:root {
  color-scheme: dark light;
  --bg: #020617;
  --text: #e5e7eb;
  --muted: #9ca3af;
  --accent: #22c55e;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(circle at top, #0b1120, #020617 55%);
  font-family: system-ui, sans-serif;
  color: var(--text);
}

.card {
  max-width: 360px;
  padding: 28px;
  background: linear-gradient(to bottom right, #0f172a, #020617);
  border-radius: 16px;
  border: 1px solid #1e293b;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

h1 { font-size: 18px; margin: 0 0 8px; font-weight: 600; }

.sub { font-size: 13px; color: var(--muted); margin-bottom: 20px; }

label { display: block; font-size: 13px; margin-bottom: 6px; color: var(--muted); }

input[type="password"] {
  width: 100%;
  padding: 10px 14px;
  border-radius: 8px;
  border: 1px solid #334155;
  background: #0f172a;
  color: var(--text);
  font-size: 15px;
}

input:focus { outline: none; border-color: var(--accent); }

.btn {
  width: 100%;
  margin-top: 16px;
  padding: 10px 14px;
  border-radius: 8px;
  border: none;
  background: #22c55e;
  color: #052e16;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
}

.btn:hover { background: #16a34a; }

.error { font-size: 13px; color: #fca5a5; margin-top: 10px; }