:root { --bg-dark: #0a0a0a; --bg-glass: rgba(255, 255, 255, 0.03); --border-glass: rgba(255, 255, 255, 0.1); --text-main: #f0f0f0; }
body { margin: 0; background-color: var(--bg-dark); color: var(--text-main); font-family: sans-serif; overflow-x: hidden; }
.demo-panel { width: 80%; max-width: 800px; min-height: 400px; background: var(--bg-glass); border: 1px solid var(--border-glass); border-radius: 24px; display: flex; align-items: center; justify-content: center; position: relative; overflow: hidden; }
.replay-btn { position: absolute; bottom: 20px; right: 20px; background: rgba(255,255,255,0.1); border: 1px solid rgba(255,255,255,0.2); color: white; padding: 8px 16px; border-radius: 8px; cursor: pointer; }
.replay-btn:hover { background: rgba(255,255,255,0.2); }