/* K³ Lab — a persistent creation and a focused workspace. */
.lab-page{--lab-line:#d1d1c9;--lab-muted:#62625a;background:#f1f1ee;color:#111;line-height:1.6}
.lab-shell{max-width:1360px;width:calc(100% - 64px);margin-inline:auto}
.lab-intro{padding-block:65px 42px}
.lab-kicker{font:600 .62rem/1.6 ui-monospace,monospace;letter-spacing:.15em;text-transform:uppercase;color:#66665e}
.lab-intro h1{font-size:clamp(2.9rem,5.8vw,6rem);letter-spacing:-.065em;line-height:1.02;margin:18px 0}
.lab-lead{max-width:700px;font-size:1.08rem;line-height:1.8;color:var(--lab-muted)}
.lab-truth{font-size:.73rem;color:#63635a;max-width:800px;margin-top:22px}
.lab-notice{padding:18px;border:1px solid var(--lab-line)}
.lab-workspace{display:grid;grid-template-columns:minmax(0,.8fr) minmax(0,1.2fr);gap:clamp(24px,4vw,64px);align-items:start;scroll-margin-top:100px;padding-bottom:80px}
.lab-asset{position:sticky;top:102px;background:#0d0d0c;color:#eeeee8;border:1px solid #282824;padding:24px;min-width:0}
.lab-asset-top{display:flex;justify-content:space-between;gap:15px;font:500 .58rem ui-monospace,monospace;color:#b7b7ad;text-transform:uppercase;letter-spacing:.06em}
.lab-art{height:clamp(150px,calc(100svh - 530px),300px);display:grid;place-items:center;margin-block:26px;background:radial-gradient(ellipse,#292922,transparent 70%);perspective:1000px}
.lab-art img{width:auto;height:100%;max-width:100%;object-fit:contain;box-shadow:8px 18px 30px #0008;transform:rotate(-3deg);transition:transform .65s cubic-bezier(.2,.7,.2,1)}
.lab-page[data-lab-stage="verify"] .lab-art img,.lab-page[data-lab-stage="register"] .lab-art img{transform:rotate(0)}
.lab-page[data-lab-stage="commerce"] .lab-art img{transform:rotate(2deg) scale(.95)}
.lab-file-glyph{display:grid;place-items:center;width:110px;height:140px;border:1px solid #72726a;color:#dadad0;font:700 2rem ui-monospace,monospace;transform:rotate(-4deg)}
.lab-asset-info{display:grid;gap:4px;margin-bottom:20px;overflow-wrap:anywhere}
.lab-asset-info>strong{font-size:1.1rem}
.lab-asset-info>span{color:#aaa99e;font-size:.72rem}
.lab-fingerprint,.lab-original{display:grid;gap:6px;padding-block:12px;border-top:1px solid #33332b;font-size:.6rem;color:#a9a99e}
.lab-asset code{font:400 .62rem/1.6 ui-monospace,monospace;color:#e1e1d6;overflow-wrap:anywhere}
.lab-download,.lab-reset{display:flex;align-items:center;justify-content:space-between;gap:20px;background:none;border:0;border-top:1px solid #33332b;width:100%;padding:14px 0;color:inherit;cursor:pointer;font-size:.72rem;text-align:left}
.lab-history{border-top:1px solid #33332b;padding-top:14px;font-size:.72rem}
.lab-history summary{cursor:pointer;display:list-item;color:#e1e1d6}
.lab-history summary>span:last-child{float:right;color:#a9a99e;font-size:.63rem}
.lab-history ol{list-style:none;margin:16px 0 0;padding:0;max-height:260px;overflow:auto}
.lab-history li{position:relative;padding:0 0 18px 18px;border-left:1px solid #44443b;color:#cecec2;font-size:.7rem;overflow-wrap:anywhere}
.lab-history li::before{content:"";position:absolute;left:-3px;top:6px;width:5px;height:5px;border-radius:50%;background:#d8d8cb}
.lab-history time{display:block;color:#99998e;font-size:.56rem;margin-top:4px}
.lab-local-note{color:#a09f92;font-size:.56rem;line-height:1.6;margin:16px 0 0}
.lab-desk{min-width:0}
.lab-steps{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:8px;border-bottom:1px solid var(--lab-line);padding-bottom:20px}
.lab-steps button{display:flex;flex-direction:column;gap:7px;align-items:start;background:none;border:0;border-top:2px solid #b8b8ae;padding:12px 0 0;text-align:left;font-size:.6rem;line-height:1.4;color:#55554d;cursor:pointer}
.lab-steps button>span:first-child{font:500 .58rem ui-monospace,monospace;color:#76766d}
.lab-steps button[aria-current="step"]{border-color:#111;color:#111;font-weight:800}
.lab-steps button:disabled{opacity:.55;cursor:default}
.lab-next{display:flex;gap:15px;align-items:baseline;flex-wrap:wrap;margin:22px 0 0;font-size:.66rem;color:var(--lab-muted)}
.lab-next strong{color:#222}
.lab-feedback{margin:12px 0;min-height:1.6em;font-size:.78rem;color:#424237}
.lab-feedback.error{color:#8a3028}
.lab-panel{padding:clamp(24px,3vw,42px);background:#fafaf7;border:1px solid var(--lab-line);margin-bottom:18px;min-width:0}
.lab-panel h2{font-size:clamp(1.9rem,3vw,3rem);line-height:1.06;letter-spacing:-.05em;margin:15px 0 20px;font-weight:800}
.lab-panel>p,.lab-operation>p{font-size:.86rem;line-height:1.8;color:var(--lab-muted);margin:0 0 24px}
.lab-panel h2:focus-visible{outline:2px solid #111;outline-offset:6px}
.lab-actions{display:flex;flex-wrap:wrap;gap:12px}
.lab-page :is(.primary-btn,.secondary-btn){display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:46px;padding:12px 17px;border:1px solid #111;font-size:.7rem;line-height:1.5;font-weight:700;cursor:pointer;border-radius:0;transition:background .18s,color .18s,transform .18s}
.lab-page .primary-btn{background:#111;color:#f5f5ee}
.lab-page .secondary-btn{background:transparent;color:#111;border-color:#aaa99e}
.lab-page :is(.primary-btn,.secondary-btn):hover:not(:disabled){transform:translateY(-2px);background:#313129;color:#fff}
.lab-page :is(button,input,select):disabled{opacity:.48;cursor:default}
.lab-page label{font-size:.68rem;text-transform:none;letter-spacing:0;font-weight:600;gap:8px;margin:18px 0}
.lab-page :is(input,select){min-height:46px;font:400 .86rem/1.5 var(--font-sans);padding:11px;border:1px solid #c6c6bc;background:#fff;color:#111;max-width:100%}
.lab-file-picker{width:100%}
.lab-file-picker input{font-size:.72rem}
.lab-page .lab-note{font-size:.71rem;line-height:1.7;color:#747469;margin-top:20px}
.lab-result{margin:22px 0;padding:17px;border-left:2px solid #8d8d80;background:#efefe7;font-size:.84rem;line-height:1.7}
.lab-result[data-result="exact"]{border-color:#335b43;background:#e9eee8}
.lab-result[data-result="changed"]{border-color:#8c713a;background:#f1ecdf}
.lab-profile{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:24px}
.lab-profile div:last-child{grid-column:1/-1}
.lab-profile dt,.lab-certificate dt{font-size:.62rem;color:#6d6d61}
.lab-profile dd,.lab-certificate dd{font-size:.78rem;margin:4px 0 0;overflow-wrap:anywhere}
.lab-certificate{border:1px solid #bdbdb0;padding:20px;margin-top:24px}
.lab-certificate h3{font-size:1rem;margin:0 0 10px}
.lab-certificate code,.lab-holder code{font:400 .68rem/1.6 ui-monospace,monospace;overflow-wrap:anywhere}
.lab-certificate dl{display:grid;gap:12px}
.lab-holder{display:grid;gap:5px;border-block:1px solid var(--lab-line);padding:16px 0;font-size:.68rem}
.lab-holder strong{font-size:1.25rem;overflow-wrap:anywhere}
.lab-operation{padding-top:28px}
.lab-operation+.lab-operation{border-top:1px solid var(--lab-line);margin-top:24px}
.lab-operation h3{font-size:1.25rem;margin:0 0 10px;letter-spacing:-.03em}
.lab-operation .lab-operation-result{font-size:.8rem;margin:15px 0 0;color:#3c5342}
.lab-desk-footer{display:flex;align-items:start;gap:20px;justify-content:space-between;padding-top:18px;border-top:1px solid var(--lab-line);color:var(--lab-muted)}
.lab-desk-footer small{font-size:.65rem;max-width:380px}
.lab-reset{width:auto;flex-shrink:0;border:0;padding:0}
.lab-registry{padding-block:70px 100px;border-top:1px solid var(--lab-line)}
.lab-registry h2{font-size:clamp(2.5rem,4vw,4.5rem);line-height:1.05;letter-spacing:-.05em;margin:14px 0}
.lab-search{display:flex;gap:10px;margin-top:30px}
.lab-search input{flex:1;min-width:0}
.lab-hints{display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin-top:16px;font-size:.7rem;color:var(--lab-muted)}
.lab-hints button{background:none;border:1px solid var(--lab-line);padding:8px 12px;cursor:pointer;color:#222}
.lab-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin:35px 0;border-block:1px solid var(--lab-line);padding:22px 0}
.lab-stats>div{display:grid;gap:6px;font-size:.66rem;color:var(--lab-muted)}
.lab-stats strong{font-size:1.8rem;line-height:1.2;color:#111}
#registryResultMeta{font-size:.78rem;color:var(--lab-muted)}
.lab-registry-record{display:grid;grid-template-columns:minmax(0,1.3fr) minmax(0,1fr) auto;gap:20px;align-items:center;padding:24px 0;border-bottom:1px solid var(--lab-line)}
.lab-registry-record div{min-width:0;display:grid;gap:5px}
.lab-registry-record strong{font-size:.94rem;overflow-wrap:anywhere}
.lab-registry-record code{font:.66rem/1.6 ui-monospace,monospace;overflow-wrap:anywhere}
.lab-registry-record small{font-size:.67rem;color:var(--lab-muted)}
.lab-activity{margin-top:28px;font-size:.8rem}
.lab-activity summary{cursor:pointer}
.lab-activity p{padding:10px 0;border-bottom:1px solid var(--lab-line)}
.lab-page dialog{width:min(650px,calc(100% - 32px));max-height:85svh;overflow:auto;padding:28px;background:#f8f8f2;border:1px solid #aaa;color:#111}
.lab-page dialog::backdrop{background:#0009}
.lab-dialog-head{display:flex;align-items:start;justify-content:space-between;gap:18px}
.lab-dialog-head h2{font-size:1.5rem;overflow-wrap:anywhere;margin:0}
.lab-dialog-head button{background:none;border:1px solid #aaa;padding:8px 12px;cursor:pointer}
#provenanceModalBody{font-size:.82rem}
#provenanceModalBody code{overflow-wrap:anywhere;font-size:.7rem}
#provenanceModalBody dl{display:grid;gap:15px}
#provenanceModalBody dt{color:var(--lab-muted);font-size:.66rem}
#provenanceModalBody dd{margin:4px 0 0;overflow-wrap:anywhere}
#provenanceModalBody ol{padding-left:20px}
#provenanceModalBody li{padding:8px 0}
.lab-page [hidden]{display:none!important}
@media(max-width:980px){
 .lab-shell{width:calc(100% - 36px)}
 .lab-intro{padding-block:42px 26px}
 .lab-workspace{grid-template-columns:1fr;gap:25px}
 .lab-asset{position:static;display:grid;grid-template-columns:105px minmax(0,1fr);gap:0 20px;padding:20px}
 .lab-asset-top{grid-column:1/-1;margin-bottom:15px}
 .lab-art{height:125px;margin:0;grid-column:1;grid-row:2/5}
 .lab-file-glyph{width:80px;height:110px;font-size:1.5rem}
 .lab-asset-info{grid-column:2;margin-bottom:12px}
 .lab-fingerprint,.lab-original{grid-column:2}
 .lab-download,.lab-history,.lab-local-note{grid-column:1/-1}
 .lab-history ol{max-height:220px}
 .lab-desk-footer{flex-wrap:wrap}
 .lab-registry-record{grid-template-columns:1fr 1fr}
 .lab-registry-record button{grid-column:1/-1;justify-self:start}
}
@media(max-width:540px){
 .lab-steps{grid-template-columns:repeat(3,1fr);gap:15px}
 .lab-steps button{font-size:.65rem}
 .lab-panel{padding:24px 20px}
 .lab-actions{flex-direction:column;align-items:stretch}
 .lab-search{flex-direction:column}
 .lab-stats{grid-template-columns:1fr 1fr}
 .lab-registry-record{grid-template-columns:1fr;gap:12px}
 .lab-asset{grid-template-columns:78px minmax(0,1fr);gap:0 14px}
 .lab-art{height:95px}
 .lab-asset-info>strong{font-size:.95rem}
}
@media(min-width:981px) and (max-height:700px){.lab-asset{position:static}}
@media(prefers-reduced-motion:reduce){.lab-page *{transition:none!important;animation:none!important;scroll-behavior:auto!important}}

/* A guided first visit: one active task, three chapters, optional detail. */
.lab-intro{padding-block:48px 32px}
.lab-intro h1{font-size:clamp(2.8rem,5.1vw,5.1rem);max-width:1100px}
.lab-intro .lab-lead{font-size:1.03rem;max-width:720px;margin-bottom:16px}
.lab-intro-notes{display:flex;flex-wrap:wrap;gap:10px;color:#616157;font-size:.76rem}
.lab-asset{padding:25px 28px}
.lab-asset-top{font-size:.67rem}
.lab-art{position:relative;height:clamp(180px,calc(100svh - 490px),330px);isolation:isolate}
.lab-art img{max-height:100%;will-change:auto}
.lab-asset-state{font-size:.8rem;line-height:1.6;color:#e0e0cb;border-left:2px solid #adae8e;padding:0 0 0 12px;margin:22px 0}
.lab-scan{position:absolute;inset:12% 8% auto;height:2px;background:#eff6c5;box-shadow:0 0 16px #dfecc9;opacity:0;pointer-events:none;z-index:2}
.lab-seal{position:absolute;right:4%;bottom:4%;width:40px;height:40px;display:grid;place-items:center;border:1px solid #d7dbc2;border-radius:50%;background:#e3e7cf;color:#23271d;font-size:1.2rem;box-shadow:0 5px 20px #0005}
.lab-technical{font-size:.75rem;line-height:1.6;border-top:1px solid #33332b;padding-top:15px;margin-top:18px}
.lab-technical summary{cursor:pointer;color:#c1c1b5;min-height:28px}
.lab-technical[open] summary{margin-bottom:16px}
.lab-technical .lab-certificate{border-color:#414139;padding:16px;margin-block:12px}
.lab-technical .lab-certificate h3{font-size:.8rem;color:#e1e1d6}
.lab-technical .lab-certificate dt{color:#aaa99e}
.lab-history{margin-top:16px;font-size:.76rem}
.lab-history ol{max-height:200px}
.lab-history li{font-size:.76rem}
.lab-history time{font-size:.65rem}
.lab-local-note{font-size:.68rem}
.lab-chapters{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;list-style:none;padding:0;margin:0 0 20px}
.lab-chapters li{position:relative;display:flex;flex-wrap:wrap;align-items:center;gap:9px;font-size:.78rem;line-height:1.4;color:#737369;padding-bottom:18px}
.lab-chapter-no{display:grid;place-items:center;width:26px;height:26px;border:1px solid #bdbdb2;border-radius:50%;font:500 .65rem ui-monospace,monospace;transition:background .3s,color .3s,border-color .3s}
.lab-chapter-track{position:absolute;bottom:0;left:0;right:0;height:2px;background:#d2d2c9;overflow:hidden}
.lab-chapter-track::after{content:"";display:block;width:100%;height:100%;background:#4f5742;transform:scaleX(0);transform-origin:left;transition:transform .65s cubic-bezier(.22,.75,.2,1)}
.lab-chapters li[aria-current="step"]{font-weight:700;color:#171914}
.lab-chapters li[aria-current="step"] .lab-chapter-track::after{transform:scaleX(.45)}
.lab-chapters li.is-complete .lab-chapter-track::after{transform:scaleX(1)}
.lab-chapters li:is(.is-complete,[aria-current="step"]) .lab-chapter-no{background:#25291f;color:#f8f8f0;border-color:#25291f}
.lab-orientation{display:flex;gap:20px;align-items:center;justify-content:space-between;font-size:.72rem;color:#747469;min-height:30px}
.lab-text-button{display:inline-flex;align-items:center;gap:8px;background:none;border:0;padding:7px 0;color:#4d5144;font:inherit;font-size:.78rem;text-decoration:underline;text-underline-offset:4px;cursor:pointer;min-height:36px}
.lab-feedback{min-height:0;margin:0;font-size:.8rem}
.lab-feedback:not(:empty){margin:12px 0 16px;padding-left:12px;border-left:2px solid #b7b9a7}
.lab-panel{margin-top:18px;padding:clamp(26px,3vw,42px);box-shadow:0 12px 30px #35372a04}
.lab-panel h2{font-size:clamp(2rem,3.1vw,3rem);max-width:580px;line-height:1.1}
.lab-panel>p,.lab-operation>p{font-size:.94rem;line-height:1.75}
.lab-page :is(.primary-btn,.secondary-btn){font-size:.8rem;min-height:50px;padding:13px 20px;line-height:1.45}
.lab-page .primary-btn{background:#24281f;border-color:#24281f}
.lab-page .primary-btn>span[aria-hidden]{display:inline-block;transition:transform .2s}
.lab-page .primary-btn:hover>span[aria-hidden]{transform:translateX(3px)}
.lab-page .primary-btn:active:not(:disabled),.lab-page .secondary-btn:active:not(:disabled){transform:translateY(1px)}
.lab-page label{font-size:.8rem;line-height:1.6}
.lab-page :is(input,select){font-size:1rem}
.lab-page .lab-note{font-size:.78rem;line-height:1.7;color:#66675c}
.lab-disclosure{border-top:1px solid var(--lab-line);margin:26px 0 0;padding-top:18px;font-size:.82rem}
.lab-disclosure summary{cursor:pointer;line-height:1.6;color:#5f6255;min-height:32px}
.lab-disclosure[open] summary{margin-bottom:14px}
.lab-disclosure .lab-actions{padding-top:0}
.lab-disclosure .lab-note{margin-top:8px}
#inputOptions .lab-file-picker{margin-top:0}
#recordOptions{margin:22px 0}
#recordOptions .lab-disclosure{margin-top:12px;padding-top:12px}
.lab-success-label{color:#526344}
.lab-skip{display:flex;margin-top:16px}
.lab-result{border-color:#73845d;background:#ebeee3;font-size:.92rem;margin:0 0 22px}
.lab-comparison{display:grid;grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);align-items:center;gap:14px;margin:20px 0 24px;padding:18px;background:#efefe6;border:1px solid #ddded0}
.lab-comparison div{min-width:0;display:grid;gap:8px}
.lab-comparison div>span{font-size:.72rem;color:#616452}
.lab-comparison code{font:500 .72rem/1.5 ui-monospace,monospace;overflow-wrap:anywhere}
.lab-comparison>span{color:#7a815e}
#analysisDetails{margin:8px 0 22px}
.lab-profile dt{font-size:.75rem}
.lab-profile dd{font-size:.83rem}
.lab-holder{font-size:.8rem;gap:7px}
.lab-holder code{font-size:.68rem;color:#707365}
.lab-operation{padding-top:24px}
.lab-operation>h3{font-size:1rem}
.lab-completion{position:relative;padding:24px;border:1px solid #bac5a6;background:#e9eedf;margin:24px 0}
.lab-completion-mark{display:grid;place-items:center;width:29px;height:29px;border:1px solid #8a9974;border-radius:50%;color:#4e6239;margin-bottom:14px}
.lab-completion h3{font-size:1.5rem;letter-spacing:-.035em;margin:0 0 12px;line-height:1.2}
.lab-completion p{font-size:.87rem;color:#4e5743;line-height:1.7;margin:0 0 20px}
.lab-transfer .lab-actions{margin-block:18px}
.lab-desk-footer small{font-size:.72rem;line-height:1.7}
.lab-reset{font-size:.76rem;min-height:32px}
.lab-registry{padding-block:28px 55px;margin-top:15px}
.lab-registry-summary{display:flex;align-items:center;justify-content:space-between;gap:25px;cursor:pointer;list-style:none}
.lab-registry-summary::-webkit-details-marker{display:none}
.lab-registry-summary>span:first-child{display:grid;gap:8px}
.lab-registry-summary strong{font-size:1.2rem;letter-spacing:-.02em}
.lab-registry-summary small{font-size:.8rem;color:var(--lab-muted)}
.lab-registry-summary>span:last-child{font-size:1.8rem;transition:transform .3s}
.lab-registry[open]>.lab-registry-summary>span:last-child{transform:rotate(90deg)}
.lab-registry-content{padding-top:45px}
@media(max-width:980px){
 .lab-intro{padding-block:30px 24px}
 .lab-intro h1{max-width:700px}
 .lab-asset{padding:18px 20px;grid-template-columns:90px minmax(0,1fr);gap:0 18px}
 .lab-art{height:110px;grid-row:2/5;margin:0}
 .lab-seal{width:27px;height:27px;font-size:.85rem;right:-2%;bottom:0}
 .lab-asset-info{margin-bottom:0;align-self:center}
 .lab-asset-state{grid-column:2;margin:10px 0 0;font-size:.74rem;padding-left:9px;align-self:start}
 .lab-technical,.lab-history,.lab-local-note{grid-column:1/-1}
 .lab-asset-top{margin-bottom:14px}
 .lab-local-note{margin:12px 0 0}
 .lab-panel h2{max-width:650px}
 .lab-workspace{gap:24px;padding-bottom:40px}
}
@media(max-width:540px){
 .lab-intro h1{font-size:2.5rem;line-height:1.05;margin:13px 0}
 .lab-intro .lab-lead{font-size:.93rem;line-height:1.65}
 .lab-intro-notes{font-size:.7rem;gap:5px 9px}
 .lab-asset{grid-template-columns:72px minmax(0,1fr);padding:16px}
 .lab-art{height:88px}
 .lab-asset-top{font-size:.6rem}
 .lab-asset-info>span{font-size:.66rem}
 .lab-chapters{gap:12px;margin-bottom:12px}
 .lab-chapters li{font-size:.72rem;gap:7px;align-items:start;flex-direction:column}
 .lab-chapter-no{width:23px;height:23px;font-size:.6rem}
 .lab-orientation{font-size:.7rem}
 .lab-panel{margin-top:12px;padding:24px 20px}
 .lab-panel h2{font-size:2rem}
 .lab-panel>p,.lab-operation>p{font-size:.9rem}
 .lab-panel>.primary-btn,.lab-operation>.primary-btn{width:100%}
 .lab-comparison{gap:8px;padding:13px}
 .lab-comparison code{font-size:.64rem}
 .lab-completion{padding:20px}
}
@media(prefers-reduced-motion:reduce){
 .lab-page *,.lab-page *::before,.lab-page *::after{transition:none!important;animation:none!important;scroll-behavior:auto!important}
}