:root {
  --primary: #05509a;
  --primary-dark: #033a70;
  --accent: #6fc3ff;
  --bg: #f5f9fd;
  --surface: #ffffff;
  --text: #142433;
  --text-muted: #55697b;
  --border: #dde8f2;
  --violet: #5b4fe9;
  --radius: 14px;
  --shadow: 0 2px 10px rgba(5, 80, 154, 0.08), 0 1px 2px rgba(5, 80, 154, 0.06);
  color-scheme: light;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: "Sora", "Inter", sans-serif;
  letter-spacing: -0.02em;
  color: var(--text);
  margin: 0 0 0.5em;
}

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

img {
  max-width: 100%;
}

.wrap {
  max-width: 880px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Top nav ---------- */
.topnav {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: #fff;
  padding: 18px 0;
}

.topnav .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: "Sora", sans-serif;
  font-weight: 700;
  font-size: 1.05rem;
  color: #fff;
  text-decoration: none;
}

.brand img {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  display: block;
}

.navlinks {
  display: flex;
  gap: 22px;
  flex-wrap: wrap;
}

.navlinks a {
  color: rgba(255, 255, 255, 0.88);
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 500;
}

.navlinks a:hover,
.navlinks a.active {
  color: #fff;
  text-decoration: underline;
  text-underline-offset: 4px;
}

/* ---------- Wave divider (signature element) ---------- */
.wave {
  display: block;
  width: 100%;
  height: 48px;
  margin-top: -1px;
}

/* ---------- Hero ---------- */
.hero {
  background: linear-gradient(180deg, var(--primary-dark) 0%, var(--primary) 60%, #0a6bb8 100%);
  color: #fff;
  padding: 56px 0 0;
}

.hero .wrap {
  text-align: center;
  padding-bottom: 40px;
}

.hero-icon {
  width: 84px;
  height: 84px;
  border-radius: 20px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
  margin-bottom: 20px;
}

.hero h1 {
  color: #fff;
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  margin-bottom: 10px;
}

.hero p {
  color: rgba(255, 255, 255, 0.85);
  max-width: 520px;
  margin: 0 auto;
  font-size: 1.05rem;
}

/* ---------- Content ---------- */
main {
  padding: 48px 0 80px;
}

.lede {
  font-size: 1.08rem;
  color: var(--text-muted);
  max-width: 640px;
}

/* ---------- Card grid (index) ---------- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 18px;
  margin-top: 32px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px 22px;
  box-shadow: var(--shadow);
  text-decoration: none;
  color: inherit;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  display: block;
}

.card:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 24px rgba(5, 80, 154, 0.14);
}

.card .icon {
  font-size: 1.8rem;
  display: inline-block;
  margin-bottom: 10px;
}

.card h3 {
  font-size: 1.08rem;
  margin-bottom: 6px;
  color: var(--primary-dark);
}

.card p {
  color: var(--text-muted);
  font-size: 0.94rem;
  margin: 0;
}

/* ---------- Table of contents ---------- */
.toc {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
  margin: 28px 0 40px;
}

.toc h2 {
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.toc ol {
  columns: 2;
  margin: 0;
  padding-left: 20px;
}

.toc a {
  text-decoration: none;
  font-size: 0.94rem;
}

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

/* ---------- Manual sections ---------- */
.section {
  margin: 56px 0;
  padding-top: 8px;
  border-top: 1px solid var(--border);
}

.section:first-of-type {
  border-top: none;
}

.section h2 {
  font-size: 1.4rem;
  display: flex;
  align-items: center;
  gap: 10px;
}

.section h2 .num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  font-size: 0.85rem;
  font-family: "Sora", sans-serif;
  flex-shrink: 0;
}

.section-body {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 28px;
  margin-top: 14px;
  align-items: start;
}

@media (max-width: 680px) {
  .section-body {
    grid-template-columns: 1fr;
  }
  .toc ol {
    columns: 1;
  }
}

.section-body p,
.section-body ul {
  color: var(--text-muted);
  font-size: 0.98rem;
}

.section-body ul {
  padding-left: 20px;
}

.section-body li {
  margin-bottom: 6px;
}

.shot {
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: var(--shadow);
  background: var(--surface);
}

.shot img {
  display: block;
  width: 100%;
}

.note {
  background: #eef6ff;
  border: 1px solid #cfe6fb;
  border-radius: 10px;
  padding: 12px 16px;
  font-size: 0.92rem;
  color: var(--primary-dark);
  margin-top: 12px;
}

.note.warn {
  background: #fff6ec;
  border-color: #f6ddb8;
  color: #7a4a06;
}

/* ---------- Legal pages ---------- */
.legal h2 {
  font-size: 1.15rem;
  margin-top: 34px;
  color: var(--primary-dark);
}

.legal p,
.legal li {
  color: var(--text-muted);
  font-size: 0.98rem;
}

.legal .updated {
  color: var(--text-muted);
  font-size: 0.88rem;
}

.badge {
  display: inline-block;
  background: #eef6ff;
  color: var(--primary-dark);
  border: 1px solid #cfe6fb;
  border-radius: 20px;
  padding: 4px 12px;
  font-size: 0.82rem;
  font-weight: 600;
  margin: 4px 6px 4px 0;
}

/* ---------- Footer ---------- */
footer {
  background: var(--primary-dark);
  color: rgba(255, 255, 255, 0.75);
  padding: 28px 0;
  font-size: 0.88rem;
}

footer a {
  color: rgba(255, 255, 255, 0.9);
}

footer a.accent {
  color: var(--accent);
  font-weight: 600;
}

footer .wrap {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- Manual: language bar + stacked screenshots ---------- */
.langbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 10px;
  margin: 8px 0 22px;
  font-size: 0.9rem;
}

.langbar a {
  color: var(--primary-dark);
  text-decoration: none;
  padding: 3px 10px;
  border: 1px solid var(--border);
  border-radius: 20px;
  background: var(--surface);
}

.langbar a:hover {
  border-color: var(--primary);
}

.langbar a.current {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
  font-weight: 600;
}

.shots {
  display: grid;
  gap: 14px;
}