*{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg:#f5f5f5;--white:#fff;--text:#1a1a1a;--text2:#4a4a4a;--muted:#8a8a8a;
  --line:#e5e5e5;--line2:#efefef;--hover:#f0f0f0;
  --green:#1a7f4e;--green-bg:#f0faf5;--green-light:#e6f4ee;--green-bd:#b3dfc8;
  --sw:220px;--player-h:76px;
}
html,body{height:100%;height:100dvh;overflow:hidden;font-family:'Inter',system-ui,sans-serif;-webkit-font-smoothing:antialiased;background:var(--bg);color:var(--text)}
.shell{display:flex;height:100vh;height:100dvh;overflow:hidden;width:100%}
.sb{width:var(--sw);background:var(--white);border-right:1px solid var(--line);display:flex;flex-direction:column;flex-shrink:0;z-index:10}
.sb-top{height:52px;padding:0 14px;display:flex;align-items:center;border-bottom:1px solid var(--line2);flex-shrink:0}
.sb-logo{font-size:15px;font-weight:600;letter-spacing:-.2px}
.sb-logo em{font-style:normal;color:var(--green)}
.sb-nav{flex:1;overflow-y:auto;padding:8px;display:flex;flex-direction:column;gap:1px}
.sb-nav::-webkit-scrollbar{width:0}
.sb-sec{padding:10px 8px 4px;font-size:10px;font-weight:600;color:var(--muted);letter-spacing:.6px;text-transform:uppercase;display:flex;justify-content:space-between;align-items:center}
.sb-sec-add{background:none;border:none;color:var(--muted);cursor:pointer;width:18px;height:18px;display:flex;align-items:center;justify-content:center;border-radius:5px}
.sb-sec-add:hover{background:var(--hover);color:var(--green)}
.ni{display:flex;align-items:center;gap:9px;padding:8px 9px;border-radius:8px;cursor:pointer;border:none;background:transparent;color:var(--text2);font-family:inherit;font-size:13px;font-weight:500;text-align:left;width:100%;transition:background .12s,color .12s;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.ni:hover{background:var(--hover);color:var(--text)}
.ni.active{background:var(--green-light);color:var(--green)}
.ni .ic{width:16px;height:16px;flex-shrink:0;opacity:.6;display:inline-flex}
.ni.active .ic{opacity:1}
.ni .ic svg{width:16px;height:16px;stroke-width:1.7;fill:none;stroke:currentColor}
.sb-bot{padding:10px;border-top:1px solid var(--line2)}
.add-track-btn{width:100%;padding:9px;border-radius:9px;border:none;background:var(--green);color:#fff;font-family:inherit;font-size:13px;font-weight:600;cursor:pointer}
.add-track-btn:hover{background:#156a41}
.main{flex:1;display:flex;flex-direction:column;overflow:hidden;min-width:0}
.hdr{height:52px;display:flex;align-items:center;padding:0 20px;background:rgba(255,255,255,.95);backdrop-filter:blur(12px);border-bottom:1px solid var(--line);flex-shrink:0;gap:10px}
.hdr-t{font-size:15px;font-weight:600}
.hdr-sub{font-size:12px;color:var(--muted)}
.mob-btn{display:none;width:34px;height:34px;border-radius:8px;border:none;background:transparent;cursor:pointer;align-items:center;justify-content:center;color:var(--muted)}
.mob-btn svg{width:16px;height:16px;stroke-width:1.8;fill:none;stroke:currentColor}
.content{flex:1;overflow-y:auto;padding:16px 20px calc(var(--player-h) + 24px)}
.track-row{display:flex;align-items:center;gap:12px;padding:9px 10px;border-radius:9px;cursor:pointer}
.track-row:hover{background:var(--hover)}
.track-row.playing{background:var(--green-light)}
.track-idx{width:22px;text-align:center;font-size:12px;color:var(--muted);flex-shrink:0}
.track-row.playing .track-idx{color:var(--green)}
.track-cover{width:36px;height:36px;border-radius:6px;background:var(--green-light);flex-shrink:0;display:flex;align-items:center;justify-content:center;overflow:hidden}
.track-cover img{width:100%;height:100%;object-fit:cover}
.track-cover svg{width:16px;height:16px;stroke:var(--green);fill:none;stroke-width:1.7}
.track-meta{min-width:0;flex:1}
.track-title{font-size:13px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.track-artist{font-size:11px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.track-dur{font-size:12px;color:var(--muted);flex-shrink:0;font-variant-numeric:tabular-nums}
.track-add{width:26px;height:26px;border-radius:7px;border:none;background:transparent;color:var(--muted);cursor:pointer;flex-shrink:0;display:flex;align-items:center;justify-content:center}
.track-add:hover{background:var(--green-light);color:var(--green)}
.track-add svg{width:14px;height:14px;stroke-width:2;fill:none;stroke:currentColor}
.empty,.loading{padding:40px 10px;text-align:center;color:var(--muted);font-size:13px}
.err{background:#fff0f0;border:1px solid #fcc;border-radius:8px;padding:10px 14px;font-size:12px;color:#c00;margin-bottom:12px}
.player{position:fixed;left:var(--sw);right:0;bottom:0;height:var(--player-h);background:var(--white);border-top:1px solid var(--line);display:flex;align-items:center;padding:0 18px;gap:14px;z-index:50}
.player-cover{width:44px;height:44px;border-radius:7px;background:var(--green-light);flex-shrink:0;display:flex;align-items:center;justify-content:center;overflow:hidden}
.player-cover img{width:100%;height:100%;object-fit:cover}
.player-cover svg{width:18px;height:18px;stroke:var(--green);fill:none;stroke-width:1.7}
.player-meta{width:160px;flex-shrink:0;min-width:0}
.player-title{font-size:13px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.player-artist{font-size:11px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.player-ctrl{display:flex;align-items:center;gap:6px;flex-shrink:0}
.pbtn{width:32px;height:32px;border-radius:50%;border:none;background:transparent;color:var(--text2);cursor:pointer;display:flex;align-items:center;justify-content:center}
.pbtn:hover{background:var(--hover)}
.pbtn.main{width:36px;height:36px;background:var(--green);color:#fff}
.pbtn.main:hover{background:#156a41}
.pbtn svg{width:15px;height:15px}
.player-seek{flex:1;display:flex;align-items:center;gap:8px;min-width:0}
.time{font-size:11px;color:var(--muted);width:34px;flex-shrink:0;font-variant-numeric:tabular-nums;text-align:center}
input[type=range]{-webkit-appearance:none;appearance:none;width:100%;height:4px;border-radius:2px;background:var(--line2);outline:none;cursor:pointer}
input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:11px;height:11px;border-radius:50%;background:var(--green);cursor:pointer}
input[type=range]::-moz-range-thumb{width:11px;height:11px;border-radius:50%;background:var(--green);border:none;cursor:pointer}
.player-vol{display:flex;align-items:center;gap:6px;width:90px;flex-shrink:0}
.player-vol svg{width:15px;height:15px;stroke:var(--muted);fill:none;stroke-width:1.8;flex-shrink:0}
.modal-ovl{display:none;position:fixed;inset:0;background:rgba(0,0,0,.55);z-index:300;align-items:center;justify-content:center;padding:20px}
.modal-ovl.show{display:flex}
.modal-sheet{background:var(--white);width:100%;max-width:400px;border-radius:16px;padding:20px;max-height:85vh;overflow-y:auto;position:relative}
.modal-title{font-size:16px;font-weight:600;margin-bottom:14px}
.modal-field{margin-bottom:12px}
.modal-field label{display:block;font-size:12px;color:var(--muted);margin-bottom:5px}
.modal-field input,.modal-field select{width:100%;padding:10px 12px;border:1px solid var(--line);border-radius:8px;font-family:inherit;font-size:14px;background:var(--white);box-sizing:border-box}
.modal-field input:focus,.modal-field select:focus{outline:none;border-color:var(--green-bd)}
.modal-err{color:#dc2626;font-size:12px;margin-bottom:10px;display:none}
.modal-err.show{display:block}
.modal-actions{display:flex;gap:8px;margin-top:16px}
.modal-btn{flex:1;padding:11px;border-radius:8px;font-family:inherit;font-size:14px;font-weight:600;cursor:pointer;border:1px solid var(--line);background:transparent;color:var(--text2)}
.modal-btn:hover{background:var(--hover)}
.modal-btn.primary{background:var(--green);border-color:var(--green);color:#fff}
.modal-btn.primary:hover{background:#156a41}
.modal-close{position:absolute;top:14px;right:14px;width:28px;height:28px;border-radius:50%;border:none;background:transparent;color:var(--muted);font-size:16px;cursor:pointer}
.toast{display:none;position:fixed;bottom:calc(var(--player-h) + 16px);left:50%;transform:translateX(-50%);background:#111827;color:#fff;padding:10px 18px;border-radius:10px;font-size:13px;font-weight:500;z-index:400}
.toast.show{display:block}
.toast.error{background:#dc2626}
.overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,.5);z-index:199}
.overlay.show{display:block}
@media(max-width:640px){
  .sb{position:fixed;top:0;left:0;bottom:0;width:260px!important;transform:translateX(-100%);transition:transform .25s cubic-bezier(.4,0,.2,1);z-index:200;box-shadow:4px 0 20px rgba(0,0,0,.15)}
  .sb.open{transform:translateX(0)}
  .mob-btn{display:flex}
  .player{left:0}
  .player-meta{width:auto;flex:1}
  .player-vol{display:none}
  .content{padding:14px 14px calc(var(--player-h) + 20px)}
}