/* Thế Bấm: giữ bảng màu + bố cục player của bản gốc "Thế Bấm Từng Câu", thêm khung app (thư viện, soạn bài, quản trị) */
:root{
  --bg:#EEF1EE; --surface:#FFFFFF; --ink:#1A201D; --muted:#5E6A64; --line:#D3DBD6;
  --accent:#0E6B5A; --accent-soft:#D6ECE6; --next:#A86A12; --next-soft:#F6E8D0;
  --danger:#B3261E; --danger-soft:#F9DEDC; --ok:#1E7A3C; --ok-soft:#DAF2E1;
  --ui:"Be Vietnam Pro",system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:"JetBrains Mono",ui-monospace,Menlo,Consolas,monospace;
  --lyric:1;
  color-scheme:light;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --bg:#111513; --surface:#1A1F1C; --ink:#E6ECE8; --muted:#94A39B; --line:#2C3530;
  --accent:#4CC2A6; --accent-soft:#163A31; --next:#E3A84C; --next-soft:#3A2D16;
  --danger:#F2B8B5; --danger-soft:#3D1F1D; --ok:#7DD99A; --ok-soft:#173523; color-scheme:dark}}
:root[data-theme="dark"]{
  --bg:#111513; --surface:#1A1F1C; --ink:#E6ECE8; --muted:#94A39B; --line:#2C3530;
  --accent:#4CC2A6; --accent-soft:#163A31; --next:#E3A84C; --next-soft:#3A2D16;
  --danger:#F2B8B5; --danger-soft:#3D1F1D; --ok:#7DD99A; --ok-soft:#173523; color-scheme:dark}

*{box-sizing:border-box}
html,body{height:100%}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--ui);font-size:15px;line-height:1.5;-webkit-text-size-adjust:100%}
[hidden]{display:none!important}
a{color:var(--accent)}
img{max-width:100%}
h1,h2,h3{letter-spacing:-.01em;text-wrap:balance;margin:0}
h1{font-size:1.15rem;font-weight:700}
h2{font-size:1.05rem;font-weight:700}
.pad{padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}
.in{max-width:860px;margin:0 auto;display:flex;flex-direction:column;gap:10px}
.wide{max-width:1080px}
.muted{color:var(--muted)}
.mono{font-family:var(--mono)}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}

#app{height:100%;height:100dvh;display:flex;flex-direction:column}
#view{flex:1;min-height:0;overflow-y:auto;overscroll-behavior:contain;outline:none}
#view.fill{overflow:hidden;display:flex;flex-direction:column}

/* ---------- thanh trên ---------- */
.topbar{flex:none;background:var(--surface);border-bottom:1px solid var(--line);padding-top:env(safe-area-inset-top,0px)}
.tb-in{max-width:1080px;margin:0 auto;display:flex;align-items:center;gap:14px;min-height:54px}
.brand{display:flex;align-items:center;gap:8px;text-decoration:none;color:var(--ink);font-weight:700;font-size:1.05rem;flex:none}
.brand svg{width:30px;height:30px}
.tb-links{display:flex;gap:2px;flex:1;min-width:0}
.tb-links a{color:var(--muted);text-decoration:none;padding:6px 10px;border-radius:8px;font-weight:500;white-space:nowrap}
.tb-links a:hover{color:var(--ink);background:var(--bg)}
.tb-links a.on{color:var(--accent);background:var(--accent-soft)}
.tb-right{display:flex;align-items:center;gap:8px;flex:none}
.userbox{position:relative}
.avatar{width:32px;height:32px;border-radius:50%;object-fit:cover;background:var(--accent-soft);display:inline-grid;place-items:center;font-weight:700;color:var(--accent);flex:none}
.userbtn{display:flex;align-items:center;gap:8px;padding:3px 8px 3px 3px;border-radius:999px;min-height:38px}
.userbtn .nm{max-width:120px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.menu{position:absolute;right:0;top:calc(100% + 6px);background:var(--surface);border:1px solid var(--line);border-radius:12px;box-shadow:0 12px 32px -12px rgba(0,0,0,.35);min-width:220px;padding:6px;z-index:30;display:flex;flex-direction:column}
.menu a,.menu button{display:block;text-align:left;border:0;background:none;padding:9px 12px;border-radius:8px;color:var(--ink);text-decoration:none;font:inherit;cursor:pointer;min-height:0;width:100%}
.menu a:hover,.menu button:hover{background:var(--bg)}
.menu hr{border:0;border-top:1px solid var(--line);margin:6px 0}
.menu .who{padding:8px 12px;color:var(--muted);font-size:.85rem}
.bottomnav{display:none}

@media (max-width:720px){
  .tb-links{display:none}
  .userbtn .nm{display:none}
  #navAdd{display:none}
  .bottomnav{display:flex;flex:none;background:var(--surface);border-top:1px solid var(--line);padding-bottom:env(safe-area-inset-bottom,0px)}
  .bottomnav a{flex:1;text-align:center;padding:8px 4px 6px;color:var(--muted);text-decoration:none;font-size:.75rem;display:flex;flex-direction:column;align-items:center;gap:2px}
  .bottomnav a.on{color:var(--accent);font-weight:600}
  .bottomnav svg{width:22px;height:22px}
  #view.fill + .bottomnav{display:none}
}

/* ---------- nút & ô nhập ---------- */
button,.btn,.field{font:inherit;color:var(--ink);background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:7px 12px;cursor:pointer;min-height:38px;text-decoration:none;display:inline-flex;align-items:center;justify-content:center;gap:6px}
button:hover,.btn:hover{border-color:var(--accent)}
button:disabled{opacity:.5;cursor:not-allowed}
button:focus-visible,.btn:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible,a:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
button.primary,.btn.primary{background:var(--accent);color:var(--surface);border-color:var(--accent);font-weight:600}
button.danger,.btn.danger{color:var(--danger);border-color:var(--danger)}
button.ghost,.btn.ghost{background:transparent;border-color:transparent}
button.ghost:hover,.btn.ghost:hover{background:var(--surface);border-color:var(--line)}
.btn.sm,button.sm{min-height:34px;padding:5px 10px;font-size:.9rem}
.field{cursor:text;justify-content:flex-start}
select.field{cursor:pointer;padding:7px 8px}
input.field,textarea.field{width:100%}
label.lb{display:flex;flex-direction:column;gap:4px;font-size:.85rem;color:var(--muted);font-weight:500}
label.lb .field{color:var(--ink);font-size:15px}
.row{display:flex;gap:8px;flex-wrap:wrap;align-items:center}
.spacer{flex:1}

/* ---------- trang thư viện ---------- */
.page{padding-block:18px 48px}
.page > .in{gap:16px}
.hero{display:flex;flex-direction:column;gap:12px;padding-block:6px 2px}
.hero h1{font-size:1.6rem;line-height:1.2}
.hero p{margin:0;color:var(--muted);max-width:60ch}
.search{position:relative}
.search input{width:100%;font:inherit;font-size:1.05rem;color:var(--ink);background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:12px 14px 12px 42px;min-height:48px}
.search svg{position:absolute;left:14px;top:50%;transform:translateY(-50%);width:18px;height:18px;color:var(--muted)}
.chips{display:flex;gap:6px;flex-wrap:wrap}
.chip{border:1px solid var(--line);background:var(--surface);color:var(--ink);border-radius:999px;padding:4px 12px;font-size:.85rem;min-height:32px;cursor:pointer}
.chip.on{background:var(--accent);border-color:var(--accent);color:var(--surface)}
.chip small{color:inherit;opacity:.7;margin-left:4px;font-family:var(--mono)}
.listhead{display:flex;align-items:baseline;justify-content:space-between;gap:12px;flex-wrap:wrap}
.listhead .muted{font-size:.85rem}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:10px}
.song{position:relative;background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:12px 14px;display:flex;flex-direction:column;gap:6px;text-decoration:none;color:var(--ink);min-width:0}
.song:hover{border-color:var(--accent)}
.song .t{font-weight:600;font-size:1.02rem;line-height:1.3;padding-right:36px;overflow-wrap:anywhere}
.song .a{color:var(--muted);font-size:.85rem}
.song .cs{display:flex;gap:4px;flex-wrap:wrap}
.song .cs b{font-family:var(--mono);font-size:.75rem;color:var(--accent);background:var(--accent-soft);padding:1px 6px;border-radius:4px;font-weight:700}
.song .st{display:flex;gap:10px;color:var(--muted);font-size:.78rem;margin-top:auto;align-items:center;flex-wrap:wrap}
.song.feat{border-color:var(--next)}
.favbtn{position:absolute;top:8px;right:8px;width:34px;height:34px;min-height:0;padding:0;border-radius:50%;border-color:transparent;background:transparent;font-size:1.15rem;color:var(--muted)}
.favbtn.on{color:var(--next)}
.favbtn:hover{background:var(--bg)}
.tag{display:inline-block;font-size:.72rem;font-weight:600;letter-spacing:.03em;padding:1px 8px;border-radius:999px;background:var(--bg);color:var(--muted);border:1px solid var(--line);white-space:nowrap}
.tag.ok{background:var(--ok-soft);color:var(--ok);border-color:transparent}
.tag.wait{background:var(--next-soft);color:var(--next);border-color:transparent}
.tag.bad{background:var(--danger-soft);color:var(--danger);border-color:transparent}
.tag.link{background:var(--accent-soft);color:var(--accent);border-color:transparent}
.empty{background:var(--surface);border:1px dashed var(--line);border-radius:12px;padding:28px 18px;text-align:center;color:var(--muted);display:flex;flex-direction:column;gap:10px;align-items:center}
.more{align-self:center}
.foot{color:var(--muted);font-size:.8rem;padding-top:16px;border-top:1px solid var(--line);display:flex;gap:12px;flex-wrap:wrap}
.foot a{color:var(--muted)}
.skel{height:110px;border-radius:12px;background:var(--surface);border:1px solid var(--line);opacity:.6}
.note{background:var(--next-soft);color:var(--ink);border-radius:10px;padding:10px 12px;font-size:.9rem}
.note.bad{background:var(--danger-soft)}

/* ---------- player (bố cục bản gốc) ---------- */
.player{flex:1;min-height:0;display:flex;flex-direction:column}
.player header{flex:none;background:var(--bg);padding-block:6px;border-bottom:1px solid var(--line)}
/* một hàng: tiêu đề · điều khiển · thao tác; màn hẹp thì điều khiển xuống hàng 2 */
.p-bar{flex-direction:row!important;flex-wrap:wrap;align-items:center;gap:6px 10px!important;max-width:1080px}
.p-bar .p-title{flex:1 1 200px;order:1}
.p-bar>.controls{order:3;flex:1 1 100%}
.p-bar .p-actions{order:2}
.p-bar .p-panel{order:4;flex:1 1 100%;display:flex;flex-direction:column;gap:6px;padding:8px 0 4px;border-top:1px dashed var(--line)}
@media (min-width:980px){ .p-bar>.controls{order:2;flex:none} .p-bar .p-actions{order:3} }
.player header button,.player header .btn,.player header .field{min-height:34px;padding:5px 10px}
.player header .grp button{padding:5px 9px}
.player header .grp input{padding:5px 4px}
.player h1{font-size:1rem;line-height:1.3}
.p-title .sub{font-size:.8rem}
.p-actions .on,[data-r="more"].on{color:var(--next);border-color:var(--next)}
.morelbl{font-size:.82rem;color:var(--muted);white-space:nowrap}
@media (max-width:560px){
  .morelbl{display:none}
  .p-bar>.controls{gap:5px}
  .player header .p-bar>.controls>button{padding:5px 8px;min-width:34px}
  .player header .p-bar>.controls>[data-r=play]{flex:1 1 auto}
  .player header .grp button{padding:5px 7px;min-width:28px}
  .player header .grp span{padding:0 3px;min-width:0}
}
.player .scroll{flex:1;min-height:0;overflow-y:auto;overscroll-behavior:contain}
.player .scroll>.in{padding-block:12px 40vh;gap:12px}
.player .dock{flex:none;background:var(--bg);border-top:1px solid var(--line);padding-block:10px;padding-bottom:max(10px,env(safe-area-inset-bottom,0px));box-shadow:0 -6px 16px -12px var(--ink)}
.p-title{display:flex;align-items:center;gap:8px;min-width:0}
.p-title .tt{min-width:0}
.p-title h1{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.p-title .sub{color:var(--muted);font-size:.8rem;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.p-actions{display:flex;gap:6px;flex:none}
.p-actions button,.p-actions .btn{min-width:36px}
.meta{color:var(--muted);font-size:.85rem;font-variant-numeric:tabular-nums}
.controls{display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.grp{display:flex;align-items:center;border:1px solid var(--line);border-radius:8px;background:var(--surface);overflow:hidden}
.grp button{border:0;border-radius:0;min-width:36px;padding:7px 10px}
.grp span{font-family:var(--mono);font-size:.85rem;padding:0 6px;min-width:44px;text-align:center;font-variant-numeric:tabular-nums}
.grp label{font-size:.75rem;color:var(--muted);padding-left:10px;letter-spacing:.04em;text-transform:uppercase}
.grp input{width:52px;border:0;background:transparent;font:inherit;font-family:var(--mono);color:var(--ink);text-align:center;padding:7px 4px}
.hintline{font-size:.82rem;color:var(--muted);margin:0;min-width:0}
.hintline b{font-family:var(--mono);color:var(--ink);font-weight:700;margin-right:4px}
.tick{display:flex;align-items:center;gap:6px;font-size:.85rem;color:var(--muted)}

.stage{display:grid;grid-template-columns:minmax(0,2.2fr) minmax(0,1fr);gap:10px;align-items:end}
.card{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:10px 12px;display:flex;align-items:center;justify-content:space-between;gap:8px;min-width:0}
.ctext{display:flex;flex-direction:column;gap:2px;min-width:0}
.card.now{border-color:var(--accent);box-shadow:inset 0 0 0 1px var(--accent)}
.card.nx{border-style:dashed;border-color:var(--line);padding:6px 10px;opacity:.6;transition:opacity .15s,border-color .15s}
.card.nx.soon{opacity:1;border-color:var(--next)}
.nx .lbl{font-size:.62rem}
.lbl{font-size:.7rem;letter-spacing:.08em;text-transform:uppercase;font-weight:600}
.now .lbl{color:var(--accent)} .nx .lbl{color:var(--next)}
.cname{font-family:var(--mono);font-weight:700;font-size:2rem;line-height:1.1}
.nx .cname{font-size:1.15rem;color:var(--next)}
.nx .fing{display:none}
.fing{font-family:var(--mono);font-size:.75rem;color:var(--muted);letter-spacing:.06em}
.svgbox{flex:none;width:130px}.nx .svgbox{width:64px}
.card svg,.chordcard svg{width:100%;height:auto;display:block}
.beats{display:flex;gap:6px;margin-top:6px;min-height:10px}
.beats i{width:10px;height:10px;border-radius:50%;background:var(--line)}
.beats i.on{background:var(--accent)} .beats i.warn{background:var(--next)}
.beats i.bar{margin-left:6px}

.ln{display:flex;flex-wrap:wrap;row-gap:4px;align-items:flex-end}
.seg{display:inline-flex;flex-direction:column;cursor:pointer;border-radius:4px}
.seg b{font-family:var(--mono);font-size:calc(.85rem * var(--lyric));color:var(--accent);min-height:1.3em;padding-right:6px;white-space:nowrap}
.seg span{white-space:pre-wrap;font-size:calc(1rem * var(--lyric))}
.cur .seg span{font-size:calc(1.25rem * var(--lyric));font-weight:500}
.cur .seg.act b{background:var(--accent);color:var(--surface);border-radius:4px;padding:0 6px}
.cur .seg.act span{text-decoration:underline;text-decoration-color:var(--accent);text-underline-offset:5px;text-decoration-thickness:2px}
.seg.up b{background:var(--next-soft);color:var(--next);border-radius:4px;padding:0 6px}
.full{display:flex;flex-direction:column;gap:2px}
.fl{padding:6px 10px;border-radius:8px;border-left:3px solid transparent}
.fl.on{background:var(--accent-soft);border-left-color:var(--accent)}
.fl.sec{color:var(--muted);font-weight:600;font-size:.85rem;padding-top:12px}
.fl .seg b{font-size:calc(.78rem * var(--lyric))}
.fl.cur{padding-block:10px}
.fl.cur .seg b{font-size:calc(.9rem * var(--lyric))}
.player .fl:not(.cur){opacity:.72}
.fl.sec{opacity:1!important}
.credit{color:var(--muted);font-size:.82rem;display:flex;gap:8px;align-items:center;flex-wrap:wrap;padding:12px 10px 0;border-top:1px solid var(--line);margin-top:12px}

svg .str,svg .fr{stroke:var(--muted);stroke-width:1.2}
svg .nut{stroke:var(--ink);stroke-width:5}
svg .dot{fill:var(--ink)} .nx svg .dot{fill:var(--next)} .now svg .dot{fill:var(--accent)} .chordcard svg .dot{fill:var(--accent)}
svg text{fill:var(--muted);font-family:var(--mono);font-size:10px}
svg .mk{fill:none;stroke:var(--muted);stroke-width:1.4}

@media (max-width:560px){
  .stage{grid-template-columns:minmax(0,1.9fr) minmax(0,1fr);gap:8px}
  .cname{font-size:1.4rem} .nx .cname{font-size:1rem}
  .card{padding:8px;flex-direction:column;align-items:stretch}
  .ctext{flex-direction:row;flex-wrap:wrap;align-items:baseline;column-gap:8px}
  .svgbox{width:100%;max-width:120px;align-self:center}
  .nx .svgbox{width:100%;max-width:62px;align-self:center}
  .card.nx{padding:6px}
  .fing{display:none}
  .cur .seg span{font-size:calc(1.1rem * var(--lyric))}
  .controls{gap:6px}
  .p-actions .lg{display:none}
}
@media (prefers-reduced-motion:no-preference){.card.now{transition:box-shadow .15s}}

/* ---------- soạn bài ---------- */
.editor-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:16px;align-items:start}
.panel{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:14px;display:flex;flex-direction:column;gap:12px;min-width:0}
.panel textarea{font-family:var(--mono);font-size:.85rem;line-height:1.55;min-height:340px;background:var(--bg);resize:vertical;padding:10px}
.two{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.vis{display:flex;flex-direction:column;gap:6px}
.vis label{display:flex;gap:10px;align-items:flex-start;border:1px solid var(--line);border-radius:10px;padding:9px 12px;cursor:pointer}
.vis label:has(input:checked){border-color:var(--accent);background:var(--accent-soft)}
.vis input{margin-top:4px;accent-color:var(--accent)}
.vis b{display:block;font-weight:600}
.vis span{color:var(--muted);font-size:.82rem}
.hint{color:var(--muted);font-size:.85rem;margin:0}
.hint code{font-family:var(--mono);background:var(--bg);padding:1px 5px;border-radius:4px}
.preview{position:sticky;top:12px}
.preview .full{max-height:55vh;overflow:auto}
.chordgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(78px,1fr));gap:8px}
.chordcard{background:var(--bg);border-radius:8px;padding:6px;text-align:center}
.chordcard b{font-family:var(--mono);font-size:.85rem}
.chordcard.miss{opacity:.6}
@media (max-width:860px){ .editor-grid{grid-template-columns:1fr} .preview{position:static} }
@media (max-width:480px){ .two{grid-template-columns:1fr} }

/* ---------- danh sách dạng hàng (của tôi, quản trị) ---------- */
.rows{display:flex;flex-direction:column;gap:8px}
.item{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:10px 14px;display:flex;gap:12px;align-items:center;flex-wrap:wrap}
.item .main{flex:1;min-width:200px;display:flex;flex-direction:column;gap:3px}
.item .main a{color:var(--ink);text-decoration:none;font-weight:600}
.item .main a:hover{color:var(--accent)}
.item .sub{color:var(--muted);font-size:.82rem;display:flex;gap:8px;flex-wrap:wrap;align-items:center}
.item .acts{display:flex;gap:6px;flex-wrap:wrap}
.tabs{display:flex;gap:4px;border-bottom:1px solid var(--line);overflow-x:auto}
.tabs button{border:0;border-bottom:2px solid transparent;border-radius:0;background:none;padding:8px 12px;color:var(--muted);font-weight:500;white-space:nowrap}
.tabs button.on{color:var(--accent);border-bottom-color:var(--accent)}
.tabs .count{font-family:var(--mono);font-size:.75rem;background:var(--next-soft);color:var(--next);padding:0 6px;border-radius:999px;margin-left:4px}
.stats{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:10px}
.stat{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:12px 14px}
.stat b{display:block;font-size:1.5rem;font-variant-numeric:tabular-nums;line-height:1.2}
.stat span{color:var(--muted);font-size:.82rem}

/* ---------- hộp thoại, toast ---------- */
dialog{border:1px solid var(--line);border-radius:14px;background:var(--surface);color:var(--ink);padding:18px;max-width:min(460px,calc(100vw - 32px));width:100%}
dialog::backdrop{background:rgba(0,0,0,.45)}
dialog h2{margin-bottom:8px}
dialog .linkbox{display:flex;gap:6px}
dialog .linkbox input{flex:1;min-width:0;font-family:var(--mono);font-size:.82rem}
dialog form{display:flex;flex-direction:column;gap:12px}
#toast{position:fixed;left:50%;bottom:calc(24px + env(safe-area-inset-bottom,0px));transform:translateX(-50%) translateY(20px);background:var(--ink);color:var(--bg);padding:10px 16px;border-radius:10px;font-size:.9rem;opacity:0;pointer-events:none;transition:opacity .2s,transform .2s;z-index:50;max-width:calc(100vw - 32px)}
#toast.show{opacity:1;transform:translateX(-50%) translateY(0)}
#toast.err{background:var(--danger);color:#fff}

@media print{
  .topbar,.bottomnav,.player header .controls,.player header .p-panel,.p-actions,.player .dock{display:none!important}
  #app,#view,.player,.player .scroll{height:auto;overflow:visible;display:block}
  .player .scroll>.in{padding:0}
  .player .fl:not(.cur){opacity:1}
  .fl.on{background:none}
}