:root {
  --bg: #0f1115;
  --panel: #171a21;
  --border: #2a2e38;
  --text: #e6e8ec;
  --muted: #9aa1ac;
  --accent: #4f8cff;
  --danger: #ff6b6b;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, "Yu Gothic UI", "Hiragino Sans", sans-serif;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 32px;
  width: min(360px, 90vw);
}

h1 {
  font-size: 1.2rem;
  margin: 0 0 20px;
  color: var(--text);
}

input {
  width: 100%;
  padding: 10px 12px;
  margin-bottom: 12px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-size: 0.95rem;
}

button {
  width: 100%;
  padding: 10px;
  background: var(--accent);
  border: none;
  border-radius: 6px;
  color: #fff;
  font-size: 0.95rem;
  cursor: pointer;
}

button:hover { opacity: 0.9; }

.error {
  color: var(--danger);
  font-size: 0.85rem;
  min-height: 1.2em;
  margin-bottom: 8px;
}

.muted { color: var(--muted); font-size: 0.85rem; }