:root {
  color-scheme: light;
  --border: #d9dee3;
  --bg: #f5f7f9;
  --card: #ffffff;
  --text: #1c2733;
  --muted: #62727f;
  --accent: #0f5fa6;
  --error: #b3261e;
}

* {
  box-sizing: border-box;
}

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

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 24px;
  background: var(--card);
  border-bottom: 1px solid var(--border);
}

.brand {
  font-weight: 600;
}

main {
  max-width: 720px;
  margin: 32px auto;
  padding: 0 16px;
}

.view[hidden] {
  display: none;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 24px;
  max-width: 360px;
  margin: 48px auto;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.card h1 {
  margin: 0 0 8px;
  font-size: 1.25rem;
}

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

input {
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 1rem;
}

button {
  cursor: pointer;
  border-radius: 6px;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: #fff;
  padding: 10px 14px;
  font-size: 1rem;
  margin-top: 8px;
}

.link-button {
  background: none;
  border: none;
  color: var(--accent);
  padding: 4px;
  margin: 0;
  font-size: 0.9rem;
}

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

.muted {
  color: var(--muted);
}

.stats {
  display: flex;
  gap: 16px;
  margin: 16px 0 24px;
}

.stat-card {
  flex: 1;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  text-align: center;
}

.stat-value {
  display: block;
  font-size: 1.75rem;
  font-weight: 600;
}

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

table {
  width: 100%;
  border-collapse: collapse;
}

th,
td {
  text-align: left;
  padding: 8px 6px;
  border-bottom: 1px solid var(--border);
  font-size: 0.9rem;
}