/* Shared visual language for the semantic landing and its home introduction. */
.sl-page { --sl-muted: #52596d; }
.sl-page h2, .sl-home h2 { font-size: clamp(34px, 4vw, 54px); line-height: 1.06; letter-spacing: -.035em; font-weight: 500; margin: 18px 0 24px; }
.sl-page h3 { font-size: 23px; line-height: 1.15; letter-spacing: -.025em; font-weight: 500; }
.sl-page p { line-height: 1.65; }
.sl-page .eyebrow { color: #52596d; margin: 0; line-height: 1.5; }
.sl-page :is(a, button, summary):focus-visible, .sl-home a:focus-visible { outline: 3px solid #4164c5; outline-offset: 5px; }
.sl-page section[id] { scroll-margin-top: 70px; }
.sl-skip { position: fixed; top: -80px; left: 20px; z-index: 100; background: var(--accent); padding: 12px 20px; }
.sl-skip:focus { top: 10px; }
.sl-sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
.sl-page .nav { backdrop-filter: none; background: var(--paper); }
.sl-desktop-nav { display: flex; gap: 28px; font-size: 14px; }
.sl-desktop-nav [aria-current] { text-decoration: underline; text-underline-offset: 5px; }
.sl-mobile-menu { display: none; }
.sl-page .btn { justify-content: center; gap: 15px; padding: 14px 21px; }
.sl-page .nav .btn { padding: 10px 16px; font-size: 13px; }
.sl-hero { padding: 80px 0 74px; border-top: 0; }
.sl-hero-grid { display: grid; grid-template-columns: 1.16fr 1fr; gap: 62px; align-items: center; }
.sl-hero .h1 { font-size: clamp(46px, 5.3vw, 76px); line-height: 1.02; margin: 25px 0; }
.sl-hero .h1 > span { color: #586581; }
.sl-hero .h1 em { color: var(--ink); }
.sl-lede { font-size: 18px; color: var(--sl-muted); max-width: 555px; }
.sl-text-link { display: inline-flex; align-items: center; gap: 18px; font-size: 14px; padding: 12px 0; text-decoration: underline; text-underline-offset: 5px; }
.sl-audience { font-size: 12px; color: var(--sl-muted); margin: 25px 0 0; max-width: 400px; }
.sl-diagram { background: var(--ink); color: var(--paper); padding: 30px; margin: 0; border-radius: 20px; box-shadow: 0 25px 65px -35px #0a123070; }
.sl-diagram-label { font-family: var(--font-mono); font-size: 10px; letter-spacing: .03em; display: flex; gap: 9px; align-items: center; color: #cad0e0; }
.sl-status-dot { width: 6px; height: 6px; background: var(--accent); border-radius: 50%; flex: 0 0 auto; }
.sl-sources { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-top: 28px; }
.sl-sources > div { border: 1px solid #35405f; border-radius: 8px; padding: 14px 10px; font-size: 12px; text-align: center; }
.sl-sources span { display: block; font-family: var(--font-mono); color: #9aa8c5; font-size: 10px; margin-bottom: 10px; }
.sl-flow-line { text-align: center; color: #8792af; font-size: 26px; padding: 6px; line-height: 1.2; }
.sl-layer { border: 1px solid var(--accent); background: #18263a; padding: 19px 14px 22px; border-radius: 12px; text-align: center; }
.sl-layer-symbol { color: var(--accent); font-size: 28px; line-height: 1; margin-bottom: 8px; }
.sl-layer strong { font-size: 27px; font-weight: 500; letter-spacing: -.03em; }
.sl-layer > div:last-child { display: flex; flex-wrap: wrap; justify-content: center; gap: 6px; margin-top: 16px; }
.sl-layer > div > span { border: 1px solid #546740; color: #d6e5bd; padding: 5px 7px; font-family: var(--font-mono); font-size: 9px; border-radius: 4px; }
.sl-output { display: flex; gap: 16px; align-items: center; background: var(--accent); color: var(--ink); border-radius: 9px; padding: 16px; }
.sl-output > span { font-size: 28px; }
.sl-output strong { display: block; font-size: 15px; font-weight: 500; }
.sl-output small { display: block; font-family: var(--font-mono); font-size: 10px; margin-top: 7px; }
.sl-diagram figcaption { color: #a9b5cd; font-size: 10px; line-height: 1.6; margin-top: 18px; }
.sl-principles { border-block: 1px solid var(--line); }
.sl-principles > div { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.sl-principles p { font-size: 13px; margin-block: 23px; display: flex; gap: 15px; align-items: center; }
.sl-principles span { font-family: var(--font-mono); font-size: 10px; color: #687085; }
.sl-bridge { display: grid; grid-template-columns: 1.3fr 1fr; gap: 100px; align-items: center; }
.sl-bridge > div > p:not(.eyebrow) { font-size: 16px; color: var(--sl-muted); max-width: 570px; }
.sl-metric { border: 1px solid var(--line-strong); border-radius: 14px; padding: 30px; background: #eeece4; }
.sl-label { font-family: var(--font-mono); font-size: 10px; text-transform: uppercase; letter-spacing: .08em; }
.sl-metric h3 { font-size: 31px; margin: 25px 0 16px; }
.sl-metric .sl-formula { color: var(--ink); font-family: var(--font-mono); font-size: 13px; padding-bottom: 20px; border-bottom: 1px solid var(--line); }
.sl-metric p:not(.sl-formula) { font-size: 13px !important; }
.sl-metric-consumers { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 25px; }
.sl-metric-consumers span { background: var(--paper); border: 1px solid var(--line); border-radius: 5px; padding: 6px 12px; font-size: 11px; }
.sl-architecture { background: #eeece4; }
.sl-section-head { margin-bottom: 44px; }
.sl-section-head > p:not(.eyebrow) { max-width: 650px; color: var(--sl-muted); font-size: 16px; }
.sl-flow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 27px; list-style: none; margin: 0; padding: 0; }
.sl-flow li { border-top: 1px solid var(--ink); padding-top: 20px; }
.sl-step { font-family: var(--font-mono); font-size: 11px; display: flex; gap: 12px; }
.sl-step span { color: #66718a; }
.sl-flow h3 { margin-top: 28px; }
.sl-flow p { color: var(--sl-muted); font-size: 14px; }
.sl-example-section { background: var(--ink); color: var(--paper); }
.sl-example-section .eyebrow { color: var(--accent); }
.sl-example-section .sl-section-head > p:not(.eyebrow) { color: #b8c3da; }
.sl-examples { min-inline-size: 0; border: 0; margin: 0; padding: 0; }
.sl-example-options { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 25px; }
.sl-example-options label { position: relative; cursor: pointer; }
.sl-example-options input { position: absolute; opacity: 0; width: 1px; height: 1px; }
.sl-example-options label > span { display: block; border: 1px solid #4d5a77; border-radius: 7px; padding: 11px 17px; font-size: 13px; color: #c8d3e8; }
.sl-example-options input:checked + span { background: var(--accent); color: var(--ink); border-color: var(--accent); }
.sl-example-options input:focus-visible + span { outline: 3px solid var(--paper); outline-offset: 4px; }
.sl-examples:has(input[value="0"]:checked) .sl-example-1, .sl-examples:has(input[value="1"]:checked) .sl-example-0 { display: none; }
.sl-payload-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.sl-payload { min-width: 0; background: #111b35; border: 1px solid #35405f; border-radius: 12px; overflow: hidden; }
.sl-payload-output { border-color: #7c9950; }
.sl-payload-head { display: flex; justify-content: space-between; align-items: center; border-bottom: 1px solid #35405f; padding: 17px 22px; font-family: var(--font-mono); font-size: 11px; color: #bbc8e0; gap: 10px; }
.sl-payload-output .sl-payload-head { color: var(--accent); }
.sl-payload pre { margin: 0; padding: 24px 22px; white-space: pre-wrap; overflow-wrap: anywhere; font-size: 13px; line-height: 1.8; min-height: 272px; }
.sl-payload code { font-family: var(--font-mono); }
.sl-payload-input code { color: #b7c3da; }
.sl-data-tags { display: flex; flex-wrap: wrap; gap: 7px; padding: 0 22px 22px; }
.sl-data-tags span { font-family: var(--font-mono); border: 1px solid #44516d; border-radius: 4px; padding: 5px 8px; font-size: 10px; color: #c6d0e3; }
.sl-payload-output .sl-data-tags span { border-color: #5e743b; color: #d4e3b8; }
.sl-example-note { color: #c3cde0; font-size: 14px; max-width: 800px; margin-top: 23px; }
.sl-sample-label { color: #9aa8c5; font-family: var(--font-mono); font-size: 10px; margin: 16px 0 0; }
.sl-controls { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0 32px; }
.sl-controls article { border-top: 1px solid var(--line-strong); padding: 24px 0; }
.sl-controls h3 { margin: 22px 0 14px; }
.sl-controls p { color: var(--sl-muted); font-size: 15px; }
.sl-hash-note { display: grid; grid-template-columns: 1fr 2fr; gap: 40px; margin-top: 30px; padding: 25px 28px; border-left: 3px solid #91ae3c; background: #eaeedc; border-radius: 0 8px 8px 0; }
.sl-hash-note strong { font-weight: 500; font-size: 19px; line-height: 1.4; }
.sl-hash-note p { font-size: 14px; margin: 0; color: #45513b; }
.sl-roles-section { background: #eeece4; }
.sl-roles { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.sl-roles article { border: 1px solid var(--line-strong); border-radius: 12px; padding: 28px; }
.sl-role { background: var(--ink); color: var(--accent); border-radius: 5px; padding: 6px 10px; font-family: var(--font-mono); font-size: 12px; display: inline-block; }
.sl-roles h3 { font-size: 27px; margin: 26px 0 18px; }
.sl-roles p { font-size: 15px; color: var(--sl-muted); }
.sl-roles ul { padding: 20px 0 0; margin: 23px 0 0; border-top: 1px solid var(--line); list-style: none; }
.sl-roles li { position: relative; padding-left: 18px; font-size: 13px; line-height: 1.7; margin: 9px 0; }
.sl-roles li::before { content: '↗'; position: absolute; left: 0; }
.sl-faq { display: grid; grid-template-columns: 1fr 1.4fr; gap: 75px; }
.sl-faq details { border-bottom: 1px solid var(--line-strong); }
.sl-faq details:first-child { border-top: 1px solid var(--line-strong); }
.sl-faq summary { position: relative; cursor: pointer; font-size: 16px; line-height: 1.5; padding: 22px 32px 22px 0; list-style: none; font-weight: 500; }
.sl-faq summary::-webkit-details-marker { display: none; }
.sl-faq summary::after { content: '+'; position: absolute; right: 2px; font-size: 23px; top: 17px; }
.sl-faq details[open] summary::after { content: '−'; }
.sl-faq details p { margin: 0 0 24px; color: var(--sl-muted); font-size: 15px; }
.sl-final { background: var(--ink); color: var(--paper); text-align: center; }
.sl-final .eyebrow { color: var(--accent); }
.sl-final h2 { margin-top: 24px; }
.sl-final p:not(.eyebrow) { color: #b8c3da; max-width: 560px; margin: 24px auto; }
.sl-final .btn { margin: 6px 0; }
.sl-page footer p { color: var(--sl-muted); font-size: 13px; }

/* Home section: scoped classes allow it to share the legacy SPA stylesheet. */
.sl-home { background: #eae8df; }
.sl-home-grid { display: grid; grid-template-columns: 1.2fr 1fr; align-items: center; gap: 80px; }
.sl-home .eyebrow { color: #52596d; }
.sl-home h2 { margin: 18px 0 25px; max-width: 660px; }
.sl-home h2 em { font-family: var(--font-serif); font-weight: 400; }
.sl-home p { font-size: 17px; line-height: 1.6; color: #52596d; max-width: 620px; }
.sl-home .btn { margin-top: 14px; }
.sl-home .sl-home-audience { font-family: var(--font-mono); font-size: 10px; margin-top: 23px; letter-spacing: .08em; }
.sl-home-visual { background: var(--ink); color: var(--paper); border-radius: 15px; padding: 30px; }
.sl-home-visual > span { font-family: var(--font-mono); font-size: 10px; color: #b8c3da; text-transform: uppercase; letter-spacing: .08em; }
.sl-home-sources { display: flex; flex-wrap: wrap; gap: 7px; margin: 21px 0; }
.sl-home-sources span { border: 1px solid #414d69; border-radius: 5px; font-size: 11px; padding: 8px 10px; }
.sl-home-layer { border-block: 1px solid #39485f; padding: 25px 0; }
.sl-home-layer strong { font-size: 27px; font-weight: 500; letter-spacing: -.025em; }
.sl-home-layer p { font-size: 13px; color: #b8c3da; margin: 10px 0 0; }
.sl-home-result { background: var(--accent); color: var(--ink); display: flex; justify-content: space-between; align-items: center; gap: 20px; border-radius: 7px; padding: 15px; font-size: 13px; margin-top: 24px; }
.sl-home-visual .sl-home-caption { font-size: 10px; color: #b8c3da; margin: 15px 0 0; }
@media (max-width: 1100px) {
  .sl-hero-grid { gap: 34px; grid-template-columns: 1.1fr 1fr; }
  .sl-desktop-nav { gap: 18px; font-size: 13px; }
  .sl-page .nav-right > .btn { display: none; }
  .sl-bridge, .sl-home-grid { gap: 40px; }
  .sl-diagram { padding: 24px; }
  .sl-sources > div { padding-inline: 6px; font-size: 11px; }
  .sl-roles article { padding: 23px; }
}
@media (max-width: 820px) {
  .sl-hero-grid, .sl-bridge, .sl-home-grid { grid-template-columns: 1fr; gap: 40px; }
  .sl-hero { padding: 50px 0; }
  .sl-hero .h1 { max-width: 640px; font-size: clamp(45px, 8.5vw, 66px); }
  .sl-diagram { max-width: 560px; width: 100%; }
  .sl-flow, .sl-controls { grid-template-columns: repeat(2, 1fr); }
  .sl-roles { grid-template-columns: 1fr; }
  .sl-roles h3 { max-width: 530px; }
  .sl-faq { grid-template-columns: 1fr; gap: 25px; }
  .sl-page section, .sl-home { padding-block: 62px; }
  .sl-principles > div { gap: 20px; }
  .sl-principles p { align-items: flex-start; font-size: 12px; gap: 10px; }
  .sl-hash-note { grid-template-columns: 1fr; gap: 12px; }
  .sl-desktop-nav { display: none; }
  .sl-mobile-menu { display: block; }
  .sl-mobile-menu summary { cursor: pointer; font-size: 12px; padding: 8px; border: 1px solid var(--line-strong); border-radius: 5px; }
  .sl-mobile-menu nav { position: absolute; top: 63px; right: 0; left: 0; background: var(--paper); border-bottom: 1px solid var(--line-strong); padding: 24px; display: flex; flex-direction: column; gap: 23px; box-shadow: 0 20px 30px #0a123012; }
}
@media (max-width: 560px) {
  .sl-page .logo { font-size: 16px; gap: 7px; }
  .sl-page .logo-mark { transform: scale(.8); }
  .sl-page .nav-right { gap: 7px; }
  .sl-page .lang-toggle a { padding: 7px 8px; font-size: 10px; }
  .sl-hero .h1 { font-size: 45px; }
  .sl-page h2, .sl-home h2 { font-size: 36px; }
  .sl-lede, .sl-home p { font-size: 16px; }
  .sl-audience { font-size: 12px; }
  .sl-diagram, .sl-home-visual { padding: 24px 18px; }
  .sl-diagram-label { font-size: 9px; }
  .sl-layer strong { font-size: 25px; }
  .sl-principles > div { grid-template-columns: 1fr; gap: 0; padding-block: 15px; }
  .sl-principles p { margin: 8px 0; font-size: 12px; }
  .sl-flow, .sl-controls, .sl-payload-grid { grid-template-columns: 1fr; }
  .sl-flow { gap: 24px; }
  .sl-flow h3 { margin: 20px 0 12px; }
  .sl-flow p { font-size: 15px; }
  .sl-metric { padding: 25px; }
  .sl-controls article { padding-bottom: 10px; }
  .sl-payload pre { font-size: 11px; padding: 20px 16px; min-height: 0; }
  .sl-payload-head { padding-inline: 16px; font-size: 10px; }
  .sl-data-tags { padding: 0 16px 20px; }
  .sl-example-options label > span { font-size: 11px; padding: 11px 12px; }
  .sl-page .foot-grid { grid-template-columns: 1fr 1fr; gap: 30px 20px; }
  .sl-page .foot-grid > div:first-child { grid-column: 1 / -1; }
}
@media (prefers-reduced-motion: reduce) { .sl-page *, .sl-home * { animation: none !important; transition: none !important; scroll-behavior: auto !important; } }