:root {
  --canvas: #070810;
  --surface: #101325;
  --surface-strong: #151a31;
  --ink: #ecf3ff;
  --ink-soft: #9ea9d2;
  --line: #2a3155;
  --accent: #77f7cf;
  --accent-warm: #f6ad76;
  --brand: #76a7ff;
  --danger: #ff6e81;
  --radius: 14px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  min-height: 100vh;
  padding: 22px;
  color: var(--ink);
  line-height: 1.5;
  font-family: Sora, Manrope, 'Segoe UI', sans-serif;
  background: linear-gradient(170deg, #05060d 0%, #090b18 42%, #06070f 100%);
}

.backdrop {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -1;
  background:
    radial-gradient(circle at 8% 8%, rgba(118, 167, 255, 0.14), transparent 35%),
    radial-gradient(circle at 92% 4%, rgba(119, 247, 207, 0.12), transparent 35%),
    radial-gradient(circle at 76% 84%, rgba(246, 173, 118, 0.12), transparent 30%);
}

.container {
  width: min(1200px, 100%);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

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

.full-span,
.hero,
.scene-nav {
  grid-column: 1 / -1;
}

.card {
  background: linear-gradient(170deg, rgba(21, 26, 49, 0.94), rgba(16, 19, 37, 0.94));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

.card--danger {
  border-color: var(--danger, #ef4444);
}

.btn--danger {
  background: var(--danger, #ef4444);
  border-color: var(--danger, #ef4444);
  color: #ffffff;
}

.hero {
  gap: 14px;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  font-size: 0.72rem;
  font-weight: 700;
}

h1 {
  font-size: clamp(2rem, 4vw, 3.2rem);
  letter-spacing: -0.03em;
  line-height: 1.08;
}

h2 {
  font-size: 1.06rem;
  letter-spacing: 0.01em;
}

.subtitle,
.scene-copy,
.scene-hint,
.hearing-note,
.signal-caption {
  color: var(--ink-soft);
}

.hero-cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

code {
  font-family: 'IBM Plex Mono', 'JetBrains Mono', monospace;
  background: rgba(8, 10, 18, 0.9);
  border: 1px solid #2d355f;
  border-radius: 10px;
  padding: 10px 12px;
}

.link-button,
button {
  border: 1px solid var(--line);
  background: #1a2040;
  color: var(--ink);
  padding: 10px 12px;
  border-radius: 10px;
  font-family: inherit;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  min-height: 44px;
  transition:
    transform 120ms ease,
    filter 120ms ease,
    border-color 120ms ease;
}

.link-button:hover,
button:hover {
  transform: translateY(-1px);
  filter: brightness(1.08);
}

.link-button:active,
button:active {
  transform: translateY(0);
}

.primary {
  background: linear-gradient(120deg, #7e9bff, #65a7ff);
  border-color: #9cb6ff;
  color: #040710;
}

.ghost {
  background: rgba(26, 32, 64, 0.7);
}

.warning {
  background: rgba(246, 173, 118, 0.16);
  border-color: var(--accent-warm);
  color: #ffd8b4;
}

.danger {
  background: rgba(255, 110, 129, 0.16);
  border-color: var(--danger);
  color: #ffbac5;
}

button:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.gate-card {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 14px;
  align-items: center;
}

.gate-controls {
  display: flex;
  flex-direction: column;
  gap: 8px;
  align-items: flex-end;
}

.status-pill {
  border: 1px solid #3a446f;
  border-radius: 999px;
  padding: 6px 10px;
  font-size: 0.82rem;
  color: #a6b3e0;
  background: rgba(13, 16, 31, 0.9);
}

.status-pill.is-ready {
  border-color: #2f7b66;
  color: #8ff3d2;
}

.scene-nav {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 12px;
  align-items: center;
}

.scene-indicator {
  font-weight: 700;
}

.mode-pill {
  display: inline-flex;
  margin-top: 6px;
  border: 1px solid #3a446f;
  border-radius: 999px;
  padding: 4px 9px;
  font-size: 0.76rem;
  color: #a6b3e0;
  background: rgba(13, 16, 31, 0.9);
}

.mode-pill.is-hosted {
  border-color: #7f5f2c;
  color: #ffd9ad;
}

.mode-pill.is-local {
  border-color: #2f7b66;
  color: #8ff3d2;
}

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

.chip {
  font-size: 0.78rem;
  border-radius: 999px;
  padding: 7px 10px;
}

.chip.is-active,
.chip[aria-current='true'] {
  border-color: #87f5d0;
  background: rgba(119, 247, 207, 0.18);
}

.sound-switch {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--ink-soft);
  font-size: 0.88rem;
}

.toggle-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.switch {
  position: relative;
  width: 52px;
  height: 28px;
  display: inline-block;
}

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.switch input:focus-visible + .slider {
  outline: 2px solid #84a9ff;
  outline-offset: 2px;
}

.slider {
  position: absolute;
  inset: 0;
  border-radius: 999px;
  background: #323d67;
  transition: 0.25s;
}

.slider:before {
  content: '';
  position: absolute;
  width: 20px;
  height: 20px;
  left: 4px;
  top: 4px;
  border-radius: 50%;
  background: #f5f8ff;
  transition: 0.25s;
}

input:checked + .slider {
  background: linear-gradient(130deg, #7f9dff, #77f7cf);
}

input:checked + .slider:before {
  transform: translateX(24px);
}

.controls-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 10px;
}

.preset-row {
  display: grid;
  grid-template-columns: repeat(4, minmax(90px, 1fr));
  gap: 8px;
}

.sliders {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.slider-row {
  display: grid;
  grid-template-columns: 130px 1fr 56px;
  gap: 10px;
  align-items: center;
}

.slider-row span {
  font-size: 0.9rem;
  color: var(--ink-soft);
}

.slider-row input[type='range'] {
  accent-color: var(--brand);
  width: 100%;
}

.slider-row output,
.state-display,
.log-container,
.signal-caption {
  font-family: 'IBM Plex Mono', 'JetBrains Mono', monospace;
}

.slider-row output {
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.signal-canvas {
  width: 100%;
  height: 180px;
  border-radius: 10px;
  border: 1px solid #2b3358;
  background: #080b18;
}

.state-display {
  min-height: 220px;
  border-radius: 10px;
  border: 1px solid #2a3153;
  background: #070a14;
  color: #93b9ff;
  padding: 14px;
  font-size: 0.85rem;
  white-space: pre-wrap;
  overflow-x: auto;
}

.log-container {
  border-radius: 10px;
  border: 1px solid #2a3153;
  max-height: 320px;
  overflow-y: auto;
}

.log-entry {
  display: grid;
  grid-template-columns: 80px auto 1fr;
  gap: 8px;
  align-items: center;
  font-size: 0.84rem;
  border-bottom: 1px solid rgba(50, 63, 101, 0.8);
  padding: 8px 10px;
  animation: fadeIn 160ms ease;
}

.log-entry:last-child {
  border-bottom: none;
}

.timestamp {
  font-size: 0.74rem;
  color: #8e9ccb;
}

.badge {
  border-radius: 999px;
  padding: 3px 8px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-size: 0.65rem;
  font-weight: 700;
}

.badge.update {
  background: rgba(118, 167, 255, 0.22);
  color: #b6ceff;
}

.badge.add {
  background: rgba(119, 247, 207, 0.22);
  color: #98f7db;
}

.badge.remove {
  background: rgba(255, 110, 129, 0.2);
  color: #ffc0cb;
}

.docs-links {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.docs-links a {
  color: #c6d4ff;
  border: 1px solid #3c4777;
  background: rgba(18, 23, 44, 0.9);
  padding: 9px 12px;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  border-radius: 10px;
  text-decoration: none;
}

.docs-links a:hover {
  border-color: #8bacff;
}

.api-docs-shell {
  gap: 14px;
}

.api-docs-grid {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.api-block {
  border: 1px solid #2d355f;
  border-radius: 12px;
  background: rgba(9, 12, 24, 0.9);
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.api-label {
  font-size: 0.8rem;
  color: var(--ink-soft);
  font-weight: 600;
}

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

.api-table-wrap {
  overflow-x: auto;
}

.api-table {
  width: 100%;
  min-width: 680px;
  border-collapse: collapse;
}

.api-table th,
.api-table td {
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid #2b3358;
  padding: 9px 8px;
  font-size: 0.87rem;
}

.api-table th {
  color: #cfddff;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.api-block pre {
  border-radius: 10px;
  border: 1px solid #2a3153;
  background: #070a14;
  color: #c0d5ff;
  padding: 12px;
  overflow-x: auto;
  white-space: pre;
}

.api-block pre code {
  border: 0;
  background: transparent;
  padding: 0;
}

.api-callout {
  border-left: 3px solid var(--accent);
  padding: 10px 12px;
  background: rgba(16, 24, 42, 0.85);
  color: var(--ink-soft);
}

.scene {
  animation: sceneEnter 220ms ease;
}

.is-hidden {
  display: none;
}

button:focus-visible,
.link-button:focus-visible,
.docs-links a:focus-visible {
  outline: 2px solid #84a9ff;
  outline-offset: 2px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@keyframes sceneEnter {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@media (max-width: 900px) {
  .scene-nav,
  .gate-card {
    grid-template-columns: 1fr;
  }

  .gate-controls {
    align-items: flex-start;
  }

  .scene-nav {
    text-align: center;
  }
}

@media (max-width: 760px) {
  body {
    padding: 12px;
  }

  .slider-row {
    grid-template-columns: 1fr;
    gap: 5px;
  }

  .slider-row output {
    text-align: left;
  }

  .preset-row {
    grid-template-columns: repeat(2, minmax(90px, 1fr));
  }

  .log-entry {
    grid-template-columns: 1fr;
  }

  .api-two-col {
    grid-template-columns: 1fr;
  }

  .api-block {
    padding: 10px;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation: none;
    transition: none;
  }
}