:root {
  --bg: #f4f6fb;
  --card: #ffffff;
  --primary: #1d4ed8;
  --primary-dark: #1e3a8a;
  --text: #111827;
  --muted: #6b7280;
  --border: #e5e7eb;
  --error-bg: #fee2e2;
  --error-fg: #991b1b;
  --success-bg: #d1fae5;
  --success-fg: #065f46;
  --danger: #dc2626;
}

* { box-sizing: border-box; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.card {
  background: var(--card);
  border-radius: 12px;
  padding: 32px;
  max-width: 420px;
  width: 100%;
  box-shadow: 0 4px 24px rgba(0,0,0,0.06);
}

h1 { margin: 0 0 4px; font-size: 22px; }
.subtitle { color: var(--muted); margin: 0 0 24px; }
.hint { color: var(--muted); font-size: 13px; margin-top: 16px; }

label {
  display: block;
  margin-bottom: 16px;
  font-size: 14px;
  font-weight: 500;
}

input[type="text"] {
  display: block;
  width: 100%;
  margin-top: 6px;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 15px;
  font-family: inherit;
}

input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(29,78,216,0.15);
}

button {
  width: 100%;
  padding: 11px 16px;
  background: var(--primary);
  color: white;
  border: none;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  margin-top: 8px;
}
button:hover { background: var(--primary-dark); }
button.danger { background: var(--danger); }

.alert {
  padding: 10px 12px;
  border-radius: 8px;
  margin-bottom: 16px;
  font-size: 14px;
}
.alert-error   { background: var(--error-bg);   color: var(--error-fg); }
.alert-success { background: var(--success-bg); color: var(--success-fg); }

.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.05em;
  margin-bottom: 12px;
}
.badge-success { background: var(--success-bg); color: var(--success-fg); }

dl.info {
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: 6px 16px;
  margin: 16px 0;
  font-size: 14px;
}
dl.info dt { color: var(--muted); }
dl.info dd { margin: 0; font-weight: 500; }

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }