@font-face{font-family:Douyin;src:url('/assets/fonts/DouyinSans-Bold.ttf') format('truetype');font-display:swap}
:root{--bg:#f3ebdd;--paper:#fffdf8;--ink:#1c1813;--ink-2:#796c55;--line:#e6dbc7;--coral:#f5350c;--coral-soft:#fbe2d6;--cream:#fbf3e2;--amber:#ffd27a;--body:'MiSans','PingFang SC','Microsoft Yahei',sans-serif;--title:'Douyin','PingFang SC',sans-serif;--num:'Archivo Black','Arial Black',sans-serif}
*{box-sizing:border-box}body{margin:0;background:#efe8d8;color:var(--ink);font-family:var(--body);padding:28px 20px;display:flex;align-items:center;flex-direction:column}p,h1,h2{margin:0}button,a,input{-webkit-tap-highlight-color:transparent}button{font:inherit;cursor:pointer}button:disabled{cursor:wait;opacity:.55}button:focus-visible,a:focus-visible,input:focus-visible{outline:3px solid #2f9bf5;outline-offset:4px}button:active:not(:disabled){transform:scale(.97)}button{transition:transform .16s,background-color .16s,opacity .16s}svg{width:24px;height:24px;fill:none;stroke:currentColor;stroke-width:1.75;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0}.deck-title{text-align:center;font-weight:600;font-size:15px;letter-spacing:.12em;margin-bottom:6px}.deck-sub{text-align:center;font-size:12px;color:var(--ink-2);margin-bottom:24px;line-height:1.6}.phone{width:390px;height:844px;border-radius:38px;overflow:hidden;position:relative;background:#f7f1e5;box-shadow:0 18px 44px rgba(0,0,0,.20);display:flex;flex-direction:column;text-align:left;line-height:1.5}.phone::before{content:'';position:absolute;inset:0;pointer-events:none;opacity:.6;z-index:0;background-image:radial-gradient(rgba(28,24,19,.055) .6px,transparent .6px);background-size:5px 5px}.head,.mid,.foot{position:relative;z-index:1}.head{padding:38px 20px 16px;flex:0 0 auto}.nav{display:flex;align-items:center;height:44px;margin-bottom:14px;gap:8px}.nav-title{font-size:14px;font-weight:500}.brand{margin-left:auto;color:var(--coral);font-family:var(--title);font-size:17px}.icon-button{width:48px;height:48px;display:flex;align-items:center;justify-content:center;border:0;flex-shrink:0}.back{width:44px;height:44px;border-radius:50%;color:var(--ink);text-decoration:none;margin-left:-12px}.back:hover{background:var(--coral-soft)}.back svg{width:22px;height:22px}.song-heading{display:flex;justify-content:space-between;align-items:center}.eyebrow{color:var(--coral);font-family:Inter,sans-serif;font-size:10px;font-weight:800;letter-spacing:2px}.song-heading h1{font-family:var(--title);font-size:36px;line-height:1.25;margin:4px 0 8px;font-weight:500}.song-meta{font-size:12px;color:var(--ink-2)}.song-meta span{padding:0 5px;color:#bcb2a0}.excerpt-length{text-align:right;align-self:flex-end;padding-bottom:3px}.excerpt-length strong{font-family:var(--num);display:block;font-size:24px;line-height:1.2;letter-spacing:-1px}.excerpt-length>span{font-size:11px;color:var(--ink-2)}.mid{flex:1 1 auto;min-height:0;display:flex;align-items:center;padding:0 20px 12px}.stage{width:100%;height:100%;max-height:432px;min-height:340px;border-radius:20px;position:relative;overflow:hidden;display:flex;flex-direction:column;background:radial-gradient(95% 78% at 50% -26%,rgba(255,200,130,.40),rgba(255,155,75,.16) 46%,transparent 76%),radial-gradient(105% 82% at 50% 122%,rgba(6,4,2,.26),transparent 75%),linear-gradient(165deg,#282014,#130f09);color:var(--cream);box-shadow:inset 0 2px 0 rgba(255,235,200,.11),0 10px 24px rgba(74,49,26,.12)}.stage::before{content:'';position:absolute;inset:0;pointer-events:none;opacity:.04;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='150' height='150'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.8' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Cpath fill='%23fff' filter='url(%23n)' d='M0 0h150v150H0z'/%3E%3C/svg%3E")}.stage-heading{padding:18px 18px 4px;display:flex;justify-content:space-between;align-items:center;font-size:12px;flex:0 0 42px;position:relative}.stage-heading>span:first-child{color:var(--amber)}#line-count{font:13px var(--num);color:var(--cream);font-variant-numeric:tabular-nums}#line-count i{font:11px var(--body);color:#bcb2a0;margin-left:3px}.ribbon-wrap{position:relative;flex:1 1 auto;min-height:168px;width:100%}#ribbon{position:absolute;inset:0;display:block;width:100%;height:100%}.playhead-label{position:absolute;left:22%;top:10px;font-size:10px;color:#dfc49a;transform:translateX(-50%);pointer-events:none;transition:opacity .2s}.preparation{position:absolute;inset:25px 16px 8px;display:flex;flex-direction:column;align-items:center;justify-content:center;background:radial-gradient(ellipse at center,rgba(28,24,19,.98),rgba(28,24,19,.93) 46%,rgba(28,24,19,.05) 80%);pointer-events:none;opacity:1;transition:opacity .18s}.preparation.is-hidden{opacity:0;visibility:hidden}.preparation-title{color:#e8dac1;font-size:12px;margin-bottom:8px;height:20px}.count-trio{display:flex;align-items:center;gap:20px;height:72px}.count-trio span{width:50px;text-align:center;color:#a69a88;font:46px/1 var(--num);transition:transform .1s,color .1s,text-shadow .1s}.count-trio span:first-child{font-size:54px;color:#d6c6ab}.count-trio span.is-active{color:var(--amber);text-shadow:0 0 22px rgba(255,210,122,.3);transform:scale(1.12)}.count-trio span.is-accent{color:#fff0ca}.count-groups{display:flex;gap:6px;margin:14px 0 9px}.count-groups span{height:3px;width:25px;border-radius:3px;background:#5b503e;transition:background-color .12s}.count-groups .done{background:#a28a60}.count-groups .active{background:var(--amber)}.count-caption{font-size:11px;color:#c3b59d;height:18px}.lyrics{position:relative;flex:0 0 108px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;margin:0 12px;border-top:1px solid rgba(255,235,200,.08)}.lyric-current{font-size:23px;line-height:1.5;min-height:36px;font-weight:600;white-space:nowrap;letter-spacing:.15px}.lyric-next{font-size:16px;line-height:1.5;min-height:24px;color:#b8aa91;white-space:nowrap;transition:opacity .2s,transform .2s}.lyric-word{position:relative;display:inline-block;color:#e6d8bf;transition:transform .12s}.lyric-word.is-current{transform:translateY(-2px)}.word-fill{position:absolute;inset:0;color:var(--amber);clip-path:inset(0 100% 0 0);pointer-events:none}.lyric-current.is-entering{opacity:.6;transform:translateY(3px)}.lyric-current{transition:opacity .16s,transform .16s}.stage-bottom{height:33px;flex:0 0 33px;padding:0 18px 12px;display:flex;justify-content:space-between;align-items:center;color:#b6a890;font-size:10px;position:relative}.target-key{display:flex;align-items:center;gap:5px}.target-key i{width:12px;height:5px;border-radius:3px;background:var(--amber)}.end-overlay{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;background:rgba(28,24,19,.95);gap:14px}.end-overlay[hidden]{display:none}.end-overlay h2{font-family:var(--title);font-size:27px;font-weight:500}.end-overlay .eyebrow{color:var(--amber);font-size:9px}.end-overlay>p:last-child{font-size:12px;color:#c3b59d}.foot{flex:0 0 166px;padding:6px 20px 20px;min-height:166px}.progress{margin-bottom:10px}.time-labels{display:flex;justify-content:space-between;align-items:center;font-size:11px;color:var(--ink-2);font-family:var(--num);font-variant-numeric:tabular-nums}.time-labels>span:first-child{color:var(--ink)}#seek{display:block;appearance:none;-webkit-appearance:none;width:100%;margin:0;height:28px;background:transparent;cursor:pointer;--played:0%}#seek::-webkit-slider-runnable-track{height:4px;border-radius:3px;background:linear-gradient(to right,var(--coral) 0 var(--played),#ded2bd var(--played) 100%)}#seek::-webkit-slider-thumb{appearance:none;-webkit-appearance:none;width:13px;height:13px;margin-top:-4.5px;border-radius:50%;background:var(--coral);box-shadow:0 0 0 4px #f7f1e5}#seek::-moz-range-track{height:4px;border-radius:3px;background:#ded2bd}#seek::-moz-range-progress{height:4px;background:var(--coral)}#seek::-moz-range-thumb{border:0;width:13px;height:13px;border-radius:50%;background:var(--coral)}.actions{display:flex;gap:12px;align-items:center}.secondary{background:var(--paper);border:1px solid var(--line);color:var(--ink);border-radius:15px;width:56px;height:54px}.primary{display:flex;flex:1;align-items:center;justify-content:center;gap:8px;height:54px;border-radius:15px;background:var(--coral);color:#fff;border:0;font:16px var(--title);box-shadow:0 8px 18px rgba(245,53,12,.22)}.primary svg{width:22px;height:22px}.feedback{font-size:11px;color:var(--ink-2);min-height:18px;text-align:center;margin-top:12px}.feedback:empty{visibility:hidden}.feedback.error{color:#b82f19}.cap{text-align:center;margin-top:14px;font-size:12px;color:#5a4a34;width:390px;line-height:1.7}audio{display:none}
@media(max-width:480px){body{padding:0;background:var(--bg)}.deck-head,.cap{display:none}.phone{width:100%;height:100svh;min-height:600px;border-radius:0;box-shadow:none}.head{padding-top:max(16px,env(safe-area-inset-top))}.foot{padding-bottom:max(18px,env(safe-area-inset-bottom))}}
@media(max-height:740px) and (max-width:480px){.head{padding-bottom:12px}.nav{margin-bottom:4px}.song-heading h1{font-size:31px;margin:2px 0 4px}.song-meta{font-size:11px}.eyebrow{font-size:9px}.excerpt-length strong{font-size:22px}.mid{padding-bottom:6px}.stage{min-height:312px}.lyrics{flex-basis:93px;gap:9px}.lyric-current{font-size:22px}.lyric-next{font-size:15px}.stage-heading{padding-top:13px;flex-basis:37px}.stage-bottom{height:27px;flex-basis:27px}.foot{flex-basis:146px;min-height:146px;padding-top:2px}.count-trio{height:60px}.count-trio span{font-size:39px}.count-trio span:first-child{font-size:47px}.count-groups{margin-top:9px}.preparation-title{margin-bottom:3px}}
@media(prefers-reduced-motion:reduce){button,.preparation,.count-trio span,.lyric-word,.lyric-current,.lyric-next{transition:none}.lyric-word.is-current{transform:none}}
/* The final 123 moves above the ribbon so the first notes are visible in advance. */
.preparation.is-final{inset:0 16px auto;height:52px;flex-direction:row;gap:12px;background:none}.preparation.is-final .preparation-title{font-size:11px;margin:0;height:auto}.preparation.is-final .count-trio{height:42px;gap:9px}.preparation.is-final .count-trio span{font-size:23px;width:23px}.preparation.is-final .count-trio span:first-child{font-size:27px}.preparation.is-final .count-groups,.preparation.is-final .count-caption{display:none}
[hidden]{display:none!important}.mode-switch{display:flex;align-items:center;background:#ede3d1;border-radius:12px;padding:2px}.mode-switch button{border:0;background:transparent;color:var(--ink-2);min-height:40px;padding:0 12px;font-size:13px;border-radius:10px}.mode-switch button[aria-pressed=true]{background:var(--paper);color:var(--ink);box-shadow:0 2px 4px #1c181309}.text-button{min-height:44px;border:0;background:none;color:var(--ink-2);padding:0 8px;font-size:12px;white-space:nowrap}.nav>#open-history{margin-left:auto;padding-right:0;color:var(--coral)}.headphone-option{font-size:11px;display:flex;align-items:center;gap:4px;margin:7px 0 0;min-height:24px;cursor:pointer}.headphone-option input{accent-color:var(--coral);height:17px;width:17px;margin:0 3px 0 0}.headphone-option>span{margin-left:auto;color:var(--ink-2);font-size:10px}.feedback{margin-top:3px;font-size:10px}.foot{flex-basis:178px;min-height:178px}.voice-key{background:#9cece0!important;margin-left:5px}.live-observation{position:absolute;left:18px;bottom:132px;display:flex;gap:6px;align-items:center;font-size:10px;color:#9cece0;padding:3px 7px;border-radius:5px;background:#1c1813e6;pointer-events:none}.record-dot{width:5px;height:5px;background:#ff7f63;border-radius:50%}.report-panel{position:absolute;inset:0;background:#f7f1e5;z-index:10;display:flex;flex-direction:column}.report-nav{padding:24px 14px 8px;display:flex;align-items:center;justify-content:space-between;flex:0 0 auto;font-size:14px;border-bottom:1px solid var(--line)}.report-nav>.text-button{color:var(--coral)}.report-scroll{padding:22px 20px 28px;overflow-y:auto;min-height:0;overscroll-behavior:contain}.report-hero h2{font-family:var(--title);font-weight:500;font-size:25px;line-height:1.4;margin:8px 0}.report-meta{font-size:11px;color:var(--ink-2)}.report-notice{font-size:11px;color:#756249;border-left:2px solid #c39d61;padding-left:9px;line-height:1.75;margin:18px 0}.metrics{border:1px solid var(--line);border-radius:16px;background:var(--paper);overflow:hidden}.metric{padding:16px;position:relative}.metric+.metric{border-top:1px solid var(--line)}.metric h3{margin:0;font-size:13px;font-weight:600}.metric-number{font-family:var(--num);font-size:29px;line-height:1.2;position:absolute;right:16px;top:14px;letter-spacing:-1px}.metric-number>span{font:11px var(--body);color:var(--ink-2);letter-spacing:0}.metric-detail{font-size:11px;color:var(--ink-2);margin-top:7px}.pitch-metric h3{color:#b13e22}.rhythm-metric h3{color:#426d65}.stability-metric h3{color:#476b88}.evidence-note{font-size:10px;color:var(--ink-2);line-height:1.75;margin:10px 0 22px}.replay-section{border-top:1px solid var(--line);padding-top:18px}.replay-section h3,.phrase-heading h3{font-size:15px;font-weight:600;margin:0}.replay-section audio{display:block;width:100%;height:44px;margin-top:12px}.download-row{display:flex;gap:22px;margin:5px 0 16px}.download-row a{font-size:12px;color:var(--coral);text-decoration:none;min-height:44px;display:flex;align-items:center}.phrase-heading{display:flex;align-items:center;justify-content:space-between;margin-top:12px}.phrase-heading>span{font-size:10px;color:var(--ink-2)}.phrase-row{padding:12px 0;border-bottom:1px solid var(--line)}.phrase-top{display:flex;align-items:center;gap:9px}.phrase-index{font:11px var(--num);color:#ab9676;width:18px;flex-shrink:0}.phrase-top h4{font-size:13px;font-weight:500;margin:0;flex:1}.phrase-top .text-button{color:var(--coral);padding-right:0}.phrase-summary{font-size:10px;color:var(--ink-2);line-height:1.85;margin:0 0 6px 27px}.phrase-details{margin-left:27px;font-size:11px}.phrase-details summary,.method-note summary{cursor:pointer;min-height:36px;padding:8px 0;color:#796c55}.review-graph{width:100%;height:90px;display:block;border-radius:8px;margin:7px 0}.note-chips{display:flex;flex-wrap:wrap;gap:5px;margin:8px 0}.note-chips>span{font-size:10px;padding:4px 6px;background:#eee4d3;border-radius:5px;color:#83664f}.note-chips>span.close{background:#e0ebe3;color:#446458}.method-note{font-size:11px;margin:16px 0;line-height:1.8}.method-note p{padding:6px 0 10px;color:var(--ink-2)}.report-actions{display:flex;flex-direction:column;gap:6px}.report-actions .primary{flex:0 0 50px}.delete-take{color:#917860}.history-note,.history-empty{font-size:12px;color:var(--ink-2);line-height:1.8;margin-bottom:20px}.history-row{display:flex;flex-direction:column;text-align:left;width:100%;padding:16px 0;border:0;border-bottom:1px solid var(--line);background:none;gap:6px;color:var(--ink)}.history-row strong{font-weight:500;font-size:14px}.history-row span{font-size:11px;color:var(--ink-2)}
@media(max-width:480px){.report-nav{padding-top:max(12px,env(safe-area-inset-top))}}
.metric-caveat,.graph-key{font-size:10px;color:var(--ink-2);line-height:1.7;margin-top:5px}.metric-caveat{color:#948064}
.playhead-label{left:36%}
#ribbon,.target-layer{z-index:0}.voice-layer{position:absolute;inset:0;width:100%;height:100%;display:block;z-index:2;pointer-events:none}.playhead-label{z-index:3}.preparation,.end-overlay{z-index:4}.voice-key{background:#46cfff!important}
@media(max-height:740px) and (max-width:480px){.foot{flex-basis:162px;min-height:162px}.stage{min-height:290px}.ribbon-wrap{min-height:147px}.live-observation{bottom:116px}.head{padding-top:max(8px,env(safe-area-inset-top));padding-bottom:10px}.nav{margin-bottom:2px}.report-hero h2{font-size:23px}.report-scroll{padding-top:18px}}
.input-options{display:flex;align-items:center;justify-content:space-between;min-height:44px}.input-options .headphone-option{margin:0;min-height:44px}.input-options .text-button{color:var(--coral);padding-right:0}.foot{flex-basis:198px;min-height:198px}.mic-panel{z-index:12}.mic-content h2{font:25px/1.4 var(--title);margin:0 0 28px}.mic-field{display:block;font-size:13px;margin-bottom:20px}.mic-field select{display:block;width:100%;min-height:48px;margin-top:8px;border:1px solid var(--line);border-radius:12px;background:var(--paper);padding:0 12px;font:13px var(--body);color:var(--ink);text-overflow:ellipsis}.mic-field select:focus-visible{outline:3px solid #2f9bf5;outline-offset:3px}.mic-actual,.mic-privacy{font-size:11px;color:var(--ink-2);line-height:1.7;overflow-wrap:anywhere}.mic-privacy{text-align:center;margin:12px 0}.mic-levels{margin:20px 0}.mic-level-row{display:grid;grid-template-columns:76px 1fr 54px;align-items:center;gap:10px;min-height:44px;font-size:11px;color:var(--ink-2)}.mic-level-row.selected{color:var(--ink);font-weight:600}.mic-db{text-align:right;font-variant-numeric:tabular-nums}.mic-level-row meter{width:100%;height:14px;accent-color:#4c8e79}.mic-status{font-size:13px;min-height:54px;line-height:1.7;margin:12px 0;color:#8c5733}.mic-status[data-kind=voiced]{color:#386c5c}.mic-content>.primary{width:100%}#live-level{width:30px;height:10px;accent-color:#46cfff;flex-shrink:0}
@media(max-height:740px) and (max-width:480px){.foot{flex-basis:182px;min-height:182px}.mic-content h2{font-size:23px;margin-bottom:20px}.mic-field{margin-bottom:16px}}
/* Reading-focused portrait layout: fixed lyrics and a less crowded pitch stage. */
.head{padding-top:24px;padding-bottom:14px}.nav{margin-bottom:6px}
.stage{max-height:none}.ribbon-wrap{min-height:160px}
.lyrics{flex-basis:106px;gap:9px;margin:0 14px;align-items:stretch}
.lyric-line{min-height:35px;line-height:35px;white-space:nowrap;text-align:center;font-size:clamp(20px,5.7vw,23px);font-weight:600;letter-spacing:0;transition:opacity .18s}
.lyric-line .lyric-word{color:#eadfc9;transform:none;transition:none}
.lyric-line[data-state=done]{opacity:.5}.lyric-line[data-state=upcoming]{opacity:.85}
.lyric-line[data-state=singing]{opacity:1}.lyric-line .lyric-word.is-current{transform:none}
.lyric-line .word-fill{color:var(--amber)}
.is-listening .foot{flex-basis:148px;min-height:148px}
@media(max-width:480px){.head{padding-top:max(12px,env(safe-area-inset-top))}}
@media(max-height:740px) and (max-width:480px){.head{padding-top:max(8px,env(safe-area-inset-top));padding-bottom:8px}.nav{margin-bottom:2px}.ribbon-wrap{min-height:147px}.lyrics{flex-basis:99px;gap:7px}.is-listening .foot{flex-basis:136px;min-height:136px}}
@media(prefers-reduced-motion:reduce){.lyric-line{transition:none}}
.key-version{display:inline-flex;min-height:44px;align-items:center;justify-content:flex-end;color:var(--coral);font-size:12px;text-decoration:none;padding:0 2px;transition:opacity .15s,transform .15s}.key-version:active{transform:scale(.97)}.key-version[aria-disabled=true]{opacity:.45;cursor:default}

/* Ershi: one large beat counter keeps a vertical screen clear. */
.count-trio{align-items:baseline;gap:8px}.count-trio strong{font:64px var(--num);color:#ffd27a;min-width:52px;text-align:center}.count-trio strong.is-active{text-shadow:0 0 22px #ffd27a55}.count-trio #beat-denominator{font-size:18px;width:auto;color:#b9a88d}.preparation.is-final .count-trio strong{font-size:26px;min-width:24px}.preparation.is-final .count-trio #beat-denominator{font-size:13px}.guide-option{display:flex;align-items:center;justify-content:center;gap:8px;min-height:44px;font-size:13px;color:var(--ink-2)}.guide-option input{accent-color:var(--coral);width:17px;height:17px}.guide-option[hidden]{display:none}.preparation.is-final .preparation-title{max-width:150px}.lyric-line{font-size:clamp(17px,5vw,23px)}