/* =====================================================
   Hussein El Gouch — personal site
   Editorial system: ivory paper, midnight ink, warm gold
   ===================================================== */

:root {
  --paper: #FAF6EE;
  --paper-deep: #F1EADC;
  --ink: #0E1B2C;
  --ink-soft: #445062;
  --ink-faint: #6B7686;
  --navy: #0B1526;
  --navy-2: #101E33;
  --gold: #A87F1E;
  --gold-bright: #C9A227;
  --gold-soft: #E3C567;
  --line: rgba(14, 27, 44, 0.14);
  --line-light: rgba(250, 246, 238, 0.16);
  --serif: "Fraunces", Georgia, serif;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --wrap: 1080px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--sans);
  font-size: 16.5px;
  line-height: 1.65;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}

::selection { background: var(--gold-soft); color: var(--navy); }

h1, h2, h3 { font-family: var(--serif); font-weight: 500; line-height: 1.15; }

a { color: inherit; }

/* ---------- Nav ---------- */

.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  transition: background 250ms ease, box-shadow 250ms ease;
}
.nav.scrolled {
  background: rgba(250, 246, 238, 0.92);
  backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 var(--line);
}
.nav.on-dark:not(.scrolled) { color: var(--paper); }
.nav-inner {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 18px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-brand {
  font-family: var(--serif);
  font-size: 20px;
  letter-spacing: 0.06em;
  text-decoration: none;
  color: inherit;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 30px;
}
.nav-links a {
  font-size: 13.5px;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-decoration: none;
  opacity: 0.82;
  transition: opacity 200ms ease, color 200ms ease;
}
.nav-links a:hover { opacity: 1; color: var(--gold); }
.nav.on-dark:not(.scrolled) .nav-links a:hover { color: var(--gold-soft); }
.nav-cta {
  border: 1px solid currentColor;
  border-radius: 999px;
  padding: 7px 18px;
}
.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: inherit;
  cursor: pointer;
  padding: 6px;
}

/* ---------- Hero ---------- */

.hero {
  position: relative;
  background:
    radial-gradient(1100px 520px at 78% -10%, rgba(201, 162, 39, 0.16), transparent 60%),
    radial-gradient(900px 600px at -10% 110%, rgba(60, 90, 140, 0.25), transparent 55%),
    var(--navy);
  color: var(--paper);
  padding: 168px 28px 108px;
  overflow: hidden;
}
.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(250,246,238,0.055) 1px, transparent 1px);
  background-size: 26px 26px;
  pointer-events: none;
}
.hero-inner {
  position: relative;
  z-index: 1;
  max-width: var(--wrap);
  margin: 0 auto;
}
.hero-eyebrow {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--gold-soft);
  margin-bottom: 26px;
}
.hero-title {
  font-size: clamp(52px, 9vw, 108px);
  font-weight: 420;
  letter-spacing: -0.015em;
  margin-bottom: 30px;
}
.hero-title em {
  font-style: italic;
  font-weight: 340;
  color: var(--gold-soft);
}
.hero-lede {
  max-width: 620px;
  font-size: 19px;
  line-height: 1.7;
  color: rgba(250, 246, 238, 0.85);
  margin-bottom: 40px;
}
.hero-lede strong { color: var(--paper); font-weight: 600; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 54px; }

.btn {
  display: inline-block;
  font-size: 14.5px;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-decoration: none;
  border-radius: 999px;
  padding: 13px 28px;
  cursor: pointer;
  transition: background 200ms ease, color 200ms ease, border-color 200ms ease, box-shadow 200ms ease;
}
.btn-gold {
  background: var(--gold-bright);
  color: var(--navy);
  border: 1px solid var(--gold-bright);
}
.btn-gold:hover { background: var(--gold-soft); border-color: var(--gold-soft); box-shadow: 0 6px 24px rgba(201, 162, 39, 0.35); }
.btn-ghost {
  border: 1px solid rgba(250, 246, 238, 0.4);
  color: var(--paper);
}
.btn-ghost:hover { border-color: var(--gold-soft); color: var(--gold-soft); }
.btn-ghost-light {
  border: 1px solid rgba(250, 246, 238, 0.4);
  color: var(--paper);
}
.btn-ghost-light:hover { border-color: var(--gold-soft); color: var(--gold-soft); }

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 34px;
  list-style: none;
  font-size: 14px;
  color: rgba(250, 246, 238, 0.72);
}
.hero-meta li { display: flex; align-items: center; gap: 9px; }
.hero-meta svg { width: 17px; height: 17px; color: var(--gold-soft); flex-shrink: 0; }
.hero-meta a { text-decoration: none; border-bottom: 1px solid rgba(250,246,238,0.3); transition: color 200ms ease, border-color 200ms ease; }
.hero-meta a:hover { color: var(--gold-soft); border-color: var(--gold-soft); }

.hero-rule {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 5px;
  background: linear-gradient(90deg, var(--gold) 0%, var(--gold-soft) 45%, transparent 100%);
}

/* ---------- Sections ---------- */

.section { padding: 104px 28px; }
.section-inner { max-width: var(--wrap); margin: 0 auto; }

.section-label {
  display: flex;
  align-items: baseline;
  gap: 18px;
  margin-bottom: 26px;
}
.label-index {
  font-family: var(--serif);
  font-size: 15px;
  font-style: italic;
  color: var(--gold);
}
.section-label h2 {
  font-size: clamp(30px, 4.4vw, 44px);
  letter-spacing: -0.01em;
}
.section-intro {
  max-width: 620px;
  font-size: 17.5px;
  color: var(--ink-soft);
  margin-bottom: 54px;
}

/* ---------- About ---------- */

.about { border-bottom: 1px solid var(--line); }
.about-grid {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 48px;
}
.about-grid .section-label { flex-direction: column; gap: 6px; margin-bottom: 0; }
.about-body p {
  font-size: 18px;
  line-height: 1.75;
  color: var(--ink-soft);
  max-width: 640px;
}
.about-body p + p { margin-top: 20px; }
.about-body strong { color: var(--ink); font-weight: 600; }
.about-facts {
  margin-top: 44px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.about-facts > div { background: var(--paper); padding: 18px 20px; }
.about-facts dt {
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 5px;
}
.about-facts dd { font-size: 14.5px; color: var(--ink); }

/* ---------- Research ---------- */

.research { background: var(--paper); }

.paper {
  border: 1px solid var(--line);
  background: #FFFDF8;
  padding: 30px 30px 26px;
  display: flex;
  flex-direction: column;
  transition: border-color 200ms ease, box-shadow 200ms ease, transform 200ms ease;
}
.paper:hover {
  border-color: rgba(168, 127, 30, 0.55);
  box-shadow: 0 14px 40px rgba(14, 27, 44, 0.08);
}
.paper-featured {
  margin-bottom: 26px;
  background: linear-gradient(120deg, #FFFDF8 0%, #FBF3DF 100%);
  border-color: rgba(168, 127, 30, 0.45);
}
.paper-tag {
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 14px;
}
.paper h3 {
  font-size: 21.5px;
  line-height: 1.3;
  margin-bottom: 8px;
}
.paper-featured h3 { font-size: 27px; max-width: 700px; }
.paper-authors {
  font-size: 13.5px;
  font-style: italic;
  color: var(--ink-faint);
  margin-bottom: 14px;
}
.paper-abstract {
  font-size: 15px;
  line-height: 1.65;
  color: var(--ink-soft);
  margin-bottom: 20px;
  max-width: 720px;
  flex-grow: 1;
}
.paper-links { display: flex; gap: 18px; align-items: center; }
.paper-links a {
  font-size: 13.5px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--gold);
  text-decoration: none;
  border-bottom: 1px solid rgba(168, 127, 30, 0.35);
  padding-bottom: 2px;
  transition: color 200ms ease, border-color 200ms ease;
}
.paper-links a:hover { color: var(--navy); border-color: var(--navy); }
.paper-note { font-size: 13px; color: var(--ink-faint); font-style: italic; }

.paper-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 26px;
}

/* ---------- Leadership (dark) ---------- */

.leadership {
  background:
    radial-gradient(900px 500px at 110% 0%, rgba(201, 162, 39, 0.12), transparent 55%),
    var(--navy);
  color: var(--paper);
}
.section-label-light .label-index { color: var(--gold-soft); }
.section-intro-light { color: rgba(250, 246, 238, 0.78); }
.section-intro-light strong { color: var(--paper); }

.timeline {
  list-style: none;
  border-left: 1px solid var(--line-light);
  margin-left: 8px;
  padding-left: 40px;
  display: flex;
  flex-direction: column;
  gap: 46px;
  margin-bottom: 70px;
}
.timeline-item { position: relative; max-width: 680px; }
.timeline-item::before {
  content: "";
  position: absolute;
  left: -45px;
  top: 8px;
  width: 9px; height: 9px;
  border-radius: 50%;
  background: var(--gold-bright);
  box-shadow: 0 0 0 5px rgba(201, 162, 39, 0.18);
}
.timeline-date {
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gold-soft);
  margin-bottom: 8px;
}
.timeline-item h3 { font-size: 22px; margin-bottom: 8px; }
.timeline-item p { font-size: 15.5px; line-height: 1.7; color: rgba(250, 246, 238, 0.75); }
.timeline-item em { color: var(--paper); }
.timeline-links { display: flex; gap: 18px; align-items: center; margin-top: 14px; }
.timeline-links a {
  font-size: 13.5px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--gold-soft);
  text-decoration: none;
  border-bottom: 1px solid rgba(227, 197, 103, 0.35);
  padding-bottom: 2px;
  transition: color 200ms ease, border-color 200ms ease;
}
.timeline-links a:hover { color: var(--paper); border-color: var(--paper); }

.stat-row {
  display: flex;
  flex-wrap: wrap;
  gap: 1px;
  background: var(--line-light);
  border: 1px solid var(--line-light);
}
.stat {
  flex: 1 1 180px;
  background: var(--navy-2);
  padding: 26px 28px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.stat-num {
  font-family: var(--serif);
  font-size: 40px;
  color: var(--gold-soft);
}
.stat-label { font-size: 13.5px; color: rgba(250, 246, 238, 0.7); }

/* ---------- Ventures ---------- */

.ventures { border-bottom: 1px solid var(--line); }
.venture-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
  margin-top: 40px;
}
.venture {
  border-top: 3px solid var(--gold-bright);
  background: #FFFDF8;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  border-left: 1px solid var(--line);
  padding: 28px 26px;
  transition: box-shadow 200ms ease, border-color 200ms ease;
}
.venture:hover { box-shadow: 0 14px 40px rgba(14, 27, 44, 0.08); }
.venture-head { margin-bottom: 14px; }
.venture-head h3 { font-size: 24px; margin-bottom: 4px; }
.venture-role {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gold);
}
.venture p { font-size: 15px; line-height: 1.7; color: var(--ink-soft); }
.venture strong { color: var(--ink); }

/* ---------- Choten ---------- */

.choten { background: var(--paper-deep); border-bottom: 1px solid var(--line); }
.choten-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  margin-top: 8px;
}
.choten-col h3 {
  font-size: 21px;
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--gold-bright);
  display: inline-block;
}
.choten-col p { font-size: 15.5px; line-height: 1.72; color: var(--ink-soft); }
.choten-col em { font-style: italic; color: var(--ink); }
.choten-col strong { color: var(--ink); }
.choten-link {
  display: inline-block;
  margin-top: 16px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.03em;
  color: var(--gold);
  text-decoration: none;
  border-bottom: 1px solid rgba(168, 127, 30, 0.35);
  padding-bottom: 2px;
  transition: color 200ms ease, border-color 200ms ease;
}
.choten-link:hover { color: var(--navy); border-color: var(--navy); }

.choten-facts {
  margin-top: 46px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.choten-facts > div { background: #FFFDF8; padding: 18px 20px; }
.choten-facts dt {
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 5px;
}
.choten-facts dd { font-size: 14.5px; color: var(--ink); }

.choten-materials { margin-top: 46px; }
.choten-materials-title {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--ink);
  margin-bottom: 4px;
}
.choten-dl-list { list-style: none; border-top: 1px solid var(--line); }
.choten-dl-list li { border-bottom: 1px solid var(--line); }
.choten-dl-list a {
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding: 16px 8px;
  text-decoration: none;
  transition: background 200ms ease;
}
.choten-dl-list a:hover { background: #FFFDF8; }
.choten-dl-list .dl-name {
  font-family: var(--serif);
  font-size: 18px;
  color: var(--ink);
  transition: color 200ms ease;
}
.choten-dl-list a:hover .dl-name { color: var(--gold); }
.choten-dl-list .dl-meta { font-size: 13.5px; color: var(--ink-faint); }

/* ---------- Press ---------- */

.press { background: var(--paper-deep); }
.press-list { list-style: none; margin-top: 34px; border-top: 1px solid var(--line); }
.press-list li { border-bottom: 1px solid var(--line); }
.press-list a {
  display: grid;
  grid-template-columns: 220px 1fr 60px;
  gap: 24px;
  align-items: baseline;
  padding: 22px 8px;
  text-decoration: none;
  transition: background 200ms ease;
}
.press-list a:hover { background: rgba(255, 253, 248, 0.9); }
.press-source {
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gold);
}
.press-title {
  font-family: var(--serif);
  font-size: 19px;
  transition: color 200ms ease;
}
.press-list a:hover .press-title { color: var(--gold); }
.press-year { font-size: 13.5px; color: var(--ink-faint); text-align: right; }

/* ---------- Contact ---------- */

.contact {
  background:
    radial-gradient(800px 480px at 50% 120%, rgba(201, 162, 39, 0.16), transparent 60%),
    var(--navy);
  color: var(--paper);
  text-align: center;
  padding: 130px 28px;
}
.contact-title {
  font-size: clamp(40px, 6.5vw, 68px);
  font-weight: 420;
  margin-bottom: 22px;
}
.contact-lede {
  max-width: 520px;
  margin: 0 auto 44px;
  font-size: 17.5px;
  color: rgba(250, 246, 238, 0.78);
}
.contact-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* ---------- Footer ---------- */

.footer {
  background: var(--navy);
  color: rgba(250, 246, 238, 0.55);
  border-top: 1px solid var(--line-light);
  padding: 26px 28px;
  font-size: 13.5px;
}
.footer-inner {
  max-width: var(--wrap);
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 16px;
}
.footer-sep { flex-grow: 1; height: 1px; background: var(--line-light); }

/* ---------- Reveal animation ---------- */

.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 650ms ease, transform 650ms ease;
}
.reveal.visible { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* ---------- Responsive ---------- */

@media (max-width: 900px) {
  .paper-grid { grid-template-columns: 1fr; }
  .venture-grid { grid-template-columns: 1fr; }
  .choten-grid { grid-template-columns: 1fr; gap: 28px; }
  .about-grid { grid-template-columns: 1fr; gap: 28px; }
  .press-list a { grid-template-columns: 1fr; gap: 6px; }
  .press-year { text-align: left; }
}

@media (max-width: 720px) {
  .nav-links {
    position: absolute;
    top: 100%;
    left: 0; right: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    background: var(--paper);
    color: var(--ink);
    border-bottom: 1px solid var(--line);
    display: none;
    padding: 8px 0;
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 14px 28px; width: 100%; font-size: 15px; }
  .nav-cta { border: none; border-radius: 0; padding: 14px 28px; }
  .nav-toggle { display: block; }
  .nav { background: rgba(250, 246, 238, 0.92); backdrop-filter: blur(12px); color: var(--ink) !important; }
  .hero { padding: 130px 22px 80px; }
  .section { padding: 72px 22px; }
  .timeline { padding-left: 28px; }
  .timeline-item::before { left: -33px; }
}