:root {
  color-scheme: light;
  --ink: #0b1728;
  --muted: #526071;
  --line: #dfe8f2;
  --surface: rgba(255, 255, 255, 0.88);
  --surface-strong: #ffffff;
  --blue: #1677d2;
  --blue-dark: #075cae;
  --blue-soft: #eaf5ff;
  --amber-soft: #fff5da;
  --amber-ink: #6f4d00;
  --shadow: 0 18px 50px rgba(21, 71, 116, 0.1);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  background:
    radial-gradient(circle at 8% 0%, rgba(57, 163, 255, 0.15), transparent 33rem),
    linear-gradient(180deg, #f7fbff 0%, #edf6fd 100%);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 17px;
  line-height: 1.62;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--blue-dark);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

a:hover {
  color: var(--blue);
}

a:focus-visible,
summary:focus-visible {
  outline: 3px solid rgba(22, 119, 210, 0.34);
  outline-offset: 4px;
  border-radius: 5px;
}

.site-header {
  border-bottom: 1px solid rgba(209, 224, 237, 0.88);
  background: rgba(247, 251, 255, 0.8);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  position: sticky;
  top: 0;
  z-index: 10;
}

.nav {
  align-items: center;
  display: flex;
  gap: 20px;
  justify-content: space-between;
  margin: 0 auto;
  max-width: 1000px;
  min-height: 68px;
  padding: 10px 24px;
}

.brand {
  align-items: center;
  color: var(--ink);
  display: inline-flex;
  font-size: 17px;
  font-weight: 750;
  gap: 10px;
  letter-spacing: -0.02em;
  text-decoration: none;
}

.brand-mark {
  align-items: center;
  background: var(--blue);
  border-radius: 11px;
  box-shadow: 0 8px 18px rgba(22, 119, 210, 0.22);
  color: white;
  display: inline-flex;
  height: 36px;
  justify-content: center;
  width: 36px;
}

.brand-mark svg {
  height: 22px;
  width: 22px;
}

.nav-links {
  align-items: center;
  display: flex;
  gap: 20px;
}

.nav-links a {
  color: var(--muted);
  font-size: 15px;
  font-weight: 650;
  text-decoration: none;
}

.nav-links a[aria-current="page"] {
  color: var(--blue-dark);
}

main {
  margin: 0 auto;
  max-width: 860px;
  padding: 76px 24px 88px;
}

.eyebrow {
  color: var(--blue-dark);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.12em;
  margin: 0 0 14px;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  letter-spacing: -0.035em;
  line-height: 1.14;
}

h1 {
  font-size: clamp(42px, 7vw, 68px);
  margin: 0;
  max-width: 760px;
}

.lede {
  color: var(--muted);
  font-size: clamp(19px, 3vw, 23px);
  line-height: 1.5;
  margin: 24px 0 0;
  max-width: 730px;
}

.updated {
  color: #687687;
  font-size: 14px;
  margin-top: 20px;
}

.summary-grid {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin: 42px 0 50px;
}

.summary-card,
.contact-card,
.callout {
  background: var(--surface);
  border: 1px solid rgba(211, 225, 238, 0.95);
  border-radius: 20px;
  box-shadow: var(--shadow);
}

.summary-card {
  padding: 22px;
}

.summary-card strong {
  display: block;
  font-size: 17px;
  line-height: 1.3;
  margin-bottom: 5px;
}

.summary-card span {
  color: var(--muted);
  display: block;
  font-size: 15px;
  line-height: 1.5;
}

.content {
  background: var(--surface-strong);
  border: 1px solid var(--line);
  border-radius: 26px;
  box-shadow: var(--shadow);
  padding: clamp(24px, 6vw, 52px);
}

.content section + section {
  border-top: 1px solid var(--line);
  margin-top: 38px;
  padding-top: 38px;
}

h2 {
  font-size: clamp(25px, 4vw, 32px);
  margin: 0 0 16px;
}

h3 {
  font-size: 20px;
  margin: 28px 0 8px;
}

p {
  margin: 0 0 16px;
}

ul,
ol {
  margin: 12px 0 18px;
  padding-left: 24px;
}

li + li {
  margin-top: 8px;
}

.callout {
  background: var(--amber-soft);
  border-color: #f2dfa6;
  color: var(--amber-ink);
  margin: 30px 0;
  padding: 20px 22px;
}

.callout strong {
  color: #523800;
}

.button {
  align-items: center;
  background: var(--blue);
  border-radius: 999px;
  box-shadow: 0 10px 24px rgba(22, 119, 210, 0.23);
  color: #fff;
  display: inline-flex;
  font-weight: 750;
  gap: 9px;
  justify-content: center;
  padding: 13px 20px;
  text-decoration: none;
}

.button:hover {
  background: var(--blue-dark);
  color: #fff;
}

.contact-card {
  margin: 38px 0 50px;
  padding: clamp(24px, 5vw, 38px);
}

.contact-card h2 {
  margin-bottom: 10px;
}

.contact-card p {
  color: var(--muted);
  max-width: 640px;
}

.faq-list {
  display: grid;
  gap: 12px;
}

details {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 16px;
  overflow: hidden;
}

summary {
  cursor: pointer;
  font-weight: 720;
  line-height: 1.35;
  list-style: none;
  padding: 19px 54px 19px 20px;
  position: relative;
}

summary::-webkit-details-marker {
  display: none;
}

summary::after {
  color: var(--blue);
  content: "+";
  font-size: 28px;
  font-weight: 400;
  line-height: 1;
  position: absolute;
  right: 20px;
  top: 16px;
}

details[open] summary::after {
  content: "−";
}

.answer {
  border-top: 1px solid var(--line);
  color: var(--muted);
  padding: 17px 20px 4px;
}

.answer p:last-child,
.answer ol:last-child,
.answer ul:last-child {
  margin-bottom: 16px;
}

footer {
  color: #657385;
  font-size: 14px;
  margin: 36px auto 0;
  max-width: 860px;
  padding: 0 24px 44px;
  text-align: center;
}

footer a {
  color: inherit;
}

@media (max-width: 650px) {
  .nav {
    padding-inline: 18px;
  }

  .nav-links {
    gap: 14px;
  }

  main {
    padding: 50px 16px 64px;
  }

  .summary-grid {
    grid-template-columns: 1fr;
    margin-top: 34px;
  }

  .content {
    border-radius: 22px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}