:root {
  --bg: #07110f;
  --panel: #0e1c19;
  --panel-soft: #132722;
  --text: #eef8f4;
  --muted: #a9bbb4;
  --line: rgba(255, 255, 255, 0.12);
  --accent: #78f2c0;
  --accent-strong: #33d699;
  --warning: #f7d37b;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.38);
  --radius-lg: 28px;
  --radius-md: 18px;
  --max: 1180px;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at 15% 5%, rgba(120, 242, 192, 0.16), transparent 32rem),
    radial-gradient(circle at 88% 12%, rgba(80, 158, 255, 0.12), transparent 34rem),
    linear-gradient(180deg, #07110f 0%, #0a1513 52%, #08100f 100%);
  color: var(--text);
}

a {
  color: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max);
  margin: 0 auto;
  padding: 22px 24px;
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--text);
  font-weight: 760;
  text-decoration: none;
  letter-spacing: -0.03em;
}

.brand-mark {
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(120, 242, 192, 0.24), rgba(255, 255, 255, 0.05));
  color: var(--accent);
}

.nav {
  display: flex;
  align-items: center;
  gap: 20px;
  color: var(--muted);
  font-size: 14px;
}

.nav a {
  text-decoration: none;
}

.nav a:hover {
  color: var(--text);
}

.nav-cta {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 10px 14px;
  color: var(--text);
  background: rgba(255, 255, 255, 0.05);
}

.hero,
.section {
  max-width: var(--max);
  margin: 0 auto;
  padding: 84px 24px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(300px, 0.8fr);
  gap: 46px;
  align-items: center;
  min-height: 76vh;
}

.eyebrow {
  color: var(--accent);
  margin: 0 0 18px;
  font-size: 13px;
  font-weight: 740;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

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

h1 {
  max-width: 780px;
  margin-bottom: 22px;
  font-size: clamp(44px, 7vw, 86px);
  line-height: 0.92;
  letter-spacing: -0.075em;
}

h2 {
  max-width: 820px;
  margin-bottom: 26px;
  font-size: clamp(32px, 4vw, 56px);
  line-height: 1;
  letter-spacing: -0.055em;
}

h3 {
  margin-bottom: 10px;
  font-size: 21px;
  letter-spacing: -0.025em;
}

.hero-text,
.section p {
  color: var(--muted);
  font-size: 18px;
  line-height: 1.68;
}

.hero-text {
  max-width: 720px;
  font-size: 21px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin: 34px 0 18px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  border-radius: 999px;
  padding: 0 20px;
  font-weight: 760;
  text-decoration: none;
}

.button.primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  color: #03110c;
}

.button.secondary {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.05);
  color: var(--text);
}

.button.full {
  width: 100%;
}

.small-note {
  max-width: 760px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.6;
}

.hero-card,
.request-card,
.route-card,
.problem-grid article,
.boundary-grid article {
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.035));
  box-shadow: var(--shadow);
}

.hero-card {
  padding: 26px;
}

.card-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 26px;
  color: var(--accent);
  font-size: 14px;
  font-weight: 760;
}

.status-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 22px rgba(120, 242, 192, 0.9);
}

.signal-list {
  display: grid;
  gap: 18px;
  margin: 0;
}

.signal-list div {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(0, 0, 0, 0.18);
}

.signal-list dt {
  margin-bottom: 6px;
  color: var(--text);
  font-weight: 780;
}

.signal-list dd {
  margin: 0;
  color: var(--muted);
  line-height: 1.5;
}

.problem {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 36px;
}

.problem-grid,
.route-grid,
.boundary-grid {
  display: grid;
  gap: 18px;
}

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

.problem-grid article,
.boundary-grid article {
  padding: 24px;
}

.route-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin: 34px 0 24px;
}

.route-card {
  padding: 26px;
}

.route-number {
  display: inline-flex;
  margin-bottom: 34px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 800;
}

.route-card ul {
  display: grid;
  gap: 8px;
  margin: 22px 0 0;
  padding-left: 18px;
  color: var(--muted);
}

.demo-panel {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 34px;
  align-items: start;
}

.steps {
  display: grid;
  gap: 14px;
}

.steps div {
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: 14px;
  align-items: center;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.045);
}

.steps span {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border-radius: 14px;
  background: rgba(120, 242, 192, 0.13);
  color: var(--accent);
  font-weight: 860;
}

.steps p {
  margin: 0;
  color: var(--text);
  font-weight: 700;
}

.split {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 34px;
  align-items: start;
}

.output-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.output-list p {
  margin: 0;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.045);
  color: var(--text);
  font-weight: 700;
}

.boundary-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 28px;
}

.request {
  display: grid;
  grid-template-columns: 1fr 420px;
  gap: 36px;
  align-items: start;
}

.request-card {
  padding: 26px;
}

.form-warning {
  margin-top: 18px;
  color: var(--warning);
  font-size: 14px;
  line-height: 1.6;
}

.site-footer {
  max-width: var(--max);
  margin: 0 auto;
  padding: 36px 24px 54px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
  line-height: 1.6;
}

@media (max-width: 900px) {
  .nav {
    display: none;
  }

  .hero,
  .problem,
  .demo-panel,
  .split,
  .request {
    grid-template-columns: 1fr;
  }

  .route-grid,
  .boundary-grid {
    grid-template-columns: 1fr;
  }

  .output-list {
    grid-template-columns: 1fr;
  }

  .hero,
  .section {
    padding: 58px 20px;
  }
}