:root {
  --bg: #f3f7ff;
  --card: #ffffff;
  --text: #0f172a;
  --muted: #475569;
  --line: #dbe5f0;
  --accent: #0d9488;
  --accent-2: #0369a1;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--text);
  background: linear-gradient(180deg, #e9f0ff 0%, var(--bg) 58%);
  line-height: 1.55;
}

main {
  max-width: 900px;
  margin: 0 auto;
  padding: 24px 16px 48px;
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: 0 10px 28px rgba(15, 23, 42, 0.06);
  padding: 24px;
}

.brand {
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 700;
  color: var(--accent);
}

h1 {
  margin: 8px 0 8px;
  font-size: 30px;
  line-height: 1.2;
}

h2 {
  margin: 26px 0 10px;
  font-size: 20px;
  line-height: 1.3;
}

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

.meta {
  color: var(--muted);
  font-size: 14px;
}

ul {
  margin: 10px 0 0 22px;
}

.actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 20px;
}

.button {
  display: inline-block;
  text-decoration: none;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px 14px;
  font-weight: 600;
  color: var(--text);
  background: #f8fbff;
}

.button.primary {
  background: #0f766e;
  border-color: #0f766e;
  color: white;
}

a {
  color: var(--accent-2);
}

.note {
  border-left: 3px solid var(--accent);
  background: #f0fdfa;
  border-radius: 6px;
  padding: 8px 12px;
}

@media (max-width: 640px) {
  .card {
    padding: 18px;
  }

  h1 {
    font-size: 26px;
  }
}