/* Quickstart editorial layout. All colors come from the production tokens. */
.zsp-shell.zsq-shell { background: var(--zs-canvas); }
.zsq-shell > .zsp-ambient { display: none; }
.zsq-shell .zsq-main { width: min(1320px, calc(100% - 80px)); margin: 0 auto; }
.zsq-main p { font-size: 1.04rem; line-height: 1.65; color: var(--zs-text-secondary); margin: 0 0 1.25rem; max-width: 76ch; }
.zsq-main h1, .zsq-main h2, .zsq-main h3 { color: var(--zs-text-primary); }
.zsq-main h1 { font-size: 1.05rem; font-weight: 600; letter-spacing: 0; line-height: 1.5; margin: 1.4rem 0 .75rem; }
.zsq-main h2 { font-size: clamp(2rem, 3.3vw, 2.9rem); line-height: 1.12; letter-spacing: -.035em; margin: 1.15rem 0 1.2rem; }
.zsq-main h3 { font-size: 1.15rem; line-height: 1.4; margin: 0 0 .65rem; }
.zsq-hero { display: grid; grid-template-columns: minmax(0, .77fr) minmax(0, 1.23fr); align-items: center; gap: 44px; padding: 64px 0 48px; }
.zsq-hero .zsq-promise { font-size: clamp(2.7rem, 4.25vw, 3.9rem); color: var(--zs-text-primary); font-weight: 750; line-height: 1.04; letter-spacing: -.045em; margin: 0 0 1.6rem; }
.zsq-promise span { color: var(--zs-brand-accent); }
.zsq-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 22px; margin: 1.5rem 0; }
.zsq-main .zsq-note { color: var(--zs-text-muted); font-size: .88rem; line-height: 1.6; }
.zsq-contents { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 24px; padding: 22px 0; border-block: 1px solid var(--zs-divider); }
.zsq-contents span { color: var(--zs-text-muted); font: .75rem var(--zs-font-mono); }
.zsq-contents a { color: var(--zs-text-secondary); font-size: .9rem; text-decoration: none; padding: 7px 0; }
.zsq-contents a:hover { color: var(--zs-brand-accent-hover); }
.zsq-section { padding: 64px 0; border-bottom: 1px solid var(--zs-divider); }
.zsq-heading { max-width: 900px; margin-bottom: 28px; }
.zsq-figure { min-width: 0; margin: 0; }
.zsq-figure__heading { display: flex; justify-content: space-between; align-items: baseline; gap: 16px; font: 600 .78rem var(--zs-font-mono); color: var(--zs-text-secondary); padding: 13px 0; }
.zsq-inspect { white-space: nowrap; font-size: .7rem; color: var(--zs-brand-accent); }
.zsq-image-link { display: block; border: 1px solid var(--zs-border-default); border-radius: var(--zs-radius-sm); overflow: hidden; background: var(--zs-canvas-elevated); cursor: zoom-in; }
.zsq-image-link:hover { border-color: var(--zs-brand-accent); }
.zsq-image-link img { display: block; width: 100%; height: auto; object-fit: contain; }
.zsq-figure figcaption { color: var(--zs-text-muted); font-size: .83rem; line-height: 1.55; padding: 12px 0 0; }
.zsq-rail { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 28px; margin-top: 28px; padding-top: 24px; border-top: 1px solid var(--zs-divider); }
.zsq-rail > div + div { border-left: 1px solid var(--zs-divider); padding-left: 28px; }
.zsq-rail p { font-size: .95rem; margin-bottom: 0; }
.zsq-greek-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 28px 36px; margin: 32px 0; }
.zsq-greek { border-top: 1px solid var(--zs-border-strong); padding-top: 20px; }
.zsq-greek h3 { color: var(--zs-brand-accent); font-size: 1.3rem; }
.zsq-greek dl { margin: 0; }
.zsq-greek dt { color: var(--zs-text-primary); font-size: .85rem; margin-top: 12px; font-weight: 600; }
.zsq-greek dd { color: var(--zs-text-secondary); font-size: .96rem; line-height: 1.6; margin: 3px 0 0; }
.zsq-vanna { max-width: 598px; margin-bottom: 20px; }
.zsq-comparison + .zsq-comparison { margin-top: 38px; padding-top: 32px; border-top: 1px solid var(--zs-divider); }
.zsq-comparison .zsq-pair { align-items: start; }
.zsq-flow-stage { padding: 20px 0 28px; border-block: 1px solid var(--zs-divider); }
.zsq-flow-stage .zsq-figure { max-width: 606px; margin: 0 auto; }
.zsq-map > p { margin-top: 26px; }
.zsq-map > .zsq-figure { max-width: 1831px; margin-inline: auto; }
.zsq-details { border-block-end: 1px solid var(--zs-divider); }
.zsq-details summary { padding: 22px 0; cursor: pointer; color: var(--zs-text-primary); font-size: 1.05rem; font-weight: 600; }
.zsq-details summary::marker { color: var(--zs-brand-accent); }
.zsq-details[open] { padding-bottom: 24px; }
.zsq-details[open] > .zsq-note { margin: 18px 0 0; }
.zsq-greeks { margin-top: 24px; border-block-start: 1px solid var(--zs-divider); }
.zsq-glossary { display: grid; grid-template-columns: 150px 1fr; margin: 0 0 20px; font-size: .98rem; line-height: 1.6; }
.zsq-glossary dt, .zsq-glossary dd { margin: 0; padding: 10px 0; border-bottom: 1px solid var(--zs-divider); }
.zsq-glossary dt { color: var(--zs-text-primary); font-weight: 600; }
.zsq-glossary dd { color: var(--zs-text-secondary); }
.zsq-pair, .zsq-two-col { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 32px; }
.zsq-two-col { align-items: center; gap: 60px; }
.zsq-two-col > * { min-width: 0; }
.zsq-flow .zsq-figure { max-width: 606px; }
#ddoi .zsq-figure { max-width: 603px; }
.zsq-comparison > .zsq-note { margin: 20px 0 8px; }
.zsq-reading-cues { padding-left: 24px; color: var(--zs-text-secondary); line-height: 1.65; font-size: 1.02rem; margin: 22px 0; }
.zsq-reading-cues li { padding: 10px 0 10px 8px; border-bottom: 1px solid var(--zs-divider); }
.zsq-reading-cues li::marker { color: var(--zs-brand-accent); font-family: var(--zs-font-mono); }
.zsq-inline-cta { display: flex; align-items: center; justify-content: space-between; gap: 30px; padding-top: 28px; margin-top: 28px; border-top: 1px solid var(--zs-divider); }
.zsq-inline-cta p { max-width: 74ch; margin: 0; }
.zsq-inline-cta strong { display: block; color: var(--zs-text-primary); }
.zsq-inline-cta .zsp-button { flex-shrink: 0; }
.zsq-workflow { list-style: none; padding: 0; display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 26px; }
.zsq-workflow li { border-top: 2px solid var(--zs-border-strong); padding-top: 18px; }
.zsq-time { display: block; color: var(--zs-brand-accent); font: .78rem var(--zs-font-mono); margin-bottom: 18px; }
.zsq-workflow p { font-size: .96rem; }
.zsq-access { display: grid; grid-template-columns: minmax(0, 1fr) 285px; gap: 50px; }
.zsq-access .zsp-text-link { display: inline-block; margin-top: 24px; }
.zsq-mobile .zsq-figure { max-width: 250px; margin: 0 auto; }
.zsq-ending { border-bottom: 0; padding-bottom: 76px; }
.zsq-ending .zsq-note { margin-top: 28px; max-width: 100ch; }

/* Native modal: keyboard focus trapping and inert background come from dialog. */
.zsq-dialog { width: calc(100vw - 32px); max-width: none; height: calc(100dvh - 32px); max-height: none; padding: 20px; border: 1px solid var(--zs-border-strong); border-radius: var(--zs-radius-md); color: var(--zs-text-primary); background: var(--zs-canvas); }
.zsq-dialog::backdrop { background: var(--zs-surface-overlay); }
.zsq-dialog[open] { display: flex; flex-direction: column; gap: 14px; }
.zsq-dialog__toolbar { display: flex; align-items: center; flex-wrap: wrap; gap: 12px; }
.zsq-dialog__toolbar h2 { font-size: 1rem; margin: 0 auto 0 0; }
.zsq-dialog button, .zsq-dialog__toolbar a { padding: 10px 14px; min-height: 44px; border: 1px solid var(--zs-border-default); border-radius: var(--zs-radius-xs); background: var(--zs-control-bg); color: var(--zs-text-primary); font: inherit; cursor: pointer; text-decoration: none; }
.zsq-dialog__viewport { flex: 1; min-height: 0; overflow: auto; display: grid; place-items: center; background: var(--zs-canvas-elevated); overscroll-behavior: contain; touch-action: pan-x pan-y pinch-zoom; }
.zsq-dialog__viewport img { display: block; max-width: 100%; max-height: 100%; width: auto; height: auto; object-fit: contain; }
.zsq-dialog.is-actual .zsq-dialog__viewport { display: block; }
.zsq-dialog.is-actual img { max-width: none; max-height: none; }
.zsq-dialog__caption { color: var(--zs-text-secondary); font-size: .9rem; line-height: 1.5; margin: 0; }
.zsq-dialog__hint { color: var(--zs-text-muted); font-size: .8rem; margin: 0; }

@media (max-width: 1100px) {
  .zsq-shell .zsq-main { width: calc(100% - 48px); }
  .zsq-hero { gap: 28px; grid-template-columns: minmax(0, .85fr) minmax(0, 1.15fr); }
  .zsq-hero .zsq-promise { font-size: 3rem; }
  .zsq-two-col { gap: 30px; }
  .zsq-access { grid-template-columns: minmax(0, 1fr) 240px; gap: 30px; }
  .zsq-shell .zsp-nav__link { padding-inline: .55rem; }
}
@media (max-width: 800px) {
  .zsq-hero { grid-template-columns: 1fr; padding-top: 38px; }
  .zsq-hero__copy { max-width: 650px; }
  .zsq-hero .zsq-promise { font-size: clamp(2.7rem, 6.5vw, 3.4rem); }
  .zsq-rail, .zsq-pair, .zsq-two-col { grid-template-columns: 1fr; }
  .zsq-greek-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .zsq-rail { gap: 22px; }
  .zsq-rail > div + div { border-left: 0; padding: 20px 0 0; border-top: 1px solid var(--zs-divider); }
  .zsq-workflow { grid-template-columns: 1fr 1fr; }
  .zsq-section { padding-block: 48px; }
  .zsq-inline-cta { flex-direction: column; align-items: flex-start; }
  .zsq-access { grid-template-columns: 1fr; }
  .zsq-mobile { border-top: 1px solid var(--zs-divider); padding-top: 30px; }
  .zsq-mobile .zsq-figure { max-width: 285px; }
  .zsq-dialog { padding: 14px; width: calc(100vw - 16px); height: calc(100dvh - 16px); }
  .zsq-dialog__toolbar h2 { flex-basis: 100%; }
}
@media (max-width: 480px) {
  .zsq-shell .zsq-main { width: calc(100% - 36px); }
  .zsq-hero { padding-top: 26px; }
  .zsq-main .zsp-kicker { font-size: .76rem; letter-spacing: .05em; }
  .zsq-main h1 { font-size: .96rem; }
  .zsq-main p { font-size: 1rem; }
  .zsq-main .zsq-note { font-size: .85rem; }
  .zsq-actions { gap: 18px; }
  .zsq-actions .zsp-button { width: 100%; }
  .zsq-contents { gap: 6px 20px; }
  .zsq-contents > span { width: 100%; }
  .zsq-figure__heading { flex-wrap: wrap; gap: 6px; }
  .zsq-workflow { gap: 20px; }
  .zsq-workflow, .zsq-greek-grid { grid-template-columns: 1fr; }
  .zsq-workflow h3 { font-size: 1.06rem; }
  .zsq-glossary { grid-template-columns: 100px 1fr; gap: 0 10px; }
}

/* Visible Greek examples and progressively enhanced Gamma comparisons. */
.zsq-greek-image { margin: 18px 0; }
.zsq-greek-image .zsq-figure__heading { font-size: .76rem; gap: 8px; }
.zsq-greek-image .zsq-image-link { display: flex; align-items: center; min-height: 225px; background: var(--zs-canvas); }
.zsq-greek-image img { width: 100%; height: auto; }
.zsq-greek-image figcaption { font-size: .76rem; }
.zsq-greek > .zsp-text-link { display: inline-block; margin-top: 18px; font-size: .88rem; }
.zsq-comparison-tabs { display: flex; flex-wrap: wrap; gap: 8px; margin: 28px 0 24px; }
.zsq-comparison-tabs[hidden], .zsq-comparison[hidden] { display: none; }
.zsq-comparison-tabs button { min-height: 44px; padding: 12px 18px; border: 1px solid var(--zs-border-strong); border-radius: var(--zs-radius-xs); color: var(--zs-text-secondary); background: var(--zs-control-bg); font: inherit; cursor: pointer; }
.zsq-comparison-tabs button[aria-selected="true"] { color: var(--zs-text-primary); border-color: var(--zs-brand-accent); box-shadow: inset 0 -2px var(--zs-brand-accent); }
.zsq-comparison-viewer[data-enhanced] .zsq-comparison { margin-top: 0; padding-top: 0; border-top: 0; }
@media (max-width: 480px) {
  .zsq-greek-image .zsq-image-link { min-height: 0; }
  .zsq-comparison-tabs { gap: 6px; }
  .zsq-comparison-tabs button { padding: 10px; font-size: .85rem; flex: 1 1 auto; }
}