:root {
  --bg: #090e18;
  --bg-soft: #0d1422;
  --surface: #0f1728;
  --surface-2: #101b2e;
  --text: #edf4ff;
  --muted: #a2afc4;
  --muted-strong: #c1ccdc;
  --line: rgba(150, 174, 214, 0.16);
  --line-strong: rgba(166, 192, 235, 0.24);
  --accent: #79e6ff;
  --accent-2: #7fa7ff;
  --glow: rgba(121, 230, 255, 0.18);
  --radius: 18px;
  --shadow: 0 16px 48px rgba(0, 0, 0, 0.34);
  --header-h: 76px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(127, 167, 255, 0.12), transparent 30%),
    radial-gradient(circle at top right, rgba(121, 230, 255, 0.08), transparent 28%),
    linear-gradient(180deg, #090e18 0%, #09111d 45%, #090d17 100%);
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.92em;
  color: #d8f7ff;
  background: rgba(120, 230, 255, 0.08);
  border: 1px solid rgba(120, 230, 255, 0.14);
  border-radius: 8px;
  padding: 0.15rem 0.4rem;
}
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  min-height: var(--header-h);
  border-bottom: 1px solid var(--line);
  background: rgba(9, 14, 24, 0.78);
  backdrop-filter: blur(18px);
}
.site-header-inner {
  max-width: 1180px;
  margin: 0 auto;
  min-height: var(--header-h);
  padding: 0 1.4rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.85rem;
}
.brand-mark {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  font-size: 0.88rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  color: #081019;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 0 0 1px rgba(255,255,255,0.05), 0 10px 24px var(--glow);
}
.brand-copy { display: grid; gap: 0.15rem; }
.brand-copy strong { font-size: 0.98rem; }
.brand-copy small { color: var(--muted); font-size: 0.8rem; }
.topnav {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  flex-wrap: wrap;
}
.topnav a {
  color: var(--muted);
  padding: 0.7rem 0.9rem;
  border-radius: 12px;
  font-size: 0.95rem;
}
.topnav a:hover, .topnav a.active {
  color: var(--text);
  background: rgba(255,255,255,0.04);
}
.page-shell {
  max-width: 1180px;
  margin: 0 auto;
  padding: 2.2rem 1.4rem 4.25rem;
}
.page-shell-narrow { max-width: 980px; }
.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(280px, 0.75fr);
  gap: 1rem;
  align-items: stretch;
}
.hero-copy, .surface-card, .hero-panel {
  background: linear-gradient(180deg, rgba(16,27,46,0.88), rgba(12,20,34,0.92));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.hero-copy {
  padding: 2rem;
  position: relative;
  overflow: hidden;
}
.hero-copy::after {
  content: "";
  position: absolute;
  inset: auto -80px -120px auto;
  width: 280px;
  height: 280px;
  background: radial-gradient(circle, rgba(121, 230, 255, 0.12), transparent 65%);
  pointer-events: none;
}
.hero-panel { padding: 1.5rem; }
.eyebrow, .panel-kicker, .info-kicker, .faq-sidebar-label {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 0.35rem 0.7rem;
  border-radius: 999px;
  color: #ddf9ff;
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  background: rgba(121, 230, 255, 0.08);
  border: 1px solid rgba(121, 230, 255, 0.14);
}
.hero-copy h1, .compact-heading h1 {
  margin: 1rem 0 1rem;
  font-size: clamp(2.8rem, 6vw, 5rem);
  line-height: 0.96;
  letter-spacing: -0.055em;
}
.lead, .section-heading p, .feature-card p, .info-card p, .hero-panel p, .steps-list li, .markdown-surface p, .markdown-surface li {
  color: var(--muted);
  line-height: 1.72;
}
.lead { max-width: 780px; font-size: 1.08rem; }
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  margin: 1.5rem 0 1rem;
}
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0.85rem 1.15rem;
  border-radius: 14px;
  font-weight: 600;
  border: 1px solid transparent;
}
.button-primary {
  color: #081019;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 14px 36px var(--glow);
}
.button-secondary {
  background: rgba(255,255,255,0.03);
  border-color: rgba(255,255,255,0.08);
}
.hero-note {
  margin: 0;
  max-width: 820px;
  color: var(--muted-strong);
}
.text-link {
  color: #dff7ff;
  text-decoration: underline;
  text-underline-offset: 0.18em;
}
.quick-grid, .feature-grid, .gallery-grid {
  display: grid;
  gap: 1rem;
}
.quick-grid {
  margin-top: 1rem;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}
.info-card, .feature-card, .gallery-card, .faq-sidebar {
  background: linear-gradient(180deg, rgba(15,23,40,0.92), rgba(11,18,31,0.94));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.info-card, .feature-card { padding: 1.2rem; }
.info-card h3, .feature-card h3, .hero-panel h2, .detail-card h3 {
  margin: 0.7rem 0 0.45rem;
  font-size: 1.02rem;
  line-height: 1.3;
}
.section-block { padding-top: 4rem; }
.section-heading {
  max-width: 760px;
  margin: 0 auto 1.6rem;
  text-align: center;
}
.section-heading-left {
  text-align: left;
  margin-left: 0;
}
.section-heading h2 {
  margin: 0.9rem 0 0.65rem;
  font-size: clamp(2rem, 4vw, 3.1rem);
  line-height: 1.03;
  letter-spacing: -0.045em;
}
.compact-heading { margin-bottom: 1rem; }
.feature-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}
.split-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  gap: 1rem;
  align-items: start;
}
.steps-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.85rem;
}
.steps-list li {
  padding: 1rem 1.05rem;
  border-radius: 14px;
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.06);
}
.detail-card { padding: 1.3rem; }
.gallery-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}
.gallery-card { overflow: hidden; }
.gallery-card img {
  width: 100%;
  aspect-ratio: 9 / 19.5;
  object-fit: cover;
  background: #0b1220;
}
.gallery-card figcaption {
  padding: 0.95rem 1rem 1rem;
  color: var(--muted);
}
.faq-shell {
  max-width: 1180px;
  margin: 0 auto;
  padding: 2rem 1.4rem 4.25rem;
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  gap: 1rem;
  align-items: start;
}
.faq-sidebar {
  position: sticky;
  top: calc(var(--header-h) + 1rem);
  padding: 1rem;
}
.faq-nav {
  display: grid;
  gap: 0.2rem;
  margin-top: 0.9rem;
}
.faq-nav-link {
  color: var(--muted);
  padding: 0.72rem 0.8rem;
  border-radius: 12px;
}
.faq-nav-link:hover, .faq-nav-link.active {
  color: var(--text);
  background: rgba(255,255,255,0.04);
}
.faq-content-wrap { min-width: 0; }
.markdown-surface {
  padding: 1.5rem;
}
.loading-surface { min-height: 200px; }
.loading { margin: 0; }
.markdown-surface h1, .markdown-surface h2, .markdown-surface h3 {
  line-height: 1.15;
  letter-spacing: -0.03em;
}
.markdown-surface h1 {
  font-size: 1.8rem;
  margin: 0 0 1rem;
}
.markdown-surface h2 {
  font-size: 1.22rem;
  margin: 1.6rem 0 0.6rem;
  padding-top: 1.25rem;
  border-top: 1px solid rgba(255,255,255,0.08);
  scroll-margin-top: calc(var(--header-h) + 24px);
}
.markdown-surface h2:first-child {
  margin-top: 0;
  padding-top: 0;
  border-top: 0;
}
.markdown-surface h3 {
  font-size: 1.02rem;
  margin: 1.2rem 0 0.45rem;
}
.markdown-surface pre {
  overflow: auto;
  padding: 1rem;
  border-radius: 14px;
  background: rgba(0,0,0,0.26);
  border: 1px solid rgba(255,255,255,0.06);
}
.markdown-surface ul { padding-left: 1.25rem; }
.markdown-surface a {
  color: #dff7ff;
  text-decoration: underline;
  text-underline-offset: 0.18em;
}
.privacy-copy { max-width: 860px; }
@media (max-width: 1040px) {
  .hero-grid, .split-layout, .faq-shell { grid-template-columns: 1fr; }
  .faq-sidebar {
    position: relative;
    top: 0;
  }
}
@media (max-width: 900px) {
  .quick-grid, .feature-grid, .gallery-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 680px) {
  .site-header-inner, .page-shell, .faq-shell { padding-left: 1rem; padding-right: 1rem; }
  .topnav { gap: 0.1rem; }
  .topnav a { padding: 0.6rem 0.7rem; font-size: 0.9rem; }
  .hero-actions { flex-direction: column; }
  .button { width: 100%; }
  .quick-grid, .feature-grid, .gallery-grid { grid-template-columns: 1fr; }
  .brand-copy small { display: none; }
}