:root {
  color-scheme: dark;
  --bg: #0f1319;
  --panel: #151a23;
  --panel-2: #1a202b;
  --line: #2a3140;
  --line-strong: #3a4558;
  --text: #edf2fa;
  --muted: #98a4b8;
  --soft: #c1cad9;
  --accent: #78a8ff;
  --accent-2: #72d7c7;
  --radius: 14px;
  --mono: "Cascadia Code", "SFMono-Regular", Consolas, monospace;
  --sans: "Segoe UI", "Aptos", "SF Pro Text", system-ui, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    linear-gradient(135deg, rgba(120, 168, 255, 0.08), transparent 28%),
    linear-gradient(215deg, rgba(114, 215, 199, 0.05), transparent 36%),
    var(--bg);
  color: var(--text);
  font-family: var(--sans);
}

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

code,
pre {
  font-family: var(--mono);
}

.shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 52px 248px minmax(0, 1fr);
}

.activity {
  position: sticky;
  top: 0;
  height: 100vh;
  border-right: 1px solid var(--line);
  background: #0d1117;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  padding: 12px 0;
}

.mark {
  width: 32px;
  height: 32px;
  border: 1px solid var(--line-strong);
  display: grid;
  place-items: center;
  color: var(--accent);
  font: 700 12px var(--mono);
}

.activity a {
  color: var(--muted);
  font: 600 11px var(--mono);
  padding: 8px 0;
}

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

.sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  border-right: 1px solid var(--line);
  background: rgba(21, 26, 35, 0.92);
  padding: 18px 16px;
}

.brand {
  display: grid;
  gap: 4px;
  margin-bottom: 22px;
}

.brand-title {
  font-size: 15px;
  font-weight: 700;
}

.brand-subtitle,
.label {
  color: var(--muted);
  font: 600 11px var(--mono);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.nav {
  display: grid;
  gap: 2px;
}

.nav a {
  color: var(--soft);
  padding: 8px 10px;
  border-radius: 8px;
  font-size: 13px;
}

.nav a:hover {
  background: rgba(120, 168, 255, 0.1);
  color: var(--text);
}

.sidebar-panel {
  margin-top: 24px;
  border: 1px solid var(--line);
  background: var(--panel-2);
  padding: 12px;
  border-radius: 10px;
  display: grid;
  gap: 8px;
}

.sidebar-panel code {
  color: var(--accent-2);
  font-size: 12px;
  overflow-wrap: anywhere;
}

.main {
  min-width: 0;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  height: 42px;
  border-bottom: 1px solid var(--line);
  background: rgba(15, 19, 25, 0.9);
  backdrop-filter: blur(16px);
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 22px;
  color: var(--muted);
  font-size: 12px;
}

.hero,
.section {
  margin: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.hero {
  min-height: 390px;
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(320px, 0.8fr);
  gap: 22px;
  align-items: center;
  padding: 34px;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--accent-2);
  font: 700 11px var(--mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

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

h1 {
  max-width: 760px;
  margin-bottom: 16px;
  font-size: clamp(34px, 5vw, 64px);
  line-height: 0.98;
  letter-spacing: -0.045em;
}

h2 {
  margin-bottom: 8px;
  font-size: 26px;
  letter-spacing: -0.025em;
}

h3 {
  margin-bottom: 8px;
  font-size: 18px;
}

.hero-copy,
.section-head p,
.component-card p,
.runtime-preview p {
  color: var(--soft);
  line-height: 1.65;
}

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

.actions a,
.primary {
  border: 1px solid var(--line-strong);
  color: var(--text);
  padding: 10px 13px;
  border-radius: 8px;
  font-size: 13px;
  background: transparent;
  cursor: pointer;
}

.actions .primary,
.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #07111f;
  font-weight: 700;
}

.actions a:hover,
.primary:hover {
  opacity: 0.86;
}

.hero-terminal {
  padding: 18px;
  display: grid;
  gap: 12px;
}

.terminal-row {
  display: flex;
  justify-content: space-between;
  border-bottom: 1px solid rgba(160, 176, 204, 0.14);
  padding-bottom: 10px;
  color: var(--muted);
  font: 13px var(--mono);
}

.terminal-row strong {
  color: var(--text);
}

.section {
  background: rgba(21, 26, 35, 0.72);
  padding: 22px;
}

.section-head {
  display: grid;
  gap: 0;
  margin-bottom: 18px;
}

.metric-grid,
.component-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.metric-card,
.component-card,
.control-panel,
.runtime-preview,
.code-slab {
  border: 1px solid var(--line);
  background: var(--panel);
  border-radius: 12px;
}

.metric-card {
  padding: 16px;
  display: grid;
  gap: 8px;
}

.metric-card strong {
  font: 800 30px var(--mono);
  color: var(--text);
}

.metric-card span:last-child {
  color: var(--muted);
  font-size: 12px;
}

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

.charts img {
  width: 100%;
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #0f1319;
}

.charts img:last-child {
  grid-column: span 2;
  max-width: 620px;
}

.component-card {
  padding: 18px;
  min-height: 180px;
}

.integration-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.integration-list span,
.test-grid span {
  border: 1px solid var(--line);
  background: var(--panel-2);
  color: var(--soft);
  border-radius: 999px;
  padding: 7px 10px;
  font-size: 12px;
}

.code-slab {
  margin: 16px 0 0;
  padding: 16px;
  overflow: auto;
  color: #dce8ff;
  line-height: 1.6;
}

.runtime-layout {
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr);
  gap: 14px;
}

.control-panel {
  padding: 16px;
  display: grid;
  gap: 12px;
}

label {
  display: grid;
  gap: 6px;
  color: var(--muted);
  font-size: 12px;
}

select {
  width: 100%;
  border: 1px solid var(--line-strong);
  background: #111721;
  color: var(--text);
  border-radius: 8px;
  padding: 9px 10px;
}

.status {
  margin: 0;
  color: var(--muted);
  font: 12px var(--mono);
}

.runtime-preview {
  min-height: 280px;
  padding: 24px;
  display: grid;
  align-content: end;
}

.test-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

@media (max-width: 980px) {
  .shell {
    grid-template-columns: 1fr;
  }

  .activity,
  .sidebar {
    position: static;
    height: auto;
  }

  .activity {
    flex-direction: row;
    justify-content: flex-start;
    padding: 10px 14px;
  }

  .sidebar {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .hero,
  .runtime-layout,
  .metric-grid,
  .component-grid,
  .charts {
    grid-template-columns: 1fr;
  }

  .charts img:last-child {
    grid-column: auto;
  }
}