:root {
  color-scheme: light dark;
  --ink: #17202a;
  --muted: #5f6b76;
  --line: rgba(23, 32, 42, 0.12);
  --surface: rgba(255, 255, 255, 0.88);
  --canvas: #eef4f7;
  --accent: #045c90;
  --accent-soft: #e2eef6;
  --shadow: 0 20px 60px rgba(22, 47, 58, 0.10);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 85% 0%, rgba(4, 92, 144, 0.08), transparent 32rem),
    linear-gradient(180deg, #f8fbfc 0%, var(--canvas) 100%);
  line-height: 1.65;
}

a { color: var(--accent); text-underline-offset: 0.18em; }
a:hover { text-decoration-thickness: 2px; }

.site-header {
  width: min(1080px, calc(100% - 32px));
  margin: 0 auto;
  padding: 24px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--ink);
  font-weight: 750;
  letter-spacing: -0.02em;
  text-decoration: none;
  white-space: nowrap;
  flex-shrink: 0;
}

.brand img { width: 42px; height: 42px; border-radius: 11px; }

.nav { display: flex; align-items: center; gap: 18px; font-size: 0.94rem; }
.nav a { color: var(--muted); text-decoration: none; }
.nav a[aria-current="page"] { color: var(--ink); font-weight: 650; }

main {
  width: min(880px, calc(100% - 32px));
  margin: 18px auto 64px;
}

.hero { padding: 44px 4px 32px; }
.eyebrow { margin: 0 0 12px; color: var(--accent); font-size: 0.86rem; font-weight: 750; letter-spacing: 0.08em; text-transform: uppercase; }
h1 { margin: 0; max-width: 760px; font-size: clamp(2.25rem, 7vw, 4.4rem); line-height: 1.02; letter-spacing: -0.055em; }
.lede { max-width: 720px; margin: 22px 0 0; color: var(--muted); font-size: clamp(1.05rem, 2.5vw, 1.25rem); }
.updated { margin: 16px 0 0; color: var(--muted); font-size: 0.92rem; }

.section-block { padding: 70px 0; }
.section-heading { max-width: 720px; margin-bottom: 30px; }
.section-heading h2 { font-size: clamp(2rem, 5vw, 3.35rem); letter-spacing: -0.045em; }
.section-heading p { color: var(--muted); font-size: 1.08rem; }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.feature-card {
  min-height: 220px; padding: 26px; border: 1px solid var(--line); border-radius: 26px; background: var(--surface);
}
.feature-icon { width: 44px; height: 44px; display: grid; place-items: center; margin-bottom: 22px; border-radius: 14px; background: var(--accent-soft); color: var(--accent); font-size: 1.25rem; font-weight: 800; }
.feature-card h3 { margin: 0 0 8px; font-size: 1.16rem; }
.feature-card p { color: var(--muted); font-size: .95rem; }

.faq { display: grid; gap: 12px; }
.faq details { padding: 20px 22px; border: 1px solid var(--line); border-radius: 20px; background: var(--surface); }
.faq summary { cursor: pointer; font-weight: 750; }
.faq details p { color: var(--muted); }
.support-card { padding: clamp(28px, 5vw, 48px); border-radius: 28px; background: var(--accent-soft); }

.summary, .document {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 28px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

.summary { padding: 24px; margin-bottom: 22px; }
.summary h2 { margin-top: 0; }
.summary-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.summary-item { padding: 16px; border-radius: 18px; background: var(--accent-soft); }
.summary-item strong { display: block; margin-bottom: 4px; font-size: 0.98rem; }
.summary-item span { color: #36495a; font-size: 0.9rem; }

.document { padding: clamp(24px, 5vw, 52px); }
.document section + section { border-top: 1px solid var(--line); margin-top: 34px; padding-top: 28px; }
h2 { margin: 0 0 12px; font-size: clamp(1.3rem, 3vw, 1.65rem); line-height: 1.25; letter-spacing: -0.025em; }
h3 { margin: 24px 0 8px; font-size: 1.05rem; }
p { margin: 10px 0; }
ul { margin: 10px 0; padding-left: 1.25rem; }
li + li { margin-top: 8px; }
.note { padding: 16px 18px; border-left: 4px solid var(--accent); border-radius: 6px 14px 14px 6px; background: var(--accent-soft); }

footer { width: min(880px, calc(100% - 32px)); margin: 0 auto; padding: 0 0 38px; color: var(--muted); font-size: 0.88rem; }
footer div { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px 24px; border-top: 1px solid var(--line); padding-top: 24px; }

@media (max-width: 680px) {
  .site-header { align-items: flex-start; }
  .nav { gap: 12px; flex-wrap: wrap; justify-content: flex-end; }
  .summary-grid { grid-template-columns: 1fr; }
  .hero { padding-top: 28px; }
  .document { border-radius: 22px; }
  .feature-grid { grid-template-columns: 1fr; }
  .section-block { padding: 54px 0; }
}

@media (min-width: 681px) and (max-width: 900px) {
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink: #eef6f7;
    --muted: #aab9bd;
    --line: rgba(231, 247, 248, 0.13);
    --surface: rgba(21, 30, 34, 0.9);
    --canvas: #0d1518;
    --accent: #6cb8e6;
    --accent-soft: #12304a;
    --shadow: 0 22px 65px rgba(0, 0, 0, 0.25);
  }
  body { background: radial-gradient(circle at 85% 0%, rgba(108, 184, 230, 0.12), transparent 32rem), #0d1518; }
  .summary-item span { color: #b4c9d9; }
}

@media print {
  body { background: white; color: black; }
  .site-header, footer, .summary { display: none; }
  main { width: auto; margin: 0; }
  .hero { padding-top: 0; }
  .document { border: 0; box-shadow: none; padding: 0; }
}