@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Sans:wght@400;500;600;700&family=Source+Serif+4:opsz,wght@8..60,600;8..60,700&display=swap');

:root {
  --bg-top: #f5efe6;
  --bg-bottom: #eef3f1;
  --paper: #fffdf9;
  --surface: #f2f5f9;
  --ink: #1f2933;
  --muted: #52606d;
  --line: #d9e2ec;
  --accent: #0b7285;
  --accent-soft: #d6eef2;
  --ok: #0f766e;
  --shadow: 0 20px 40px rgba(17, 24, 39, 0.08);
  --radius: 18px;
}

* {
  box-sizing: border-box;
}

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

body {
  font-family: 'IBM Plex Sans', 'Segoe UI', sans-serif;
  color: var(--ink);
  background: linear-gradient(180deg, var(--bg-top) 0%, var(--bg-bottom) 100%);
  min-height: 100vh;
  line-height: 1.65;
}

.site-shell {
  width: min(980px, calc(100% - 2rem));
  margin: 2rem auto 3rem;
  animation: liftIn 500ms ease;
}

.topbar {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.8rem;
  margin-bottom: 1rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.brand {
  font-weight: 700;
  color: var(--ink);
}

.card {
  background: var(--paper);
  border: 1px solid rgba(15, 23, 42, 0.06);
  box-shadow: var(--shadow);
  border-radius: var(--radius);
  overflow: hidden;
}

.hero {
  padding: 1.8rem 1.8rem 1.1rem;
  background: radial-gradient(circle at top right, var(--accent-soft) 0%, transparent 58%);
  border-bottom: 1px solid var(--line);
}

h1,
h2,
h3 {
  font-family: 'Source Serif 4', Georgia, serif;
  line-height: 1.2;
  letter-spacing: -0.01em;
  margin-top: 0;
  color: #102a43;
}

h1 {
  font-size: clamp(1.8rem, 4vw, 2.55rem);
  margin-bottom: 0.5rem;
}

.meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.meta strong {
  color: var(--ink);
}

.main {
  padding: 1.6rem 1.8rem 2rem;
}

section {
  margin-bottom: 1.7rem;
  animation: fadeIn 450ms ease;
}

section h2 {
  margin-bottom: 0.5rem;
  font-size: 1.38rem;
}

p {
  margin: 0.5rem 0 0.85rem;
}

ul {
  margin: 0.3rem 0 0.95rem;
  padding-left: 1.25rem;
}

li {
  margin-bottom: 0.42rem;
}

.callout {
  border: 1px solid var(--line);
  background: var(--surface);
  padding: 0.95rem 1rem;
  border-radius: 12px;
}

.callout strong {
  color: #0f172a;
}

.nav-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 0.9rem;
  margin-top: 1.2rem;
}

.nav-card {
  display: block;
  text-decoration: none;
  color: inherit;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: linear-gradient(165deg, #ffffff 0%, #f9fbfb 100%);
  padding: 1rem;
  transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease;
}

.nav-card:hover,
.nav-card:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 12px 24px rgba(15, 23, 42, 0.09);
  border-color: #9fc9d0;
  outline: none;
}

.nav-card h3 {
  margin-bottom: 0.35rem;
  font-size: 1.09rem;
}

.nav-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.actions {
  margin-top: 1.25rem;
  display: flex;
  gap: 0.65rem;
  flex-wrap: wrap;
}

.btn {
  border: 1px solid #9ec5cc;
  background: #e7f5f7;
  color: #0c4a56;
  text-decoration: none;
  font-weight: 600;
  padding: 0.52rem 0.85rem;
  border-radius: 999px;
  font-size: 0.92rem;
}

.btn:hover,
.btn:focus-visible {
  background: #d6eef2;
  outline: none;
}

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

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, 'Liberation Mono', monospace;
  background: #f1f5f9;
  border: 1px solid #dbe5ef;
  border-radius: 7px;
  padding: 0.1rem 0.35rem;
  font-size: 0.88em;
}

footer {
  margin-top: 1.4rem;
  color: var(--muted);
  font-size: 0.92rem;
}

@keyframes liftIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 720px) {
  .site-shell {
    width: min(980px, calc(100% - 1rem));
    margin-top: 1rem;
  }

  .hero,
  .main {
    padding: 1.05rem;
  }

  h1 {
    font-size: 1.65rem;
  }

  section h2 {
    font-size: 1.2rem;
  }
}

@media print {
  body {
    background: #fff;
  }

  .site-shell {
    width: 100%;
    margin: 0;
  }

  .card {
    box-shadow: none;
    border: none;
  }

  .actions,
  .topbar {
    display: none;
  }
}