:root {
  --demo-bg: #0f1117;
  --demo-panel: #181c25;
  --demo-border: rgba(255, 255, 255, 0.08);
  --demo-text: #f4f5fb;
  --demo-muted: #9da7bd;
}

body.demo-shell {
  margin: 0;
  min-height: 100vh;
  font: 15px/1.5 -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: radial-gradient(circle at top, #1e2741 0%, #0f1117 55%);
  color: var(--demo-text);
}

.demo-header {
  display: flex;
  flex-wrap: wrap;
  gap: 32px;
  padding: 32px clamp(20px, 4vw, 48px);
  align-items: center;
}

.demo-title {
  flex: 1;
  min-width: 280px;
}

.demo-title h1 {
  margin: 8px 0;
  font-size: clamp(28px, 4vw, 44px);
}

.eyebrow {
  text-transform: uppercase;
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--demo-muted);
  margin: 0;
}

.lede {
  max-width: 560px;
  margin: 12px 0 0 0;
  color: var(--demo-muted);
}

.demo-controls {
  display: flex;
  gap: 20px;
  align-items: flex-end;
  flex-wrap: wrap;
}

.control {
  display: flex;
  flex-direction: column;
  gap: 8px;
  color: var(--demo-muted);
}

.control select {
  min-width: 220px;
  padding: 10px 14px;
  border-radius: 10px;
  border: 1px solid var(--demo-border);
  background: rgba(255, 255, 255, 0.02);
  color: var(--demo-text);
}

.segmented {
  display: inline-flex;
  border: 1px solid var(--demo-border);
  border-radius: 999px;
  overflow: hidden;
}

.segmented button {
  background: transparent;
  color: var(--demo-muted);
  border: none;
  padding: 10px 22px;
  cursor: pointer;
  font-weight: 600;
  transition: background 0.2s ease;
}

.segmented button.active {
  background: rgba(255, 255, 255, 0.12);
  color: var(--demo-text);
}

.demo-main {
  display: grid;
  gap: 24px;
  padding: 0 clamp(20px, 4vw, 48px) 48px;
  grid-template-columns: minmax(240px, 25%) minmax(0, 1fr);
  align-items: start;
}

.panel {
  background: var(--demo-panel);
  border: 1px solid var(--demo-border);
  border-radius: 24px;
  padding: 24px;
  box-shadow: 0 25px 60px rgba(5, 8, 15, 0.5);
}

.panel-head {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: baseline;
  margin-bottom: 20px;
}

.panel h2 {
  margin: 6px 0 0 0;
}

.file-meta {
  text-align: right;
  font-variant-numeric: tabular-nums;
  color: var(--demo-muted);
}

.ramps {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.palette-picker {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 20px;
}

.palette-label {
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--demo-muted);
}

.palette-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(32px, 1fr));
  gap: 6px;
}

.palette-swatch {
  width: 100%;
  aspect-ratio: 1 / 1;
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  cursor: pointer;
  position: relative;
  transition: transform 0.15s ease;
}

.palette-swatch:hover {
  transform: translateY(-2px);
}

.palette-swatch.active {
  box-shadow: 0 0 0 2px var(--demo-text);
}

.ramp-row {
  display: grid;
  grid-template-columns: repeat(10, minmax(0, 1fr));
  gap: 6px;
  align-items: center;
}

.ramp-row strong {
  grid-column: span 2;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--demo-muted);
}

.ramp-row.active .swatch {
  box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.25);
}

.swatch {
  aspect-ratio: 1 / 1;
  border-radius: 12px;
  border: 1px solid rgba(0, 0, 0, 0.06);
  position: relative;
  overflow: hidden;
  background: var(--swatch, #ccc);
  display: flex;
  align-items: flex-end;
  justify-content: center;
  font-size: 10px;
  letter-spacing: 0.08em;
  color: rgba(0, 0, 0, 0.4);
}

.swatch.dark {
  color: rgba(255, 255, 255, 0.7);
}

.swatch span {
  padding-bottom: 8px;
}

.meta-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 12px;
}

.meta-card {
  padding: 14px 16px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--demo-border);
}

.meta-card .label {
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--demo-muted);
}

.meta-card .value {
  margin-top: 6px;
  font-size: 16px;
  font-variant-numeric: tabular-nums;
  display: flex;
  align-items: center;
  gap: 10px;
}

.meta-card .value code {
  background: rgba(0, 0, 0, 0.25);
  padding: 2px 6px;
  border-radius: 6px;
}

.meta-card .value .chip {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.phones-panel {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.phones {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 12px;
}

.device-block {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.device-title {
  font-weight: 600;
  color: var(--demo-muted);
  letter-spacing: 0.08em;
}

.device-frame {
  display: flex;
  justify-content: center;
  align-items: flex-start;
  padding: 0;
}

.device-shell {
  display: inline-flex;
  justify-content: center;
  align-items: flex-start;
  padding: 10px;
  border-radius: 42px;
  background: #0f0f0f;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.2);
}

.screen {
  width: 320px;
  height: 648px;
  border-radius: 32px;
  background: var(--bg);
  color: var(--text-primary);
  position: relative;
  overflow: hidden;
  transform: none;
}

@media (max-width: 1100px) {
  .screen {
    width: 300px;
    height: 608px;
  }
}

@media (max-width: 980px) {
  .demo-header {
    flex-direction: column;
    align-items: flex-start;
  }
  .demo-controls {
    width: 100%;
  }
  .segmented {
    width: 100%;
  }
  .segmented button {
    flex: 1;
  }
  .demo-main {
    grid-template-columns: 1fr;
  }
  .phones-panel {
    grid-column: auto;
  }
  .screen {
    width: 280px;
    height: 568px;
  }
}