without losing the body's normal
   styling. scroll-margin-top ensures the sticky topbar doesn't cover the
   anchored element when smooth-scrolled into view. */
.mbk-page-body :target,
.mbk-page-body [id^="p"][id*="-"] {
    scroll-margin-top: 84px;
}
.mbk-cited-flash {
    animation: mbk-cited-flash-anim 3s ease-out 1;
    border-radius: 4px;
}
@keyframes mbk-cited-flash-anim {
    0%   { background-color: rgba(251, 191, 36, 0.55); box-shadow: 0 0 0 4px rgba(251, 191, 36, 0.55); }
    20%  { background-color: rgba(251, 191, 36, 0.45); box-shadow: 0 0 0 4px rgba(251, 191, 36, 0.35); }
    100% { background-color: transparent;              box-shadow: 0 0 0 0 transparent; }
}

/* ── Print ──────────────────────────────────────────────────────────────── */
@media print {
    .mbk-topbar, .mbk-sidebar, .mbk-page-nav, .mbk-toc-fab, .mbk-crumb { display: none; }
    .mbk-shell { grid-template-columns: 1fr; padding: 0; max-width: none; }
    .mbk-page-body { border: 0; padding: 0; box-shadow: none; background: #fff; }
}