:root {
  --bg: #f6f4f1;
  --card: #ffffff;
  --ink: #1d1a17;
  --muted: #6f6861;
  --line: #e4ded7;
  --accent: #e2574c;
  --accent-ink: #ffffff;
  --err-bg: #fdecea;
  --err-ink: #a3261c;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #161412;
    --card: #211e1b;
    --ink: #f3efea;
    --muted: #a59d95;
    --line: #36312c;
    --err-bg: #3a1d1a;
    --err-ink: #ffb4ab;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100svh;
  display: grid;
  place-items: center;
  padding: 16px;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.5 'Plus Jakarta Sans', system-ui, sans-serif;
}
.card {
  width: 100%;
  max-width: 380px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 32px 28px;
}
h1 { margin: 0; font-size: 26px; }
.sub { margin: 2px 0 24px; color: var(--muted); }
label { display: block; font-weight: 600; font-size: 14px; margin-bottom: 16px; }
input {
  display: block;
  width: 100%;
  margin-top: 6px;
  height: 48px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--bg);
  color: var(--ink);
  font: inherit;
}
input:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
button {
  width: 100%;
  height: 48px;
  margin-top: 8px;
  border: 0;
  border-radius: 10px;
  background: var(--accent);
  color: var(--accent-ink);
  font: 700 16px 'Plus Jakarta Sans', system-ui, sans-serif;
  cursor: pointer;
}
.err {
  background: var(--err-bg);
  color: var(--err-ink);
  border-radius: 10px;
  padding: 10px 14px;
  font-size: 14px;
}