:root {
  --accent: #5FB2D4;
  --accent-strong: #3F97BD;
  --bg: #F3F9FC;
  --bg-grad-a: #EAF5FA;
  --bg-grad-b: #DCEEF6;
  --card: rgba(255, 255, 255, 0.62);
  --card-border: rgba(255, 255, 255, 0.7);
  --text: #16323D;
  --text-soft: #4A6675;
  --text-faint: #7C93A0;
  --divider: rgba(22, 50, 61, 0.08);
  --shadow: 0 20px 50px -24px rgba(31, 86, 110, 0.45);
  --radius: 22px;
  --maxw: 760px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --accent: #92D2EC;
    --accent-strong: #B3E1F3;
    --bg: #0C1418;
    --bg-grad-a: #10202A;
    --bg-grad-b: #0A1116;
    --card: rgba(255, 255, 255, 0.05);
    --card-border: rgba(255, 255, 255, 0.1);
    --text: #EAF3F7;
    --text-soft: #A9C1CD;
    --text-faint: #6F8794;
    --divider: rgba(255, 255, 255, 0.08);
    --shadow: 0 24px 60px -28px rgba(0, 0, 0, 0.7);
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  background-image:
    radial-gradient(120% 80% at 50% -10%, var(--bg-grad-a) 0%, transparent 60%),
    linear-gradient(180deg, var(--bg-grad-a) 0%, var(--bg) 45%, var(--bg-grad-b) 100%);
  background-attachment: fixed;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: var(--accent-strong); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px 96px;
}

/* Header */
.site-header {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 40px 24px 8px;
  display: flex;
  align-items: center;
  gap: 16px;
}

.site-header .logo {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  box-shadow: 0 8px 22px -8px rgba(31, 86, 110, 0.55);
  flex-shrink: 0;
}

.site-header .brand { display: flex; flex-direction: column; }
.site-header .brand strong {
  font-size: 19px;
  font-weight: 700;
  letter-spacing: -0.01em;
}
.site-header .brand span {
  font-size: 13px;
  color: var(--text-faint);
}

.site-header nav {
  margin-left: auto;
  display: flex;
  gap: 22px;
  font-size: 15px;
  font-weight: 500;
}
.site-header nav a { color: var(--text-soft); }
.site-header nav a:hover { color: var(--accent-strong); text-decoration: none; }

/* Hero */
.hero {
  text-align: center;
  padding: 56px 24px 20px;
  max-width: var(--maxw);
  margin: 0 auto;
}
.hero .logo-lg {
  width: 128px;
  height: 128px;
  border-radius: 30px;
  box-shadow: var(--shadow);
  margin-bottom: 26px;
}
.hero h1 {
  font-size: clamp(30px, 6vw, 44px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin: 0 0 14px;
}
.hero p {
  font-size: 18px;
  color: var(--text-soft);
  max-width: 520px;
  margin: 0 auto;
}

.badges {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin-top: 28px;
}
.badge {
  font-size: 14px;
  font-weight: 600;
  padding: 9px 16px;
  border-radius: 999px;
  color: var(--accent-strong);
  background: var(--card);
  border: 1px solid var(--card-border);
  backdrop-filter: blur(16px) saturate(140%);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
}

/* Card */
.card {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  backdrop-filter: blur(22px) saturate(150%);
  -webkit-backdrop-filter: blur(22px) saturate(150%);
  padding: 34px 34px;
  margin-top: 22px;
}

.card h2 {
  font-size: 21px;
  letter-spacing: -0.01em;
  margin: 0 0 12px;
}
.card h2:not(:first-child) { margin-top: 30px; }
.card h3 {
  font-size: 16px;
  margin: 22px 0 6px;
  color: var(--text);
}
.card p { color: var(--text-soft); margin: 0 0 14px; }
.card ul { color: var(--text-soft); margin: 0 0 14px; padding-left: 20px; }
.card li { margin-bottom: 8px; }
.card strong { color: var(--text); }

.lede {
  font-size: 17px;
  color: var(--text-soft);
}

.updated {
  font-size: 13px;
  color: var(--text-faint);
  margin-top: 4px;
}

.divider { height: 1px; background: var(--divider); border: 0; margin: 28px 0; }

/* Grid of link cards (index) */
.link-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 18px;
  margin-top: 30px;
}
.link-card {
  display: block;
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  backdrop-filter: blur(20px) saturate(150%);
  -webkit-backdrop-filter: blur(20px) saturate(150%);
  padding: 26px;
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}
.link-card:hover {
  transform: translateY(-3px);
  text-decoration: none;
  box-shadow: 0 28px 60px -26px rgba(31, 86, 110, 0.55);
}
.link-card .icn { font-size: 26px; }
.link-card h3 { margin: 12px 0 6px; font-size: 18px; color: var(--text); }
.link-card p { margin: 0; color: var(--text-soft); font-size: 15px; }
.link-card .arrow { color: var(--accent-strong); font-weight: 600; font-size: 15px; margin-top: 12px; display: inline-block; }

/* Contact block */
.contact {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px 20px;
  border-radius: 16px;
  background: rgba(95, 178, 212, 0.1);
  border: 1px solid rgba(95, 178, 212, 0.22);
  margin-top: 6px;
}
.contact .icn { font-size: 22px; }
.contact a { font-weight: 600; font-size: 17px; }

.note {
  font-size: 14px;
  color: var(--text-faint);
  font-style: italic;
  border-left: 3px solid var(--accent);
  padding: 4px 0 4px 16px;
  margin: 18px 0;
}

/* Footer */
.site-footer {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 40px 24px 60px;
  text-align: center;
  color: var(--text-faint);
  font-size: 13px;
}
.site-footer a { color: var(--text-faint); }
.site-footer .links { margin-bottom: 10px; display: flex; gap: 18px; justify-content: center; flex-wrap: wrap; }
.site-footer .links a { color: var(--text-soft); font-weight: 500; }

/* Back link */
.back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-soft);
  margin-bottom: 6px;
}
.back:hover { color: var(--accent-strong); text-decoration: none; }

@media (max-width: 560px) {
  .site-header { padding-top: 28px; }
  .site-header nav { gap: 16px; font-size: 14px; }
  .card { padding: 26px 22px; }
  .hero { padding-top: 40px; }
}