/* ============================================================
   موسوعة الخيل — المنصّة المعرفيّة الغامرة (واجهة فقط)
   لوحة كحليّة/ذهبيّة/عاجيّة أكاديميّة
   ============================================================ */

:root {
  --pf-ink: #16243a;
  --pf-ink-2: #0f1b2d;
  --pf-ink-3: #1d3047;
  --pf-gold: #c2a04a;
  --pf-gold-bright: #d8b85f;
  --pf-gold-deep: #9c7e30;
  --pf-ivory: #f6f2e9;
  --pf-paper: #fffdf8;
  --pf-text: #233040;
  --pf-text-soft: #566472;
  --pf-text-mute: #8a95a1;
  --pf-line: #e6dfce;
  --pf-line-ink: rgba(194,160,74,.25);

  --pf-font: "Tajawal", system-ui, sans-serif;
  --pf-serif: "Amiri", serif;
  --pf-maxw: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body.platform-body {
  margin: 0;
  font-family: var(--pf-font);
  color: var(--pf-text);
  background: var(--pf-paper);
  font-size: 16px;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}
.platform-body a { color: inherit; text-decoration: none; }

/* Brand logo (shared) */
.brand-logo { display: block; height: 52px; width: auto; }

.pf-section { max-width: var(--pf-maxw); margin: 0 auto; padding: 80px 24px; }
.pf-kicker {
  display: inline-block;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 3px;
  color: var(--pf-gold-deep);
  margin-bottom: 12px;
}

/* ===================== Nav ===================== */
.pf-nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,253,248,.9);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--pf-line);
}
.pf-nav-inner {
  max-width: var(--pf-maxw);
  margin: 0 auto;
  padding: 10px 24px;
  display: flex;
  align-items: center;
  gap: 24px;
}
.pf-brand { display: flex; align-items: center; }
.pf-links { display: flex; gap: 6px; margin-inline-start: 12px; }
.pf-links a {
  padding: 8px 14px; font-size: 15px; font-weight: 500; color: var(--pf-text-soft);
  border-radius: 8px; transition: color .15s, background .15s;
}
.pf-links a:hover { color: var(--pf-ink); background: var(--pf-ivory); }
.pf-nav-actions { margin-inline-start: auto; display: flex; align-items: center; gap: 10px; }
.pf-search-btn {
  display: inline-flex; align-items: center; gap: 7px;
  background: var(--pf-ivory); border: 1px solid var(--pf-line);
  color: var(--pf-text); padding: 8px 14px; border-radius: 999px;
  font-family: inherit; font-size: 14px; font-weight: 500; cursor: pointer;
}
.pf-search-btn:hover { border-color: var(--pf-gold); }
.pf-login {
  background: var(--pf-ink); color: var(--pf-paper);
  padding: 9px 18px; border-radius: 999px; font-weight: 700; font-size: 14px;
  transition: background .18s;
}
.pf-login:hover { background: var(--pf-ink-2); }
.pf-burger { display: none; flex-direction: column; gap: 4px; background: none; border: none; cursor: pointer; padding: 6px; }
.pf-burger span { width: 22px; height: 2px; background: var(--pf-ink); border-radius: 2px; }

/* ===================== Hero ===================== */
.pf-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  color: #f3ecdc;
  padding: 100px 24px 90px;
}
.pf-hero-media {
  position: absolute; inset: 0; z-index: -2;
  background: url("images/arabian-grey-run.jpg") center/cover;
  transform: scaleX(-1);
}
.pf-hero-shade {
  position: absolute; inset: 0; z-index: -1;
  background:
    linear-gradient(105deg, rgba(15,27,45,.96) 30%, rgba(15,27,45,.7) 60%, rgba(15,27,45,.4) 100%),
    linear-gradient(0deg, rgba(15,27,45,.85), transparent 60%);
}
.pf-hero-inner { max-width: var(--pf-maxw); margin: 0 auto; }
.pf-hero .pf-eyebrow {
  display: inline-block; font-size: 13px; font-weight: 700; letter-spacing: 3px;
  color: var(--pf-gold-bright); border: 1px solid rgba(216,184,95,.4);
  padding: 6px 16px; border-radius: 999px; margin-bottom: 22px;
}
.pf-hero-title {
  font-family: var(--pf-serif);
  font-size: clamp(32px, 5.4vw, 62px);
  font-weight: 700; line-height: 1.25; margin: 0 0 20px;
  max-width: 880px;
}
.pf-hero-title span { color: var(--pf-gold-bright); }
.pf-hero-sub { font-size: clamp(16px,1.8vw,19px); color: rgba(243,236,220,.82); max-width: 620px; margin: 0 0 32px; }

.pf-search {
  display: flex; align-items: center; gap: 8px;
  background: var(--pf-paper); border-radius: 999px;
  padding: 6px 6px 6px 18px; max-width: 680px;
  box-shadow: 0 18px 50px -18px rgba(0,0,0,.6);
}
.pf-search svg { color: var(--pf-text-mute); flex-shrink: 0; }
.pf-search input {
  flex: 1; border: none; background: transparent; outline: none;
  font-family: inherit; font-size: 15px; color: var(--pf-text); padding: 10px 4px;
}
.pf-search button {
  border: none; cursor: pointer; background: var(--pf-gold); color: var(--pf-ink-2);
  font-family: inherit; font-weight: 800; font-size: 14px; padding: 11px 22px; border-radius: 999px;
  white-space: nowrap; transition: background .18s;
}
.pf-search button:hover { background: var(--pf-gold-bright); }

.pf-dims { display: flex; flex-wrap: wrap; gap: 10px 22px; margin-top: 26px; }
.pf-dims span { font-size: 13.5px; color: rgba(243,236,220,.7); }
.pf-dims b { color: var(--pf-gold-bright); font-weight: 800; margin-inline-end: 4px; }

/* ===================== Zones head ===================== */
.pf-zones-head { text-align: center; max-width: 720px; padding-bottom: 20px; }
.pf-zones-head h2 { font-family: var(--pf-serif); font-size: clamp(26px,3.6vw,40px); margin: 0 0 12px; color: var(--pf-ink); }
.pf-zones-head p { color: var(--pf-text-soft); margin: 0; }

/* ===================== Zone (alternating) ===================== */
.pf-zone {
  max-width: var(--pf-maxw); margin: 0 auto; padding: 40px 24px;
  display: grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items: center;
}
.pf-zone-rev .pf-zone-text { order: 2; }
.pf-znum { font-size: 13px; font-weight: 800; letter-spacing: 1px; color: var(--pf-gold-deep); }
.pf-zone-text h3 { font-family: var(--pf-serif); font-size: clamp(24px,3vw,34px); margin: 8px 0 14px; color: var(--pf-ink); line-height: 1.3; }
.pf-zone-text p { color: var(--pf-text-soft); margin: 0 0 20px; font-size: 16.5px; }
.pf-zone-link { font-weight: 800; color: var(--pf-gold-deep); }
.pf-zone-link:hover { color: var(--pf-ink); }
.pf-zone-visual { min-width: 0; }

.pf-tag {
  display: inline-block; background: var(--pf-gold); color: var(--pf-ink-2);
  font-size: 11.5px; font-weight: 800; padding: 3px 11px; border-radius: 999px; margin-bottom: 8px;
}

/* Zone 1: timeline mock */
.pf-tl-mock {
  position: relative; background: var(--pf-ivory); border: 1px solid var(--pf-line);
  border-radius: 18px; padding: 30px 24px 26px;
}
.pf-tl-line { position: absolute; top: 46px; inset-inline: 40px; height: 2px; background: repeating-linear-gradient(90deg, var(--pf-gold) 0 7px, transparent 7px 13px); }
.pf-tl-mock { display: grid; grid-template-columns: repeat(5,1fr); gap: 8px; }
.pf-tl-node {
  position: relative; background: none; border: none; cursor: pointer;
  font-family: inherit; padding-top: 22px; font-size: 11.5px; color: var(--pf-text-soft); font-weight: 600;
}
.pf-tl-node::before {
  content: ""; position: absolute; top: 0; inset-inline-start: 50%; transform: translateX(50%);
  width: 14px; height: 14px; border-radius: 50%; background: var(--pf-paper); border: 2px solid var(--pf-gold);
}
.pf-tl-node.is-active { color: var(--pf-ink); }
.pf-tl-node.is-active::before { background: var(--pf-gold); box-shadow: 0 0 0 4px rgba(194,160,74,.25); }
.pf-tl-card {
  grid-column: 1 / -1; margin-top: 18px; background: var(--pf-paper);
  border: 1px solid var(--pf-line); border-inline-start: 4px solid var(--pf-gold);
  border-radius: 10px; padding: 16px 18px;
}
.pf-tl-card h4 { font-family: var(--pf-serif); font-size: 20px; margin: 4px 0 6px; color: var(--pf-ink); }
.pf-tl-card p { margin: 0; font-size: 13.5px; color: var(--pf-text-soft); }

/* Zone 2: globe mock */
.pf-globe-mock { position: relative; aspect-ratio: 1/1; max-width: 380px; margin: 0 auto; display: grid; place-items: center; }
.pf-globe {
  width: 78%; aspect-ratio: 1/1; border-radius: 50%; position: relative;
  background: radial-gradient(circle at 35% 30%, var(--pf-ink-3), var(--pf-ink-2) 70%, #0a1320);
  box-shadow: inset 0 0 40px rgba(0,0,0,.5), 0 18px 50px -20px rgba(15,27,45,.7);
  overflow: hidden; border: 1px solid var(--pf-line-ink);
}
.pf-meridian, .pf-parallel { position: absolute; inset: 0; border: 1px solid rgba(194,160,74,.28); border-radius: 50%; }
.pf-meridian { inset: 0 38%; }
.pf-meridian.m2 { inset: 0 18%; }
.pf-parallel { inset: 38% 0; }
.pf-parallel.p2 { inset: 18% 0; }
.pf-geo-pin {
  position: absolute; transform: translate(50%,-50%);
  background: var(--pf-gold); color: var(--pf-ink-2);
  font-size: 12px; font-weight: 800; padding: 4px 11px; border-radius: 999px;
  box-shadow: 0 4px 12px rgba(0,0,0,.3); white-space: nowrap;
}
.pf-geo-pin::after { content: ""; position: absolute; inset-inline-end: -3px; top: 50%; width: 6px; height: 6px; background: var(--pf-gold); border-radius: 50%; }

/* Zone 3: split mock */
.pf-split-mock { display: grid; grid-template-columns: 1fr 1fr; border-radius: 16px; overflow: hidden; border: 1px solid var(--pf-line); box-shadow: 0 18px 44px -22px rgba(15,27,45,.4); }
.pf-split-img { background: url("images/arabian-white-field.jpg") center/cover; min-height: 240px; position: relative; }
.pf-split-img::after { content: "المخطوطة الأصلية"; position: absolute; bottom: 10px; inset-inline-start: 10px; background: rgba(15,27,45,.75); color: #f3ecdc; font-size: 11px; font-weight: 700; padding: 4px 10px; border-radius: 6px; }
.pf-split-text { background: var(--pf-paper); padding: 22px; display: flex; flex-direction: column; gap: 9px; }
.pf-split-label { font-size: 11px; font-weight: 800; color: var(--pf-gold-deep); letter-spacing: 1px; }
.pf-line { height: 9px; border-radius: 4px; background: var(--pf-line); }
.pf-line.short { width: 60%; }
.pf-foot { margin-top: auto; font-size: 11.5px; color: var(--pf-text-mute); border-top: 1px dashed var(--pf-line); padding-top: 8px; }

/* Zone 4: tree mock */
.pf-tree-mock { background: var(--pf-ivory); border: 1px solid var(--pf-line); border-radius: 18px; padding: 26px; text-align: center; }
.pf-tree-root { display: inline-block; background: var(--pf-ink); color: var(--pf-paper); font-weight: 700; padding: 9px 22px; border-radius: 10px; position: relative; }
.pf-tree-row { display: flex; justify-content: center; gap: 14px; margin-top: 26px; position: relative; }
.pf-tree-row::before { content: ""; position: absolute; top: -14px; inset-inline: 18%; height: 1px; background: var(--pf-gold); }
.pf-tree-node { background: var(--pf-paper); border: 1px solid var(--pf-gold); color: var(--pf-ink); font-weight: 700; font-size: 14px; padding: 8px 14px; border-radius: 9px; position: relative; }
.pf-tree-node::before { content: ""; position: absolute; top: -14px; inset-inline-start: 50%; width: 1px; height: 14px; background: var(--pf-gold); }
.pf-tree-leaves { gap: 10px; flex-wrap: wrap; }
.pf-tree-leaves::before { display: none; }
.pf-tree-leaf { width: 26px; height: 26px; border-radius: 50%; background: linear-gradient(135deg, var(--pf-gold-bright), var(--pf-gold-deep)); }

/* Zone 5: vet mock */
.pf-vet-mock { display: flex; align-items: stretch; gap: 12px; }
.pf-vet-card { flex: 1; background: var(--pf-ivory); border: 1px solid var(--pf-line); border-radius: 14px; padding: 18px; }
.pf-vet-card.pf-vet-modern { background: var(--pf-ink); border-color: var(--pf-ink); color: #f3ecdc; }
.pf-vet-era { font-size: 11.5px; font-weight: 800; color: var(--pf-gold-deep); }
.pf-vet-modern .pf-vet-era { color: var(--pf-gold-bright); }
.pf-vet-card h4 { font-family: var(--pf-serif); font-size: 20px; margin: 6px 0; }
.pf-vet-card p { margin: 0; font-size: 13px; color: var(--pf-text-soft); }
.pf-vet-modern p { color: rgba(243,236,220,.75); }
.pf-vet-vs { align-self: center; color: var(--pf-gold-deep); font-size: 22px; font-weight: 800; }

/* ===================== Tools ===================== */
.pf-tools { background: var(--pf-ivory); max-width: none; border-block: 1px solid var(--pf-line); text-align: center; }
.pf-tools > .pf-kicker, .pf-tools > h2 { max-width: var(--pf-maxw); margin-inline: auto; }
.pf-tools h2 { font-family: var(--pf-serif); font-size: clamp(24px,3.4vw,38px); margin: 0 0 40px; color: var(--pf-ink); }
.pf-tools-grid { max-width: var(--pf-maxw); margin: 0 auto; display: grid; grid-template-columns: repeat(3,1fr); gap: 22px; text-align: start; }
.pf-tool { background: var(--pf-paper); border: 1px solid var(--pf-line); border-radius: 16px; padding: 28px 26px; transition: transform .25s, box-shadow .25s; }
.pf-tool:hover { transform: translateY(-4px); box-shadow: 0 18px 40px -22px rgba(15,27,45,.35); }
.pf-tool-ic { width: 52px; height: 52px; display: grid; place-items: center; border-radius: 13px; background: var(--pf-ink); color: var(--pf-gold-bright); font-size: 26px; margin-bottom: 16px; }
.pf-tool h4 { font-family: var(--pf-serif); font-size: 21px; margin: 0 0 10px; color: var(--pf-ink); }
.pf-tool p { margin: 0; color: var(--pf-text-soft); font-size: 14.5px; }

/* ===================== Researchers ===================== */
.pf-researchers { text-align: center; }
.pf-researchers h2 { font-family: var(--pf-serif); font-size: clamp(24px,3.4vw,38px); margin: 0 0 40px; color: var(--pf-ink); }
.pf-people { display: grid; grid-template-columns: repeat(4,1fr); gap: 22px; }
.pf-person { background: var(--pf-paper); border: 1px solid var(--pf-line); border-radius: 16px; padding: 26px 18px; }
.pf-avatar { display: block; width: 84px; height: 84px; border-radius: 50%; margin: 0 auto 14px; border: 3px solid var(--pf-gold); background-size: cover; background-position: center; }
.pf-avatar[data-i="1"] { background-image: url("images/arabian-grey-run.jpg"); }
.pf-avatar[data-i="2"] { background-image: url("images/arabian-white-field.jpg"); }
.pf-avatar[data-i="3"] { background-image: url("images/arabian-black-water.jpg"); }
.pf-avatar[data-i="4"] { background-image: url("images/arabian-chestnut-desert.jpg"); }
.pf-person h4 { font-family: var(--pf-serif); font-size: 19px; margin: 0 0 4px; color: var(--pf-ink); }
.pf-person span { font-size: 13px; color: var(--pf-text-mute); }

/* ===================== CTA ===================== */
.pf-cta {
  background: linear-gradient(135deg, var(--pf-ink) 0%, var(--pf-ink-2) 100%);
  color: #f3ecdc; position: relative; overflow: hidden;
}
.pf-cta::before { content: ""; position: absolute; inset: 0; background: radial-gradient(circle at 80% 20%, rgba(194,160,74,.22), transparent 50%); }
.pf-cta-inner { position: relative; max-width: 740px; margin: 0 auto; padding: 80px 24px; text-align: center; }
.pf-cta h2 { font-family: var(--pf-serif); font-size: clamp(28px,4vw,46px); margin: 0 0 14px; color: #fff; }
.pf-cta p { color: rgba(243,236,220,.8); margin: 0 0 30px; }
.pf-cta-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.pf-btn { display: inline-flex; align-items: center; padding: 14px 32px; border-radius: 999px; font-weight: 800; font-size: 15px; transition: transform .18s, background .18s; }
.pf-btn-gold { background: var(--pf-gold); color: var(--pf-ink-2); }
.pf-btn-gold:hover { background: var(--pf-gold-bright); transform: translateY(-2px); }
.pf-btn-ghost { border: 1px solid rgba(243,236,220,.5); color: #f3ecdc; }
.pf-btn-ghost:hover { background: rgba(243,236,220,.12); }

/* ===================== Footer ===================== */
.pf-footer { background: var(--pf-ink-2); color: rgba(243,236,220,.75); }
.pf-footer-inner { max-width: var(--pf-maxw); margin: 0 auto; padding: 50px 24px 36px; display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 36px; }
.pf-footer-brand .brand-logo { height: 60px; filter: brightness(0) invert(1) sepia(.5) saturate(2) hue-rotate(5deg); opacity: .92; }
.pf-footer-brand p { margin: 12px 0 0; font-size: 14px; color: rgba(243,236,220,.55); max-width: 340px; }
.pf-footer-cols h5 { color: #fff; font-size: 15px; margin: 0 0 14px; }
.pf-footer-cols ul { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 9px; }
.pf-footer-cols a { font-size: 14px; color: rgba(243,236,220,.6); }
.pf-footer-cols a:hover { color: var(--pf-gold-bright); }
.pf-footer-bottom { border-top: 1px solid rgba(243,236,220,.12); padding: 16px 24px; text-align: center; font-size: 13px; color: rgba(243,236,220,.45); }

/* ===================== Theme chooser (shared) ===================== */
.theme-chooser { position: fixed; bottom: 22px; inset-inline-start: 22px; z-index: 999; font-family: var(--pf-font); }
.chooser-toggle { display: inline-flex; align-items: center; gap: 8px; background: var(--pf-ink); color: #f3ecdc; padding: 11px 18px; border-radius: 999px; box-shadow: 0 6px 18px rgba(15,27,45,.4); font-size: 14px; font-weight: 700; border: 1px solid var(--pf-ink-2); cursor: pointer; font-family: inherit; transition: background .18s, transform .18s; }
.chooser-toggle:hover { background: var(--pf-ink-2); transform: translateY(-2px); }
.chooser-icon { font-size: 16px; line-height: 1; color: var(--pf-gold-bright); }
.chooser-label { line-height: 1; }
.chooser-menu { list-style: none; padding: 8px; margin: 0; position: absolute; bottom: calc(100% + 10px); inset-inline-start: 0; min-width: 215px; background: var(--pf-paper); border: 1px solid var(--pf-line); border-radius: 12px; box-shadow: 0 16px 40px rgba(15,27,45,.22); opacity: 0; visibility: hidden; transform: translateY(6px); transition: opacity .18s, transform .18s, visibility .18s; }
.theme-chooser.is-open .chooser-menu { opacity: 1; visibility: visible; transform: translateY(0); }
.chooser-menu li { margin: 0; }
.chooser-menu a { display: flex; align-items: center; gap: 10px; padding: 9px 12px; border-radius: 8px; color: var(--pf-text); font-size: 14px; transition: background .14s; }
.chooser-menu a:hover { background: var(--pf-ivory); }
.chooser-menu a.is-active { background: var(--pf-ink); color: #f3ecdc; font-weight: 700; pointer-events: none; }
.chooser-dot { display: inline-block; width: 12px; height: 12px; border-radius: 50%; border: 1px solid rgba(0,0,0,.2); flex-shrink: 0; }
.chooser-dot[data-tone="modern"]   { background: linear-gradient(135deg, #c9a961, #6b3410); }
.chooser-dot[data-tone="wiki"]     { background: linear-gradient(135deg, #cedff2, #0645ad); }
.chooser-dot[data-tone="heritage"] { background: linear-gradient(135deg, #b8864a, #6e1e1e); }
.chooser-dot[data-tone="gallery"]  { background: linear-gradient(135deg, #e6c878, #15100a); }
.chooser-dot[data-tone="portal"]   { background: linear-gradient(135deg, #11a195, #095a54); }
.chooser-dot[data-tone="magazine"] { background: linear-gradient(135deg, #8b1e1e, #1a1a18); }
.chooser-dot[data-tone="guide"]    { background: linear-gradient(135deg, #6e69e0, #3a35a3); }
.chooser-dot[data-tone="bento"]    { background: linear-gradient(135deg, #c89048, #2b2118); }
.chooser-dot[data-tone="platform"] { background: linear-gradient(135deg, #c2a04a, #16243a); }
.chooser-dot[data-tone="digest"]   { background: linear-gradient(135deg, #ac7a36, #34271a); }
.chooser-menu a.is-active .chooser-dot { border-color: #f3ecdc; }

/* ===================== Responsive ===================== */
@media (max-width: 900px) {
  .pf-links, .pf-search-btn span { display: none; }
  .pf-burger { display: flex; }
  .pf-zone { grid-template-columns: 1fr; gap: 28px; }
  .pf-zone-rev .pf-zone-text { order: 0; }
  .pf-tools-grid { grid-template-columns: 1fr; }
  .pf-people { grid-template-columns: repeat(2,1fr); }
  .pf-footer-inner { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 540px) {
  .pf-hero { padding: 70px 20px 60px; }
  .pf-search { flex-direction: column; border-radius: 18px; padding: 12px; }
  .pf-search input { width: 100%; text-align: center; }
  .pf-search button { width: 100%; }
  .pf-split-mock { grid-template-columns: 1fr; }
  .pf-vet-mock { flex-direction: column; }
  .pf-vet-vs { transform: rotate(90deg); }
  .pf-people { grid-template-columns: 1fr; }
  .pf-footer-inner { grid-template-columns: 1fr; }
  .theme-chooser { bottom: 14px; inset-inline-start: 14px; }
  .chooser-label { display: none; }
  .pf-tl-node span { font-size: 10px; }
}