* { margin: 0; padding: 0; box-sizing: border-box; }
:root {
    --bg: #0d1117;
    --surface: #161b22;
    --border: #30363d;
    --text: #e6edf3;
    --text-muted: #8b949e;
    --accent: #00d4ff;
    --accent-hover: #33ddff;
    --danger: #f85149;
    --success: #3fb950;
    --warning: #d29922;
    --radius: 8px;
}
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif; background: var(--bg); color: var(--text); min-height: 100vh; }
#app { display: flex; min-height: 100vh; }
.sidebar { width: 220px; background: var(--surface); border-right: 1px solid var(--border); padding: 16px 0; position: fixed; height: 100vh; overflow-y: auto; }
.logo { padding: 0 16px 16px; font-size: 18px; font-weight: 700; border-bottom: 1px solid var(--border); }
.nav-links { list-style: none; padding: 12px 0; }
.nav-links a { display: block; padding: 10px 16px; color: var(--text-muted); text-decoration: none; font-size: 14px; transition: all 0.15s; }
.nav-links a:hover, .nav-links a.active { color: var(--text); background: rgba(0,212,255,0.1); border-right: 2px solid var(--accent); }
.content { flex: 1; margin-left: 220px; padding: 24px; }
.panel { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; margin-bottom: 16px; }
.panel h2 { margin-bottom: 16px; font-size: 20px; }
/* Mobile */
@media (max-width: 768px) {
    .sidebar { width: 100%; height: auto; position: relative; display: flex; flex-wrap: wrap; padding: 8px 0; }
    .logo { width: 100%; padding: 8px 16px; border-bottom: none; }
    .nav-links { display: flex; width: 100%; padding: 0; overflow-x: auto; }
    .nav-links a { padding: 8px 14px; white-space: nowrap; border-right: none; border-bottom: 2px solid transparent; }
    .nav-links a.active { border-right: none; border-bottom-color: var(--accent); }
    .content { margin-left: 0; padding: 12px; }
}