:root {
  color-scheme: dark;
  --bg: #0b1020;
  --surface: #11182b;
  --line: rgba(148, 163, 184, .28);
  --text: #ecf3ff;
  --muted: #a8b7d0;
  --accent: #8ba7ff;
  --accent-strong: #6f8ff5;
  --danger: #ffaaa4;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 20px;
  background: radial-gradient(circle at 20% 0%, #17254a 0, transparent 34rem), var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
.card {
  width: min(420px, 100%);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 28px;
  background: rgba(17, 24, 43, .92);
  box-shadow: 0 24px 70px rgba(0, 0, 0, .42);
}
.eyebrow { margin: 0 0 8px; color: var(--accent); font-size: 11px; font-weight: 800; letter-spacing: .18em; }
h1 { margin: 0; font-size: 28px; letter-spacing: -.04em; }
p { margin: 10px 0 24px; color: var(--muted); line-height: 1.6; }
label { display: grid; gap: 8px; color: var(--text); font-size: 13px; font-weight: 700; }
input {
  width: 100%;
  min-height: 46px;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px 12px;
  background: #0d1528;
  color: var(--text);
  font: inherit;
}
input:focus { outline: 0; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(139, 167, 255, .18); }
button {
  width: 100%;
  min-height: 46px;
  margin-top: 18px;
  border: 0;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  color: #081020;
  font: inherit;
  font-weight: 800;
  cursor: pointer;
}
button:hover { filter: brightness(1.08); }
.error { min-height: 22px; margin-top: 12px; color: var(--danger); font-size: 13px; font-weight: 700; }