:root {
  --primary: #247d8b;
  --primary-hover: #1e6b78;
  --primary-light: rgba(36, 125, 139, 0.12);
  --primary-light-strong: rgba(36, 125, 139, 0.2);
  --bg: #f0f4f8;
  --surface: #ffffff;
  --text: #1e293b;
  --muted: #64748b;
  --text-muted: #64748b;
  --border: #e2e8f0;
  --surface-soft: #f8fbfd;
  --surface-hover: #eef7fb;
  --surface-disabled: #eef2f7;
  --danger: #b91c1c;
  --shadow: 0 4px 20px rgba(36, 125, 139, 0.12);
  color-scheme: light;
}

html[data-theme="dark"] {
  --primary: #2b9db6;
  --primary-hover: #3db1cb;
  --primary-light: rgba(43, 157, 182, 0.16);
  --primary-light-strong: rgba(43, 157, 182, 0.24);
  --bg: #151b1e;
  --surface: #20282d;
  --text: #f2f5f6;
  --muted: #a6b0b7;
  --text-muted: #a6b0b7;
  --border: #2e3940;
  --surface-soft: #1a2226;
  --surface-hover: #1f2c31;
  --surface-disabled: #202a2f;
  --danger: #e2556c;
  --shadow: 0 16px 42px -30px rgba(0, 0, 0, 0.42);
  color-scheme: dark;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  color: var(--text);
  background: radial-gradient(circle at top right, var(--surface-hover), var(--bg) 55%);
}