:root {
  color-scheme: light;
  --page: #f9f9f7;
  --surface: #fcfcfb;
  --ink: #0b0b0b;
  --ink-2: #52514e;
  --muted: #898781;
  --border: rgba(11, 11, 11, 0.10);
  --accent: #2a78d6;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --page: #0d0d0d;
    --surface: #1a1a19;
    --ink: #f0efec;
    --ink-2: #c3c2b7;
    --border: rgba(255, 255, 255, 0.10);
    --accent: #3987e5;
  }
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --page: #0d0d0d;
  --surface: #1a1a19;
  --ink: #f0efec;
  --ink-2: #c3c2b7;
  --border: rgba(255, 255, 255, 0.10);
  --accent: #3987e5;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px 16px;
  background: var(--page);
  color: var(--ink);
  font: 16px/1.5 var(--font);
}
.card {
  width: 100%;
  max-width: 420px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 28px 22px;
  text-align: center;
}
.card img { width: 56px; height: 56px; }
h1 { font-size: 21px; margin: 14px 0 6px; letter-spacing: -0.01em; }
p { margin: 0 0 10px; color: var(--ink-2); font-size: 15px; }
.who { font-size: 13.5px; color: var(--muted); margin-top: 14px; }
.btn {
  display: inline-block;
  margin-top: 14px;
  padding: 11px 18px;
  border-radius: 12px;
  background: var(--accent);
  color: #fff;
  text-decoration: none;
  font-weight: 600;
  font-size: 15px;
}
.link { color: var(--accent); font-weight: 550; text-decoration: none; }