:root {
  --burgundy-950: #26040d;
  --burgundy-900: #3a0714;
  --burgundy-800: #5d1024;
  --burgundy-650: #8f1835;
  --gold-500: #f4c542;
  --gold-300: #ffe38a;
  --gold-100: #fff4c9;
  --ink: #211014;
  --paper: #fffaf0;
  --paper-strong: #fffdf8;
  --cool: #e6f2f0;
  --muted: #74565f;
  --line: rgba(93, 16, 36, 0.18);
  --shadow: 0 26px 80px rgba(38, 4, 13, 0.24);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(90deg, rgba(93, 16, 36, 0.05) 1px, transparent 1px),
    linear-gradient(rgba(93, 16, 36, 0.05) 1px, transparent 1px),
    radial-gradient(circle at 12% 7%, rgba(244, 197, 66, 0.32), transparent 24rem),
    radial-gradient(circle at 90% 4%, rgba(93, 16, 36, 0.14), transparent 28rem),
    var(--paper);
  background-size: 48px 48px, 48px 48px, auto, auto, auto;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.5;
}

button,
a {
  font: inherit;
}

button {
  cursor: pointer;
}

@keyframes particleDrift {
  from { background-position: 0 0, 0 0, 0 0, 28px 36px, 16px 22px; }
  to { background-position: 0 0, 0 0, 74px 74px, 146px 154px, 62px 68px; }
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 4.75rem;
  padding: 0.75rem clamp(1rem, 4vw, 3rem);
  color: white;
  background: rgba(38, 4, 13, 0.9);
  border-bottom: 1px solid rgba(244, 197, 66, 0.32);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.85rem;
  color: white;
  text-decoration: none;
}

.brand-symbol {
  position: relative;
  display: block;
  width: 3rem;
  height: 3rem;
  border: 1px solid rgba(244, 197, 66, 0.45);
  border-radius: 0.6rem;
  background:
    radial-gradient(circle at 30% 32%, var(--gold-500) 0 0.46rem, transparent 0.48rem),
    radial-gradient(circle at 70% 30%, var(--gold-300) 0 0.22rem, transparent 0.24rem),
    radial-gradient(circle at 72% 72%, var(--gold-500) 0 0.33rem, transparent 0.35rem),
    linear-gradient(135deg, var(--burgundy-650), var(--burgundy-950));
  box-shadow: 0 16px 30px rgba(0, 0, 0, 0.24);
}

.brand-symbol span {
  position: absolute;
  height: 1px;
  background: rgba(255, 227, 138, 0.75);
  transform-origin: left center;
}

.brand-symbol span:nth-child(1) { width: 1.2rem; left: 0.95rem; top: 1rem; rotate: 16deg; }
.brand-symbol span:nth-child(2) { width: 1rem; left: 1.8rem; top: 1.05rem; rotate: 92deg; }
.brand-symbol span:nth-child(3) { width: 1.05rem; left: 1.8rem; top: 2.1rem; rotate: -148deg; }
.brand-symbol span:nth-child(4) { width: 1.25rem; left: 0.92rem; top: 1rem; rotate: 75deg; }

.brand strong,
.brand small {
  display: block;
}

.brand strong {
  font-size: 1rem;
  letter-spacing: 0.02em;
}

.brand small {
  color: rgba(255, 244, 201, 0.74);
  font-size: 0.76rem;
}

.nav {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.nav a {
  color: rgba(255, 250, 240, 0.86);
  padding: 0.58rem 0.82rem;
  border-radius: 999px;
  text-decoration: none;
}

.nav a:hover {
  color: var(--burgundy-950);
  background: var(--gold-500);
}

main {
  overflow: hidden;
}

.hero {
  position: relative;
  min-height: calc(100svh - 4.75rem);
  isolation: isolate;
  color: white;
  background:
    linear-gradient(125deg, rgba(38, 4, 13, 0.98), rgba(93, 16, 36, 0.9) 48%, rgba(244, 197, 66, 0.18)),
    var(--burgundy-950);
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 12% 20%, rgba(244, 197, 66, 0.15), transparent 22rem),
    radial-gradient(circle at 82% 34%, rgba(244, 197, 66, 0.12), transparent 20rem),
    radial-gradient(circle, rgba(255, 244, 201, 0.42) 0 1px, transparent 1.7px) 0 0 / 74px 74px,
    radial-gradient(circle, rgba(244, 197, 66, 0.32) 0 1.25px, transparent 1.9px) 28px 36px / 118px 118px,
    radial-gradient(circle, rgba(255, 250, 240, 0.26) 0 0.8px, transparent 1.5px) 16px 22px / 46px 46px;
  pointer-events: none;
  z-index: 0;
  opacity: 0.72;
  animation: particleDrift 18s linear infinite;
}

.hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 9rem;
  background: linear-gradient(transparent, var(--paper));
  pointer-events: none;
  z-index: 0;
}

.hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 0.82fr) minmax(28rem, 0.68fr);
  gap: clamp(1.5rem, 5vw, 4rem);
  align-items: start;
  width: min(1220px, calc(100% - 2rem));
  min-height: calc(100svh - 4.75rem);
  margin: 0 auto;
  padding: clamp(2.8rem, 6vw, 4.5rem) 0 clamp(4rem, 7vw, 6rem);
}

.journal-tag,
.micro-label {
  margin: 0 0 0.65rem;
  color: var(--gold-500);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.hero-copy h1 {
  max-width: 12.6ch;
  margin: 0;
  color: white;
  font-size: clamp(3rem, 7.2vw, 6.2rem);
  line-height: 0.9;
  letter-spacing: 0;
  overflow-wrap: anywhere;
  text-shadow: 0 20px 70px rgba(0, 0, 0, 0.32);
}

.hero-copy p:not(.journal-tag) {
  max-width: 45rem;
  color: rgba(255, 250, 240, 0.82);
  font-size: 1.08rem;
}

.hero-copy .article-authors {
  max-width: 48rem;
  color: rgba(255, 244, 201, 0.78);
  font-size: 0.95rem;
  font-weight: 700;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.button,
.primary-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3rem;
  padding: 0.8rem 1.1rem;
  border-radius: 0.55rem;
  font-weight: 850;
  text-decoration: none;
}

.button.primary,
.primary-action {
  color: var(--burgundy-950);
  border: 0;
  background: linear-gradient(135deg, var(--gold-500), var(--gold-300));
  box-shadow: 0 18px 44px rgba(244, 197, 66, 0.18);
}

.button.secondary {
  color: white;
  border: 1px solid rgba(255, 227, 138, 0.38);
  background: rgba(255, 255, 255, 0.08);
}

.hero-side {
  display: grid;
  gap: 1rem;
  align-self: start;
  padding-top: clamp(2.4rem, 9vw, 8.2rem);
}

.band-visual {
  position: relative;
  overflow: hidden;
  min-height: 36.4rem;
  border: 1px solid rgba(255, 227, 138, 0.28);
  border-radius: 0.9rem;
  background:
    radial-gradient(circle at 25% 18%, rgba(244, 197, 66, 0.2), transparent 14rem),
    linear-gradient(135deg, rgba(255, 250, 240, 0.09), rgba(255, 250, 240, 0.03));
  box-shadow: 0 26px 80px rgba(0, 0, 0, 0.22);
  backdrop-filter: blur(18px);
}

.band-visual::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(255, 227, 138, 0.08) 1px, transparent 1px),
    linear-gradient(rgba(255, 227, 138, 0.08) 1px, transparent 1px);
  background-size: 46px 46px;
  pointer-events: none;
}

.band-visual-top {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.8rem;
  padding: 1rem 1rem 0;
}

.band-visual-top strong {
  color: rgba(255, 250, 240, 0.9);
}

#band-animation {
  position: relative;
  z-index: 1;
  display: block;
  width: 100%;
  min-height: 29rem;
}

.band-grid line {
  stroke: rgba(255, 227, 138, 0.16);
  stroke-width: 1;
}

.band-bar-normal {
  fill: rgba(255, 250, 240, 0.28);
}

.band-bar-freezing {
  fill: rgba(244, 197, 66, 0.78);
}

.band-wave {
  fill: none;
  stroke-linecap: round;
  stroke-width: 3;
}

.band-wave.normal {
  stroke: rgba(255, 250, 240, 0.38);
}

.band-wave.freezing {
  stroke: rgba(244, 197, 66, 0.92);
  filter: drop-shadow(0 0 9px rgba(244, 197, 66, 0.42));
}

.eeg-freeze-window {
  fill: rgba(244, 197, 66, 0.08);
  stroke: rgba(244, 197, 66, 0.28);
  stroke-width: 1;
}

.eeg-baseline {
  stroke: rgba(255, 250, 240, 0.13);
  stroke-width: 1;
}

.eeg-trace {
  fill: none;
  stroke: rgba(255, 250, 240, 0.72);
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.55;
}

.eeg-trace.freezing {
  stroke: rgba(244, 197, 66, 0.92);
  stroke-width: 1.85;
  filter: drop-shadow(0 0 5px rgba(244, 197, 66, 0.28));
}

.eeg-channel-label,
.eeg-time-label,
.eeg-marker-label {
  fill: rgba(255, 250, 240, 0.86);
  font-size: 13px;
  font-weight: 800;
}

.eeg-time-label,
.eeg-marker-label {
  fill: rgba(255, 244, 201, 0.72);
  font-size: 12px;
}

.band-label,
.band-value {
  fill: rgba(255, 250, 240, 0.9);
  font-size: 15px;
  font-weight: 800;
}

.band-pvalue {
  fill: rgba(255, 244, 201, 0.82);
  font-size: 13px;
  font-weight: 700;
}

.band-pulse {
  filter: drop-shadow(0 0 8px rgba(244, 197, 66, 0.72));
}

.band-readout {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 0.3rem;
  margin: 0 1rem 1rem;
  padding: 0.9rem 1rem;
  color: var(--burgundy-950);
  border-radius: 0.65rem;
  background: linear-gradient(135deg, var(--gold-500), var(--gold-100));
}

.band-readout span,
.band-readout strong {
  display: block;
}

.band-readout span {
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.paper-station,
.pathway-section,
.atlas-section,
.figure-section,
.simulator-section {
  width: min(1220px, calc(100% - 2rem));
  margin: 0 auto;
  padding: clamp(3.5rem, 8vw, 6.5rem) 0;
}

.section-title {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(18rem, 0.55fr);
  gap: 1.4rem;
  align-items: end;
  margin-bottom: 1.4rem;
}

.section-title.compact {
  display: block;
  max-width: 58rem;
}

.section-title h2 {
  margin: 0;
  color: var(--burgundy-950);
  font-size: clamp(2.1rem, 5vw, 4.7rem);
  line-height: 0.95;
}

.section-title p:last-child {
  margin: 0;
  color: var(--muted);
}

.paper-grid,
.diagnostic-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.paper-panel,
.mechanism-stage,
.pathway-track,
.atlas-card,
.atlas-toolbar,
.case-list,
.case-workbench,
.figure-tabs,
.figure-viewer {
  border: 1px solid var(--line);
  border-radius: 0.75rem;
  background: rgba(255, 253, 248, 0.88);
  box-shadow: 0 18px 56px rgba(38, 4, 13, 0.1);
  backdrop-filter: blur(16px);
}

.paper-panel {
  min-height: 20rem;
  padding: 1.2rem;
}

.paper-panel.accent {
  color: white;
  background:
    radial-gradient(circle at top right, rgba(244, 197, 66, 0.34), transparent 13rem),
    linear-gradient(135deg, var(--burgundy-800), var(--burgundy-950));
}

.panel-topline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  color: var(--burgundy-650);
  font-size: 0.78rem;
  font-weight: 900;
  text-transform: uppercase;
}

.paper-panel.accent .panel-topline {
  color: var(--gold-300);
}

.panel-topline span {
  display: grid;
  place-items: center;
  width: 2.3rem;
  height: 2.3rem;
  border-radius: 50%;
  background: var(--gold-500);
  color: var(--burgundy-950);
}

.paper-panel h3 {
  margin: 3rem 0 0.8rem;
  color: var(--burgundy-950);
  font-size: 1.85rem;
  line-height: 1.05;
}

.paper-panel.accent h3 {
  color: white;
}

.paper-panel p {
  color: var(--muted);
}

.paper-panel.accent p {
  color: rgba(255, 250, 240, 0.82);
}

.comparison-table {
  display: grid;
  margin-top: 1rem;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 0.75rem;
  background: rgba(255, 253, 248, 0.9);
  box-shadow: 0 18px 56px rgba(38, 4, 13, 0.1);
  backdrop-filter: blur(16px);
}

.comparison-table > div {
  display: grid;
  grid-template-columns: minmax(9rem, 0.42fr) minmax(0, 1fr) minmax(0, 1fr);
  border-top: 1px solid var(--line);
}

.comparison-table > div:first-child {
  border-top: 0;
}

.comparison-table span {
  padding: 0.95rem;
  border-left: 1px solid var(--line);
}

.comparison-table span:first-child {
  border-left: 0;
  color: var(--burgundy-950);
  font-weight: 900;
}

.comparison-head {
  color: var(--burgundy-950);
  background: linear-gradient(135deg, var(--gold-500), var(--gold-100));
  font-weight: 950;
}

.pathway-layout,
.simulator-grid {
  display: grid;
  grid-template-columns: minmax(16rem, 0.44fr) minmax(0, 1fr);
  gap: 1rem;
  margin-top: 1.4rem;
}

.pathway-track,
.case-list,
.figure-tabs {
  display: grid;
  gap: 0.55rem;
  align-content: start;
  padding: 0.75rem;
}

.path-step,
.figure-tab,
.case-card {
  display: grid;
  grid-template-columns: 2.4rem 1fr;
  gap: 0.8rem;
  align-items: center;
  width: 100%;
  min-height: 4rem;
  padding: 0.7rem;
  color: var(--burgundy-800);
  text-align: left;
  border: 1px solid transparent;
  border-radius: 0.55rem;
  background: transparent;
}

.path-step span,
.figure-tab span {
  display: grid;
  place-items: center;
  width: 2.35rem;
  height: 2.35rem;
  color: var(--burgundy-950);
  border-radius: 50%;
  background: var(--gold-500);
  font-size: 0.76rem;
  font-weight: 950;
}

.path-step:hover,
.path-step.active,
.figure-tab:hover,
.figure-tab.active,
.case-card:hover,
.case-card.active {
  background: var(--paper-strong);
  border-color: rgba(93, 16, 36, 0.2);
  transform: translateX(0.2rem);
}

.mechanism-stage {
  position: relative;
  min-height: 36rem;
  overflow: hidden;
  padding: clamp(1.3rem, 4vw, 2.4rem);
  color: white;
  background:
    radial-gradient(circle at 82% 78%, rgba(244, 197, 66, 0.24), transparent 17rem),
    linear-gradient(135deg, var(--burgundy-800), var(--burgundy-950));
}

.mechanism-stage h3,
.case-workbench h3,
.figure-viewer h3 {
  margin: 0 0 0.8rem;
  font-size: clamp(1.9rem, 4vw, 3.4rem);
  line-height: 1.02;
}

.atlas-card h3 {
  max-width: 100%;
  margin: 0 0 0.8rem;
  font-size: clamp(1.65rem, 2.6vw, 2.45rem);
  line-height: 1.05;
  overflow-wrap: anywhere;
  word-break: normal;
}

.mechanism-stage p:not(.micro-label) {
  max-width: 44rem;
  color: rgba(255, 250, 240, 0.82);
}

#pathway-points {
  display: grid;
  gap: 0.72rem;
  max-width: 45rem;
  padding: 0;
  margin: 1.5rem 0 0;
  list-style: none;
}

#pathway-points li {
  padding: 0.85rem 0.95rem;
  border: 1px solid rgba(255, 227, 138, 0.26);
  border-radius: 0.55rem;
  background: rgba(255, 255, 255, 0.08);
}

.stage-orbit {
  position: absolute;
  right: -5rem;
  bottom: -5rem;
  width: 25rem;
  height: 25rem;
  opacity: 0.65;
}

.stage-orbit span {
  position: absolute;
  inset: 12%;
  border: 1px solid rgba(255, 227, 138, 0.35);
  border-radius: 50%;
}

.stage-orbit span:nth-child(2) { inset: 28%; }
.stage-orbit span:nth-child(3) { inset: 44%; background: var(--gold-500); }

.atlas-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(20rem, 0.42fr);
  gap: 1rem;
}

.atlas-toolbar {
  grid-column: 1 / -1;
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  padding: 0.75rem;
  box-shadow: none;
}

.filter-chip,
.segmented button,
.tool-option {
  color: var(--burgundy-800);
  border: 1px solid rgba(93, 16, 36, 0.22);
  border-radius: 999px;
  background: var(--paper-strong);
  padding: 0.58rem 0.88rem;
}

.filter-chip.active,
.segmented button.active,
.tool-option.active {
  color: var(--burgundy-950);
  border-color: transparent;
  background: var(--gold-500);
  font-weight: 900;
}

.knowledge-map {
  width: 100%;
  min-height: 35rem;
  border: 1px solid rgba(244, 197, 66, 0.22);
  border-radius: 0.75rem;
  background:
    radial-gradient(circle at center, rgba(244, 197, 66, 0.2), transparent 18rem),
    linear-gradient(135deg, rgba(38, 4, 13, 0.96), rgba(93, 16, 36, 0.9));
  box-shadow: var(--shadow);
}

.graph-line {
  stroke: rgba(255, 227, 138, 0.28);
  stroke-width: 2.2;
}

.graph-node {
  cursor: pointer;
}

.graph-node circle {
  fill: rgba(255, 250, 240, 0.94);
  stroke: var(--gold-500);
  stroke-width: 3;
  filter: url("#nodeGlow");
}

.graph-node text {
  fill: var(--burgundy-950);
  font-size: 14px;
  font-weight: 900;
  pointer-events: none;
}

.graph-node.active circle,
.graph-node:hover circle {
  fill: var(--gold-500);
  stroke: white;
  stroke-width: 4;
}

.graph-node.dimmed,
.graph-line.dimmed {
  opacity: 0.18;
}

.atlas-card,
.case-workbench {
  align-self: stretch;
  padding: 1.2rem;
}

.atlas-card {
  min-width: 0;
  overflow: hidden;
}

.atlas-card p:not(.micro-label),
.case-workbench p,
.feedback,
.figure-viewer p {
  color: var(--muted);
}

.map-links,
.segmented,
.tool-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin-top: 1rem;
}

.map-links span {
  padding: 0.45rem 0.6rem;
  color: var(--burgundy-950);
  border-radius: 999px;
  background: var(--gold-100);
  font-size: 0.84rem;
  font-weight: 850;
}

.figure-layout {
  display: grid;
  grid-template-columns: minmax(18rem, 0.42fr) minmax(0, 1fr);
  gap: 1rem;
}

.figure-viewer {
  overflow: hidden;
}

.figure-viewer img {
  display: block;
  width: 100%;
  max-height: 34rem;
  object-fit: contain;
  background: var(--paper-strong);
  border-bottom: 1px solid var(--line);
}

.figure-viewer div {
  padding: 1.2rem;
}

#figure-signals {
  display: grid;
  gap: 0.5rem;
  padding: 0;
  margin: 1rem 0 0;
  list-style: none;
}

#figure-signals li {
  padding: 0.7rem 0.8rem;
  border-radius: 0.55rem;
  background: var(--gold-100);
  color: var(--burgundy-950);
}

.case-card {
  display: block;
  background: var(--paper-strong);
}

.case-card strong,
.case-card span {
  display: block;
}

.case-card span {
  color: var(--muted);
  font-size: 0.88rem;
}

.choice-block {
  margin-top: 1.35rem;
}

.choice-block h4 {
  margin: 0 0 0.7rem;
  color: var(--burgundy-950);
}

.tool-option {
  border-radius: 0.55rem;
}

.primary-action {
  margin-top: 1.35rem;
}

.feedback {
  min-height: 5rem;
  margin-top: 1rem;
  padding: 1rem;
  border: 1px solid rgba(93, 16, 36, 0.18);
  border-radius: 0.55rem;
  background: var(--gold-100);
}

.footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem 1rem;
  padding: 2.2rem 1rem 3rem;
  color: rgba(255, 250, 240, 0.72);
  background: var(--burgundy-950);
}

.footer strong {
  color: var(--gold-500);
}

@media (max-width: 980px) {
  .hero-grid,
  .section-title,
  .pathway-layout,
  .atlas-grid,
  .figure-layout,
  .simulator-grid {
    grid-template-columns: 1fr;
  }

  .paper-grid {
    grid-template-columns: 1fr;
  }

  .comparison-table > div {
    grid-template-columns: 1fr;
  }

  .comparison-table span {
    border-left: 0;
    border-top: 1px solid var(--line);
  }

  .comparison-table span:first-child {
    border-top: 0;
    background: var(--gold-100);
  }

  .hero-grid {
    align-items: center;
    min-height: auto;
    padding-top: 4rem;
  }

  .hero-side {
    padding-top: 0;
  }

  .band-visual {
    min-height: 36.4rem;
  }
}

@media (max-width: 680px) {
  .topbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .nav {
    width: 100%;
    overflow-x: auto;
  }

  .brand small {
    max-width: 16rem;
  }

  .hero-copy h1 {
    font-size: 2.75rem;
    line-height: 0.96;
  }

  .band-visual {
    min-height: 30rem;
  }

  #band-animation {
    min-height: 24rem;
  }

  .knowledge-map {
    min-height: 29rem;
  }
}