:root {
  --bg: #f5f7fb;
  --surface: rgba(255, 255, 255, 0.84);
  --surface-border: rgba(15, 23, 42, 0.08);
  --text: #101828;
  --text-muted: #4b5565;
  --brand: #0a84ff;
  --brand-deep: #0066d6;
  --warning: #b54708;
  --shadow: 0 12px 34px rgba(15, 23, 42, 0.1);
  --radius: 16px;
  --max-width: 980px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  color: var(--text);
  background:
    radial-gradient(circle at 8% 12%, #d6ebff 0%, rgba(214, 235, 255, 0) 40%),
    radial-gradient(circle at 94% -4%, #e7f9f0 0%, rgba(231, 249, 240, 0) 34%),
    linear-gradient(180deg, #f9fbff 0%, #eef2f8 100%);
  font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'Segoe UI', sans-serif;
  line-height: 1.6;
}

a {
  color: var(--brand-deep);
  text-decoration: none;
}

a:hover,
a:focus-visible {
  text-decoration: underline;
}

.site-shell {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.topbar {
  position: sticky;
  top: 0;
  backdrop-filter: blur(16px);
  background: rgba(255, 255, 255, 0.8);
  border-bottom: 1px solid var(--surface-border);
  z-index: 20;
}

.topbar-inner {
  width: min(var(--max-width), calc(100% - 2rem));
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 0.8rem 0;
}

.brand {
  font-weight: 760;
  font-size: 1rem;
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
}

.nav-links a {
  padding: 0.3rem 0.5rem;
  border-radius: 8px;
  color: var(--text-muted);
  font-weight: 560;
}

.nav-links a.current,
.nav-links a:hover {
  background: rgba(10, 132, 255, 0.1);
  color: var(--brand-deep);
  text-decoration: none;
}

main {
  width: min(var(--max-width), calc(100% - 2rem));
  margin: 2rem auto 1.5rem;
  flex: 1;
}

.hero {
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.92), rgba(255, 255, 255, 0.72));
  border: 1px solid var(--surface-border);
  border-radius: calc(var(--radius) + 6px);
  box-shadow: var(--shadow);
  padding: clamp(1.4rem, 2vw, 2.2rem);
}

.hero h1 {
  margin: 0 0 0.7rem;
  font-size: clamp(1.7rem, 3.2vw, 2.5rem);
  line-height: 1.2;
}

.hero p {
  margin: 0;
  color: var(--text-muted);
  max-width: 72ch;
}

.badge-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 1.1rem;
}

.badge {
  border: 1px solid rgba(16, 24, 40, 0.1);
  color: #0f1728;
  background: rgba(255, 255, 255, 0.78);
  border-radius: 999px;
  padding: 0.35rem 0.8rem;
  font-size: 0.88rem;
  font-weight: 550;
}

.grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 1rem;
  margin-top: 1rem;
}

.card {
  grid-column: span 12;
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius);
  padding: 1rem 1.05rem;
  box-shadow: 0 6px 20px rgba(15, 23, 42, 0.06);
}

.card h2 {
  margin-top: 0;
  margin-bottom: 0.45rem;
  font-size: 1.12rem;
}

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

.card ul {
  margin-top: 0.4rem;
  margin-bottom: 0;
  padding-left: 1.2rem;
}

.footer {
  width: min(var(--max-width), calc(100% - 2rem));
  margin: 0 auto 1.5rem;
  color: var(--text-muted);
  font-size: 0.93rem;
}

.footer-wrap {
  border-top: 1px solid var(--surface-border);
  padding-top: 1rem;
  display: flex;
  justify-content: space-between;
  gap: 0.8rem;
  flex-wrap: wrap;
}

.kv {
  margin: 0;
}

.kv dt {
  font-weight: 650;
  color: var(--text);
}

.kv dd {
  margin: 0 0 0.45rem;
  color: var(--text-muted);
}

@media (min-width: 760px) {
  .span-6 {
    grid-column: span 6;
  }

  .span-4 {
    grid-column: span 4;
  }

  .span-8 {
    grid-column: span 8;
  }
}