:root {
  --ink: #1d2a3a;
  --muted: #5a6a7e;
  --line: #dde5ee;
  --soft: #eef3f8;
  --accent: #2f5d8a;
  --brand: #fb4d38;
  --accent-ink: #fff;
  --bg: #f8fafc;
  --card: #fff;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --ink: #e6edf5;
    --muted: #9aaabd;
    --line: #2c3a4a;
    --soft: #1d2835;
    --accent: #6a9ccf;
    --brand: #ff5f4b;
    --accent-ink: #0d1722;
    --bg: #121a24;
    --card: #18222e;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 14px/1.45 ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
h1, h2, h3 { margin: 0; letter-spacing: -0.01em; }
.label { font-size: 12px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); margin: 0 0 8px; }
.field { margin: 0 0 18px; }

/* Segmented radio groups: a pill-shaped tab bar, the chosen option a raised white pill */
.seg { display: flex; gap: 2px; padding: 4px; border-radius: 999px; background: var(--soft);
  box-shadow: inset 0 1px 2px rgba(20, 30, 45, .06); }
.seg label { flex: 1; min-width: 0; }
.seg input { position: absolute; opacity: 0; pointer-events: none; }
.seg span {
  display: block; text-align: center; padding: 8px 10px; border-radius: 999px; cursor: pointer;
  font-weight: 600; color: var(--muted); transition: background .15s, color .15s, box-shadow .15s;
}
.seg span:hover { color: var(--ink); }
.seg input:checked + span { background: var(--card); color: var(--ink); box-shadow: 0 1px 3px rgba(20, 30, 45, .16), 0 0 0 1px rgba(20, 30, 45, .04); }
.seg input:focus-visible + span { outline: 3px solid #e9a93a; outline-offset: 1px; }
.seg small { display: block; font-weight: 400; color: var(--muted); font-size: 12px; }

.btn {
  appearance: none; border: 0; border-radius: 10px; padding: 10px 14px; font: inherit; font-weight: 600;
  cursor: pointer; background: var(--soft); color: var(--ink);
}
.btn.primary { background: var(--accent); color: var(--accent-ink); }
.btn:focus-visible { outline: 3px solid #e9a93a; outline-offset: 2px; }