:root {
  color-scheme: light dark;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.5;
  --background: #f4f5f7;
  --surface: #ffffff;
  --text: #24282f;
  --muted: #626975;
  --border: #cbd0d8;
  --accent: #314c84;
  --error: #a12c32;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
  background: var(--background);
  color: var(--text);
}
main {
  width: 100%;
  max-width: 420px;
  padding: 32px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--surface);
}
.eyebrow { margin: 0 0 12px; color: var(--muted); font-size: 12px; font-weight: 700; letter-spacing: .12em; }
h1 { margin: 0; font-size: 27px; line-height: 1.2; letter-spacing: -.025em; }
.intro { margin: 14px 0 26px; color: var(--muted); }
form { display: grid; gap: 8px; margin-top: 24px; }
label { margin-top: 10px; font-size: 14px; font-weight: 600; }
input {
  min-width: 0;
  width: 100%;
  min-height: 48px;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  background: var(--surface);
  color: var(--text);
  font: inherit;
}
input:focus-visible, button:focus-visible, a:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; }
button {
  min-height: 48px;
  margin-top: 20px;
  border: 0;
  border-radius: 8px;
  padding: 12px;
  color: #ffffff;
  background: var(--accent);
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}
button:hover { filter: brightness(1.1); }
a { display: inline-block; margin-top: 20px; color: var(--accent); }
.error { margin: 20px 0 0; color: var(--error); font-size: 14px; }
@media (prefers-color-scheme: dark) {
  :root {
    --background: #14171c;
    --surface: #1e2229;
    --text: #eceef2;
    --muted: #afb6c2;
    --border: #48515f;
    --accent: #526fac;
    --error: #ffa5a9;
  }
  a { color: #a9c0ef; }
}
@media (max-width: 420px) {
  body { padding: 16px; }
  main { padding: 26px 22px; }
  h1 { font-size: 25px; }
}