@import url('https://fonts.googleapis.com/css2?family=Syne:wght@400;600;700;800&family=IBM+Plex+Serif:ital,wght@0,300;0,400;1,400&display=swap');

:root {
  --void: #06080f;
  --deep: #0c1220;
  --surface: #111827;
  --card: #161e2e;
  --border: #1e2d47;
  --electric: #38bdf8;
  --electric-dim: #0ea5e9;
  --glow: rgba(56,189,248,0.15);
  --pulse: #a78bfa;
  --pulse-glow: rgba(167,139,250,0.15);
  --synapse: #34d399;
  --synapse-glow: rgba(52,211,153,0.15);
  --text: #e2e8f0;
  --muted: #64748b;
  --highlight: #f0f9ff;
  --danger: #fb7185;
}

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

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

/* ── HERO ── */
.hero {
  position: relative;
  min-height: 520px;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--deep);
}
.hero-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}
.hero-gradient {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 50% 70% at 75% 50%, rgba(56,189,248,0.08) 0%, transparent 60%),
    radial-gradient(ellipse 30% 50% at 20% 80%, rgba(167,139,250,0.06) 0%, transparent 60%),
    radial-gradient(ellipse 40% 40% at 80% 10%, rgba(52,211,153,0.05) 0%, transparent 60%);
}
.hero-inner {
  position: relative;
  z-index: 2;
  max-width: 1060px;
  margin: auto;
  padding: 80px 50px;
}
.hero-kicker {
  font-family: 'Syne', sans-serif;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--electric);
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.hero-kicker::before {
  content: '';
  width: 32px;
  height: 1px;
  background: var(--electric);
}
h1 {
  font-family: 'Syne', sans-serif;
  font-size: clamp(3rem, 7vw, 5.5rem);
  font-weight: 800;
  line-height: 0.95;
  margin-bottom: 28px;
  letter-spacing: -0.03em;
}
h1 .word-1 { color: var(--highlight); }
h1 .word-2 {
  display: block;
  -webkit-text-stroke: 1px var(--electric);
  color: transparent;
  font-style: italic;
}
.hero-lead {
  max-width: 560px;
  font-size: 1.1rem;
  font-weight: 300;
  color: rgba(226,232,240,0.75);
  line-height: 1.7;
  margin-bottom: 36px;
  font-style: italic;
}
.hero-stats {
  display: flex;
  gap: 32px;
  flex-wrap: wrap;
}
.h-stat {
  border-left: 2px solid var(--electric);
  padding-left: 14px;
}
.h-stat .num {
  font-family: 'Syne', sans-serif;
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--electric);
  line-height: 1;
}
.h-stat .lbl {
  font-size: 0.78rem;
  color: var(--muted);
  margin-top: 2px;
}

/* ── NAV ── */
.brain-nav {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(8px);
}
.brain-nav-inner {
  max-width: 1060px;
  margin: auto;
  padding: 0 50px;
  display: flex;
  overflow-x: auto;
  scrollbar-width: none;
}
.brain-nav-inner::-webkit-scrollbar { display: none; }
.b-nav-link {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 14px 18px;
  font-family: 'Syne', sans-serif;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--muted);
  text-decoration: none;
  white-space: nowrap;
  border-bottom: 2px solid transparent;
  transition: all 0.2s;
}
.b-nav-link:hover { color: var(--electric); }
.b-nav-link.active { color: var(--electric); border-bottom-color: var(--electric); }

/* ── LAYOUT ── */
.page-wrap {
  max-width: 1060px;
  margin: auto;
  padding: 64px 50px;
  display: grid;
  grid-template-columns: 1fr 290px;
  gap: 60px;
}
main { min-width: 0; }

/* ── SECTIONS ── */
.section { margin-bottom: 72px; }
.section-tag {
  font-family: 'Syne', sans-serif;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--electric);
  margin-bottom: 12px;
}
.section h2 {
  font-family: 'Syne', sans-serif;
  font-size: 1.85rem;
  font-weight: 700;
  color: var(--highlight);
  margin-bottom: 20px;
  line-height: 1.15;
}
.section p {
  font-size: 0.97rem;
  color: rgba(226,232,240,0.82);
  margin-bottom: 16px;
  line-height: 1.8;
}

/* ── LOBE CARDS ── */
.lobe-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin: 24px 0;
}
.lobe-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px;
  position: relative;
  overflow: hidden;
  transition: border-color 0.3s, box-shadow 0.3s;
}
.lobe-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 3px;
  height: 100%;
  background: var(--lobe-color, var(--electric));
}
.lobe-card:hover {
  border-color: var(--lobe-color, var(--electric));
  box-shadow: 0 0 24px var(--lobe-glow, var(--glow));
}
.lobe-card .lobe-name {
  font-family: 'Syne', sans-serif;
  font-size: 1rem;
  font-weight: 700;
  color: var(--lobe-color, var(--electric));
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.lobe-card .lobe-functions {
  font-size: 0.84rem;
  color: rgba(226,232,240,0.7);
  line-height: 1.6;
}
.lobe-card .lobe-area {
  display: inline-block;
  margin-top: 10px;
  font-size: 0.72rem;
  font-family: 'Syne', sans-serif;
  font-weight: 600;
  color: var(--muted);
  border: 1px solid var(--border);
  padding: 2px 10px;
  border-radius: 3px;
}

/* ── NEURON STRUCTURE ── */
.neuron-parts {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  margin: 24px 0;
}
.neuron-header {
  padding: 16px 22px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  font-family: 'Syne', sans-serif;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}
.neuron-row {
  display: grid;
  grid-template-columns: 150px 1fr;
  border-bottom: 1px solid var(--border);
}
.neuron-row:last-child { border-bottom: none; }
.neuron-part {
  padding: 14px 18px;
  background: rgba(56,189,248,0.04);
  border-right: 1px solid var(--border);
  font-family: 'Syne', sans-serif;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--electric);
  display: flex;
  align-items: center;
}
.neuron-desc {
  padding: 14px 18px;
  font-size: 0.86rem;
  color: rgba(226,232,240,0.75);
  display: flex;
  align-items: center;
}

/* ── NEURO PATHOLOGIES ── */
.patho-list { margin: 20px 0; }
.patho-item {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 22px;
  margin-bottom: 14px;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 18px;
  align-items: start;
  transition: border-color 0.25s;
}
.patho-item:hover { border-color: var(--pulse); }
.patho-icon {
  width: 48px;
  height: 48px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  flex-shrink: 0;
}
.pi-blue { background: var(--glow); }
.pi-purple { background: var(--pulse-glow); }
.pi-green { background: var(--synapse-glow); }
.pi-red { background: rgba(251,113,133,0.12); }
.patho-content strong {
  display: block;
  font-family: 'Syne', sans-serif;
  font-size: 1rem;
  font-weight: 700;
  color: var(--highlight);
  margin-bottom: 4px;
}
.patho-content p {
  font-size: 0.87rem;
  color: rgba(226,232,240,0.7);
  margin: 0;
  line-height: 1.65;
}
.patho-prevalence {
  display: inline-block;
  margin-top: 8px;
  font-family: 'Syne', sans-serif;
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--muted);
  border: 1px solid var(--border);
  padding: 2px 10px;
  border-radius: 3px;
}

/* ── BRAIN WAVES ── */
.waves-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 10px;
  margin: 20px 0;
}
.wave-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px 12px;
  text-align: center;
  transition: all 0.2s;
}
.wave-card:hover {
  border-color: var(--wave-color);
  box-shadow: 0 0 16px var(--wave-glow);
}
.wave-card .wc-name {
  font-family: 'Syne', sans-serif;
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--wave-color);
  margin-bottom: 4px;
}
.wave-card .wc-freq {
  font-size: 0.72rem;
  color: var(--muted);
  margin-bottom: 8px;
}
.wave-card .wc-state {
  font-size: 0.75rem;
  color: rgba(226,232,240,0.7);
  line-height: 1.4;
}

/* ── SIDEBAR ── */
.sidebar { position: sticky; top: 64px; }
.widget {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 22px;
  margin-bottom: 16px;
}
.widget-title {
  font-family: 'Syne', sans-serif;
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--electric);
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
}
.stat-item {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.84rem;
}
.stat-item:last-child { border-bottom: none; }
.stat-item .s-label { color: var(--muted); }
.stat-item .s-value { font-family: 'Syne', sans-serif; font-weight: 700; color: var(--electric); }

/* ── MYTH BUSTERS ── */
.myth-item {
  margin-bottom: 14px;
  padding: 14px;
  border-radius: 8px;
  border: 1px solid var(--border);
}
.myth-item .myth-label {
  font-family: 'Syne', sans-serif;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  padding: 2px 8px;
  border-radius: 2px;
  margin-bottom: 6px;
  display: inline-block;
}
.myth-false .myth-label { background: rgba(251,113,133,0.15); color: var(--danger); }
.myth-true .myth-label  { background: var(--synapse-glow); color: var(--synapse); }
.myth-item .myth-text { font-size: 0.83rem; color: rgba(226,232,240,0.8); line-height: 1.55; }

/* ── FOOTER ── */
footer {
  background: var(--surface);
  border-top: 1px solid var(--border);
  text-align: center;
  padding: 28px;
  font-size: 0.8rem;
  color: var(--muted);
  font-family: 'Syne', sans-serif;
}
footer strong { color: rgba(226,232,240,0.7); }

/* ── RESPONSIVE ── */
@media (max-width: 800px) {
  .page-wrap { grid-template-columns: 1fr; padding: 30px 20px; }
  .sidebar { position: static; }
  .lobe-grid { grid-template-columns: 1fr; }
  .waves-grid { grid-template-columns: repeat(3, 1fr); }
  .hero-inner { padding: 50px 24px; }
  .brain-nav-inner { padding: 0 20px; }
}
@media (max-width: 500px) {
  .waves-grid { grid-template-columns: 1fr 1fr; }
  .neuron-row { grid-template-columns: 110px 1fr; }
}