:root {
  --bg: #080b12;
  --panel: #101727;
  --panel-2: #0d1320;
  --text: #e7ecff;
  --muted: #b4bfdc;
  --accent: #6d86ff;
  --border: #263150;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  color: var(--text);
  background: radial-gradient(circle at 10% 15%, #16213f 0%, transparent 32%),
    radial-gradient(circle at 85% 80%, #1d1537 0%, transparent 35%),
    linear-gradient(160deg, #070a12 0%, #090e18 55%, #06070d 100%);
}

.layout {
  max-width: 1080px;
  margin: 0 auto;
  padding: 24px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.site-footer {
  max-width: 1080px;
  margin: 0 auto 28px;
  padding: 0 24px;
  color: var(--muted);
  font-size: 0.9rem;
  text-align: center;
}

.panel {
  background: linear-gradient(180deg, var(--panel) 0%, var(--panel-2) 100%);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: clamp(18px, 3vw, 28px);
  box-shadow: 0 14px 34px rgba(0, 0, 0, 0.35);
}

.eyebrow {
  margin: 0;
  color: var(--muted);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-size: 0.8rem;
}

h1 {
  margin: 10px 0 14px;
  font-size: clamp(1.6rem, 5vw, 2.6rem);
}

.definition {
  margin: 0;
  color: #d3dcfa;
  line-height: 1.65;
}

.viewer-panel {
  padding: 14px;
}

.scene {
  width: 100%;
  aspect-ratio: 16 / 9;
  min-height: 300px;
  border-radius: 12px;
  border: 1px solid #2e3c66;
  overflow: hidden;
  background: #060912;
}

.hint {
  margin: 10px 4px 2px;
  color: var(--muted);
  font-size: 0.9rem;
}

@media (max-width: 640px) {
  .layout {
    padding: 14px;
    gap: 12px;
  }

  .panel {
    border-radius: 12px;
    padding: 14px;
  }

  h1 {
    margin: 8px 0 12px;
    font-size: 1.55rem;
    line-height: 1.15;
  }

  .definition {
    font-size: 0.96rem;
    line-height: 1.55;
  }

  .viewer-panel {
    padding: 10px;
  }

  .scene {
    min-height: 220px;
    aspect-ratio: 4 / 3;
    border-radius: 10px;
  }

  .hint {
    margin: 8px 2px 0;
    font-size: 0.84rem;
    line-height: 1.4;
  }

  .site-footer {
    margin: 0 auto 18px;
    padding: 0 14px;
    font-size: 0.82rem;
  }
}