:root {
  --bg: #0b0f14;
  --surface: #11161d;
  --surface-soft: #151b23;
  --text: #eef2f7;
  --muted: #98a2b3;
  --border: rgba(255, 255, 255, 0.08);
  --accent: #6aa9ff;
  --accent-soft: rgba(106, 169, 255, 0.14);
  --shadow: 0 20px 60px rgba(0, 0, 0, 0.28);
  --radius: 18px;
  --radius-sm: 14px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

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

.launch-shell {
  max-width: 1160px;
  margin: 0 auto;
  padding: 24px 24px 72px;
}

.site-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 12px 0 18px;
}

.site-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.site-brand-mark {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--surface);
}

.site-brand-mark img {
  display: block;
  width: 100%;
  height: 100%;
}

.site-brand-copy {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.site-brand-copy strong {
  font-size: 16px;
  letter-spacing: 0.01em;
}

.site-brand-copy span {
  color: var(--muted);
  font-size: 13px;
}

.site-nav-links {
  display: flex;
  align-items: center;
  gap: 18px;
  color: var(--muted);
  font-size: 14px;
}

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

.hero {
  padding: 48px 0 28px;
}

.hero-wrap {
  max-width: 760px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--muted);
  font-size: 12px;
  margin-bottom: 18px;
}

.eyebrow-dot {
  width: 7px;
  height: 7px;
  border-radius: 999px;
  background: var(--accent);
}

.hero h1 {
  font-size: clamp(42px, 7vw, 72px);
  line-height: 0.98;
  letter-spacing: -0.04em;
  margin: 0 0 18px;
  max-width: 860px;
}

.hero p {
  margin: 0 0 28px;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.65;
  max-width: 680px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 22px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 18px;
  border-radius: 999px;
  font-size: 14px;
  border: 1px solid transparent;
  transition: transform 0.15s ease, border-color 0.15s ease, background 0.15s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--accent);
  color: #07111f;
  font-weight: 600;
}

.btn-secondary {
  background: var(--surface);
  border-color: var(--border);
  color: var(--text);
}

.btn-secondary:hover,
.btn-tertiary:hover {
  border-color: rgba(106, 169, 255, 0.38);
}

.btn-tertiary {
  background: transparent;
  border-color: var(--border);
  color: var(--muted);
}

.hero-note {
  font-size: 13px;
  color: var(--muted);
}

.launch-panel {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(320px, 0.9fr);
  gap: 18px;
  margin-top: 24px;
}

.panel-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
}

.panel-card h2,
.panel-card h3 {
  margin: 0 0 12px;
}

.panel-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.6;
}

.alpha-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 18px;
}

.alpha-node {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px;
  background: var(--surface-soft);
}

.alpha-node strong {
  display: block;
  margin-bottom: 6px;
  font-size: 14px;
}

.alpha-node span {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.5;
}

.section {
  padding: 30px 0 0;
}

.section-header {
  max-width: 680px;
  margin-bottom: 18px;
}

.section-header h2 {
  margin: 0 0 10px;
  font-size: 30px;
  letter-spacing: -0.03em;
}

.section-header p {
  margin: 0;
  color: var(--muted);
  line-height: 1.65;
}

.three-grid,
.entry-grid,
.video-grid,
.start-grid,
.architecture-grid {
  display: grid;
  gap: 16px;
}

.three-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.entry-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.video-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.start-grid {
  grid-template-columns: minmax(0, 1.1fr) minmax(280px, 0.9fr);
}

.architecture-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}

.card h3 {
  margin: 0 0 10px;
  font-size: 18px;
}

.card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.6;
}

.command-card {
  min-height: 100%;
}

.command-block {
  margin: 14px 0 0;
  padding: 16px 18px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: #0f141b;
  color: #d8e5ff;
  overflow-x: auto;
}

.command-block code {
  display: block;
  font-family: "SFMono-Regular", "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 14px;
  line-height: 1.7;
  white-space: pre;
}

.demo-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.9fr);
  gap: 18px;
}

.flow-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 12px;
}

.flow-list li {
  display: grid;
  grid-template-columns: 120px minmax(0, 1fr);
  gap: 16px;
  align-items: start;
  padding: 16px 18px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--surface);
}

.flow-list strong {
  font-size: 15px;
}

.flow-list span {
  color: var(--muted);
  line-height: 1.6;
}

.demo-card p {
  margin-top: 14px;
}

.comparison-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px;
  overflow-x: auto;
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 640px;
}

.comparison-table th,
.comparison-table td {
  text-align: left;
  padding: 16px 18px;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

.comparison-table th {
  font-size: 14px;
  color: var(--text);
}

.comparison-table td {
  color: var(--muted);
  line-height: 1.6;
}

.comparison-table tbody tr:last-child td {
  border-bottom: 0;
}

.why-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  list-style: none;
  padding: 0;
  margin: 0;
}

.why-list li {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px 18px;
  font-size: 15px;
  line-height: 1.55;
}

.video-thumb {
  display: grid;
  place-items: center;
  height: 148px;
  border-radius: 12px;
  border: 1px dashed rgba(255, 255, 255, 0.14);
  background: rgba(255, 255, 255, 0.02);
  color: var(--muted);
  font-size: 13px;
  margin-bottom: 16px;
}

.video-status,
.card-status {
  display: inline-flex;
  margin-top: 14px;
  color: var(--accent);
  font-size: 13px;
}

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

.entry-card {
  display: block;
  min-height: 176px;
}

.entry-card:hover {
  border-color: rgba(106, 169, 255, 0.36);
}

.entry-card code {
  display: inline-block;
  margin-top: 14px;
  color: var(--accent);
  font-size: 13px;
}

.agent-card {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(260px, 0.8fr);
  gap: 18px;
}

.agent-links {
  display: grid;
  gap: 12px;
}

.agent-link {
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 14px;
  background: var(--surface-soft);
}

.agent-link strong {
  display: block;
  margin-bottom: 5px;
  font-size: 14px;
}

.agent-link span {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.5;
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 34px 0 0;
  margin-top: 28px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 13px;
}

.site-footer-links {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.site-footer-links a:hover {
  color: var(--text);
}

@media (max-width: 960px) {
  .launch-panel,
  .three-grid,
  .entry-grid,
  .video-grid,
  .start-grid,
  .architecture-grid,
  .demo-layout,
  .why-list,
  .agent-card {
    grid-template-columns: minmax(0, 1fr);
  }

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

@media (max-width: 760px) {
  .launch-shell {
    padding: 18px 18px 56px;
  }

  .site-nav {
    flex-direction: column;
    align-items: flex-start;
  }

  .site-nav-links {
    flex-wrap: wrap;
    gap: 12px 16px;
  }

  .hero {
    padding-top: 28px;
  }

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

  .flow-list li {
    grid-template-columns: minmax(0, 1fr);
    gap: 8px;
  }

  .site-footer {
    flex-direction: column;
    align-items: flex-start;
  }
}