@import url('https://fonts.googleapis.com/css2?family=Josefin+Sans:ital,wght@0,100;0,300;0,600;0,700;1,300&family=EB+Garamond:ital,wght@0,400;0,500;1,400;1,500&family=Fira+Code:wght@300;400&display=swap');

:root {
  --bg:       #03050e;
  --bg2:      #070d1a;
  --bg3:      #0a1220;
  --panel:    #0c1525;
  --cyan:     #06b6d4;
  --cyan-dim: #0891b2;
  --lime:     #a3e635;
  --lime-dim: #65a30d;
  --violet:   #8b5cf6;
  --text:     #f0f9ff;
  --text-dim: #94a3b8;
  --border:   rgba(6,182,212,.18);
  --glow-c:   rgba(6,182,212,.35);
  --glow-l:   rgba(163,230,53,.25);
}

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

body {
  font-family: 'EB Garamond', Georgia, serif;
  background: var(--bg);
  color: var(--text);
  overflow-x: hidden;
  line-height: 1.75;
}

::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--cyan); border-radius: 4px; }

/* ── NAVBAR ── */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: .9rem 2.5rem;
  background: rgba(3,5,14,.88);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}
.navbar-brand {
  font-family: 'Fira Code', monospace;
  font-size: .72rem; color: var(--cyan); letter-spacing: .15em; text-transform: uppercase;
}
.nav-links { display: flex; gap: 2rem; list-style: none; }
.nav-links a {
  font-family: 'Josefin Sans', sans-serif;
  font-size: .72rem; font-weight: 300; color: var(--text-dim);
  text-decoration: none; letter-spacing: .12em; text-transform: uppercase; transition: color .2s;
}
.nav-links a:hover, .nav-links a.active { color: var(--cyan); }

/* ── HERO ── */
.hero {
  min-height: 100vh;
  display: grid; grid-template-columns: 1fr 1fr;
  align-items: center; padding: 8rem 5% 4rem;
  position: relative; overflow: hidden;
}
.hero-particles { position: absolute; inset: 0; pointer-events: none; }
#particleCanvas { position: absolute; inset: 0; width: 100%; height: 100%; }

.hero-content { position: relative; z-index: 2; }
.hero-tag {
  font-family: 'Fira Code', monospace;
  font-size: .68rem; color: var(--lime); letter-spacing: .2em;
  text-transform: uppercase; margin-bottom: 1.5rem;
  display: flex; align-items: center; gap: .75rem;
}
.hero-tag::before { content: ''; display: block; width: 2.5rem; height: 1px; background: var(--lime); }

.hero-title {
  font-family: 'Josefin Sans', sans-serif;
  font-size: clamp(4rem, 7vw, 8rem);
  font-weight: 700; line-height: .9;
  letter-spacing: -.01em; color: var(--text);
  margin-bottom: 1.5rem;
}
.hero-title .glow-cyan {
  color: var(--cyan);
  text-shadow: 0 0 30px var(--glow-c), 0 0 80px rgba(6,182,212,.15);
}
.hero-sub {
  font-family: 'EB Garamond', serif;
  font-size: 1.1rem; font-style: italic; color: var(--text-dim);
  max-width: 460px; margin-bottom: 2.5rem;
}

.hero-chips { display: flex; gap: .75rem; flex-wrap: wrap; margin-bottom: 2.5rem; }
.chip {
  font-family: 'Fira Code', monospace; font-size: .65rem;
  padding: .35rem .9rem; border-radius: 20px; letter-spacing: .06em;
  border: 1px solid; text-transform: uppercase;
}
.chip-cyan { border-color: var(--cyan); color: var(--cyan); background: rgba(6,182,212,.06); }
.chip-lime { border-color: var(--lime); color: var(--lime); background: rgba(163,230,53,.06); }
.chip-violet { border-color: var(--violet); color: var(--violet); background: rgba(139,92,246,.06); }

.hero-figures {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: .85rem; max-width: 400px;
}
.hfig {
  background: var(--panel); border: 1px solid var(--border); border-radius: 8px;
  padding: .85rem; position: relative; overflow: hidden;
}
.hfig::before { content: ''; position: absolute; left: 0; top: 0; bottom: 0; width: 2px; background: var(--cyan); }
.hfig-num { font-family: 'Josefin Sans', sans-serif; font-size: 1.6rem; font-weight: 700; color: var(--cyan); line-height: 1; }
.hfig-lbl { font-family: 'Fira Code', monospace; font-size: .58rem; color: var(--text-dim); text-transform: uppercase; letter-spacing: .06em; margin-top: .2rem; }

.hero-neuron-wrap { position: relative; z-index: 2; display: flex; justify-content: center; align-items: center; }
#neuronCanvas { width: 100%; max-width: 520px; filter: drop-shadow(0 0 30px rgba(6,182,212,.25)); }

/* ── SECTION ── */
.section {
  padding: 5rem 5%; max-width: 1100px; margin: 0 auto;
  opacity: 0; transform: translateY(28px);
  transition: opacity .65s ease, transform .65s ease;
}
.section.visible { opacity: 1; transform: none; }

.section-tag {
  font-family: 'Fira Code', monospace; font-size: .65rem;
  color: var(--lime); letter-spacing: .18em; text-transform: uppercase;
  margin-bottom: .5rem;
}
.section-title {
  font-family: 'Josefin Sans', sans-serif;
  font-size: clamp(1.8rem, 3vw, 2.5rem); font-weight: 700;
  letter-spacing: .04em; text-transform: uppercase;
  color: var(--text); margin-bottom: 2.5rem;
  padding-bottom: 1rem; border-bottom: 1px solid var(--border);
}
.section-title .hl { color: var(--cyan); }

/* ── ANATOMIE CARDS ── */
.parts-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 1.2rem; }
.part-card {
  background: var(--panel); border: 1px solid var(--border); border-radius: 12px;
  padding: 1.5rem; position: relative; overflow: hidden;
  transition: border-color .3s, transform .3s;
}
.part-card:hover { border-color: var(--cyan); transform: translateY(-5px); box-shadow: 0 20px 40px rgba(6,182,212,.12); }
.part-card::after { content: ''; position: absolute; bottom: 0; left: 0; right: 0; height: 2px; background: linear-gradient(90deg, var(--cyan), var(--lime)); transform: scaleX(0); transform-origin: left; transition: transform .4s; }
.part-card:hover::after { transform: scaleX(1); }
.part-icon { font-size: 2rem; margin-bottom: .75rem; }
.part-label { font-family: 'Fira Code', monospace; font-size: .65rem; color: var(--lime); letter-spacing: .12em; text-transform: uppercase; margin-bottom: .4rem; }
.part-name { font-family: 'Josefin Sans', sans-serif; font-size: 1.15rem; font-weight: 600; color: var(--text); margin-bottom: .6rem; }
.part-desc { font-size: .88rem; color: var(--text-dim); line-height: 1.7; }

/* ── ACTION POTENTIAL == */
.ap-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 2.5rem; align-items: start; }
.ap-graph-wrap { background: var(--panel); border: 1px solid var(--border); border-radius: 16px; padding: 1.5rem; }
.ap-graph-title { font-family: 'Fira Code', monospace; font-size: .7rem; color: var(--cyan); letter-spacing: .12em; text-transform: uppercase; margin-bottom: 1rem; }
#apCanvas { width: 100%; height: 220px; border-radius: 8px; }
.ap-controls { display: flex; gap: .75rem; margin-top: 1rem; }
.ap-btn {
  font-family: 'Fira Code', monospace; font-size: .65rem; letter-spacing: .08em;
  text-transform: uppercase; padding: .55rem 1.25rem; border-radius: 6px; cursor: pointer; transition: all .2s;
}
.ap-btn-start { background: var(--cyan); border: none; color: var(--bg); font-weight: 600; }
.ap-btn-start:hover { background: var(--cyan-dim); }
.ap-btn-reset { background: transparent; border: 1px solid var(--border); color: var(--text-dim); }
.ap-btn-reset:hover { border-color: var(--text-dim); color: var(--text); }

.ap-phases { display: flex; flex-direction: column; gap: 1rem; }
.ap-phase {
  padding: 1rem 1.25rem; border: 1px solid var(--border);
  background: var(--panel); border-radius: 8px; position: relative; overflow: hidden;
}
.ap-phase::before { content: ''; position: absolute; left: 0; top: 0; bottom: 0; width: 3px; }
.ap-phase.rest::before   { background: var(--violet); }
.ap-phase.depol::before  { background: var(--cyan); }
.ap-phase.repol::before  { background: var(--lime); }
.ap-phase.hyper::before  { background: #f59e0b; }
.ap-phase.refract::before{ background: #ef4444; }
.ap-phase-label { font-family: 'Fira Code', monospace; font-size: .62rem; letter-spacing: .1em; text-transform: uppercase; color: var(--text-dim); margin-bottom: .35rem; }
.ap-phase-title { font-family: 'Josefin Sans', sans-serif; font-size: .95rem; font-weight: 600; color: var(--text); margin-bottom: .3rem; }
.ap-phase-body { font-size: .82rem; color: var(--text-dim); }
.ap-mv { font-family: 'Fira Code', monospace; font-size: .75rem; float: right; }
.ap-mv.rest   { color: var(--violet); }
.ap-mv.depol  { color: var(--cyan); }
.ap-mv.repol  { color: var(--lime); }
.ap-mv.hyper  { color: #f59e0b; }

/* ── SYNAPSE == */
.synapse-layout { display: grid; grid-template-columns: 1.2fr 1fr; gap: 2.5rem; align-items: start; }
.synapse-svg-wrap { background: var(--panel); border: 1px solid var(--border); border-radius: 16px; padding: 2rem; }
.neurotrans-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.nt-card {
  background: var(--bg3); border: 1px solid var(--border); border-radius: 10px; padding: 1.25rem;
  transition: border-color .3s;
}
.nt-card:hover { border-color: var(--cyan); }
.nt-name { font-family: 'Josefin Sans', sans-serif; font-size: .95rem; font-weight: 600; color: var(--cyan); margin-bottom: .4rem; }
.nt-type { font-family: 'Fira Code', monospace; font-size: .6rem; color: var(--text-dim); text-transform: uppercase; letter-spacing: .08em; margin-bottom: .5rem; }
.nt-desc { font-size: .82rem; color: var(--text-dim); line-height: 1.65; }

/* ── CLASSIFICATION ── */
.classif-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 1.2rem; }
.classif-card {
  background: var(--panel); border: 1px solid var(--border); border-radius: 10px; padding: 1.4rem;
}
.classif-criterion { font-family: 'Fira Code', monospace; font-size: .62rem; color: var(--lime); letter-spacing: .1em; text-transform: uppercase; margin-bottom: .6rem; }
.classif-items { display: flex; flex-direction: column; gap: .4rem; }
.classif-item { display: flex; align-items: baseline; gap: .5rem; font-size: .85rem; color: var(--text-dim); }
.classif-dot { width: 5px; height: 5px; border-radius: 50%; background: var(--cyan); flex-shrink: 0; margin-top: .4rem; }

/* ── PATHOLOGIES ── */
.path-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 1.5rem; }
.path-card {
  background: var(--panel); border: 1px solid var(--border); border-radius: 12px; padding: 1.5rem;
  position: relative; overflow: hidden;
}
.path-card::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px; }
.path-card.neuro-deg::before { background: linear-gradient(90deg, var(--cyan), var(--violet)); }
.path-card.demyelin::before  { background: linear-gradient(90deg, var(--lime), var(--cyan)); }
.path-card.channelopathy::before { background: linear-gradient(90deg, #f59e0b, var(--lime)); }
.path-card.tumor::before     { background: linear-gradient(90deg, #ef4444, #f59e0b); }
.path-type { font-family: 'Fira Code', monospace; font-size: .6rem; color: var(--text-dim); letter-spacing: .1em; text-transform: uppercase; margin-bottom: .6rem; }
.path-name { font-family: 'Josefin Sans', sans-serif; font-size: 1.05rem; font-weight: 600; color: var(--text); margin-bottom: .6rem; }
.path-body { font-size: .85rem; color: var(--text-dim); line-height: 1.7; margin-bottom: .85rem; }
.path-tags { display: flex; flex-wrap: wrap; gap: .4rem; }
.path-tag { font-family: 'Fira Code', monospace; font-size: .58rem; padding: .2rem .55rem; border-radius: 4px; border: 1px solid var(--border); color: var(--text-dim); }

/* ── GLIA == */
.glia-table { width: 100%; border-collapse: collapse; }
.glia-table th { font-family: 'Fira Code', monospace; font-size: .65rem; letter-spacing: .1em; text-transform: uppercase; color: var(--text-dim); padding: .75rem 1rem; border-bottom: 1px solid var(--border); text-align: left; }
.glia-table td { padding: .9rem 1rem; font-size: .88rem; color: var(--text-dim); border-bottom: 1px solid rgba(6,182,212,.07); vertical-align: top; }
.glia-table tr:hover td { background: rgba(6,182,212,.04); }
.glia-table td:first-child { font-family: 'Josefin Sans', sans-serif; font-weight: 600; color: var(--text); font-size: .95rem; }

/* ── PLASTICITE ── */
.plasticity-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 1.2rem; }
.plast-card { background: var(--panel); border: 1px solid var(--border); border-radius: 12px; padding: 1.5rem; }
.plast-icon { font-size: 2rem; margin-bottom: .75rem; }
.plast-name { font-family: 'Josefin Sans', sans-serif; font-size: 1rem; font-weight: 600; color: var(--cyan); margin-bottom: .5rem; }
.plast-body { font-size: .85rem; color: var(--text-dim); line-height: 1.7; }

/* ── FOOTER ── */
.footer { border-top: 1px solid var(--border); padding: 2rem 5%; margin-top: 4rem; display: flex; justify-content: space-between; align-items: center; }
.footer-brand { font-family: 'Fira Code', monospace; font-size: .7rem; color: var(--text-dim); }
.footer-note { font-family: 'Fira Code', monospace; font-size: .62rem; color: rgba(6,182,212,.3); }

@media (max-width: 768px) {
  .hero { grid-template-columns: 1fr; padding-top: 7rem; }
  .hero-neuron-wrap { display: none; }
  .ap-layout { grid-template-columns: 1fr; }
  .synapse-layout { grid-template-columns: 1fr; }
  .footer { flex-direction: column; gap: 1rem; text-align: center; }
}