:root {
  --bg: #f6f4ef;
  --surface: #ffffff;
  --text: #1e2329;
  --muted: #5a6472;
  --line: #d8dde4;
  --primary: #005d7a;
  --primary-strong: #00465d;
  --danger: #b42318;
  --radius: 12px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  font-family: 'IBM Plex Sans', 'Segoe UI', sans-serif;
  color: var(--text);
  background: radial-gradient(circle at top right, #e7f3f8, var(--bg) 60%);
  line-height: 1.5;
}

a {
  color: var(--primary);
}

a:hover {
  color: var(--primary-strong);
}

.page {
  max-width: 860px;
  margin: 0 auto;
  padding: 28px 20px 56px;
}

.hero {
  padding: 24px;
  background: linear-gradient(145deg, #ffffff, #f0f8fb);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

h1,
h2,
h3 {
  margin-top: 0;
  letter-spacing: -0.01em;
}

h1 {
  margin-bottom: 12px;
  font-size: 2rem;
}

h2 {
  margin-top: 28px;
  margin-bottom: 8px;
  font-size: 1.3rem;
}

p,
li {
  color: var(--text);
}

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

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}

nav a {
  display: inline-block;
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  text-decoration: none;
  background: #fff;
}

.card {
  margin-top: 20px;
  padding: 18px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.field {
  display: grid;
  gap: 6px;
  margin-bottom: 12px;
}

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

.value {
  width: 100%;
  min-height: 42px;
  padding: 10px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: #fff;
  font-family:
    ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, 'Liberation Mono', 'Courier New',
    monospace;
  font-size: 0.9rem;
  word-break: break-word;
}

.actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 8px;
}

button {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 8px 12px;
  background: #fff;
  color: var(--text);
  cursor: pointer;
  font: inherit;
}

button:hover {
  border-color: var(--primary);
}

.error {
  border-color: #f3cdca;
  background: #fff6f5;
}

.error .value {
  color: var(--danger);
  border-color: #f3cdca;
}

.notice {
  margin-top: 12px;
  padding: 10px;
  border-radius: 8px;
  background: #f2f7fb;
  border: 1px solid #d2e6f3;
}

.footer {
  margin-top: 30px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.92rem;
}

@media (max-width: 640px) {
  .page {
    padding: 20px 14px 44px;
  }

  h1 {
    font-size: 1.7rem;
  }
}