:root {
  --bg: #0d0d0d;
  --bg-card: #1a1a1a;
  --bg-card-hover: #222;
  --border: #2a2a2a;
  --text: #f0f0f0;
  --text-muted: #888;
  --accent: #4f8ef7;
  --accent-hover: #3a7ae0;
  --success: #22c55e;
  --warning: #f59e0b;
  --error: #ef4444;
  --font: 'Inter', system-ui, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body { font-family: var(--font); background: var(--bg); color: var(--text); min-height: 100vh; }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
}

.btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.6rem 1.2rem; border-radius: 8px; border: none;
  font-size: 0.9rem; font-weight: 500; cursor: pointer; transition: background 0.15s;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); }
.btn-ghost { background: transparent; color: var(--text-muted); border: 1px solid var(--border); }
.btn-ghost:hover { background: var(--bg-card-hover); color: var(--text); }

.badge {
  display: inline-block; padding: 0.2rem 0.6rem;
  border-radius: 999px; font-size: 0.75rem; font-weight: 600;
}
.badge-green { background: #166534; color: #86efac; }
.badge-yellow { background: #713f12; color: #fde68a; }
.badge-blue { background: #1e3a5f; color: #93c5fd; }
.badge-red { background: #7f1d1d; color: #fca5a5; }

.stat-card { text-align: center; }
.stat-card .value { font-size: 2rem; font-weight: 700; }
.stat-card .label { font-size: 0.8rem; color: var(--text-muted); margin-top: 0.25rem; }

.delta-up { color: var(--success); }
.delta-down { color: var(--error); }

@media (max-width: 768px) {
  .card { padding: 1rem; }
  .grid-3 { grid-template-columns: 1fr !important; }
}