:root{color-scheme:light;--mint:#00cc88;--bg:#edf7f2;--muted:#67766f;--ink:#142b25;--line:#dce8e2}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,'PingFang SC','Microsoft YaHei',sans-serif}main{width:100%;max-width:480px;min-height:100dvh;margin:auto;padding:22px 24px 16px;background:#f4faf7}header{display:flex;justify-content:space-between;align-items:center;gap:14px;margin-bottom:26px}header a{display:flex;align-items:center;gap:7px;font-size:15px;color:inherit;text-decoration:none;font-weight:700}header img{width:22px;height:22px}header span{font-size:10px;color:var(--muted)}button,input,select{font:inherit}button{border:0;cursor:pointer;color:inherit;touch-action:manipulation}button:focus-visible,a:focus-visible,summary:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #159e7a;outline-offset:4px}button:disabled{opacity:.5;cursor:wait}button:active{transform:translateY(1px)}button img{pointer-events:none}h2{margin:0;font-size:26px;line-height:1.4;overflow-wrap:anywhere}.player-top{display:flex;justify-content:space-between;align-items:center;font-size:14px;margin:0 0 26px}.player-top>span:first-child{font-weight:600}.player-caption{font-size:11px;color:var(--muted)}.cover{display:block;width:100%;aspect-ratio:1;object-fit:cover;border-radius:15px;box-shadow:0 16px 40px #0e413514}.songline{margin:26px 0 12px}.songline p{font-size:12px;color:var(--muted);margin:7px 0 0}.play-song{display:flex;align-items:center;gap:8px;border-radius:30px;padding:10px 16px;background:#86efbf;font-size:15px;font-weight:700}.play-song img{width:20px;height:20px}.play-song span{font-size:10px;font-weight:400;border-left:1px solid #239c7166;padding-left:9px}.listening{margin-top:32px}progress{display:block;width:100%;height:4px;border:0;border-radius:10px;overflow:hidden;accent-color:var(--mint)}progress::-webkit-progress-bar{background:#d1dfd8}progress::-webkit-progress-value{background:var(--mint)}.time-labels{display:flex;justify-content:space-between;font-size:10px;color:var(--muted);margin-top:9px;font-variant-numeric:tabular-nums}.transport{display:flex;align-items:center;justify-content:space-between;margin:16px 0}.transport>span{font-size:11px;line-height:1.7;color:var(--muted)}.round{width:64px;height:64px;border-radius:50%;display:grid;place-items:center;background:#00ac6e}.round img{width:29px;height:29px;filter:invert(1)}.upload{display:flex;align-items:center;flex-direction:column;gap:5px;cursor:pointer;font-size:10px;color:var(--muted);padding:10px}.upload img{width:23px;height:23px;opacity:.6}.upload input{position:absolute;width:1px;height:1px;opacity:0}.upload:focus-within{outline:2px solid var(--mint);border-radius:8px}#playerStatus{font-size:11px;color:var(--muted);text-align:center;line-height:1.6;min-height:18px}footer{margin-top:24px;text-align:center;color:var(--muted);font-size:9px;letter-spacing:1px}#difficultySheet{border:0;border-radius:26px 26px 0 0;width:min(480px,100%);max-width:100%;max-height:90dvh;margin:auto auto 0;padding:27px 24px max(24px,env(safe-area-inset-bottom));color:var(--ink);background:#fff;box-shadow:0 -16px 80px #052a2726;overflow:auto}#difficultySheet::backdrop{background:#06181685}.sheet-header{display:flex;align-items:center;justify-content:space-between;gap:10px}.sheet-header h2{font-size:24px}.sheet-subtitle{font-size:13px;color:var(--muted);margin:8px 0 22px}.sheet-song{display:flex;gap:13px;align-items:center;margin-bottom:22px}.sheet-song img{width:58px;height:58px;object-fit:cover;border-radius:9px}.sheet-song strong{font-size:16px;display:block;max-width:310px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.sheet-song span{display:block;font-size:11px;color:var(--muted);margin-top:6px}.clip-controls{padding:4px 13px;background:#f5f8f6;border-radius:12px}.clip-controls label{display:flex;justify-content:space-between;align-items:center;gap:8px;font-size:12px;margin:10px 0}.clip-controls p{font-size:10px;color:var(--muted)}select,input[type=number]{border:1px solid #dce6df;border-radius:7px;background:#fff;padding:7px;color:var(--ink);font-size:12px}input[type=number]{width:76px}.sectionlabel{display:flex;justify-content:space-between;align-items:center;margin:22px 0 12px;font-size:14px;font-weight:600}.sectionlabel small{font-size:10px;color:var(--muted);font-weight:400}.difficulties{display:flex;gap:12px}.difficulties button{flex:1;text-align:left;padding:17px;background:#f5f7f6;border:1px solid transparent;border-radius:12px}.difficulties strong{font-size:18px}.difficulties span{display:block;font-size:11px;color:var(--muted);margin-top:6px}.difficulties .selected{border-color:#00b879;background:#effcf4}.difficulties .selected strong{color:#00885b}.primary{width:100%;border-radius:14px;background:#00ca85;color:#062e22;padding:17px;font-size:16px;font-weight:650;margin-top:20px}.primary:hover,.play-song:hover{filter:brightness(.96)}.ghost{padding:10px 12px;border:1px solid var(--line);background:transparent;border-radius:9px;font-size:11px}#status{font-size:11px;color:var(--muted);line-height:1.6}.readyline{display:flex;justify-content:space-between;gap:8px;font-size:10px;color:#008b5b}details{border-top:1px solid var(--line);margin-top:16px;padding-top:13px;font-size:11px;color:var(--muted);line-height:1.8}summary{cursor:pointer;font-size:12px;color:var(--ink)}.feedback-settings label{display:flex;justify-content:space-between;align-items:center;padding:7px 0;font-size:12px}.feedback-settings input{accent-color:#00b879}.feedback-settings input[type=checkbox]{width:19px;height:19px}.feedback-settings input[type=range]{width:145px}.feedback-settings p{font-size:10px;line-height:1.6}#feedbackStatus:empty{display:none}[hidden]{display:none!important}
/* The player and game share the same city artwork; gameplay stays high-contrast. */
body[data-screen=game],body[data-screen=result]{--mint:#c3ffa7;--ink:#eef8f8;--muted:#b0c2d1;--line:#496074;color-scheme:dark;background:#071826}body[data-screen=game] main,body[data-screen=result] main{background:#081a2a}body[data-screen=game] header img,body[data-screen=result] header img{filter:invert(1)}.gamehead{display:flex;align-items:center;gap:9px;flex-wrap:wrap}.game-cover{width:33px;height:38px;object-fit:cover;border-radius:5px}.gamehead strong{font-size:13px;display:block;max-width:140px;overflow:hidden;white-space:nowrap;text-overflow:ellipsis}.gamehead p{font-size:9px;color:var(--muted);margin:4px 0}.gamehead #pause{margin-left:auto}.score-box{width:100%;text-align:right;margin-top:4px}.score-box small{display:block;font:9px ui-monospace,monospace;letter-spacing:2px;color:var(--muted)}#score{display:block;font:700 25px ui-monospace,monospace;color:var(--mint);letter-spacing:2px}.life-row{display:flex;align-items:center;gap:8px;margin-top:9px;font-size:10px;color:var(--mint)}.life-row progress{flex:1;height:5px}.life-row progress::-webkit-progress-bar{background:#314459}.life-row progress::-webkit-progress-value{background:#c3ffa7}.life-row.low{color:#ff927c}.life-row.low progress::-webkit-progress-value{background:#ff927c}.progress{height:2px;background:#304454;margin:12px 0}.progress i{display:block;background:#b8f8cd;height:100%;width:0}.arena{height:min(62dvh,600px);min-height:300px;position:relative;overflow:hidden;isolation:isolate;touch-action:none;border-radius:12px;background:#0c2134 url('assets/pixel-city.png') center/cover}.arena::before{content:'';position:absolute;inset:0;background:#031423ad;z-index:-1}canvas{display:block;width:100%;height:100%}.laneButtons{position:absolute;inset:0;display:flex}.laneButtons button{width:25%;background:transparent;color:#d9ecfc8a;font:14px ui-monospace,monospace;padding:0;padding-top:min(52dvh,500px);user-select:none;-webkit-user-select:none;border-right:1px solid #badcf218}.laneButtons button:active{background:#c3ffa714;transform:none}#countdown{position:absolute;top:36%;width:100%;text-align:center;font:700 60px ui-monospace,monospace;color:var(--mint);pointer-events:none}.hint{font-size:10px;text-align:center;color:var(--muted);line-height:1.8;margin:13px 0}#pauseOverlay{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;flex-direction:column;padding:28px;background:#071a2af2;z-index:4}#pauseOverlay p{font-size:12px;color:var(--muted)}#pauseOverlay .primary{margin:20px 0;max-width:280px}#result{text-align:center;padding:14px 0}h1{font-size:32px;letter-spacing:-1px;margin:12px 0 25px}.eyebrow{color:var(--mint);font-size:11px;letter-spacing:2px}.mint{color:var(--mint)}.resultcard{position:relative;border-radius:20px;overflow:hidden;padding:24px;background:#10283b;border:1px solid #39566b}.result-cover{width:100%;height:130px;object-fit:cover;object-position:center 48%;border-radius:10px}#resultSong{font-size:12px;color:var(--muted);margin:18px 0 0}#grade{font:900 76px ui-monospace,monospace;color:var(--mint);margin:12px 0 0}#finalScore{font:700 32px ui-monospace,monospace;letter-spacing:3px}.stats{display:flex;justify-content:space-between;margin:26px 0}.stats strong,.stats span{display:block}.stats strong{font:700 20px ui-monospace,monospace}.stats span{font-size:10px;color:var(--muted);margin-top:7px}#breakdown{font-size:10px;line-height:1.8;color:var(--muted)}#back{margin-top:14px}.muted{font-size:11px;color:var(--muted);line-height:1.7}body[data-screen=result] .primary{background:#bafaac}body[data-screen=game] footer{margin-top:16px}@media(min-width:700px){main{margin:24px auto;border-radius:24px;min-height:calc(100dvh - 48px);box-shadow:0 20px 80px #03261f12;padding:26px 30px}#difficultySheet{margin:auto;border-radius:24px;max-height:90dvh}.arena{height:min(62dvh,560px)}}@media(max-width:360px){main{padding:16px}.game-cover{display:none}.gamehead strong{max-width:113px}header span{font-size:8px}.sheet-song strong{max-width:230px}#difficultySheet{padding:23px 18px}.cover{border-radius:12px}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}}

/* Keep the playfield quieter than the artwork, with clear touch targets. */
.arena::before{background:#031423c9}.laneButtons button{position:relative;padding:0}.laneButtons button span{position:absolute;top:85%;bottom:2%;left:5px;right:5px;display:grid;place-items:center;border:1px solid #698ba0;border-radius:9px;background:#1b354bd9;color:#d5e7ef}.laneButtons button:active span{background:#45675a;border-color:#c3ffa7}
@media(min-width:700px) and (max-height:820px){.cover{max-height:300px;aspect-ratio:auto;object-position:center 48%}.player-top{margin-bottom:18px}.songline{margin-top:20px}.listening{margin-top:22px}main{min-height:0}}

#challengeInvite{padding:18px;margin-bottom:22px;background:#e2f7ed;border:1px solid #97d4b5;border-radius:14px}#challengeInvite strong{font-size:16px}#challengeInvite p{font-size:12px;line-height:1.7;overflow-wrap:anywhere}#challengeInvite .primary{margin:6px 0 12px}#sharePanel{text-align:left;margin-top:18px;font-size:12px}#shareLink{width:100%;margin:8px 0 12px;padding:10px;border:1px solid #68889b;border-radius:8px;background:#0c2032;color:#e0edf2;resize:vertical;font-size:11px}#shareStatus{font-size:12px;line-height:1.6}#challengeComparison:not(:empty){color:#c3ffa7;font-size:15px;font-weight:600}

.songline{display:flex;align-items:center;justify-content:space-between;gap:12px}.songline>div{min-width:0}.songline h2{overflow-wrap:anywhere}#openLibrary{flex-shrink:0;border-color:#94cbb1;color:#087749;background:#ecfff4;min-height:42px;font-size:12px}#librarySheet{border:0;border-radius:24px;width:min(460px,calc(100% - 24px));max-height:85dvh;padding:24px;color:#122d23;background:#fafffc;overflow:auto}#librarySheet::backdrop{background:#06181685}.library-songs{display:grid;gap:10px}.library-song{display:flex;align-items:center;text-align:left;gap:14px;width:100%;padding:18px 12px;border:1px solid #dce9e2;border-radius:12px;background:#fff;color:#122d23;min-height:76px}.library-song strong,.library-song small{display:block}.library-song strong{font-size:17px}.library-song small{font-size:11px;color:#587365;margin-top:7px}.song-number{color:#608272;font:14px monospace}.song-choice{margin-left:auto;font-size:12px;color:#087749}.library-song[aria-pressed=true]{background:#ddf9ea;border-color:#00b879}.library-song[aria-pressed=true] .song-choice{font-size:0}.library-song[aria-pressed=true] .song-choice::after{content:'当前歌曲';font-size:12px}#libraryStatus,.library-note{font-size:11px;line-height:1.8;color:#587365}.library-note{margin-top:18px}

/* Listening is the primary scene; the rhythm game is a contextual action. */
body:not([data-screen=game]):not([data-screen=result]){background:#dcebe4}body:not([data-screen=game]):not([data-screen=result]) main{background:linear-gradient(165deg,#e1f0e8,#f4f8f5 68%)}
.player-top{margin:12px 0 24px;font-size:13px}.cover{border-radius:18px;box-shadow:0 18px 36px #123e2824}.songline{margin:28px 0 10px}.songline h2{font-size:27px;letter-spacing:.2px}.songline p{font-size:13px;line-height:1.6}.listening{margin-top:23px}#previewProgress{display:block;width:100%;height:4px;accent-color:#169b66;cursor:pointer;margin:0}.time-labels{font-size:11px;margin-top:12px}.music-controls{margin:23px 0 28px;gap:8px}.music-controls button{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;background:transparent;padding:6px;color:#234c3b;min-height:48px;min-width:44px}.music-controls img{width:27px;height:27px}.music-controls span{font-size:9px;color:#607b6d}.music-controls .round{width:70px;height:70px;background:#10ac72;border-radius:50%;box-shadow:0 6px 18px #00a46a26}.music-controls .round img{width:34px;height:34px}.music-controls .skip-control img{width:31px;height:31px}.play-song{width:100%;border:1px solid #a2dec0;border-radius:16px;padding:16px 14px;gap:12px;background:#e1f8eb;text-align:left}.play-song span{border:0;padding:0}.play-song .play-song-icon{display:grid;place-items:center;width:42px;height:42px;border-radius:12px;background:#0cac72;flex-shrink:0}.play-song-icon img{width:23px;height:23px;filter:invert(1)}.play-song-copy{flex:1}.play-song-copy strong{display:block;font-size:19px;color:#08633f}.play-song-copy small{display:block;font-size:10px;margin-top:5px;color:#53826b;line-height:1.5}.play-song .play-song-tag{font-size:10px;border-radius:6px;background:#c5efd8;color:#267451;padding:5px;white-space:nowrap}.player-secondary{display:flex;align-items:center;justify-content:space-between;margin-top:14px;font-size:10px;color:#698073}.player-secondary .upload{padding:6px 0;font-size:10px;text-decoration:underline;text-underline-offset:3px}#playerStatus{font-size:10px;margin:10px 0;min-height:16px}@media(max-width:380px){.play-song{gap:8px;padding:12px}.play-song-copy small{font-size:9px}.play-song .play-song-tag{font-size:9px}.music-controls{gap:4px}}

.library-cover{width:48px;height:48px;object-fit:cover;border-radius:8px;flex-shrink:0}.arena::before{background:#031423b3}.library-song{padding:12px}.library-song strong{font-size:16px}.library-song small{font-size:10px}
.music-controls #openLibrary{border:0;background:transparent;padding:6px;color:#234c3b}.music-controls .round:hover{background:#079863}
@media(max-width:699px){.player-top{margin:8px 0 18px}.songline{margin-top:22px}.music-controls{margin:18px 0 22px}.player-secondary{margin-top:10px}}

@media(max-width:699px){.cover{width:min(100%,34dvh);margin-left:auto;margin-right:auto}.songline h2{font-size:25px}.player-top{margin-top:4px}header{margin-bottom:16px}}

/* Compact contextual action beside the track title. */
.songline>div{width:100%}.song-title-row{display:flex;align-items:center;gap:12px;min-width:0}.song-title-row h2{margin:0;min-width:0;overflow-wrap:anywhere}.play-song-inline{flex:0 0 auto;min-height:44px;padding:8px 15px;border:1px solid #9bd8b8;border-radius:22px;background:#dcf6e7;color:#087248;font-size:13px;font-weight:650;white-space:nowrap}.play-song-inline:hover{background:#c8efd9}.play-song-inline:focus-visible{outline:2px solid #008f5f;outline-offset:3px}