:root {
  --ds-ink: #242327;
  --ds-ink-soft: #49474f;
  --ds-muted: #66616d;
  --ds-paper: #faf9f5;
  --ds-paper-soft: #efebf8;
  --ds-line: #dedbd5;
  --ds-accent: #653fd3;
  --ds-accent-ink: #ffffff;
  --ds-warn: #83501b;
  --ds-ok: #476719;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 24px; }
body { margin: 0; font-family: "Segoe UI", Arial, Helvetica, sans-serif; }
h2 { font-size: clamp(1.95rem, 2.6vw, 2.25rem); }
button, input, select { font: inherit; }
button, a, input { -webkit-tap-highlight-color: transparent; }
button { color: var(--ds-ink); }
[hidden] { display: none !important; }
img, svg { max-width: 100%; }
p { max-width: 68ch; }
section[id] { scroll-margin-top: 24px; }
::selection { color: var(--ds-ink); background: var(--ds-paper-soft); }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
.skip-link { position: absolute; top: -100px; left: 16px; z-index: 20; background: var(--ds-ink); color: var(--ds-paper); padding: 12px 18px; }
.skip-link:focus { top: 12px; }
.site-header { border-bottom: 1px solid var(--ds-line); background: var(--ds-paper); }
.header-inner { min-height: 92px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { color: var(--ds-ink); text-decoration: none; display: inline-flex; align-items: center; gap: 11px; font-weight: 800; white-space: nowrap; letter-spacing: -.04em; }
.brand-name { font-size: inherit; }
.brand-icon { width: 36px; height: 36px; display: grid; place-items: center; background: var(--ds-ink); color: var(--ds-paper); clip-path: polygon(29% 0, 71% 0, 100% 29%, 100% 71%, 71% 100%, 29% 100%, 0 71%, 0 29%); font-weight: 900; }
.primary-nav { display: flex; align-items: center; flex-wrap: wrap; gap: 28px; }
.primary-nav a { color: var(--ds-ink-soft); text-decoration: none; font-size: var(--ds-font-small); font-weight: 600; min-height: 44px; display: inline-flex; align-items: center; }
.primary-nav a:hover, .primary-nav a[aria-current="page"] { color: var(--ds-accent); }
.primary-nav .nav-cta { padding: 0 18px; border: 1px solid var(--ds-line); border-radius: var(--ds-radius-sm); color: var(--ds-ink); }
.header-inner > .nav-cta { min-height: 44px; display: inline-flex; align-items: center; padding: 0 18px; border: 1px solid var(--ds-line); border-radius: var(--ds-radius-sm); color: var(--ds-ink); text-decoration: none; font-size: var(--ds-font-small); font-weight: 650; }
.hero { padding-block: 64px 56px; }
.hero-grid { display: grid; grid-template-columns: 1.18fr .82fr; align-items: center; gap: 62px; }
.eyebrow, .section-kicker, .panel-kicker { display: block; font-size: var(--ds-font-small); text-transform: uppercase; letter-spacing: .13em; font-weight: 700; color: var(--ds-accent); margin: 0 0 20px; }
.eyebrow::before, .section-kicker::before { content: ""; display: inline-block; width: 25px; height: 2px; margin-right: 10px; background: var(--ds-accent); vertical-align: middle; }
.hero-title { max-width: 12ch; letter-spacing: -.045em; }
.hero-title span { color: var(--ds-accent); }
.lead { color: var(--ds-ink-soft); margin: 22px 0 24px; }
.actions, .button-row { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; }
.ds-btn { transition: background .15s, transform .15s; }
.ds-btn:hover { transform: translateY(-1px); text-decoration-thickness: 1px; }
.ds-btn--primary:hover { background: color-mix(in srgb, var(--ds-accent) 85%, var(--ds-ink)); }
.ds-btn--ghost:hover { background: var(--ds-paper-soft); }
.trust-row { display: flex; flex-wrap: wrap; gap: 10px 18px; margin-top: 23px; font-size: var(--ds-font-small); color: var(--ds-muted); }
.trust-row span::before { content: "✓"; margin-right: 6px; color: var(--ds-ok); font-weight: 800; }
.hero-panel { position: relative; isolation: isolate; background: var(--ds-paper-soft); border: 1px solid color-mix(in srgb, var(--ds-accent) 28%, var(--ds-paper)); border-radius: 16px; padding: 32px; overflow: hidden; }
.hero-panel::after { content: ""; position: absolute; z-index: -1; right: -70px; top: -65px; width: 220px; height: 220px; border: 24px solid color-mix(in srgb, var(--ds-accent) 7%, var(--ds-paper-soft)); transform: rotate(25deg); clip-path: polygon(29% 0, 71% 0, 100% 29%, 100% 71%, 71% 100%, 29% 100%, 0 71%, 0 29%); }
.hero-panel .panel-kicker { margin-bottom: 32px; color: var(--ds-ink-soft); }
.hero-panel .panel-kicker:has(span) { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px; }
.code-feature { font-family: Consolas, "Courier New", monospace; font-size: clamp(1.55rem, 2.6vw, 2.25rem); font-weight: 800; line-height: 1.3; letter-spacing: -.04em; overflow-wrap: anywhere; margin: 16px 0 8px; }
.reward { font-weight: 600; color: var(--ds-ink-soft); }
.status-pill, .chip { display: inline-flex; align-items: center; gap: 7px; font-size: var(--ds-font-small); font-weight: 600; line-height: 1.5; padding: 5px 10px; border-radius: 100px; background: color-mix(in srgb, var(--ds-ok) 14%, var(--ds-paper)); color: var(--ds-ok); }
.status-pill::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: currentColor; }
.panel-footnote { border-top: 1px solid color-mix(in srgb, var(--ds-accent) 20%, var(--ds-paper)); padding-top: 18px; margin: 23px 0 0; font-size: var(--ds-font-small); color: var(--ds-ink-soft); }
.hero-panel .ds-btn { width: 100%; margin-top: 14px; }
.section-heading { display: flex; justify-content: space-between; align-items: end; gap: 28px; margin-bottom: 28px; }
.section-heading h2 { margin: 0; max-width: 24ch; }
.section-kicker { margin-bottom: 12px; }
.section-note { color: var(--ds-muted); font-size: var(--ds-font-small); margin: 0; max-width: 36ch; }
.content-layout { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 30px; align-items: start; }
.content-layout > *, .hero-grid > *, .article-layout > * { min-width: 0; }
.code-toolbar { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 16px; margin-bottom: 18px; }
.filter-group { display: flex; gap: 4px; flex-wrap: wrap; padding: 4px; background: color-mix(in srgb, var(--ds-line) 40%, var(--ds-paper)); border-radius: var(--ds-radius-sm); }
.filter-btn { border: 0; padding: 8px 13px; border-radius: 4px; font-size: var(--ds-font-small); font-weight: 600; min-height: 40px; background: transparent; cursor: pointer; }
.filter-btn[aria-pressed="true"] { color: var(--ds-accent-ink); background: var(--ds-ink); }
.search-field { display: grid; flex: 1 1 180px; gap: 6px; }
.search-field > span { font-size: var(--ds-font-small); font-weight: 600; }
.search-field input, input#code-search { width: 100%; min-height: 48px; border: 1px solid var(--ds-line); border-radius: var(--ds-radius-sm); background: var(--ds-paper); color: var(--ds-ink); padding: 10px 14px; }
input::placeholder { color: var(--ds-muted); opacity: 1; }
.code-list { display: grid; gap: 18px; }
.code-card { padding: 25px; border: 1px solid var(--ds-line); border-left: 4px solid var(--ds-accent); border-radius: var(--ds-radius); background: var(--ds-paper); }
.code-topline { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; }
.code-value { font-family: Consolas, "Courier New", monospace; font-weight: 800; letter-spacing: -.025em; overflow-wrap: anywhere; }
.code-topline .code-value { margin: 0; }
.code-reward { margin: 12px 0 0; font-weight: 600; }
.code-meta { display: flex; flex-wrap: wrap; gap: 4px 16px; margin: 10px 0 0; color: var(--ds-muted); font-size: var(--ds-font-small); }
.code-details { border-top: 1px solid var(--ds-line); margin-top: 18px; padding-top: 15px; }
.code-details p { margin-bottom: 10px; }
.code-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; margin-top: 20px; }
.copy-btn { background: var(--ds-accent); color: var(--ds-accent-ink); border: 0; border-radius: var(--ds-radius-sm); padding: 11px 19px; min-height: 46px; cursor: pointer; font-weight: 650; }
[data-mark-code], [data-reset-used] { background: transparent; border: 1px solid var(--ds-line); border-radius: var(--ds-radius-sm); padding: 10px 14px; min-height: 46px; cursor: pointer; font-size: var(--ds-font-small); }
[data-mark-code][aria-pressed="true"] { background: color-mix(in srgb, var(--ds-ok) 12%, var(--ds-paper)); border-color: var(--ds-ok); color: var(--ds-ok); }
#copy-status:not(:empty) { padding: 10px 14px; margin-top: 12px; border-left: 3px solid var(--ds-accent); background: var(--ds-paper-soft); }
#code-count { color: var(--ds-muted); font-size: var(--ds-font-small); }
#empty-results { padding: 24px; border: 1px dashed var(--ds-line); border-radius: var(--ds-radius); }
.sidebar { display: grid; gap: 20px; }
.sidebar.ds-card { grid-template-columns: 1fr; gap: 0; }
.sidebar .ds-card, .article-aside .ds-card { background: var(--ds-paper-soft); }
.sidebar p:last-child, .ds-card p:last-child { margin-bottom: 0; }
.sidebar h3 { margin-bottom: 16px; }
.sidebar ul { margin: 0; }
.notice, .callout { border-left: 3px solid var(--ds-accent); background: var(--ds-paper-soft); padding: 20px 24px; border-radius: 0 var(--ds-radius-sm) var(--ds-radius-sm) 0; margin-block: 24px; }
.notice p:last-child, .callout p:last-child { margin: 0; }
.guide-grid, .related-grid, .stats-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 22px; }
.guide-card { border-top: 2px solid var(--ds-ink); padding: 25px 0 0; }
.step-number { display: inline-flex; align-items: center; justify-content: center; width: 40px; height: 40px; margin-bottom: 20px; background: var(--ds-paper-soft); color: var(--ds-accent); border-radius: 50%; font-weight: 700; }
.guide-card h3 { margin-bottom: 12px; }
.guide-card p { color: var(--ds-ink-soft); }
.steps li { padding-left: 8px; margin-block: 15px; }
.steps li::marker { color: var(--ds-accent); font-weight: 700; }
.table-wrap { overflow-x: auto; border: 1px solid var(--ds-line); border-radius: var(--ds-radius); }
.comparison-table, .table-wrap table { width: 100%; border-collapse: collapse; text-align: left; }
.comparison-table caption, .table-wrap caption { padding: 16px 20px; text-align: left; font-weight: 600; }
.comparison-table th, .comparison-table td, .table-wrap th, .table-wrap td { padding: 17px 20px; border-bottom: 1px solid var(--ds-line); vertical-align: top; min-width: 145px; }
.comparison-table th, .table-wrap th { background: var(--ds-paper-soft); font-weight: 650; }
.comparison-table tr:last-child td, .table-wrap tr:last-child td { border-bottom: 0; }
.faq-list { border-top: 1px solid var(--ds-line); }
.faq-list details { border-bottom: 1px solid var(--ds-line); padding: 0; }
.faq-list summary { cursor: pointer; padding: 22px 40px 22px 0; list-style: none; font-weight: 650; position: relative; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after { content: "+"; position: absolute; right: 6px; color: var(--ds-accent); }
.faq-list details[open] summary::after { content: "−"; }
.faq-list details > p, .faq-list details > div { margin: 0 0 24px; color: var(--ds-ink-soft); max-width: 68ch; }
.related-card { display: flex; flex-direction: column; border: 1px solid var(--ds-line); border-radius: var(--ds-radius); padding: 25px; background: var(--ds-paper); color: var(--ds-ink); text-decoration: none; transition: border-color .15s; }
.related-card:hover { border-color: var(--ds-accent); }
.related-card h3 { margin-block: 14px 12px; }
.related-card p { color: var(--ds-ink-soft); margin-bottom: 20px; }
.related-card .read-link { color: var(--ds-accent); margin-top: auto; font-weight: 650; }
.page-hero { padding-block: 42px 48px; border-bottom: 1px solid var(--ds-line); }
.page-hero h1 { max-width: 19ch; }
.breadcrumbs { display: flex; flex-wrap: wrap; gap: 8px; font-size: var(--ds-font-small); color: var(--ds-muted); margin-bottom: 28px; }
.breadcrumbs a { color: var(--ds-muted); }
.article-layout { display: grid; grid-template-columns: minmax(0, 1fr) 260px; gap: 64px; align-items: start; padding-block: var(--ds-space-lg); }
.article-body { max-width: 68ch; }
.article-body > section { margin-bottom: 48px; }
.article-body h2 { margin-top: 44px; }
.article-body h3 { margin-top: 28px; }
.article-body > :first-child, .article-body > section:first-child > h2 { margin-top: 0; }
.article-aside { display: grid; gap: 24px; }
.toc { padding: 24px; border: 1px solid var(--ds-line); border-radius: var(--ds-radius); }
.toc ul { padding-left: 18px; margin-bottom: 0; }
.toc a { color: var(--ds-ink-soft); }
.source-list { padding-left: 22px; }
.source-list li { padding-left: 4px; margin-block: 16px; }
.source-list a { overflow-wrap: anywhere; }
.stat { padding: 22px; border: 1px solid var(--ds-line); border-radius: var(--ds-radius); }
.stat strong { display: block; color: var(--ds-accent); }
.stat span { color: var(--ds-muted); font-size: var(--ds-font-small); }
.site-footer { margin-top: 24px; background: color-mix(in srgb, var(--ds-line) 20%, var(--ds-paper)); }
.site-footer .ds-wrap > p:first-child { margin: 0; font-size: var(--ds-font-small); }
.site-footer nav a { display: inline-flex; align-items: center; min-height: 36px; font-size: var(--ds-font-small); }
.site-footer .ds-fineprint { font-size: var(--ds-font-small); max-width: none; }

@media (min-width: 1100px) {
  h1 { font-size: clamp(2.1rem, 4.3vw, 3.5rem); }
}
@media (max-width: 960px) {
  .hero-grid { gap: 30px; }
  .hero-panel { padding: 25px; }
  .content-layout { grid-template-columns: minmax(0, 1fr) 250px; gap: 24px; }
  .primary-nav { gap: 18px; }
  .article-layout { grid-template-columns: minmax(0, 1fr) 220px; gap: 32px; }
}
@media (max-width: 760px) {
  .header-inner { flex-wrap: wrap; padding-block: 18px; gap: 10px; }
  .primary-nav { width: 100%; justify-content: space-between; gap: 8px; }
  .primary-nav .nav-cta { padding-inline: 12px; }
  .hero { padding-block: 38px; }
  .hero-grid, .content-layout, .article-layout { grid-template-columns: 1fr; gap: 30px; }
  .hero-title { max-width: 15ch; }
  .hero-panel { max-width: 520px; width: 100%; }
  .section-heading { align-items: start; flex-direction: column; gap: 14px; }
  .section-note { max-width: 68ch; }
  .sidebar { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .guide-grid, .related-grid { grid-template-columns: 1fr; gap: 22px; }
  .guide-card { display: block; }
  .guide-card .step-number { margin-bottom: 16px; }
  .article-aside { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .page-hero { padding-block: 30px 36px; }
}
@media (max-width: 640px) {
  h1 { font-size: clamp(2.1rem, 8vw, 2.4rem); }
  h2 { font-size: clamp(1.95rem, 6vw, 2.25rem); }
  .hero-title { max-width: 14ch; }
  .eyebrow, .section-kicker { letter-spacing: .09em; }
  .actions { align-items: stretch; }
  .actions .ds-btn { width: 100%; }
  .hero-panel .panel-kicker { margin-bottom: 22px; }
  .hero-panel { padding: 24px; }
  .sidebar, .article-aside, .stats-grid { grid-template-columns: 1fr; }
  .code-toolbar { align-items: stretch; }
  .filter-group, .search-field { width: 100%; flex-basis: 100%; }
  .filter-group { justify-content: space-between; }
  .filter-btn { flex: 1; padding-inline: 8px; }
  .code-card { padding: 21px; }
  .code-actions > button { width: 100%; }
  .notice, .callout { padding: 18px; }
  .site-footer .ds-wrap { gap: 16px; }
  .site-footer nav { gap: 4px 18px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}