/* ============================================================
   Academic Profile — Prof. Azeddine Beghdadi
   Refined editorial design system
   ============================================================ */

:root {
  --bg:        #ffffff;
  --bg-alt:    #f7f6f4;
  --ink:       #1a1d24;
  --ink-soft:  #4a4f5a;
  --rule:      #e4e0d8;
  --gold:      #a07b2c;
  --gold-soft: #c79d4a;
  --burgundy:  #5b1f24;
  --navy:      #102542;
  --accent:    var(--burgundy);
  --shadow:    0 1px 2px rgba(20,20,30,.04), 0 8px 32px rgba(20,20,30,.06);
  --shadow-lg: 0 2px 4px rgba(20,20,30,.05), 0 24px 60px rgba(20,20,30,.10);
  --radius:    2px;
  --serif:     "Cormorant Garamond", "EB Garamond", Georgia, "Times New Roman", serif;
  --sans:      "Inter", -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
  --mono:      "JetBrains Mono", "SF Mono", Menlo, monospace;
}

[data-theme="dark"] {
  --bg:        #0e1014;
  --bg-alt:    #161922;
  --ink:       #ece7da;
  --ink-soft:  #9aa0ac;
  --rule:      #2a2e39;
  --gold:      #d2a358;
  --gold-soft: #e2bf7c;
  --burgundy:  #c97179;
  --navy:      #8aa6cf;
  --accent:    var(--gold);
  --shadow:    0 1px 2px rgba(0,0,0,.4), 0 8px 32px rgba(0,0,0,.4);
  --shadow-lg: 0 2px 4px rgba(0,0,0,.5), 0 24px 60px rgba(0,0,0,.5);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body {
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
  color: var(--ink);
  background: var(--bg);
  overflow-x: hidden;
}

/* ===== Typography ===== */
h1, h2, h3, h4 { font-family: var(--serif); font-weight: 500; letter-spacing: -0.01em; line-height: 1.15; color: var(--ink); }
h1 { font-size: clamp(2.6rem, 6vw, 5rem); }
h2 { font-size: clamp(1.9rem, 3.4vw, 2.8rem); margin-bottom: 1rem; }
h3 { font-size: 1.35rem; }
h4 { font-size: 1.05rem; }
a  { color: var(--accent); text-decoration: none; transition: color .2s ease; }
a:hover { color: var(--ink); }

.eyebrow {
  font-family: var(--sans);
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
}
.eyebrow::before {
  content: "";
  display: inline-block;
  width: 28px; height: 1px;
  background: var(--accent);
}

/* ===== Layout ===== */
.container { width: min(1180px, 92%); margin: 0 auto; }
section { padding: 7rem 0; position: relative; }
section + section { border-top: 1px solid var(--rule); }

/* ===== Navigation ===== */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  padding: 1.1rem 0;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 1px solid transparent;
  transition: border-color .3s, padding .3s;
}
[data-theme="dark"] .nav { background: rgba(14,16,20,.92); }
.nav.scrolled { border-bottom-color: var(--rule); padding: 0.7rem 0; }
.nav-inner { display: flex; align-items: center; justify-content: space-between; }
.brand { font-family: var(--serif); font-size: 1.25rem; font-weight: 500; letter-spacing: .02em; }
.brand span { color: var(--accent); }
.nav-links { display: flex; gap: 2rem; align-items: center; }
.nav-links a {
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
  text-transform: uppercase;
  font-weight: 500;
  position: relative;
}
.nav-links a:hover { color: var(--ink); }
.nav-links a::after {
  content: ""; position: absolute; bottom: -6px; left: 0; right: 0;
  height: 1px; background: var(--accent); transform: scaleX(0);
  transform-origin: right; transition: transform .3s ease;
}
.nav-links a:hover::after { transform: scaleX(1); transform-origin: left; }

.theme-toggle {
  background: transparent;
  border: 1px solid var(--rule);
  color: var(--ink);
  width: 36px; height: 36px;
  border-radius: 999px;
  cursor: pointer;
  display: inline-flex; align-items: center; justify-content: center;
  transition: all .2s;
}
.theme-toggle:hover { border-color: var(--accent); color: var(--accent); }

/* ===== Hero ===== */
.hero {
  min-height: 100vh;
  padding: 11rem 0 6rem;
  display: flex; align-items: center;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: ""; position: absolute; inset: 0;
  background:
    radial-gradient(900px 600px at 80% 20%, color-mix(in oklab, var(--accent) 6%, transparent), transparent 60%),
    radial-gradient(700px 500px at 10% 90%, color-mix(in oklab, var(--gold) 5%, transparent), transparent 60%);
  pointer-events: none;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 4rem;
  align-items: center;
  position: relative;
}
.hero-text .eyebrow { margin-bottom: 1.6rem; }
.hero-name {
  font-family: var(--serif);
  font-style: italic;
  font-weight: 400;
}
.hero-name .surname {
  display: block;
  font-style: normal;
  font-weight: 500;
  letter-spacing: -0.02em;
}
.hero-title {
  font-size: 1.15rem;
  color: var(--ink-soft);
  margin: 1.6rem 0 0.4rem;
  max-width: 38ch;
}
.hero-affil {
  font-size: 0.95rem;
  color: var(--ink-soft);
  font-style: italic;
  border-left: 2px solid var(--accent);
  padding-left: 1rem;
  margin-top: 1.2rem;
  max-width: 42ch;
}
.hero-tagline {
  font-family: var(--serif);
  font-size: 1.05rem;
  font-style: italic;
  color: var(--ink-soft);
  margin-top: 2rem;
  letter-spacing: .01em;
}
.hero-actions { margin-top: 2.6rem; display: flex; gap: 1rem; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 0.6rem;
  padding: 0.85rem 1.6rem;
  font-size: 0.82rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-weight: 600;
  border-radius: var(--radius);
  cursor: pointer;
  transition: all .25s ease;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--bg);
}
.btn:hover { background: var(--accent); border-color: var(--accent); color: #fff; transform: translateY(-1px); }
.btn-ghost { background: transparent; color: var(--ink); }
.btn-ghost:hover { background: var(--ink); color: var(--bg); }

/* Portrait frame */
.portrait {
  position: relative;
  aspect-ratio: 4/5;
  background: var(--bg-alt);
  border: 1px solid var(--rule);
  box-shadow: var(--shadow-lg);
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
}
.portrait img { width: 100%; height: 100%; object-fit: cover; }
.portrait .monogram {
  font-family: var(--serif);
  font-size: 8rem;
  font-style: italic;
  color: color-mix(in oklab, var(--accent) 70%, var(--ink) 30%);
  opacity: 0.7;
}
.portrait::after {
  content: ""; position: absolute; inset: 12px;
  border: 1px solid color-mix(in oklab, var(--accent) 50%, transparent);
  pointer-events: none;
}

/* ===== Stats strip ===== */
.stats {
  background: var(--bg-alt);
  padding: 3rem 0;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  text-align: center;
}
.stat-value {
  font-family: var(--serif);
  font-size: clamp(2.4rem, 4vw, 3.2rem);
  font-weight: 500;
  color: var(--accent);
  line-height: 1;
}
.stat-label {
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin-top: 0.6rem;
}

/* ===== Section header ===== */
.section-head { margin-bottom: 4rem; max-width: 720px; }
.section-head h2 { margin-top: 0.8rem; }
.section-head p { color: var(--ink-soft); margin-top: 1rem; font-size: 1.05rem; }

/* ===== About ===== */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 4rem;
  align-items: start;
}
.about-body {
  font-family: var(--serif);
  font-size: 1.25rem;
  line-height: 1.65;
  color: var(--ink);
}
.about-body::first-letter {
  font-family: var(--serif);
  font-size: 4.4rem;
  float: left;
  line-height: 0.95;
  font-weight: 500;
  margin: 0.35rem 0.6rem 0 0;
  color: var(--accent);
}

/* ===== Research grid ===== */
.research-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 0;
  border-top: 1px solid var(--rule);
  border-left: 1px solid var(--rule);
}
.research-card {
  padding: 2.4rem 2rem;
  border-right: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  position: relative;
  transition: background .25s;
}
.research-card:hover { background: var(--bg-alt); }
.research-card .icon {
  font-size: 1.8rem;
  color: var(--accent);
  margin-bottom: 1rem;
  display: block;
}
.research-card h3 { margin-bottom: 0.7rem; }
.research-card p { color: var(--ink-soft); font-size: 0.95rem; }

/* ===== Publications ===== */
.pub-list { border-top: 1px solid var(--rule); }
.pub-item {
  display: grid;
  grid-template-columns: 90px 1fr auto;
  gap: 2rem;
  padding: 1.8rem 0;
  border-bottom: 1px solid var(--rule);
  align-items: baseline;
  transition: padding .2s;
}
.pub-item:hover { padding-left: 0.6rem; }
.pub-year {
  font-family: var(--serif);
  font-size: 1.5rem;
  color: var(--accent);
}
.pub-title { font-weight: 500; font-size: 1.05rem; margin-bottom: 0.4rem; color: var(--ink); }
.pub-authors { color: var(--ink-soft); font-size: 0.9rem; font-style: italic; }
.pub-venue {
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-soft);
  white-space: nowrap;
}

/* ===== Datasets / Projects ===== */
.dataset-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
}
.dataset-card {
  background: var(--bg-alt);
  border: 1px solid var(--rule);
  padding: 2.2rem;
  position: relative;
  transition: transform .3s, box-shadow .3s;
  display: flex; flex-direction: column;
}
.dataset-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.dataset-card .year-tag {
  position: absolute; top: 1.4rem; right: 1.4rem;
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--accent);
  letter-spacing: 0.1em;
}
.dataset-card .name {
  font-family: var(--serif);
  font-size: 2rem;
  font-weight: 500;
  letter-spacing: -0.01em;
}
.dataset-card .subtitle {
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0.4rem 0 1.2rem;
}
.dataset-card p { color: var(--ink-soft); font-size: 0.95rem; flex: 1; }
.dataset-card .access {
  margin-top: 1.4rem;
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-weight: 600;
  display: inline-flex; align-items: center; gap: 0.5rem;
}
.dataset-card .access::after { content: "→"; transition: transform .2s; }
.dataset-card .access:hover::after { transform: translateX(4px); }

/* ===== News timeline ===== */
.news-list { position: relative; }
.news-item {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 2rem;
  padding: 2rem 0;
  border-bottom: 1px solid var(--rule);
}
.news-item:last-child { border-bottom: none; }
.news-date {
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--accent);
  letter-spacing: 0.05em;
  padding-top: 0.2rem;
}
.news-body h3 { margin-bottom: 0.5rem; }
.news-body p { color: var(--ink-soft); }

/* ===== Service ===== */
.service-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 0.5rem 2.5rem;
  list-style: none;
}
.service-grid li {
  padding: 0.9rem 0;
  border-bottom: 1px dashed var(--rule);
  font-size: 0.95rem;
  color: var(--ink-soft);
  display: flex; gap: 0.8rem; align-items: flex-start;
}
.service-grid li::before {
  content: "§";
  color: var(--accent);
  font-family: var(--serif);
  font-size: 1.1rem;
  flex-shrink: 0;
}

/* ===== Contact ===== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}
.contact-card {
  background: var(--bg-alt);
  border: 1px solid var(--rule);
  padding: 2.6rem;
}
.contact-row { padding: 1rem 0; border-bottom: 1px solid var(--rule); }
.contact-row:last-child { border-bottom: none; }
.contact-row .label {
  font-size: 0.7rem; letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--ink-soft); margin-bottom: 0.3rem;
}
.contact-row .value { font-size: 1rem; color: var(--ink); }

/* ===== Footer ===== */
footer {
  background: var(--ink);
  color: var(--bg);
  padding: 3rem 0;
  text-align: center;
  font-size: 0.85rem;
  letter-spacing: 0.05em;
}
footer a { color: var(--gold-soft); }
.footer-admin { margin-top: 1rem; opacity: 0.5; font-size: 0.75rem; }
.footer-admin a { color: inherit; }

/* ===== Reveal animation ===== */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .8s ease, transform .8s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ===== Responsive ===== */
@media (max-width: 900px) {
  .hero-grid, .about-grid, .contact-grid { grid-template-columns: 1fr; gap: 3rem; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .pub-item { grid-template-columns: 60px 1fr; }
  .pub-venue { grid-column: 1 / -1; }
  .nav-links { display: none; }
  section { padding: 5rem 0; }
}