:root {
  --bg: #f4f7f7;
  --surface: #ffffff;
  --ink: #111827;
  --muted: #6b7280;
  --line: #e5e7eb;
  --brand: #02929a;
  --brand-dark: #027a80;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  color: var(--ink);
  background:
    radial-gradient(1200px 500px at 10% -10%, rgba(4, 168, 176, 0.12), transparent 60%),
    radial-gradient(900px 400px at 100% 0%, rgba(2, 122, 128, 0.1), transparent 55%),
    var(--bg);
  line-height: 1.65;
}

.wrap {
  width: min(760px, calc(100% - 2rem));
  margin: 0 auto;
}

.top {
  background: #000;
  color: #fff;
  padding: 0.85rem 0;
  border-bottom: 1px solid #1f1f1f;
}

.top .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
  line-height: 0;
}

.brand-logo {
  display: block;
  height: 44px;
  width: auto;
  max-width: min(240px, 58vw);
  object-fit: contain;
}

nav {
  display: flex;
  gap: 1rem;
  font-family: system-ui, -apple-system, sans-serif;
  font-size: 0.92rem;
  font-weight: 600;
}

nav a {
  color: rgba(255, 255, 255, 0.88);
  text-decoration: none;
}

nav a[aria-current="page"],
nav a:hover {
  color: #fff;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.doc {
  background: var(--surface);
  margin-top: 1.5rem;
  margin-bottom: 2rem;
  padding: 1.75rem 1.5rem 2rem;
  border-radius: 16px;
  border: 1px solid var(--line);
  box-shadow: 0 10px 30px rgba(17, 24, 39, 0.04);
}

.eyebrow {
  margin: 0 0 0.35rem;
  font-family: system-ui, -apple-system, sans-serif;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--brand-dark);
}

h1 {
  margin: 0 0 0.4rem;
  font-size: clamp(1.8rem, 4vw, 2.35rem);
  line-height: 1.2;
}

.meta {
  margin: 0 0 1.5rem;
  font-family: system-ui, -apple-system, sans-serif;
  font-size: 0.9rem;
  color: var(--muted);
}

section + section {
  margin-top: 1.35rem;
  padding-top: 1.35rem;
  border-top: 1px solid var(--line);
}

h2 {
  margin: 0 0 0.45rem;
  font-size: 1.15rem;
  font-family: system-ui, -apple-system, sans-serif;
}

p {
  margin: 0;
  color: #374151;
}

a {
  color: var(--brand-dark);
}

.footer {
  padding-bottom: 2rem;
  text-align: center;
  font-family: system-ui, -apple-system, sans-serif;
  font-size: 0.85rem;
  color: var(--muted);
}

.footer a {
  color: var(--brand-dark);
  text-decoration: none;
}

.footer a:hover {
  text-decoration: underline;
}

.home {
  text-align: left;
}

.home h1 {
  margin-bottom: 0.75rem;
}

.home p {
  margin-bottom: 1.25rem;
}

.links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.links a {
  display: inline-block;
  font-family: system-ui, -apple-system, sans-serif;
  font-weight: 700;
  text-decoration: none;
  background: var(--brand);
  color: #fff;
  padding: 0.7rem 1rem;
  border-radius: 10px;
}

.links a.secondary {
  background: #fff;
  color: var(--brand-dark);
  border: 1px solid var(--line);
}

.faq-section h2 {
  margin-bottom: 0.75rem;
}

.faq-item {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fafafa;
  padding: 0;
  margin: 0 0 0.55rem;
  overflow: hidden;
}

.faq-item summary {
  list-style: none;
  cursor: pointer;
  padding: 0.85rem 1rem;
  font-family: system-ui, -apple-system, sans-serif;
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--ink);
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "+";
  float: right;
  color: var(--muted);
  font-weight: 600;
}

.faq-item[open] summary::after {
  content: "–";
}

.faq-item[open] summary {
  border-bottom: 1px solid var(--line);
  background: #fff;
}

.faq-item p {
  padding: 0.85rem 1rem 1rem;
  font-size: 0.98rem;
  background: #fff;
}