:root {
  color-scheme: dark;
  --background: #0d1117;
  --surface: #111827;
  --surface-raised: #1b222d;
  --text: #ffffff;
  --text-muted: #a7b0bb;
  --primary: #58a6ff;
  --primary-light: #79b6ff;
  --border: rgba(255, 255, 255, 0.1);
  --max-width: 760px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--background);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", sans-serif;
  font-size: 17px;
  line-height: 1.68;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--primary);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
  transition: color 160ms ease;
}

a:hover {
  color: var(--primary-light);
}

a:focus-visible,
summary:focus-visible {
  outline: 3px solid var(--primary);
  outline-offset: 4px;
  border-radius: 4px;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 100;
  padding: 10px 14px;
  background: var(--text);
  color: var(--background);
  transform: translateY(-180%);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 50;
  border-bottom: 1px solid var(--border);
  background: rgba(13, 17, 23, 0.92);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
}

.site-nav {
  display: flex;
  min-height: 80px;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-size: 1.2rem;
  font-weight: 750;
  text-decoration: none;
}

.brand img {
  width: 40px;
  height: 40px;
  border-radius: 50%;
}

.nav-links,
.footer-links {
  display: flex;
  align-items: center;
  gap: 22px;
  flex-wrap: wrap;
}

.nav-links a,
.footer-links a {
  color: var(--text-muted);
  font-size: 0.94rem;
  text-decoration: none;
}

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

main {
  padding: 136px 24px 88px;
}

article {
  max-width: var(--max-width);
  margin: 0 auto;
}

h1,
h2,
h3 {
  color: var(--text);
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h1 {
  margin: 0 0 12px;
  font-size: clamp(2.4rem, 7vw, 4rem);
  letter-spacing: -0.045em;
}

h2 {
  margin: 56px 0 18px;
  font-size: 1.65rem;
}

h3 {
  margin: 28px 0 10px;
  font-size: 1.12rem;
}

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

.lede {
  margin: 0 0 16px;
  color: #d7dde5;
  font-size: 1.2rem;
}

.meta {
  margin: 0 0 36px;
  color: var(--text-muted);
  font-size: 0.92rem;
}

.summary {
  margin: 32px 0 48px;
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--surface);
}

.summary h2 {
  margin: 0 0 12px;
  font-size: 1.2rem;
}

.summary ul {
  margin-bottom: 0;
}

ul,
ol {
  padding-left: 1.35rem;
}

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

strong {
  color: #e7ebf0;
}

.table-wrap {
  margin: 22px 0;
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: 14px;
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 680px;
  background: rgba(17, 24, 39, 0.48);
}

th,
td {
  padding: 14px 16px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--border);
}

th {
  color: var(--text);
  font-size: 0.9rem;
}

tr:last-child td {
  border-bottom: 0;
}

.callout {
  margin: 24px 0;
  padding: 18px 20px;
  border-left: 3px solid var(--primary);
  border-radius: 0 10px 10px 0;
  background: rgba(88, 166, 255, 0.08);
}

.callout p {
  margin: 0;
}

.faq {
  margin-top: 34px;
}

details {
  border-top: 1px solid var(--border);
  padding: 20px 0;
}

details:last-child {
  border-bottom: 1px solid var(--border);
}

summary {
  color: var(--text);
  cursor: pointer;
  font-weight: 650;
}

details > :last-child {
  margin-bottom: 0;
}

.contact-card {
  margin: 30px 0;
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--surface-raised);
}

.contact-card h2 {
  margin-top: 0;
}

.site-footer {
  border-top: 1px solid var(--border);
  background: #0a0e13;
}

.footer-inner {
  display: flex;
  max-width: 1120px;
  min-height: 110px;
  margin: 0 auto;
  padding: 28px 24px;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.footer-inner p {
  margin: 0;
  font-size: 0.9rem;
}

@media (max-width: 720px) {
  body {
    font-size: 16px;
  }

  .site-nav {
    min-height: 72px;
  }

  .brand span {
    display: none;
  }

  .nav-links {
    gap: 14px;
  }

  .nav-links a {
    font-size: 0.88rem;
  }

  main {
    padding: 112px 20px 68px;
  }

  h2 {
    margin-top: 44px;
  }

  .summary,
  .contact-card {
    padding: 20px;
  }

  .footer-inner {
    align-items: flex-start;
    flex-direction: column;
  }
}

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

  a {
    transition: none;
  }
}