/* ======================================================================
   volume.css — the volume reader/trainer app (loaded by the 1..6 shells).
   Builds on common.css. Includes dark-mode overrides + mobile rules.
   ====================================================================== */

/* --- settings sidebar (right, always visible, foldable to a compact tab) --- */
#sidebar{position:fixed;top:0;right:0;bottom:0;width:260px;background:var(--card);border-left:1px solid var(--line);z-index:45;display:flex;flex-direction:column;box-shadow:-4px 0 18px rgba(0,0,0,.04);transition:width .22s ease;overflow:hidden}
body.side-collapsed #sidebar{width:0;border-left:0;box-shadow:none;overflow:visible}
body.side-collapsed #sidebar .side-body,body.side-collapsed #sidebar .side-foot{display:none}
#sideHead{display:flex;align-items:center;justify-content:space-between;padding:12px;border-bottom:1px solid var(--line);min-height:52px;gap:8px;white-space:nowrap}
#sideHead .st{font-size:14px;font-weight:700;white-space:nowrap;display:flex;align-items:center;gap:7px;min-width:0}
#sideHead .st .gear{font-size:16px}
#sideFold{border:0;background:var(--brand);color:#fff;border-radius:9px;min-width:32px;height:32px;cursor:pointer;font-size:16px;font-weight:700;line-height:1;display:flex;align-items:center;justify-content:center;flex:none;transition:transform .22s ease, background .15s}
#sideFold:hover{background:var(--brand2)}
body.side-collapsed #sideHead{justify-content:flex-start;padding:12px 0;border-bottom-color:transparent}
body.side-collapsed #sideHead .st{display:none}
body.side-collapsed #sideFold{position:fixed;right:14px;bottom:14px;z-index:45;width:38px;height:38px;min-width:38px;border-radius:12px;background:var(--card);color:var(--brand);border:1px solid var(--line);box-shadow:var(--shadow);transform:none;font-size:0}
body.side-collapsed #sideFold::before{content:"\2699";font-size:17px;line-height:1}
body.side-collapsed #sideFold:hover{transform:translateY(-1px);border-color:var(--brand2)}
.side-body{flex:1;overflow-y:auto;overflow-x:hidden;min-width:0;padding:14px}
.side-foot{padding:12px 14px;border-top:1px solid var(--line)}
.side-group{margin-bottom:18px}
.side-group label{display:block;margin-bottom:6px}
.side-row{display:flex;align-items:center;gap:8px;margin:6px 0}
.side-row input[type="range"]{flex:1;min-width:0}
.side-hint{font-size:11px;color:var(--muted);margin-top:4px;line-height:1.4}
#sidebar .seg{display:flex;width:100%}
#sidebar .seg button{flex:1;text-align:center;font-size:13px;padding:8px 6px}
#sidebar .seg button.wide{flex:1.4}
#sidebar select{width:100%;min-width:0;max-width:100%;font-size:13px;padding:7px 8px}
#sidebar .seg button{flex:1;text-align:center;font-size:13px;padding:8px 6px}
#sidebar .seg button.wide{flex:1.4}
.seg-num{display:inline-block;min-width:74px;color:var(--ink);font-size:13px}
.side-legend{display:flex;flex-direction:column;gap:5px;margin-top:2px;font-size:12px;color:var(--muted)}
.side-legend .sw{display:inline-block;border-radius:4px;padding:0 6px;font-size:12px;margin-right:4px}
/* scrim behind the open drawer; the settings panel is a pure overlay and
   never affects the primary layout */
body:not(.side-collapsed)::after{content:"";position:fixed;inset:0;z-index:44;background:rgba(20,22,32,.3)}

/* --- textbook --- */
.tb-lessons-panel{padding-top:6px;padding-bottom:8px}
.lesson-nav-toggle{display:block;width:100%;text-align:left;border:0;background:none;color:var(--brand);font-size:13px;font-weight:700;padding:8px 2px;cursor:pointer;min-height:auto;transition:.12s}
.lesson-nav-toggle:hover{color:var(--brand2)}
.tb-lessons-panel.collapsed .lesson-nav-toggle{color:var(--muted)}
.tb-lessons-panel.collapsed .lesson-nav{display:none}
.lesson-nav{display:flex;flex-wrap:wrap;gap:6px}
.lesson-nav button{border:1px solid var(--line);background:var(--card);border-radius:8px;padding:7px 12px;font-size:13px;cursor:pointer;color:var(--ink);transition:.12s}
.lesson-nav button.on{background:var(--brand);color:#fff;border-color:var(--brand)}
.lesson-nav button:hover:not(.on){border-color:var(--brand2);color:var(--brand)}
.tb-lesson-title{margin:0 0 4px;font-size:18px;font-weight:700}
.tb-section{margin-bottom:22px}
.tb-section h3{margin:0 0 8px;font-size:15px;font-weight:700;color:var(--brand);border-bottom:2px solid var(--line);padding-bottom:6px}
.tb-sec-h{display:flex;align-items:center;justify-content:space-between}
.btn-pinyin{font-size:12px;padding:4px 10px;font-weight:600;text-transform:none;letter-spacing:0;display:inline-flex;align-items:center;gap:4px}
.btn-pinyin b{color:var(--brand)}
ruby{font-weight:600}
rt{font-size:0.45em;font-weight:500;color:var(--muted)}
.tb-text{margin-bottom:18px;padding-bottom:14px;border-bottom:1px dashed var(--line)}
.tb-text:last-child{border-bottom:0;padding-bottom:0}
.tb-text-head{font-size:14px;font-weight:700;margin-bottom:8px;color:var(--brand);display:flex;align-items:center;gap:6px}
.tb-dialogue .line{margin-bottom:10px}
.tb-dialogue .line .zh{font-size:var(--hanzi);line-height:1.7}
.tb-dialogue .line .zh .spk{font-weight:600;color:var(--ink);font-size:80%}
.tb-dialogue .line .en{color:var(--muted);font-size:15px;line-height:1.6;margin-top:1px}
.tb-reading{font-size:var(--hanzi);line-height:1.7}
.tb-reading .en-line{color:var(--muted);font-size:15px;margin-top:6px}
.tb-vocab-table{width:100%;border-collapse:collapse}
.tb-vocab-table th{text-align:left;padding:6px 8px;border-bottom:2px solid var(--line);color:var(--muted);font-size:12px;text-transform:uppercase}
.tb-vocab-table td{padding:6px 8px;border-bottom:1px solid var(--line);vertical-align:middle}
.tb-vocab-table td.word{font-size:var(--hanzi);font-weight:600;white-space:nowrap}
.tb-vocab-table td .py{font-size:14px;color:var(--muted)}
.tb-vocab-table tr:hover{background:var(--hover)}
.tb-grammar-list,.tb-saying-list{margin:0;padding-left:22px}
.tb-grammar-list li,.tb-saying-list li{margin-bottom:6px;line-height:1.5}
.tb-text-vocab{border:1px dashed var(--line);border-radius:10px;padding:6px 12px;margin-bottom:12px;background:var(--hover)}
.tb-text-vocab-toggle{width:100%;text-align:left;border:0;background:none;cursor:pointer;padding:2px 0 4px;margin-bottom:2px;font:inherit}
.tb-text-vocab-title,.tb-text-vocab-toggle{font-size:12px;font-weight:700;color:var(--brand);text-transform:uppercase;letter-spacing:.4px}
.tb-text-vocab-toggle span{font-weight:400;color:var(--muted);text-transform:none;letter-spacing:0}
.tb-text-vocab-toggle::after{content:" \25be";color:var(--muted)}
.tb-text-vocab.collapsed .tb-text-vocab-toggle::after{content:" \25b8"}
.tb-text-vocab.collapsed .tb-vocab-table{display:none}
.tb-text-vocab .tb-vocab-table td.word{font-size:16px}
.tb-text-vocab .tb-vocab-table td{padding:4px 8px}
.tb-text-vocab .tb-vocab-table tr:last-child td{border-bottom:0}
.tb-saying .saying-zh{font-size:var(--hanzi);font-weight:700;margin-bottom:2px}
.tb-saying .saying-gloss{font-size:14px;color:var(--muted);margin-bottom:4px;font-style:italic}
.tb-saying .saying-en{font-size:15px;color:var(--muted)}
.lesson-pager{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}
.lesson-pager-info{font-size:13px;color:var(--muted)}

/* --- annotated reader (pinyin + hover + status) --- */
.tb-zh{font-size:var(--hanzi);line-height:2.2;word-break:break-word}
.tb-line{margin-bottom:12px}
.tb-line .spk{font-weight:600;color:var(--ink);font-size:75%}
.tb-trans{color:var(--muted);font-size:15px;line-height:1.6;margin-top:1px}
#tbContent.tb-hide-en .tb-trans,#tbContent.tb-hide-en .saying-en{display:none}
.tb-zh .tok{position:relative;display:inline-block;cursor:help;border-radius:5px;padding:0 1px;transition:background .12s}
.tb-zh .tok:hover{background:rgba(123,111,240,.12)}
.tb-zh .tok ruby{unicode-bidi:isolate}
.tb-zh .tok rt{font-size:0.38em;font-weight:500;color:var(--muted);letter-spacing:0}
.tb-zh .tok.speakable{cursor:pointer}
/* textbook read-aloud: green plays a recording, amber falls back to TTS */
.tb-zh .speak.clip{color:#2f9e5f}
.tb-zh .speak.ttsf{color:#b08a5a}
.tb-zh.no-py rt{display:none}
.tb-zh .tok.new{background:#d9e7ff;color:#1d4ed8}
.tb-zh .tok.prev{background:rgba(107,114,128,.12);color:#4b5563}
.tb-zh .tok.fut{background:#ffe8cc;color:#b45309}
.wb-zh .tok{position:relative;display:inline-block;cursor:help;border-radius:5px;padding:0 1px;transition:background .12s}
.wb-zh .tok:hover{background:rgba(123,111,240,.12)}
.wb-zh .tok ruby{unicode-bidi:isolate}
.wb-zh .tok rt{font-size:0.38em;font-weight:500;color:var(--muted);letter-spacing:0}
.wb-zh.no-py rt{display:none}
.wb-zh .tok.new{background:#d9e7ff;color:#1d4ed8}
.wb-zh .tok.prev{background:rgba(107,114,128,.12);color:#4b5563}
.wb-zh .tok.fut{background:#ffe8cc;color:#b45309}
.tb-status-legend{display:none;flex-wrap:wrap;gap:12px;margin:0 0 10px;font-size:12px;color:var(--muted)}
.tb-status-legend.on{display:flex}
.tb-status-legend .sw{display:inline-block;border-radius:4px;padding:0 6px;font-size:12px}
.sw.new{background:#d9e7ff;color:#1d4ed8}
.sw.prev{background:rgba(107,114,128,.12);color:#4b5563}
.sw.fut{background:#ffe8cc;color:#b45309}
.btn-status{margin-left:8px}
.leg-level{display:inline-block;font-size:10px;background:#eef0f7;color:var(--muted);border-radius:4px;padding:0 4px;margin-left:2px}

/* --- tooltip --- */
#tip{position:fixed;z-index:50;max-width:320px;background:#1f2430;color:#fff;border-radius:8px;padding:7px 10px;font-size:12px;line-height:1.5;box-shadow:0 6px 20px rgba(0,0,0,.28);pointer-events:auto;display:none}
#tip .t-word{font-size:17px;font-weight:700}
#tip .t-py{color:#b9c2ff;margin-left:6px;font-weight:500;font-size:13px}
#tip .t-gloss{color:#e8eaf2;margin-top:2px}
#tip .t-stat{margin-top:5px;padding-top:5px;border-top:1px solid rgba(255,255,255,.15);font-size:11px;color:#cbd2e0}
#tip .t-stat b{color:#fff}

/* --- total vocabulary tab --- */
#vocabWrap{margin-bottom:10px}
#vocabSearch{width:100%;padding:9px 12px;border:1px solid var(--line);border-radius:8px;font-size:15px}
#vocabMeta{font-size:13px;color:var(--muted);margin:8px 0}
.tv-cols{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin:8px 0 12px}
.tv-cols-label{font-size:12px;font-weight:600;color:var(--muted);text-transform:uppercase;letter-spacing:.03em}
.tv-cols .seg button{font-size:13px;padding:7px 12px}
.tv-groups{display:block}
.tv-table{width:100%;border-collapse:collapse;font-size:14px}
.tv-table th{text-align:left;padding:7px 10px;border-bottom:2px solid var(--line);color:var(--muted);font-size:11px;text-transform:uppercase;letter-spacing:.04em;white-space:nowrap}
.tv-table td{padding:8px 10px;border-bottom:1px solid var(--line);vertical-align:middle}
.tv-table tbody tr:hover{background:var(--hover)}
.tv-table tbody tr:last-child td{border-bottom:0}
.tv-word{font-weight:600;font-size:var(--hanzi);white-space:nowrap}
.tv-meaning{text-align:right;min-width:140px}
.tv-py{font-size:13px;color:var(--muted);white-space:nowrap}
.tv-first{font-size:12px;color:var(--muted);white-space:nowrap}
.tv-lv{font-size:11px;font-weight:700;background:#eef0f7;border-radius:5px;padding:2px 7px;color:var(--muted);white-space:nowrap;text-align:center}
.tv-group-title{font-weight:700;margin:14px 0 4px;color:var(--brand);border-bottom:1px solid var(--line);padding-bottom:4px}
.tv-group-title:first-child{margin-top:0}
/* toggleable columns (hidden when the container has the matching class) */
.tv-groups.no-py .tv-py,.tv-groups.no-py th[data-c="py"]{display:none}
.tv-groups.no-me .tv-meaning,.tv-groups.no-me th[data-c="me"]{display:none}
.tv-groups.no-fi .tv-first,.tv-groups.no-fi th[data-c="fi"]{display:none}
.tv-groups.no-lv .tv-lv,.tv-groups.no-lv th[data-c="lv"]{display:none}

/* ---- workbook tab ---- */
#tabWb .wb-nav{margin-bottom:0}
#tabWb .wb-lesson-title{margin:2px 0 14px;font-size:19px;color:var(--brand)}
.wb-block-head{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:12px}
.wb-block-head h3{margin:0}
.wb-block-head .speak{white-space:nowrap}
.wb-q{position:relative;border:1px solid var(--line);border-left:3px solid var(--brand);border-radius:10px;padding:10px 12px 10px 44px;margin-bottom:10px;background:var(--card)}
.wb-qn{position:absolute;left:10px;top:9px;display:inline-block;min-width:24px;padding:0 6px;height:24px;line-height:24px;text-align:center;border-radius:12px;background:var(--brand);color:#fff;font-size:12px;font-weight:700}
.wb-hd{margin:-2px 0 5px}
.wb-hd div{font-size:11.5px;color:var(--muted);line-height:1.45}
.wb-hd div+div{margin-top:1px}
.wb-line{padding:2px 0;word-wrap:break-word;overflow-wrap:break-word}
.wb-spk{display:inline-block;min-width:26px;color:var(--brand);font-weight:700;margin-right:6px}
.wb-star{margin-top:4px;color:var(--warn);font-weight:600}
.wb-star span{font-weight:400}
.wb-qline{margin-top:3px;color:var(--muted);font-style:italic}
.wb-qnum{font-style:normal;font-weight:700;margin-right:3px}
.wb-voice{position:absolute;right:8px;top:6px}
.wb-voice .speak{font-size:14px}
.wb-anssec{border:1px solid var(--line);border-radius:10px;margin-top:10px;overflow:hidden}
.wb-anshead{display:flex;align-items:center;justify-content:space-between;padding:8px 12px;background:var(--card)}
.wb-ansname{font-weight:700;color:var(--brand)}
.wb-anshead .btn{padding:6px 12px;font-size:13px}
.wb-ans{padding:4px 12px 10px}
.wb-ansrow{display:flex;gap:10px;padding:4px 0;border-bottom:1px dashed var(--line)}
.wb-ansrow:last-child{border-bottom:0}
.wb-nums{flex:0 0 auto;min-width:46px;font-weight:700;color:var(--muted);font-size:13px}
.wb-atext{flex:1 1 auto;min-width:0}

/* default visible tab */
[data-tabpage]{display:none}
[data-tabpage].on{display:block}

/* ---- dark overrides (volume-specific bits with inline colors) ---- */
:root[data-theme="dark"] .tv-lv{
  background:rgba(236,238,244,.12); color:var(--muted)
}
:root[data-theme="dark"] .tb-zh .tok.new, :root[data-theme="dark"] .sw.new,
:root[data-theme="dark"] .wb-zh .tok.new{
  background:rgba(90,112,255,.42); color:#cdd5ff
}
:root[data-theme="dark"] .tb-zh .tok.prev, :root[data-theme="dark"] .sw.prev,
:root[data-theme="dark"] .wb-zh .tok.prev{
  background:rgba(152,160,178,.2); color:#c6ccda
}
:root[data-theme="dark"] .tb-zh .tok.fut, :root[data-theme="dark"] .sw.fut,
:root[data-theme="dark"] .wb-zh .tok.fut{
  background:rgba(224,161,68,.35); color:#f2cd93
}
:root[data-theme="dark"] .leg-level{background:rgba(236,238,244,.12); color:var(--muted)}

/* ---- mobile: sidebar becomes an overlay drawer, contents wrap better ---- */
@media(max-width:640px){
  body.side-collapsed #sideFold{width:44px;height:44px;min-width:44px}
  body:not(.side-collapsed) #sidebar{width:min(300px,88vw);box-shadow:-8px 0 26px rgba(0,0,0,.35)}
  .lesson-nav button{flex:1 1 40%}
  .tv-cols .seg{width:auto;flex-wrap:wrap}
  .tv-cols .seg button{flex:1 1 auto;padding:7px 10px}
  .tv-table thead{display:none}
  .tv-table tbody{display:block;width:100%}
  .tv-table tr{display:flex;flex-wrap:wrap;align-items:baseline;gap:3px 10px;padding:6px 2px}
  .tv-table td{display:inline-block;border-bottom:0;padding:1px 0}
  .tv-word{font-size:22px}
  .tv-meaning{flex:1 1 100%;order:2;text-align:left}
  .tv-py{order:3}
  .tv-lv{order:4;margin-left:auto}
  .tv-first{order:5}
  .tb-vocab-table{table-layout:fixed}
  .tb-vocab-table td.word,.tb-vocab-table td .py{white-space:normal}
  .tb-vocab-table th:nth-child(1),.tb-vocab-table td:nth-child(1){width:22%}
  .tb-vocab-table th:nth-child(2),.tb-vocab-table td:nth-child(2){width:26%}
  .tb-vocab-table th:nth-child(4),.tb-vocab-table td:nth-child(4){width:16%}
}
@media(max-width:600px){
  .tb-zh{line-height:2.4}
}