:root{--bg:#0a0f20;--panel:#10182b;--panel2:#121d33;--border:#27334c;--text:#f2f5ff;--muted:#96a2bb;--accent:#6ae6c6;--accent2:#5bd3be;--danger:#ffa6ad}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--text);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:radial-gradient(ellipse at 80% 0%,#17294a 0,transparent 40%),var(--bg);min-height:100vh}button,input{font:inherit}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.45}[hidden]{display:none!important}.app-shell{max-width:1310px;padding:0 32px;margin:0 auto}.topbar{height:85px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid #26314a}.brand{color:white;text-decoration:none;display:inline-flex;align-items:center;gap:11px;font-size:24px;font-weight:800;letter-spacing:-1.2px}.brand-light{font-weight:400}.brand-mark{display:grid;place-items:center;width:34px;height:34px;border-radius:10px;background:var(--accent);color:#10172d;font-size:25px}.topbar-right{font-size:11px;letter-spacing:1.4px;font-weight:800;color:#c1cedf;display:flex;align-items:center;gap:11px}.status-dot{width:7px;height:7px;background:#78ecc6;border-radius:50%;box-shadow:0 0 0 5px #78ecc622}.intro{padding:60px 0 42px}.eyebrow{font-size:12px;color:var(--accent);font-weight:800;letter-spacing:2.6px;display:flex;align-items:center;gap:14px}.eyebrow-line{width:38px;height:1px;background:var(--accent);opacity:.6}.intro h1{font-size:clamp(51px,7vw,90px);line-height:1.0;letter-spacing:-5px;margin:18px 0 18px;font-weight:850}.intro h1 span{color:var(--accent)}.intro p{color:#b8c6da;max-width:680px;font-size:16px;line-height:1.8;margin:0}.workspace{display:grid;grid-template-columns:minmax(325px,440px) minmax(0,1fr);align-items:start;gap:22px}.panel{border:1px solid var(--border);border-radius:19px;background:linear-gradient(140deg,#141e34 0%,#10172a 80%);box-shadow:0 20px 50px #05091629}.settings-panel,.preview-panel{padding:26px}.panel-heading{display:flex;justify-content:space-between;gap:10px;align-items:center;margin-bottom:22px}.panel-heading h2{font-size:18px;letter-spacing:-.4px;margin:0;font-weight:700}.panel-num{font-size:10px;color:#7f91b3;letter-spacing:1.5px;font-weight:800;white-space:nowrap}.upload-zone{background:#101b2d;border:1.5px dashed #3e5875;border-radius:13px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:6px;min-height:204px;cursor:pointer;transition:background .2s,border-color .2s;text-align:center;padding:20px}.upload-zone:hover,.upload-zone.dragging,.upload-zone:focus-visible{background:#1a3041;border-color:var(--accent);outline:none}.upload-icon{color:var(--accent);border:1px solid #4e786e;width:42px;height:42px;border-radius:13px;display:grid;place-items:center;font-size:28px;line-height:1;margin-bottom:8px}.upload-title{font-size:16px;font-weight:700}.upload-subtitle{font-size:13px;color:var(--muted)}.upload-info{font-size:10px;color:#7e92b3;margin-top:9px;letter-spacing:.3px}.files-header{margin:22px 0 12px;display:flex;justify-content:space-between;align-items:center;gap:10px;font-size:11px;font-weight:800;letter-spacing:1.2px;color:#bac9df}.count-pill{display:inline-flex;justify-content:center;align-items:center;background:#293954;border-radius:30px;min-width:22px;height:21px;margin-left:5px;color:#cddcf3}.text-btn{background:none;border:0;color:var(--accent);font-size:12px;font-weight:650;padding:5px 2px}.text-btn:hover{text-decoration:underline}.file-list{min-height:45px;max-height:255px;overflow-y:auto;display:flex;flex-direction:column;gap:7px}.empty-list{margin:4px 0 10px;color:#7486a5;font-size:13px}.file-row{padding:9px;border:1px solid #273951;border-radius:10px;display:flex;align-items:center;gap:10px;background:#121e33;width:100%;color:inherit;text-align:left}.file-row:hover,.file-row.active{border-color:#53b9a5;background:#1b2b3b}.file-row img{width:41px;height:41px;object-fit:cover;border-radius:7px;flex-shrink:0}.file-info{min-width:0;flex:1;display:flex;flex-direction:column;gap:4px}.file-info strong{font-size:12px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-weight:650}.file-info small{color:#91a2ba;font-size:11px}.file-status{font-size:10px;color:#a6b6cf;white-space:nowrap}.file-status.done{color:#75eac4}.file-status.error{color:var(--danger)}.file-status.processing{color:#f2d37e}.section-divider{height:1px;background:#29344b;margin:26px 0 23px}.setting-title{display:flex;justify-content:space-between;align-items:center;margin-bottom:17px;gap:10px}.setting-title h3{margin:0;font-size:14px;font-weight:700}.setting-title>span{color:#788daa;font-size:10px;font-weight:800;letter-spacing:1.5px}.scale-group{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.scale-group label,.format-options label{cursor:pointer;position:relative}.scale-group input,.format-options input{position:absolute;opacity:0}.scale-group span{display:grid;place-items:center;background:#10192c;border:1px solid #35425b;border-radius:9px;padding:13px;color:#b9c7dd;font-weight:800}.scale-group input:checked+span{border-color:var(--accent);background:#1c3e44;color:var(--accent);box-shadow:inset 0 0 0 1px #53bfa851}.scale-group input:focus-visible+span,.format-options input:focus-visible+span{outline:2px solid var(--accent);outline-offset:3px}.hint{color:#8497b1;font-size:11px;line-height:1.6;margin:12px 0 0}.toggle-row{display:flex;align-items:center;justify-content:space-between;gap:20px;cursor:pointer;margin:19px 0}.toggle-row strong{display:block;font-size:13px;font-weight:650}.toggle-row small{display:block;font-size:11px;color:#8495b2;margin-top:5px}.switch{position:relative;width:41px;height:24px;flex-shrink:0}.switch input{position:absolute;opacity:0}.switch i{display:block;background:#465570;width:41px;height:24px;border-radius:100px;transition:background .2s}.switch i:after{content:"";position:absolute;width:16px;height:16px;left:4px;top:4px;border-radius:50%;background:white;transition:transform .2s}.switch input:checked+i{background:#4bc6ab}.switch input:checked+i:after{transform:translateX(17px)}.switch input:focus-visible+i{outline:2px solid #b1ffe9;outline-offset:2px}.slider-field{margin:18px 0 21px}.slider-field>div{display:flex;align-items:center;justify-content:space-between;font-size:12px;margin-bottom:11px}.slider-field label{color:#c0cfe1;font-weight:600}.slider-field output{font-size:11px;color:var(--accent);font-variant-numeric:tabular-nums}.slider-field input{width:100%;height:5px;border-radius:20px;appearance:none;cursor:pointer;background:linear-gradient(to right,#65d9bd var(--fill,50%),#3a4963 var(--fill,50%))}.slider-field input::-webkit-slider-thumb{appearance:none;width:16px;height:16px;border-radius:50%;background:#e3fff9;border:3px solid #45c9aa;box-shadow:0 2px 5px #0006}.slider-field input::-moz-range-thumb{width:13px;height:13px;border-radius:50%;background:#e3fff9;border:3px solid #45c9aa}.reset-btn{margin-top:-7px}.format-options{display:grid;grid-template-columns:1fr 1fr;gap:10px}.format-options span{display:flex;align-items:center;justify-content:center;flex-direction:column;gap:4px;padding:12px;border:1px solid #3b4962;border-radius:9px;font-size:13px;font-weight:750;color:#cfdbec}.format-options small{font-size:10px;font-weight:400;color:#95a6bd}.format-options input:checked+span{border-color:var(--accent);background:#1d393f;color:var(--accent)}.primary-btn{background:var(--accent);border:0;color:#102034;border-radius:10px;padding:16px 18px;font-size:14px;font-weight:850;width:100%;display:flex;align-items:center;justify-content:center;gap:10px;margin-top:24px;transition:filter .15s}.primary-btn:hover:not(:disabled){filter:brightness(1.08)}.btn-arrow{margin-left:auto;font-size:19px}.button-note{text-align:center;color:#7e92a9;font-size:10px;line-height:1.5;margin:13px 0 0}.preview-panel{position:sticky;top:20px}.preview-stage{border:1px solid #283955;background:repeating-conic-gradient(#162137 0% 25%,#1a273e 0% 50%) 50%/24px 24px;position:relative;aspect-ratio:5/4;border-radius:12px;overflow:hidden;isolation:isolate;display:grid;place-items:center}.preview-stage img{position:absolute;width:100%;height:100%;inset:0;object-fit:contain}.preview-stage #after-img{clip-path:inset(0 calc(100% - var(--split)) 0 0);z-index:2}.preview-placeholder{text-align:center;padding:26px;max-width:290px;z-index:0}.placeholder-icon{color:#426b75;font-size:70px;line-height:1.2}.preview-placeholder h3{font-size:17px;margin:12px 0 8px;color:#afc1d4}.preview-placeholder p{color:#7f91ac;font-size:12px;line-height:1.7}.split-line{position:absolute;top:0;bottom:0;left:var(--split);width:2px;background:#f9ffff;z-index:4;box-shadow:0 0 13px #030f2a;pointer-events:none;transform:translateX(-50%)}.split-handle{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);border:2px solid white;border-radius:50%;background:#223f4c;color:#fff;width:44px;height:44px;display:grid;place-items:center;font-size:23px;box-shadow:0 3px 15px #0008}.preview-tag{position:absolute;top:14px;background:#10182bc9;border:1px solid #ffffff33;padding:8px 9px;border-radius:6px;font-size:10px;font-weight:850;letter-spacing:1px;z-index:3}.tag-before{right:14px}.tag-after{left:14px;color:var(--accent)}#compare-range{position:absolute;inset:0;width:100%;height:100%;z-index:5;opacity:0;cursor:ew-resize;appearance:none;margin:0}.preview-caption{display:flex;align-items:center;justify-content:space-between;gap:10px;margin:17px 0;font-size:11px;color:#a8b9ce}.preview-caption>div{display:flex;align-items:center;gap:6px}.legend-dot{display:inline-block;width:8px;height:8px;border-radius:50%}.legend-dot.original{background:#8b9eb8}.legend-dot.improved{background:var(--accent)}.preview-caption span[id]{font-size:11px;color:#e5edf8;font-variant-numeric:tabular-nums}.message{padding:15px 17px;background:#16253e;border:1px solid #294568;border-radius:10px;font-size:12px;line-height:1.6;color:#c2d0e2;margin:20px 0}.message.success{background:#19372f;border-color:#327d62;color:#a8f4cf}.message.error{background:#3c242e;border-color:#845260;color:#ffbdc2}.progress-track{height:6px;background:#34425d;border-radius:100px;overflow:hidden;margin:18px 0}.progress-fill{height:100%;width:0;background:var(--accent);transition:width .25s}.download-actions{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:15px}.secondary-btn{border:1px solid #52637b;color:#d7e5f4;background:#1e2a40;padding:15px 10px;border-radius:10px;font-size:12px;font-weight:700}.secondary-btn:hover:not(:disabled){background:#29405a;border-color:#80a9b4}.spec-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;padding:30px 0 8px;margin-top:24px;border-top:1px solid #28374e}.spec-grid>div{display:flex;flex-direction:column;gap:7px}.spec-grid span{font-size:9px;letter-spacing:1.1px;color:#7189a8;font-weight:800}.spec-grid strong{font-size:12px;font-weight:650;color:#bdcddd}footer{color:#6e819e;text-align:center;padding:50px 0 35px;font-size:12px}
@media(max-width:940px){.workspace{grid-template-columns:1fr}.preview-panel{position:static;order:-1}.preview-stage{aspect-ratio:16/10}.intro{padding:45px 0 33px}}
@media(max-width:560px){.app-shell{padding:0 14px}.topbar{height:70px}.topbar-right{font-size:8px;letter-spacing:.4px}.brand{font-size:20px}.intro h1{font-size:58px;letter-spacing:-3px}.intro p{font-size:14px}.settings-panel,.preview-panel{padding:16px}.panel-heading h2{font-size:16px}.panel-num{font-size:9px}.preview-stage{aspect-ratio:4/4}.preview-caption{font-size:10px}.download-actions{grid-template-columns:1fr}.spec-grid{gap:6px}.spec-grid strong{font-size:11px}}