:root {
  color-scheme: dark;
  --bg: #08090b;
  --surface: #0d0f12;
  --surface-2: #121419;
  --line: rgba(255,255,255,0.095);
  --line-soft: rgba(255,255,255,0.06);
  --text: #f3f4f6;
  --muted: #a5a7ad;
  --faint: #757981;
  --accent: #f5a623;
  --accent-soft: rgba(245,166,35,0.13);
  --ok: #4ade80;
  --radius: 18px;
  --font-sans: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-serif: "Source Serif 4", Georgia, serif;
  --font-mono: "SF Mono", "Roboto Mono", ui-monospace, monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  background:
    radial-gradient(circle at top left, rgba(245,166,35,0.09), transparent 34rem),
    linear-gradient(180deg, #0a0b0d 0%, #060708 100%);
  color: var(--text);
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
a:hover { color: var(--accent); }
.container { width: min(1080px, calc(100% - 40px)); margin: 0 auto; }
.nav {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(18px);
  background: rgba(8,9,11,0.78);
  border-bottom: 1px solid var(--line-soft);
}
.nav-inner { height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 500; letter-spacing: -0.02em; }
.brand img { width: 28px; height: 28px; border-radius: 7px; }
.nav-links { display: flex; align-items: center; gap: 18px; color: var(--muted); font-size: 14px; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  padding: 0 16px;
  border-radius: 999px;
  border: 1px solid var(--line);
  color: var(--text);
  background: rgba(255,255,255,0.03);
  font-size: 14px;
  font-weight: 500;
}
.btn.primary {
  background: var(--accent-soft);
  border-color: rgba(245,166,35,0.45);
  color: var(--accent);
}
.hero { padding: 86px 0 40px; }
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid rgba(245,166,35,0.2);
  border-radius: 999px;
  padding: 7px 12px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: 22px;
}
h1 {
  max-width: 940px;
  font-size: clamp(42px, 7vw, 78px);
  line-height: 0.98;
  letter-spacing: -0.045em;
  font-weight: 500;
}
.lead {
  max-width: 760px;
  margin-top: 24px;
  color: var(--muted);
  font-size: clamp(18px, 2.2vw, 22px);
  line-height: 1.55;
}
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 32px; }
.meta-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 26px;
  color: var(--faint);
  font-size: 13px;
}
.meta-row span { display: inline-flex; align-items: center; gap: 8px; }
.dot { width: 6px; height: 6px; border-radius: 50%; background: var(--ok); }
.layout { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 56px; align-items: start; padding: 42px 0 88px; }
article {
  max-width: 820px;
}
.toc {
  position: sticky;
  top: 96px;
  background: rgba(18,20,25,0.72);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
}
.toc h2 { font-size: 12px; color: var(--faint); text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 12px; }
.toc a { display: block; color: var(--muted); font-size: 14px; line-height: 1.45; padding: 8px 0; border-top: 1px solid var(--line-soft); }
.toc a:first-of-type { border-top: 0; }
article h2 {
  margin-top: 56px;
  margin-bottom: 16px;
  font-size: clamp(28px, 4vw, 40px);
  line-height: 1.08;
  letter-spacing: -0.035em;
  font-weight: 500;
}
article h3 {
  margin-top: 34px;
  margin-bottom: 12px;
  font-size: 21px;
  line-height: 1.25;
  font-weight: 500;
  letter-spacing: -0.02em;
}
article p, article li {
  color: var(--muted);
  font-size: 17px;
  line-height: 1.75;
}
article p + p { margin-top: 14px; }
article ul, article ol { margin: 16px 0 0 22px; }
article li + li { margin-top: 8px; }
article strong { color: var(--text); font-weight: 500; }
.notice, .step, .compare-card, .faq-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(18,20,25,0.72);
}
.notice { padding: 22px 24px; margin: 30px 0; }
.notice p { font-size: 15px; line-height: 1.65; }
.notice strong { color: var(--accent); }
.step { padding: 24px; margin-top: 18px; }
.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 13px;
  margin-bottom: 12px;
}
.checklist { list-style: none; margin-left: 0; }
.checklist li { position: relative; padding-left: 28px; }
.checklist li::before { content: "✓"; position: absolute; left: 0; color: var(--accent); }
.code {
  font-family: var(--font-mono);
  font-size: 14px;
  color: #d9dadf;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--line-soft);
  border-radius: 10px;
  padding: 2px 7px;
}
.comparison {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-top: 20px;
}
.compare-card { padding: 22px; }
.compare-card h3 { margin-top: 0; }
.compare-card .label {
  display: inline-block;
  color: var(--accent);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 12px;
}
.table-wrap { overflow-x: auto; margin: 22px 0; border: 1px solid var(--line); border-radius: var(--radius); }
table { width: 100%; border-collapse: collapse; min-width: 760px; background: rgba(18,20,25,0.66); }
th, td { padding: 15px 16px; border-bottom: 1px solid var(--line-soft); text-align: left; vertical-align: top; font-size: 14px; line-height: 1.55; color: var(--muted); }
th { color: var(--text); font-weight: 500; background: rgba(255,255,255,0.03); }
tr:last-child td { border-bottom: 0; }
.table-note {
  margin-top: 12px;
  color: var(--faint);
  font-size: 13px;
  line-height: 1.6;
}
.guide-group + .guide-group { margin-top: 34px; }
.guide-group .comparison {
  margin-top: 16px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
.hero-shot,
.shot {
  margin: 28px 0 0;
  border: 1px solid var(--line);
  border-radius: 24px;
  overflow: hidden;
  background: rgba(18,20,25,0.72);
}
.hero-shot img,
.shot img {
  display: block;
  width: 100%;
  height: auto;
}
.hero-shot figcaption,
.shot figcaption {
  padding: 14px 16px 16px;
  color: var(--faint);
  font-size: 13px;
  line-height: 1.6;
}
.pill-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}
.pill {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0 12px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.03);
  color: var(--muted);
  font-size: 13px;
}
.source-list,
.link-list {
  list-style: none;
  margin-left: 0;
}
.source-list li,
.link-list li {
  position: relative;
  padding-left: 18px;
}
.source-list li::before,
.link-list li::before {
  content: "↗";
  position: absolute;
  left: 0;
  color: var(--accent);
}
.source-list a,
.link-list a {
  color: var(--text);
}
.split {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 18px;
}
.mini-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(18,20,25,0.58);
  padding: 20px;
}
.mini-card h3,
.mini-card h4 {
  margin-top: 0;
}
.mini-card p {
  font-size: 15px;
  line-height: 1.7;
}
.eyebrow-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--accent);
  font-size: 13px;
  margin-top: 18px;
}
.cta {
  margin-top: 56px;
  padding: 34px;
  border-radius: 24px;
  border: 1px solid rgba(245,166,35,0.24);
  background: linear-gradient(135deg, rgba(245,166,35,0.12), rgba(255,255,255,0.03));
}
.cta h2 { margin-top: 0; }
.footer {
  border-top: 1px solid var(--line-soft);
  padding: 34px 0;
  color: var(--faint);
  font-size: 13px;
}
.footer-inner { display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap; }
.footer-links { display: flex; gap: 14px; flex-wrap: wrap; }
@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; gap: 28px; }
  .toc { position: static; }
  .comparison { grid-template-columns: 1fr; }
  .guide-group .comparison { grid-template-columns: 1fr; }
  .split { grid-template-columns: 1fr; }
  .nav-links a:not(.btn) { display: none; }
}