:root {
  color-scheme: light;
  --ink: #172033;
  --muted: #5b6476;
  --line: #d9dfeb;
  --page: #f6f8fc;
  --panel: #ffffff;
  --blue: #2364d8;
  --green: #0d8f68;
  --amber: #b86b00;
  --rose: #b4234a;
  --shadow: 0 18px 42px rgba(31, 43, 70, 0.10);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at 10% 10%, rgba(35, 100, 216, 0.10), transparent 28rem),
    radial-gradient(circle at 90% 0%, rgba(13, 143, 104, 0.10), transparent 24rem),
    var(--page);
  color: var(--ink);
  line-height: 1.62;
}

a {
  color: var(--blue);
  font-weight: 700;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.shell {
  width: min(1040px, calc(100% - 36px));
  margin: 0 auto;
}

.topbar {
  border-bottom: 1px solid rgba(23, 32, 51, 0.08);
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: blur(14px);
  position: sticky;
  top: 0;
  z-index: 2;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
  gap: 18px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
}

.mark {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  color: #fff;
  background: linear-gradient(135deg, #2364d8, #0d8f68 55%, #f2b84b);
  box-shadow: 0 8px 20px rgba(35, 100, 216, 0.22);
}

.navlinks {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 14px;
  font-size: 14px;
}

.hero {
  padding: 64px 0 30px;
}

.eyebrow {
  color: var(--green);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1 {
  max-width: 820px;
  margin: 12px 0 14px;
  font-size: clamp(34px, 6vw, 64px);
  line-height: 1.02;
}

h2 {
  margin: 0 0 12px;
  font-size: clamp(22px, 3vw, 30px);
  line-height: 1.18;
}

h3 {
  margin: 24px 0 8px;
  font-size: 18px;
}

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

.lead {
  max-width: 760px;
  font-size: 18px;
}

.meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.pill {
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.78);
  padding: 7px 12px;
  color: var(--muted);
  font-size: 14px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 18px;
}

.section {
  padding: 14px 0 54px;
}

.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 24px;
  box-shadow: 0 10px 26px rgba(31, 43, 70, 0.06);
}

.card.strong {
  box-shadow: var(--shadow);
}

.note {
  border-color: #f1d595;
  background: #fff8e8;
}

.ok {
  border-color: #bfe7d9;
  background: #eefbf6;
}

.danger {
  border-color: #f3c0cc;
  background: #fff1f4;
}

.list-clean {
  padding-left: 20px;
}

.kv {
  display: grid;
  grid-template-columns: 190px 1fr;
  gap: 10px 18px;
}

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

.footer {
  padding: 28px 0 46px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}

.footer-row {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

@media (max-width: 680px) {
  .shell {
    width: min(100% - 24px, 1040px);
  }

  .nav {
    align-items: flex-start;
    flex-direction: column;
    padding: 14px 0;
  }

  .navlinks {
    justify-content: flex-start;
  }

  .hero {
    padding-top: 42px;
  }

  .card {
    padding: 20px;
  }

  .kv {
    grid-template-columns: 1fr;
  }
}