:root{
  --ink:#2B2540; --muted:#5E5872; --ground:#F6F2FF; --card:#FFFFFF; --line:#E9DFFA; --line2:#D9CFE0;
  --pink:#C73E6E; --pink-soft:#FDE7EF; --pink-line:#F3B6CB; --purple:#7A3FA0; --purple-soft:#EFE6FA;
  --ok:#2F8F5B; --okbg:#E9F7EF; --okink:#1E6B43; --bad:#C23A3A; --badbg:#FDEEEE; --badink:#A62B2B;
  --key:#0F6B5C; --keybg:#E2F5F1;
  --radius:22px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:90px}
body{margin:0;background:var(--ground);color:var(--ink);font-family:Arial,Helvetica,sans-serif;font-size:19px;line-height:1.5;overflow-x:hidden}
img{max-width:100%;display:block}
button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit}
button{cursor:pointer}
button:disabled{cursor:default}
:focus-visible{outline:3px solid var(--purple);outline-offset:2px}
[hidden]{display:none !important}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;padding:8px 20px;border-radius:999px;font-weight:700;font-size:17px;border:2px solid transparent;text-decoration:none;white-space:nowrap}
.btn-sm{min-height:40px;padding:6px 16px;font-size:16px}
.btn-xs{min-height:34px;padding:4px 12px;font-size:14px}
.btn-primary{background:var(--pink);color:#fff}
.btn-primary:hover{background:#B13361}
.btn-primary:disabled{background:#EDE6F3;color:#6E6880}
.btn-outline{border-color:var(--purple);background:#fff;color:var(--purple)}
.btn-ghost{border-color:var(--line2);background:var(--ground);color:var(--ink)}
.btn-ghost:hover{background:#EEE6FA}
.icon-btn{width:40px;height:40px;border-radius:12px;border:none;background:transparent;display:inline-flex;align-items:center;justify-content:center;font-size:18px;color:var(--muted)}
.icon-btn:hover{background:var(--ground);color:var(--ink)}

/* ---------- top bar ---------- */
.topbar{position:sticky;top:0;z-index:40;background:rgba(255,255,255,.94);backdrop-filter:blur(6px);border-bottom:2px solid var(--line)}
.topbar-in{max-width:1500px;margin:0 auto;padding:10px 16px;display:flex;align-items:center;gap:16px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink)}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text b{font-size:20px}.brand-text small{font-size:13px;color:var(--muted)}
.testnav{display:flex;gap:8px;flex-wrap:wrap;flex:1 1 auto}
.testnav button{border:2px solid var(--line);background:#fff;border-radius:999px;padding:6px 16px;font-weight:700;font-size:16px;min-height:40px}
.testnav button.active{background:var(--purple);border-color:var(--purple);color:#fff}
.testnav button:disabled{opacity:.55}
.top-actions{display:flex;gap:8px;align-items:center;margin-left:auto}
.mode-badge{background:var(--keybg);color:var(--key);font-weight:700;font-size:14px;border-radius:999px;padding:6px 12px}

/* ---------- layout ---------- */
.layout{max-width:1500px;margin:0 auto;padding:20px 16px 80px;display:flex;gap:24px;align-items:flex-start}
.main{flex:1 1 auto;min-width:0;max-width:960px;margin:0 auto;display:flex;flex-direction:column;gap:22px}
body.teacher .main{margin:0}
.foot{text-align:center;color:var(--muted);font-size:15px}

.sectabs{display:flex;gap:10px;flex-wrap:wrap}
.sectab{flex:1 1 220px;border:3px solid var(--line);background:#fff;border-radius:18px;padding:12px 18px;font-weight:700;font-size:20px;text-align:left;display:flex;justify-content:space-between;align-items:center;gap:12px;min-height:60px}
.sectab small{font-weight:400;color:var(--muted);font-size:15px}
.sectab.active{border-color:var(--pink);background:var(--pink-soft);color:#8E2550}

.scorebar{background:#fff;border:3px solid var(--line);border-radius:var(--radius);padding:14px 20px;display:flex;flex-wrap:wrap;align-items:center;gap:10px 18px}
.scorebar .total{font-size:22px;font-weight:700}
.scorebar .total em{font-style:normal;color:var(--pink)}
.chips{display:flex;flex-wrap:wrap;gap:8px;flex:1 1 300px}
.chip{display:inline-flex;align-items:center;gap:6px;min-height:40px;padding:4px 12px;border-radius:12px;border:2px solid var(--line);background:var(--ground);color:#5B2E86;font-weight:700;font-size:15px;text-decoration:none}
.chip.done{background:var(--pink-soft);border-color:var(--pink-line);color:#8E2550}

/* ---------- part card ---------- */
.part{background:#fff;border:3px solid var(--line);border-radius:28px;padding:24px;display:flex;flex-direction:column;gap:18px}
.part-head{display:flex;gap:14px;align-items:flex-start;flex-wrap:wrap}
.part-badge{position:relative;flex:0 0 auto;width:64px;height:64px;border-radius:20px;display:flex;align-items:center;justify-content:center;background:linear-gradient(145deg,#EEF4FF,#DCE8FF);border:2px solid #C9DAFF;box-shadow:0 3px 0 #C9DAFF}
.part-badge img{width:44px;height:44px;object-fit:contain;image-rendering:pixelated}
.pb-reading{background:linear-gradient(145deg,#EAF8EF,#D3F0DD);border-color:#B5E3C4;box-shadow:0 3px 0 #B5E3C4}
.pb-speaking{background:linear-gradient(145deg,#FFF0F6,#FFDDEB);border-color:#F7C0D6;box-shadow:0 3px 0 #F7C0D6}
.pb-num{position:absolute;right:-8px;bottom:-8px;min-width:28px;height:28px;padding:0 6px;border-radius:999px;background:var(--purple);color:#fff;font-weight:800;font-size:15px;display:flex;align-items:center;justify-content:center;border:3px solid #fff;box-shadow:0 2px 4px rgba(91,46,134,.25)}
.part-title{flex:1 1 300px;min-width:0}
.part-title h2{margin:0;font-size:26px;line-height:1.2}
.part-title .count{color:var(--muted);font-size:15px}
.instr{margin:4px 0 0;font-weight:700;font-size:19px}
.help{margin:0;font-size:15px;color:var(--muted);background:#F1F6FF;border-radius:12px;padding:8px 12px}
.audio{display:flex;flex-direction:column;gap:6px;background:#FFF4EC;border:2px dashed #F2C3A4;border-radius:16px;padding:12px 14px}
.audio audio{width:100%}
.audio .missing{font-size:15px;color:#8A4A22}
.transcript{border:2px solid var(--keybg);border-radius:16px;background:#F7FCFB}
.transcript summary{cursor:pointer;padding:10px 14px;font-weight:700;color:var(--key);font-size:16px}
.transcript .tr-body{padding:0 16px 14px;font-size:16px;line-height:1.55;max-height:420px;overflow:auto}
.transcript p{margin:4px 0}
.transcript .sp{display:inline-block;min-width:62px;font-weight:700;color:var(--muted);font-size:13px;text-transform:uppercase;letter-spacing:.04em}
.transcript .narr{font-style:italic;color:var(--muted)}

.part-foot{display:flex;flex-wrap:wrap;gap:12px;align-items:center}
.result{width:100%;border-radius:20px;padding:14px 18px;display:flex;flex-wrap:wrap;align-items:center;gap:10px 18px;background:#FDF0F5;border:2px solid var(--pink-line);animation:rise .35s ease-out both}
.result .score{font-size:28px;font-weight:700;color:#A1335A}
.result .detail{font-size:16px;color:var(--muted)}
.trail{display:flex;gap:4px;align-items:flex-end}
.trail svg{opacity:0;animation:stepIn .35s ease-out forwards}
.trail svg:nth-child(even){margin-bottom:10px}
.trail svg:nth-child(1){animation-delay:.05s}.trail svg:nth-child(2){animation-delay:.2s}.trail svg:nth-child(3){animation-delay:.35s}.trail svg:nth-child(4){animation-delay:.5s}.trail svg:nth-child(5){animation-delay:.65s}

/* ---------- question elements ---------- */
.pimg{border-radius:16px;border:2px solid var(--line);margin:0 auto}
.qline{display:flex;flex-wrap:wrap;align-items:center;gap:8px 10px;padding:10px 12px;border-radius:16px;background:#FBF9FE}
.qline.example{background:#FFFBEA}
.qline.right,.qrow.right{background:#F1FAF5}
.qline.wrong,.qrow.wrong{background:#FFF5F5}
.num{flex:0 0 auto;width:34px;height:34px;border-radius:50%;background:var(--purple-soft);color:var(--purple);font-weight:700;font-size:16px;display:inline-flex;align-items:center;justify-content:center}
.num.ex{width:auto;padding:0 10px;border-radius:10px;font-size:13px;background:#FFF1B8;color:#6E5600}
.gap{height:44px;min-width:120px;width:170px;max-width:100%;padding:4px 12px;border-radius:12px;border:2px solid #CFC3DD;background:#fff;font-size:19px}
.gap.m{width:210px}.gap.l{width:280px}
.gap:focus{outline:3px solid var(--pink-line);outline-offset:1px;border-color:var(--pink)}
.gap.right{border-color:var(--ok);background:var(--okbg);color:var(--okink)}
.gap.wrong{border-color:var(--bad);background:var(--badbg);color:var(--badink)}
.exans{display:inline-block;min-width:110px;padding:2px 12px;border-bottom:2px dotted #B9A9CF;font-family:'Comic Sans MS','Comic Neue',Arial,sans-serif;color:#4A3F66}
.keytag{display:inline-flex;align-items:center;gap:4px;font-size:14px;font-weight:700;color:var(--key);background:var(--keybg);border-radius:999px;padding:2px 10px}
.keytag::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--key)}
.fixtag{display:inline-block;font-size:14px;font-weight:700;color:#8E2424;background:var(--badbg);border-radius:999px;padding:2px 10px}
.mark{flex:0 0 auto;width:30px;height:30px;margin-left:auto}

.pills{display:inline-flex;flex-wrap:wrap;gap:6px}
.pill{min-height:42px;padding:4px 14px;border-radius:999px;border:2px solid #CFC3DD;background:#fff;font-size:18px}
.pill:hover:not(:disabled){border-color:var(--pink-line)}
.pill.sel{border-color:var(--pink);background:var(--pink-soft);color:#8E2550;font-weight:700}
.pill.c-right{border-color:var(--ok);background:var(--ok);color:#fff;font-weight:700}
.pill.c-wrong{border-color:var(--bad);background:var(--badbg);color:var(--badink);text-decoration:line-through}
.pill.c-key{box-shadow:0 0 0 3px var(--keybg);border-style:dashed;border-color:var(--key)}
.pill:disabled{opacity:1}
select.gap{width:auto;min-width:90px;padding-right:8px}

.wordbox{border:2px dashed #CDB9EA;border-radius:18px;padding:12px 14px;display:flex;flex-wrap:wrap;gap:8px;background:#FBF8FF}
.wordbox .wb-title{width:100%;font-weight:700;font-size:15px;color:var(--muted)}
.wordbox span{background:#fff;border:2px solid var(--line);border-radius:999px;padding:3px 14px;font-size:17px}
.wordbox span.used{text-decoration:line-through;color:var(--muted)}

/* form (L2) */
.form{border:2px solid var(--ink);border-radius:14px;padding:16px 18px;display:flex;flex-direction:column;gap:12px;max-width:640px;width:100%;margin:0 auto;background:#fff}
.form h3{margin:0 0 4px;text-align:center;font-weight:400;letter-spacing:.06em;font-size:19px}
.frow{display:grid;grid-template-columns:34px minmax(120px,190px) 1fr;align-items:center;gap:10px;border-radius:12px;padding:4px}
.frow .fin{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.frow.right{background:#F1FAF5}.frow.wrong{background:#FFF5F5}

/* letters (L3) */
.lrows{display:flex;flex-direction:column;gap:10px}
.lrow{display:flex;align-items:center;gap:12px;flex-wrap:wrap;padding:6px 10px;border-radius:16px;background:#FBF9FE}
.lrow img{width:54px;height:84px;object-fit:contain}
.lrow .who{min-width:70px;font-weight:700}
.lpills .pill{width:44px;padding:0;font-weight:700}
.lbox{width:46px;height:46px;border:2px solid var(--ink);border-radius:8px;display:inline-flex;align-items:center;justify-content:center;font-family:'Comic Sans MS',Arial,sans-serif;font-size:22px}
.tiles{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}
.tile{display:flex;flex-direction:column;align-items:center;gap:4px;font-weight:700;font-size:20px}
.tile img{border-radius:10px;border:2px solid var(--line);width:100%;aspect-ratio:4/3;object-fit:cover}

/* pics (L4) */
.pq{display:flex;flex-direction:column;gap:8px;padding:10px 12px;border-radius:18px;background:#FBF9FE}
.pq.right{background:#F1FAF5}.pq.wrong{background:#FFF5F5}.pq.example{background:#FFFBEA}
.pq-head{display:flex;align-items:center;gap:10px;font-size:19px}
.pq-opts{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
.popt{border:3px solid var(--line);border-radius:16px;background:#fff;padding:6px;display:flex;flex-direction:column;align-items:center;gap:6px;position:relative}
.popt img{border-radius:10px;width:100%;aspect-ratio:1/1;object-fit:cover}
.popt .tickbox{width:36px;height:36px;border:2px solid var(--ink);border-radius:6px;display:flex;align-items:center;justify-content:center;font-weight:700}
.popt .lab{display:flex;align-items:center;gap:8px;font-weight:700;font-size:20px}
.popt.sel{border-color:var(--pink);background:var(--pink-soft)}
.popt.c-right{border-color:var(--ok);background:var(--okbg)}
.popt.c-wrong{border-color:var(--bad);background:var(--badbg)}
.popt.c-key{outline:4px dashed var(--key);outline-offset:-2px}

/* yes/no */
.qrow{display:flex;align-items:center;gap:10px;flex-wrap:wrap;padding:10px 12px;border-radius:16px;background:#FBF9FE}
.qrow .txt{flex:1 1 280px}
.qrow.example{background:#FFFBEA}

/* dialog (R3) */
.optlist{border:2px solid var(--ink);border-radius:14px;padding:10px 16px;margin:0;list-style:none;display:flex;flex-direction:column;gap:6px;background:#fff}
.optlist li{display:flex;gap:12px}
.optlist b{min-width:20px}
.dlg{display:grid;grid-template-columns:auto max-content 1fr auto;gap:6px 10px;align-items:center;padding:10px 12px;border-radius:16px;background:#FBF9FE}
.dlg.example{background:#FFFBEA}
.dlg.right{background:#F1FAF5}.dlg.wrong{background:#FFF5F5}
.dlg .sp{font-weight:700}
.dlg .ans-cell{display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.dlg-end{margin:0;padding:0 12px}

/* story (R4) */
.storybox{line-height:2.4;font-size:19px;padding:6px 4px}
.storybox .gapwrap{display:inline-flex;align-items:center;gap:6px;vertical-align:middle;line-height:1.2}
.storybox .gnum{font-weight:700}
.story-title{text-align:center;margin:0;font-size:22px;text-decoration:underline}
.story p{margin:0 0 12px}

/* draw lines (L1) */
.lines-wrap{position:relative;max-width:640px;width:100%;margin:0 auto;user-select:none;-webkit-user-select:none;touch-action:manipulation}
.lines-wrap img{width:100%;border-radius:12px;border:2px solid var(--line)}
.lines-wrap svg.ov{position:absolute;inset:0;width:100%;height:100%;pointer-events:none}
.nm{position:absolute;transform:translate(-50%,-50%);min-height:38px;min-width:64px;padding:2px 10px;border-radius:999px;border:2px solid var(--purple);background:rgba(255,255,255,.92);font-weight:700;font-size:16px;color:var(--purple)}
.nm.active{background:var(--purple);color:#fff;box-shadow:0 0 0 4px rgba(122,63,160,.25)}
.nm.done{border-color:var(--pink);color:#8E2550}
.nm.example{border-style:dashed;cursor:default}
.nm.right{border-color:var(--ok);background:var(--okbg);color:var(--okink)}
.nm.wrong{border-color:var(--bad);background:var(--badbg);color:var(--badink)}
.hot{position:absolute;border-radius:14px;border:2px dashed transparent;background:transparent;padding:0}
.lines-wrap.picking .hot{border-color:rgba(199,62,110,.55);background:rgba(253,231,239,.25)}
.lines-wrap.picking .hot:hover{background:rgba(253,231,239,.5)}
.lines-legend{display:flex;flex-direction:column;gap:6px;font-size:16px}

/* colour (L5) */
.colour{display:flex;flex-direction:column;gap:10px;align-items:center}
.ctools{display:flex;flex-wrap:wrap;gap:8px;align-items:center;justify-content:center}
.swatch{width:42px;height:42px;border-radius:50%;border:3px solid #fff;box-shadow:0 0 0 2px var(--line2)}
.swatch.sel{box-shadow:0 0 0 3px var(--ink)}
.tool{min-height:42px;padding:4px 14px;border-radius:12px;border:2px solid var(--line2);background:#fff;font-weight:700;font-size:15px}
.tool.sel{border-color:var(--purple);background:var(--purple-soft);color:var(--purple)}
.cstage{position:relative;width:100%;max-width:600px;border:2px solid var(--line);border-radius:12px;overflow:hidden;background:#fff;touch-action:none}
.cstage canvas{display:block;width:100%;height:auto}
.cstage img.lineart{position:absolute;inset:0;width:100%;height:100%;mix-blend-mode:multiply;pointer-events:none}
.cstage canvas.paint{cursor:crosshair}
.cchecks{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:6px;width:100%;max-width:600px}
.cchecks li{display:flex;gap:10px;align-items:center;padding:8px 12px;border-radius:12px;background:#FBF9FE;font-size:16px}
.cchecks li.right{background:#F1FAF5}.cchecks li.wrong{background:#FFF5F5}

/* ---------- board ---------- */
.board{flex:0 0 420px;position:sticky;top:84px;max-height:calc(100vh - 100px);display:flex;flex-direction:column;background:#fff;border:3px solid var(--keybg);border-radius:24px;overflow:hidden}
.board-head{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:12px 14px 8px;position:relative;flex-wrap:wrap}
.board-head h2{margin:0;font-size:22px;color:var(--key)}
.board-head-actions{display:flex;gap:6px}
.board-close{display:none}
.board-menu{position:absolute;right:12px;top:52px;z-index:5;background:#fff;border:2px solid var(--line);border-radius:14px;box-shadow:0 12px 30px rgba(43,37,64,.15);display:flex;flex-direction:column;padding:6px;min-width:220px}
.board-menu button{border:none;background:none;text-align:left;padding:10px 12px;border-radius:10px;font-size:15px}
.board-menu button:hover{background:var(--ground)}
.board-menu .danger{color:var(--bad)}
.board-tabs{display:flex;gap:6px;padding:0 14px}
.btab{flex:1;border:2px solid var(--line);background:#fff;border-radius:12px 12px 0 0;border-bottom:none;padding:8px;font-weight:700;font-size:16px;min-height:42px}
.btab.active{background:var(--keybg);border-color:var(--keybg);color:var(--key)}
.board-body{flex:1 1 auto;overflow:auto;padding:12px 14px 16px;border-top:2px solid var(--keybg)}
.bpanel{display:flex;flex-direction:column;gap:10px}
.lookup{display:flex;gap:8px}
.lookup input{flex:1;min-width:0;height:42px;border:2px solid var(--line2);border-radius:12px;padding:4px 12px;font-size:17px}
.hint{margin:0;font-size:14px;color:var(--muted)}
.vocab-list,.grammar-list{display:flex;flex-direction:column;gap:10px}
.vcard,.gcard{border:2px solid var(--line);border-radius:16px;padding:10px 12px;display:flex;flex-direction:column;gap:6px;background:#FDFCFF}
.vcard-head{display:flex;align-items:baseline;gap:8px;flex-wrap:wrap}
.vcard-head .w{font-size:21px;font-weight:700;color:var(--ink);border:none;background:transparent;padding:0;min-width:60px;max-width:100%}
.vcard .ipa{color:var(--muted);font-size:15px}
.vcard .pos{font-size:13px;font-weight:700;color:#fff;background:var(--purple);border-radius:999px;padding:1px 8px}
.vcard .vi{font-weight:700;color:var(--key)}
.vcard .ex{font-style:italic;color:#4A3F66}
.vcard .card-actions,.gcard .card-actions{display:flex;gap:4px;margin-left:auto}
.ed{border:1px solid transparent;border-radius:8px;padding:2px 6px;min-height:28px;outline:none;font-size:16px;white-space:pre-wrap;word-break:break-word}
.ed:hover{border-color:var(--line)}
.ed:focus{border-color:var(--pink-line);background:#fff}
.ed:empty::before{content:attr(data-ph);color:#A49DB5}
.gcard .gt{font-weight:700;font-size:18px;color:var(--key)}
.gcard .gb{font-size:16px;min-height:60px}
.add-row{align-self:flex-start}
.board-fab{position:fixed;right:16px;bottom:16px;z-index:45;min-height:52px;padding:8px 20px;border-radius:999px;border:none;background:var(--key);color:#fff;font-weight:700;font-size:17px;box-shadow:0 8px 20px rgba(15,107,92,.35)}

/* ---------- dictionary popup ---------- */
.dict{position:fixed;z-index:60;width:min(420px,calc(100vw - 24px));max-height:min(560px,calc(100vh - 24px));display:flex;flex-direction:column;background:#fff;border:2px solid var(--line);border-radius:20px;box-shadow:0 18px 50px rgba(43,37,64,.22)}
.dict-head{display:flex;justify-content:space-between;align-items:center;gap:8px;padding:12px 14px 6px}
.dict-word{font-size:24px}
.dict-ipa{color:var(--muted);font-size:15px}
.dict-head-actions{display:flex;gap:2px}
.dict-body{overflow:auto;padding:4px 16px 10px;font-size:16px;display:flex;flex-direction:column;gap:10px}
.dict-body .src{font-size:12px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--muted)}
.dict-body .ai{background:var(--keybg);border-radius:14px;padding:10px 12px;display:flex;flex-direction:column;gap:6px}
.dict-body .ai .vi{font-size:18px;font-weight:700;color:var(--key)}
.dict-body .mean{display:flex;flex-direction:column;gap:4px}
.dict-body .mean .pos{font-weight:700;color:var(--purple)}
.dict-body ol{margin:0;padding-left:20px}
.dict-body li{margin-bottom:4px}
.dict-body .ex{font-style:italic;color:#4A3F66}
.dict-body .muted{color:var(--muted)}
.dict-body label.pick{display:flex;gap:8px;align-items:flex-start;cursor:pointer}
.dict-body label.pick input{margin-top:5px}
.dict-foot{display:flex;flex-wrap:wrap;gap:8px;padding:10px 14px 14px;border-top:2px solid var(--ground)}
.spinner{width:22px;height:22px;border:3px solid var(--line);border-top-color:var(--pink);border-radius:50%;animation:spin .8s linear infinite;display:inline-block;vertical-align:middle}
@keyframes spin{to{transform:rotate(360deg)}}
body.teacher .main [data-dict]{cursor:help}

/* ---------- modals ---------- */
.modal{position:fixed;inset:0;z-index:70;background:rgba(43,37,64,.4);display:flex;align-items:center;justify-content:center;padding:16px}
.modal-card{background:#fff;border-radius:24px;padding:24px;width:min(480px,100%);max-height:calc(100vh - 32px);overflow:auto;display:flex;flex-direction:column;gap:10px}
.modal-card h2{margin:0 0 6px;font-size:24px}
.modal-card h3{margin:4px 0 0;font-size:18px}
.modal-card label{font-weight:700;font-size:16px}
.modal-card input[type=password],.modal-card input[type=text]{height:46px;border:2px solid var(--line2);border-radius:12px;padding:4px 12px}
.modal-card .check{display:flex;gap:10px;align-items:center;font-weight:400}
.modal-card .check input{width:20px;height:20px}
.modal-card hr{border:none;border-top:2px solid var(--ground);width:100%}
.modal-actions{display:flex;gap:8px;justify-content:flex-end;flex-wrap:wrap;margin-top:8px}
.err{color:var(--bad);margin:0;font-size:15px}

/* ---------- present ---------- */
.present{position:fixed;inset:0;z-index:80;background:#FFFDF7;overflow:auto;padding:40px 5vw}
.present-close{position:fixed;top:16px;right:16px}
.present-in{max-width:1300px;margin:0 auto;display:grid;grid-template-columns:repeat(auto-fit,minmax(380px,1fr));gap:24px;font-size:26px}
.present-in h2{grid-column:1/-1;margin:0;font-size:40px;color:var(--key)}
.present-in .pcard{border:3px solid var(--line);border-radius:24px;padding:20px 24px;background:#fff}
.present-in .pcard .w{font-size:40px;font-weight:700}
.present-in .pcard .ipa{color:var(--muted);font-size:24px}
.present-in .pcard .vi{color:var(--key);font-weight:700}
.present-in .pcard .ex{font-style:italic}
.present-in .pcard.g .gt{font-size:32px;font-weight:700;color:var(--key)}
.present-in .pcard.g .gb{white-space:pre-wrap}

/* ---------- paws & animation ---------- */
.paw{position:fixed;pointer-events:none;z-index:90}
.paw svg{display:block;width:100%;height:100%;animation:pawPop 1.1s ease-out both}
@keyframes pawPop{0%{opacity:0;transform:scale(.2)}22%{opacity:.95;transform:scale(1.15)}40%{transform:scale(1)}75%{opacity:.85}100%{opacity:0;transform:scale(.9) translateY(-6px)}}
@keyframes stepIn{from{opacity:0;transform:translateY(6px) scale(.6)}to{opacity:1;transform:rotate(90deg)}}
@keyframes rise{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
.cat-bob{animation:bob 2.6s ease-in-out infinite;transform-origin:50% 90%;flex:0 0 auto}
@keyframes bob{0%,100%{transform:rotate(-4deg)}50%{transform:rotate(4deg) translateY(-2px)}}
.stamp{animation:stamp .4s cubic-bezier(.3,1.6,.5,1) both}
@keyframes stamp{from{opacity:0;transform:scale(1.8) rotate(-20deg)}to{opacity:1;transform:none}}

/* ---------- responsive ---------- */
@media (max-width:720px){
  .board{position:fixed;inset:0;z-index:65;max-height:none;border-radius:0;border:none}
  .board-close{display:inline-flex}
  body.teacher .main{margin:0 auto}
}
@media (max-width:640px){
  body{font-size:17px}
  .part{padding:18px 14px;border-radius:22px}
  .part-title h2{font-size:22px}
  .tiles{grid-template-columns:repeat(2,minmax(0,1fr))}
  .pq-opts{gap:6px}
  .popt{padding:4px;border-width:2px}
  .frow{grid-template-columns:28px 1fr}
  .frow .fin{grid-column:1/-1}
  .dlg{grid-template-columns:auto 1fr}
  .dlg .ans-cell{grid-column:1/-1}
  .nm{font-size:13px;min-width:52px;min-height:32px;padding:2px 6px}
  .brand-text small{display:none}
  .present-in{grid-template-columns:1fr;font-size:20px}
}
@media print{
  .topbar,.main,.board-fab,.dict,.modal{display:none !important}
  .layout{display:block;padding:0}
  .board{position:static;max-height:none;border:none;display:block !important}
  .board-head-actions,.board-tabs,.lookup,.hint,.add-row,.card-actions{display:none !important}
  .bpanel{display:flex !important}
}
@media (prefers-reduced-motion:reduce){*{animation:none !important}.trail svg{opacity:1}}
@media (max-width:720px){ body:not(.board-open) .board{display:none !important} }
@media (min-width:721px){ .board-fab{display:none !important} }
.ctoast{position:absolute;left:8px;right:8px;top:8px;z-index:2;margin:0;background:#FFF4EC;color:#8A4A22;border:2px solid #F2C3A4;box-shadow:0 6px 16px rgba(43,37,64,.12)}
.pq-head > span[data-dict]{flex:1 1 auto}
.vcard{position:relative}
.vcard-head{padding-right:118px}
.vcard .card-actions{position:absolute;top:6px;right:6px}
@media (max-width:640px){
  .topbar-in{gap:8px;padding:8px 12px;flex-wrap:nowrap}
  .brand-text b{font-size:16px}
  .brand svg{width:34px;height:32px}
  .testnav{flex-wrap:nowrap;overflow-x:auto;gap:6px;scrollbar-width:none}
  .testnav button{padding:4px 12px;font-size:14px;min-height:36px;flex:0 0 auto}
  .top-actions .btn-sm{padding:4px 10px;font-size:14px;min-height:36px}
  .mode-badge{display:none}
  html{scroll-padding-top:70px}
}

.px{image-rendering:pixelated;image-rendering:crisp-edges;object-fit:contain;flex:0 0 auto}
.brand-cat{width:66px;height:50px}
.with-ico{display:inline-flex;align-items:center;gap:10px}
.help.with-ico{display:flex}
.result-ico{width:64px;height:auto}
.foot{display:flex;flex-direction:column;align-items:center;gap:6px}
.foot .plant{width:64px;height:auto}
.mark img{width:30px;height:auto}
@media (max-width:640px){.brand-cat{width:46px;height:35px}}

/* ===== teacher split screen ===== */
.splitter{display:none}
@media (min-width:721px){
  body.teacher{overflow:hidden}
  body.teacher .layout{max-width:none;align-items:stretch;height:calc(100vh - var(--topbar-h,64px));padding:0;gap:0;display:grid;grid-template-columns:minmax(300px,var(--split,56%)) 14px minmax(280px,1fr)}
  body.teacher .main{overflow:auto;height:100%;max-width:none;margin:0;padding:20px 20px 80px;scroll-padding-top:16px}
  body.teacher .main > *{max-width:980px;width:100%;margin-left:auto;margin-right:auto}
  body.teacher .board{position:static;height:100%;max-height:none;border-radius:0;border:none;border-left:2px solid var(--line);flex:none}
  body.teacher .splitter{display:flex;align-items:center;justify-content:center;cursor:col-resize;background:var(--ground);touch-action:none}
  body.teacher .splitter span{width:4px;height:56px;border-radius:4px;background:var(--line2)}
  body.teacher .splitter:hover span,body.dragging .splitter span{background:var(--purple)}
  body.dragging{user-select:none;cursor:col-resize}
  body.dragging iframe,body.dragging .main{pointer-events:none}
}
.board-head h2{font-size:20px}
.pub-status{font-size:13px;font-weight:700;border-radius:999px;padding:3px 10px;background:var(--ground);color:var(--muted)}
.pub-status.draft{background:#FFF1B8;color:#6E5600}
.pub-status.changed{background:#FFE7D1;color:#8A4A22}
.pub-status.live{background:var(--okbg);color:var(--okink)}
.pub-status.bad{background:var(--badbg);color:var(--badink)}
.board-tabs{flex-wrap:nowrap}
.btab{font-size:15px;padding:6px 4px;white-space:nowrap}
.btab b{display:inline-block;min-width:18px;font-size:12px;background:#fff;border-radius:999px;padding:0 5px;color:var(--key)}
.btab b:empty{display:none}
.btab.plan-tab{color:#8E2550}
.btab.plan-tab.active{background:var(--pink-soft);border-color:var(--pink-soft);color:#8E2550}

/* notes editor */
.note-meta{display:flex;gap:8px;flex-wrap:wrap}
.note-meta input,.note-meta select{height:42px;border:2px solid var(--line2);border-radius:12px;padding:4px 10px;font-size:16px;background:#fff}
.note-meta input{flex:1 1 220px;min-width:0;font-weight:700}
.note-meta select{flex:0 1 220px;min-width:0}
.note-tools{display:flex;flex-wrap:wrap;gap:4px;align-items:center;background:var(--ground);border-radius:12px;padding:4px}
.note-tools button{min-width:38px;height:36px;border:none;background:transparent;border-radius:9px;font-size:16px;display:inline-flex;align-items:center;justify-content:center;padding:0 8px}
.note-tools button:hover{background:#fff}
.note-tools .sep{width:2px;height:22px;background:var(--line2);margin:0 4px}
.note-tools .dot{width:18px;height:18px;border-radius:5px;display:inline-block}
.note-tools .tx{font-weight:700;font-size:18px}
.note-editor{min-height:340px;flex:1 1 auto;border:2px solid var(--line2);border-radius:16px;padding:14px 16px;font-size:20px;line-height:32px;outline:none;overflow-wrap:anywhere;
  background:#FFFEF8 repeating-linear-gradient(to bottom,transparent 0,transparent 31px,#EDE7F7 31px,#EDE7F7 32px);background-position:0 13px;background-attachment:local}
.note-editor:focus{border-color:var(--pink-line)}
.note-editor:empty::before{content:attr(data-ph);color:#A49DB5}
.note-editor h3,.note-html h3{font-size:22px;margin:0;line-height:32px;color:var(--key)}
.note-editor p,.note-editor div,.note-html p,.note-html div{margin:0}
.note-editor ul,.note-html ul{margin:0;padding-left:24px}
.note-editor mark,.note-html mark{background:#FFF1A8;color:inherit}
.note-actions{display:flex;flex-wrap:wrap;gap:10px;align-items:center}
.flash{margin:0;font-size:15px;font-weight:700;border-radius:12px;padding:8px 12px}
.flash.ok{background:var(--okbg);color:var(--okink)}
.flash.bad{background:var(--badbg);color:var(--badink)}
.bpanel[data-panel=notes]{min-height:100%}

/* plan */
.plan-actions{display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.danger-txt{color:var(--bad)}
.plan-body{display:flex;flex-direction:column;gap:10px}
.plan-sum{display:flex;flex-wrap:wrap;gap:8px}
.plan-sum .chip{cursor:pointer}
.hint.warn{background:#FFF4EC;color:#8A4A22;border-radius:12px;padding:8px 12px}
.ncard{border:2px solid var(--line);border-radius:16px;padding:10px 12px;background:#FFFEF8;display:flex;flex-direction:column;gap:6px}
.ncard-head{display:flex;gap:8px;align-items:flex-start}
.ncard-head b{font-size:17px;margin-right:8px}
.ptag{display:inline-block;font-size:12px;font-weight:700;color:#5B2E86;background:var(--purple-soft);border-radius:999px;padding:2px 8px;vertical-align:middle}
.note-html{font-size:17px;line-height:1.55;overflow-wrap:anywhere}
.note-html h3{line-height:1.3;font-size:19px}

/* selection popup */
.selpop{position:fixed;z-index:62;display:flex;gap:2px;background:var(--ink);border-radius:12px;padding:4px;box-shadow:0 8px 24px rgba(43,37,64,.3)}
.selpop button{border:none;background:transparent;color:#fff;font-weight:700;font-size:15px;min-height:36px;padding:4px 12px;border-radius:9px}
.selpop button:hover{background:rgba(255,255,255,.15)}

/* present: notes */
.present-in .pcard.wide{grid-column:1/-1;font-size:30px;line-height:1.6}
.present-in .pcard .gt{font-size:30px;font-weight:700;color:var(--key)}

/* ===== student review ===== */
.review{display:flex;flex-direction:column;gap:22px}
.review-loading{flex-direction:row;align-items:center;gap:10px;color:var(--muted)}
.review-empty{align-items:center;text-align:center}
.review-empty h2{margin:0}
.review-head{flex-direction:row;flex-wrap:wrap;align-items:center;gap:16px}
.review-head h2{margin:0;font-size:28px}
.part h2.with-ico{margin:0;font-size:24px}
.rnote{border:2px solid var(--line);border-radius:18px;padding:14px 16px;background:#FFFEF8}
.rnote-head{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin-bottom:6px}
.rnote-head h3{margin:0;font-size:20px}
.rvocab{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:12px}
.rv{border:2px solid var(--line);border-radius:18px;padding:12px 14px;display:flex;flex-direction:column;gap:6px;background:#fff}
.rv-head{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.rv-head .w{font-size:22px;font-weight:700}
.rv-head .ipa{color:var(--muted);font-size:15px}
.rv-head .pos{font-size:12px;font-weight:700;color:#fff;background:var(--purple);border-radius:999px;padding:1px 8px}
.rv-head .icon-btn{margin-left:auto}
.rv .vi{font-weight:700;color:var(--key);font-size:18px}
.rv .ex{font-style:italic;color:#4A3F66}
.rv .note{font-size:15px;color:var(--muted);white-space:pre-wrap}
.rv-tap{display:none;font-size:14px;color:var(--muted)}
.rvocab.quiz .rv{cursor:pointer}
.rvocab.quiz .rv:not(.peek) .rv-mean{display:none}
.rvocab.quiz .rv:not(.peek) .rv-tap{display:block}
.rgram{border-left:none;border:2px solid var(--keybg);border-radius:18px;padding:12px 16px;background:#F7FCFB}
.rgram h3{margin:0 0 6px;color:var(--key);font-size:19px}
.rgram .gb{white-space:pre-wrap;font-size:17px}
.sectab .with-ico{gap:8px}
.review-tab.active{border-color:#E8B400;background:#FFF7D6;color:#6E5600}
.sectabs{flex-wrap:wrap}
.sectab{flex:1 1 200px}
body.teacher .sectab small{display:none}

/* ===== lesson format v2 ===== */
.part-pick{display:flex;align-items:center;gap:8px;flex-wrap:wrap;padding:8px 14px;background:#F7FCFB;border-top:2px solid var(--keybg)}
.part-pick label{font-weight:700;font-size:15px;color:var(--key)}
.part-pick select{height:38px;border:2px solid var(--keybg);border-radius:10px;padding:2px 8px;font-size:15px;background:#fff;font-weight:700}
.part-pick .hint{font-size:13px}
.board-body{border-top:none}
.vcard-head{padding-right:118px}
.vrow{display:grid;grid-template-columns:118px 1fr;gap:6px;align-items:start}
.vlab{font-size:13px;font-weight:700;color:var(--muted);padding-top:5px}
.mini-part{height:32px;border:1px solid var(--line);border-radius:8px;font-size:14px;background:#fff;padding:0 4px;max-width:150px}
.pos-ed{font-size:15px}
.script-row{display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.script-btn{gap:6px}
.audio .transcript{background:#fff}
.transcript .tr-body{padding:12px 16px}
.present-in .script-present{font-size:26px;line-height:1.6}
.present-in .script-present .narr{font-style:italic;color:var(--muted)}

.rv-sub{font-style:italic;color:var(--muted)}
.rv-nav{flex:0 0 auto}
.rv-nav .chip.quick{background:#FFF7D6;border-color:#F2D675;color:#6E5600}
.rpart{gap:14px}
.rpart-head{display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap;border-bottom:3px solid #DDEBF7;padding-bottom:8px}
.rpart-head h2{margin:0;font-size:24px;color:#1F4E79}
.rscore{font-weight:700;font-size:18px;background:#DDEBF7;color:#1F4E79;border-radius:999px;padding:4px 14px}
.rscore.none{background:var(--ground);color:var(--muted);font-weight:400;font-size:15px}
.rh{margin:4px 0 0;font-size:19px;color:#1F4E79}
.rh.star::before{content:"";display:inline-block;width:22px;height:16px;margin-right:6px;vertical-align:-2px;background:url(../img/ui/star.png) center/contain no-repeat;image-rendering:pixelated}
.rtable-wrap{overflow-x:auto;border-radius:14px;border:2px solid #DDEBF7}
.rtable{width:100%;border-collapse:collapse;font-size:16px;min-width:640px}
.rtable th{background:#DDEBF7;color:#1F3B57;text-align:left;padding:10px 12px;font-size:15px}
.rtable td{padding:10px 12px;border-top:1px solid #E6EEF7;vertical-align:top}
.rtable tr:nth-child(even) td{background:#FAFCFE}
.rtable .word b{font-size:18px}
.rtable .wline{display:flex;align-items:center;gap:4px}
.rtable .ipa{color:var(--muted);font-size:13px}
.rtable .ex{color:#4A3F66}
.icon-btn.sm{width:32px;height:32px}
.rtable .mean .tap{display:none;color:var(--muted);font-size:13px;font-style:italic}
.review.quiz .rtable .mean{cursor:pointer}
.review.quiz .rtable .mean:not(.peek) .m{display:none}
.review.quiz .rtable .mean:not(.peek) .tap{display:inline}
.rnote-body{background:#FFFEF8;border:2px dashed #F2D675;border-radius:14px;padding:10px 14px}
.rnote-body ul{padding-left:22px}
.rgram{border:2px solid #DDEBF7;background:#F7FAFE;border-radius:14px;padding:10px 14px}
.rgram .rh{margin:0 0 6px}
.rgram .formula{margin:0 0 6px;font-size:18px}
.rgram ul{margin:0;padding-left:22px}
.quick-list{margin:0;padding-left:22px;columns:2 300px;column-gap:32px;font-size:17px}
.quick-list li{break-inside:avoid;margin-bottom:4px}
@media (max-width:640px){
  .rtable{min-width:0}
  .rtable thead{display:none}
  .rtable,.rtable tbody,.rtable tr,.rtable td{display:block;width:100%}
  .rtable tr{border-top:2px solid #DDEBF7;padding:6px 0}
  .rtable td{border:none;padding:3px 12px;display:grid;grid-template-columns:96px 1fr;gap:8px}
  .rtable td::before{content:attr(data-label);font-size:13px;font-weight:700;color:var(--muted)}
  .rtable tr:nth-child(even) td{background:none}
}
.key-btn{margin-left:auto;border-color:var(--key);color:var(--key)}
.key-btn.on{background:var(--keybg)}
@media (min-width:721px) and (max-width:1100px){
  body.teacher .main{padding:14px 12px 60px}
  body.teacher .part{padding:16px 12px}
  body.teacher .board-head h2{font-size:17px}
  body.teacher .board-head-actions .btn{padding:4px 8px;font-size:13px}
  body.teacher .btab{font-size:13px}
  body.teacher .part-pick .hint{display:none}
  body.teacher .vrow{grid-template-columns:1fr}
  body.teacher .vcard-head{padding-right:110px}
}
body.teacher .sectab{flex:1 1 140px;font-size:17px;padding:8px 12px;min-height:52px}
body.teacher .sectab img{width:30px;height:auto}

/* ===== homework ===== */
.hw-tab.active{border-color:var(--key);background:var(--keybg);color:var(--key)}
.hw-drop{display:flex;align-items:center;gap:12px;flex-wrap:wrap;border:2px dashed var(--line2);border-radius:16px;padding:14px;background:#FBF9FE}
.hw-drop>div{flex:1 1 200px;min-width:0}
.hw-drop.over{border-color:var(--pink);background:var(--pink-soft)}
.hw-body{display:flex;flex-direction:column;gap:14px}
.hw-h{margin:6px 0 0;font-size:17px;color:var(--key)}
.hw-draft{border:2px solid var(--pink-line);border-radius:16px;padding:12px;display:flex;flex-direction:column;gap:10px;background:#FFFAFC}
.hw-draft-head{display:flex;flex-direction:column;gap:6px}
.hw-title{height:42px;border:2px solid var(--line2);border-radius:12px;padding:4px 10px;font-weight:700;font-size:17px}
.hw-psec{border-top:2px solid var(--line);padding-top:8px;display:flex;flex-direction:column;gap:6px}
.hw-psec-t{font-weight:700;color:#1F4E79}
.hw-pq{display:flex;flex-direction:column;gap:4px;font-size:15px;padding:6px 8px;border-radius:10px;background:#fff}
.hw-pq-ans{display:flex;flex-wrap:wrap;gap:6px}
.hw-pq-ans input,.hw-pq-ans select{height:34px;border:2px solid var(--ok);border-radius:8px;padding:2px 8px;font-size:15px;min-width:120px;flex:1 1 140px;background:var(--okbg)}
.hw-pq-ans .empty{border-color:#E8B400;background:#FFF7D6}
.hw-card{border:2px solid var(--line);border-radius:14px;padding:10px 12px;display:flex;flex-direction:column;gap:8px;background:#fff}
.hw-card-head{display:flex;flex-direction:column}
.hw-card-acts{display:flex;flex-wrap:wrap;gap:6px}
.hw-res{display:flex;flex-direction:column;gap:6px}
.hw-table{width:100%;border-collapse:collapse;font-size:14px;min-width:520px}
.hw-table th{background:#DDEBF7;text-align:left;padding:6px 8px}
.hw-table td{padding:6px 8px;border-top:1px solid #E6EEF7;vertical-align:top}
.hw-notyet{margin:0;font-size:14px;background:#FFF4EC;color:#8A4A22;border-radius:10px;padding:8px 10px}
.hw-roster summary{cursor:pointer;font-weight:700;color:var(--muted);font-size:15px}
.hw-roster textarea{width:100%;margin-top:6px;border:2px solid var(--line2);border-radius:12px;padding:8px 10px;font-size:15px;resize:vertical}
.hw-item{flex-direction:row;flex-wrap:wrap;align-items:center;gap:12px}
.hw-item h3{margin:0;font-size:20px}
.hw-name{align-items:center;text-align:center;max-width:520px;margin:0 auto;width:100%}
.hw-name h2{margin:0}
.hw-name input{height:50px;width:100%;border:2px solid var(--line2);border-radius:14px;padding:4px 14px;font-size:20px;text-align:center}
.hw-clock-wrap{display:inline-flex;align-items:center;gap:6px;font-weight:700;font-size:20px;font-variant-numeric:tabular-nums;background:var(--ground);border-radius:999px;padding:6px 14px}
.hw-sec-t{margin:0;font-size:22px;color:#1F4E79}
.hw-foot{flex-direction:row;flex-wrap:wrap;align-items:center}
.btab{padding:6px 2px}

/* ===== nav tabs v2 ===== */
.sectabs{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px}
.navtab{position:relative;display:flex;flex-direction:column;align-items:center;justify-content:flex-start;gap:2px;padding:12px 8px 10px;border:3px solid var(--line);border-radius:20px;background:#fff;color:var(--ink);min-height:112px;text-align:center;transition:transform .12s ease,border-color .12s}
.navtab:hover{transform:translateY(-2px);border-color:var(--line2)}
.navtab-ico{position:relative;height:40px;display:flex;align-items:center;justify-content:center}
.navtab-ico img{width:auto;height:38px}
.navtab-label{font-size:20px;font-weight:700;line-height:1.2;white-space:nowrap}
.navtab-meta{font-size:13px;color:var(--muted);line-height:1.3}
.navtab.active{border-color:var(--pink);background:var(--pink-soft)}
.navtab.active .navtab-label{color:#8E2550}
.navtab.active::after{content:"";position:absolute;bottom:-9px;left:50%;width:14px;height:14px;background:var(--pink-soft);border-right:3px solid var(--pink);border-bottom:3px solid var(--pink);transform:translateX(-50%) rotate(45deg)}
.nav-review.active{border-color:#E8B400;background:#FFF7D6}.nav-review.active .navtab-label{color:#6E5600}.nav-review.active::after{background:#FFF7D6;border-color:#E8B400}
.nav-homework.active{border-color:var(--key);background:var(--keybg)}.nav-homework.active .navtab-label{color:var(--key)}.nav-homework.active::after{background:var(--keybg);border-color:var(--key)}
.navbadge{position:absolute;top:-6px;right:-14px;min-width:22px;height:22px;padding:0 6px;border-radius:999px;background:var(--bad);color:#fff;font-size:13px;font-weight:700;display:inline-flex;align-items:center;justify-content:center}
body.teacher .navtab{min-height:96px;padding:10px 6px}
body.teacher .navtab-label{font-size:17px}
body.teacher .navtab-meta{font-size:12px}
@media (max-width:640px){
  .sectabs{gap:6px}
  .navtab{min-height:84px;padding:8px 4px;border-radius:16px;border-width:2px}
  .navtab-ico img{height:28px}
  .navtab-ico{height:30px}
  .navtab-label{font-size:15px;white-space:normal}
  .navtab-meta{display:none}
}
.instr-vi{margin:2px 0 0;font-size:16px;color:var(--muted)}
.warn-btn{background:#FFF1B8 !important;color:#6E5600 !important;border-color:#E8B400 !important}
.teacher-btn{gap:6px;color:var(--muted)}

/* ===== phone & tablet polish ===== */
.topbar{padding-top:env(safe-area-inset-top,0px)}
.topbar-in{padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}
@supports (height:100dvh){ @media (min-width:721px){ body.teacher .layout{height:calc(100dvh - var(--topbar-h,64px))} } }
.board-fab{bottom:calc(16px + env(safe-area-inset-bottom,0px))}
.lpills{display:grid !important;grid-template-columns:repeat(8,minmax(0,1fr));gap:6px;flex:1 1 360px;max-width:440px}
.lpills .pill{width:auto;min-width:0;padding:0;height:44px}
.dlg .pills{display:grid;grid-template-columns:repeat(8,minmax(36px,48px));gap:6px}
.dlg .pills .pill{padding:0;height:44px}
@media (max-width:1100px){
  body.teacher .navtab-meta{display:none}
  body.teacher .navtab{min-height:80px}
}
@media (max-width:640px){
  .layout{padding:12px max(12px,env(safe-area-inset-left,0px)) 60px max(12px,env(safe-area-inset-right,0px));gap:14px}
  .main{gap:14px}
  .scorebar{padding:10px 12px;gap:8px}
  .scorebar > img{display:none}
  .scorebar .total{font-size:18px}
  .scorebar .chips{flex-wrap:nowrap;overflow-x:auto;flex:1 1 100%;padding-bottom:2px;scrollbar-width:none}
  .scorebar .chips::-webkit-scrollbar{display:none}
  .scorebar .chip{flex:0 0 auto}
  .scorebar > .btn{min-height:36px;font-size:14px;padding:4px 12px}
  .part-head{gap:10px}
  .part-badge{width:48px;height:48px;border-radius:15px} .part-badge img{width:30px;height:30px} .pb-num{min-width:24px;height:24px;font-size:13px;right:-6px;bottom:-6px}
  .part-title{flex-basis:calc(100% - 60px)}
  .instr{font-size:17px}
  .instr-vi{font-size:15px}
  .lrow{padding:8px}
  .lrow img{width:40px;height:62px}
  .lpills{flex:1 1 100%;max-width:none;gap:4px}
  .lpills .pill{height:40px;font-size:16px}
  .dlg .pills{grid-template-columns:repeat(8,minmax(0,1fr));gap:4px;width:100%}
  .dlg .pills .pill{height:40px;font-size:16px}
  .pq{padding:8px}
  .popt .tickbox{width:30px;height:30px}
  .popt .lab{font-size:17px}
  .storybox{line-height:2.2;font-size:17px}
  .gap{font-size:17px;height:42px}
  .gap.m,.gap.l{width:100%;max-width:260px}
  .qline{padding:8px 10px}
  .part-foot .btn{flex:1 1 auto}
  .key-btn{margin-left:0}
  .review-head{gap:10px}
  .review-head h2{font-size:22px}
  .rpart-head h2{font-size:19px}
  .hw-item .btn{width:100%}
  .navtab-label{font-size:14px}
}
@media (hover:none){ .navtab:hover{transform:none} }

/* ===== speaking ===== */
.speak{display:flex;flex-direction:column;gap:14px}
.say-btn{display:inline-flex;align-items:center;gap:6px;flex:0 0 auto;min-width:40px;height:40px;padding:0 10px;border-radius:999px;border:2px solid var(--purple);background:#fff;color:var(--purple);font-weight:700;font-size:15px}
.say-btn:hover{background:var(--purple-soft)}
.sp-intro{display:flex;gap:10px;align-items:flex-start;background:#F1F6FF;border-radius:16px;padding:12px 14px}
.sp-intro p{margin:0;font-size:17px;line-height:1.5}
.sp-pics{display:grid;grid-template-columns:1fr;gap:12px}
.sp-pics.two{grid-template-columns:repeat(2,minmax(0,1fr))}
.sp-pics figure,.sp-story figure{margin:0;display:flex;flex-direction:column;gap:6px;position:relative}
.sp-pics figcaption{text-align:center;font-weight:700;color:var(--muted);font-size:15px}
.sp-list{margin:0;padding:0 0 0 4px;list-style:none;counter-reset:sp;display:flex;flex-direction:column;gap:10px}
.sp-list li{counter-increment:sp;display:flex;flex-direction:column;gap:6px;padding:10px 12px;border-radius:16px;background:#FBF9FE}
.sp-q{display:flex;gap:10px;align-items:center;font-size:18px}
.sp-q::before{content:counter(sp);flex:0 0 auto;width:30px;height:30px;border-radius:50%;background:var(--purple-soft);color:var(--purple);font-weight:700;font-size:15px;display:inline-flex;align-items:center;justify-content:center}
.sp-a{padding-left:40px}
.sp-a .keytag{font-size:16px;white-space:normal}
.sp-back{padding-left:40px;font-size:14px;color:var(--key);font-style:italic}
.sp-teacher,.sp-block{border:2px solid var(--keybg);border-radius:16px;padding:10px 14px;display:flex;flex-direction:column;gap:6px;background:#F7FCFB}
.sp-block{border-color:var(--line);background:#fff}
.sp-tlabel{font-weight:700;color:var(--key)}
.sp-line{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.sp-model{display:flex;flex-direction:column;gap:6px}
.sp-cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.sp-card{border:2px solid var(--line);border-radius:18px;padding:12px;display:flex;flex-direction:column;align-items:center;gap:8px;background:#fff}
.sp-card.ask{border-style:dashed;border-color:var(--pink-line)}
.sp-card img{height:150px;width:auto;object-fit:contain}
.sp-card h3{margin:0;font-size:18px}
.sp-table{width:100%;border-collapse:collapse;font-size:16px}
.sp-table th{text-align:left;padding:6px 8px;background:#DDEBF7;width:40%;font-size:15px}
.sp-table td{padding:6px 8px;border-bottom:1px solid #E6EEF7}
.sp-table .gap{width:100%;height:38px;font-size:16px}
.sp-story{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
.sp-num{position:absolute;top:6px;left:6px;width:32px;height:32px;border-radius:50%;background:var(--ink);color:#fff;font-weight:700;display:flex;align-items:center;justify-content:center;z-index:1}
.sp-story figcaption{font-size:15px;line-height:1.4}
.sp-story .sp-a{padding:6px 8px;background:var(--keybg);color:var(--key);border-radius:10px}
.sp-story .sp-back{padding-left:0}
.rec{border:2px dashed var(--pink-line);border-radius:16px;padding:12px;background:#FFFAFC;display:flex;flex-direction:column;gap:8px}
.rec-row{display:flex;flex-wrap:wrap;gap:10px;align-items:center}
.rec-dot{width:12px;height:12px;border-radius:50%;background:var(--bad);display:inline-block}
.rec-btn.on{background:var(--badbg);border-color:var(--bad);color:var(--badink)}
.rec-btn.on .rec-dot{animation:blink 1s infinite}
@keyframes blink{50%{opacity:.2}}
.rec-list{display:flex;flex-direction:column;gap:6px}
.rec-item{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.rec-item audio{flex:1 1 240px;max-width:100%}
.sectabs{grid-template-columns:repeat(5,minmax(0,1fr))}
@media (max-width:900px){ .sp-story{grid-template-columns:repeat(2,minmax(0,1fr))} }
@media (max-width:640px){
  .sp-pics.two,.sp-cards{grid-template-columns:1fr}
  .sp-story{grid-template-columns:1fr 1fr;gap:8px}
  .sp-q{font-size:16px}
  .sp-a,.sp-back{padding-left:0}
  .navtab-label{font-size:13px}
  .navtab-ico img{height:24px}
}
@media (max-width:640px){ .sp-intro{flex-direction:column;gap:8px} .sp-intro p{font-size:16px} .sp-card img{height:110px} }
.speed-bar{display:flex;flex-wrap:wrap;gap:6px;align-items:center}.speed-bar .pill{min-height:38px;font-size:15px}
.rec-item .btn{flex:0 0 auto}
.rec-name{display:flex;gap:6px;align-items:center}
.rec-name .gap{width:180px;height:36px;font-size:15px}
.rec-top{display:flex;justify-content:space-between;align-items:center;gap:8px;flex-wrap:wrap}
.rec-top select{height:36px;border:2px solid var(--line2);border-radius:10px;padding:0 6px}
.rec-card{border:2px solid var(--line);border-radius:14px;padding:8px 12px;background:#fff}
.rec-card summary{cursor:pointer;font-size:16px}
.rec-entry{display:flex;flex-direction:column;gap:4px;padding:8px 0;border-top:1px solid var(--line)}
.rec-meta{display:flex;flex-wrap:wrap;gap:6px;align-items:baseline;font-size:14px}
.rec-play{display:flex;gap:6px;align-items:center}
.rec-play audio{flex:1;min-width:0;height:36px}
.btab{font-size:13px}
/* test nav grouped by book */
.testnav{gap:10px;flex-wrap:nowrap;overflow-x:auto;scrollbar-width:none;padding:2px}
.testnav::-webkit-scrollbar{display:none}
.tn-group{display:flex;align-items:center;gap:4px;background:var(--ground);border-radius:999px;padding:3px 4px 3px 12px;flex:0 0 auto}
.tn-group.cur{background:var(--purple-soft)}
.tn-book{font-size:13px;font-weight:700;color:var(--muted);white-space:nowrap;margin-right:2px}
.tn-group button{min-height:36px;min-width:42px;padding:2px 10px;font-size:15px;border:2px solid transparent;background:#fff;border-radius:999px;font-weight:700}
.tn-group button.active{background:var(--purple);color:#fff}
@media (max-width:640px){
  .topbar-in{flex-wrap:wrap}
  .testnav{order:3;flex:1 1 100%}
  .brand-text small{display:block !important;font-size:11px}
}
.yt-box{display:flex;flex-direction:column;gap:8px}
.yt-frame{position:relative;width:100%;aspect-ratio:16/9;max-width:560px;border-radius:12px;overflow:hidden;background:#000}
.yt-frame iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.yt-link{align-self:flex-start;gap:8px}
.yt-edit{display:flex;flex-wrap:wrap;gap:6px;align-items:center;border-top:1px dashed #F2C3A4;padding-top:8px}
.yt-edit input{height:34px;border:2px solid var(--line2);border-radius:8px;padding:2px 8px;font-size:14px;flex:1 1 220px;min-width:0}
.yt-edit input.yt-start{flex:0 0 70px}
.letter-line{margin:0;padding:0 12px;font-size:18px;line-height:1.7}
.essay{display:flex;flex-direction:column;gap:8px}
.essay-ta{width:100%;min-height:150px;border:2px solid #CFC3DD;border-radius:14px;padding:12px 14px;font-size:18px;line-height:1.6;resize:vertical;background:#FFFEF8}
.essay-ta:focus{outline:3px solid var(--pink-line);border-color:var(--pink)}
.essay-count{font-size:14px;color:var(--bad);font-weight:700}
.essay-count.ok{color:var(--ok)}
.essay-model p{margin:4px 0;font-style:italic}
.cwrite{width:100%;max-width:600px}
.lrow img[src*="/l3-"]{object-fit:cover;border-radius:10px}
.sp-text[hidden]{display:none}
.yt-bar{display:flex;flex-wrap:wrap;align-items:center;gap:10px}
.yt-range{font-weight:700;color:var(--purple);background:var(--purple-soft);border-radius:999px;padding:4px 12px;font-size:14px}
a.yt-link{text-decoration:underline}
a.yt-open{display:flex;align-items:center;gap:14px;max-width:560px;padding:16px 18px;border-radius:16px;background:#fff;border:2px solid #F3C9C9;color:inherit;text-decoration:none;box-shadow:0 2px 0 #F3C9C9}
a.yt-open:hover{background:#FFF5F5}
a.yt-open span{display:flex;flex-direction:column;gap:2px}
a.yt-open b{font-size:17px}
a.yt-open small{color:var(--purple);font-weight:600;font-size:14px}

.rec.rec-sm{border:0;background:transparent;padding:4px 0 0 40px;gap:6px}
.rec-sm .rec-btn{height:36px;font-size:14px}
.sp-qbox{display:flex;flex-direction:column;gap:2px;padding:8px 0;border-bottom:1px dashed var(--line)}
.sp-qbox:last-child{border-bottom:0}
.sp-qbox .rec.rec-sm{padding-left:0}
.sp-story figure .rec.rec-sm{padding-left:0;align-items:center}
.stt-live{font-size:15px;color:var(--purple);background:var(--purple-soft);border-radius:10px;padding:6px 10px}
.stt-out{font-size:15px;background:#F2FBF4;border-left:4px solid var(--good,#2FA84F);border-radius:8px;padding:6px 10px;margin-top:4px}
.stt-out.none{background:#FFF7E8;border-left-color:#F2A23A;color:#8a5a00}
.rec-entry-s{display:flex;flex-direction:column}
@media (max-width:640px){.rec.rec-sm{padding-left:0}}
.yt-shield{position:absolute;inset:0;z-index:2;cursor:pointer;background:transparent}
.yt-frame > div:first-child, .yt-frame iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.yt-ctrl{display:flex;align-items:center;gap:10px;max-width:560px;flex-wrap:wrap}
.yt-play{width:48px;height:48px;border-radius:50%;border:0;background:var(--purple);color:#fff;display:inline-flex;align-items:center;justify-content:center;cursor:pointer;flex:0 0 auto}
.yt-play:hover{filter:brightness(1.1)}
.yt-mid{flex:1 1 200px;display:flex;align-items:center;gap:8px;min-width:0}
.yt-seek{flex:1;min-width:0;accent-color:var(--purple);height:28px}
.yt-time{font-variant-numeric:tabular-nums;font-weight:700;color:var(--purple);font-size:14px;white-space:nowrap}