:root {
  color-scheme: light;
  --bg: #f3f4f6;
  --card: #ffffff;
  --text: #111827;
  --muted: #6b7280;
  --accent: #111827;
  --accent-text: #ffffff;
  --error: #b91c1c;
  --border: #e5e7eb;
}

* {
  box-sizing: border-box;
}

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

.card {
  width: min(100% - 32px, 420px);
  background: var(--card);
  border-radius: 16px;
  padding: 28px 24px;
  box-shadow: 0 10px 30px rgba(17, 24, 39, 0.08);
}

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

.lead,
.hint {
  margin: 0 0 20px;
  color: var(--muted);
  line-height: 1.4;
}

.form {
  display: grid;
  gap: 10px;
}

label {
  font-size: 0.9rem;
}

input {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 1rem;
}

button {
  margin-top: 6px;
  padding: 12px 14px;
  border: 0;
  border-radius: 10px;
  background: var(--accent);
  color: var(--accent-text);
  font-size: 1rem;
  cursor: pointer;
}

button:disabled {
  opacity: 0.6;
  cursor: wait;
}

button.secondary {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}

.error {
  color: var(--error);
  margin: 0 0 16px;
}

[hidden] {
  display: none !important;
}