/* ============================================================
   chromosome.css — Blueprint Génétique
   Palette : #060d1f fond | #00e5ff cyan | #a855f7 violet | #f1f5f9 texte
   Polices  : Bebas Neue (titres) + IBM Plex Serif (corps)
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Bebas+Neue&family=IBM+Plex+Serif:ital,wght@0,400;0,600;1,400&family=JetBrains+Mono:wght@400;600&display=swap');

:root {
  --bg:       #060d1f;
  --bg2:      #0b1630;
  --bg3:      #0f1e40;
  --card:     #0d1a35;
  --border:   #1e3460;
  --cyan:     #00e5ff;
  --cyan2:    #00b4cc;
  --violet:   #a855f7;
  --violet2:  #7c3aed;
  --gold:     #f59e0b;
  --text:     #cbd5e1;
  --text-hi:  #f1f5f9;
  --muted:    #64748b;
  --red:      #ef4444;
  --green:    #22c55e;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: 'IBM Plex Serif', Georgia, serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  font-size: 1.02rem;
  overflow-x: hidden;
}

/* ── PROGRESS BAR ─────────────────────────────── */
#progress-bar {
  position: fixed;
  top: 0; left: 0;
  height: 3px;
  width: 0%;
  background: linear-gradient(90deg, var(--violet), var(--cyan));
  z-index: 1000;
  transition: width 0.1s linear;
}

/* ── BACKGROUND GRID OVERLAY ──────────────────── */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(0,229,255,.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,229,255,.035) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
  z-index: 0;
}

/* ── HELIX DECO ───────────────────────────────── */
.helix-deco {
  position: absolute;
  right: -60px;
  top: 50%;
  transform: translateY(-50%);
  width: 200px;
  height: 400px;
  opacity: 0.08;
  pointer-events: none;
}

/* ── NAV ──────────────────────────────────────── */
nav {
  position: fixed;
  top: 3px; left: 0; right: 0;
  z-index: 900;
  background: rgba(6, 13, 31, 0.92);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 0 32px;
  height: 54px;
  overflow-x: auto;
}
nav a {
  color: var(--muted);
  text-decoration: none;
  font-family: 'JetBrains Mono', monospace;
  font-size: .75rem;
  letter-spacing: .05em;
  padding: 6px 14px;
  border-radius: 6px;
  white-space: nowrap;
  transition: color .2s, background .2s;
  border: 1px solid transparent;
}
nav a:hover,
nav a.active {
  color: var(--cyan);
  background: rgba(0,229,255,.08);
  border-color: rgba(0,229,255,.2);
}
nav .logo {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 1.2rem;
  color: var(--cyan);
  letter-spacing: .12em;
  margin-right: 16px;
  flex-shrink: 0;
  text-decoration: none;
}

/* ── HERO ─────────────────────────────────────── */
.hero {
  position: relative;
  padding: 130px 48px 80px;
  overflow: hidden;
  border-bottom: 1px solid var(--border);
  z-index: 1;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 50% at 70% 50%, rgba(168,85,247,.15) 0%, transparent 60%),
    radial-gradient(ellipse 40% 60% at 20% 40%, rgba(0,229,255,.1) 0%, transparent 60%);
  pointer-events: none;
}
.hero-inner {
  position: relative;
  max-width: 880px;
  z-index: 2;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: 'JetBrains Mono', monospace;
  font-size: .72rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--cyan);
  border: 1px solid rgba(0,229,255,.3);
  padding: 5px 14px;
  border-radius: 999px;
  margin-bottom: 24px;
  background: rgba(0,229,255,.05);
}
.hero-badge::before {
  content: '';
  width: 6px; height: 6px;
  background: var(--cyan);
  border-radius: 50%;
  animation: pulse-dot 2s infinite;
}
@keyframes pulse-dot {
  0%,100%{ opacity:1; transform:scale(1); }
  50%{ opacity:.4; transform:scale(1.6); }
}
.hero h1 {
  font-family: 'Bebas Neue', sans-serif;
  font-size: clamp(3.5rem, 8vw, 7rem);
  line-height: 1;
  letter-spacing: .06em;
  color: var(--text-hi);
  margin-bottom: 20px;
}
.hero h1 span { color: var(--cyan); }
.hero .tagline {
  font-size: 1.15rem;
  color: var(--text);
  max-width: 640px;
  line-height: 1.7;
  font-style: italic;
}

/* ── STATS ROW ────────────────────────────────── */
.stats-row {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 40px;
}
.stat {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 22px;
  min-width: 130px;
  flex: 1;
}
.stat .val {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 2.2rem;
  color: var(--cyan);
  letter-spacing: .04em;
  line-height: 1;
  display: block;
}
.stat .lbl {
  font-family: 'JetBrains Mono', monospace;
  font-size: .68rem;
  color: var(--muted);
  letter-spacing: .08em;
  text-transform: uppercase;
  margin-top: 4px;
}

/* ── LAYOUT ───────────────────────────────────── */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 60px 32px;
  position: relative;
  z-index: 1;
}
.two-col {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 32px;
}
@media (max-width: 900px) { .two-col { grid-template-columns: 1fr; } }

/* ── SECTIONS ─────────────────────────────────── */
.section {
  margin-bottom: 72px;
  opacity: 0;
  transform: translateY(28px);
  transition: opacity .6s ease, transform .6s ease;
}
.section.visible { opacity: 1; transform: translateY(0); }

.section-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: .68rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--violet);
  margin-bottom: 10px;
}
.section h2 {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 2.2rem;
  letter-spacing: .06em;
  color: var(--text-hi);
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 24px;
  position: relative;
}
.section h2::after {
  content: '';
  position: absolute;
  bottom: -1px; left: 0;
  width: 60px; height: 2px;
  background: var(--cyan);
}
.section h3 {
  font-family: 'IBM Plex Serif', serif;
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--cyan);
  margin: 28px 0 10px;
}

/* ── CARDS ────────────────────────────────────── */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 22px 26px;
  margin-bottom: 20px;
  transition: border-color .25s, transform .25s;
}
.card:hover {
  border-color: rgba(0,229,255,.35);
  transform: translateY(-2px);
}
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
  margin: 20px 0;
}
.card-icon {
  font-size: 1.8rem;
  margin-bottom: 10px;
  display: block;
}

/* ── BOX VARIANTS ─────────────────────────────── */
.box {
  border-radius: 10px;
  padding: 16px 20px;
  margin: 18px 0;
  border: 1px solid;
}
.box-cyan   { background: rgba(0,229,255,.05);  border-color: rgba(0,229,255,.2);  }
.box-violet { background: rgba(168,85,247,.06); border-color: rgba(168,85,247,.2); }
.box-gold   { background: rgba(245,158,11,.05); border-color: rgba(245,158,11,.25);}
.box-red    { background: rgba(239,68,68,.05);  border-color: rgba(239,68,68,.2);  }
.box-green  { background: rgba(34,197,94,.05);  border-color: rgba(34,197,94,.2);  }

/* ── TABLE ────────────────────────────────────── */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
  font-size: .93rem;
}
th {
  background: var(--bg3);
  color: var(--cyan);
  font-family: 'JetBrains Mono', monospace;
  font-size: .72rem;
  letter-spacing: .06em;
  text-transform: uppercase;
  padding: 10px 14px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}
td {
  padding: 10px 14px;
  border-bottom: 1px solid rgba(30,52,96,.6);
  vertical-align: top;
  color: var(--text);
}
tr:hover td { background: rgba(0,229,255,.03); }

/* ── TIMELINE ─────────────────────────────────── */
.timeline { position: relative; padding-left: 28px; }
.timeline::before {
  content: '';
  position: absolute;
  left: 0; top: 8px; bottom: 8px;
  width: 2px;
  background: linear-gradient(to bottom, var(--violet), var(--cyan));
}
.tl-item {
  position: relative;
  margin-bottom: 28px;
}
.tl-item::before {
  content: '';
  position: absolute;
  left: -35px; top: 6px;
  width: 10px; height: 10px;
  background: var(--cyan);
  border-radius: 50%;
  border: 2px solid var(--bg);
  box-shadow: 0 0 8px var(--cyan);
}
.tl-year {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 1.1rem;
  color: var(--violet);
  letter-spacing: .06em;
}
.tl-desc { color: var(--text); font-size: .95rem; }

/* ── ORGANITE GRID ────────────────────────────── */
.org-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
  margin: 20px 0;
}
.org-card {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px;
  transition: border-color .2s, transform .2s;
  cursor: default;
}
.org-card:hover {
  border-color: var(--cyan);
  transform: translateY(-3px);
  box-shadow: 0 0 20px rgba(0,229,255,.08);
}
.org-card .oc-title {
  font-family: 'JetBrains Mono', monospace;
  font-size: .8rem;
  color: var(--cyan);
  letter-spacing: .06em;
  text-transform: uppercase;
  margin-bottom: 8px;
}

/* ── PHASE CARDS ──────────────────────────────── */
.phase-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
  margin: 20px 0;
}
.phase-card {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 16px;
  background: var(--bg2);
  text-align: center;
}
.phase-card .ph-name {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 1.3rem;
  color: var(--violet);
  letter-spacing: .06em;
}
.phase-card .ph-desc {
  font-size: .82rem;
  color: var(--muted);
  margin-top: 6px;
}

/* ── ANOMALY BADGE ────────────────────────────── */
.anomaly-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 14px;
  margin: 20px 0;
}
.anomaly-card {
  border: 1px solid;
  border-radius: 12px;
  padding: 16px 18px;
}
.anomaly-card.trisomie  { border-color: rgba(239,68,68,.3);  background: rgba(239,68,68,.04);  }
.anomaly-card.monosomie { border-color: rgba(245,158,11,.3); background: rgba(245,158,11,.04); }
.anomaly-card.structure { border-color: rgba(168,85,247,.3); background: rgba(168,85,247,.04); }
.anomaly-card .an-title {
  font-family: 'JetBrains Mono', monospace;
  font-size: .78rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  margin-bottom: 8px;
}
.anomaly-card.trisomie  .an-title { color: var(--red); }
.anomaly-card.monosomie .an-title { color: var(--gold); }
.anomaly-card.structure .an-title { color: var(--violet); }

/* ── SIDEBAR ──────────────────────────────────── */
.sidebar { position: sticky; top: 80px; }
.sidebar-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 20px 22px;
  margin-bottom: 18px;
}
.sidebar-card h3 {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 1rem;
  letter-spacing: .1em;
  color: var(--cyan);
  margin-bottom: 12px;
}
.sidebar-toc a {
  display: block;
  padding: 6px 10px;
  color: var(--muted);
  text-decoration: none;
  font-family: 'JetBrains Mono', monospace;
  font-size: .72rem;
  letter-spacing: .04em;
  border-radius: 6px;
  transition: color .2s, background .2s;
}
.sidebar-toc a:hover,
.sidebar-toc a.active {
  color: var(--cyan);
  background: rgba(0,229,255,.07);
}

/* ── LISTS ────────────────────────────────────── */
ul { padding-left: 22px; }
li { margin: 6px 0; }
ul li::marker { color: var(--cyan); }

/* ── MISC ─────────────────────────────────────── */
code {
  font-family: 'JetBrains Mono', monospace;
  background: var(--bg3);
  color: var(--cyan);
  padding: 2px 7px;
  border-radius: 5px;
  font-size: .88em;
}
strong { color: var(--text-hi); }
em { color: var(--text); font-style: italic; }

/* ── BACK TO TOP ──────────────────────────────── */
#back-top {
  position: fixed;
  bottom: 28px; right: 28px;
  width: 44px; height: 44px;
  background: var(--violet);
  color: #fff;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  font-size: 1.2rem;
  display: flex; align-items: center; justify-content: center;
  opacity: 0; pointer-events: none;
  transition: opacity .3s, transform .3s;
  z-index: 800;
}
#back-top.visible { opacity: 1; pointer-events: auto; }
#back-top:hover { transform: translateY(-4px); }

/* ── FOOTER ───────────────────────────────────── */
footer {
  border-top: 1px solid var(--border);
  padding: 32px;
  text-align: center;
  color: var(--muted);
  font-family: 'JetBrains Mono', monospace;
  font-size: .75rem;
  letter-spacing: .06em;
  position: relative;
  z-index: 1;
}

/* ── RESPONSIVE ───────────────────────────────── */
@media (max-width: 768px) {
  .hero { padding: 100px 24px 60px; }
  .container { padding: 40px 20px; }
  nav { padding: 0 16px; }
  .stats-row { flex-direction: column; }
}