:root {
  color-scheme: dark;
  --bg: #0d0d12;
  --panel: #171723;
  --panel-strong: #1d1d2b;
  --text: #f4f1e8;
  --muted: #c9c4b6;
  --quiet: #969184;
  --gold: #d4ad48;
  --blue: #99a9ff;
  --line: rgba(244, 241, 232, 0.14);
  --shadow: 0 22px 60px rgba(0, 0, 0, 0.28);
  --content-width: 1120px;
  --section-gap: 32px;
  --card-gap: 24px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-width: 320px;
  background:
    radial-gradient(circle at 18% 0%, rgba(108, 99, 255, 0.14), transparent 34rem),
    radial-gradient(circle at 84% 16%, rgba(212, 173, 72, 0.09), transparent 28rem),
    var(--bg);
  color: var(--text);
  font-family: Barlow, Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.7;
}

a { color: var(--blue); }
a:hover { color: #c4ccff; }
a:focus-visible, button:focus-visible { outline: 3px solid var(--gold); outline-offset: 4px; }
button, input, select, textarea { font: inherit; }

.site-shell, .content-shell { width: min(var(--content-width), calc(100% - 32px)); margin-inline: auto; }

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 22px 0;
}

.brand {
  color: var(--text);
  font-size: 0.92rem;
  font-weight: 800;
  letter-spacing: 0.22em;
  text-decoration: none;
  text-transform: uppercase;
}

.site-nav { display: flex; flex-wrap: wrap; align-items: center; justify-content: flex-end; gap: 8px 16px; }
.site-nav a { display: inline-flex; min-height: 44px; align-items: center; color: var(--muted); font-weight: 650; text-decoration: none; }
.site-nav a[aria-current="page"] { color: var(--gold); }
.site-nav .play-link { min-height: 48px; margin-left: 4px; }

.play-link, .button-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 10px 20px;
  border: 1px solid var(--gold);
  border-radius: 999px;
  background: var(--gold);
  color: #17130d !important;
  font-weight: 800;
  text-decoration: none;
}

main { padding: 18px 0 72px; }
.hero { padding: clamp(30px, 7vw, 76px) 0 38px; }
.eyebrow { color: var(--gold); font-size: 0.78rem; font-weight: 800; letter-spacing: 0.18em; text-transform: uppercase; }
h1, h2, h3 { line-height: 1.16; }
h1 { max-width: 880px; margin: 12px 0 20px; font-size: clamp(2.4rem, 7vw, 5.4rem); letter-spacing: -0.04em; }
h2 { margin-top: 0; color: var(--gold); font-size: clamp(1.45rem, 3vw, 2.2rem); }
h3 { margin-bottom: 8px; color: var(--text); font-size: 1.12rem; }
p, li { color: var(--muted); }
.lede { max-width: 780px; font-size: clamp(1.06rem, 2vw, 1.26rem); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 28px; }
.text-link { display: inline-flex; min-height: 48px; align-items: center; font-weight: 700; }

.panel, .content-section, .toc, .role-card, .faq-item, figure,
.table-of-contents, .info-card, .example-card {
  border: 1px solid var(--line);
  border-radius: 20px;
  background: rgba(23, 23, 35, 0.93);
  box-shadow: var(--shadow);
}

.content-section, .toc, figure { margin: var(--section-gap) 0; padding: clamp(20px, 4vw, 34px); }
.content-section > :first-child, .toc > :first-child { margin-top: 0; }
.content-section > :last-child, .toc > :last-child { margin-bottom: 0; }

.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 260px), 1fr)); gap: var(--card-gap); }
.panel { padding: 22px; }
.panel h3 { margin-top: 0; }
.panel p:last-child { margin-bottom: 0; }

.toc ul, .check-list, .phase-list { padding-left: 1.2rem; }
.toc li, .check-list li, .phase-list li { margin: 0.42rem 0; }

figure { text-align: center; }
figure img { display: block; width: min(100%, 780px); height: auto; margin: 0 auto; }
figcaption { max-width: 780px; margin: 16px auto 0; color: var(--quiet); font-size: 0.94rem; }

.comparison { width: 100%; border-collapse: collapse; margin: 18px 0; }
.comparison th, .comparison td { border: 1px solid var(--line); padding: 12px; text-align: left; vertical-align: top; }
.comparison th { color: var(--gold); background: var(--panel-strong); }

.role-grid { display: grid; gap: var(--card-gap); margin-top: var(--card-gap); }
.role-card { padding: 22px; }
.role-card h3 { margin-top: 0; color: var(--gold); }
.role-card dl { display: grid; grid-template-columns: minmax(110px, 0.3fr) 1fr; gap: 6px 14px; margin-bottom: 0; }
.role-card dl > div { display: contents; }
.role-card dt { color: var(--text); font-weight: 750; }
.role-card dd { margin: 0; color: var(--muted); }

.stat-glossary { margin: 0; }
.stat-glossary dt { color: var(--text); font-weight: 750; margin-top: 16px; }
.stat-glossary dt:first-of-type { margin-top: 0; }
.stat-glossary dd { margin: 4px 0 0; color: var(--muted); line-height: 1.55; }

.faq-list { display: grid; gap: 14px; }
.faq-item { padding: 20px; }
.faq-item h3 { margin-top: 0; }

.skip-link {
  position: fixed;
  z-index: 20;
  top: 10px;
  left: 10px;
  transform: translateY(-160%);
  border-radius: 10px;
  background: var(--gold);
  color: #17130d;
  font-weight: 800;
  padding: 10px 14px;
}
.skip-link:focus { transform: translateY(0); }

.site-main article > section,
.site-main article > aside { margin-top: var(--section-gap); }
.hero.panel { padding: clamp(34px, 6vw, 68px); }
.hero.panel h1 { font-size: clamp(2.3rem, 5vw, 4.4rem); }
.section-heading { padding: clamp(22px, 4vw, 34px); }
.section-heading > :last-child { margin-bottom: 0; }
.next-steps { padding: clamp(22px, 4vw, 34px); }

.article-hero {
  padding: clamp(34px, 6vw, 68px) 0 38px;
  border-bottom: 1px solid var(--line);
}
.article-hero h1 { max-width: 920px; font-size: clamp(2.45rem, 6vw, 4.8rem); }
.article-summary { max-width: 820px; color: var(--muted); font-size: clamp(1.06rem, 2vw, 1.24rem); }
.article-meta { display: flex; flex-wrap: wrap; gap: 8px 20px; margin-top: 24px; color: var(--quiet); font-size: 0.92rem; }
.article-layout { display: grid; grid-template-columns: minmax(220px, 260px) minmax(0, 1fr); gap: var(--section-gap); align-items: start; margin-top: var(--section-gap); }
.article-content { min-width: 0; }
.article-content > .content-section:first-child { margin-top: 0; }
.table-of-contents { position: sticky; top: 24px; padding: 22px; }
.table-of-contents h2 { font-size: 1.15rem; }
.table-of-contents ol { margin: 0; padding-left: 1.2rem; }
.table-of-contents li { margin: 0.45rem 0; }
.info-grid, .example-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 220px), 1fr)); gap: var(--card-gap); margin: 24px 0; }
.info-card, .example-card { padding: 20px; }
.info-card > :first-child, .example-card > :first-child { margin-top: 0; }
.info-card > :last-child, .example-card > :last-child { margin-bottom: 0; }

.utility-main > * { margin-block: 0; }
.utility-main > * + * { margin-top: var(--section-gap); }
.utility-main .grid { margin: 0; }
.privacy-card-grid { gap: clamp(28px, 4vw, 40px); }
.utility-main > .privacy-card-grid { margin-top: clamp(28px, 4vw, 40px); }
.utility-main .panel:not(.hero) { padding: clamp(22px, 4vw, 34px); }
.utility-main ul { padding-left: 1.2rem; }
.utility-main .hero { margin: 0; }
.utility-main form { display: grid; gap: 14px; margin-top: 18px; }
.utility-main .field { display: grid; gap: 6px; }
.utility-main label { color: var(--text); font-weight: 700; }
.utility-main input, .utility-main select, .utility-main textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--panel-strong);
  color: var(--text);
  padding: 12px 14px;
}
.utility-main textarea { min-height: 144px; resize: vertical; }
.utility-main button {
  min-height: 48px;
  border: 0;
  border-radius: 999px;
  background: var(--gold);
  color: #17130d;
  cursor: pointer;
  font-weight: 800;
  padding: 12px 18px;
}
.utility-main button:disabled { cursor: wait; opacity: 0.65; }
.status { min-height: 28px; font-weight: 650; }
.status[data-tone="success"] { color: #67c28b; }
.status[data-tone="error"] { color: #de6d67; }

.guide-ad {
  width: 100%;
  min-height: 132px;
  margin: 64px auto;
  padding: 18px;
  border-block: 1px solid var(--line);
  background: rgba(13, 13, 18, 0.5);
  text-align: center;
}
.guide-ad__label { display: block; margin-bottom: 10px; color: var(--quiet); font-size: 0.72rem; letter-spacing: 0.14em; text-transform: uppercase; }
.guide-ad .adsbygoogle { display: block; width: 100%; min-height: 96px; }

.byline, .content-note { color: var(--quiet); font-size: 0.92rem; }
.callout { border-left: 4px solid var(--gold); padding: 4px 0 4px 18px; }

.site-footer {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  justify-content: space-between;
  padding: 28px 0 44px;
  border-top: 1px solid var(--line);
  color: var(--quiet);
  font-size: 0.9rem;
}
.site-footer nav { display: flex; flex-wrap: wrap; gap: 12px 18px; }
.site-footer p { margin: 0; }
.site-footer-links { display: flex; flex-wrap: wrap; gap: 12px 18px; }

@media (min-width: 820px) {
  .role-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .guide-ad { min-height: 286px; padding-block: 22px; }
  .guide-ad .adsbygoogle { min-height: 250px; }
}

@media (max-width: 819px) {
  .site-header { align-items: flex-start; flex-direction: column; }
  .site-nav { width: 100%; justify-content: flex-start; gap: 6px 14px; }
  .site-nav .play-link { width: 100%; margin: 4px 0 0; }
  .article-layout { grid-template-columns: 1fr; gap: 0; }
  .table-of-contents { position: static; margin-bottom: var(--section-gap); }
  .comparison { font-size: 0.9rem; }
  .role-card dl { grid-template-columns: 1fr; }
  .role-card dd { margin-bottom: 8px; }
}

@media (max-width: 520px) {
  :root { --section-gap: 24px; --card-gap: 20px; }
  .site-header { padding: 18px 0; }
  .site-nav { column-gap: 12px; }
  .site-nav a { min-height: 40px; }
  h1 { font-size: clamp(2.25rem, 12vw, 3.6rem); }
  .article-hero h1, .hero.panel h1 { font-size: clamp(2.15rem, 11vw, 3.35rem); }
}

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