:root {
  --bg: #0f1115;
  --panel: #16191f;
  --border: #2a303b;
  --text: #e8eaef;
  --muted: #8b93a3;
  --accent: #3390ec;
  --accent-hover: #4a9ff0;
  --danger: #ff8a8a;
  color-scheme: dark;
}
* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body {
  display: grid;
  place-items: center;
  padding: 16px;
  background: radial-gradient(circle at 50% 30%, #1b2030 0%, transparent 60%), var(--bg);
  color: var(--text);
  font: 14px/1.45 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Inter", sans-serif;
}
.card {
  width: 100%;
  max-width: 380px;
  padding: 28px;
  border-radius: 16px;
  background: var(--panel);
  border: 1px solid var(--border);
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.45);
}
form { display: flex; flex-direction: column; gap: 14px; }
.field { display: flex; flex-direction: column; gap: 6px; }
.field span { color: var(--muted); font-size: 12px; font-weight: 500; }
input {
  height: 40px; padding: 0 12px; border-radius: 9px;
  border: 1px solid var(--border); background: var(--bg); color: var(--text);
  font: inherit; outline: none;
}
input:focus { border-color: var(--accent); }
.btn-primary {
  height: 42px; margin-top: 4px; border: 0; border-radius: 10px;
  background: var(--accent); color: #fff; font: inherit; font-weight: 600; cursor: pointer;
}
.btn-primary:hover:not(:disabled) { background: var(--accent-hover); }
.btn-primary:disabled { opacity: 0.6; cursor: progress; }
.btn-primary:focus-visible, input:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.error { margin: 0; padding: 8px 10px; border-radius: 8px; background: rgba(255, 90, 90, 0.1); color: var(--danger); font-size: 13px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
[hidden] { display: none !important; }