:root{--bg:#f6f7f9;--side:#fff;--panel:#fff;--panel2:#f4f6f8;--line:#e7e9ed;--text:#20252f;--muted:#78808d;--blue:#3569e8;--cyan:#3569e8;--shadow:0 10px 30px rgba(20,25,40,.03);color-scheme:light}
body:not(.light){--bg:#14171d;--side:#191d24;--panel:#1e232b;--panel2:#262c35;--line:#343b45;--text:#eff1f5;--muted:#9ba4af;--blue:#9ab7ff;--cyan:#9ab7ff;--shadow:none;color-scheme:dark}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans JP",Meiryo,sans-serif;font-size:14px;line-height:1.6}button,input{font:inherit}button{cursor:pointer}button:focus-visible,input:focus-visible,.drop-zone:focus-visible{outline:2px solid var(--blue);outline-offset:2px}.hidden{display:none!important}button:disabled{opacity:.6;cursor:progress}
.app-shell{max-width:1800px;margin:auto;min-height:100vh;display:grid;grid-template-columns:256px minmax(0,1fr)}.sidebar{background:var(--side);border-right:1px solid var(--line);height:100vh;position:sticky;top:0;display:flex;flex-direction:column;padding:26px 14px 18px;z-index:4}.brand{display:flex;align-items:center;gap:10px;padding:4px 12px 27px;font-size:20px;line-height:1.1;font-weight:780;letter-spacing:-.8px}.brand-accent{color:var(--blue)}.brand small{display:block;font-size:10px;letter-spacing:.02em;font-weight:450;color:var(--muted);margin-top:7px}.brand-glyph{height:36px;width:36px;border-radius:11px;background:#eef2ff;color:var(--blue);display:grid;place-items:center;flex:0 0 auto}.brand-glyph svg{height:20px;width:20px}body:not(.light) .brand-glyph{background:#293750}.add-btn{background:var(--text);color:var(--panel);border:0;border-radius:9px;padding:12px 16px;font-weight:650;display:flex;align-items:center;justify-content:center;gap:6px}.add-btn:hover{opacity:.85}.plus{font-size:20px;font-weight:400;line-height:16px}.side-section-title{display:flex;justify-content:space-between;margin:31px 12px 11px;color:var(--muted);font-weight:650;font-size:12px}.count{font-size:12px;background:var(--panel2);border-radius:6px;padding:1px 8px}.file-list{flex:1;min-height:50px;display:flex;flex-direction:column;gap:3px;overflow:auto}.empty-files{font-size:12px;color:var(--muted);padding:3px 12px}.file-row{display:flex;align-items:center;text-align:left;gap:9px;width:100%;min-width:0;border:1px solid transparent;border-radius:8px;padding:10px 8px;color:var(--text);background:transparent}.file-row:hover{background:var(--panel2)}.file-row.active{background:rgba(53,105,232,.085);border-color:rgba(53,105,232,.14)}.file-icon{display:grid;place-items:center;width:29px;height:29px;flex:0 0 auto;color:var(--blue);background:var(--panel2);border-radius:7px;font-size:15px}.file-names{flex:1;min-width:0}.file-names strong{display:block;white-space:nowrap;text-overflow:ellipsis;overflow:hidden;font-size:12px;font-weight:650}.file-names span{display:block;margin-top:1px;color:var(--muted);font-size:10px}.delete-btn{border:0;background:transparent;color:var(--muted);font-size:20px;padding:0 4px}.delete-btn:hover{color:#c1434a}.side-bottom{border-top:1px solid var(--line);font-size:11px;color:var(--muted);padding:16px 12px 0}.side-bottom p{margin:3px 0 0;font-size:10px}.status-dot,.pulse-dot{display:inline-block;background:#2ca76e;border-radius:50%;width:7px;height:7px;margin-right:7px}
.main{position:relative;min-width:0;padding:0 38px 110px}.topbar{height:80px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);gap:20px}.eyebrow{font-size:12px;font-weight:600;color:var(--muted);letter-spacing:0}.top-actions{display:flex;align-items:center;gap:16px}.privacy{display:flex;align-items:center;gap:7px;color:var(--muted);font-size:12px}.icon-btn{background:transparent;color:var(--muted);border:1px solid var(--line);width:33px;height:33px;border-radius:8px;font-size:18px}.main>footer{font-size:11px;color:var(--muted);margin-top:30px;text-align:center}
.welcome{max-width:860px;margin:68px auto 0;text-align:center}.hero-pill{font-size:12px;font-weight:650;color:var(--blue);margin-bottom:16px}.pulse-dot{background:var(--blue)}.welcome h1{font-size:clamp(32px,4vw,50px);line-height:1.3;letter-spacing:-.045em;font-weight:730;margin:0}.welcome h1 span{color:var(--blue)}.hero-description{line-height:1.9;color:var(--muted);max-width:550px;margin:20px auto 38px}.drop-zone{background:var(--panel);border:1.5px dashed #b9c4d5;border-radius:13px;padding:36px 24px 32px;display:flex;align-items:center;flex-direction:column;gap:8px;cursor:pointer;transition:.2s}.drop-zone:hover,.drop-zone.dragover{border-color:var(--blue);background:var(--panel2)}.upload-illustration{width:54px;height:54px;color:var(--blue);display:grid;place-items:center;margin-bottom:4px}.upload-illustration svg{width:45px}.drop-zone strong{font-size:17px;font-weight:650}.drop-zone>span,.drop-zone small{font-size:12px;color:var(--muted)}.select-btn,.primary-btn{border:0;background:var(--blue);color:#fff;border-radius:8px;padding:10px 16px;font-weight:650}.select-btn{margin:10px 0 7px}.select-btn span{display:none}.feature-row{display:flex;justify-content:center;gap:28px;margin:29px 0 0}.feature-row>div{display:flex;align-items:center;gap:7px;font-size:11px;color:var(--muted)}.feature-row strong{font-size:11px;font-weight:550;color:var(--muted)}.feature-row .feature-symbol{color:var(--blue);font-size:17px}.feature-row>div>span:last-child{display:none}
.results{padding-top:32px;max-width:1320px;margin:0 auto}.title-bar{display:flex;justify-content:space-between;align-items:center;gap:15px;margin-bottom:24px}.title-bar h1{font-size:26px;letter-spacing:-.035em;font-weight:700;margin:4px 0}.title-bar p{font-size:12px;color:var(--muted);margin:4px 0 0}.tiny-tag{font-size:10px;background:var(--panel2);color:var(--muted);padding:4px 7px;border-radius:5px;margin-left:8px}.report-actions{display:flex;gap:7px}.ghost-btn{border:1px solid var(--line);background:var(--panel);color:var(--text);border-radius:8px;padding:9px 14px;font-weight:550}.ghost-btn:hover{border-color:var(--blue)}.track-banner{border:1px solid var(--line);background:var(--panel);border-radius:12px;padding:21px;display:flex;align-items:center;gap:20px;min-width:0}.cover{width:105px;height:105px;flex:0 0 105px;border-radius:9px;overflow:hidden;background:var(--panel2);display:grid;place-items:center}.cover img{width:100%;height:100%;object-fit:cover}.placeholder-cover{height:100%;width:100%;display:grid;place-items:center;color:var(--muted)}.placeholder-cover svg{width:40px;height:40px}.track-info{flex:1;min-width:0}.track-kicker{font-size:10px;color:var(--muted);font-weight:700;letter-spacing:.08em}.track-info h2{font-size:24px;line-height:1.3;margin:7px 0;word-break:break-word;letter-spacing:-.025em}.track-info>p{color:var(--muted);font-size:13px;margin:0}.chips{display:flex;gap:6px;flex-wrap:wrap;margin-top:13px}.chip,.quality-pill{border:1px solid var(--line);background:var(--panel2);color:var(--muted);border-radius:6px;padding:3px 8px;font-size:10px}.banner-side{text-align:right;min-width:100px}.quality-pill{background:#edf4ff;color:#3569e8;border:0;font-weight:720}body:not(.light) .quality-pill{background:#283d5d;color:#a4c2ff}.file-size-display{font-size:18px;font-weight:700;margin-top:9px}.banner-side small{color:var(--muted);font-size:10px}
.metrics-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px;margin:15px 0 26px}.metric{min-width:0;padding:17px;background:var(--panel);border:1px solid var(--line);border-radius:10px}.metric-top{display:flex;gap:6px;align-items:center;color:var(--muted);font-size:11px;font-weight:600}.metric-icon{font-size:14px;color:var(--blue)}.metric-value{font-size:21px;font-weight:700;letter-spacing:-.03em;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;margin:10px 0 1px}.metric-detail{font-size:10px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.tabs{display:flex;gap:18px;border-bottom:1px solid var(--line);overflow:auto;white-space:nowrap;margin:0 0 20px}.tab{background:transparent;border:0;border-bottom:2px solid transparent;padding:0 0 13px;color:var(--muted);font-size:13px;font-weight:600}.tab.active{color:var(--blue);border-bottom-color:var(--blue)}.tab span{font-size:10px;margin-left:3px;color:var(--muted)}.tab-panel{padding-bottom:20px}.info-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.info-card,.raw-track,.chart-box{background:var(--panel);border:1px solid var(--line);border-radius:10px}.info-card{padding:17px 21px}.info-card h3{font-size:14px;margin:0 0 12px;font-weight:700}.section-symbol{font-size:14px;color:var(--blue);margin-right:8px}.keyrow{display:flex;align-items:flex-start;gap:18px;justify-content:space-between;padding:9px 0;border-top:1px solid var(--line);font-size:12px}.keyrow .key{color:var(--muted);flex:0 0 39%;min-width:0;overflow-wrap:anywhere}.keyrow .value{min-width:0;flex:1;text-align:right;overflow-wrap:anywhere;white-space:pre-wrap}.explainer{display:flex;align-items:flex-start;gap:12px;padding:17px 20px;color:var(--muted);margin-top:14px;background:var(--panel2);border-radius:10px;font-size:12px}.explainer strong{color:var(--text);font-size:12px}.explainer p{margin:4px 0}.explainer-icon{font-size:18px;color:var(--blue)}.details-toolbar{display:flex;align-items:center;justify-content:space-between;gap:15px;margin:10px 0 18px}.details-toolbar h3,.visual-intro h3{margin:0;font-size:16px}.details-toolbar p,.visual-intro p{font-size:12px;color:var(--muted);margin:4px 0 0}.search-wrap{position:relative}.search-wrap span{position:absolute;top:8px;left:10px;color:var(--muted)}.search-wrap input{border:1px solid var(--line);border-radius:8px;background:var(--panel);color:var(--text);padding:10px 12px 10px 30px;width:240px;max-width:100%}.raw-track{margin:9px 0;overflow:hidden}.raw-track summary{list-style:none;cursor:pointer;padding:13px 18px;font-weight:650;display:flex;align-items:center;justify-content:space-between}.raw-track summary::-webkit-details-marker{display:none}.raw-track summary span:last-child{color:var(--muted);font-size:11px;font-weight:500}.raw-table{padding:2px 18px 12px}.raw-empty{color:var(--muted)}.comparison-scroll{overflow:auto;border:1px solid var(--line);border-radius:9px;background:var(--panel)}table{width:100%;border-collapse:collapse;font-size:12px}th,td{padding:12px 15px;text-align:left;white-space:nowrap;border-bottom:1px solid var(--line)}th{font-weight:650;color:var(--muted);background:var(--panel2)}tr:last-child td{border:0}
.visual-intro{display:flex;align-items:center;justify-content:space-between;gap:15px;padding:16px 20px;background:var(--panel);border:1px solid var(--line);border-radius:10px}.hint{font-size:12px;line-height:1.8;color:var(--muted);padding:12px 3px}.channel-selector{display:flex;flex-wrap:wrap;gap:7px;margin:7px 0 15px}.channel-selector:empty,.channel-charts:empty{display:none}.channel-filter{padding:7px 11px;background:var(--panel);border:1px solid var(--line);border-radius:7px;color:var(--muted);font-size:12px}.channel-filter.selected{border-color:var(--blue);background:rgba(53,105,232,.07);color:var(--blue)}.channel-panel{background:var(--panel);border:1px solid var(--line);border-radius:10px;margin:0 0 12px;padding:18px}.channel-panel-head{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px;margin-bottom:15px}.channel-panel-name{font-size:14px}.channel-panel-hint{font-size:11px;color:var(--muted)}.channel-panel-charts{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.chart-box{padding:12px;min-width:0;background:var(--panel2)}.chart-box h4,.chart-box strong{font-size:11px;color:var(--muted);font-weight:650}.chart-box canvas{width:100%;display:block}.signal-stats{display:flex;flex-wrap:wrap;gap:8px;margin-top:10px}.signal-stats>span{padding:7px 10px;border:1px solid var(--line);border-radius:7px;background:var(--panel);font-size:11px;color:var(--muted)}.signal-stats strong{margin-left:4px;color:var(--text)}
.playback{position:fixed;bottom:0;right:0;left:256px;z-index:6;border-top:1px solid var(--line);background:var(--panel);padding:13px max(28px,calc((100vw - 256px - 1260px)/2));display:flex;align-items:center;gap:14px;box-shadow:0 -7px 25px rgba(30,40,70,.035)}.play-btn{width:40px;height:40px;border-radius:50%;background:var(--blue);color:#fff;border:0;flex:0 0 40px}.playback-name{display:flex;flex-direction:column;gap:0;min-width:0;width:250px}.playback-name strong{font-size:12px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.playback-name span{color:var(--muted);font-size:10px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.time{color:var(--muted);font-size:12px;font-variant-numeric:tabular-nums}.seek{flex:1;accent-color:var(--blue);min-width:80px}.playback audio{display:none}.toast{position:fixed;top:16px;right:20px;z-index:99;max-width:400px;padding:13px 20px;background:var(--text);color:var(--panel);border-radius:9px;opacity:0;transform:translateY(-15px);pointer-events:none;transition:.2s;font-size:12px}.toast.show{opacity:1;transform:translateY(0)}
@media(max-width:1040px){.app-shell{grid-template-columns:214px minmax(0,1fr)}.main{padding:0 24px 100px}.playback{left:214px}.metrics-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.playback-name{width:160px}}
@media(max-width:700px){.app-shell{display:block}.sidebar{position:relative;height:auto;padding:15px 14px;border-right:0;border-bottom:1px solid var(--line)}.brand{padding:4px 0 12px}.side-section-title{margin:14px 2px 4px}.side-bottom{display:none}.file-list{max-height:120px;flex-direction:row;overflow-x:auto;overflow-y:hidden}.file-row{min-width:150px;max-width:190px}.add-btn{padding:9px 12px}.main{padding:0 15px 130px}.topbar{height:55px}.topbar .eyebrow{display:none}.topbar{justify-content:flex-end}.welcome{margin:35px auto 0}.hero-description{margin:16px auto 25px}.drop-zone{padding:25px 12px}.feature-row{gap:12px;flex-wrap:wrap}.results{padding-top:18px}.title-bar{align-items:flex-start}.title-bar h1{font-size:22px}.track-banner{padding:13px;gap:13px}.cover{height:70px;width:70px;flex-basis:70px}.track-info h2{font-size:17px}.banner-side{display:none}.metrics-grid{gap:7px;margin-bottom:20px}.metric{padding:12px}.metric-value{font-size:17px}.info-grid,.channel-panel-charts{grid-template-columns:1fr}.info-card{padding:13px 14px}.details-toolbar{align-items:stretch;flex-direction:column}.search-wrap input{width:100%}.visual-intro{align-items:stretch;flex-direction:column}.playback{left:0;gap:9px;padding:12px}.playback-name{width:25vw}.playback-name span{display:none}.play-btn{width:36px;height:36px;flex-basis:36px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto;transition:none!important}}

/* v2 / minimal & calm */
:root {color-scheme:light}
body{font-family:system-ui,-apple-system,'Segoe UI',sans-serif}
.brand-glyph,.hero-pill,.feature-row,.track-kicker,.eyebrow,.metric-icon,.section-symbol,.explainer-icon,.pulse-dot{display:none!important}
.brand{font-size:19px;letter-spacing:-.035em;padding-top:12px}
.topbar{border-bottom:0;height:62px}
.sidebar{background:var(--panel)}
.results{padding-top:16px}
.title-bar{margin-bottom:14px}.title-bar h1{font-size:22px}
.welcome{margin-top:clamp(30px,9vh,120px)}
.welcome h1{font-size:clamp(29px,4vw,40px);letter-spacing:-.04em}
.hero-description{max-width:420px;font-size:14px}
.drop-zone{border-style:solid;box-shadow:none!important}
.track-banner,.metric,.info-card,.raw-track,.quality-figure,.quality-bands,.quality-summary{border-radius:8px}
.track-banner{padding:16px}.cover{width:80px;height:80px;flex-basis:80px}
.track-info h2{font-size:20px}
.metric{padding:14px}.metric-value{font-size:19px}.metrics-grid{margin:12px 0 22px;gap:8px}
.tabs{gap:24px}.tab{font-weight:600}
.explainer{background:transparent;padding:12px 2px}
.playback{box-shadow:none}
#playerStatus{display:none}
.sr-only{position:absolute!important;width:1px!important;height:1px!important;padding:0!important;margin:-1px!important;overflow:hidden!important;clip:rect(0,0,0,0)!important;white-space:nowrap!important;border:0!important}
.quality-toolbar{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-bottom:15px}
.quality-toolbar h3{font-size:17px;margin:0 0 5px}
.quality-toolbar p{font-size:12px;color:var(--muted);margin:0;line-height:1.7}
.quality-summary,.quality-figure,.quality-bands{border:1px solid var(--line);background:var(--panel)}
.quality-summary{padding:18px 20px;display:flex;align-items:center;justify-content:space-between;gap:14px;margin-bottom:13px}
.quality-eyebrow{font-size:11px;color:var(--muted);margin-bottom:5px}
.quality-summary strong{font-size:22px;letter-spacing:-.025em}
.quality-summary p{font-size:12px;color:var(--muted);margin:6px 0 0;line-height:1.7;max-width:600px}
.quality-metrics{display:flex;gap:18px;flex-shrink:0}
.quality-metric{display:flex;flex-direction:column;gap:5px}
.quality-metric span{font-size:11px;color:var(--muted)}
.quality-metric strong{font-size:18px;font-variant-numeric:tabular-nums}
.quality-chart-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.quality-figure{padding:14px;min-width:0}.quality-figure h4,.quality-bands h4{font-size:13px;margin:0 0 12px}
.quality-figure canvas{width:100%;display:block}.quality-figure small{font-size:10px;color:var(--muted);line-height:1.6}
.quality-bands{margin-top:12px;padding:16px}.quality-band{display:grid;grid-template-columns:105px minmax(0,1fr) 65px;align-items:center;gap:12px;font-size:12px;padding:6px 0}
.quality-band-label{white-space:nowrap;color:var(--muted)}.quality-band-track{height:8px;background:var(--panel2);border-radius:8px;overflow:hidden}
.quality-band-fill{height:100%;background:var(--blue);border-radius:8px}.quality-band-value{text-align:right;font-variant-numeric:tabular-nums}
.quality-method,.quality-disclaimer{font-size:11px;line-height:1.8;color:var(--muted);margin:12px 1px}
.quality-disclaimer{padding:10px 13px;border-left:2px solid var(--line)}
.quality-error{padding:12px 14px;border:1px solid var(--line);border-radius:8px;font-size:12px;color:var(--text)}
.mini-loading{padding:12px;display:flex;align-items:center;justify-content:center;min-height:56px}
.spinner{display:inline-block;width:18px;height:18px;border:2px solid var(--line);border-top-color:var(--blue);border-radius:50%;animation:spin .7s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
button[aria-busy="true"]{opacity:.66;cursor:wait}
@media(max-width:800px){.quality-chart-grid{grid-template-columns:1fr}.quality-summary{align-items:stretch;flex-direction:column}.quality-metrics{justify-content:flex-start}.quality-toolbar{align-items:flex-start;flex-direction:column}}
@media(max-width:700px){.brand{padding:4px 0 10px}.welcome{margin:30px auto}.quality-band{grid-template-columns:80px minmax(0,1fr) 58px;gap:7px;font-size:10px}.quality-summary{padding:15px}}

@media(max-width:700px){.topbar{height:44px}.welcome{margin-top:23px}.drop-zone{border-radius:8px}}