/* ===== DARK THEME (default) ===== */
:root, [data-theme="dark"] {
  --bg: #0b0f19;
  --bg2: #161c2d;
  --bg3: #1f2937;
  --accent: #3b82f6;
  --accent2: #8b5cf6;
  --green: #10b981;
  --yellow: #f59e0b;
  --red: #ef4444;
  --text: #e2e8f0;
  --text-strong: #ffffff;
  --muted: #94a3b8;
  --border: #2e374a;
  --shadow: 0 4px 20px rgba(0,0,0,0.4);
  --chart-grid: #2e374a;
  --chart-tick: #94a3b8;
  --chart-legend: #e2e8f0;
  --donut-border: #161c2d;
  --radius: 12px;
  --hover: rgba(255,255,255,0.06);
  --card: var(--bg2);
}

/* ===== LIGHT THEME ===== */
[data-theme="light"] {
  --bg: #f4f7fe;
  --bg2: #ffffff;
  --bg3: #f8fafc;
  --accent: #4318ff;
  --accent2: #868cff;
  --green: #05cd99;
  --yellow: #ffb547;
  --red: #ee5d50;
  --text: #2b3674;
  --text-strong: #1b2559;
  --muted: #a3aed1;
  --border: #e9edf7;
  --shadow: 0 10px 30px rgba(112, 144, 176, 0.12);
  --chart-grid: #e9edf7;
  --chart-tick: #a3aed1;
  --chart-legend: #2b3674;
  --donut-border: #ffffff;
  --hover: rgba(67, 24, 255, 0.04);
  --card: var(--bg2);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body { background: var(--bg); color: var(--text); font-family: 'Inter', system-ui, -apple-system, sans-serif; font-size: 14px; letter-spacing: 0; transition: background 0.3s ease, color 0.3s ease; }