:root {
  color-scheme: light dark;
  --bg: #f5f5f7;
  --card-bg: #ffffff;
  --text: #1c1c1e;
  --muted: #6e6e73;
  --accent: #0a84ff;
  --danger: #d70015;
  --border: #e5e5ea;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #000000;
    --card-bg: #1c1c1e;
    --text: #f5f5f7;
    --muted: #98989d;
    --border: #38383a;
  }
}

* { 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;
  padding: 24px;
}

.card {
  width: 100%;
  max-width: 420px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 32px;
}

h1 {
  font-size: 22px;
  margin: 0 0 12px;
}

.muted {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.5;
  margin: 0 0 24px;
}

input[type='email'] {
  width: 100%;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  font-size: 15px;
  margin-bottom: 12px;
}

.btn, button {
  display: inline-block;
  width: 100%;
  padding: 12px 14px;
  border-radius: 10px;
  border: none;
  background: var(--accent);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  text-align: center;
  text-decoration: none;
  box-sizing: border-box;
}

button:disabled { opacity: 0.5; cursor: default; }

.btn.danger, button.danger { background: var(--danger); }

.result {
  margin-top: 16px;
  font-size: 14px;
  line-height: 1.5;
}

.result.error { color: var(--danger); }