@font-face{font-family:LabSans;src:local("Segoe UI");font-display:swap}
:root{--bg:#f6f7fb;--ink:#232535;--muted:#7a7d8d;--line:#e9eaf1;--purple:#7955d8;--purple-light:#f1ecfb;--teal:#339e95;--white:#fff;--radius:13px;font-family:LabSans,"Segoe UI",Arial,sans-serif;color:var(--ink);background:var(--bg);font-size:14px;font-synthesis:none}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:28px}body{margin:0}button,input,select{font:inherit}button,a,select,input{touch-action:manipulation}button,a,select{ -webkit-tap-highlight-color:transparent}button{cursor:pointer}a{color:inherit;text-decoration:none}button:focus-visible,a:focus-visible,select:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid #a897e8;outline-offset:4px}button:disabled{cursor:wait;opacity:.55}.app-shell{max-width:1920px;margin:auto}.sidebar{position:fixed;inset:0 auto 0 max(0px,calc((100vw - 1920px)/2));width:232px;background:#fff;border-right:1px solid var(--line);display:flex;flex-direction:column;padding:35px 21px 25px;z-index:5}.brand{display:flex;gap:11px;align-items:center;padding-left:9px;font-size:30px;font-weight:700;letter-spacing:-1.5px}.brand-symbol{width:39px;height:42px;display:grid;place-items:center;border-radius:12px;background:var(--purple);color:white;font-size:38px;font-weight:400;line-height:1}.brand-dot{color:var(--purple)}.brand small{display:block;font-size:8px;letter-spacing:1.5px;font-weight:600;margin-top:1px;color:#8c8b99}.sidebar-label{font-size:9px;font-weight:700;color:#a1a1b0;letter-spacing:1.6px;margin:54px 10px 18px}nav{display:grid;gap:9px}.nav-link{display:flex;align-items:center;gap:12px;padding:13px 12px;color:#858492;font-size:12px;border-radius:8px}.nav-link>span{font-size:19px;line-height:1;width:19px;text-align:center}.nav-link:hover{background:#f7f5fc;color:var(--purple)}.nav-link.active{background:var(--purple-light);color:var(--purple);font-weight:600}.sidebar-note{margin:auto 8px 26px;padding-top:45px;font-size:10px;color:#67677a}.status-dot{display:inline-block;width:6px;height:6px;background:#48ac91;border-radius:50%;margin-right:6px;vertical-align:middle}.sidebar-note p{line-height:1.9;color:#a0a0ae;margin-left:12px;font-size:11px}.author{display:flex;gap:11px;align-items:center;border-top:1px solid var(--line);padding:24px 5px 0;font-size:11px;font-weight:600;line-height:1.65}.avatar{display:grid;place-items:center;flex:none;width:35px;height:35px;border-radius:50%;background:#efebf8;color:var(--purple);font-size:11px}.author small{display:block;color:#9693a5;font-weight:400;font-size:10px}main{margin-left:232px;padding:0 42px;max-width:1688px}.topbar{height:76px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);font-size:10px;color:#9898a7}.breadcrumb span{margin:0 12px;color:#c3c1ce}.breadcrumb strong{font-weight:500;color:#676879}.course-badge{background:white;border:1px solid var(--line);padding:7px 11px;border-radius:6px;font-size:9px;color:#7b788e}.heading{display:flex;justify-content:space-between;align-items:center;padding:37px 0 30px;gap:20px}.eyebrow{font-size:9px;color:var(--purple);letter-spacing:1.7px;font-weight:700;margin-bottom:13px}h1{font-weight:650;font-size:clamp(25px,2.5vw,39px);letter-spacing:-1.4px;margin:0 0 13px;line-height:1.22}h1>span{color:var(--purple)}.heading p{font-size:12px;line-height:1.9;color:var(--muted);margin:0}.button{display:inline-flex;align-items:center;justify-content:center;gap:9px;padding:11px 16px;border-radius:7px;border:1px solid var(--line);font-size:11px;font-weight:500;white-space:nowrap;transition:background .15s}.button-white{background:#fff;color:#5a586f}.button-white:hover{background:var(--purple-light);border-color:#dbd0f7}.report-link{margin-top:18px}.mobile-break{display:none}.control-panel{display:grid;grid-template-columns:1fr 1.4fr .95fr;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px 0;margin:0 0 30px;box-shadow:0 3px 12px #28224402}.control-panel>div{padding:0 24px}.control-panel>div+div{border-left:1px solid var(--line)}.field-label{color:#aaa6b9;font-size:10px;display:flex;gap:8px;align-items:center;font-weight:500;min-height:27px;margin-bottom:13px}.field-label>span{color:#5d5b70;font-size:11px}.field-hint{font-size:9px;color:#a2a0af;display:block;margin-top:10px}.control-image select{width:100%;padding:9px 25px 9px 10px;border:1px solid var(--line);border-radius:6px;background:#fcfcfe;color:#626072;font-size:11px}.upload-button{margin-top:9px;padding:6px 0;border:0;background:none;color:var(--purple);font-size:10px;font-weight:500}.upload-button span{padding-right:5px}#percent-output{margin-left:auto;color:var(--purple);font-size:25px;font-weight:600;line-height:1}#percent-output span{font-size:13px;margin-left:2px}.control-compression input{width:100%;accent-color:var(--purple);height:5px;cursor:pointer;margin:13px 0 10px}.range-scale{display:flex;justify-content:space-between;font-size:9px;color:#aaa7b5}.presets{display:flex;gap:7px;margin-top:14px}.presets button{padding:4px 12px;background:#fafafe;border:1px solid var(--line);border-radius:5px;color:#8d899b;font-size:9px;min-width:45px}.presets button:hover,.presets button.selected{background:var(--purple-light);border-color:#d9cdf3;color:var(--purple)}.select-row{display:flex;align-items:center;justify-content:space-between;font-size:10px;color:#8c879b;gap:6px;margin-bottom:8px}.select-row select{width:86px;background:#fcfcfe;border:1px solid var(--line);border-radius:5px;padding:5px 8px;color:#676276;font-size:10px}.section-bar{display:flex;justify-content:space-between;align-items:center;gap:15px;margin-bottom:17px}h2{font-size:16px;letter-spacing:-.3px;font-weight:600;margin:0}.processing-state{font-size:9px;color:#8b8999}.processing-state.busy .status-dot{background:#bc9d57;animation:pulse 1s infinite}@keyframes pulse{50%{opacity:.3}}.image-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.image-card{overflow:hidden;background:white;border:1px solid var(--line);border-radius:var(--radius)}.card-heading{display:flex;align-items:center;justify-content:space-between;padding:16px 15px;gap:5px}.card-heading>div{display:flex;align-items:center;gap:6px}.method-dot{display:inline-block;width:7px;height:7px;border-radius:50%;flex:none}.original-dot{background:#9294a5}.dct-dot{background:var(--purple)}.dwt-dot{background:var(--teal)}h3{font-size:13px;margin:0;font-weight:600}.method-subtitle{font-size:9px;color:#a09aaa;margin-left:3px}.tag{font-size:8px;letter-spacing:.1px;color:#8d8b99;background:#f5f5f8;padding:5px 7px;border-radius:4px;white-space:nowrap}.tag-purple{background:var(--purple-light);color:var(--purple)}.tag-teal{background:#eaf6f3;color:var(--teal)}.canvas-button{position:relative;display:block;width:calc(100% - 20px);margin:0 10px;padding:0;border:0;border-radius:5px;overflow:hidden;background:#ececf0;aspect-ratio:1}.canvas-button canvas{display:block;width:100%;height:100%;object-fit:contain;image-rendering:auto}.zoom-hint{position:absolute;right:9px;bottom:9px;color:white;font-size:10px;background:#232534a8;padding:6px 8px;border-radius:5px;opacity:0;transition:opacity .2s}.canvas-button:hover .zoom-hint,.canvas-button:focus-visible .zoom-hint{opacity:1}.card-data{padding:18px 17px 16px;min-height:125px}.metric-main,.metric-detail{display:flex;align-items:center;justify-content:space-between}.metric-main>span{color:#9a96a8;font-size:10px}.metric-main>strong{font-weight:600;font-size:26px;letter-spacing:-.7px}.metric-main small{font-size:10px;color:#a8a2b6;font-weight:400;letter-spacing:0}.dct-card .metric-main>strong{color:var(--purple)}.dwt-card .metric-main>strong{color:var(--teal)}.info{font-size:10px;cursor:help}.metric-detail{margin-top:12px;font-size:9px;color:#a7a1b2;gap:5px}.metric-detail strong{font-size:10px;color:#666174;font-weight:500;white-space:nowrap}.coefficient-track{height:3px;background:#f1eff7;margin-top:11px;border-radius:2px;overflow:hidden}.coefficient-track span{display:block;background:var(--purple);height:100%;transition:width .2s}.dwt-card .coefficient-track span{background:var(--teal)}.nonzero{font-size:8px;color:#aaa4b7;margin-top:7px}.comparison-foot{display:flex;justify-content:space-between;gap:15px;align-items:center;margin:14px 0 37px}.comparison-foot p{font-size:10px;color:#9690a5;line-height:1.6;margin:0}.text-button{border:0;background:transparent;color:var(--purple);font-size:10px;white-space:nowrap;padding:8px 0}.text-button:hover{text-decoration:underline}.experiments-section{border-top:1px solid var(--line);padding-top:29px}.experiments-section .eyebrow{margin-bottom:8px;font-size:8px}.experiments-section h2{font-size:20px;letter-spacing:-.6px}.section-description{font-size:11px;color:#9690a4;margin:0 0 20px}.experiments-layout{display:grid;grid-template-columns:1.12fr 1fr;gap:20px}.table-wrap{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}table{width:100%;border-collapse:collapse;font-size:11px;text-align:left}th{background:#fbfbfe;font-size:9px;font-weight:500;color:#a19bad;padding:17px 15px;border-bottom:1px solid var(--line);white-space:nowrap}th .method-dot{width:5px;height:5px;margin-right:6px}td{padding:19px 15px;border-bottom:1px solid #f2f0f6;color:#655e76}tbody tr{cursor:pointer}tbody tr:hover,tbody tr.active-row{background:#faf8ff}td:first-child{font-weight:600;color:#50465f}td:nth-child(3){color:var(--purple);font-weight:600}td:nth-child(4){color:var(--teal);font-weight:600}.row-button{border:0;background:transparent;color:inherit;font:inherit;padding:2px;cursor:pointer}.table-note{font-size:8px;color:#aaa3b7;padding:11px 15px;margin:0}.chart-card{padding:18px 20px 12px;background:#fff;border:1px solid var(--line);border-radius:var(--radius)}.chart-title{font-size:10px;font-weight:600;display:flex;justify-content:space-between}.chart-title span{font-size:8px;font-weight:400;color:#a6a0b3}#quality-chart{display:block;width:100%;height:190px;overflow:visible}.chart-legend{display:flex;gap:18px;justify-content:center;font-size:8px;color:#92899e}.chart-legend span{display:flex;align-items:center;gap:5px}.chart-legend i{width:13px;height:3px;border-radius:2px}.info-strip{margin:17px 0 34px;padding:12px 16px;display:flex;gap:10px;background:#efedf7;border:1px solid #e9e5f3;border-radius:8px;color:#978cae}.info-strip>span{margin-top:2px;font-size:12px}.info-strip p{font-size:9px;line-height:1.9;margin:0}.info-strip strong{color:#827498;font-weight:600}.theory-section{padding-top:26px;border-top:1px solid var(--line)}.theory-section h2{font-size:21px;margin-bottom:21px}.theory-section .eyebrow{font-size:8px;margin-bottom:9px}.theory-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.theory-grid article{padding:22px;background:#fff;border:1px solid var(--line);border-radius:var(--radius)}.theory-icon{display:grid;place-items:center;width:31px;height:31px;font-size:24px;border-radius:8px;margin-bottom:16px}.purple-icon{background:var(--purple-light);color:var(--purple)}.teal-icon{background:#eaf6f3;color:var(--teal)}.neutral-icon{background:#f0eff4;color:#8a8299}.theory-grid h3{font-size:11px;margin-bottom:10px}.theory-grid p{font-size:10px;line-height:1.9;color:#9b93a8;min-height:76px;margin:0 0 13px}.theory-grid code{display:block;color:#82728e;background:#f8f7fb;padding:10px;font-size:10px;line-height:1.9;border-radius:6px}details{margin-top:18px;font-size:11px;color:#91869f;border:1px solid var(--line);border-radius:8px;padding:15px 18px}summary{cursor:pointer;font-size:11px;color:#7d718d}details p{font-size:11px;line-height:1.9;margin-bottom:0}footer{display:flex;justify-content:space-between;gap:20px;color:#a29baa;font-size:9px;line-height:1.8;margin:31px 0 0;padding:22px 0;border-top:1px solid var(--line)}dialog{border:1px solid var(--line);border-radius:14px;padding:20px;max-width:95vw;max-height:95vh;box-shadow:0 20px 80px #1511233d;background:#fff;color:var(--ink)}dialog::backdrop{background:#20203099;backdrop-filter:blur(4px)}.dialog-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:15px;gap:35px}.dialog-header button{border:0;background:#f4f2f8;border-radius:50%;width:30px;height:30px;color:#837594}dialog canvas{display:block;max-width:100%;height:auto;image-rendering:pixelated}dialog p{font-size:10px;color:var(--muted);margin-bottom:0}.toast{position:fixed;bottom:25px;left:50%;transform:translateX(-50%);padding:13px 20px;border-radius:9px;background:#302940;color:#fff;box-shadow:0 8px 30px #32243b33;z-index:20;font-size:12px;max-width:90vw}.toast[hidden]{display:none}
@media(min-width:1550px){main{padding:0 55px}.heading{padding-top:44px;padding-bottom:35px}.control-panel{padding:27px 0}.card-heading{padding:19px}.card-data{padding:20px}.canvas-button{width:calc(100% - 24px);margin:0 12px}.method-subtitle{font-size:10px}.control-panel>div{padding:0 30px}}
@media(max-width:1250px){.sidebar{width:200px;padding-left:14px;padding-right:14px}main{margin-left:200px;padding:0 27px}.method-subtitle{display:none}.control-panel>div{padding:0 17px}.heading p{font-size:11px}.image-grid{gap:13px}.card-data{padding:15px 12px}.metric-detail{font-size:8px}.metric-detail strong{font-size:9px}.experiments-layout{gap:14px}th,td{padding-left:12px;padding-right:12px}}
@media(max-width:1000px){.sidebar{width:77px;padding:25px 12px}.brand{padding:0;justify-content:center}.brand>span:last-child,.sidebar-label,.nav-link:not(.active),.sidebar-note,.author{display:none}nav{margin-top:45px}.nav-link{justify-content:center;padding:14px 0;font-size:0;gap:0}.nav-link>span{font-size:23px}.brand-symbol{width:39px}.nav-link.active{font-size:0}main{margin-left:77px;padding:0 24px}.heading h1{font-size:30px}.report-link{display:none}.experiments-layout{grid-template-columns:1fr 1fr}.metric-main>strong{font-size:23px}.field-label{font-size:9px}.field-label>span{font-size:10px}.control-panel>div{padding:0 14px}.presets{gap:4px}.presets button{padding:4px 8px;min-width:38px}.theory-grid{gap:12px}.theory-grid article{padding:17px}.theory-grid p{min-height:110px}.comparison-foot p{max-width:65%}}
@media(max-width:760px){.sidebar{position:static;width:auto;height:68px;padding:12px 20px;flex-direction:row;border-right:0;border-bottom:1px solid var(--line);align-items:center;justify-content:space-between}.brand{font-size:25px;gap:8px}.brand>span:last-child{display:block}.brand small{font-size:6px}.brand-symbol{width:32px;height:34px;font-size:30px;border-radius:10px}nav{display:flex;margin:0;gap:2px}.nav-link,.nav-link:not(.active){display:flex;gap:0;font-size:0;padding:9px 12px}.nav-link>span{font-size:20px}.nav-link.active{font-size:0}main{margin-left:0;padding:0 20px}.topbar{height:53px}.breadcrumb{font-size:9px}.course-badge{font-size:8px}.heading{padding:28px 0 25px}.eyebrow{font-size:8px;letter-spacing:1.4px}.heading h1{font-size:30px;letter-spacing:-1px}.heading p{font-size:11px}.control-panel{grid-template-columns:1fr 1fr;padding:20px 0;margin-bottom:26px}.control-panel>div{padding:0 18px}.control-compression{border-left:1px solid var(--line)}.control-panel>.control-wavelet{grid-column:1/-1;border-left:0;border-top:1px solid var(--line);margin:18px 18px 0;padding:15px 0 0;display:flex;gap:20px;align-items:center}.control-wavelet .field-label{margin:0}.control-wavelet .field-hint{display:none}.control-wavelet .select-row{margin:0;gap:10px}.select-row select{width:75px}.image-grid{gap:10px}.card-heading{padding:12px 9px}.card-heading h3{font-size:11px}.tag{font-size:7px;padding:4px 5px}.card-heading>div{gap:4px}.canvas-button{width:calc(100% - 12px);margin:0 6px}.card-data{padding:12px 9px;min-height:120px}.metric-main>strong{font-size:20px}.metric-main small{font-size:8px}.metric-main>span{font-size:8px}.metric-detail{display:block;font-size:8px;margin-top:8px}.metric-detail strong{display:block;margin-top:4px}.nonzero{font-size:7px}.comparison-foot{margin-bottom:26px}.comparison-foot p,.text-button{font-size:9px}.experiments-layout{grid-template-columns:1fr 1fr}.chart-card{padding:17px 12px 12px}th,td{padding:15px 9px;font-size:10px}th{font-size:8px}.table-note{font-size:8px;padding:12px 9px}.chart-title{font-size:9px}#quality-chart{height:178px}.theory-grid{grid-template-columns:1fr}.theory-grid article{display:grid;grid-template-columns:35px 1fr;column-gap:14px;align-items:start}.theory-grid p,.theory-grid code{grid-column:2}.theory-grid p{min-height:auto;margin:0 0 10px}.theory-grid h3{margin:6px 0 13px}.theory-icon{grid-row:1/4;margin:0}.theory-grid code{font-size:10px}footer{font-size:8px;display:block}footer span{display:block}.zoom-hint{display:none}}
@media(max-width:520px){main{padding:0 14px}.sidebar{padding:12px 14px}.breadcrumb span{margin:0 6px}.course-badge{display:none}.mobile-break{display:block}.heading h1{font-size:32px}.desktop-break{display:none}.heading p{max-width:320px}.control-panel>div{padding:0 13px}.field-label{gap:4px}.field-label>span{font-size:9px}#percent-output{font-size:23px}.presets{gap:4px}.presets button{min-width:31px;padding:4px 6px}.range-scale{font-size:7px}.control-panel>.control-wavelet{gap:14px;margin-left:13px;margin-right:13px;flex-wrap:wrap}.control-wavelet .field-label{display:none}.select-row{font-size:9px}.image-grid{gap:6px}.card-heading{padding:10px 6px;min-height:39px}.card-heading .method-dot{display:none}.card-heading .tag{font-size:6px;padding:3px 4px}.card-heading h3{font-size:10px}.canvas-button{width:calc(100% - 8px);margin:0 4px}.card-data{padding:10px 7px;min-height:111px}.metric-main{display:block}.metric-main>strong{display:block;font-size:21px;margin-top:3px}.metric-main>span{font-size:8px}.metric-detail{font-size:7px}.metric-detail strong{font-size:8px}.nonzero{font-size:6px;line-height:1.6}.processing-state{font-size:7px}h2{font-size:13px}.section-bar{gap:7px}.comparison-foot{align-items:flex-start;gap:10px;flex-direction:column;margin-top:12px}.comparison-foot p{max-width:100%;font-size:9px}.comparison-foot .text-button{align-self:flex-end;padding-top:0}.experiments-section h2{font-size:19px}.section-description{font-size:10px;line-height:1.7}.experiments-layout{grid-template-columns:1fr}.experiments-section .eyebrow{font-size:7px}.button{font-size:9px;padding:10px 12px}.chart-title{font-size:10px}#quality-chart{height:200px}th,td{padding:17px;font-size:11px}th{font-size:9px}.table-note{padding:13px 17px;font-size:8px}.info-strip{padding:11px}.info-strip p{font-size:8px}.theory-section h2{font-size:20px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation:none!important;transition:none!important}}
