:root {
  --ink: #102033;
  --muted: #5e6b7c;
  --line: #dce4ee;
  --paper: #f7fafc;
  --white: #ffffff;
  --navy: #102033;
  --blue: #2f6fbb;
  --teal: #0f9f8f;
  --green: #4e9a51;
  --orange: #d97628;
  --rose: #c24b78;
  --violet: #6d5bd0;
  --shadow: 0 24px 70px rgba(16, 32, 51, 0.16);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  letter-spacing: 0;
}

a {
  color: inherit;
  text-decoration: none;
}

.site-header {
  position: fixed;
  z-index: 20;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px clamp(18px, 4vw, 54px);
  color: #edf6ff;
  background: rgba(16, 32, 51, 0.72);
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
}

.brand-mark {
  display: grid;
  width: 32px;
  height: 32px;
  place-items: center;
  color: var(--navy);
  background: #f6c04d;
  border-radius: 7px;
}

nav {
  display: flex;
  gap: clamp(12px, 2vw, 26px);
  font-size: 14px;
  font-weight: 700;
}

nav a {
  color: rgba(237, 246, 255, 0.82);
}

nav a:hover {
  color: #ffffff;
}

.hero {
  position: relative;
  display: grid;
  min-height: 84vh;
  overflow: hidden;
  color: #f8fbff;
  background: #102033;
}

#hero-canvas,
.hero-shade {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.hero-shade {
  background:
    linear-gradient(90deg, rgba(16, 32, 51, 0.92), rgba(16, 32, 51, 0.62) 48%, rgba(16, 32, 51, 0.34)),
    linear-gradient(180deg, rgba(16, 32, 51, 0.35), rgba(16, 32, 51, 0.96));
}

.hero-copy {
  position: relative;
  z-index: 1;
  align-self: center;
  width: min(960px, calc(100% - 40px));
  margin: 0 auto;
  padding-top: 80px;
}

.eyebrow,
.section-kicker {
  margin: 0 0 14px;
  color: #f6c04d;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 12px;
  font-size: clamp(60px, 12vw, 132px);
  line-height: 0.92;
  letter-spacing: 0;
}

.paper-title {
  max-width: 850px;
  margin-bottom: 18px;
  color: #ffffff;
  font-size: clamp(26px, 5.2vw, 60px);
  font-weight: 800;
  line-height: 1.02;
}

h2 {
  margin-bottom: 16px;
  font-size: clamp(32px, 5vw, 58px);
  line-height: 1;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 10px;
  font-size: 20px;
  line-height: 1.18;
}

.hero-lede {
  max-width: 760px;
  color: rgba(248, 251, 255, 0.86);
  font-size: clamp(18px, 2.5vw, 25px);
  line-height: 1.45;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 30px 0 44px;
}

.button {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  padding: 12px 18px;
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: 8px;
  color: #f8fbff;
  font-weight: 800;
}

.button.primary {
  color: #102033;
  background: #f6c04d;
  border-color: #f6c04d;
}

.stats-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(120px, 1fr));
  width: min(820px, 100%);
  margin: 0;
  border-top: 1px solid rgba(255, 255, 255, 0.22);
}

.stats-strip div {
  padding: 18px 18px 12px 0;
}

.stats-strip dt {
  font-size: clamp(24px, 4vw, 40px);
  font-weight: 800;
}

.stats-strip dd {
  margin: 2px 0 0;
  color: rgba(248, 251, 255, 0.74);
  font-weight: 700;
}

section:not(.hero) {
  padding: clamp(56px, 9vw, 112px) 0;
}

.section-inner {
  width: min(1160px, calc(100% - 36px));
  margin: 0 auto;
}

.overview-section {
  background: var(--white);
}

.overview-grid,
.quickstart-grid,
.downloads-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
  gap: clamp(28px, 5vw, 72px);
  align-items: center;
}

.overview-grid p,
.section-heading p,
.quickstart-grid p {
  color: var(--muted);
  font-size: 17px;
  line-height: 1.68;
}

.layer-rail {
  display: grid;
  gap: 10px;
}

.layer-rail span {
  display: flex;
  min-height: 58px;
  align-items: center;
  padding: 0 20px;
  border-left: 8px solid var(--blue);
  background: #eef5fb;
  border-radius: 8px;
  color: var(--ink);
  font-size: clamp(18px, 2.2vw, 28px);
  font-weight: 800;
}

.layer-rail span:nth-child(2) {
  border-color: var(--teal);
  background: #edf8f6;
}

.layer-rail span:nth-child(3) {
  border-color: var(--violet);
  background: #f2f0ff;
}

.layer-rail span:nth-child(4) {
  border-color: var(--orange);
  background: #fff4eb;
}

.layer-rail span:nth-child(5) {
  border-color: var(--rose);
  background: #fff0f5;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 34px;
}

.kg-section,
.quickstart-section {
  background: #edf3f8;
}

.kg-workbench {
  overflow: hidden;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.kg-toolbar {
  padding: 18px;
  border-bottom: 1px solid var(--line);
  background: #fbfdff;
}

.search-label {
  display: block;
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
  text-transform: uppercase;
}

#kg-search {
  width: 100%;
  min-height: 48px;
  padding: 0 14px;
  border: 1px solid #c8d3df;
  border-radius: 8px;
  color: var(--ink);
  font: inherit;
  font-size: 16px;
}

.query-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.query-chips button,
.terminal button {
  min-height: 34px;
  border: 1px solid #c8d3df;
  border-radius: 7px;
  background: #ffffff;
  color: var(--ink);
  font: inherit;
  font-size: 13px;
  font-weight: 800;
  cursor: pointer;
}

.query-chips button {
  padding: 7px 10px;
}

.graph-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 320px);
  min-height: 560px;
}

#kg-svg {
  width: 100%;
  min-height: 560px;
  background: #f7fafc;
}

.edge-line {
  stroke: rgba(64, 82, 105, 0.28);
  stroke-width: 1.2;
  cursor: pointer;
}

.edge-line.active,
.edge-line:hover {
  stroke: #102033;
  stroke-width: 2.4;
}

.node {
  cursor: pointer;
}

.node circle {
  stroke: #ffffff;
  stroke-width: 2.5;
  filter: drop-shadow(0 7px 12px rgba(16, 32, 51, 0.18));
}

.node text {
  fill: #102033;
  paint-order: stroke;
  stroke: rgba(255, 255, 255, 0.86);
  stroke-width: 4px;
  font-size: 12px;
  font-weight: 800;
  pointer-events: none;
}

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

.inspector {
  padding: 22px;
  border-left: 1px solid var(--line);
  background: #ffffff;
}

.inspector-label {
  margin: 0 0 12px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.inspector h3 {
  font-size: 24px;
}

.inspector p,
.inspector li {
  color: var(--muted);
  line-height: 1.55;
}

.inspector ul {
  padding-left: 18px;
}

.pill {
  display: inline-flex;
  margin: 4px 5px 4px 0;
  padding: 5px 8px;
  border-radius: 7px;
  background: #edf3f8;
  color: var(--ink);
  font-size: 12px;
  font-weight: 800;
}

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  padding: 14px 18px 18px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
}

.legend span {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--blue);
}

.dot.phenotype { background: var(--teal); }
.dot.gene { background: var(--violet); }
.dot.treatment { background: var(--orange); }
.dot.outcome { background: var(--rose); }

.benchmark-section,
.downloads-section,
.citation-section {
  background: var(--white);
}

.task-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 14px;
}

.task-card {
  min-height: 248px;
  padding: 22px;
  border: 1px solid var(--line);
  border-top: 8px solid var(--blue);
  border-radius: 8px;
  background: #ffffff;
}

.task-card span {
  display: inline-flex;
  margin-bottom: 20px;
  color: var(--blue);
  font-weight: 900;
}

.task-card p {
  color: var(--muted);
  line-height: 1.52;
}

.task-card code {
  color: #324152;
  font-size: 12px;
  font-weight: 800;
}

.task-card.t2 { border-top-color: var(--teal); }
.task-card.t2 span { color: var(--teal); }
.task-card.t3 { border-top-color: var(--violet); }
.task-card.t3 span { color: var(--violet); }
.task-card.t4 { border-top-color: var(--orange); }
.task-card.t4 span { color: var(--orange); }
.task-card.t5 { border-top-color: var(--rose); }
.task-card.t5 span { color: var(--rose); }

.terminal,
.citation-section pre {
  position: relative;
  overflow: auto;
  border-radius: 8px;
  background: #111c2b;
  color: #e9f2ff;
  box-shadow: var(--shadow);
}

.terminal button {
  position: absolute;
  top: 12px;
  right: 12px;
  padding: 0 11px;
}

pre {
  margin: 0;
  padding: 26px;
}

code {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  line-height: 1.6;
}

.download-list {
  display: grid;
  gap: 12px;
}

.download-list a {
  display: block;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-left: 8px solid var(--blue);
  border-radius: 8px;
  background: #ffffff;
}

.download-list a:nth-child(2) { border-left-color: var(--teal); }
.download-list a:nth-child(3) { border-left-color: var(--orange); }
.download-list a:nth-child(4) { border-left-color: var(--rose); }
.download-list a:nth-child(5) { border-left-color: var(--violet); }

.download-list strong,
.download-list span {
  display: block;
}

.download-list span {
  margin-top: 4px;
  color: var(--muted);
}

footer {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 26px clamp(18px, 4vw, 54px);
  color: rgba(248, 251, 255, 0.76);
  background: var(--navy);
  font-weight: 700;
}

/* Laptop / medium screens: keep benchmark cards readable. */
@media (max-width: 1180px) {
  .task-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .task-card {
    min-height: 220px;
  }
}

/* Tablet / narrow laptop screens: simplify navigation and stack the KG inspector. */
@media (max-width: 980px) {
  nav {
    display: none;
  }

  .overview-grid,
  .quickstart-grid,
  .downloads-grid,
  .graph-panel {
    grid-template-columns: 1fr;
  }

  .graph-panel {
    min-height: auto;
  }

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

  .task-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* Mobile screens: compact the hero, graph, inspector, and code blocks. */
@media (max-width: 680px) {
  .site-header {
    padding: 12px 14px;
  }

  .hero {
    min-height: 82vh;
  }

  .hero-copy {
    width: min(100% - 28px, 960px);
    padding-top: 70px;
  }

  h1 {
    font-size: clamp(48px, 18vw, 78px);
  }

  h2 {
    font-size: clamp(30px, 10vw, 42px);
  }

  .paper-title {
    font-size: clamp(25px, 8vw, 38px);
    line-height: 1.08;
  }

  .hero-lede {
    font-size: 16px;
  }

  .section-inner {
    width: min(100% - 28px, 1160px);
  }

  .stats-strip,
  .task-grid {
    grid-template-columns: 1fr;
  }

  .hero-actions {
    display: grid;
  }

  #kg-svg {
    min-height: 430px;
  }

  .kg-toolbar,
  .inspector {
    padding: 14px;
  }

  pre {
    padding: 20px 14px;
  }

  code {
    font-size: 12px;
  }

  footer {
    display: grid;
  }
}