:root {
  --paper: #070a10;
  --surface: #101722;
  --surface-raised: #151e2b;
  --surface-soft: #0d131d;
  --ink: #f3f7fb;
  --muted: #8d9aac;
  --line: #202b3b;
  --line-strong: #344359;
  --accent: #62e6c7;
  --accent-strong: #90f2dc;
  --accent-soft: #1b3d3a;
  --note: #5f82ff;
  --note-active: #70f0d1;
  --sage: #62e6c7;
  --wash: #0d131d;
  --danger: #ff7b86;
  --workspace-grid: #263244;
  --row-height: 22px;
  --serif: Georgia, "Songti SC", STSong, serif;
  --sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Helvetica Neue", sans-serif;
  color-scheme: dark;
  font-family: var(--sans);
  color: var(--ink);
  background: var(--paper);
}

*, *::before, *::after { box-sizing: border-box; }
html { min-width: 320px; min-height: 100%; scroll-behavior: smooth; }
body { min-width: 320px; min-height: 100vh; margin: 0; background: var(--paper); color: var(--ink); line-height: 1.55; }
button, input, select, a { font: inherit; }
button, a { color: inherit; }
button { cursor: pointer; }
svg { display: block; }
[hidden] { display: none !important; }
.visually-hidden { position: absolute !important; width: 1px !important; height: 1px !important; margin: -1px !important; overflow: hidden !important; clip: rect(0 0 0 0) !important; white-space: nowrap !important; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
.skip-link { position: fixed; z-index: 100; top: 8px; left: 8px; padding: 8px 12px; transform: translateY(-150%); background: var(--surface-raised); color: var(--accent); }
.skip-link:focus { transform: translateY(0); }

.masthead { display: flex; min-height: 78px; align-items: center; justify-content: space-between; gap: 24px; margin: 0 clamp(22px,5vw,72px); border-bottom: 1px solid var(--line); }
.brand { min-height: 44px; display: inline-flex; align-items: center; color: var(--ink); font: 750 21px/1 var(--sans); letter-spacing: .045em; text-decoration: none; }
.local-badge { display: flex; align-items: center; gap: 8px; color: var(--muted); font-size: 13px; }
.local-badge svg { width: 18px; fill: none; stroke: var(--sage); stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.local-badge-result { display: none; }
.text-button { min-height: 44px; padding: 0; border: 0; background: transparent; color: var(--accent); font-weight: 650; }

main { width: min(1440px, 90vw); margin: 0 auto 72px; }
.eyebrow { margin: 0 0 12px; color: var(--accent); font-size: 12px; font-weight: 750; letter-spacing: .13em; text-transform: uppercase; }
h1, h2, p { margin-top: 0; }

.upload-view { display: grid; grid-template-columns: minmax(0, .94fr) minmax(420px, 1.06fr); gap: clamp(48px,7vw,110px); align-items: center; min-height: calc(100vh - 150px); padding: 52px 0 42px; }
.upload-copy h1 { margin-bottom: 24px; font: 500 clamp(48px,5.4vw,78px)/1.08 var(--serif); letter-spacing: -.045em; }
.hero-description { max-width: 650px; color: var(--muted); font-size: 17px; line-height: 1.75; }
.feature-list { list-style: none; margin: 42px 0 0; padding: 0; border-top: 1px solid var(--line); }
.feature-list li { display: grid; grid-template-columns: 48px 1fr; gap: 14px; padding: 18px 0; border-bottom: 1px solid var(--line); }
.feature-list li > span { color: var(--accent); font: 700 15px var(--sans); }
.feature-list strong { font-size: 15px; }
.feature-list p { margin: 4px 0 0; color: var(--muted); font-size: 13px; }

.upload-panel { padding: clamp(24px,3vw,40px); border: 1px solid var(--line); border-radius: 10px; background: var(--surface); box-shadow: 0 24px 64px rgba(0,0,0,.28); }
.drop-zone { min-height: 310px; display: flex; flex-direction: column; align-items: center; justify-content: center; padding: 30px; border: 1px dashed var(--line-strong); background: var(--surface-soft); text-align: center; transition: border-color .15s, background .15s; }
.drop-zone.is-dragging { border-color: var(--accent); background: var(--accent-soft); }
.upload-mark { width: 58px; fill: none; stroke: var(--accent); stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.drop-zone h2 { margin: 18px 0 3px; font: 500 26px var(--serif); }
.drop-zone > p { margin-bottom: 16px; color: var(--muted); }
.file-picker { min-height: 44px; display: inline-flex; align-items: center; padding: 0 20px; border-radius: 5px; background: var(--accent); color: var(--paper); font-weight: 750; cursor: pointer; }
.field-help, .selected-file { margin: 12px 0 0 !important; font-size: 12px; }
.selected-file { color: var(--ink) !important; overflow-wrap: anywhere; }
.metadata-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 22px; }
.metadata-grid label { color: var(--muted); font-size: 12px; font-weight: 650; }
.metadata-grid input { width: 100%; height: 48px; margin-top: 7px; padding: 0 13px; border: 1px solid var(--line); border-radius: 4px; background: transparent; color: var(--ink); }
.metadata-grid small { display: block; margin-top: 5px; font-weight: 400; }
.primary-button { width: 100%; min-height: 52px; display: flex; align-items: center; justify-content: center; gap: 10px; margin-top: 20px; border: 0; border-radius: 5px; background: var(--accent); color: var(--paper); font-weight: 750; }
.primary-button:hover { background: var(--accent-strong); }
.primary-button:disabled { cursor: wait; opacity: .65; }
.primary-button svg { width: 18px; fill: none; stroke: currentColor; stroke-width: 2; }
.privacy-note { display: flex; justify-content: center; align-items: center; gap: 8px; margin: 15px 0 0; color: var(--muted); font-size: 11px; }
.privacy-note span { width: 7px; height: 7px; border-radius: 50%; background: var(--sage); }
.error-summary { margin-bottom: 18px; padding: 12px 14px; border-left: 3px solid var(--danger); background: #29131a; color: var(--danger); font-size: 13px; }

.processing-view { padding: 74px 0; }
.processing-header h1 { margin: 0; font: 500 clamp(48px,5vw,70px)/1.1 var(--serif); }
.processing-header > p:last-child { margin-top: 14px; color: var(--muted); }
.processing-layout { display: grid; grid-template-columns: minmax(280px,.7fr) minmax(0,1.3fr); gap: 70px; margin-top: 56px; border-top: 1px solid var(--line); }
.processing-steps { list-style: none; margin: 0; padding: 0; }
.processing-steps li { display: grid; grid-template-columns: 44px 1fr; gap: 15px; padding: 22px 0; border-bottom: 1px solid var(--line); opacity: .4; }
.processing-steps li.is-current, .processing-steps li.is-complete { opacity: 1; }
.processing-steps li.is-current > span { color: var(--accent); }
.processing-steps li.is-complete > span { color: var(--sage); }
.processing-steps strong, .processing-steps small { display: block; }
.processing-steps small { margin-top: 3px; color: var(--muted); }
.processing-status { padding-top: 58px; }
.processing-status > p:first-child { margin-bottom: 6px; color: var(--accent); font-weight: 700; }
.processing-status > strong { display: block; margin-bottom: 15px; font: 500 46px var(--serif); }
.processing-status progress { width: 100%; height: 5px; border: 0; appearance: none; }
.processing-status progress::-webkit-progress-bar { background: var(--line); }
.processing-status progress::-webkit-progress-value { background: var(--accent); transition: width .2s linear; }
.processing-status > p:nth-last-of-type(1) { margin-top: 20px; color: var(--muted); }
.scan-visual { position: relative; height: 210px; margin-top: 34px; overflow: hidden; border-block: 1px solid var(--line); background: var(--surface-soft); }
.scan-visual span { position: absolute; inset: 0 auto 0 42%; width: 2px; background: var(--accent); }
.scan-visual i { position: absolute; height: 10px; border-radius: 3px; background: var(--note); }
.scan-visual i:nth-of-type(1){left:8%;top:55%;width:12%}.scan-visual i:nth-of-type(2){left:22%;top:42%;width:17%}.scan-visual i:nth-of-type(3){left:43%;top:65%;width:10%}.scan-visual i:nth-of-type(4){left:57%;top:34%;width:15%}.scan-visual i:nth-of-type(5){left:76%;top:48%;width:9%}.scan-visual i:nth-of-type(6){left:87%;top:28%;width:11%;opacity:.3}

.result-view { padding: 20px 0 48px; }
.result-header { display: flex; align-items: center; justify-content: space-between; gap: 40px; min-height: 104px; padding: 8px 8px 14px; }
.song-identity { min-width: 0; display: flex; align-items: center; gap: 20px; }
.song-mark { width: 68px; height: 68px; flex: 0 0 68px; display: grid; place-items: center; border: 1px solid var(--line-strong); border-radius: 9px; background: var(--surface-raised); color: var(--accent); box-shadow: inset 3px 0 0 var(--accent); }
.song-mark img { width: 34px; height: 34px; filter: invert(88%) sepia(28%) saturate(662%) hue-rotate(105deg) brightness(98%); }
.result-header h1 { margin: 0; overflow-wrap: anywhere; font: 720 clamp(23px,2.1vw,29px)/1.08 var(--sans); letter-spacing: -.02em; }
.result-header h1:focus { outline: none; }
.result-header .eyebrow { display: none; }
.result-header > div:first-child p:last-child { margin: 8px 0 0; color: var(--muted); font-size: 13px; }
.result-controls { min-width: 230px; }
.result-controls label { display: flex; align-items: center; justify-content: space-between; gap: 12px; color: var(--muted); font-size: 12px; }
.result-controls select { min-width: 150px; height: 44px; padding: 0 10px; border: 1px solid var(--line-strong); border-radius: 5px; background: var(--surface-raised); color: var(--ink); }
.result-controls p { margin: 7px 0 0; color: var(--muted); font-size: 10px; text-align: right; }
.transport { position: relative; z-index: 12; display: block; border: 1px solid var(--line-strong); border-radius: 10px 10px 0 0; background: rgba(16,23,34,.94); box-shadow: 0 16px 44px rgba(0,0,0,.24); backdrop-filter: blur(16px); }
.transport::before { content: ""; position: absolute; inset: 0 auto auto 0; width: 128px; height: 2px; background: var(--accent); }
.transport-main { display: grid; grid-template-columns: auto auto minmax(180px,1fr) auto; gap: 14px; align-items: center; min-height: 66px; padding: 10px 16px; }
.transport-utility { min-height: 48px; display: flex; align-items: center; gap: 18px; padding: 6px 16px; border-top: 1px solid var(--line); color: var(--ink); }
.utility-label { color: #6f7d91; font-size: 9px; font-weight: 800; letter-spacing: .11em; text-transform: uppercase; }
.segment-controls, .source-controls { display: flex; align-items: center; gap: 6px; }
.segment-controls button, .quiet-button, .source-controls button { min-height: 32px; padding: 0 10px; border: 1px solid var(--line); border-radius: 5px; background: var(--surface-raised); color: var(--muted); font: 700 10px var(--sans); }
.segment-controls button:hover, .segment-controls button[aria-pressed="true"], .quiet-button:hover, .quiet-button.is-active { border-color: var(--accent); background: var(--accent-soft); color: var(--accent-strong); }
.segment-controls output { margin-left: 5px; color: var(--muted); font: 650 9px var(--sans); font-variant-numeric: tabular-nums; }
.segment-dash { color: #566276; font-size: 10px; }
.segment-controls .text-button { min-width: 38px; padding: 0 4px; background: transparent; color: var(--muted); }
.source-controls { margin-left: auto; padding-left: 18px; border-left: 1px solid var(--line); }
.transport-play, .mode-button { min-height: 42px; border-radius: 5px; }
.transport-play { display: flex; align-items: center; gap: 7px; padding: 0 18px; border: 0; background: var(--accent); color: var(--paper); font-weight: 800; box-shadow: 0 7px 20px rgba(98,230,199,.13); }
.transport-play:hover { background: var(--accent-strong); }
.transport-play svg { width: 15px; fill: currentColor; }
.mode-button { padding: 0 12px; border: 1px solid var(--line); background: transparent; color: var(--muted); }
.mode-button.is-active { border-color: var(--accent); background: var(--accent-soft); color: var(--accent-strong); }
.time-display { display: flex; gap: 6px; color: var(--muted); font-size: 12px; font-variant-numeric: tabular-nums; }
.time-display span:first-child { color: var(--accent); font-weight: 750; }
.time-display i { font-style: normal; color: #59667a; }
#transport-scrubber { width: 100%; min-width: 0; accent-color: var(--accent); }
.export-menu { position: relative; margin-left: 0; }
.export-menu summary { min-height: 32px; display: flex; align-items: center; gap: 8px; padding: 0 12px; border: 1px solid var(--line); border-radius: 5px; background: var(--surface-raised); color: var(--ink); font-size: 10px; font-weight: 750; list-style: none; cursor: pointer; }
.export-menu summary::-webkit-details-marker { display: none; }
.export-menu summary::after { content: "⌄"; color: var(--accent); }
.export-menu[open] summary { border-color: var(--accent); }
.export-popover { position: absolute; z-index: 30; top: calc(100% + 8px); right: 0; min-width: 156px; overflow: hidden; padding: 5px; border: 1px solid var(--line-strong); border-radius: 7px; background: rgba(21,30,43,.98); box-shadow: 0 18px 38px rgba(0,0,0,.34); backdrop-filter: blur(16px); }
.export-popover a { min-height: 38px; display: flex; align-items: center; padding: 0 10px; border-radius: 4px; color: var(--ink); font-size: 11px; font-weight: 650; text-decoration: none; white-space: nowrap; }
.export-popover a:hover { background: var(--accent-soft); color: var(--accent-strong); }

.workspace { margin-top: 0; border: 1px solid var(--line-strong); border-top: 0; border-radius: 0 0 10px 10px; overflow: hidden; background: var(--surface); box-shadow: 0 26px 64px rgba(0,0,0,.26); }
.workspace-heading { min-height: 48px; display: flex; align-items: center; justify-content: space-between; gap: 18px; padding: 0 18px; border-bottom: 1px solid var(--line); }
.workspace-heading span, .workspace-heading small { display: block; }
.workspace-heading span { font: 750 15px var(--sans); letter-spacing: -.01em; }
.workspace-heading small { margin-top: 2px; color: var(--muted); font-size: 10px; }
.workspace-identity { display: flex; align-items: center; gap: 16px; }
.workspace-identity > span, .workspace-identity > small { display: none; }
.view-switch { display: inline-flex; padding: 3px; border: 1px solid var(--line-strong); border-radius: 6px; background: var(--surface-soft); }
.view-switch button { min-height: 34px; padding: 0 13px; border: 0; border-radius: 3px; background: transparent; color: var(--muted); font: 700 11px var(--sans); }
.view-switch button[aria-selected="true"] { background: var(--accent); color: var(--paper); box-shadow: 0 5px 15px rgba(98,230,199,.12); }
.now-card { min-width: 160px; padding-left: 14px; border-left: 2px solid var(--accent); }
.now-card span, .now-card small { color: var(--muted); font: 11px var(--sans); }
.now-card strong { display: block; font: 720 20px var(--sans); }
.note-editor { min-width: 300px; display: flex; align-items: center; justify-content: center; padding: 4px 12px; border-inline: 1px solid var(--line); }
.note-editor > p { margin: 0; color: var(--muted); font-size: 12px; }
.note-editor-selection { width: 100%; display: grid; grid-template-columns: auto auto 1fr auto; align-items: center; gap: 8px; }
.note-editor-selection > span { color: var(--accent); font-size: 11px; font-weight: 750; letter-spacing: .04em; }
.note-editor-selection > strong { font: 700 20px var(--sans); }
.note-editor-selection > small { color: var(--muted); font-size: 11px; }
.note-editor-selection > button { min-height: 34px; padding: 0 12px; border: 1px solid #58363f; border-radius: 4px; background: #25151b; color: var(--danger); font-size: 12px; font-weight: 700; }
.note-editor-selection > button:hover { border-color: var(--danger); background: #321920; }
.practice-tools { border-bottom: 1px solid var(--line); background: var(--surface-soft); }
.practice-tools > summary { min-height: 46px; display: flex; align-items: center; gap: 11px; padding: 0 18px; color: var(--ink); list-style: none; cursor: pointer; }
.practice-tools > summary::-webkit-details-marker { display: none; }
.practice-tools > summary::before { content: ""; width: 7px; height: 7px; border: 1px solid var(--accent); border-radius: 50%; box-shadow: 0 0 0 4px rgba(98,230,199,.08); }
.practice-tools > summary::after { content: "+"; margin-left: auto; color: var(--accent); font-size: 17px; font-weight: 500; }
.practice-tools[open] > summary::after { content: "−"; }
.practice-tools > summary span { font-size: 12px; font-weight: 750; }
.practice-tools > summary small { color: var(--muted); font-size: 10px; }
.microphone-panel { min-height: 72px; display: grid; grid-template-columns: minmax(230px,.9fr) auto minmax(230px,.75fr) minmax(170px,1.3fr) minmax(210px,.9fr); align-items: center; gap: 18px; padding: 10px 18px; border-top: 1px solid var(--line); background: var(--surface-raised); }
.microphone-intro { min-width: 0; display: flex; align-items: center; gap: 11px; }
.microphone-dot { width: 10px; height: 10px; flex: 0 0 auto; border: 2px solid var(--muted); border-radius: 50%; }
.microphone-panel.is-listening .microphone-dot { border-color: var(--accent); background: var(--accent); box-shadow: 0 0 0 5px rgba(98,230,199,.1); }
.microphone-intro h2 { margin: 0; font: 700 16px var(--sans); }
.microphone-intro p { margin: 2px 0 0; color: var(--muted); font-size: 10px; }
.microphone-toggle { min-height: 40px; padding: 0 15px; border: 1px solid var(--accent); border-radius: 5px; background: transparent; color: var(--accent-strong); font-size: 12px; font-weight: 700; }
.microphone-toggle[aria-pressed="true"] { background: var(--accent); color: var(--paper); }
.microphone-reading { display: grid; grid-template-columns: auto auto; align-items: baseline; column-gap: 8px; }
.microphone-reading > span { grid-column: 1 / -1; color: var(--muted); font-size: 10px; }
.microphone-reading strong { font: 720 23px var(--sans); }
.microphone-reading small { color: var(--muted); font-size: 10px; font-variant-numeric: tabular-nums; }
.tuning-meter { position: relative; height: 24px; }
.tuning-meter::before { content: "低"; position: absolute; left: 0; top: 4px; color: var(--muted); font-size: 9px; }
.tuning-meter::after { content: "高"; position: absolute; right: 0; top: 4px; color: var(--muted); font-size: 9px; }
.tuning-meter i { position: absolute; left: 20px; right: 20px; top: 12px; height: 1px; background: var(--line-strong); }
.tuning-meter span { position: absolute; z-index: 2; left: 50%; top: 5px; width: 4px; height: 15px; border-radius: 2px; background: var(--accent); opacity: .35; transform: translateX(-50%); transition: left .08s linear, background .08s, opacity .08s; }
.microphone-panel.has-pitch .tuning-meter span { opacity: 1; }
.microphone-panel.is-in-tune .tuning-meter span { background: #2e8b62; }
.microphone-comparison span, .microphone-comparison strong { display: block; }
.microphone-comparison span { color: var(--muted); font-size: 10px; }
.microphone-comparison strong { margin-top: 2px; font-size: 12px; }
.microphone-panel.is-match .microphone-comparison strong { color: #23724f; }
.roll-ruler { height: 36px; margin-left: 102px; display: grid; grid-template-columns: repeat(5,1fr); align-items: center; color: #738096; font-size: 10px; text-align: center; border-bottom: 1px solid var(--line-strong); background: #0b111a; }
.roll-ruler b { color: var(--accent); }
.roll-viewport { display: grid; grid-template-columns: 102px 1fr; height: 407px; align-items: start; overflow-x: hidden; overflow-y: auto; scrollbar-color: #344359 transparent; scrollbar-width: thin; }
.keyboard { position: relative; z-index: 4; height: 814px; border-right: 1px solid #44536a; background: #dbe2ec; }
.piano-key { position: absolute; left: 0; width: 100%; height: var(--row-height); border-bottom: 1px solid #aab4c2; }
.piano-key.black::after { content:""; position:absolute; top:2px; left:0; width:64%; height:17px; border-radius: 0 2px 2px 0; background:#151c27; box-shadow: inset -1px 0 #44536a; }
.piano-key label { position: absolute; z-index: 1; right: 8px; top: 2px; color: #303c4e; font-size: 10px; font-weight: 700; }
.piano-key.black label { color: #78869a; }
.roll-stage { position: relative; height: 814px; overflow: hidden; background: #0a0f17; cursor: grab; touch-action: pan-y; user-select: none; }
.roll-stage:active { cursor: grabbing; }
.roll-stage.is-dragging .midi-note { transition: none; }
.roll-canvas { position: absolute; inset: 0 auto 0 50%; height: 814px; will-change: transform; }
.grid-row, .beat-line, .midi-note, .bend-line { position: absolute; }
.grid-row { left: -10000px; width: 20000px; height: var(--row-height); border-bottom: 1px solid #1c2737; }
.grid-row.black { background: rgba(40,54,73,.3); }
.beat-line { top: 0; height: 100%; width: 1px; background: #1d2939; }
.beat-line.major { width: 2px; background: var(--workspace-grid); }
.midi-note { z-index: 2; height: 16px; min-width: 5px; margin-top: 3px; overflow: visible; padding: 0; border: 1px solid #8fa4ff; border-radius: 3px; background: var(--note); box-shadow: inset 0 1px rgba(255,255,255,.22), 0 2px 5px rgba(0,0,0,.24); touch-action: none; cursor: ns-resize; transition: background .08s, transform .08s, box-shadow .08s; }
.midi-note.is-selected { z-index: 4; opacity: 1 !important; background: #839cff; box-shadow: 0 0 0 2px #0a0f17, 0 0 0 4px var(--accent); }
.resize-handle { position: absolute; z-index: 4; top: -4px; right: -5px; width: 11px; height: 15px; border: 0; border-radius: 3px; background: var(--accent); cursor: ew-resize; touch-action: none; }
.midi-note:not(.is-selected) .resize-handle { opacity: 0; pointer-events: none; }
.midi-note.is-selected .resize-handle { opacity: 1; }
.bend-line { z-index: 1; left: 0; top: 50%; width: 100%; height: 1px; background: rgba(197,208,255,.74); transform-origin: left center; }
.midi-note.current-note { z-index: 3; background: var(--note-active); border-color: var(--accent-strong); transform: scaleY(1.3); box-shadow: 0 0 0 2px #0a0f17, 0 0 0 4px var(--accent), 0 6px 18px rgba(98,230,199,.22); }
.playhead { position: absolute; z-index: 5; top: 0; bottom: 0; left: 50%; width: 2px; background: var(--accent); box-shadow: 0 0 10px rgba(98,230,199,.32); pointer-events: none; }
.playhead::before { content:""; position:absolute; top:0; left:-4px; border:5px solid transparent; border-top-color:var(--accent); }
.playhead span { position:absolute; top:12px; left:8px; padding:2px 5px; border-radius:3px; background:var(--accent); color:var(--paper); font-size:9px; font-weight:800; }
.segment-range { position: absolute; z-index: 1; top: 0; bottom: 0; display: none; background: rgba(98,230,199,.065); border-inline: 1px solid rgba(98,230,199,.34); pointer-events: none; }
.segment-range.is-visible { display: block; }
.segment-marker { position: absolute; z-index: 8; top: 0; width: 24px; min-height: 26px; padding: 0; border: 0; border-radius: 0 0 4px 4px; background: var(--accent); color: var(--paper); font: 800 10px var(--sans); touch-action: none; cursor: ew-resize; }
.marker-a { transform: translateX(-100%); }
.marker-b { transform: translateX(0); }
.live-pitch-marker { position: absolute; z-index: 7; left: calc(50% - 12px); top: 0; width: 24px; height: var(--row-height); opacity: 0; pointer-events: none; transform: translateY(0); transition: transform .09s linear, opacity .12s; }
.live-pitch-marker.is-visible { opacity: 1; }
.live-pitch-marker::before, .live-pitch-marker::after { content: ""; position: absolute; left: 50%; transform: translateX(-50%); }
.live-pitch-marker::before { top: 5px; width: 13px; height: 13px; border: 3px solid var(--accent); border-radius: 50%; background: var(--surface); box-shadow: 0 0 0 2px rgba(7,10,16,.9); }
.live-pitch-marker::after { top: 19px; height: 44px; border-left: 1px dashed var(--accent); }
.live-pitch-marker span { position: absolute; top: -3px; left: 24px; padding: 1px 4px; border-radius: 3px; background: var(--accent); color: var(--paper); font: 800 9px var(--sans); white-space: nowrap; }
.roll-legend { min-height: 38px; display: flex; align-items: center; gap: 26px; padding: 0 18px 0 120px; border-top: 1px solid var(--line); color: var(--muted); font-size: 11px; }
.roll-legend span:last-child { margin-left: auto; }
.roll-legend i { display:inline-block; width:10px; height:8px; margin-right:6px; border-radius:2px; background:var(--note); }
.roll-legend .active-key { background:var(--note-active); box-shadow:0 0 0 2px var(--accent); }
.roll-legend .selected-key { background:#839cff; box-shadow:0 0 0 2px var(--accent); }

.jianpu-section { display: grid; grid-template-columns: 102px minmax(0,1fr); min-height: 138px; border-top: 1px solid var(--line-strong); background: #0d141e; }
.jianpu-section > header { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 5px; padding: 14px 8px; border-right: 1px solid var(--line-strong); text-align: center; }
.jianpu-section h2 { margin: 0; color: var(--accent); font: 750 17px var(--sans); }
.jianpu-section > header > strong { color: var(--ink); font: 500 18px var(--serif); }
.jianpu-section > header > small { max-width: 78px; color: var(--muted); font-size: 9px; line-height: 1.35; }
.jianpu-viewport { position: relative; min-width: 0; overflow: hidden; }
.jianpu-track { position: absolute; inset: 0 auto 0 50%; height: 100%; will-change: transform; }
.jianpu-track::after { content: "低八度 · 中八度 · 高八度   ♯ 升号   ♭ 降号"; position: absolute; left: -10000px; bottom: 0; width: 20000px; height: 34px; padding-top: 8px; border-top: 1px solid var(--line); color: var(--muted); font-size: 10px; text-align: center; }
.jianpu-note { position: absolute; top: 15px; min-width: 20px; min-height: 72px; display: grid; place-items: center; padding: 7px 1px 20px; border: 1px solid transparent; border-radius: 5px; background: transparent; font: 600 25px var(--serif); cursor: pointer; transition: color .12s, background .12s, border-color .12s, transform .12s; }
.jianpu-note.current-note { border-color: var(--accent); background: var(--accent-soft); color: var(--accent-strong); transform: translateY(-2px); }
.jianpu-note.is-selected { box-shadow: inset 0 0 0 2px var(--accent); }
.jianpu-playhead { position: absolute; z-index: 3; inset: 0 auto 0 50%; width: 2px; background: var(--accent); pointer-events: none; }
.jianpu-playhead::after { content: ""; position: absolute; left: -5px; bottom: 25px; width: 12px; height: 12px; border-radius: 50%; background: var(--accent); }

.guitar-panel { border-bottom: 1px solid var(--line); background: #0c121b; }
.guitar-toolbar { min-height: 54px; display: flex; align-items: center; gap: 18px; padding: 7px 18px; border-bottom: 1px solid var(--line); }
.guitar-toolbar label { display: flex; align-items: center; gap: 8px; color: var(--muted); font-size: 11px; }
.guitar-toolbar select { min-height: 38px; padding: 0 28px 0 9px; border: 1px solid var(--line-strong); border-radius: 4px; background: var(--surface-raised); color: var(--ink); }
.guitar-toolbar strong { font: 720 14px var(--sans); }
.guitar-toolbar > span { margin-left: auto; color: var(--accent); font-size: 11px; }
.guitar-toolbar a { min-height: 38px; display: inline-flex; align-items: center; padding: 0 12px; border: 1px solid var(--accent); border-radius: 4px; color: var(--accent); font-size: 11px; font-weight: 700; text-decoration: none; }
.guitar-notation-help { flex-basis: 100%; margin: -2px 0 2px; color: var(--muted); font-size: 10px; }
.guitar-notation-help b { display: inline-grid; min-width: 18px; place-items: center; padding: 1px 3px; border: 1px solid #8fa4ff; border-radius: 4px; background: #1b2852; color: #c8d3ff; }
.guitar-notation-help em { color: var(--ink); font-style: normal; font-weight: 750; }
.guitar-viewport { display: grid; grid-template-columns: 82px minmax(0,1fr); min-height: 310px; }
.guitar-labels { position: relative; z-index: 4; height: 310px; border-right: 1px solid var(--line-strong); background: #111925; }
.guitar-label { position: absolute; inset: auto 0; height: 44px; padding: 12px 14px 0; border-bottom: 1px solid var(--line); color: var(--muted); font: 600 12px var(--serif); }
.guitar-scroll { min-width: 0; overflow-x: auto; overflow-y: hidden; scrollbar-color: #344359 transparent; }
.guitar-stage { position: relative; min-width: 100%; height: 310px; background: #090e16; touch-action: pan-x; user-select: none; }
.guitar-string { position: absolute; left: 0; right: 0; height: 44px; border-bottom: 1px solid #172231; }
.guitar-string::after { content: ""; position: absolute; inset: 21px 0 auto; border-top: 2px solid #66758a; box-shadow: 0 1px rgba(0,0,0,.5); }
.guitar-note { position: absolute; z-index: 3; min-width: 25px; height: 30px; display: grid; place-items: center; padding: 0 6px; border: 1px solid #8fa4ff; border-radius: 5px; background: #2c48b4; color: #f5f7ff; box-shadow: 0 3px 10px rgba(0,0,0,.28); font: 800 13px var(--sans); cursor: pointer; }
.guitar-note > small { position: absolute; bottom: 30px; left: 50%; display: flex; align-items: baseline; gap: 4px; padding: 2px 4px; border: 1px solid var(--line-strong); border-radius: 3px; background: rgba(15,22,33,.96); color: var(--ink); transform: translateX(-50%); white-space: nowrap; }
.guitar-note > small b { font: 750 9px var(--sans); letter-spacing: -.02em; }
.guitar-fret { line-height: 1; }
.guitar-note.is-temporary { border-style: dashed; }
.guitar-note.is-octave-shift::after { content: "↑8"; position: absolute; top: -9px; right: -8px; padding: 1px 3px; border-radius: 3px; background: var(--accent); color: var(--paper); font-size: 8px; }
.guitar-note.is-selected { box-shadow: 0 0 0 2px #090e16, 0 0 0 4px var(--accent); }
.guitar-note.current-note { z-index: 5; border-color: var(--accent-strong); background: var(--note-active); color: #05251f; box-shadow: 0 0 0 2px #090e16, 0 0 0 4px var(--accent); transform: translateY(-2px); }
.guitar-playhead { position: absolute; z-index: 7; inset: 0 auto 0 0; width: 2px; background: var(--accent); box-shadow: 0 0 10px rgba(98,230,199,.3); pointer-events: none; }
.guitar-playhead span { position: absolute; top: 6px; left: 7px; padding: 2px 5px; border-radius: 3px; background: var(--accent); color: var(--paper); font-size: 9px; font-weight: 800; }
.warnings { margin-top: 28px; padding: 16px; border-left: 3px solid var(--danger); background: #24141a; }
.warnings h2 { font-size: 14px; }
.warnings ul { margin-bottom: 0; }
.result-privacy { margin-top: 30px; color: var(--muted); font-size: 12px; }

body:has(#result-view:not([hidden])) .masthead { min-height: 58px; margin-inline: 26px; }
body:has(#result-view:not([hidden])) main { width: calc(100% - 36px); max-width: none; margin-bottom: 24px; }
body:has(#result-view:not([hidden])) .result-view { padding: 10px 0 20px; }
body:has(#result-view:not([hidden])) .local-badge-upload { display: none; }
body:has(#result-view:not([hidden])) .local-badge-result { display: inline; }

@media (max-width: 980px) {
  .upload-view { grid-template-columns: 1fr; min-height: 0; }
  .feature-list { display: grid; grid-template-columns: repeat(3,1fr); }
  .feature-list li { grid-template-columns: 1fr; padding-right: 16px; }
  .processing-layout { grid-template-columns: 1fr; gap: 0; }
  .processing-status { padding-top: 38px; }
  .transport-main { grid-template-columns: auto auto 1fr auto; }
  .time-display { grid-row: 2; }
  #transport-scrubber { grid-column: 2 / -1; grid-row: 2; }
  #follow-toggle { display: none; }
  .transport-utility { flex-wrap: wrap; }
  .segment-controls { flex-wrap: wrap; }
  .source-controls { margin-left: 0; }
  .microphone-panel { grid-template-columns: minmax(210px,1fr) auto minmax(170px,.8fr); }
  .tuning-meter { grid-column: 1 / 3; }
  .microphone-comparison { grid-column: 3; grid-row: 2; }
}

@media (max-width: 720px) {
  .masthead { margin-inline: 18px; }
  .local-badge { display: none; }
  body:has(#result-view:not([hidden])) .masthead { margin-inline: 18px; }
  main { width: calc(100% - 36px); }
  .upload-view { padding-top: 36px; gap: 34px; }
  .upload-copy h1 { font-size: 46px; }
  .feature-list { display: block; }
  .upload-panel { padding: 18px; }
  .drop-zone { min-height: 230px; }
  .metadata-grid { grid-template-columns: 1fr; }
  .result-header { align-items: stretch; flex-direction: column; }
  .song-mark { width: 62px; height: 62px; flex-basis: 62px; }
  .result-controls label { justify-content: flex-start; }
  .result-controls p { text-align: left; }
  .transport-main { grid-template-columns: auto 1fr; gap: 9px; padding: 10px 12px; }
  .transport-play { grid-column: 1; justify-content: center; }
  .time-display { grid-column: 2; grid-row: 1; justify-content: flex-end; }
  #transport-scrubber { grid-column: 1 / -1; grid-row: 2; }
  .transport-utility { align-items: flex-start; gap: 8px 12px; padding: 9px 12px; }
  .segment-controls { flex: 1 1 100%; }
  .segment-controls .utility-label { display: none; }
  .segment-controls button { flex: 1 1 auto; }
  .source-controls { flex: 1 1 auto; padding-left: 0; border-left: 0; }
  .export-menu { margin-left: auto; }
  .workspace-heading { min-height: 0; display: grid; grid-template-columns: minmax(0,1fr) 106px; gap: 0; padding: 0; }
  .workspace-heading > div:first-child { grid-column: 1 / -1; min-width: 0; padding: 9px 12px; }
  .workspace-heading > div:first-child span { font-size: 15px; }
  .workspace-heading > div:first-child small { line-height: 1.35; }
  .workspace-identity { align-items: center; flex-direction: row; justify-content: space-between; gap: 8px; }
  .note-editor { min-width: 0; min-height: 78px; padding: 8px 12px; border-inline: 0 1px solid var(--line); border-top: 1px solid var(--line); text-align: left; }
  .now-card { min-width: 0; min-height: 78px; padding: 9px; border-top: 1px solid var(--line); border-left: 2px solid var(--accent); }
  .now-card span, .now-card small { font-size: 9px; line-height: 1.3; }
  .now-card strong { font-size: 19px; }
  .note-editor-selection { grid-template-columns: auto 1fr; gap: 3px 8px; }
  .note-editor-selection > small { grid-column: 1 / -1; line-height: 1.35; }
  .note-editor-selection > button { grid-column: 1 / -1; min-height: 30px; padding-inline: 10px; justify-self: start; }
  .roll-ruler { margin-left: 66px; }
  .roll-viewport { grid-template-columns: 66px 1fr; }
  .keyboard { width: 66px; }
  .piano-key label { display: none; }
  .roll-legend { padding: 12px; flex-wrap: wrap; gap: 12px; }
  .roll-legend span:last-child { margin-left: 0; }
  .jianpu-section { grid-template-columns: 66px minmax(0,1fr); }
  .jianpu-section h2 { font-size: 17px; }
  .jianpu-section > header > strong { font-size: 14px; }
  .jianpu-section > header > small { display: none; }
  .jianpu-note { min-width: 34px; font-size: 24px; }
  .practice-tools > summary { padding-inline: 12px; }
  .microphone-panel { grid-template-columns: 1fr auto; gap: 10px 12px; padding: 12px; }
  .view-switch button { padding-inline: 9px; }
  .guitar-toolbar { align-items: flex-start; flex-wrap: wrap; gap: 8px 12px; padding: 10px 12px; }
  .guitar-toolbar label { flex: 1 1 100%; }
  .guitar-toolbar select { min-width: 0; flex: 1 1 auto; }
  .guitar-toolbar strong { flex: 1 1 120px; }
  .guitar-toolbar > span { margin-left: 0; }
  .guitar-viewport { grid-template-columns: 56px minmax(0,1fr); }
  .guitar-label { padding-left: 9px; }
  .microphone-intro { grid-column: 1; }
  .microphone-toggle { grid-column: 2; }
  .microphone-reading { grid-column: 1; }
  .microphone-comparison { grid-column: 2; grid-row: 2; text-align: right; }
  .tuning-meter { grid-column: 1 / -1; grid-row: 3; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition: none !important; animation: none !important; }
}