#music-workspace[hidden]{display:none!important}
#music-workspace{position:fixed;inset:0;z-index:1100;background:var(--bg-secondary,#f5f5f7);color:var(--text,#1d1d1f);display:flex;flex-direction:column;font:14px/1.5 system-ui,-apple-system,"PingFang SC",sans-serif}
#music-workspace *{box-sizing:border-box}
#music-workspace .music-head,#music-workspace footer,#music-upload-bar{flex-shrink:0}
#music-workspace [hidden]{display:none!important}
#music-workspace button{border:1px solid var(--border,#d2d2d7);border-radius:9px;background:var(--bg,#fff);color:var(--text,#1d1d1f);padding:9px 14px;font:inherit;font-weight:600;cursor:pointer;white-space:nowrap;transition:background .15s,border-color .15s,box-shadow .15s}
#music-workspace button:hover{background:var(--bg-hover,#ebebed);border-color:#9fc3bc}
#music-workspace button:focus-visible{outline:2px solid var(--accent,#0071e3);outline-offset:2px}
#music-workspace button.primary{background:var(--accent,#0071e3);border-color:var(--accent,#0071e3);color:var(--bg,#fff);box-shadow:0 6px 16px #0f766e26}
#music-workspace button.primary:hover{background:#0c635c}
#music-workspace button.ghost{background:transparent}
#music-workspace button.ghost:hover{background:var(--bg-hover,#ebebed)}
#music-workspace button.danger{background:#b42318;border-color:#b42318;color:var(--bg,#fff)}
#music-workspace button.danger:hover{background:#9a1c13}
#music-workspace button.danger-text{color:#b42318;border-color:#e3c8c4;background:transparent}
#music-workspace button.danger-text:hover{background:#fbeae7;border-color:#d3a49d}
#music-workspace button.mini{padding:4px 10px;font-size:12px;border-radius:7px}
.music-head{display:flex;align-items:center;gap:14px;padding:13px 20px;background:var(--bg,#fff);border-bottom:1px solid var(--border,#d2d2d7)}
.music-head h2{margin:0;font-size:18px;letter-spacing:-.01em}
.music-head span{flex:1;color:var(--text-secondary,#6e6e73);font-size:13px}
.music-layout{display:flex;flex:1;min-height:0}
.music-layout aside{width:236px;flex-shrink:0;overflow:auto;padding:14px;background:var(--bg-secondary,#f5f5f7);border-right:1px solid var(--border,#d2d2d7)}
.side-item{display:flex;align-items:center;gap:8px;width:100%;text-align:left;margin-bottom:5px;background:transparent}
.side-item span{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.side-item small{color:#6c837e;font-size:12px;font-weight:600}
.side-item:hover{background:#dde9e6}
.side-item.active{background:var(--accent,#0071e3);border-color:var(--accent,#0071e3);color:var(--bg,#fff)}
.side-item.active small{color:#c9ece5}
.music-layout aside h3{display:flex;justify-content:space-between;align-items:center;font-size:12px;color:var(--text-secondary,#6e6e73);margin:16px 0 7px;font-weight:700}
.music-layout aside h3:first-of-type{margin-top:12px}
.side-empty{font-size:12px;color:#7d918c;margin:2px 0 8px;line-height:1.5}
.music-layout main{flex:1;min-width:0;overflow:auto;padding:16px 18px 26px;overscroll-behavior:contain}
.music-tools{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-bottom:10px}
.music-tools input[type=text],.music-tools input:not([type]){flex:1;min-width:180px;padding:10px 12px;border:1px solid var(--border,#d2d2d7);border-radius:9px;font:inherit;background:var(--bg,#fff)}
.music-tools input:focus-visible{outline:2px solid var(--accent,#0071e3);outline-offset:1px}
.music-tools select,#music-workspace footer select{padding:8px 10px;border:1px solid var(--border,#d2d2d7);border-radius:9px;background:var(--bg,#fff);font:inherit;color:var(--text,#1d1d1f)}
.music-scope-bar strong{font-size:15px;margin-right:6px;max-width:34vw;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.music-flex-gap{flex:1}
#music-count{color:var(--text-secondary,#6e6e73);font-size:13px;padding:0 2px}
#music-message{color:#8a4b16;min-height:20px;margin:2px 0 8px}
.music-row{display:flex;gap:10px;align-items:center;padding:10px 12px;border:1px solid var(--border,#d2d2d7);border-radius:10px;margin-bottom:6px;background:var(--bg,#fff);transition:border-color .15s,box-shadow .15s}
.music-row:hover{border-color:#b9d2cc;box-shadow:0 4px 14px #17333a0d}
.music-row input[type=checkbox]{width:19px;height:19px;accent-color:var(--accent,#0071e3);flex-shrink:0}
.music-title{flex:1;min-width:150px;overflow:hidden}
.music-title strong{display:block;overflow:hidden;white-space:nowrap;text-overflow:ellipsis;font-size:14px}
.music-title small{display:block;color:var(--text-secondary,#6e6e73);margin-top:3px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:12px}
.music-row.playing{border-color:var(--accent,#0071e3);background:#eaf6f2;box-shadow:inset 3px 0 0 var(--accent,#0071e3)}
.music-row.playing .music-title strong::before{content:"▶ ";color:var(--accent,#0071e3);font-size:11px}
.music-dur{color:var(--text-secondary,#6e6e73);font-variant-numeric:tabular-nums;min-width:44px;text-align:right}
.music-pages{justify-content:center}
.music-pages span{color:var(--text-secondary,#6e6e73);font-variant-numeric:tabular-nums}
#music-rows>p{color:var(--text-secondary,#6e6e73);padding:18px 4px}
#music-upload-details{background:var(--bg,#fff);border:1px solid var(--border,#d2d2d7);border-radius:10px;padding:10px 14px;margin-top:14px}
#music-upload-details summary{cursor:pointer;font-weight:600;color:var(--text,#1d1d1f)}
#music-uploads{max-height:240px;overflow:auto;margin-top:8px}
.music-upload-item{display:flex;align-items:center;gap:8px;padding:6px 0;border-bottom:1px dashed #e4ebe9;font-size:13px}
.music-upload-item:last-child{border-bottom:0}
.music-upload-name{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.music-chip{flex-shrink:0;padding:2px 9px;border-radius:999px;background:#eef2f1;color:var(--text-secondary,#6e6e73);font-size:12px;font-weight:600}
.music-chip.ok{background:#e3f4e8;color:#18794e}
.music-chip.bad{background:#fbe9e7;color:#b42318}
#music-upload-bar{background:var(--bg,#fff);border-top:1px solid #cfe0dc;padding:9px 18px}
.music-upload-line{display:flex;justify-content:space-between;gap:14px;font-size:13px;color:var(--text,#1d1d1f);margin-bottom:6px}
.music-upload-line span{color:var(--text-secondary,#6e6e73);min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.music-upload-track{height:6px;border-radius:999px;background:#e2eae8;overflow:hidden}
.music-upload-track i{display:block;height:100%;background:var(--accent,#0071e3);border-radius:999px;transition:width .25s}
#music-workspace footer{display:flex;flex-direction:column;gap:8px;padding:12px 18px;background:#10312d;color:#e8f4f0;border-top:1px solid #0a241f}
.music-player-main{display:flex;align-items:center;gap:10px}
#music-workspace footer button{border-color:#2c544d;background:#1b443e;color:#e8f4f0}
#music-workspace footer button:hover{background:#265650;border-color:#3d6b62}
.player-toggle{width:56px;height:56px;border-radius:999px!important;background:#34d3b4!important;border-color:#34d3b4!important;color:#0b2b26!important;font-size:15px;padding:0!important;box-shadow:0 8px 20px #34d3b433}
.player-toggle:hover{background:#4adfc2!important}
.music-now-wrap{flex:1;min-width:0;padding:0 4px}
.music-now-wrap strong{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:15px}
.music-player-sub{display:flex;align-items:center;gap:10px}
#music-time{min-width:92px;text-align:right;font-variant-numeric:tabular-nums;color:#a7c8c0;font-size:13px}
#music-seek{flex:1;min-width:80px;accent-color:#34d3b4}
#music-workspace footer select{background:#1b443e;border-color:#2c544d;color:#e8f4f0}
#music-workspace footer button.ghost{background:transparent}
.music-dragging .music-layout main{outline:2px dashed var(--accent,#0071e3);outline-offset:-10px;border-radius:12px;background:#eaf4f1}
.music-picker{border:0;border-radius:16px;max-height:78vh;max-width:92vw;min-width:300px;width:360px;overflow:auto;box-shadow:0 18px 80px #17333a40;padding:20px;background:var(--bg,#fff);color:var(--text,#1d1d1f)}
.music-picker::backdrop{background:#172a3a66}
.music-picker h3{margin:0 0 12px;font-size:16px}
.music-picker>button{display:block;width:100%;margin:8px 0;text-align:left}
.music-picker>.ghost{color:var(--text-secondary,#6e6e73)}
.music-picker .music-queue-row{display:flex;align-items:center;gap:6px}
.music-picker .music-queue-row button{width:auto}
.music-picker .music-queue-row button:first-child{flex:1;min-width:100px}
.music-form form{display:flex;flex-direction:column;gap:10px}
.music-field span{display:block;font-size:12px;font-weight:700;color:var(--text-secondary,#6e6e73);margin-bottom:5px}
.music-field input{width:100%;padding:10px 12px;border:1px solid var(--border,#d2d2d7);border-radius:9px;font:inherit}
.music-field input:focus-visible{outline:2px solid var(--accent,#0071e3);outline-offset:1px}
.music-form-actions{display:flex;justify-content:flex-end;gap:8px;margin-top:4px}
.music-form-actions button{width:auto!important;margin:0!important}
.music-confirm-text{color:var(--text-secondary,#6e6e73);font-size:13px;line-height:1.65;margin:0 0 4px}
@media(max-width:760px){
  .music-head{padding:10px 12px;gap:8px}
  .music-head h2{font-size:16px}
  .music-head span{font-size:11px}
  .music-layout{flex-direction:column}
  .music-layout aside{display:flex;align-items:center;gap:6px;width:auto;overflow-x:auto;padding:8px 10px;border-right:0;border-bottom:1px solid var(--border,#d2d2d7);scrollbar-width:none}
  .music-layout aside::-webkit-scrollbar{display:none}
  .music-layout aside h3{margin:0 4px 0 10px;white-space:nowrap}
  .music-layout aside h3:first-of-type{margin-left:2px}
  .music-layout aside>button,.music-layout aside div>button{display:inline-flex;width:auto;margin:0}
  #music-folders,#music-playlists{display:contents}
  .side-empty{display:none}
  .side-item small{display:none}
  .music-layout main{padding:12px 12px 20px}
  .music-row{flex-wrap:wrap;gap:7px;padding:9px 10px}
  .music-row .primary{order:-1 }
  .music-dur{min-width:0}
  .music-scope-bar strong{max-width:100%}
  .music-player-main{flex-wrap:wrap}
  .player-toggle{width:48px;height:48px}
  #music-time{min-width:78px}
  .music-upload-line{flex-direction:column;gap:2px}
}

/* Music is a normal study-room tab; the main navigation always remains visible. */
#pane-music{min-height:0;overflow:hidden}
#music-workspace{position:relative;inset:auto;z-index:auto;width:100%;height:100%;min-height:0;font-family:inherit;background:var(--bg-secondary);color:var(--text)}
.music-head{padding:14px 20px;background:var(--bg)}
.music-layout aside{width:220px;background:var(--bg);padding:16px 12px}
.music-layout main{background:var(--bg-secondary);padding:18px 22px;min-height:0}
#music-workspace .side-item{background:transparent;border-color:transparent;font-weight:500}
#music-workspace .side-item:hover{background:var(--bg-hover)}
#music-workspace .side-item.active{background:color-mix(in srgb,var(--accent) 12%,var(--bg));color:var(--accent);border-color:transparent}
#music-workspace .side-item.active small{color:var(--accent)}
#music-workspace .music-new-playlist{margin-top:10px;border:1px dashed var(--border);color:var(--text-secondary);justify-content:center}
.music-folder-panel{background:var(--bg);border:1px solid var(--border);border-radius:10px;padding:10px 14px;margin-bottom:14px}
.music-folder-panel summary{cursor:pointer;font-size:13px;font-weight:600;color:var(--text-secondary)}
.music-folder-head{display:flex;justify-content:space-between;align-items:center;gap:12px;margin:12px 0;color:var(--text-secondary);font-size:12px}
#music-folders{display:flex;gap:8px;flex-wrap:wrap}
#music-folders .side-item{width:auto;margin:0;border:1px solid var(--border);min-width:100px;max-width:100%}
#music-workspace button{padding:7px 12px;font-size:13px;font-weight:500;border-radius:7px;box-shadow:none}
#music-workspace button.primary{background:var(--accent);border-color:var(--accent);color:#fff;box-shadow:none}
#music-workspace button.primary:hover{background:var(--accent-hover)}
.music-row{border-radius:8px;box-shadow:none;padding:9px 12px}
.music-row.playing{background:color-mix(in srgb,var(--accent) 7%,var(--bg));border-color:var(--accent);box-shadow:inset 3px 0 var(--accent)}
.music-row:hover{box-shadow:none;border-color:var(--border)}
#music-message:empty{min-height:0;margin:0}
#music-workspace footer{background:var(--bg);color:var(--text);border-top:1px solid var(--border);padding:12px 20px;gap:8px}
#music-workspace footer button{background:transparent;color:var(--text);border-color:transparent;box-shadow:none}
#music-workspace footer button:hover{background:var(--bg-hover);border-color:transparent}
#music-workspace .player-btn{width:40px;height:40px;display:inline-flex;align-items:center;justify-content:center;padding:0}
#music-workspace .player-toggle{width:44px;height:44px;display:inline-flex;align-items:center;justify-content:center;background:var(--accent)!important;border-color:var(--accent)!important;color:#fff!important;box-shadow:none}
#music-workspace .player-toggle:hover{background:var(--accent-hover)!important}
#music-workspace footer select{background:var(--bg);border-color:var(--border);color:var(--text);padding:6px 9px;font-size:12px}
#music-workspace #music-time{color:var(--text-secondary)}
#music-workspace #music-seek{accent-color:var(--accent)}
.music-queue-button{order:5;font-size:22px!important;line-height:1;padding:0 8px!important}
#music-mode{order:4}
.music-player-main{gap:6px}
.music-now-wrap{margin-left:14px}
@media(max-width:760px){
 .music-layout aside{width:auto;padding:8px;display:block;max-height:155px;overflow:auto}
 .music-layout aside h3{display:inline-block;margin:8px}
 #music-playlists{display:inline}
 #music-workspace .music-new-playlist{display:inline-flex;width:auto;margin:0 0 0 8px}
 .music-layout main{padding:12px}
 .music-folder-head{flex-wrap:wrap}
 #music-workspace footer{padding:10px 12px}
 .music-row .music-title{min-width:130px}
 .music-now-wrap{margin-left:6px}
}

/* Compact transport: controls, metadata and seek share one desktop row. */
#music-workspace footer{flex-direction:row;align-items:center;gap:20px;padding:8px 20px}
.music-player-main{flex:0 1 360px;min-width:150px;flex-wrap:nowrap}
.music-player-main>button{flex-shrink:0}
.music-now-wrap{min-width:0;margin-left:10px}
.music-player-sub{flex:1 1 320px;min-width:0}
#music-workspace #music-time{min-width:0;white-space:nowrap;flex-shrink:0}
#music-workspace #music-seek{width:0;min-width:60px;cursor:pointer}
#music-mode,.music-queue-button{flex-shrink:0}
@media(max-width:760px){
 #music-workspace footer{gap:12px;padding:8px 12px}
 .music-player-main{flex-basis:220px}
 .music-now-wrap{margin-left:4px}
}
@media(max-width:540px){
 #music-workspace footer{gap:8px;padding:8px}
 .music-player-main{flex:0 0 auto;min-width:0;gap:2px}
 #music-workspace .player-btn{width:32px;height:40px}
 #music-workspace .player-toggle{width:40px;height:40px}
 .music-now-wrap{display:none}
 .music-player-sub{gap:5px}
 #music-workspace #music-time{display:none}
 #music-workspace #music-seek{min-width:40px}
 #music-workspace footer select{max-width:70px;padding:6px 3px}
 .music-queue-button{padding:0 4px!important}
}

/* Shared compact library toolbar; folders expand only on request. */
.music-folder-panel[hidden]{display:none}
.music-toolbar>button,.music-toolbar>select{flex-shrink:0;white-space:nowrap}
.music-toolbar #music-query{min-width:140px;width:180px;padding:8px 10px;font-size:13px}
.music-toolbar #music-sort{font-size:13px;padding:7px 8px}
.music-toolbar #music-scope{max-width:180px}

.music-header-tools{flex:1;min-width:0;margin:0 8px;justify-content:flex-end}
.music-header-tools #music-query{flex:1;min-width:140px;max-width:420px;padding:8px 10px;font-size:13px}
.music-header-tools button,.music-header-tools select{white-space:nowrap}
.music-toolbar{gap:8px}
@media(max-width:900px){.music-head{flex-wrap:wrap}.music-header-tools{order:3;flex-basis:100%;margin:0}.music-header-tools #music-query{max-width:none}}

/* Native dialogs live outside the tab and need complete, scoped styles. */
dialog.music-picker{position:fixed;inset:0;margin:auto;width:min(520px,calc(100vw - 32px));min-width:0;max-width:calc(100vw - 32px);max-height:calc(100dvh - 40px);padding:24px;border:1px solid var(--border,#ddd);border-radius:16px;background:var(--bg,#fff);color:var(--text,#222);box-shadow:8px 18px 48px #14213a30;font:14px/1.5 -apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif}
dialog.music-picker:not([open]){display:none}
dialog.music-picker h3{font-size:19px;margin-bottom:12px}
dialog.music-picker button{font:inherit;min-height:38px;padding:8px 14px;border:1px solid var(--border,#d2d2d7);border-radius:8px;background:var(--bg,#fff);color:var(--text,#222);cursor:pointer}
dialog.music-picker button:hover{background:var(--bg-hover,#f2f5fa)}
dialog.music-picker button.primary{background:var(--accent,#3376da);border-color:var(--accent,#3376da);color:white}
dialog.music-picker button.danger{background:#c83535;border-color:#c83535;color:white}
dialog.music-picker button:disabled{opacity:.45;cursor:not-allowed}
dialog.music-picker button:focus-visible{outline:2px solid var(--accent,#3376da);outline-offset:2px}
dialog.music-picker .music-form-actions{border-top:1px solid var(--border,#ddd);padding-top:16px;margin-top:20px;gap:10px}
dialog.music-picker .music-choice-list{display:flex;flex-direction:column;gap:8px;max-height:42vh;overflow:auto;margin:16px 0}
dialog.music-picker .music-choice{text-align:left;overflow-wrap:anywhere;width:100%}
dialog.music-picker .music-choice[aria-pressed=true]{border-color:var(--accent,#3376da);background:color-mix(in srgb,var(--accent,#3376da) 12%,var(--bg,#fff));color:var(--accent,#3376da)}
dialog.music-picker .music-empty{padding:20px 12px;text-align:center;color:var(--text-secondary,#666);background:var(--bg-secondary,#f5f6f8);border-radius:10px}
dialog.music-picker .music-folder-panel{padding:0;border:0;margin:16px 0}
dialog.music-picker .music-field input{color:var(--text,#222);background:var(--bg,#fff)}
dialog.music-picker .music-queue-row{margin:8px 0}
dialog.music-picker .music-queue-row button:first-child{min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* Keep library actions visible while the song list scrolls. */
#music-workspace .music-layout main{padding-top:0}
#music-workspace .music-toolbar{position:sticky;top:0;z-index:2;background:var(--bg-secondary,#f5f5f7);padding:12px 0;margin-bottom:0;border-bottom:1px solid var(--border,#d2d2d7)}
#music-workspace #music-rows{padding-top:10px}