:root {
  color-scheme: light;
  --bg: #f4f8ff;
  --card: #ffffff;
  --line: #d8e4f4;
  --text: #133152;
  --muted: #567090;
  --ok: #1f7fd0;
  --danger: #c1454a;
}

body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  background: linear-gradient(180deg, #f8fbff 0%, var(--bg) 100%);
  color: var(--text);
  font: 16px/1.6 "BIZ UDPGothic", "Yu Gothic UI", "Meiryo", sans-serif;
  padding: 1rem;
}

.card {
  width: min(520px, 100%);
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--card);
  padding: 1rem 1.1rem;
  box-shadow: 0 10px 28px rgba(20, 52, 92, 0.08);
}

h1 {
  font-size: 1.1rem;
  margin: 0 0 0.4rem;
}

p {
  margin: 0.2rem 0;
}

.muted {
  color: var(--muted);
  font-size: 0.95rem;
}

.status {
  font-weight: 700;
  margin: 0.35rem 0 0.5rem;
}

.status.ok {
  color: var(--ok);
}

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

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.75rem;
}

.btn {
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #f7fbff;
  color: var(--text);
  padding: 0.5rem 0.8rem;
  text-decoration: none;
  font: inherit;
  cursor: pointer;
}

.btn.primary {
  border-color: var(--ok);
  background: var(--ok);
  color: #fff;
}