/* ============================================================================
   EgyBI — shared design system (one file, applied on every page)
   ----------------------------------------------------------------------------
   COLOR IDENTITY (disciplined, on purpose):
   - Structural color:  Egyptian Blue      -> headings, links, primary data, nav
   - The one accent:    Gold                -> CTAs, highlights, dark-surface accents
   - Two surfaces only:  Papyrus (light) and Kemet (dark). Sections alternate
     between exactly these two. No third/fourth background color competing.
   - Functional only:   malachite (success) + carnelian (error). NEVER used as a
     section background or decoration — only for state feedback.
   This fixes the previous "too many colors, no identity" problem: gold is the
   sole accent, blue is structural, and every section is either Papyrus or Kemet.
   ============================================================================ */

:root {
  /* structural */
  --blue: #17408B;
  --blue-deep: #0E2A5E;
  --blue-soft: rgba(23, 64, 139, 0.10);

  /* the one accent */
  --gold: #C9A227;
  --gold-bright: #E7C64C;      /* gold text on DARK surfaces */
  --gold-ink: #7A5E10;         /* readable gold text on LIGHT surfaces (WCAG AA) */
  --gold-soft: rgba(201, 162, 39, 0.14);

  /* two surfaces */
  --kemet: #14110C;          /* dark surface */
  --kemet-2: #1E1810;        /* dark elevated (cards on dark) */
  --papyrus: #F6EEDC;        /* light surface */
  --papyrus-2: #FCF8EC;      /* light elevated (cards on light) */

  /* text */
  --ink: #292420;
  --ink-soft: #6a6252;
  --on-dark: #F3EAD4;
  --on-dark-soft: #b7ac8e;

  /* lines */
  --line-light: rgba(23, 64, 139, 0.12);
  --line-dark: rgba(201, 162, 39, 0.20);

  /* functional (state only) */
  --success: #1F7A5C;
  --danger: #B7410E;

  --radius: 14px;
  --shadow-light: 0 14px 34px rgba(23, 64, 139, 0.10);
  --shadow-dark: 0 18px 44px rgba(20, 17, 12, 0.28);
  --maxw: 1120px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--papyrus);
  color: var(--ink);
  line-height: 1.65;
  overflow-x: hidden;
}
h1, h2, h3, h4, .display, .brand { font-family: 'Cinzel', Georgia, serif; letter-spacing: 0.01em; line-height: 1.15; }
a { color: var(--blue); }
code, .mono { font-family: "SF Mono", Menlo, Consolas, monospace; }
img { max-width: 100%; }
.sr-only { position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0; }

/* ---------- surfaces (the section rhythm) ---------- */
.surface-light { background: var(--papyrus); color: var(--ink); }
.surface-light-2 { background: var(--papyrus-2); color: var(--ink); }
.surface-dark { background: var(--kemet); color: var(--on-dark); }
.surface-hero {
  background: radial-gradient(circle at 28% 12%, #1c4aa0 0%, var(--blue-deep) 42%, var(--kemet) 100%);
  color: #fff;
}
.surface-dark h1, .surface-dark h2, .surface-dark h3, .surface-hero h1, .surface-hero h2 { color: #fff; }
.surface-dark p, .surface-hero p { color: var(--on-dark); }

section { padding: 72px 6vw; }
.wrap { max-width: var(--maxw); margin: 0 auto; }
h2 { font-size: clamp(1.6rem, 3vw, 2.15rem); margin: 0 0 12px; color: var(--blue-deep); }
.surface-dark h2 { color: #fff; }
.lead { font-size: clamp(1rem, 1.6vw, 1.15rem); max-width: 720px; color: var(--ink-soft); }
.surface-dark .lead { color: var(--on-dark-soft); }
.kicker { color: var(--gold-ink); font-weight: 800; text-transform: uppercase; font-size: 0.76rem; letter-spacing: 0.14em; margin-bottom: 10px; font-family: 'Inter', sans-serif; }
.surface-dark .kicker, .surface-hero .kicker { color: var(--gold-bright); }
.center { text-align: center; }
.center .lead { margin-left: auto; margin-right: auto; }

/* ---------- header / nav ---------- */
.site-header {
  background: rgba(20, 17, 12, 0.94); backdrop-filter: blur(10px);
  color: #fff; position: sticky; top: 0; z-index: 100;
  border-bottom: 1px solid var(--line-dark);
}
.site-header .bar { max-width: var(--maxw); margin: 0 auto; padding: 15px 6vw; display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.3rem; color: #fff; text-decoration: none; }
.brand svg { width: 26px; height: 26px; }
.nav-links { display: flex; align-items: center; flex-wrap: wrap; gap: 22px; }
.nav-links a { color: var(--on-dark); text-decoration: none; font-size: 0.92rem; opacity: 0.85; transition: color .2s, opacity .2s; font-weight: 500; }
.nav-links a:hover, .nav-links a:focus-visible, .nav-links a.active { color: var(--gold-bright); opacity: 1; }
.nav-links a.cta { background: var(--gold); color: var(--kemet); padding: 8px 16px; border-radius: 8px; font-weight: 700; }
.nav-links a.cta:hover { background: var(--gold-bright); color: var(--kemet); }
.nav-toggle { display: none; background: none; border: 1px solid var(--line-dark); color: #fff; border-radius: 8px; padding: 8px 12px; cursor: pointer; font-size: 1.1rem; }

/* ---------- buttons ---------- */
.btn { display: inline-block; padding: 14px 28px; border-radius: 10px; font-weight: 700; text-decoration: none; font-size: 1rem; cursor: pointer; border: none; font-family: inherit; transition: transform .18s, box-shadow .18s, background .2s, color .2s; }
.btn-primary { color: var(--kemet); background: linear-gradient(110deg, var(--gold), var(--gold-bright), var(--gold)); background-size: 200% auto; box-shadow: 0 6px 20px rgba(201,162,39,0.35); }
.btn-primary:hover, .btn-primary:focus-visible { background-position: right center; transform: translateY(-2px); box-shadow: 0 10px 28px rgba(201,162,39,0.5); }
.btn-ghost { background: transparent; color: #fff; border: 1.5px solid rgba(255,255,255,0.5); }
.btn-ghost:hover, .btn-ghost:focus-visible { border-color: var(--gold-bright); color: var(--gold-bright); transform: translateY(-2px); }
.btn-blue { background: var(--blue); color: #fff; }
.btn-blue:hover { background: var(--blue-deep); transform: translateY(-2px); }
.cta-row { display: flex; gap: 16px; flex-wrap: wrap; margin-top: 26px; }
.center .cta-row { justify-content: center; }

/* ---------- cards / grids ---------- */
.grid { display: grid; gap: 22px; }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); }
.grid-4 { grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); }
.card { background: var(--papyrus-2); border: 1px solid var(--line-light); border-radius: var(--radius); padding: 26px; transition: transform .25s, box-shadow .25s; }
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-light); }
.card h3 { margin: 0 0 8px; font-size: 1.1rem; color: var(--blue-deep); }
.card p { margin: 0; font-size: 0.95rem; color: var(--ink-soft); }
.card .tag { display: inline-block; font-size: 0.72rem; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase; color: var(--gold-ink); background: var(--gold-soft); padding: 3px 10px; border-radius: 999px; margin-bottom: 10px; }
.surface-dark .card .tag { color: var(--gold-bright); background: rgba(201,162,39,0.16); }
.surface-dark .card { background: var(--kemet-2); border-color: var(--line-dark); }
.surface-dark .card h3 { color: var(--gold-bright); }
.surface-dark .card p { color: var(--on-dark-soft); }

/* ---------- pills ---------- */
.pills { display: flex; flex-wrap: wrap; gap: 12px; }
.pill { background: var(--papyrus-2); border: 1px solid var(--line-light); color: var(--blue-deep); padding: 10px 18px; border-radius: 999px; font-size: 0.9rem; font-weight: 600; transition: transform .2s, background .2s; text-decoration: none; }
.pill:hover { transform: translateY(-3px); background: #fff; }

/* ---------- stat band ---------- */
.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 26px; }
.stat { text-align: center; }
.stat .num { font-family: 'Cinzel', serif; font-size: clamp(2.1rem, 4.6vw, 3.1rem); font-weight: 700; color: var(--gold-bright); line-height: 1; }
.stat .label { margin-top: 10px; font-weight: 600; font-size: 0.98rem; }
.stat .cap { margin-top: 4px; font-size: 0.76rem; color: var(--on-dark-soft); }
/* stat bands default to dark-surface colours; on LIGHT surfaces use readable ink */
.surface-light .stat .num, .surface-light-2 .stat .num { color: var(--gold-ink); }
.surface-light .stat .cap, .surface-light-2 .stat .cap { color: var(--ink-soft); }
/* card meta ("· b.1992") — dark ink on light cards, light beige on dark cards */
.card-meta { color: var(--ink-soft); font-weight: 400; font-size: 0.85rem; }
.surface-dark .card .card-meta { color: var(--on-dark-soft); }

/* ---------- chart card ---------- */
.chart-card { background: var(--papyrus-2); border: 1px solid var(--line-light); border-radius: var(--radius); padding: 26px; box-shadow: var(--shadow-light); }
.chart-card h3 { margin: 0 0 4px; color: var(--blue-deep); font-size: 1.15rem; }
.chart-box { position: relative; height: 320px; margin-top: 14px; }
.chart-cap { font-size: 0.8rem; color: var(--ink-soft); margin-top: 14px; }
/* chart-cards keep a LIGHT background even inside a .surface-dark section, so
   force their caption text dark — otherwise `.surface-dark p` (higher specificity
   than `.chart-cap`) turns it light and it washes out on the light card. Genuinely
   dark chart-cards set their caption colour inline, which still wins. */
.chart-card .chart-cap { color: var(--ink-soft); }
.chart-card h3 { color: var(--blue-deep); }

/* ---------- Egypt choropleth map ---------- */
.map-box { position: relative; height: clamp(300px, 52vw, 480px); }
.map-toolbar { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin: 4px 0 14px; }
.map-toggle { font-size: 0.82rem; font-weight: 600; padding: 7px 14px; border-radius: 999px; border: 1px solid var(--line-light); background: var(--papyrus-2); color: var(--ink-soft); cursor: pointer; transition: all .15s; }
.map-toggle:hover, .map-toggle:focus-visible { border-color: var(--gold); outline: none; }
.map-toggle.on { background: var(--blue); color: #fff; border-color: var(--blue); }
.map-legend { margin-top: 12px; }
.map-legend-title { font-size: 0.78rem; font-weight: 700; color: var(--blue-deep); text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 8px; }
.map-legend-row { display: flex; flex-wrap: wrap; gap: 6px 16px; }
.map-legend-item { display: inline-flex; align-items: center; gap: 7px; font-size: 0.8rem; color: var(--ink-soft); }
.map-legend-item .sw { width: 16px; height: 12px; border-radius: 3px; display: inline-block; border: 1px solid rgba(0,0,0,0.08); }
/* Leaflet: no tiles — papyrus background, themed controls + tooltip */
.map-box.leaflet-container { background: var(--papyrus); border-radius: 12px; font-family: 'Inter', sans-serif; outline: none; }
.leaflet-container a.leaflet-control-zoom-in, .leaflet-container a.leaflet-control-zoom-out { color: var(--blue-deep); }
.egypt-map-tip { background: var(--kemet); color: var(--on-dark); border: 1px solid var(--gold); border-radius: 8px; font-size: 0.82rem; padding: 6px 10px; box-shadow: var(--shadow-dark); }
.egypt-map-tip strong { color: var(--gold-bright); }
.egypt-map-tip::before { display: none; } /* hide default tooltip arrow for a cleaner card */
.chart-cap a { color: var(--blue); }

/* ---------- SQL sandbox ---------- */
.sandbox { background: linear-gradient(160deg, #1b160e, var(--kemet)); border-radius: 16px; padding: 28px; color: var(--on-dark); box-shadow: var(--shadow-dark); border: 1px solid var(--line-dark); }
.sandbox label { display: block; font-size: 0.85rem; color: var(--gold-bright); font-weight: 700; margin-bottom: 10px; }
.sandbox textarea { width: 100%; min-height: 108px; border-radius: 10px; border: 1.5px solid var(--line-dark); background: #262019; color: var(--on-dark); padding: 14px 16px; font-size: 0.95rem; resize: vertical; line-height: 1.5; }
.sandbox textarea:focus-visible { outline: 2px solid var(--gold); border-color: var(--gold); }
.sandbox .row { display: flex; gap: 14px; align-items: center; margin-top: 16px; flex-wrap: wrap; }
.sql-status { font-size: 0.85rem; color: var(--on-dark-soft); }
.sql-status.ready { color: #6bd6ab; } .sql-status.ready::before { content: "● "; }
.sql-status.error { color: #e08a5c; }
.result-wrap { margin-top: 20px; overflow-x: auto; background: #fff; border-radius: 10px; }
.result-table { border-collapse: collapse; width: 100%; font-size: 0.88rem; color: var(--ink); }
.result-table th, .result-table td { padding: 10px 15px; border-bottom: 1px solid var(--line-light); text-align: left; white-space: nowrap; }
.result-table th { background: var(--papyrus); color: var(--blue-deep); font-family: 'Inter', sans-serif; }
.sql-error, .sql-empty { color: var(--danger); padding: 15px; margin: 0; font-size: 0.9rem; }
.hint { font-size: 0.82rem; color: var(--on-dark-soft); margin-top: 16px; }
.hint a { color: var(--gold-bright); }

/* ---------- timeline ---------- */
.timeline { position: relative; margin-top: 30px; padding-left: 26px; border-left: 2px solid var(--gold-soft); }
.tl-item { position: relative; padding: 0 0 26px 22px; }
.tl-item::before { content: ""; position: absolute; left: -33px; top: 4px; width: 12px; height: 12px; border-radius: 50%; background: var(--gold); border: 3px solid var(--papyrus); }
.surface-dark .tl-item::before { border-color: var(--kemet); }
.tl-year { font-family: 'Cinzel', serif; font-weight: 700; color: var(--blue); font-size: 1.05rem; }
.surface-dark .tl-year { color: var(--gold-bright); }
.tl-item h4 { margin: 2px 0 4px; font-size: 1rem; }
.tl-item p { margin: 0; font-size: 0.9rem; color: var(--ink-soft); }
.surface-dark .tl-item p { color: var(--on-dark-soft); }

/* ---------- ranks / badges ---------- */
.rank-ladder { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin: 24px 0; }
.rank { background: var(--kemet-2); border: 1px solid var(--line-dark); padding: 9px 15px; border-radius: 9px; font-size: 0.88rem; color: var(--gold-bright); font-weight: 600; }
.rank-arrow { color: rgba(255,255,255,0.32); }
.badge-card { background: var(--kemet-2); border: 1px solid var(--line-dark); border-radius: 12px; padding: 18px; transition: transform .25s, border-color .25s, box-shadow .25s; }
.badge-card:hover, .badge-card:focus-within { transform: translateY(-5px); border-color: var(--gold-bright); box-shadow: 0 10px 24px rgba(201,162,39,0.18); }
.badge-card .name { color: var(--gold-bright); font-weight: 700; font-size: 0.92rem; }
.badge-card p { font-size: 0.84rem; color: var(--on-dark-soft); margin: 7px 0 0; }

/* ---------- trivia / callout ---------- */
.callout { background: var(--papyrus-2); border: 2px solid var(--gold); border-radius: var(--radius); padding: 26px 30px; box-shadow: 0 14px 34px rgba(201,162,39,0.14); }
.callout .label { color: var(--danger); font-weight: 700; font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 9px; }
.callout p { margin: 0; font-size: 1.04rem; }
.callout .src { display: block; margin-top: 11px; font-size: 0.8rem; color: var(--ink-soft); }

/* ---------- forms / newsletter ---------- */
.form-inline { max-width: 480px; margin: 24px auto 0; display: flex; gap: 10px; flex-wrap: wrap; justify-content: center; }
.form-inline input[type=email] { flex: 1 1 260px; padding: 15px 17px; border-radius: 10px; border: 1.5px solid var(--line-light); font-size: 1rem; font-family: inherit; }
.form-inline input[type=email]:focus-visible { outline: 2px solid var(--blue); }
.form-note { font-size: 0.9rem; margin-top: 15px; min-height: 1.4em; }
.form-note.ok { color: var(--success); font-weight: 600; }
.form-note.error { color: var(--danger); font-weight: 600; }
/* honeypot — hidden from humans (and assistive tech), visible to naive bots */
.hp-field { position: absolute !important; left: -9999px; width: 1px; height: 1px; opacity: 0; pointer-events: none; }

/* ---------- footer ---------- */
.site-footer { background: var(--kemet); color: var(--on-dark-soft); padding: 48px 6vw 40px; }
.site-footer .cols { max-width: var(--maxw); margin: 0 auto; display: grid; grid-template-columns: 1.4fr repeat(3, 1fr); gap: 28px; }
.site-footer h5 { color: var(--gold-bright); font-size: 0.82rem; text-transform: uppercase; letter-spacing: 0.08em; margin: 0 0 12px; font-family: 'Inter', sans-serif; }
.site-footer a { color: var(--on-dark); text-decoration: none; display: block; padding: 4px 0; font-size: 0.9rem; opacity: 0.85; }
.site-footer a:hover { color: var(--gold-bright); opacity: 1; }
.site-footer .brand { margin-bottom: 12px; }
.site-footer .colophon { max-width: var(--maxw); margin: 28px auto 0; padding-top: 20px; border-top: 1px solid var(--line-dark); font-size: 0.82rem; }

/* ---------- ad slots (Google AdSense, config-gated via assets/ads.js) ---------- */
.ad-slot { max-width: var(--maxw); margin: 8px auto 0; padding: 0 6vw; text-align: center; }
.ad-slot .ad-label { display: block; font-size: 0.68rem; letter-spacing: 0.09em; text-transform: uppercase; color: var(--ink-soft); margin-bottom: 6px; font-family: 'Inter', sans-serif; }
.ad-slot ins { display: block; min-height: 90px; }

/* ---------- hero particles layer ---------- */
.hero-particles { position: absolute; inset: 0; z-index: 0; }
.hero-inner { position: relative; z-index: 1; }

/* ---------- responsive ---------- */
@media (max-width: 820px) {
  .nav-links { position: absolute; top: 100%; right: 0; left: 0; flex-direction: column; align-items: flex-start; gap: 4px; background: var(--kemet); padding: 12px 6vw 18px; border-bottom: 1px solid var(--line-dark); display: none; }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 8px 0; width: 100%; }
  .nav-toggle { display: inline-block; }
  .site-header .bar { position: relative; }
  .site-footer .cols { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 560px) {
  section { padding: 52px 6vw; }
  .rank-ladder { flex-direction: column; align-items: flex-start; }
  .rank-arrow { display: none; }
  .site-footer .cols { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation: none !important; transition: none !important; }
}

/* ---------- motion micro-interactions (disabled under reduced-motion above) ---------- */
.card, .track, .chart-card, .concept, .layer, .role, .phase, .post-card {
  transition: transform .25s cubic-bezier(.22,1,.36,1), box-shadow .25s ease, border-color .2s ease;
}
.card:hover, .track:hover, .chart-card:hover, .concept:hover, .layer:hover, .role:hover, .phase:hover, .post-card:hover {
  transform: translateY(-4px);
}
.btn-primary { position: relative; overflow: hidden; }
.btn-primary::after {
  content: ''; position: absolute; top: 0; left: -130%; width: 55%; height: 100%;
  background: linear-gradient(100deg, transparent, rgba(255,255,255,0.35), transparent);
  transform: skewX(-18deg); transition: left .6s ease; pointer-events: none;
}
.btn-primary:hover::after { left: 140%; }
.nav-links a:not(.cta) { position: relative; }
.nav-links a:not(.cta)::after {
  content: ''; position: absolute; left: 0; bottom: -2px; height: 2px; width: 0;
  background: var(--gold-bright); transition: width .25s ease;
}
.nav-links a:not(.cta):hover::after { width: 100%; }
.brand svg { transition: transform .4s cubic-bezier(.22,1,.36,1); }
.brand:hover svg { transform: rotate(-8deg) scale(1.08); }
@media (prefers-reduced-motion: reduce) {
  .card:hover, .track:hover, .chart-card:hover, .concept:hover, .layer:hover,
  .role:hover, .phase:hover, .post-card:hover, .brand:hover svg { transform: none !important; }
}