:root{--bg:#f1f0eb;--panel:#faf9f5;--ink:#171a1d;--muted:#62676a;--line:#c9c8c1;--accent:#c8f04a;--blue:#57c7d4;--red:#f06449}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font-family:Arial,"Helvetica Neue",sans-serif}.topbar{height:64px;padding:0 clamp(18px,4vw,64px);display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--ink);position:sticky;top:0;z-index:20;background:rgba(241,240,235,.95);backdrop-filter:blur(8px)}.brand{color:inherit;text-decoration:none;font:800 13px Consolas,monospace;letter-spacing:.07em}.brand span{color:var(--muted);font-weight:400}.topbar nav{display:flex;align-items:center;gap:25px}.topbar nav a{font-size:13px;color:inherit;text-decoration:none}.topbar button,.workspace-bar button{border:0;background:none;padding:0;font-size:12px;text-decoration:underline;cursor:pointer}.intro{min-height:68vh;padding:clamp(70px,10vw,140px) clamp(20px,8vw,130px);border-bottom:1px solid var(--ink)}.kicker,.section-title>p,.demo header div>p{font:700 11px Consolas,monospace;letter-spacing:.12em;margin:0 0 18px}.intro h1{font-size:clamp(55px,9vw,130px);line-height:.82;letter-spacing:-.075em;margin:0}.intro>p:not(.kicker){max-width:580px;font:20px/1.55 Georgia,serif;margin:36px 0}.button{display:inline-block;border:1px solid var(--ink);background:var(--panel);padding:11px 16px;color:inherit;text-decoration:none;font-size:12px;font-weight:700;cursor:pointer}.button.primary{background:var(--accent);box-shadow:4px 4px 0 var(--ink)}.wrap{padding:85px clamp(18px,6vw,95px)}.section-title{margin-bottom:35px}.section-title h2{font-size:clamp(36px,5vw,66px);letter-spacing:-.05em;margin:0}.module-grid{display:grid;grid-template-columns:repeat(3,1fr);border-left:1px solid var(--ink);border-top:1px solid var(--ink)}.module-grid button{min-height:175px;padding:22px;border:0;border-right:1px solid var(--ink);border-bottom:1px solid var(--ink);background:transparent;text-align:left;display:grid;grid-template-columns:38px 1fr;align-content:start;cursor:pointer}.module-grid button:hover,.module-grid button:focus-visible{background:var(--accent)}.module-grid b{grid-row:1/3;font:500 11px Consolas,monospace}.module-grid span{font-size:21px;font-weight:700;letter-spacing:-.02em}.module-grid small{grid-column:2;margin-top:38px;color:var(--muted);font-size:12px}.workspace{padding-top:30px}.workspace-bar{display:flex;justify-content:space-between;padding-bottom:25px;border-bottom:1px solid var(--ink);font:12px Consolas,monospace}.demo{display:none;padding-top:55px}.demo.active{display:block}.demo>header{display:flex;align-items:end;justify-content:space-between;gap:40px;margin-bottom:30px}.demo>header h2{font-size:clamp(37px,5vw,68px);letter-spacing:-.05em;margin:0}.demo>header>p{max-width:420px;margin:0;color:var(--muted);font:17px/1.5 Georgia,serif}.lab{display:grid;grid-template-columns:minmax(0,1.7fr) minmax(275px,.65fr);gap:20px}.lab figure,.dual figure{margin:0;border:1px solid var(--ink);background:#242b2e}.lab canvas,.dual canvas,.pipeline-grid>canvas{display:block;width:100%;height:auto}.lab figcaption,.dual figcaption{padding:10px 13px;color:#e8e8e2;border-top:1px solid #777;font:10px Consolas,monospace;text-transform:uppercase}.lab aside,.pipeline-grid aside{background:var(--panel);border:1px solid var(--ink);padding:24px}.lab aside>label,.pipeline-grid aside>label{display:block;margin-bottom:26px}.lab label>span,.pipeline-grid label>span{display:flex;justify-content:space-between;margin-bottom:9px;font:700 11px Consolas,monospace;text-transform:uppercase}.lab input[type=range],.pipeline-grid input[type=range]{width:100%;accent-color:var(--ink)}select{width:100%;padding:10px;border:1px solid var(--ink);background:white}.options{display:flex;flex-wrap:wrap;margin-bottom:28px}.options button{flex:1;border:1px solid var(--ink);background:white;padding:9px 6px;font-size:11px;cursor:pointer}.options button.active{background:var(--ink);color:var(--accent)}.check{display:flex!important;align-items:center;gap:10px;border-top:1px solid var(--line);padding-top:16px}.check span{margin:0!important}.note{border-top:1px solid var(--ink);padding-top:16px;margin-top:22px}.note b{font:700 10px Consolas,monospace;text-transform:uppercase}.note p{font:15px/1.45 Georgia,serif;margin-bottom:0}.stack{display:flex;flex-direction:column}.stack canvas+canvas{border-top:1px solid #777}.dual{display:grid;grid-template-columns:1fr 1fr;gap:20px}.dual figure{margin:0}.inline-controls{display:flex;gap:25px;align-items:center;margin-top:20px;color:var(--muted);font-size:13px}.metric{display:flex;justify-content:space-between;align-items:end;border-top:1px solid var(--ink);padding-top:18px;margin-top:25px}.metric span{font:700 10px Consolas,monospace;text-transform:uppercase}.metric strong{font-size:28px}.palette{display:flex;padding:12px;background:var(--panel);gap:7px}.palette button{height:40px;flex:1;border:2px solid transparent;cursor:pointer}.palette button.off{opacity:.3;border-color:var(--ink)}.shapes{font:11px/1.8 Consolas,monospace;border:1px solid var(--line);padding:12px;background:white}.pipeline-grid{display:grid;grid-template-columns:minmax(0,2fr) minmax(280px,.65fr);gap:20px}.pipeline-grid>canvas{background:#252c2f;border:1px solid var(--ink)}footer{display:flex;justify-content:space-between;padding:26px clamp(18px,6vw,95px);border-top:1px solid var(--ink);font:10px Consolas,monospace;text-transform:uppercase}.presenting .topbar,.presenting footer,.presenting .workspace-bar{display:none}.presenting .workspace{padding-top:20px}.presenting .demo>header{margin-bottom:18px}
@media(max-width:900px){.module-grid{grid-template-columns:repeat(2,1fr)}.lab,.pipeline-grid{grid-template-columns:1fr}.demo>header{align-items:start;flex-direction:column}.dual{grid-template-columns:1fr}}
@media(max-width:560px){.topbar nav a{display:none}.module-grid{grid-template-columns:1fr}.intro h1{font-size:54px}.wrap{padding-left:15px;padding-right:15px}.inline-controls,footer{align-items:start;flex-direction:column}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
.workspace-bar{align-items:center;gap:20px}.upload-control{display:flex;align-items:center;gap:10px}.upload-control label{border:1px solid var(--ink);background:var(--accent);padding:8px 11px;font-weight:700;cursor:pointer}.upload-control input{position:absolute;width:1px;height:1px;opacity:0}.upload-control span{max-width:220px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:var(--muted)}.upload-control button{color:var(--muted)}
.upload-control{padding:4px;border:2px dashed transparent;transition:background .12s,border-color .12s}.upload-control.dragging{background:#e7f8ad;border-color:var(--ink)}.upload-control.dragging label{background:var(--ink);color:var(--accent)}
@media(max-width:560px){.workspace-bar{align-items:flex-start;flex-wrap:wrap}.upload-control{order:3;width:100%}}
.dropzone{position:relative;outline:0 solid var(--accent);transition:outline-width .12s}.dropzone.dragging{outline-width:6px}.dropzone.dragging:after{content:"DROP IMAGE";position:absolute;inset:0;display:grid;place-items:center;background:rgba(23,26,29,.72);color:var(--accent);font:700 14px Consolas,monospace;letter-spacing:.12em;pointer-events:none}
.template-figure{background:var(--panel)!important}.template-layout{display:grid;grid-template-columns:minmax(0,3fr) minmax(150px,1fr);gap:12px;padding:12px}.template-main{display:grid;gap:12px}.template-main>div,.template-side{background:#242b2e}.template-main canvas,.template-side canvas{display:block;width:100%;height:auto}.template-side{align-self:start;padding-bottom:12px}.template-side p{color:#d7d9d5;font:11px/1.45 Consolas,monospace;padding:0 12px}.canvas-label{display:block;color:#e8e8e2;padding:8px 10px;border-bottom:1px solid #62686a;font:10px Consolas,monospace;letter-spacing:.08em}.template-figure figcaption{background:#242b2e}@media(max-width:700px){.template-layout{grid-template-columns:1fr}.template-side canvas{max-width:240px}}
.global-upload{min-height:58px;padding:8px clamp(18px,4vw,64px);display:flex;align-items:center;justify-content:space-between;gap:20px;border-bottom:1px solid var(--ink);background:var(--panel);position:sticky;top:64px;z-index:19}.global-upload>span{font:10px Consolas,monospace;color:var(--muted);text-transform:uppercase}.catalog{padding-top:55px}.presenting .global-upload{display:none}@media(max-width:600px){.global-upload{align-items:flex-start;flex-direction:column;top:64px}.global-upload>span{display:none}}
.geometry-controls{display:flex;align-items:center;justify-content:space-between;gap:25px;margin-bottom:18px}.geometry-controls .options{width:min(420px,100%);margin:0}.geometry-controls>span{font:12px Consolas,monospace;color:var(--muted)}@media(max-width:700px){.geometry-controls{align-items:flex-start;flex-direction:column}}
.kmeans-figure{background:var(--panel)!important}.kmeans-images{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:var(--ink)}.kmeans-images>div{background:#242b2e}.kmeans-images canvas{display:block;width:100%;height:auto}.kmeans-palette-head{display:flex;justify-content:space-between;gap:15px;padding:12px 14px 4px;font:10px Consolas,monospace;color:var(--muted)}.kmeans-figure .palette{padding:10px 14px 15px}.kmeans-figure .palette button{position:relative;min-width:65px;height:72px;padding:0;border:2px solid var(--ink);overflow:hidden}.kmeans-figure .palette button.off:after{content:"OFF";position:absolute;inset:0;display:grid;place-items:center;background:rgba(244,241,232,.76);color:var(--ink);font:800 10px Consolas,monospace}.cluster-meta{position:absolute;left:0;right:0;bottom:0;padding:5px 3px;background:rgba(15,20,23,.78);color:#fff;font:9px Consolas,monospace;text-align:center}.kmeans-figure.dragging{outline:6px solid var(--accent)}.kmeans-upload-button{display:block;border:1px solid var(--ink);background:var(--accent);padding:11px 14px;margin-bottom:12px;font-size:12px;font-weight:700;text-align:center;cursor:pointer}.visually-hidden{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap}.fixed-property{border:1px solid var(--line);padding:13px;margin-bottom:25px;background:#fff}.fixed-property span,.fixed-property small{display:block;font:9px Consolas,monospace;color:var(--muted)}.fixed-property strong{display:block;margin:6px 0;font-size:14px}.size-detail{margin-top:8px;color:var(--muted);font:10px/1.45 Consolas,monospace}@media(max-width:720px){.kmeans-images{grid-template-columns:1fr}.kmeans-palette-head{align-items:flex-start;flex-direction:column}.kmeans-figure .palette{overflow-x:auto}}
.course-materials{color:var(--muted);text-transform:none;max-width:100%;margin:0 16px}.course-materials summary{cursor:pointer}.course-materials ul{list-style:none;margin:12px 0 0;padding:0;line-height:1.8}.course-materials a{color:inherit;overflow-wrap:anywhere}.course-materials a:hover{color:var(--ink)}.course-materials summary:focus-visible,.course-materials a:focus-visible{outline:2px solid var(--ink);outline-offset:3px}@media(max-width:560px){.course-materials{margin:12px 0}}