:root {
  --bg: #0f1115;
  --card: #1a1d24;
  --fg: #e7e9ee;
  --muted: #8a909c;
  --accent: #4f8cff;
  --error: #ff6b6b;
  --border: #2a2e38;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.5 system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
}

.card {
  width: 100%;
  max-width: 360px;
  padding: 2rem;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
}

.brand {
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--accent);
  margin-bottom: 1.5rem;
}

h1 { font-size: 1.25rem; margin: 0 0 1rem; }

label {
  display: block;
  margin-bottom: 1rem;
  font-size: 0.9rem;
  color: var(--muted);
}

input {
  width: 100%;
  margin-top: 0.35rem;
  padding: 0.6rem 0.7rem;
  background: #0f1115;
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--fg);
  font-size: 1rem;
}

button {
  width: 100%;
  padding: 0.65rem;
  background: var(--accent);
  border: none;
  border-radius: 8px;
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
}

button:hover { filter: brightness(1.08); }

.error {
  padding: 0.6rem 0.7rem;
  background: rgba(255, 107, 107, 0.12);
  border: 1px solid var(--error);
  border-radius: 8px;
  color: var(--error);
  font-size: 0.9rem;
}

.muted { color: var(--muted); font-size: 0.9rem; }