/* ============================================================
   systeme_immunitaire.css — Forteresse Vivante
   Palette : #050b18 navy | #00d4ff bleu électrique | #ff1744 rouge alerte | #00e676 signal vert
   Polices  : Rajdhani (display militaire) + Exo 2 (corps) + Share Tech Mono
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Rajdhani:wght@400;500;600;700&family=Exo+2:ital,wght@0,400;0,500;0,700;1,400&family=Share+Tech+Mono&display=swap');

:root {
  --void:    #050b18;
  --void2:   #080f22;
  --void3:   #0d1630;
  --card:    #080f22;
  --border:  #1a2a4a;
  --border2: #1e3660;
  --cyan:    #00d4ff;
  --cyan2:   #00b4e0;
  --cyan3:   #0090c0;
  --red:     #ff1744;
  --red2:    #cc0033;
  --green:   #00e676;
  --green2:  #00c853;
  --amber:   #ffc107;
  --purple:  #aa00ff;
  --text:    #7badc8;
  --text-hi: #e0f4ff;
  --muted:   #2d5070;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: 'Exo 2', system-ui, sans-serif;
  background: var(--void);
  color: var(--text);
  line-height: 1.75;
  font-size: 1.01rem;
  overflow-x: hidden;
}

/* ── GRID OVERLAY ─────────────────────────────── */
body::before {
  content: '';
  position: fixed; inset: 0;
  background-image:
    linear-gradient(rgba(0,212,255,.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,212,255,.025) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none; z-index: 0;
}
body::after {
  content: '';
  position: fixed; inset: 0;
  background:
    radial-gradient(ellipse 70% 50% at 20% 10%, rgba(0,212,255,.06) 0%, transparent 60%),
    radial-gradient(ellipse 50% 60% at 80% 90%, rgba(255,23,68,.05) 0%, transparent 60%);
  pointer-events: none; z-index: 0;
}

/* ── PROGRESS BAR ─────────────────────────────── */
#progress-bar {
  position: fixed; top: 0; left: 0;
  height: 3px; width: 0%;
  background: linear-gradient(90deg, var(--cyan), var(--green), var(--red));
  z-index: 1000;
  box-shadow: 0 0 12px var(--cyan);
  transition: width .1s linear;
}

/* ── NAV ──────────────────────────────────────── */
nav {
  position: fixed; top: 3px; left: 0; right: 0; z-index: 900;
  background: rgba(5,11,24,.97);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border2);
  display: flex; align-items: center; gap: 2px;
  padding: 0 32px; height: 54px; overflow-x: auto;
}
.nav-brand {
  font-family: 'Rajdhani', sans-serif;
  font-weight: 700; font-size: 1.1rem;
  color: var(--cyan); text-decoration: none;
  letter-spacing: .12em; text-transform: uppercase;
  margin-right: 24px; flex-shrink: 0;
  display: flex; align-items: center; gap: 8px;
}
.nav-brand::before {
  content: '⬡';
  color: var(--red);
  animation: hex-spin 4s linear infinite;
  display: inline-block;
}
@keyframes hex-spin { to { transform: rotate(360deg); } }
nav a:not(.nav-brand) {
  font-family: 'Share Tech Mono', monospace;
  font-size: .66rem; color: var(--muted);
  text-decoration: none; padding: 5px 10px;
  border-radius: 3px; white-space: nowrap;
  transition: color .2s, background .2s;
  text-transform: uppercase; letter-spacing: .06em;
}
nav a:not(.nav-brand):hover, nav a.active {
  color: var(--cyan); background: rgba(0,212,255,.08);
}

/* ── HERO ─────────────────────────────────────── */
.hero {
  position: relative; padding: 112px 56px 78px;
  overflow: hidden; z-index: 1;
  border-bottom: 1px solid var(--border2);
}
.hero-inner { max-width: 860px; position: relative; z-index: 2; }

.hero-status {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: 'Share Tech Mono', monospace;
  font-size: .7rem; letter-spacing: .14em; text-transform: uppercase;
  color: var(--green);
  border: 1px solid rgba(0,230,118,.25);
  padding: 5px 14px; border-radius: 2px; margin-bottom: 24px;
  background: rgba(0,230,118,.05);
}
.status-dot {
  width: 6px; height: 6px; background: var(--green); border-radius: 50%;
  animation: blink 1.4s steps(1) infinite;
}
@keyframes blink { 0%,100%{opacity:1} 50%{opacity:0} }

.hero h1 {
  font-family: 'Rajdhani', sans-serif; font-weight: 700;
  font-size: clamp(2.8rem, 7vw, 6rem);
  line-height: .92; color: var(--text-hi); margin-bottom: 18px;
  letter-spacing: .04em; text-transform: uppercase;
}
.hero h1 .accent { color: var(--cyan); }
.hero h1 .sub { font-size: .55em; color: var(--red); display: block; letter-spacing: .2em; }
.hero p.lead { font-size: 1.05rem; color: var(--text); max-width: 640px; line-height: 1.75; }

/* ── STATS STRIP ──────────────────────────────── */
.kpi-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }
.kpi {
  background: var(--card); border: 1px solid var(--border2);
  border-radius: 3px; padding: 12px 18px; flex: 1; min-width: 120px;
  position: relative; overflow: hidden;
  border-top: 2px solid var(--cyan);
}
.kpi.red   { border-top-color: var(--red); }
.kpi.green { border-top-color: var(--green); }
.kpi.amber { border-top-color: var(--amber); }
.kpi .kv {
  font-family: 'Rajdhani', sans-serif; font-weight: 700;
  font-size: 1.8rem; color: var(--cyan); line-height: 1; display: block;
}
.kpi.red .kv   { color: var(--red); }
.kpi.green .kv { color: var(--green); }
.kpi.amber .kv { color: var(--amber); }
.kpi .kl {
  font-family: 'Share Tech Mono', monospace;
  font-size: .62rem; color: var(--muted);
  letter-spacing: .06em; text-transform: uppercase; margin-top: 4px;
}

/* ── LAYOUT ───────────────────────────────────── */
.container { max-width: 1240px; margin: 0 auto; padding: 60px 40px; position: relative; z-index: 1; }
.two-col { display: grid; grid-template-columns: 1fr 290px; gap: 36px; }
@media (max-width: 940px) { .two-col { grid-template-columns: 1fr; } }

/* ── SECTIONS ─────────────────────────────────── */
.section { margin-bottom: 68px; opacity: 0; transform: translateY(22px); transition: opacity .6s ease, transform .6s ease; }
.section.visible { opacity: 1; transform: none; }
.sec-label {
  font-family: 'Share Tech Mono', monospace;
  font-size: .68rem; letter-spacing: .2em; text-transform: uppercase;
  color: var(--cyan3); margin-bottom: 8px;
}
.section h2 {
  font-family: 'Rajdhani', sans-serif; font-weight: 700;
  font-size: 1.9rem; color: var(--text-hi); letter-spacing: .06em; text-transform: uppercase;
  padding-bottom: 12px; border-bottom: 1px solid var(--border2); margin-bottom: 22px; position: relative;
}
.section h2::after {
  content: ''; position: absolute; bottom: -1px; left: 0;
  height: 2px; width: 60px; background: var(--cyan);
}
.section h3 {
  font-family: 'Rajdhani', sans-serif; font-weight: 600;
  font-size: 1.15rem; color: var(--cyan); letter-spacing: .06em;
  text-transform: uppercase; margin: 24px 0 10px;
}

/* ── CARDS ────────────────────────────────────── */
.card {
  background: var(--card); border: 1px solid var(--border2);
  border-radius: 4px; padding: 18px 22px; margin-bottom: 14px;
  transition: border-color .2s, transform .2s;
  position: relative; overflow: hidden;
}
.card::before { content: ''; position: absolute; left:0; top:0; width:3px; height:100%; background:var(--cyan); }
.card.red::before   { background: var(--red); }
.card.green::before { background: var(--green); }
.card.amber::before { background: var(--amber); }
.card.purple::before{ background: var(--purple); }
.card:hover { border-color: var(--cyan3); transform: translateX(3px); }
.card-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 12px; margin: 16px 0; }

/* ── CELL TYPE CARDS ──────────────────────────── */
.cell-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 12px; margin: 16px 0; }
.cell-card {
  background: var(--void3); border: 1px solid var(--border2);
  border-radius: 4px; padding: 16px; text-align: center; transition: transform .2s, border-color .2s;
}
.cell-card:hover { transform: translateY(-3px); border-color: var(--cyan2); }
.cell-icon { font-size: 2rem; display: block; margin-bottom: 8px; }
.cell-name {
  font-family: 'Rajdhani', sans-serif; font-weight: 700;
  font-size: .95rem; color: var(--text-hi); letter-spacing: .06em;
  text-transform: uppercase; margin-bottom: 4px;
}
.cell-role { font-size: .82rem; color: var(--text); line-height: 1.55; }
.cell-count { font-family:'Share Tech Mono',monospace; font-size:.68rem; color:var(--cyan); margin-top:6px; }

/* ── BOX ──────────────────────────────────────── */
.box { border-radius: 3px; padding: 13px 17px; margin: 14px 0; border: 1px solid; border-left: 3px solid; font-size: .95rem; }
.box-cyan   { background: rgba(0,212,255,.04); border-color: var(--cyan3);  border-left-color: var(--cyan);  }
.box-red    { background: rgba(255,23,68,.04);  border-color: rgba(255,23,68,.3); border-left-color: var(--red);  }
.box-green  { background: rgba(0,230,118,.04); border-color: rgba(0,230,118,.3); border-left-color: var(--green);}
.box-amber  { background: rgba(255,193,7,.04); border-color: rgba(255,193,7,.3); border-left-color: var(--amber);}

/* ── TAG ──────────────────────────────────────── */
.tag { display:inline-block; padding:2px 9px; border-radius:2px; font-family:'Share Tech Mono',monospace; font-size:.64rem; letter-spacing:.06em; text-transform:uppercase; margin-bottom:8px; }
.tag-cyan   { background:rgba(0,212,255,.08);  color:var(--cyan);   border:1px solid rgba(0,212,255,.2); }
.tag-red    { background:rgba(255,23,68,.08);  color:var(--red);    border:1px solid rgba(255,23,68,.2); }
.tag-green  { background:rgba(0,230,118,.08);  color:var(--green);  border:1px solid rgba(0,230,118,.2);}
.tag-amber  { background:rgba(255,193,7,.08);  color:var(--amber);  border:1px solid rgba(255,193,7,.2);}
.tag-purple { background:rgba(170,0,255,.08);  color:var(--purple); border:1px solid rgba(170,0,255,.2);}

/* ── TABLE ────────────────────────────────────── */
table { width:100%; border-collapse:collapse; margin:12px 0; font-size:.91rem; }
th { background:var(--void3); color:var(--cyan); font-family:'Rajdhani',sans-serif; font-weight:700; font-size:.78rem; letter-spacing:.1em; text-transform:uppercase; padding:9px 13px; text-align:left; border-bottom:1px solid var(--border2); }
td { padding:9px 13px; border-bottom:1px solid var(--border); color:var(--text); vertical-align:top; }
tr:hover td { background:rgba(0,212,255,.02); }

/* ── TIMELINE ─────────────────────────────────── */
.timeline { padding-left:28px; position:relative; }
.timeline::before { content:''; position:absolute; left:0; top:6px; bottom:6px; width:2px; background:linear-gradient(to bottom,var(--cyan),var(--red)); }
.tl-item { position:relative; margin-bottom:20px; }
.tl-item::before { content:''; position:absolute; left:-35px; top:7px; width:8px; height:8px; background:var(--cyan); border-radius:50%; border:2px solid var(--void); box-shadow:0 0 6px var(--cyan); }
.tl-yr  { font-family:'Share Tech Mono',monospace; font-size:.76rem; color:var(--red); letter-spacing:.06em; }
.tl-who { font-family:'Rajdhani',sans-serif; font-weight:700; color:var(--text-hi); font-size:1rem; letter-spacing:.04em; }
.tl-desc { font-size:.88rem; color:var(--text); }

/* ── SIDEBAR ──────────────────────────────────── */
.sidebar { position:sticky; top:68px; }
.sb-card { background:var(--card); border:1px solid var(--border2); border-radius:4px; padding:16px 18px; margin-bottom:12px; }
.sb-card h3 { font-family:'Rajdhani',sans-serif; font-weight:700; font-size:.9rem; color:var(--cyan); letter-spacing:.08em; text-transform:uppercase; margin-bottom:10px; padding-bottom:8px; border-bottom:1px solid var(--border); }
.sb-toc a { display:block; padding:4px 8px; font-family:'Share Tech Mono',monospace; font-size:.66rem; color:var(--muted); text-decoration:none; border-radius:3px; transition:color .2s,background .2s; letter-spacing:.04em; text-transform:uppercase; }
.sb-toc a:hover, .sb-toc a.active { color:var(--cyan); background:rgba(0,212,255,.07); }

ul { padding-left:22px; } li { margin:5px 0; } ul li::marker { color:var(--cyan2); }
strong { color:var(--text-hi); font-weight:700; }
code { font-family:'Share Tech Mono',monospace; background:var(--void3); color:var(--cyan); padding:2px 7px; border-radius:3px; font-size:.87em; }

#back-top { position:fixed; bottom:28px; right:28px; width:44px; height:44px; background:var(--cyan); color:var(--void); border:none; border-radius:3px; cursor:pointer; font-family:'Rajdhani',sans-serif; font-weight:700; font-size:.9rem; display:flex; align-items:center; justify-content:center; opacity:0; pointer-events:none; transition:opacity .3s,transform .3s; z-index:800; letter-spacing:.1em; }
#back-top.visible { opacity:1; pointer-events:auto; }
#back-top:hover { transform:translateY(-4px); }

footer { border-top:1px solid var(--border2); padding:24px 40px; text-align:center; color:var(--muted); font-family:'Share Tech Mono',monospace; font-size:.7rem; letter-spacing:.08em; position:relative; z-index:1; }

@media (max-width:768px) { .hero { padding:88px 22px 50px; } .container { padding:36px 18px; } nav { padding:0 14px; } }