@import url('https://fonts.googleapis.com/css2?family=Open+Sans:wght@400;600;700&family=Oswald:wght@400;500;600&display=swap');

*{box-sizing:border-box;margin:0;padding:0}
:root{
  --orange:#fe8e14;--orange-hover:#e07d0b;--orange-tint:#fff8ee;
  --ink:#323234;--muted:#606060;--gray:#999;--line:#ddd;--soft:#f5f5f5;
  --link:#306877;--ok:#1e7a4b;--ok-soft:#edf8f1;--error:#b3261e;--error-soft:#fdf2f1;
  --warning:#8a5a00;--warning-soft:#fff7e6;--white:#fff;
  --classic:#2563eb;--neural:#7c3aed;
  --heading:'Oswald','Segoe UI',sans-serif;--body:'Open Sans','Segoe UI',sans-serif;--mono:'Courier New',monospace;
  --shell:1280px;--radius:8px
}
html{scroll-behavior:smooth;scroll-padding-top:90px}
body{font-family:var(--body);font-size:15px;line-height:1.65;color:var(--ink);background:#fafafa;min-height:100vh}
button,input,select{font:inherit}
button,a{-webkit-tap-highlight-color:transparent}
button{cursor:pointer}
a{color:var(--link);text-underline-offset:3px}
button:focus-visible,a:focus-visible,input:focus-visible,[tabindex]:focus-visible{outline:3px solid rgba(48,104,119,.3);outline-offset:3px}
[hidden]{display:none!important}

/* ---------------------------------------------------------------- header */
.site-header{position:sticky;top:0;z-index:50;background:#fff;border-bottom:1px solid var(--line)}
.site-header-inner{max-width:var(--shell);min-height:68px;margin:auto;padding:0 24px;display:flex;align-items:center;gap:16px}
.brand{display:flex;align-items:center;text-decoration:none}
.brand-logo{height:26px;width:auto}
.brand-divider{height:26px;width:1px;background:var(--line)}
.brand-product{font-family:var(--heading);font-size:15px;letter-spacing:.055em;text-transform:uppercase;color:var(--muted);white-space:nowrap}
.brand-tag{display:inline-block;margin-right:8px;padding:0 7px;border:1px solid rgba(254,142,20,.55);border-radius:4px;background:rgba(254,142,20,.12);color:#b45d00;font:500 11px var(--heading);letter-spacing:.1em}
.header-nav{margin-left:auto;display:flex;align-items:center;gap:22px}
.header-nav-secondary{margin-left:8px}
.header-nav .nav-link{font-size:13px;font-weight:600;color:var(--muted);text-decoration:none;white-space:nowrap}
.header-nav .nav-link:hover{color:var(--orange-hover)}
.btn{min-height:42px;border:1px solid transparent;border-radius:5px;padding:9px 17px;display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:700;font-size:13px;line-height:1.3;text-decoration:none;transition:background .15s,border-color .15s,transform .15s}
.btn:active:not(:disabled){transform:translateY(1px)}
.btn:disabled{opacity:.45;cursor:not-allowed}
.btn-primary{background:var(--orange);border-color:var(--orange);color:#29200f}
.btn-primary:hover:not(:disabled){background:var(--orange-hover);border-color:var(--orange-hover);color:#fff}
.btn-secondary{background:#fff;border-color:#c8c8c8;color:var(--ink)}
.btn-secondary:hover:not(:disabled){background:var(--soft);border-color:#999}
.text-button{border:0;background:transparent;padding:0;color:var(--link);font-size:11px;text-decoration:underline;text-underline-offset:3px}
.text-button:hover{color:var(--orange-hover)}

/* ------------------------------------------------------------------ intro */
.page-intro{max-width:var(--shell);margin:auto;padding:40px 24px 24px;display:flex;align-items:end;justify-content:space-between;gap:32px}
.eyebrow,.section-label{font-family:var(--heading);font-size:11px;font-weight:500;letter-spacing:.14em;color:var(--muted)}
.page-intro h1{font:400 clamp(30px,4vw,44px)/1.15 var(--heading);letter-spacing:-.015em;margin:5px 0 10px}
.page-intro>div>p:last-child{max-width:760px;color:var(--muted);font-size:16px}
.intro-link{white-space:nowrap;font-size:13px;font-weight:600;text-decoration:none}
.notice-banner{max-width:calc(var(--shell) - 48px);margin:0 auto 24px;padding:12px 16px;display:flex;gap:12px;background:var(--orange-tint);border:1px solid #f6c893;border-left:4px solid var(--orange);border-radius:5px;font-size:12px;line-height:1.55}
.notice-banner svg{width:19px;height:19px;flex:none;margin-top:2px;color:var(--orange-hover)}
.notice-banner strong{display:block}

/* ------------------------------------------------------------------- shell */
.lab-shell{max-width:calc(var(--shell) - 48px);margin:0 auto 56px;background:#fff;border:1px solid #d8d8d8;border-radius:10px;box-shadow:0 10px 35px rgba(30,30,30,.06)}
.source-bar{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:18px;padding:18px 20px;border-bottom:1px solid var(--line);background:#fcfcfc;border-radius:10px 10px 0 0}
.drop-zone{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;min-height:118px;padding:16px;border:2px dashed #c9c9c9;border-radius:8px;background:#fff;color:var(--muted);text-align:center;cursor:pointer;transition:border-color .15s,background .15s}
.drop-zone:hover,.drop-zone.is-dragover{border-color:var(--orange);background:var(--orange-tint)}
.drop-zone svg{width:24px;height:24px;color:#9a9a9a}
.drop-title{font:500 16px var(--heading);letter-spacing:.01em;color:var(--ink)}
.drop-hint{font-size:11px;max-width:330px;line-height:1.5}
.sample-panel{display:flex;flex-direction:column;gap:9px;justify-content:center}
.sample-row{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px}
.sample-chip{display:flex;flex-direction:column;gap:1px;text-align:left;padding:8px 10px;border:1px solid #d5d5d5;border-radius:6px;background:#fff;color:var(--ink);transition:border-color .15s,box-shadow .15s}
.sample-chip:hover{border-color:var(--orange);box-shadow:0 2px 8px rgba(254,142,20,.16)}
.sample-chip span{font-size:12px;font-weight:700}
.sample-chip small{font-size:10px;color:var(--muted)}
.source-meta{display:flex;align-items:center;gap:8px;font-size:11px;color:var(--muted);flex-wrap:wrap}
.source-meta strong{color:var(--ink);font-weight:600}
.source-dot{width:7px;height:7px;border-radius:50%;background:var(--ok)}
.source-meta .text-button{margin-left:auto}

/* ------------------------------------------------------------------ panels */
.lab-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));grid-template-rows:repeat(8,auto);column-gap:1px;row-gap:0;background:var(--line);border-bottom:1px solid var(--line)}
.panel{min-width:0;grid-row:1/-1;display:grid;grid-template-rows:subgrid;row-gap:12px;padding:18px 20px 20px;background:#fff;align-content:start}

.panel-head{display:flex;align-items:start;justify-content:space-between;gap:10px}
.panel-head h2{font:400 22px var(--heading);line-height:1.2;margin-top:2px}
.panel[data-strategy="classic"] .panel-head h2{color:var(--classic)}
.panel[data-strategy="neural"] .panel-head h2{color:var(--neural)}
.panel-badge{font:500 9px var(--heading);letter-spacing:.09em;text-transform:uppercase;padding:4px 8px;border-radius:4px;border:1px solid #ccc;background:#f4f4f4;color:var(--muted);white-space:nowrap}
.panel-badge.is-busy{background:var(--warning-soft);border-color:#ecd19a;color:var(--warning)}
.panel-badge.is-done{background:#eef2fb;border-color:#c3d0ea;color:#2b4c8c}
.panel-badge.is-ok{background:var(--ok-soft);border-color:#a8d6bb;color:var(--ok)}
.panel-badge.is-warn{background:var(--warning-soft);border-color:#ecd19a;color:var(--warning)}
.panel-badge.is-error{background:var(--error-soft);border-color:#e6b3ae;color:var(--error)}
.panel-lede{font-size:11.5px;color:var(--muted);line-height:1.55;min-height:36px}

.mode-set{border:1px solid #ececec;border-radius:6px;background:#fbfbfb;padding:8px 10px 9px;display:flex;flex-wrap:wrap;gap:6px;min-height:94px;align-content:flex-start}
.mode-set legend{font:500 9px var(--heading);letter-spacing:.1em;text-transform:uppercase;color:var(--gray);padding:0 4px}
.mode-set label{display:inline-flex;align-items:center;gap:5px;padding:3px 7px;border:1px solid #dcdcdc;border-radius:4px;background:#fff;font-size:11px;cursor:pointer;white-space:nowrap}
.mode-set label:has(input:checked){border-color:var(--orange);background:var(--orange-tint)}
.mode-set input{accent-color:var(--orange);margin:0;width:12px;height:12px}
.mode-set input:disabled+span{color:var(--gray)}
.mode-note{flex-basis:100%;font-size:10px;color:var(--gray);line-height:1.45;min-height:30px}

.stage{position:relative;height:clamp(210px,30vh,330px);border:1px solid #e2e2e2;border-radius:6px;background:#f1f2f3;overflow:hidden;display:flex;align-items:center;justify-content:center}
.stage-canvas{display:block;width:100%;height:100%;cursor:default}
.stage-canvas.is-pointing{cursor:pointer}
.stage-empty{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;padding:20px;text-align:center;font-size:11.5px;color:var(--gray);background:repeating-linear-gradient(45deg,#f4f5f6,#f4f5f6 9px,#f0f1f2 9px,#f0f1f2 18px)}
.stage.is-empty .stage-canvas{visibility:hidden}
.stage.is-empty .stage-empty{visibility:visible}
.stage:not(.is-empty) .stage-empty{display:none}
.panel.is-busy .stage-canvas{opacity:.65}

.stat-row{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:4px;margin:0}
.stat-row>div{border:1px solid #eee;border-radius:5px;padding:5px 8px;background:#fdfdfd;min-width:0}
.stat-row dt{font-size:9px;text-transform:uppercase;letter-spacing:.07em;color:var(--gray);font-family:var(--heading)}
.stat-row dd{font:600 15px var(--heading);color:var(--ink);line-height:1.25;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.panel-actions{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.panel-actions .btn{min-height:36px;padding:7px 13px;font-size:12px}
.panel-actions .text-button{margin-left:auto}
.panel-feedback{display:flex;flex-direction:column;gap:6px}
.panel-status{font-size:11px;color:var(--muted);line-height:1.5;min-height:17px}
.panel-status.is-error{color:var(--error)}

.region-detail{border-left:3px solid var(--orange);background:var(--orange-tint);border-radius:0 5px 5px 0;padding:7px 10px;font-size:11px;color:var(--ink)}
.region-detail strong{font-family:var(--heading);font-size:12px}
.region-detail p{color:var(--muted);margin-top:1px;overflow-wrap:anywhere}
.region-list{display:flex;flex-direction:column;gap:4px;height:286px;overflow:auto;padding-right:2px}
.region-empty{font-size:11px;color:var(--gray);padding:10px 2px}
.region-row{display:grid;grid-template-columns:60px 20px minmax(0,1fr) auto;grid-template-areas:"thumb index meta state" "thumb index guess state";gap:0 8px;align-items:center;text-align:left;padding:4px 7px;border:1px solid #e6e6e6;border-radius:5px;background:#fff;color:var(--ink);transition:border-color .12s,background .12s}
.region-row:hover{border-color:#bbb;background:#fcfcfc}
.region-row.is-selected{border-color:var(--orange);background:var(--orange-tint);box-shadow:inset 0 0 0 1px rgba(254,142,20,.35)}
.region-thumb{grid-area:thumb;width:60px;height:44px;border-radius:3px;background:#f3f3f3;border:1px solid #eee;display:block}
.region-index{grid-area:index;font:500 12px var(--heading);color:var(--gray);align-self:start;padding-top:2px}
.region-meta{grid-area:meta;display:flex;gap:6px;align-items:baseline;min-width:0;flex-wrap:wrap}
.region-meta strong{font-size:11px;font-weight:700;white-space:nowrap}
.region-meta span{font-size:10px;color:var(--muted);white-space:nowrap}
.region-guess{grid-area:guess;font-size:10px;color:var(--gray);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.region-state{grid-area:state;font-size:10px;text-align:right;padding-left:6px;max-width:170px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.region-state.is-pending{color:var(--gray)}
.region-state.is-ok{color:var(--ok);font-weight:700}
.region-state.is-fail{color:var(--error)}

/* --------------------------------------------------------------- decode bar */
.decode-bar{display:flex;align-items:center;gap:26px;padding:12px 20px;background:#fbfbfb;border-bottom:1px solid var(--line);flex-wrap:wrap}
.padding-control{display:flex;align-items:center;gap:10px;font-size:11px;color:var(--muted);font-weight:600;white-space:nowrap}
.padding-control input{width:150px;accent-color:var(--orange)}
.padding-control output{font-family:var(--mono);font-size:11px;color:var(--ink);min-width:32px}
.decode-hint{font-size:10.5px;color:var(--gray);line-height:1.5;max-width:640px}

/* ------------------------------------------------------------------ compare */
.compare-strip{padding:16px 20px 18px;background:#fdfdfd}
.compare-head{display:flex;align-items:end;justify-content:space-between;gap:18px;flex-wrap:wrap}
.compare-head h2{font:400 21px var(--heading);margin-top:2px}
.compare-yield{display:flex;flex-direction:column;text-align:right}
.compare-yield span{font-size:10px;color:var(--gray)}
.compare-yield strong{font:500 20px var(--heading);color:var(--ink);letter-spacing:.02em}
.compare-figures{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px;margin:12px 0 10px}
.compare-figures>div{border:1px solid #ececec;border-radius:6px;padding:8px 10px;background:#fff;display:flex;flex-direction:column;gap:1px}
.compare-figures span{font-size:10px;color:var(--muted)}
.compare-figures strong{font:600 22px var(--heading);color:var(--ink)}
.compare-verdict{font-size:12px;color:var(--ink);line-height:1.6;border-left:3px solid var(--line);padding-left:10px}
.sdk-status{padding:9px 20px;font-size:10.5px;color:var(--gray);background:#f7f7f7;border-top:1px solid var(--line);border-radius:0 0 10px 10px}
.sdk-status.is-loading{color:var(--warning)}
.sdk-status.is-error{color:var(--error);background:var(--error-soft)}

/* ---------------------------------------------------------------- explainer */
.container{max-width:var(--shell);margin:auto;padding:0 24px}
.explainer{margin-bottom:60px}
.explainer-heading{max-width:820px;margin-bottom:24px}
.explainer h2{font:400 31px/1.25 var(--heading);margin:5px 0 10px}
.explainer-heading>p:last-child{color:var(--muted)}
.rule-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.rule-grid article{background:#fff;border:1px solid var(--line);border-radius:7px;padding:18px}
.rule-number{font:500 12px var(--heading);color:var(--link)}
.rule-grid h3{font:400 19px var(--heading);margin:5px 0 7px}
.rule-grid p{font-size:12px;color:var(--muted)}
.rule-grid code,.compare-table code,.code-explainer code,.faq-grid code{font-family:var(--mono);font-size:10.5px;background:#f3f4f5;border-radius:3px;padding:1px 4px;overflow-wrap:anywhere}
.compare-table-wrap{margin-top:22px;background:#fff;border:1px solid var(--line);border-radius:7px;overflow:auto}
.compare-table{width:100%;border-collapse:collapse;font-size:12px}
.compare-table caption{text-align:left;padding:13px 16px 9px;font:500 11px var(--heading);letter-spacing:.1em;text-transform:uppercase;color:var(--muted)}
.compare-table th,.compare-table td{padding:10px 16px;border-top:1px solid #eee;vertical-align:top;text-align:left}
.compare-table thead th{font:500 11px var(--heading);letter-spacing:.06em;text-transform:uppercase;color:var(--muted);border-top:0}
.compare-table tbody th{width:22%;font-weight:700;color:var(--ink);background:#fcfcfc}
.compare-table td{color:var(--muted)}
.code-explainer{margin-top:22px;background:#323234;color:#f5f5f5;border-radius:7px;padding:26px;display:grid;grid-template-columns:1fr 1fr;gap:34px;align-items:center}
.code-explainer .eyebrow{color:#bbb}
.code-explainer h2{margin-top:4px;color:#fff}
.code-explainer p:not(.eyebrow){color:#ddd;font-size:12px}
.code-explainer a{display:inline-block;color:#ffc887;font-size:12px;margin-top:12px}
.code-explainer pre{background:#242426;border:1px solid #4d4d50;border-radius:5px;padding:16px;overflow:auto;color:#f2f6f7;font:11.5px/1.75 var(--mono)}
.code-explainer code{background:transparent;padding:0;font-size:11px;color:inherit}
.faq-grid{margin-top:18px;display:grid;grid-template-columns:1fr 1fr;gap:12px}
.faq-grid details{background:#fff;border:1px solid var(--line);border-radius:6px;padding:14px 16px}
.faq-grid summary{font-weight:700;font-size:13px;cursor:pointer}
.faq-grid p{margin-top:9px;color:var(--muted);font-size:12px}

/* ------------------------------------------------------------------ footer */
.demo-footer{background:#fff;border-top:1px solid var(--line)}
.demo-footer-inner{max-width:var(--shell);margin:auto;padding:24px;display:flex;align-items:center;justify-content:space-between;gap:28px}
.disclaimer{font-size:10px;color:var(--muted);max-width:440px}
.footer-links{display:flex;align-items:center;justify-content:flex-end;gap:14px;flex-wrap:wrap;font-size:11px}
.footer-cta{white-space:nowrap}

/* ------------------------------------------------------------------ dialog */
.template-dialog{margin:auto;width:min(760px,calc(100vw - 32px));max-height:calc(100vh - 60px);border:1px solid #d5d5d5;border-radius:10px;padding:0;box-shadow:0 24px 60px rgba(20,20,20,.24);color:var(--ink)}
.template-dialog::backdrop{background:rgba(24,24,26,.45)}
.dialog-head{display:flex;align-items:start;justify-content:space-between;gap:16px;padding:16px 20px 10px}
.dialog-head h2{font:400 21px var(--heading)}
.dialog-close{border:1px solid #ddd;background:#fff;border-radius:5px;width:30px;height:30px;line-height:1;color:var(--muted)}
.dialog-tabs{display:flex;gap:6px;padding:0 20px 10px}
.dialog-tab{border:1px solid #dcdcdc;background:#fff;border-radius:4px;padding:5px 10px;font-size:11px;font-weight:600;color:var(--muted)}
.dialog-tab.is-active{border-color:var(--orange);background:var(--orange-tint);color:var(--ink)}
.dialog-note{padding:0 20px 10px;font-size:11px;color:var(--muted);line-height:1.55}
.dialog-code{margin:0 20px;background:#26262a;color:#e9eef0;border-radius:6px;padding:14px;overflow:auto;max-height:46vh;font:11px/1.65 var(--mono)}
.dialog-actions{display:flex;justify-content:flex-end;gap:8px;padding:14px 20px 18px}


/* ------------------------------------------------------------- pass 03 */
.priority-pass{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,1fr);gap:26px;padding:20px;background:#fbfbfb;border-top:1px solid var(--line)}
.priority-copy h2{font:400 22px var(--heading);margin:3px 0 8px}
.priority-copy>p:not(.section-label){font-size:12px;color:var(--muted);line-height:1.6}
.priority-copy code,.priority-caveat code{font-family:var(--mono);font-size:10.5px;background:#eef0f1;border-radius:3px;padding:1px 4px}
.priority-points{list-style:none;margin:10px 0 0;display:flex;flex-direction:column;gap:5px}
.priority-points li{position:relative;padding-left:14px;font-size:11.5px;color:var(--muted);line-height:1.55}
.priority-points li:before{content:"";position:absolute;left:0;top:6px;width:5px;height:5px;border-radius:50%;background:var(--orange)}
.priority-points strong{color:var(--ink)}
.priority-actions{display:flex;align-items:center;gap:10px;margin-top:14px;flex-wrap:wrap}
.priority-actions .btn{min-height:38px;padding:8px 15px;font-size:12px}
.priority-note{font-size:10px;color:var(--gray)}
.priority-actions .text-button{margin-left:auto}
.priority-figures{display:flex;flex-direction:column;gap:9px;min-width:0}
.priority-table{width:100%;border-collapse:collapse;background:#fff;border:1px solid #e4e4e4;font-size:11px}
.priority-table caption{caption-side:top;text-align:left;font:500 9px var(--heading);letter-spacing:.09em;text-transform:uppercase;color:var(--gray);padding:0 0 6px}
.priority-table th,.priority-table td{padding:7px 9px;text-align:left;border-top:1px solid #efefef}
.priority-table thead th{font:500 9px var(--heading);letter-spacing:.07em;text-transform:uppercase;color:var(--gray);border-top:0;background:#fafafa}
.priority-table tbody th{font-weight:600;font-size:11px;white-space:nowrap}
.priority-table td{color:var(--muted);white-space:nowrap}
.priority-table td[data-cell="text"]{max-width:150px;overflow:hidden;text-overflow:ellipsis;font-family:var(--mono);font-size:10px}
.priority-table tr.is-priority{background:var(--orange-tint)}
.priority-table tr.is-priority th{color:#8a4a00}
.priority-verdict{font-size:11.5px;line-height:1.6;color:var(--ink);border-left:3px solid var(--orange);padding-left:9px;min-height:36px}
.priority-verdict.is-error{color:var(--error);border-left-color:var(--error)}

.priority-caveat{font-size:10px;color:var(--gray);line-height:1.55}

@media(max-width:1050px){
  .priority-pass{grid-template-columns:1fr;gap:18px}
}
@media(max-width:540px){
  .priority-pass{padding:14px}
  .priority-table td[data-cell="text"]{display:none}
  .priority-table thead th:last-child{display:none}
}


/* ------------------------------------------------------- cascade explainer */
.cascade-note{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(0,1fr);gap:28px;margin-top:22px;padding:22px 24px;background:#fff;border:1px solid var(--line);border-left:4px solid var(--orange);border-radius:7px}
.cascade-copy h2{font:400 25px/1.25 var(--heading);margin:4px 0 9px}
.cascade-copy>p:not(.eyebrow):not(.cascade-aside){font-size:12.5px;color:var(--muted);line-height:1.65}
.cascade-copy code,.cascade-aside code{font-family:var(--mono);font-size:10.5px;background:#f1f2f3;border-radius:3px;padding:1px 4px}
.cascade-steps{margin:12px 0 10px;padding-left:20px;display:flex;flex-direction:column;gap:7px}
.cascade-steps li{font-size:12px;color:var(--muted);line-height:1.6}
.cascade-steps strong{color:var(--ink)}
.cascade-aside{font-size:11px;color:var(--gray);line-height:1.6;border-top:1px dashed #e2e2e2;padding-top:9px}
.cascade-copy>a{display:inline-block;margin-top:11px;font-size:11.5px;font-weight:600}
.cascade-sample{background:#fafafa;border:1px solid #eee;border-radius:6px;padding:14px 16px;display:flex;flex-direction:column}
.cascade-sample dl{display:flex;flex-direction:column;gap:10px;margin-top:9px}
.cascade-sample dt{font:600 12px var(--heading);letter-spacing:.02em;color:var(--ink)}
.cascade-sample dd{font-size:11.5px;color:var(--muted);line-height:1.55}
.cascade-sample-note{font-size:10.5px;color:var(--gray);line-height:1.55;margin-top:auto;border-top:1px dashed #e2e2e2;padding-top:11px}

@media(max-width:1050px){
  .cascade-note{grid-template-columns:1fr;gap:18px}
}

@media(max-width:1050px){
  .header-nav-secondary .nav-link{display:none}
  .mode-set label{padding:2px 5px;font-size:10.5px;gap:4px}
  .mode-set input{width:11px;height:11px}
  .source-bar{grid-template-columns:1fr}
  .stage{height:clamp(200px,34vh,300px)}
  .demo-footer-inner{align-items:flex-start;flex-direction:column}
  .footer-links{justify-content:flex-start}
}
@media(max-width:800px){
  .site-header-inner{padding:0 16px;gap:10px}
  .brand-product{font-size:12px}
  .header-nav{gap:12px}
  .header-nav .nav-link{font-size:11px}
  .header-nav-secondary{display:none}
  .page-intro{padding:28px 16px 20px}
  .notice-banner,.lab-shell{margin-left:16px;margin-right:16px}
  .lab-grid{grid-template-columns:1fr;grid-template-rows:none;row-gap:1px}
  .panel{grid-row:auto;display:flex;flex-direction:column;gap:12px}
  .sample-row{grid-template-columns:repeat(2,minmax(0,1fr))}
  .compare-figures{grid-template-columns:repeat(2,minmax(0,1fr))}
  .rule-grid{grid-template-columns:1fr}
  .code-explainer{grid-template-columns:1fr;gap:18px}
  .faq-grid{grid-template-columns:1fr}
  .intro-link{display:none}
  .region-list{height:auto;max-height:220px}
  .stat-row{grid-template-columns:repeat(4,minmax(0,1fr))}
}
@media(max-width:540px){
  body{font-size:14px}
  .site-header-inner{min-height:60px}
  .brand-logo{height:22px}
  .brand-divider{display:none}
  .brand-product{max-width:150px;white-space:normal;line-height:1.25}
  .brand-tag{display:none}
  .header-nav .nav-link:last-child{display:none}
  .page-intro h1{font-size:30px}
  .lab-shell{border-radius:7px;margin-bottom:38px}
  .source-bar{padding:14px}
  .panel{padding:14px}
  .stat-row dd{font-size:13px}
  .sample-row{grid-template-columns:1fr 1fr}
  .decode-bar{padding:10px 14px;gap:10px}
  .padding-control input{width:110px}
  .compare-strip{padding:14px}
  .compare-yield{text-align:left}
  .region-row{grid-template-columns:52px 18px minmax(0,1fr);grid-template-areas:"thumb index meta" "thumb index guess" "thumb index state";gap:0 6px}
  .region-thumb{width:52px;height:40px}
  .region-state{text-align:left;padding-left:0;max-width:none}
  .explainer h2{font-size:26px}
  .code-explainer{padding:18px}
  .dialog-code{max-height:40vh}
  .demo-footer-inner{padding:20px 16px}
  .footer-links{align-items:flex-start;flex-direction:column}
}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}