:root{color-scheme:dark;--bg:#090b10;--card:#11141c;--line:#272c39;--text:#f4f7fb;--muted:#99a3b6;--quiet:#69758b;--accent:#b4a0ff;--green:#43e6a4;--red:#ff9d9d}
.home-link .brandmark{flex-shrink:0}.home-divider{color:#414858;margin:0 3px}.home-label{color:var(--muted)}.home-link[href]:hover .home-label{color:var(--accent)}
*{box-sizing:border-box}html{min-width:320px}body{margin:0;background:radial-gradient(ellipse at 22% -10%,#8b5cf622,transparent 48%),radial-gradient(ellipse at 90% 40%,#43e6a409,transparent 45%),var(--bg);color:var(--text);font-family:Inter,"Segoe UI","Microsoft YaHei",system-ui,sans-serif;font-size:14px}button,input{font:inherit}button,a,input{touch-action:manipulation}button,a{ -webkit-tap-highlight-color:transparent}a{color:inherit}button{cursor:pointer;color:inherit}button:disabled{cursor:default;opacity:.4}button:focus-visible,a:focus-visible,input:focus-visible,summary:focus-visible{outline:2px solid var(--accent);outline-offset:4px}[hidden]{display:none!important}.page{max-width:1160px;margin:auto;padding:30px 32px 24px}.topbar{display:flex;justify-content:space-between;align-items:center;gap:20px}.brand{display:inline-flex;align-items:center;gap:10px;font-size:13px;font-weight:650;text-decoration:none}.brandmark{display:grid;place-items:center;background:#9b7cff20;border:1px solid #9b7cff44;border-radius:10px;width:32px;height:32px;font-size:22px;color:var(--accent)}.slash{color:#414858;margin:0 3px}.muted{color:var(--muted)}.local{font-size:11px;color:var(--muted);display:flex;gap:7px;align-items:center}.local i{background:var(--green);width:6px;height:6px;border-radius:50%;box-shadow:0 0 12px #43e6a455}.hero{padding:56px 0 34px}.eyebrow{font-size:10px;letter-spacing:.15em;font-weight:700;color:var(--accent);margin-bottom:13px}h1{font-size:clamp(30px,5vw,50px);letter-spacing:-.055em;margin:0;line-height:1.2}h1 span{color:#c0adff}.hero p{color:var(--muted);line-height:1.8;margin:17px 0}.benefits{display:flex;flex-wrap:wrap;gap:8px}.benefits span{border:1px solid var(--line);border-radius:6px;background:#ffffff03;padding:5px 8px;font-size:10px;color:var(--muted)}.benefits span:before{content:'✓';color:var(--green);margin-right:5px}.workspace{display:grid;grid-template-columns:minmax(0,1.65fr) minmax(300px,1fr);gap:20px;align-items:start}.card{border:1px solid var(--line);border-radius:20px;background:linear-gradient(180deg,#ffffff02,transparent),var(--card);padding:24px;box-shadow:0 20px 50px #00000018}.section-head{display:flex;justify-content:space-between;gap:12px;align-items:center;margin-bottom:22px}h2{font-size:15px;font-weight:700;margin:0}.count{font-size:11px;color:var(--muted);padding:3px 7px;border:1px solid var(--line);border-radius:6px;margin-left:6px}.text-button{border:0;background:none;color:var(--muted);font-size:12px;padding:4px}.text-button:hover:not(:disabled){color:var(--text)}.step-label{font-size:8px;letter-spacing:.1em;color:var(--quiet)}.dropzone{display:flex;align-items:center;flex-direction:column;justify-content:center;width:100%;min-height:238px;border:1px dashed #74629480;border-radius:14px;background:#9b7cff07;transition:background .15s,border-color .15s;padding:24px 14px}.dropzone:hover:not(:disabled),.dropzone.over{background:#9b7cff15;border-color:var(--accent)}.drop-icon{color:var(--accent);display:grid;place-items:center;background:#9b7cff15;border:1px solid #9b7cff20;border-radius:15px;width:56px;height:56px;margin-bottom:20px}.drop-icon svg{width:36px;height:36px}.dropzone strong{font-size:16px;font-weight:650}.dropzone>span:not(.drop-icon){color:var(--muted);margin:10px 0 19px;font-size:12px}.dropzone small{color:var(--quiet);font-size:10px}.empty{text-align:center;padding:34px 8px 6px}.empty>span{font-size:13px;letter-spacing:.04em;color:var(--quiet)}.empty p{font-size:11px;color:var(--quiet);margin-top:14px;line-height:1.7}.list-head{display:flex;justify-content:space-between;font-size:10px;color:var(--quiet);gap:12px;margin-top:24px;margin-bottom:10px}.file-list{padding:0;margin:0;list-style:none;display:grid;gap:8px}.file-row{display:flex;align-items:center;gap:10px;border:1px solid var(--line);background:#0c1017;border-radius:11px;padding:13px 10px}.file-row.dragging{opacity:.35}.file-row.target{border-color:var(--accent);background:#9b7cff15}.file-row.incompatible{border-color:#ff9d9d55}.grip{color:var(--quiet);cursor:grab;font-size:18px;user-select:none}.number{width:24px;color:var(--accent);font-size:12px;font-variant-numeric:tabular-nums}.file-info{flex:1;min-width:0}.file-name{display:block;font-size:12px;font-weight:600;overflow:hidden;white-space:nowrap;text-overflow:ellipsis}.file-meta{font-size:10px;line-height:1.6;color:var(--quiet);margin-top:5px}.file-meta.error{color:var(--red)}.row-actions{display:flex;gap:3px}.row-actions button{border:0;border-radius:5px;background:transparent;width:25px;height:29px;font-size:14px;color:var(--muted)}.row-actions button:hover:not(:disabled){background:#ffffff09;color:var(--text)}.message{border:1px solid #ff9d9d44;border-radius:10px;background:#ff9d9d08;color:var(--red);font-size:12px;line-height:1.8;padding:12px 14px;margin-top:16px;white-space:pre-line;overflow-wrap:anywhere}.message.info{border-color:#b4a0ff44;color:var(--accent);background:#b4a0ff08}.field-label{display:block;font-size:11px;color:var(--muted);margin-bottom:10px}.gap-display{display:flex;align-items:baseline;gap:8px;margin-bottom:12px}.gap-display span:first-child{font-size:43px;letter-spacing:-.05em;font-variant-numeric:tabular-nums;font-weight:650;color:var(--accent)}.gap-display span:last-child{font-size:12px;color:var(--muted)}input[type=range]{width:100%;accent-color:var(--accent);height:8px;margin:5px 0 14px;cursor:pointer}.range-labels{display:flex;justify-content:space-between;font-size:10px;color:var(--quiet)}.presets{display:flex;gap:7px;margin-top:16px}.presets button{flex:1;border:1px solid var(--line);border-radius:8px;background:#0c1017;padding:8px;font-size:11px;color:var(--muted)}.presets button.selected{color:#d0c2ff;background:#9b7cff17;border-color:#9b7cff66}.divider{height:1px;background:var(--line);margin:23px 0}.name-input{display:flex;align-items:center;gap:8px;border:1px solid var(--line);background:#0b0e15;border-radius:9px;padding:11px 12px}.name-input input{width:100%;min-width:0;background:none;border:0;outline:none;color:var(--text);font-size:12px}.name-input:focus-within{border-color:var(--accent);outline:1px solid var(--accent)}.name-input span{color:var(--quiet);font-size:12px}.spec-box{padding:17px 0 0}.spec-box>div,.summary>div{display:flex;justify-content:space-between;gap:10px;align-items:center;margin:11px 0;font-size:11px}.spec-box span,.summary span{color:var(--quiet)}.spec-box strong{font-weight:500;text-align:right}.compatibility{font-size:10px;line-height:1.8;color:var(--quiet);margin:17px 0 20px}.compatibility.error{color:var(--red)}.compatibility.good{color:#79dcb2}.summary{border-top:1px solid var(--line);padding-top:8px;margin-bottom:17px}.summary strong{font-size:13px;font-variant-numeric:tabular-nums;font-weight:650}.primary{display:inline-flex;justify-content:center;align-items:center;gap:10px;border:1px solid #c9b5ff77;background:linear-gradient(120deg,#ad92f6,#c3b0ff);border-radius:10px;color:#21143e;font-size:12px;font-weight:750;padding:13px 18px;text-decoration:none;min-height:45px}.primary:hover:not(:disabled){filter:brightness(1.08)}#mergeBtn{width:100%}.primary:disabled{opacity:.4}.export-note{text-align:center;color:var(--quiet);font-size:9px;margin:12px 0 0;line-height:1.7}.result{margin-top:20px;border-color:#43e6a444}.result-top{display:flex;justify-content:space-between;align-items:center;gap:20px}.result .eyebrow{color:var(--green);margin-bottom:7px}.result h2{font-size:21px}.result p{color:var(--muted);font-size:12px;line-height:1.6}.result audio{width:100%;height:40px;margin-top:15px}.result .preview-note{font-size:10px;color:var(--quiet);margin-bottom:0}.details{color:var(--quiet);margin-top:27px;font-size:11px;line-height:1.9}.details summary{cursor:pointer;color:var(--muted);padding:4px 0}.details p{max-width:820px;margin:10px 0}footer{display:flex;justify-content:space-between;gap:20px;border-top:1px solid var(--line);margin-top:26px;padding-top:20px;color:var(--quiet);font-size:9px}footer span:last-child{letter-spacing:.12em}@media(max-width:860px){.workspace{grid-template-columns:1fr}.settings{max-width:none}.step-label{font-size:9px}.hero{padding-top:42px}}@media(max-width:540px){.page{padding:22px 16px}.brand{font-size:12px}.brand .slash,.brand .muted{display:none}.local{font-size:10px}.hero{padding:34px 0 27px}h1{font-size:32px}.hero p{font-size:12px}.card{padding:18px;border-radius:15px}.dropzone{min-height:210px}.list-head span:last-child{display:none}.file-row{gap:6px;padding:11px 7px}.row-actions{gap:0}.row-actions button{width:24px}.number{width:20px;font-size:10px}.grip{font-size:15px}.file-name{font-size:11px}.file-meta{font-size:9px}.result-top{align-items:stretch;flex-direction:column;gap:9px}.download{width:100%}footer{font-size:8px;gap:10px}}@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}