frontend/src/index.css

:root {
  --bg-primary: #0d1117;
  --bg-secondary: #161b22;
  --bg-tertiary: #21262d;
  --border: #30363d;
  --text-primary: #c9d1d9;
  --text-secondary: #8b949e;
  --accent: #58a6ff;
  --accent-hover: #79c0ff;
  --danger: #f85149;
  --success: #3fb950;
  --warning: #d29922;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif; background: var(--bg-primary); color: var(--text-primary); overflow: hidden; }
#root { height: 100vh; }
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--bg-secondary); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: #484f58; }
button { cursor: pointer; border: none; background: none; color: inherit; font-family: inherit; }
input, select, textarea { background: var(--bg-tertiary); border: 1px solid var(--border); color: var(--text-primary); padding: 6px 10px; border-radius: 6px; font-family: inherit; outline: none; transition: border 0.2s; }
input:focus, select:focus, textarea:focus { border-color: var(--accent); }
.spin { animation: spin 1s linear infinite; }
@keyframes spin { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }