:root {
  color-scheme: dark;
  --bg: linear-gradient(135deg, #0F172A 0%, #1E293B 100%);
  --panel: rgba(30, 41, 59, 0.9);
  --panel-strong: #1E293B;
  --text: #F8FAFC;
  --muted: #94A3B8;
  --accent: #3B82F6;
  --accent-2: #06B6D4;
  --accent-3: #8B5CF6;
  --success: #10B981;
  --warning: #F59E0B;
  --danger: #EF4444;
  --border: #334155;
  --shadow: 0 20px 45px rgba(2, 6, 23, 0.35);
}

* {
  box-sizing: border-box;
}

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

#main {
  max-width: 1400px;
  margin: 0 auto;
  padding: 24px;
}

.hero {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 16px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.hero h1 {
  margin: 8px 0 0;
  font-size: clamp(2rem, 4vw, 2.8rem);
  letter-spacing: -0.03em;
}

.hero p {
  margin: 10px 0 0;
  max-width: 680px;
  color: var(--muted);
  line-height: 1.6;
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 7px 12px;
  border-radius: 999px;
  background: rgba(6, 182, 212, 0.16);
  color: #a5f3fc;
  border: 1px solid rgba(6, 182, 212, 0.3);
  font-size: 0.9rem;
  font-weight: 600;
}

.hero-meta {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.pill {
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(59, 130, 246, 0.12);
  color: #e2e8f0;
  border: 1px solid rgba(59, 130, 246, 0.24);
  font-size: 0.9rem;
}

#draw_area {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 240px;
  gap: 20px;
  align-items: start;
}

.canvas-shell {
  padding: 16px;
  border-radius: 24px;
  border: 1px solid var(--border);
  background: var(--panel);
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
}

canvas {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  border-radius: 16px;
  border: 1px solid var(--border);
  background: #0F172A;
  transform: scaleX(-1);
}

video {
  display: none;
}

.controls {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.status-card,
.info-grid article {
  padding: 16px;
  border-radius: 18px;
  background: var(--panel);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.status-card h2 {
  margin: 0 0 8px;
  font-size: 1rem;
}

.status-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.55;
}

.status-dot {
  width: 12px;
  height: 12px;
  margin-top: 10px;
  border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 0 6px rgba(16, 185, 129, 0.16);
}

button {
  font-family: inherit;
  border: none;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, filter 0.2s ease;
}

.side_button {
  padding: 12px 14px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--accent), var(--accent-3));
  color: white;
  font-weight: 600;
  box-shadow: 0 10px 24px rgba(59, 130, 246, 0.24);
}

.side_button:hover {
  transform: translateY(-2px);
  filter: brightness(1.06);
}

.side_button:active {
  transform: translateY(0);
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 20px;
}

.info-grid h3 {
  margin: 0 0 6px;
  font-size: 1rem;
}

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

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

  .controls {
    flex-direction: row;
    flex-wrap: wrap;
  }

  .controls > * {
    flex: 1 1 220px;
  }

  .info-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  #main {
    padding: 16px;
  }

  .hero {
    align-items: flex-start;
  }

  .controls {
    flex-direction: column;
  }
}