/* Design tokens — light is the base, dark swaps the same roles. */
:root {
  color-scheme: light;
  --page: #f9f9f7;
  --surface: #fcfcfb;
  --ink: #0b0b0b;
  --ink2: #52514e;
  --muted: #898781;
  --grid: #e1e0d9;
  --axis: #c3c2b7;
  --border: rgba(11, 11, 11, 0.10);
  --accent: #2a78d6;
  --accent-down: #256abf;
  --accent-ink: #ffffff;
  --danger: #d03b3b;
  --good: #006300;
  --wash: rgba(42, 120, 214, 0.08);
  --shadow: 0 1px 2px rgba(11, 11, 11, 0.05), 0 8px 24px rgba(11, 11, 11, 0.06);
  --shadow-lg: 0 4px 12px rgba(11, 11, 11, 0.10), 0 24px 60px rgba(11, 11, 11, 0.14);
}
html[data-theme="dark"] {
  color-scheme: dark;
  --page: #0d0d0d;
  --surface: #1a1a19;
  --ink: #ffffff;
  --ink2: #c3c2b7;
  --muted: #898781;
  --grid: #2c2c2a;
  --axis: #383835;
  --border: rgba(255, 255, 255, 0.10);
  --accent: #3987e5;
  --accent-down: #5598e7;
  --accent-ink: #ffffff;
  --danger: #e66767;
  --good: #0ca30c;
  --wash: rgba(57, 135, 229, 0.14);
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 8px 24px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 4px 12px rgba(0, 0, 0, 0.5), 0 24px 60px rgba(0, 0, 0, 0.55);
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--page);
  color: var(--ink);
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 15px;
  line-height: 1.5;
}
h1, h2, h3 { margin: 0; font-weight: 600; }
button { font: inherit; cursor: pointer; }
a { color: var(--accent); }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--ink);
  border-radius: 10px;
  padding: 8px 14px;
  font-weight: 500;
  text-decoration: none;
  transition: background 0.15s, border-color 0.15s;
}
.btn:hover { background: var(--wash); }
.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-ink);
}
.btn-primary:hover { background: var(--accent-down); }
.btn-small { padding: 5px 12px; border-radius: 8px; font-size: 13.5px; }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: var(--shadow);
}