:root {
  color-scheme: light dark;
  --bg: #f5f6f8;
  --card-bg: #ffffff;
  --text: #1a1a1a;
  --muted: #6b7280;
  --border: #e2e4e8;
  --accent: #2563eb;
  --accent-text: #ffffff;
  --error: #dc2626;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1115;
    --card-bg: #1a1d23;
    --text: #f2f3f5;
    --muted: #9aa0aa;
    --border: #2a2e37;
    --accent: #3b82f6;
    --accent-text: #ffffff;
    --error: #f87171;
  }
}

* {
  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-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

.auth-card,
.page {
  width: 100%;
  max-width: 360px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 32px;
  text-align: center;
}

h1 {
  margin: 0 0 8px;
  font-size: 1.4rem;
}

.hint {
  margin: 0 0 20px;
  color: var(--muted);
  font-size: 0.85rem;
}

form {
  display: flex;
  flex-direction: column;
  gap: 12px;
  text-align: left;
}

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

input {
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  font-size: 1rem;
}

input:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

button {
  margin-top: 4px;
  padding: 10px 12px;
  border: none;
  border-radius: 8px;
  background: var(--accent);
  color: var(--accent-text);
  font-size: 1rem;
  cursor: pointer;
}

button:hover {
  filter: brightness(1.05);
}

.error {
  margin-top: 16px;
  color: var(--error);
  font-size: 0.85rem;
}

a {
  color: var(--accent);
}