:root {
  color-scheme: dark;
  --bg: #0f1420;
  --panel: #161d2e;
  --border: #2a3450;
  --text: #e6e9f2;
  --muted: #8b94ad;
  --accent: #4f7cff;
  --danger: #e5484d;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.5 -apple-system, Segoe UI, Roboto, sans-serif;
}
.login-card {
  width: min(380px, 92vw);
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 32px;
}
.login-card h1 { font-size: 18px; margin: 0 0 4px; }
.login-card p.sub { color: var(--muted); margin: 0 0 24px; font-size: 13px; }
label { display: block; font-size: 13px; color: var(--muted); margin: 14px 0 6px; }
input {
  width: 100%;
  padding: 10px 12px;
  background: #0d1220;
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 14px;
}
input:focus { outline: 2px solid var(--accent); border-color: var(--accent); }
button {
  width: 100%;
  margin-top: 22px;
  padding: 11px;
  border: none;
  border-radius: 8px;
  background: var(--accent);
  color: white;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
}
button:disabled { opacity: 0.6; cursor: default; }
.error {
  margin-top: 14px;
  padding: 10px 12px;
  border-radius: 8px;
  background: rgba(229, 72, 77, 0.12);
  border: 1px solid rgba(229, 72, 77, 0.4);
  color: #ff9a9d;
  font-size: 13px;
  display: none;
}
.error.show { display: block; }