:root{color-scheme:dark;--bg:#141617;--panel:#1c1f20;--line:#3d4142;--muted:#b8bebc;--text:#f4f3ed;--gold:#e2c48a}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:"Noto Sans JP","Yu Gothic",Meiryo,sans-serif;font-size:16px;line-height:1.7}button,input{font:inherit}button,a,input,summary{ -webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:not-allowed}button:focus-visible,a:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid var(--gold);outline-offset:5px}button{border:0}.development{padding:10px 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20px}h2{font-size:19px;font-weight:600;margin:0}h3{font-size:16px;font-weight:500;margin:0 0 10px}.text-button,.inline-button{color:var(--text);background:transparent;padding:6px 0;text-align:left}.text-button:hover,.inline-button:hover{text-decoration:underline}.badge{font-size:12px;padding:4px 8px;border:1px solid var(--line);border-radius:5px;color:#d0d3cd;white-space:nowrap}.intro .badge{margin:0 8px}.steps{display:flex;gap:0;margin:0 0 20px;padding:0;list-style:none}.steps li{flex:1;border-top:1px solid var(--line);padding:16px 0 0;font-size:14px;color:#c6cbc7}.steps span{font-size:12px;margin-right:10px;color:var(--muted)}.workspace{display:grid;grid-template-columns:1fr 1fr;gap:22px;align-items:start}.panel{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:26px}.section-heading{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:23px}.subtle{font-size:12px;color:var(--muted)}.tabs{display:flex;background:#141718;border-radius:9px;padding:4px;margin-bottom:20px}.tabs button{flex:1;border-radius:6px;padding:9px;color:var(--muted);background:transparent}.tabs button[aria-selected=true]{background:#353b3b;color:white;box-shadow:0 1px 4px #0003}.dropzone{border:1px dashed #666d68;border-radius:10px;text-align:center;padding:27px 15px 20px;background:#1a1d1e}.dropzone.dragging{border-color:var(--gold);background:#302c23}.upload-icon{font-size:28px;line-height:40px;border:1px solid #555b55;border-radius:50%;width:42px;margin:0 auto 14px}.dropzone h3{font-size:18px;margin-bottom:4px}.dropzone p{color:var(--muted);font-size:14px;margin:0 0 18px}.primary{padding:12px 28px;border-radius:8px;color:#1b1b17;background:var(--gold);font-weight:600}.primary:hover:not(:disabled){background:#efd6a5}.dropzone .privacy-note{font-size:12px;margin:16px 0 0}.file-summary{display:flex;gap:12px;align-items:center;justify-content:space-between;margin:17px 0;padding:12px;background:#282d2b;border-radius:8px}.file-summary>div{min-width:0}.file-summary strong{display:block;overflow-wrap:anywhere;font-size:14px}.file-summary span{font-size:12px;color:var(--muted)}.file-summary button{white-space:nowrap;font-size:14px}.error{background:#392427;color:#ffd2cf;border:1px solid #995b5b;border-radius:8px;padding:12px;font-size:14px}#settings{margin-top:25px}.choices{display:flex;gap:12px}.choices label{flex:1;position:relative}.choices input{position:absolute;left:12px;top:16px;accent-color:var(--gold)}.choices label>span{display:block;border:1px solid var(--line);border-radius:8px;padding:12px 12px 12px 37px;font-size:18px}.choices input:checked+span{border-color:#d2c3a6;background:#292c28}.choices input:focus-visible+span{outline:3px solid var(--gold);outline-offset:4px}.choices small{display:block;font-size:12px;color:var(--muted)}.hint{font-size:12px;color:var(--muted);margin:12px 0 0;line-height:1.8}.video-target{border:1px solid var(--line);padding:12px 16px;border-radius:8px}.video-target span{margin-left:16px;font-size:14px;color:var(--muted)}.audio-option{display:block;margin-top:18px}.audio-option input{accent-color:var(--gold);margin-right:8px}.preview-stage{height:255px;display:flex;align-items:center;justify-content:center;background:#131617;border:1px solid #303536;border-radius:10px;overflow:hidden}.preview-stage img,.preview-stage video{width:100%;height:100%;object-fit:contain}.empty-preview{text-align:center;color:var(--muted);padding:20px}.empty-preview>span{font-size:34px;color:#858e87}.empty-preview h3{color:#d3d8d1;margin:9px 0}.empty-preview p{font-size:14px;margin:0}.result-empty{display:flex;align-items:center;gap:16px;border-bottom:1px solid var(--line);padding:22px 0}.outline-icon{font-size:26px;color:#a1aba3}.result-empty h3{margin:0 0 3px}.result-empty p{font-size:12px;color:var(--muted);margin:0}.summary{padding-top:20px}dl{margin:12px 0 22px}dl>div{display:flex;align-items:baseline;justify-content:space-between;gap:18px;margin:10px 0}dt{font-size:14px;color:var(--muted);flex-shrink:0}dd{margin:0;font-size:14px;text-align:right;overflow-wrap:anywhere}dd small{display:block;font-size:12px;color:var(--muted)}.inline-button{font-size:14px;text-align:right;padding:0}.inline-button span{display:block;color:var(--muted);font-size:12px}.start{width:100%}.start:disabled{background:#353a37;color:#a9b0aa;border:1px solid #535a54}.history{margin-top:22px;padding:24px 26px}.history .section-heading{margin-bottom:12px}.history p{font-size:14px;color:var(--muted);margin:0}.storage-note{display:flex;align-items:flex-start;gap:16px;padding:28px 8px;max-width:900px}.storage-note>span{font-size:30px;color:var(--muted)}.storage-note p{font-size:13px;color:var(--muted);margin:0}.storage-note strong{font-size:14px;font-weight:500;color:#d9ded5}.dev-tools{border-top:1px solid #333837;padding:18px 0;color:var(--muted);font-size:13px}.dev-tools summary{cursor:pointer}.dev-tools p{max-width:750px}.secondary{background:#323934;color:var(--text);border:1px solid #555f57;border-radius:7px;padding:9px 15px;font-size:14px}footer{border-top:1px solid #333837;margin-top:25px;padding-top:28px;padding-bottom:36px;display:flex;justify-content:space-between;gap:20px;align-items:center}footer p{font-size:12px;color:var(--muted)}dialog{background:#242928;color:var(--text);border:1px solid #626b61;border-radius:16px;padding:28px;max-width:520px;width:calc(100% - 36px)}dialog::backdrop{background:#000b}dialog p{line-height:1.9;color:#d0d6cd}dialog button{float:right}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap}[hidden]{display:none!important}@media(max-width:760px){.site-header,main,footer{padding-left:20px;padding-right:20px}.site-header{gap:12px;align-items:flex-start}.server-state{max-width:105px;text-align:right;font-size:12px}.brand{font-size:23px}.brand span{font-size:14px}.intro{padding-top:22px}.workspace{grid-template-columns:1fr}.panel{padding:20px}.section-heading{align-items:flex-start}.section-heading .subtle{max-width:105px;text-align:right}.development{font-size:12px}.development>span:last-child{display:block;margin-left:0}.steps li{font-size:12px}.steps span{margin-right:5px}.preview-stage{height:260px}.intro .text-button{font-size:14px}.intro .badge{font-size:11px;margin:0 4px}footer{display:block}.choices small{font-size:11px}.dropzone{padding:24px 12px}.storage-note{padding-left:0;padding-right:0}}

/* Keep explanatory Japanese text readable at every viewport width. */
.hint,.dropzone p,.dropzone .privacy-note,.empty-preview p,.result-empty p,.history p,.storage-note p,.storage-note strong,.dev-tools,.file-summary strong,.file-summary span,dt,dd,.inline-button,.audio-option,.video-target span{font-size:16px}.choices small,.subtle,.badge,dd small,.inline-button span{font-size:14px}.steps li{font-size:16px}@media(max-width:760px){.section-heading .subtle{max-width:none}.section-heading{flex-wrap:wrap}.choices small{font-size:14px}.steps li{font-size:14px}.intro .text-button{font-size:16px}.intro .badge{font-size:12px}}

.local-compare{margin-top:22px}.local-compare>p{color:var(--muted);font-size:16px}.compare-controls{display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin:16px 0}.compare-controls label{display:flex;align-items:center;gap:8px}.compare-controls select{font:inherit;background:#252d29;color:var(--text);border:1px solid #677368;border-radius:5px;padding:6px}.compare-controls input[type=range],.compare-timeline input{accent-color:var(--gold)}.compare-files{display:grid;grid-template-columns:1fr 1fr;gap:18px}.compare-files label{display:flex;flex-direction:column;gap:8px;min-width:0}.compare-files input{max-width:100%;font-size:14px}.compare-files span{overflow-wrap:anywhere;font-size:14px;color:var(--muted)}.compare-viewport{margin-top:18px;border:1px solid var(--line);border-radius:8px;overflow:hidden}#cmp-canvas{display:block;width:100%;height:420px;touch-action:none;cursor:grab}#cmp-canvas:active{cursor:grabbing}.compare-timeline{display:flex;gap:14px;align-items:center}.compare-timeline input{flex:1;min-width:50px}#cmp-clock,#cmp-zoom{font-variant-numeric:tabular-nums;font-size:14px}@media(max-width:760px){.compare-files{grid-template-columns:1fr}#cmp-canvas{height:300px}.compare-controls{gap:10px}.compare-controls label{flex-wrap:wrap}.compare-controls input[type=range]{width:130px}}

@media(max-width:760px){h1{font-size:clamp(22px,6.5vw,28px);text-wrap:balance}.steps span{display:block;margin:0 0 2px}.steps li{padding-top:10px;white-space:nowrap}}

.refine-guidance{border-top:1px solid var(--line);margin-top:22px;padding-top:18px}.refine-guidance p{font-size:16px;color:var(--muted)}#dialog-body{white-space:pre-line}

.profile-options{border:0;margin:0;padding:0;display:grid;grid-template-columns:1fr 1fr;gap:10px}.profile-options legend{font-size:16px;margin-bottom:10px}.profile-options label{display:flex;gap:8px;align-items:flex-start;padding:12px;border:1px solid var(--line);border-radius:8px;min-width:0}.profile-options label:has(input:checked){border-color:#d2c3a6;background:#292c28}.profile-options input{margin-top:5px;accent-color:var(--gold)}.profile-options span{font-size:14px;overflow-wrap:anywhere}.profile-options small{display:block;font-size:12px;color:var(--muted)}@media(max-width:430px){.profile-options{grid-template-columns:1fr}}

.drive-panel{margin-top:22px}.drive-panel p{font-size:16px;color:var(--muted)}.drive-actions{display:grid;grid-template-columns:1fr 1fr;gap:24px;border-top:1px solid var(--line);padding-top:20px}.drive-file-label{display:block;margin:12px 0}.drive-file-label select{display:block;width:100%;font:inherit;background:#252d29;color:var(--text);border:1px solid #677368;border-radius:5px;padding:8px}.drive-panel button:disabled{opacity:.55}@media(max-width:760px){.drive-actions{grid-template-columns:1fr}}

.quality-modes{padding:0;border:0;margin:0 0 12px;display:grid;grid-template-columns:1fr 1fr;gap:16px}.quality-modes legend{font-size:16px;margin-bottom:12px}.quality-modes label{display:flex;gap:12px;align-items:flex-start;padding:18px;border:1px solid var(--line);border-radius:10px;background:var(--panel);cursor:pointer}.quality-modes input{accent-color:var(--gold);margin-top:7px}.quality-modes label:has(input:checked){border-color:var(--gold)}.quality-modes small{display:block;color:var(--muted);font-size:14px}.quality-modes strong{font-size:18px;font-weight:500}#quality-mode-status{margin-bottom:24px}#local-diagnostics{margin-bottom:24px}#local-diagnostics p{color:var(--muted);font-size:16px}.pricing-panel{margin-top:22px}.price-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.price-card{padding:20px;border:1px solid var(--line);border-radius:10px}.price-card h3{font-size:17px}.price-amount{font-size:27px;margin:10px 0}.price-amount small{font-size:14px;color:var(--muted)}.price-card p{font-size:15px;color:var(--muted)}.price-card button{width:100%;font-size:14px}.price-card button:disabled{opacity:.55}.price-status{color:var(--muted);font-size:15px}@media(max-width:760px){.quality-modes,.price-grid{grid-template-columns:1fr}.quality-modes{gap:10px}.quality-modes label{padding:14px}.price-card{padding:16px}}