/* ==========================================================================
   Genetyka - design system
   Paleta: gleboka miedz + laboratoryjna zielen + chlodna kosc
   Typografia: Source Serif 4 (tresc) + Schibsted Grotesk (UI)
   ========================================================================== */

:root{
  --paper:#f4f8f6;
  --paper-2:#eef4f1;
  --surface:#ffffff;
  --ink:#101f1c;
  --ink-2:#3c5350;
  --muted:#5d726e;
  --line:#d3e0da;
  --line-soft:#e3ece7;

  --teal:#0e4a44;
  --teal-deep:#082f2c;
  --teal-mid:#14655c;
  --copper:#9c5326;
  --copper-bright:#b4652f;
  --copper-soft:#f7e9dd;
  --copper-line:#e4c3a8;

  --sage:#dcebe3;
  --sage-soft:#eaf3ed;
  --sage-line:#c8dcd1;

  --serif:"Source Serif 4", Georgia, "Times New Roman", serif;
  --sans:"Schibsted Grotesk", "Helvetica Neue", Arial, sans-serif;
  --mono:ui-monospace, "SFMono-Regular", "Cascadia Mono", Menlo, Consolas, monospace;

  --header-h:66px;
  --sidebar-w:296px;
  --pad-x:clamp(20px, 4vw, 56px);
  --content-w:1180px;

  --ease-out:cubic-bezier(.23,1,.32,1);
  --ease-in-out:cubic-bezier(.77,0,.175,1);
  --z-header:100;
  --z-overlay:150;
  --z-drawer:200;
  --z-cookie:300;
}

@media (prefers-color-scheme: dark){
  :root{
    --paper:#08110f;
    --paper-2:#0b1614;
    --surface:#0e1b18;
    --ink:#e9f1ed;
    --ink-2:#b6c8c2;
    --muted:#93a8a2;
    --line:#1e312c;
    --line-soft:#172723;

    --teal:#7cc4b4;
    --teal-deep:#06211f;
    --teal-mid:#3d9c8c;
    --copper:#e09a63;
    --copper-bright:#e6a26c;
    --copper-soft:#241812;
    --copper-line:#4a2f20;

    --sage:#16261f;
    --sage-soft:#111f1a;
    --sage-line:#244034;
  }
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--paper);
  background-image:radial-gradient(1100px 520px at 88% -8%, rgba(20,101,92,.07), transparent 62%);
  color:var(--ink);
  font-family:var(--sans);
  font-size:17px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit}
h1,h2,h3,h4{text-wrap:balance;margin:0}
p{margin:0}
button{font:inherit}
::selection{background:var(--copper-soft);color:var(--ink)}

:focus-visible{outline:2px solid var(--copper);outline-offset:2px;border-radius:2px}

.skip-link{
  position:absolute;left:12px;top:-60px;z-index:400;
  background:var(--teal);color:#f2faf7;padding:10px 16px;border-radius:3px;
  font-size:14px;text-decoration:none;transition:top .15s var(--ease-out);
}
.skip-link:focus{top:10px}

/* ---------------------------------------------------------------- header */
.site-header{
  position:fixed;top:0;left:0;right:0;height:var(--header-h);z-index:var(--z-header);
  display:flex;align-items:center;gap:24px;
  padding:0 22px;
  background:var(--paper);
  border-bottom:1px solid var(--line);
}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink)}
.brand-mark{width:26px;height:26px;color:var(--teal);flex:none}
.brand-name{
  font-family:var(--serif);font-size:23px;font-weight:600;letter-spacing:-.02em;line-height:1;
  padding-bottom:2px;
}
.brand:hover .brand-mark{color:var(--copper)}

.search{position:relative;margin-left:auto;width:min(330px,46vw)}
.search-icon{position:absolute;left:12px;top:50%;transform:translateY(-50%);width:17px;height:17px;color:var(--muted);pointer-events:none}
.search input{
  width:100%;height:40px;padding:0 14px 0 37px;
  font-family:var(--sans);font-size:14.5px;color:var(--ink);
  background:var(--surface);border:1px solid var(--line);border-radius:4px;
  transition:border-color .18s var(--ease-out);
}
.search input::placeholder{color:var(--muted)}
.search input:focus{outline:none;border-color:var(--teal)}
.search-results{
  position:absolute;top:calc(100% + 8px);left:0;right:0;max-height:60vh;overflow:auto;
  background:var(--surface);border:1px solid var(--line);border-radius:4px;
  box-shadow:0 10px 28px rgba(4,18,16,.14);z-index:2;
}
.search-result{display:block;padding:11px 14px;text-decoration:none;border-bottom:1px solid var(--line-soft)}
.search-result:last-child{border-bottom:0}
.search-result:hover,.search-result.is-active{background:var(--sage-soft)}
.sr-title{display:block;font-size:14.5px;font-weight:600;line-height:1.35}
.sr-section{display:block;font-family:var(--mono);font-size:10.5px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin-top:3px}
.search-empty{padding:14px;font-size:14px;color:var(--muted)}

.menu-btn{
  display:none;width:40px;height:40px;padding:0;background:none;border:0;cursor:pointer;
  flex-direction:column;justify-content:center;gap:5px;align-items:flex-start;
}
.menu-btn span{display:block;width:20px;height:1.5px;background:var(--ink);transition:transform .2s var(--ease-out),opacity .2s}
.menu-btn[aria-expanded="true"] span:nth-child(1){transform:translateY(6.5px) rotate(45deg)}
.menu-btn[aria-expanded="true"] span:nth-child(2){opacity:0}
.menu-btn[aria-expanded="true"] span:nth-child(3){transform:translateY(-6.5px) rotate(-45deg)}

/* ---------------------------------------------------------------- shell */
.shell{display:block;padding-top:var(--header-h)}

.sidebar{
  position:fixed;top:var(--header-h);left:0;bottom:0;width:var(--sidebar-w);
  padding:26px 20px 28px var(--pad-x);
  overflow-y:auto;overscroll-behavior:contain;
  background:var(--paper-2);
  border-right:1px solid var(--line);
  scrollbar-width:thin;
  scrollbar-color:var(--line) transparent;
}
.sidebar::-webkit-scrollbar{width:7px}
.sidebar::-webkit-scrollbar-thumb{background:var(--line);border-radius:6px}

.sidebar-group{margin-bottom:14px;padding-top:16px;border-top:1px solid var(--line-soft)}
.sidebar-group:first-child{padding-top:0;border-top:0}
.sidebar-label{
  font-family:var(--mono);font-size:11px;font-weight:600;letter-spacing:.11em;text-transform:uppercase;
  color:var(--ink-2);margin:0 0 6px;
}
.sidebar-link{
  display:block;margin:0 -8px;padding:6px 8px;border-radius:2px;
  font-size:15px;line-height:1.38;color:var(--ink-2);text-decoration:none;
  transition:color .16s var(--ease-out),background-color .16s var(--ease-out);
}
.sidebar-link:hover{color:var(--ink);background:var(--sage-soft)}
.sidebar-link.is-active{color:var(--teal);font-weight:600;background:var(--sage-soft)}

.sidebar-foot{margin-top:26px;padding-top:18px;border-top:1px solid var(--line)}
.sidebar-foot p{font-size:12.5px;line-height:1.55;color:var(--muted)}
.sidebar-foot a{display:inline-block;margin-top:8px;font-size:12.5px;color:var(--teal);text-decoration:none}
.sidebar-foot a:hover{text-decoration:underline}

.overlay{
  position:fixed;inset:0;z-index:var(--z-overlay);
  background:rgba(6,20,18,.46);
  border:0;padding:0;
  opacity:0;transition:opacity .2s var(--ease-out);
}
.overlay.is-visible{opacity:1}

.main{margin-left:var(--sidebar-w);min-width:0;padding-bottom:0}

/* ---------------------------------------------------------------- hero */
.hero{
  position:relative;overflow:hidden;
  background:var(--teal-deep);
  color:#eef6f2;
  display:grid;grid-template-columns:1.02fr .98fr;align-items:center;
  gap:clamp(20px,4vw,56px);
  min-height:min(72vh,560px);
  padding:clamp(40px,5.4vw,76px) var(--pad-x);
}
.hero-copy{position:relative;z-index:2;max-width:560px}
.hero-brand{
  font-family:var(--serif);font-weight:600;
  font-size:clamp(46px,7.2vw,88px);line-height:.94;letter-spacing:-.03em;
  color:#f3faf6;margin:0 0 22px;
}
.hero h1{
  font-family:var(--sans);font-weight:500;
  font-size:clamp(22px,2.5vw,32px);line-height:1.26;letter-spacing:-.012em;
  color:#eaf4ef;max-width:26ch;
}
.hero-sentence{
  margin-top:16px;font-size:16.5px;line-height:1.65;color:rgba(234,244,239,.76);max-width:44ch;
}
.hero-cta{
  display:inline-flex;align-items:center;gap:10px;margin-top:30px;
  padding:14px 24px;border-radius:3px;
  background:#edf5f0;color:#0a2a26;text-decoration:none;
  font-size:15px;font-weight:600;letter-spacing:.01em;
  box-shadow:0 1px 2px rgba(0,0,0,.18);
  transition:background .18s var(--ease-out),transform .18s var(--ease-out);
}
.hero-cta:hover{background:var(--copper-bright);color:#fff;transform:translateY(-1px)}
.hero-cta svg{width:16px;height:16px;transition:transform .2s var(--ease-out)}
.hero-cta:hover svg{transform:translateX(3px)}

.hero-visual{position:relative;align-self:stretch;min-height:340px;overflow:hidden}
.hero-visual img{
  position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:52% 50%;
  transform:scale(1.04);
  filter:grayscale(1) contrast(1.08) brightness(1.02);
  mix-blend-mode:screen;opacity:.88;
}
.hero-visual::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(90deg,var(--teal-deep) 0%,rgba(9,51,48,.62) 16%,rgba(9,51,48,0) 52%);
}
.seq-trace{
  margin:44px 0 0;height:52px;opacity:.5;pointer-events:none;
  border-top:1px solid var(--line);padding-top:10px;
}
.seq-trace svg{width:100%;height:100%;display:block}

/* ---------------------------------------------------------------- home */
.home-body{max-width:var(--content-w);margin:0 auto;padding:0 var(--pad-x)}

.intro{
  display:block;
  padding:48px 0 8px;
}
.intro p{font-family:var(--serif);font-size:19px;line-height:1.68;color:var(--ink-2);max-width:68ch}
.intro p+p{margin-top:16px}
.intro p strong{color:var(--ink);font-weight:600}
.intro-meta{font-family:var(--mono);font-size:11.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);padding-top:6px}
.intro-meta span{display:block;margin-bottom:6px}

.section-block{
  display:grid;grid-template-columns:minmax(180px,230px) 1fr;
  gap:clamp(20px,4vw,48px);
  padding:38px 0 10px;border-top:1px solid var(--line);margin-top:34px;
}
.section-head h2{
  font-family:var(--serif);font-size:25px;font-weight:600;line-height:1.15;letter-spacing:-.018em;
}
.section-head .count{
  display:block;margin-top:8px;font-family:var(--mono);font-size:11px;
  letter-spacing:.1em;text-transform:uppercase;color:var(--muted);
}
.section-head p{margin-top:10px;font-size:14px;line-height:1.55;color:var(--muted);max-width:30ch}

.row-list{display:block;border-top:1px solid var(--line-soft)}
.row{
  display:grid;grid-template-columns:1fr 22px;gap:14px;align-items:center;
  padding:16px 2px;border-bottom:1px solid var(--line-soft);
  text-decoration:none;color:inherit;
}
.row-title{
  font-family:var(--serif);font-size:20px;font-weight:600;line-height:1.3;letter-spacing:-.008em;
  background-image:linear-gradient(var(--teal),var(--teal));
  background-repeat:no-repeat;background-position:0 100%;background-size:0 1px;
  transition:background-size .25s var(--ease-out),color .18s var(--ease-out);
  display:inline;
}
.row-ex{display:block;margin-top:4px;font-size:14.5px;line-height:1.5;color:var(--muted);max-width:66ch}
.row-arrow{color:var(--muted);font-size:17px;transition:transform .2s var(--ease-out),color .2s}
.row:hover .row-title{color:var(--teal);background-size:100% 1px}
.row:hover .row-arrow{transform:translateX(4px);color:var(--copper)}

.home-note{
  margin:48px 0 0;padding:26px 28px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  display:grid;grid-template-columns:1fr auto;gap:24px;align-items:center;
}
.home-note p{font-size:15px;color:var(--ink-2);max-width:62ch}
.home-note a{
  font-size:14.5px;font-weight:600;color:var(--teal);text-decoration:none;white-space:nowrap;
}
.home-note a:hover{text-decoration:underline}

/* ---------------------------------------------------------------- article */
.article-wrap{max-width:860px;margin:0 auto;padding:0 var(--pad-x)}
.article{padding:36px 0 20px}

.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:12.5px;color:var(--ink-2);margin-bottom:22px;
}
.breadcrumb a{color:var(--ink-2);text-decoration:none}
.breadcrumb a:hover{color:var(--teal)}
.breadcrumb span{color:var(--muted)}

.article h1{
  font-family:var(--serif);font-size:clamp(31px,4.4vw,46px);font-weight:600;
  line-height:1.1;letter-spacing:-.022em;max-width:26ch;
}
.lede{
  margin-top:18px;font-family:var(--serif);font-size:19.5px;line-height:1.6;color:var(--ink-2);max-width:62ch;
}
.meta{
  margin-top:20px;padding-top:16px;border-top:1px solid var(--line-soft);
  font-family:var(--mono);font-size:11.5px;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-2);
  display:flex;flex-wrap:wrap;gap:10px;
}
.meta i{font-style:normal;color:var(--muted)}

.toc{margin:36px 0 14px;padding:22px 0 20px;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.toc h2{
  font-family:var(--mono);font-size:11.5px;font-weight:600;letter-spacing:.1em;text-transform:uppercase;
  color:var(--ink-2);margin:0 0 12px;
}
.toc ol{margin:0;padding:0;list-style:none;counter-reset:toc}
.toc li{font-size:15px;line-height:1.45;padding:0;counter-increment:toc;break-inside:avoid}
.toc li::before{
  content:counter(toc,decimal-leading-zero);font-family:var(--mono);font-size:11px;
  color:var(--copper);margin-right:12px;letter-spacing:.04em;
}
.toc a{color:var(--ink);text-decoration:none}
.toc a:hover{color:var(--teal);text-decoration:underline}
@media (min-width:1100px){.toc ol{columns:2;column-gap:40px}}

.prose{
  font-family:var(--serif);font-size:18.5px;line-height:1.72;color:var(--ink);
  padding-top:26px;
}
.prose > *{max-width:68ch}
.prose h2{
  font-family:var(--serif);font-size:clamp(24px,2.6vw,31px);font-weight:600;line-height:1.22;
  letter-spacing:-.016em;margin:52px 0 18px;
}
.prose h2:first-child{margin-top:0}
.prose h3{
  font-family:var(--sans);font-size:19px;font-weight:600;line-height:1.35;letter-spacing:-.004em;
  margin:32px 0 10px;
}
.prose p{margin-bottom:18px}
.prose ul,.prose ol{margin:0 0 20px;padding-left:22px}
.prose li{margin-bottom:8px;padding-left:2px}
.prose li::marker{color:var(--copper)}
.prose a{color:var(--teal);text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:3px}
.prose a:hover{color:var(--copper)}
.prose strong{font-weight:600}
.prose em{font-style:italic}
.prose hr{border:0;border-top:1px solid var(--line);margin:36px 0}
.prose blockquote{
  margin:26px 0;padding:0 0 0 22px;border-left:1px solid var(--copper);
  font-size:19px;font-style:italic;color:var(--ink-2);
}
.prose code{
  font-family:var(--mono);font-size:.86em;background:var(--sage-soft);
  border:1px solid var(--sage-line);border-radius:3px;padding:1px 5px;
}
.prose img{border-radius:3px;margin:26px 0}

.prose table{
  width:100%;border-collapse:collapse;font-family:var(--sans);font-size:14.5px;line-height:1.5;
}
.prose th{
  text-align:left;padding:9px 12px;border-bottom:1px solid var(--ink);
  font-weight:600;font-size:13px;letter-spacing:.01em;vertical-align:bottom;
}
.prose td{padding:10px 12px;border-bottom:1px solid var(--line-soft);vertical-align:top}
.prose tbody tr:hover{background:var(--sage-soft)}
.table-responsive{overflow-x:auto;margin:26px 0;max-width:100%}
.table-responsive table{min-width:520px;margin:0}

.info-box,.warning-box,.tip-box,.takeaways{
  font-family:var(--sans);font-size:16px;line-height:1.62;
  padding:19px 22px;margin:26px 0;border:1px solid var(--line);border-radius:3px;
  background:var(--surface);color:var(--ink);
}
.info-box{background:var(--sage-soft);border-color:var(--sage-line)}
.warning-box{background:var(--copper-soft);border-color:var(--copper-line)}
.takeaways{background:var(--paper-2)}
.info-box p,.warning-box p,.tip-box p,.takeaways p{margin-bottom:10px}
.info-box p:last-child,.warning-box p:last-child,.tip-box p:last-child,.takeaways p:last-child{margin-bottom:0}
.info-box strong,.warning-box strong,.takeaways strong{color:var(--teal)}
.warning-box strong{color:var(--copper)}

.prose details.faq-item{border-bottom:1px solid var(--line);padding:0}
.prose summary{
  position:relative;cursor:pointer;list-style:none;
  padding:17px 40px 17px 0;font-family:var(--sans);font-size:17px;font-weight:600;line-height:1.45;
}
.prose summary::-webkit-details-marker{display:none}
.prose summary::after{
  content:"+";position:absolute;right:4px;top:50%;transform:translateY(-50%);
  font-family:var(--sans);font-size:23px;font-weight:400;color:var(--copper);
  transition:transform .2s var(--ease-out);
}
.prose details[open] summary::after{transform:translateY(-50%) rotate(45deg)}
.prose .faq-a{padding:0 0 20px;font-size:17px;line-height:1.68;color:var(--ink-2)}
.prose .faq-a p{margin-bottom:12px}

.prose dl{margin:8px 0 24px}
.prose dt{font-family:var(--sans);font-weight:600;font-size:16.5px;margin-top:18px;color:var(--ink)}
.prose dd{margin:5px 0 0;color:var(--ink-2)}

.prev-next{
  display:grid;grid-template-columns:1fr 1fr;gap:0;margin-top:52px;
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
.prev-next a{
  display:block;padding:20px 22px;text-decoration:none;color:inherit;
  transition:background .18s var(--ease-out);
}
.prev-next a:first-child{border-right:1px solid var(--line)}
.prev-next a:hover{background:var(--sage-soft)}
.prev-next .pn-label{
  display:block;font-family:var(--mono);font-size:10px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);
}
.prev-next .pn-title{display:block;margin-top:6px;font-family:var(--serif);font-size:17px;font-weight:600;line-height:1.35}
.prev-next a:last-child{text-align:right}

.related{margin-top:44px}
.related h2{font-family:var(--mono);font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);margin-bottom:6px}
.related a{
  display:flex;justify-content:space-between;gap:16px;align-items:baseline;
  padding:13px 0;border-bottom:1px solid var(--line-soft);
  font-family:var(--serif);font-size:17.5px;font-weight:600;text-decoration:none;color:var(--ink);
}
.related a:hover{color:var(--teal)}
.related a span{font-family:var(--sans);font-size:13px;font-weight:400;color:var(--muted);white-space:nowrap}

.disclaimer{
  margin-top:44px;padding:20px 22px;border:1px solid var(--line);border-radius:3px;
  background:var(--paper-2);font-size:13.5px;line-height:1.6;color:var(--muted);
}
.disclaimer strong{color:var(--ink-2)}

/* ---------------------------------------------------------------- footer */
.site-footer{
  max-width:var(--content-w);margin:72px auto 0;padding:36px var(--pad-x) 30px;
  border-top:1px solid var(--line);
}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:32px}
.footer-brand{font-family:var(--serif);font-size:23px;font-weight:600;letter-spacing:-.02em;color:var(--ink)}
.footer-note{margin-top:10px;font-size:13.5px;line-height:1.6;color:var(--muted);max-width:38ch}
.footer-h{
  font-family:var(--mono);font-size:10px;font-weight:500;letter-spacing:.12em;text-transform:uppercase;
  color:var(--muted);margin-bottom:12px;
}
.footer-grid a{display:block;font-size:14px;color:var(--ink-2);text-decoration:none;padding:3px 0}
.footer-grid a:hover{color:var(--teal);text-decoration:underline}
.footer-legal{margin-top:30px;padding-top:18px;border-top:1px solid var(--line-soft);font-size:12.5px;color:var(--muted)}

/* ---------------------------------------------------------------- cookie */
.vd-cookie-bar{
  position:fixed;left:24px;bottom:24px;z-index:var(--z-cookie);
  display:flex;flex-direction:column;gap:14px;
  width:min(420px,calc(100vw - 48px));
  padding:20px 22px;background:var(--surface);color:var(--ink);
  border:1px solid var(--line);border-radius:4px;
  box-shadow:0 12px 32px rgba(8,26,23,.16);
}
.vd-cookie-bar p{font-size:13.5px;line-height:1.55;color:var(--ink-2)}
.vd-cookie-bar a{color:var(--teal);text-decoration:underline}
.vd-cookie-actions{display:flex;gap:10px;flex:none}
.vd-btn-ghost,.vd-btn-solid{
  padding:9px 16px;border-radius:3px;font-size:13.5px;font-weight:600;cursor:pointer;
  transition:background .16s var(--ease-out),border-color .16s,color .16s;
}
.vd-btn-ghost{background:transparent;border:1px solid var(--line);color:var(--ink-2)}
.vd-btn-ghost:hover{border-color:var(--ink-2);color:var(--ink)}
.vd-btn-solid{background:var(--teal-deep);border:1px solid var(--teal-deep);color:#eef6f2}
.vd-btn-solid:hover{background:#0d3f3a;border-color:#0d3f3a}

.noscript{
  position:fixed;left:16px;right:16px;bottom:16px;z-index:400;
  padding:14px 18px;background:var(--copper-soft);border:1px solid var(--copper-line);
  border-radius:3px;font-size:14px;
}

/* ------------------------------------------------ wyszukiwarka mobilna */
.search-toggle{display:none}
.intro h2{
  font-family:var(--serif);font-size:26px;font-weight:600;line-height:1.25;letter-spacing:-.012em;
  margin:0 0 16px;
}
.hero-cta:active{transform:translateY(0) scale(.985)}

@media (max-width:640px){
  .search{width:auto;margin-left:auto}
  .search input,.search .search-icon{display:none}
  .search-toggle{
    display:flex;align-items:center;justify-content:center;width:44px;height:44px;
    border:0;background:transparent;border-radius:3px;color:var(--ink);cursor:pointer;
    transition:background-color .16s var(--ease-out);
  }
  .search-toggle:hover{background:var(--sage-soft)}
  .search-toggle svg{width:18px;height:18px}
  .search.is-open{
    position:absolute;left:var(--pad-x);right:var(--pad-x);top:calc(100% - 4px);
    width:auto;margin:0;padding:8px;background:var(--surface);
    border:1px solid var(--line);border-radius:4px;box-shadow:0 10px 24px rgba(8,26,23,.12);z-index:130;
  }
  .search.is-open input{display:block;width:100%}
  .search.is-open .search-icon{display:block;left:22px}
  .search.is-open .search-toggle{display:none}
  .search.is-open .search-results{left:0;right:0;top:calc(100% + 4px);width:auto}
  .vd-cookie-bar{left:12px;right:12px;bottom:12px;width:auto}
}

/* ---------------------------------------------------------------- motion */
.page{animation:rise .28s var(--ease-out) both}
@keyframes rise{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms !important;animation-delay:0ms !important;transition-duration:.001ms !important}
}

/* ---------------------------------------------------------------- 1180px */
@media (max-width:1180px){
  :root{--sidebar-w:268px;--pad-x:28px}
  .hero{min-height:min(72vh,540px)}
}

/* ---------------------------------------------------------------- 900px */
@media (max-width:900px){
  :root{--header-h:60px;--pad-x:22px}

  .menu-btn{display:flex}
  .brand{margin-left:2px}
  .brand-name{font-size:21px}
  .search{width:min(300px,54vw)}

  .sidebar{
    top:0;bottom:0;width:min(330px,86vw);z-index:var(--z-drawer);
    padding:22px 20px 30px 22px;
    background:var(--paper);
    transform:translateX(-101%);
    transition:transform .26s var(--vertical-ease, var(--ease-out));
    box-shadow:0 0 0 1px var(--line);
  }
  .sidebar.is-open{transform:none}
  .main{margin-left:0}

  .hero{grid-template-columns:1fr;min-height:0;padding:34px var(--pad-x) 40px;gap:0}
  .hero-copy{max-width:none}
  .hero-brand{font-size:clamp(46px,11vw,64px);margin-bottom:16px}
  .hero h1{font-size:clamp(20px,4.6vw,25px);max-width:32ch}
  .hero-visual{order:2;min-height:230px;margin-top:26px}
  .hero-visual img{object-position:center 42%}
  .seq-trace{height:44px;margin-top:30px}
  .hero-cta{margin-top:24px}

  .intro{grid-template-columns:1fr;gap:18px;padding-top:34px}
  .section-block{grid-template-columns:1fr;gap:14px;padding-top:30px}
  .section-head p{max-width:52ch}
  .row-title{font-size:18.5px}
  .home-note{grid-template-columns:1fr;gap:14px}

  .footer-grid{grid-template-columns:1fr 1fr;gap:26px}
  .footer-grid > div:first-child{grid-column:1 / -1}
  .vd-cookie-bar{flex-direction:column;align-items:flex-start;gap:14px;padding:16px 18px}
  .vd-cookie-actions{width:100%}
  .vd-btn-ghost,.vd-btn-solid{flex:1}
}

/* ---------------------------------------------------------------- 640px */
@media (max-width:640px){
  .search{width:auto;flex:1;margin-left:0}
  .search input{height:38px;font-size:14px;padding-left:34px}
  .search input::placeholder{color:transparent}
  .site-header{gap:12px;padding:0 14px}

  .hero{padding-bottom:70px}
  .hero-visual{min-height:200px}
  .toc{padding:16px 18px}
  .toc ol{columns:1}
  .prose{font-size:17.5px;line-height:1.72}
  .prose > *{max-width:none}
  .lede{font-size:18px}
  .prev-next{grid-template-columns:1fr}
  .prev-next a:first-child{border-right:0;border-bottom:1px solid var(--line)}
  .prev-next a:last-child{text-align:left}
  .site-footer{padding-bottom:96px}
  .footer-grid{grid-template-columns:1fr}
}

@media print{
  .site-header,.sidebar,.site-footer,.vd-cookie-bar,.toc,.prev-next,.related,.disclaimer{display:none}
  .main{margin:0}
  body{background:#fff;color:#000}
}