:root {
  --bg: #f4f6f8;
  --text: #1a2332;
  --muted: #5c6778;
  --brand: #2d6a6a;
  --alert: #8b3a3a;
  --card: #fff;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

header {
  padding: 1.25rem 1.5rem;
  background: var(--card);
  border-bottom: 1px solid #dde3ea;
}

header h1 {
  margin: 0;
  font-size: 1.25rem;
  color: var(--brand);
}

.muted {
  color: var(--muted);
  font-size: 0.9rem;
}

main {
  max-width: 640px;
  margin: 0 auto;
  padding: 1.5rem;
}

section {
  background: var(--card);
  border-radius: 12px;
  padding: 1.25rem;
  margin-bottom: 1rem;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
}

label {
  display: block;
  margin: 0.75rem 0 0.25rem;
  font-size: 0.85rem;
}

input {
  width: 100%;
  padding: 0.5rem 0.65rem;
  border: 1px solid #ccd4de;
  border-radius: 8px;
}

button,
.button-link {
  margin-top: 0.75rem;
  padding: 0.55rem 1rem;
  border: none;
  border-radius: 8px;
  background: var(--brand);
  color: #fff;
  font-size: 0.95rem;
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
}

button.secondary {
  background: #e8eef3;
  color: var(--text);
}

.row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.box {
  background: #f0f3f7;
  padding: 0.75rem;
  border-radius: 8px;
  font-size: 0.85rem;
  overflow-x: auto;
}

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

#alert-section {
  border: 2px solid var(--alert);
}

.alert-title {
  color: var(--alert);
}

ul {
  padding-left: 1.2rem;
}

li {
  margin: 0.35rem 0;
}

li a {
  color: var(--brand);
}