/* ============================================================
   NeuroMap — styles.css
   Dark scientific aesthetic with bioluminescent accents
   ============================================================ */

/* ---------- Reset & Variables ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:        #040c14;
  --bg2:       #071422;
  --bg3:       #0a1e30;
  --border:    #0f2e48;
  --accent:    #00c8e8;
  --accent2:   #00e5a0;
  --accent3:   #e87d00;
  --text:      #c8dce8;
  --text-dim:  #5a7a8a;
  --text-muted:#3a5060;
  --font-head: 'Libre Baskerville', Georgia, serif;
  --font-mono: 'Space Mono', monospace;
  --radius:    6px;
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.7;
  overflow-x: hidden;
}

/* ---------- Background Canvas ---------- */
#bg-canvas {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.35;
}

/* ---------- Header ---------- */
header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(4, 12, 20, 0.88);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.logo-img {
  width: 32px;
  height: 32px;
  object-fit: contain;
  display: block;
  filter: drop-shadow(0 0 6px var(--accent));
}

.logo-text {
  font-family: var(--font-head);
  font-size: 1.1rem;
  letter-spacing: 0.08em;
  color: #fff;
}

nav { display: flex; gap: 2rem; }

.nav-link {
  color: #fff;
  text-decoration: none;
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  transition: color var(--transition);
}

.nav-link:hover { color: var(--accent); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 8rem 2rem 4rem;
  max-width: 1200px;
  margin: 0 auto;
  gap: 4rem;
}

.hero-text {
  flex: 1;
  max-width: 560px;
}

.hero-eyebrow {
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
}

.hero h1 {
  font-family: var(--font-head);
  font-size: clamp(3rem, 7vw, 5.5rem);
  line-height: 1.05;
  color: #fff;
  margin-bottom: 1.5rem;
}

.hero h1 em {
  font-style: italic;
  color: var(--accent);
}

.hero-sub {
  font-size: 0.9rem;
  color: #fff;
  margin-bottom: 2.5rem;
  max-width: 420px;
  line-height: 1.9;
}

.cta-btn {
  display: inline-block;
  padding: 0.85rem 2rem;
  border: 1px solid var(--accent);
  color: var(--accent);
  text-decoration: none;
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  transition: background var(--transition), color var(--transition), box-shadow var(--transition);
}

.cta-btn:hover {
  background: var(--accent);
  color: var(--bg);
  box-shadow: 0 0 30px rgba(0, 200, 232, 0.4);
}

.hero-decoration {
  flex: 0 0 280px;
  position: relative;
  height: 280px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.orbit {
  position: absolute;
  border-radius: 50%;
  border: 1px solid var(--border);
}

.orbit-1 { width: 200px; height: 200px; border-color: rgba(0,200,232,0.2); animation: orbit-spin 8s linear infinite; }
.orbit-2 { width: 260px; height: 260px; border-color: rgba(0,229,160,0.1); animation: orbit-spin 14s linear infinite reverse; }
.orbit-3 { width: 320px; height: 320px; border-color: rgba(0,200,232,0.06); animation: orbit-spin 22s linear infinite; }

.orbit-1::after {
  content: '';
  position: absolute;
  top: -3px; left: 50%;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent);
  transform: translateX(-50%);
}

.orbit-2::after {
  content: '';
  position: absolute;
  bottom: -3px; left: 50%;
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--accent2);
  box-shadow: 0 0 12px var(--accent2);
  transform: translateX(-50%);
}

.hero-glyph {
  font-size: 4rem;
  color: var(--accent);
  opacity: 0.15;
  position: absolute;
}

/* ---------- Sections ---------- */
section {
  position: relative;
  z-index: 1;
  max-width: 1200px;
  margin: 0 auto;
  padding: 6rem 2rem;
}

.section-label {
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: #fff;
  margin-bottom: 0.75rem;
}

.section-title {
  font-family: var(--font-head);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  color: #fff;
  margin-bottom: 3rem;
  font-weight: 700;
}

/* ---------- Explorer ---------- */
.explorer-section {
  border-top: 1px solid var(--border);
}

.explorer-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
}

/* ---------- Brain SVG ---------- */
.brain-container {
  position: relative;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  overflow: visible;
}

#brain-svg {
  width: 100%;
  height: auto;
  display: block;
}

.brain-region {
  cursor: pointer;
  transition: fill var(--transition), filter var(--transition);
}

.brain-region:hover,
.brain-region.active {
  fill: #0a2540;
  filter: url(#glow);
}

.brain-region.active {
  stroke: var(--accent) !important;
  stroke-width: 2 !important;
}

.brain-region[data-region="frontal"]:hover,
.brain-region[data-region="frontal"].active { stroke: #00c8e8 !important; }
.brain-region[data-region="parietal"]:hover,
.brain-region[data-region="parietal"].active { stroke: #00e5a0 !important; }
.brain-region[data-region="temporal"]:hover,
.brain-region[data-region="temporal"].active { stroke: #e87d00 !important; }
.brain-region[data-region="occipital"]:hover,
.brain-region[data-region="occipital"].active { stroke: #b060e8 !important; }
.brain-region[data-region="cerebellum"]:hover,
.brain-region[data-region="cerebellum"].active { stroke: #e84060 !important; }
.brain-region[data-region="brainstem"]:hover,
.brain-region[data-region="brainstem"].active { stroke: #e8c000 !important; }
.brain-region[data-region="hippocampus"]:hover,
.brain-region[data-region="hippocampus"].active { stroke: #40a0ff !important; }
.brain-region[data-region="amygdala"]:hover,
.brain-region[data-region="amygdala"].active { stroke: #ff6090 !important; }

.region-label {
  font-family: var(--font-mono);
  font-size: 10px;
  fill: var(--text-dim);
  pointer-events: none;
  transition: fill 0.2s;
  user-select: none;
}

/* Tooltip */
.brain-tooltip {
  position: absolute;
  background: rgba(0,10,20,0.92);
  border: 1px solid var(--accent);
  color: var(--accent);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  padding: 4px 10px;
  border-radius: 3px;
  pointer-events: none;
  white-space: nowrap;
  box-shadow: 0 0 14px rgba(0,200,232,0.3);
  transition: opacity 0.15s;
}

.brain-tooltip.hidden { opacity: 0; }

/* ---------- Info Panel ---------- */
.info-panel {
  position: sticky;
  top: 80px;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  min-height: 360px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.info-placeholder {
  text-align: center;
  color: #fff;
}

.placeholder-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
  opacity: 0.3;
  animation: pulse 3s ease-in-out infinite;
}

.info-content {
  width: 100%;
}

.info-content.hidden { display: none; }
.info-placeholder.hidden { display: none; }

.info-tag {
  display: inline-block;
  font-size: 0.6rem;
  letter-spacing: 0.2em;
  padding: 3px 10px;
  border: 1px solid var(--accent);
  color: var(--accent);
  margin-bottom: 1rem;
  border-radius: 2px;
}

#info-name {
  font-family: var(--font-head);
  font-size: 2rem;
  color: #fff;
  margin-bottom: 1rem;
  line-height: 1.1;
}

.info-divider {
  height: 1px;
  background: linear-gradient(90deg, var(--accent), transparent);
  margin-bottom: 1.2rem;
}

.info-desc {
  font-size: 0.85rem;
  color: #fff;
  line-height: 1.9;
  margin-bottom: 1.8rem;
}

.info-facts {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  border-top: 1px solid var(--border);
  padding-top: 1.2rem;
}

.fact-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.fact-label {
  font-size: 0.6rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: #e84060;
}

.fact-value {
  font-size: 0.8rem;
  color: var(--text);
}

/* ---------- Regions Grid ---------- */
.regions-section {
  border-top: 1px solid var(--border);
}

.regions-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}

.region-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  cursor: pointer;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
  position: relative;
  overflow: hidden;
}

.region-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 3px;
  height: 100%;
  background: var(--card-accent, var(--accent));
  transition: width var(--transition);
}

.region-card:hover {
  border-color: var(--card-accent, var(--accent));
  transform: translateY(-3px);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.4);
}

.region-card:hover::before { width: 5px; }

.card-tag {
  font-size: 0.6rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--card-accent, var(--accent));
  margin-bottom: 0.6rem;
}

.card-name {
  font-family: var(--font-head);
  font-size: 1.2rem;
  color: #fff;
  margin-bottom: 0.8rem;
}

.card-desc {
  font-size: 0.78rem;
  color: #c8dce8;
  line-height: 1.8;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ---------- About / Stats ---------- */
.about-section {
  border-top: 1px solid var(--border);
}

.about-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.about-text h2 {
  font-family: var(--font-head);
  font-size: 2rem;
  color: #fff;
  margin-bottom: 1rem;
}

.about-text p {
  font-size: 0.85rem;
  color: #ff6090;
  line-height: 2;
}

.stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.stat-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  transition: border-color var(--transition);
}

.stat-card:hover { border-color: var(--accent); }

.stat-num {
  font-family: var(--font-head);
  font-size: 2.4rem;
  color: #fff;
  line-height: 1;
}

.stat-num em {
  font-style: normal;
  color: var(--accent);
  font-size: 1.4rem;
}

.stat-label {
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #c8dce8;
}

/* ---------- Footer ---------- */
footer {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 2rem;
  border-top: 1px solid var(--border);
  font-size: 0.7rem;
  color: #fff;
  letter-spacing: 0.1em;
}

/* ---------- Animations ---------- */
@keyframes orbit-spin {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}

@keyframes spin-slow {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}

@keyframes pulse {
  0%, 100% { opacity: 0.3; }
  50%       { opacity: 0.6; }
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

.fade-in { animation: fadeInUp 0.5s ease forwards; }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .explorer-layout { grid-template-columns: 1fr; }
  .info-panel { position: static; }
  .about-inner { grid-template-columns: 1fr; }
  .hero { flex-direction: column; text-align: center; }
  .hero-text { max-width: 100%; }
  .hero-sub { max-width: 100%; }
  .hero-decoration { display: none; }
}

@media (max-width: 600px) {
  .regions-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr; }
}