:root {
  --bg: #10131f;
  --bg-soft: #171b2a;
  --panel: #1d2335;
  --panel-2: #22283b;
  --text: #f4f7fb;
  --muted: #b5bfd2;
  --line: #343d56;
  --brand: #8b5cf6;
  --brand-2: #22d3ee;
  --gold: #f6c65b;
  --ok: #4ade80;
  --warn: #f97316;
  --danger: #fb7185;
  --shadow: 0 18px 50px rgba(0, 0, 0, .28);
}
* { box-sizing: border-box; }
html { color-scheme: dark; scroll-behavior: smooth; }
body {
  margin: 0;
  background:
    linear-gradient(180deg, rgba(34, 211, 238, .08), transparent 420px),
    linear-gradient(135deg, #10131f 0%, #151827 48%, #111827 100%);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.65;
}
a { color: inherit; }
img { max-width: 100%; display: block; }
.skip-link {
  position: absolute;
  left: 16px;
  top: -80px;
  background: var(--gold);
  color: #1b1608;
  padding: 10px 14px;
  z-index: 100;
  border-radius: 6px;
}
.skip-link:focus { top: 16px; }
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 14px clamp(16px, 4vw, 48px);
  background: rgba(16, 19, 31, .92);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-weight: 800;
  white-space: nowrap;
}
.brand svg {
  width: 32px;
  height: 32px;
  fill: var(--gold);
}
.site-header nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px 16px;
}
.site-header nav a,
.site-footer nav a,
.text-link {
  color: var(--muted);
  text-decoration: none;
  font-weight: 650;
  font-size: 14px;
}
.site-header nav a:hover,
.site-footer nav a:hover,
.text-link:hover { color: var(--text); }
main {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
}
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  padding-top: 18px;
  color: var(--muted);
  font-size: 13px;
}
.breadcrumb a {
  color: var(--brand-2);
  text-decoration: none;
  font-weight: 750;
}
.hero {
  min-height: 520px;
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(300px, .92fr);
  gap: clamp(24px, 5vw, 56px);
  align-items: center;
  padding: clamp(48px, 7vw, 88px) 0 34px;
}
.hero-copy h1 {
  margin: 12px 0 18px;
  font-size: clamp(42px, 7vw, 82px);
  line-height: .95;
  letter-spacing: 0;
}
.hero-copy p {
  max-width: 760px;
  margin: 0;
  color: var(--muted);
  font-size: clamp(17px, 2vw, 21px);
}
.kicker {
  color: var(--gold);
  text-transform: uppercase;
  letter-spacing: .08em;
  font-size: 12px;
  font-weight: 900;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}
.button {
  min-height: 46px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  text-decoration: none;
  font-weight: 800;
  transition: transform .18s ease, border-color .18s ease, background .18s ease;
}
.button:hover { transform: translateY(-1px); }
.button:focus-visible,
a:focus-visible {
  outline: 3px solid rgba(34, 211, 238, .65);
  outline-offset: 3px;
}
.button.primary {
  color: #111827;
  background: linear-gradient(135deg, var(--gold), #fde68a);
  border-color: transparent;
}
.button.secondary { background: rgba(255,255,255,.04); }
.copy-button {
  display: inline-flex;
  min-height: 38px;
  align-items: center;
  justify-content: center;
  margin-top: 10px;
  padding: 8px 12px;
  border: 1px solid rgba(74, 222, 128, .35);
  border-radius: 8px;
  background: rgba(74, 222, 128, .1);
  color: var(--text);
  cursor: pointer;
  font: inherit;
  font-weight: 850;
}
.copy-button:hover { border-color: rgba(74, 222, 128, .8); }
.hero-visual {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: linear-gradient(180deg, rgba(139, 92, 246, .18), rgba(34, 211, 238, .08));
  box-shadow: var(--shadow);
  overflow: hidden;
}
section { margin: 34px 0; }
.grid { display: grid; gap: 18px; }
.grid.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid.three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.panel,
.guide-card,
.code-card,
.timeline-item {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(29, 35, 53, .86);
  box-shadow: 0 1px 0 rgba(255,255,255,.04) inset;
}
.panel { padding: clamp(18px, 3vw, 30px); }
.panel h2,
.guide-card span,
.code-card code,
.timeline-item h2 {
  margin: 0 0 10px;
  line-height: 1.16;
}
.panel p,
.guide-card p,
.timeline-item p,
.code-card p { color: var(--muted); }
.accent-panel {
  background: linear-gradient(135deg, rgba(139, 92, 246, .2), rgba(29, 35, 53, .9));
}
.warning { border-color: rgba(249, 115, 22, .55); }
.wide { grid-column: 1 / -1; }
.content-note {
  border-color: rgba(34, 211, 238, .42);
  background: rgba(34, 211, 238, .07);
}
.fact-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: 24px 0 0;
}
.fact-list div {
  border-top: 1px solid var(--line);
  padding-top: 10px;
}
.fact-list dt { color: var(--muted); font-size: 13px; }
.fact-list dd { margin: 2px 0 0; font-weight: 800; }
.steps,
.numbered {
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}
.steps li {
  display: grid;
  grid-template-columns: 38px 1fr;
  gap: 12px;
  align-items: start;
  margin: 16px 0;
}
.steps span {
  width: 34px;
  height: 34px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  background: rgba(34, 211, 238, .14);
  color: var(--brand-2);
  font-weight: 900;
}
.steps p { margin: 0; color: var(--muted); }
.section-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 18px;
}
.section-head h2 { margin: 6px 0 0; font-size: clamp(26px, 4vw, 42px); }
.guide-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}
.guide-card {
  padding: 22px;
  text-decoration: none;
  min-height: 210px;
  transition: transform .18s ease, border-color .18s ease, background .18s ease;
}
.guide-card:hover {
  transform: translateY(-2px);
  border-color: rgba(34, 211, 238, .75);
  background: rgba(34, 211, 238, .08);
}
.guide-card svg {
  width: 34px;
  height: 34px;
  fill: none;
  stroke: var(--gold);
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  margin-bottom: 18px;
}
.guide-card span {
  display: block;
  font-size: 20px;
  font-weight: 900;
}
.guide-card p { margin: 0; }
.clean-list {
  margin: 14px 0 0;
  padding-left: 19px;
  color: var(--muted);
}
.clean-list li { margin: 8px 0; }
.mini { min-height: 180px; }
.resource-card,
.tier-card { min-height: 210px; }
.checklist-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 18px;
}
.check-item {
  display: grid;
  grid-template-columns: 28px 1fr;
  gap: 12px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255,255,255,.035);
}
.check-item span {
  width: 24px;
  height: 24px;
  border-radius: 999px;
  background: radial-gradient(circle at 35% 35%, var(--gold), var(--brand));
  box-shadow: 0 0 0 4px rgba(246, 198, 91, .12);
}
.check-item strong { display: block; }
.check-item p { margin: 4px 0 0; color: var(--muted); }
.data-table {
  width: 100%;
  margin-top: 18px;
  border-collapse: collapse;
  overflow: hidden;
  border-radius: 8px;
  font-size: 15px;
}
.data-table th,
.data-table td {
  border: 1px solid var(--line);
  padding: 12px 14px;
  text-align: left;
  vertical-align: top;
}
.data-table th {
  background: rgba(139, 92, 246, .16);
  color: var(--text);
}
.data-table td { color: var(--muted); }
.timeline {
  border-left: 1px solid var(--line);
  margin-left: 16px;
  padding-left: 20px;
}
.timeline-item {
  position: relative;
  display: grid;
  grid-template-columns: 76px 1fr;
  gap: 18px;
  padding: 22px;
  margin: 0 0 18px;
}
.timeline-item > span {
  color: var(--gold);
  font-weight: 900;
}
.code-list {
  display: grid;
  gap: 14px;
}
.code-card {
  display: grid;
  grid-template-columns: minmax(220px, .55fr) 1fr 1fr;
  gap: 18px;
  padding: 20px;
  align-items: center;
}
.code-card code {
  display: inline-block;
  color: var(--ok);
  font-size: clamp(20px, 3vw, 30px);
  font-weight: 900;
  word-break: break-word;
}
.source-note {
  display: inline-block;
  margin-top: 6px;
  color: #d6deef;
  font-size: 13px;
}
.video-card h2 { font-size: clamp(20px, 3vw, 28px); }
.video-thumb {
  position: relative;
  display: block;
  margin-bottom: 12px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  text-decoration: none;
  background: #070b14;
}
.video-thumb img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  opacity: .86;
}
.video-thumb span {
  position: absolute;
  left: 12px;
  bottom: 12px;
  display: inline-flex;
  min-height: 36px;
  align-items: center;
  padding: 8px 12px;
  border-radius: 8px;
  background: rgba(16, 19, 31, .86);
  color: var(--text);
  font-weight: 900;
}
.embed-details {
  margin: 0 0 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255,255,255,.035);
}
.embed-details summary {
  min-height: 44px;
  display: flex;
  align-items: center;
  padding: 10px 12px;
  cursor: pointer;
  color: var(--brand-2);
  font-weight: 900;
}
.embed-details .video-frame {
  margin: 0 12px 12px;
}
.video-frame {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #070b14;
  margin-bottom: 18px;
}
.video-frame iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}
.faq-list {
  display: grid;
  gap: 12px;
}
.faq-item {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(29, 35, 53, .86);
  padding: 0;
  overflow: hidden;
}
.faq-item summary {
  min-height: 58px;
  display: flex;
  align-items: center;
  padding: 16px 18px;
  cursor: pointer;
  font-weight: 900;
}
.faq-item p {
  margin: 0;
  padding: 0 18px 18px;
  color: var(--muted);
}
.related-guides { margin-top: 40px; }
.related-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}
.related-grid a {
  display: flex;
  min-height: 96px;
  flex-direction: column;
  justify-content: space-between;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255,255,255,.035);
  text-decoration: none;
  font-weight: 900;
}
.related-grid a:hover {
  border-color: rgba(34, 211, 238, .75);
  background: rgba(34, 211, 238, .08);
}
.related-grid span {
  color: var(--brand-2);
  font-size: 13px;
  font-weight: 800;
}
.source-list { padding-left: 20px; color: var(--muted); }
.source-list li { margin: 10px 0; }
.source-list a { color: var(--brand-2); }
.big-link {
  color: var(--gold);
  font-size: clamp(20px, 4vw, 32px);
  font-weight: 900;
}
.legal h2 { margin-top: 28px; }
.site-footer {
  width: min(1180px, calc(100% - 32px));
  margin: 56px auto 0;
  padding: 28px 0 44px;
  border-top: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  gap: 28px;
}
.site-footer p {
  max-width: 620px;
  color: var(--muted);
  margin: 6px 0 0;
}
.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 10px 16px;
}
@media (max-width: 900px) {
  .site-header { align-items: flex-start; flex-direction: column; }
  .site-header nav { justify-content: flex-start; }
  .hero { grid-template-columns: 1fr; min-height: auto; padding-top: 42px; }
  .hero-visual { max-width: 620px; }
  .grid.two,
  .grid.three,
  .guide-grid,
  .code-card,
  .checklist-grid,
  .related-grid { grid-template-columns: 1fr; }
  .section-head { align-items: flex-start; flex-direction: column; }
  .site-footer { flex-direction: column; }
  .site-footer nav { justify-content: flex-start; }
  .data-table {
    display: block;
    overflow-x: auto;
    white-space: nowrap;
  }
}
@media (max-width: 560px) {
  main,
  .site-footer { width: min(100% - 24px, 1180px); }
  .brand span { white-space: normal; }
  .hero-copy h1 { font-size: 42px; }
  .fact-list { grid-template-columns: 1fr; }
  .timeline-item { grid-template-columns: 1fr; }
  .hero-actions .button { width: 100%; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
}