/* Phong cách bảng lật: viền đen, bóng xám, 4 màu bút dạ */
:root{--ink:#111;--paper:#FFFDF5;--card:#fff;--shadow:#C8C8C8;--mute:#5d5d5d;--yel:#F7D84A;--org:#F58A1F;--blu:#3FA9D6;--red:#E8203A;--ok:#1d87b8;--bad:#E8203A;--bg:#f1efe6;--line:#bdbdbd}
*{box-sizing:border-box}
html{background:var(--paper)}
body{margin:0;color:var(--ink);font:19px/1.45 "Patrick Hand","Noto Sans Khmer","Comic Sans MS","Segoe Print",system-ui,sans-serif;background:var(--paper) radial-gradient(circle,#e9e5d6 1.3px,transparent 1.6px) 0 0/26px 26px;min-height:100vh}
h1,h2,h3{font-weight:400;letter-spacing:.3px;margin:0}
.wm{font-size:14px;color:#a2a2a2;letter-spacing:1px;text-align:center}
.ink{filter:url(#wobble) drop-shadow(4px 4px 0 var(--shadow))}

/* khung có nét vẽ tay (viền + bóng nằm ở ::before để chữ vẫn sắc nét) */
.card,.stat,.qrow,button,.banner,.chip{position:relative;isolation:isolate}
.card::before,.stat::before,.qrow::before,button::before,.banner::before,.chip::before{content:"";position:absolute;inset:0;z-index:-1;background:var(--card);border:3px solid var(--ink);border-radius:14px 10px 16px 9px/10px 15px 9px 14px;filter:url(#wobble)}
.card::before,.qrow::before,.banner::before{box-shadow:6px 6px 0 var(--shadow)}
.card{background:transparent;padding:18px;margin-bottom:20px}
.card h2{font-size:24px;margin-bottom:8px}
main{max-width:980px;margin:0 auto;padding:16px}
.row{display:flex;gap:12px;flex-wrap:wrap;align-items:center}
.grow{flex:1}
.mute{color:var(--mute);font-size:16px}

header.top{padding:14px 16px 4px;display:flex;align-items:center;gap:12px;max-width:980px;margin:0 auto}
header.top .grow{flex:1}
.banner{display:inline-block;padding:6px 26px;margin:0}
.banner::before{background:var(--yel);transform:rotate(-1.2deg)}
.banner span{display:block;font-size:26px;text-transform:uppercase;letter-spacing:1.5px;transform:rotate(-1.2deg)}

button{font:inherit;color:var(--ink);background:transparent;border:0;padding:8px 16px;cursor:pointer;margin:0;transition:transform .12s}
button:hover:not(:disabled){transform:translate(-1px,-2px) rotate(-.6deg)}
button:active:not(:disabled){transform:translate(2px,2px)}
button::before{box-shadow:3px 3px 0 var(--shadow)}
button.pri::before{background:var(--yel)}
button.danger{color:var(--red)}button.danger::before{border-color:var(--red)}
button:disabled{opacity:.45;cursor:not-allowed}
input,textarea,select{font:inherit;color:var(--ink);background:#fff;border:3px solid var(--ink);border-radius:12px 8px 13px 7px/8px 12px 7px 11px;padding:8px 12px;width:100%;outline:none}
input:focus,textarea:focus{box-shadow:0 0 0 4px var(--yel)}
textarea{min-height:170px;font-family:ui-monospace,Menlo,Consolas,monospace;font-size:14px}
.chip{display:inline-block;padding:0 12px;font-size:15px}
.chip::before{border-width:2px;border-radius:99px;background:#fff}
.chip.ok::before,.chip.live::before{background:var(--blu)}
.chip.bad::before{background:var(--red)}.chip.bad{color:#fff}
.err{color:var(--red)}.okmsg{color:var(--ok)}

.qt{font-size:26px;margin:6px 0;line-height:1.3}
.qt + .qt{color:var(--mute);font-size:20px;border-top:2px dashed var(--line);padding-top:6px}
.num{display:inline-flex;align-items:center;justify-content:center;width:46px;height:46px;border:3px solid var(--ink);border-radius:50%;background:var(--org);font-size:24px;box-shadow:3px 3px 0 var(--shadow);margin-bottom:6px;filter:url(#wobble)}

.grid{display:grid;gap:16px;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));margin-bottom:20px}
.stat{padding:12px;text-align:center;font-size:16px}
.stat::before{background:var(--yel);box-shadow:4px 4px 0 var(--shadow)}
.stat:nth-child(2)::before{background:#fff}
.stat:nth-child(3)::before{background:var(--blu)}
.stat:nth-child(4)::before{background:#ff9aa8}
.stat:nth-child(5)::before{background:#ffd9a8}
.stat b{display:block;font-size:38px;font-weight:400;line-height:1.1}
.stat b[style]{color:var(--ink)!important}

.bar{height:22px;border:3px solid var(--ink);border-radius:10px;background:#fff;overflow:hidden;margin:6px 0 10px;filter:url(#wobble)}
.bar i{display:block;height:100%;border-right:2px solid var(--ink)}
.bar i.ok{background:var(--blu)}.bar i.bad{background:var(--red)}

table{width:100%;border-collapse:collapse;font-size:17px}
th,td{padding:8px;border-bottom:2px dashed var(--line);text-align:left;vertical-align:top}
th{color:var(--ink);font-weight:400;border-bottom:3px solid var(--ink)}
td.okmsg{color:var(--ok)}

.tabs{display:flex;gap:10px;margin-bottom:18px}
.tabs button.on::before{background:var(--yel)}
.qrow{display:flex;gap:10px;align-items:center;padding:10px 12px;margin-bottom:14px}
.qrow.cur::before{background:#fff6c4;border-color:var(--org)}
.qrow .n{width:34px;height:34px;border:3px solid var(--ink);border-radius:50%;text-align:center;line-height:28px;background:var(--org)}
.qrow .tx{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
pre.prompt{white-space:pre-wrap;background:#fff;border:3px dashed var(--ink);border-radius:12px;padding:12px;font-size:15px;max-height:300px;overflow:auto}

/* trang học viên */
.stu{min-height:100vh;display:flex;flex-direction:column;justify-content:center;max-width:560px;margin:0 auto;padding:20px 16px 90px}
.stu .top{text-align:center;margin-bottom:6px}
.stu .card{text-align:center}
.stu .card h2{margin-bottom:4px}
.ans{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:22px}
.ans button{font-size:30px;padding:26px 6px;letter-spacing:1px}
.ans button::before{border-width:4px;box-shadow:5px 5px 0 var(--shadow)}
.ans .t::before{background:#d5eef9}.ans .f::before{background:#ffd5db}
.ans button.sel.t::before{background:var(--blu)}.ans button.sel.f::before{background:var(--red)}
.ans button.sel.f{color:#fff}
.ans button:disabled:not(.sel){opacity:.35}
.ans button.sel:disabled{opacity:1}
.big{font-size:26px}
.mascot{position:fixed;left:8px;bottom:4px;pointer-events:none}
.swing{transform-origin:50% 10%;animation:swing 2.2s ease-in-out infinite}
@keyframes swing{0%,100%{transform:rotate(-8deg)}50%{transform:rotate(8deg)}}
.pop{animation:pop .45s ease-out}
@keyframes pop{0%{transform:scale(.6) rotate(-6deg)}70%{transform:scale(1.1) rotate(2deg)}100%{transform:scale(1)}}
@media(prefers-reduced-motion:reduce){.swing,.pop{animation:none}}
.banner + .wm{margin-top:8px}

:lang(km){line-height:1.85}
.qt[lang=km]{font-family:"Noto Sans Khmer","Patrick Hand",sans-serif;font-size:24px}
.ans button{line-height:1.5}

.langs{display:flex;gap:8px;justify-content:center;flex-wrap:wrap;margin:10px 0 4px}
.langs button{padding:2px 12px;font-size:16px}
.langs button.on::before{background:var(--yel)}
[hidden]{display:none!important}

.seg{display:inline-flex;gap:6px}
.kbtn.t.on::before{background:var(--blu)}
.kbtn.f.on::before{background:var(--red)}
.kbtn.f.on{color:#fff}

/* ===== Kahoot-style: linh vật, nút hình khối, phản hồi, bục vinh danh ===== */
:root{--grn:#3DBE6B;--grn-d:#1f8f4a}
.av{position:relative;isolation:isolate;display:inline-flex;align-items:center;justify-content:center;width:var(--s,44px);height:var(--s,44px);font-size:calc(var(--s,44px)*.62);line-height:1;flex:none;font-family:"Apple Color Emoji","Segoe UI Emoji","Noto Color Emoji",sans-serif}
.av::before{content:"";position:absolute;inset:0;z-index:-1;border:3px solid var(--ink);border-radius:50%;background:var(--avbg,#FFE08A);filter:url(#wobble);box-shadow:3px 3px 0 var(--shadow)}
.tdot{display:inline-block;width:.75em;height:.75em;border:2px solid var(--ink);border-radius:50%;vertical-align:baseline;margin-right:4px}
.tchip{display:inline-block;padding:0 12px;border:3px solid var(--ink);border-radius:99px;font-size:17px;color:var(--ink)}

/* trang học viên: chế độ câu hỏi toàn màn hình */
.stu.qmode{max-width:640px;padding:10px 12px 14px;justify-content:flex-start;height:100vh;height:100dvh;min-height:0}
.stu.qmode .top{display:none}
.qtop{display:flex;align-items:center;gap:10px;margin-bottom:8px}
.qtop .num{margin:0;width:40px;height:40px;font-size:21px}
.tbar{flex:1;height:18px;border:3px solid var(--ink);border-radius:10px;background:#fff;overflow:hidden;position:relative}
.tbar i{display:block;height:100%;width:100%;background:var(--blu);transform-origin:left;transition:background .3s}
.tbar i.warn{background:var(--org)}.tbar i.hot{background:var(--red)}
.tsec{min-width:36px;text-align:right;font-size:24px}
.qeye{width:40px;height:40px;padding:0;font-size:20px}
.qpeek{margin:0 0 8px;text-align:left}
.shapes{flex:1;display:flex;flex-direction:column;gap:14px;min-height:0}
.shp{flex:1;min-height:110px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:6px;color:#fff;font-size:clamp(28px,7vw,42px);letter-spacing:1px;padding:8px}
.shp::before{border-width:5px!important;box-shadow:6px 6px 0 var(--shadow)!important}
.shp.t::before{background:var(--blu)}.shp.f::before{background:var(--red)}
.shp svg{width:min(26vh,44vw);height:min(26vh,44vw);max-height:46%;filter:drop-shadow(3px 3px 0 rgba(0,0,0,.25))}
.shp span{text-shadow:2px 2px 0 rgba(0,0,0,.35)}
.shp.sel{transform:scale(1.02)}
.shp:disabled:not(.sel){opacity:.28}
.shp:disabled.sel{opacity:1}
.sentmsg{text-align:center;font-size:22px;margin:8px 0 0}
.snd{position:fixed;right:8px;top:8px;width:40px;height:40px;padding:0;font-size:20px;z-index:20}
.me{display:flex;align-items:center;justify-content:center;gap:12px;margin:6px 0}
.me b{font-size:26px;font-weight:400}

/* phản hồi đúng/sai toàn màn hình */
.fb{position:fixed;inset:0;z-index:60;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;color:#fff;padding:20px;animation:fbin .35s ease-out}
.fb.ok{background:var(--grn)}.fb.bad{background:var(--red)}.fb.miss{background:#6b6b6b}
.fb .sym{width:min(34vw,170px);height:min(34vw,170px);border:6px solid var(--ink);border-radius:50%;background:#fff;display:flex;align-items:center;justify-content:center;box-shadow:7px 7px 0 rgba(0,0,0,.25);animation:pop .55s ease-out}
.fb .vd{font-size:clamp(40px,12vw,68px);margin:12px 0 0;text-shadow:3px 3px 0 rgba(0,0,0,.3);letter-spacing:1px}
.fb .gain{font-size:clamp(46px,15vw,90px);line-height:1.05;background:rgba(0,0,0,.2);border:5px solid var(--ink);border-radius:18px 12px 20px 11px/12px 18px 11px 17px;padding:0 24px;margin:12px 0}
.fb .pill{display:inline-block;background:#fff;color:var(--ink);border:4px solid var(--ink);border-radius:99px;padding:2px 18px;margin:5px 4px;font-size:clamp(20px,5.5vw,28px);box-shadow:3px 3px 0 rgba(0,0,0,.25)}
.fb .tm{margin-top:8px;font-size:22px}
@keyframes fbin{from{opacity:0;transform:scale(1.08)}to{opacity:1;transform:none}}
.endav{display:flex;justify-content:center;margin:6px 0}
.rank-big{font-size:64px;line-height:1}

/* màn chiếu: đồng hồ, biểu đồ, bảng xếp hạng, bục vinh danh */
.avs{display:inline-flex;vertical-align:middle;margin-right:6px}
.askrow{display:flex;align-items:center;justify-content:center;gap:clamp(18px,4vw,70px);margin:8px 0}
.ring{position:relative;width:clamp(110px,min(15vw,22vh),230px);aspect-ratio:1}
.ring svg{width:100%;height:100%;transform:rotate(-90deg);overflow:visible}
.ring circle{fill:#fff;stroke:var(--ink);stroke-width:5}
.ring .arc{fill:none;stroke:var(--blu);stroke-width:12;stroke-linecap:round;transition:stroke .3s}
.ring .arc.warn{stroke:var(--org)}.ring .arc.hot{stroke:var(--red)}
.ring b{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;font-size:clamp(44px,min(6.5vw,10vh),100px);font-weight:400}
.ring.hot b{color:var(--red);animation:pulse .5s ease-in-out infinite alternate}
@keyframes pulse{to{transform:scale(1.18)}}
.anscnt{text-align:center;font-size:clamp(18px,2.2vw,34px)}
.anscnt b{display:block;font-size:clamp(46px,min(7vw,11vh),110px);font-weight:400;line-height:1}
.tiles{display:grid;grid-template-columns:1fr 1fr;gap:clamp(14px,2vw,30px);margin-top:8px}
.tile{display:flex;align-items:center;justify-content:center;gap:clamp(12px,2vw,28px);color:#fff;font-size:clamp(30px,min(4.6vw,8vh),72px);padding:clamp(8px,1.6vh,24px)}
.tile{position:relative;isolation:isolate}
.tile::before{content:"";position:absolute;inset:0;z-index:-1;border:5px solid var(--ink);border-radius:14px 10px 16px 9px/10px 15px 9px 14px;filter:url(#wobble);box-shadow:7px 7px 0 var(--shadow)}
.tile.t::before{background:var(--blu)}.tile.f::before{background:var(--red)}
.tile span{text-shadow:2px 2px 0 rgba(0,0,0,.3)}
.tile svg{width:clamp(44px,min(6vw,10vh),110px);height:clamp(44px,min(6vw,10vh),110px)}
.chart{display:grid;grid-template-columns:1fr 1fr;gap:clamp(20px,5vw,90px);align-items:end;height:clamp(180px,34vh,420px);padding:0 clamp(10px,6vw,120px);margin-top:12px}
.cbar{display:flex;flex-direction:column;justify-content:flex-end;align-items:center;height:100%}
.cbar .cn{font-size:clamp(30px,min(5vw,8vh),84px);line-height:1}
.cbar .cb{width:100%;min-height:10px;height:0;border:5px solid var(--ink);border-radius:14px 14px 4px 4px;position:relative;transition:height 1.1s cubic-bezier(.2,1.1,.3,1);box-shadow:6px 6px 0 var(--shadow)}
.cbar.t .cb{background:var(--blu)}.cbar.f .cb{background:var(--red)}
.cbar.lose .cb{opacity:.35;background-image:repeating-linear-gradient(45deg,transparent 0 12px,rgba(255,255,255,.55) 12px 24px)}
.cbar.lose .cn{opacity:.5}
.cbar .ck{position:absolute;top:-22px;right:-18px;transform:rotate(10deg);font-size:clamp(24px,2.8vw,44px);background:var(--yel);border:4px solid var(--ink);border-radius:50%;width:1.9em;height:1.9em;display:flex;align-items:center;justify-content:center}
.cbar .cl{display:flex;align-items:center;gap:10px;margin-top:12px;font-size:clamp(22px,min(3vw,5vh),48px)}
.cbar .cl svg{width:1.3em;height:1.3em}
.lbrow{display:flex;align-items:center;gap:clamp(10px,1.6vw,22px);padding:clamp(6px,1.2vh,14px) clamp(10px,1.6vw,22px);margin-bottom:clamp(8px,1.4vh,16px);animation:lbin .6s ease-out both;position:relative;isolation:isolate}
.lbrow::before{content:"";position:absolute;inset:0;z-index:-1;background:#fff;border:4px solid var(--ink);border-radius:16px 11px 18px 10px/11px 17px 10px 16px;filter:url(#wobble);box-shadow:5px 5px 0 var(--shadow)}
.lbrow.r1::before{background:var(--yel);border-width:6px}
.lbrow .rk{width:clamp(36px,4vw,64px);height:clamp(36px,4vw,64px);border:4px solid var(--ink);border-radius:50%;background:var(--org);display:flex;align-items:center;justify-content:center;font-size:clamp(20px,2.4vw,38px);flex:none}
.lbrow .nm{flex:1;font-size:clamp(24px,min(3.2vw,5.4vh),52px);line-height:1.1;word-break:break-word}
.lbrow .gn{font-size:clamp(18px,2vw,32px);color:var(--ok)}
.lbrow .tp{font-size:clamp(26px,min(3.6vw,6vh),58px);min-width:3.2em;text-align:right}
.lbrow .fire{font-size:clamp(16px,1.8vw,28px);color:var(--org)}
@keyframes lbin{from{opacity:0;transform:translateX(-60px) scale(.9)}to{opacity:1;transform:none}}
.tmrow{display:flex;align-items:center;gap:12px;margin:8px 0;font-size:clamp(20px,2.4vw,36px)}
.tmrow .tw{flex:1;min-width:0}.tmrow .tb{height:clamp(22px,3vh,38px);border:4px solid var(--ink);border-radius:10px;transition:width 1s ease-out;min-width:8px}
.podium{display:grid;grid-template-columns:1fr 1.15fr 1fr;gap:clamp(10px,2vw,30px);align-items:end;max-width:1100px;margin:0 auto;height:clamp(280px,56vh,600px)}
.pcol{display:flex;flex-direction:column;align-items:center;justify-content:flex-end;height:100%;opacity:0;transform:translateY(40px) scale(.8);transition:opacity .5s,transform .5s}
.pcol.in{opacity:1;transform:none}
.pcol .who{text-align:center;margin-bottom:8px}
.pcol .who .nm{font-size:clamp(22px,min(3vw,5vh),52px);line-height:1.1;word-break:break-word}
.pcol .who .pt{font-size:clamp(20px,min(2.4vw,4vh),40px);color:var(--mute)}
.pcol .blk{width:100%;border:5px solid var(--ink);border-radius:14px 14px 0 0;display:flex;align-items:flex-start;justify-content:center;font-size:clamp(46px,min(7vw,12vh),120px);padding-top:6px;box-shadow:7px 7px 0 var(--shadow);transform-origin:bottom;transform:scaleY(.05);transition:transform .9s cubic-bezier(.2,1.1,.3,1)}
.pcol.in .blk{transform:none}
.pcol.p1 .blk{background:var(--yel);height:54%}.pcol.p2 .blk{background:#dfe6ea;height:40%}.pcol.p3 .blk{background:#f0b787;height:28%}
.pcol .crown{font-size:clamp(34px,5vw,80px);line-height:1;animation:swing 2s ease-in-out infinite}
.pmore{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;margin-top:18px}
.pmore .lbrow{margin:0;min-width:260px}
@media(prefers-reduced-motion:reduce){.pcol,.pcol .blk,.cbar .cb{transition:none}}

.stu.qmode #v{flex:1;display:flex;flex-direction:column;min-height:0}
.stu.qmode + .snd{top:auto;bottom:8px}
button.plain{padding:0}button.plain::before{display:none}

/* ===== Loại câu hỏi mới: chọn đáp án, đám mây từ, hỏi mở, slide ===== */
.kbtn.o.on::before{background:var(--blu)}
.kbtn.o.on{color:#fff}
.shp.o::before{background:var(--bg)!important}
.shp.o.dk{color:var(--ink)}.shp.o.dk span{text-shadow:none}
.shapes.opts{display:grid;grid-template-columns:1fr 1fr;grid-auto-rows:minmax(110px,1fr)}
.shapes.opts.n2,.shapes.opts.n1{grid-template-columns:1fr}
.shapes.opts .shp{min-height:0;font-size:clamp(17px,4.6vw,24px);line-height:1.2;overflow:hidden}
.shapes.opts .shp svg{width:min(14vh,26vw);height:min(14vh,26vw)}
.shapes.opts.n5,.shapes.opts.n6{gap:10px}
.shapes.opts.n5 .shp svg,.shapes.opts.n6 .shp svg{width:min(9vh,20vw);height:min(9vh,20vw)}
.shp .ol{display:block;max-height:3.6em;overflow:hidden;padding:0 4px;word-break:break-word}
.shp.pk::after{content:"✔";position:absolute;top:6px;right:10px;font-size:30px;color:#fff;text-shadow:2px 2px 0 var(--ink),-1px -1px 0 var(--ink),2px -1px 0 var(--ink),-1px 2px 0 var(--ink)}
.shp.pk{transform:scale(.97)}
.sendb{margin-top:12px;font-size:28px;padding:12px}
.ans-form{text-align:left}
.ans-form input,.ans-form textarea{margin:6px 0;font-size:20px}
.ans-form textarea{min-height:110px;font-family:inherit}
.thanks{text-align:center;font-size:26px;margin:10px 0}
.slidebox .qt{font-size:30px}
.slidebox .bd{font-size:21px;text-align:left;margin-top:10px}

/* màn chiếu: đám mây từ, ghi chú, slide, tùy chọn */
.tiles.nopt{grid-template-columns:1fr 1fr}
.tiles.nopt .tile{justify-content:flex-start;padding:clamp(8px,1.6vh,20px) clamp(14px,2vw,28px);font-size:clamp(18px,min(2.4vw,4.2vh),40px);text-align:left}
.tiles.nopt .tile.dk{color:var(--ink)}.tiles.nopt .tile.dk span{text-shadow:none}
.tiles .tile.o::before{background:var(--bg)}
.cloudbox{min-height:clamp(200px,40vh,520px);display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:clamp(6px,1.4vh,18px) clamp(14px,2.4vw,40px);padding:clamp(8px,2vh,24px);line-height:1}
.cw{display:inline-block;white-space:nowrap;transform:rotate(var(--r,0deg))}
.cw.new{animation:pop .6s ease-out}
.notes{display:grid;grid-template-columns:repeat(auto-fill,minmax(clamp(180px,20vw,320px),1fr));gap:clamp(10px,1.6vw,22px);padding:8px}
.note{padding:12px 14px;font-size:clamp(16px,1.9vw,28px);line-height:1.25;border:3px solid var(--ink);border-radius:4px;box-shadow:5px 5px 0 var(--shadow);transform:rotate(var(--r,0deg));word-break:break-word}
.note.new{animation:pop .6s ease-out}
.slide{padding:clamp(18px,4vh,48px) clamp(20px,4vw,60px);text-align:left}
.slide h1{font-size:clamp(34px,min(5.4vw,9vh),90px);line-height:1.1;margin:0 0 .4em}
.slide .bd{font-size:clamp(22px,min(3vw,5.4vh),54px);line-height:1.35;white-space:pre-line}
.slide .bd + .bd{color:var(--mute);margin-top:.6em;font-size:.8em}
.slide .tag{display:inline-block;font-size:clamp(16px,1.8vw,26px);color:var(--mute);margin-bottom:6px}
.miniring{display:flex;align-items:center;justify-content:center;gap:clamp(18px,3vw,50px);margin:6px 0}
.miniring .ring{width:clamp(84px,min(10vw,14vh),150px)}
.cbar.o .cb{background-color:var(--c)}
.cbar.o .cl{flex-direction:column;gap:4px;font-size:clamp(14px,1.8vw,26px);text-align:center;max-width:100%}
.cbar.o .cl span{display:block;max-width:100%;overflow:hidden;text-overflow:ellipsis;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}
.cbar.o .cl svg{width:1.6em;height:1.6em}
.ring[hidden]{display:none}
.tiles.nopt .tile svg{width:clamp(34px,min(4.4vw,7vh),80px);height:clamp(34px,min(4.4vw,7vh),80px);flex:none}
.tiles.nopt{gap:clamp(10px,1.6vw,22px)}
.miniring .ring b{font-size:clamp(26px,min(4vw,6.5vh),60px)}

tr.off td{opacity:.45}
.adm{display:inline-block;margin-left:8px;padding:2px 12px;border:2.5px solid var(--ink,#222);border-radius:14px 10px 16px 9px;background:#fff;color:inherit;text-decoration:none;font-size:clamp(14px,1.3vw,19px)}
.adm:hover{background:#F7D84A}

.daytag{display:inline-block;margin:0 auto 6px;padding:2px 22px;border:3px solid var(--ink,#222);border-radius:14px 9px 15px 8px;background:#F7D84A;font-size:clamp(20px,2.4vw,34px)}
.cloudbox,.notes{}

/* ---- Trang chủ giảng viên + responsive điện thoại ---- */
.homehead{display:flex;align-items:center;justify-content:space-between;gap:12px 16px;flex-wrap:wrap;margin-bottom:18px}
.homehead h2{font-size:28px;margin:0}
.homebtns{display:flex;gap:12px;flex-wrap:wrap}
.scard{padding:16px 18px}
.stitle{font-size:21px;line-height:1.25;margin-bottom:6px;overflow-wrap:anywhere}
.smeta{display:flex;flex-wrap:wrap;gap:4px 14px;color:var(--mute);font-size:15px;margin-bottom:12px}
.scode{font-weight:700;color:var(--ink);letter-spacing:1px;background:var(--yel);padding:0 8px;border-radius:6px}
.sact{display:flex;gap:10px;flex-wrap:wrap}
.sact .danger{margin-left:auto}
#who{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;min-width:0}
@media(max-width:640px){
  header.top{flex-wrap:wrap;gap:8px 10px;padding:12px 14px 2px}
  header.top>div:first-child{flex:1 1 100%;display:flex;align-items:center;gap:10px}
  header.top .grow{display:none}
  .banner{padding:4px 16px}
  .banner span{font-size:19px;white-space:nowrap;letter-spacing:1px}
  header.top>div:first-child .wm{margin:0!important}
  header.top #hl,header.top #who,header.top #out,header.top #pwa{font-size:15px}
  header.top #hl select,header.top select{padding:4px 8px}
  header.top #who{flex:1 1 0;text-align:right}
  main{padding:12px}
  .homehead h2{font-size:26px;flex:1 1 100%}
  .homebtns{flex:1 1 100%}
  .homebtns button{flex:1 1 auto}
  .stitle{font-size:19px}
  .sact button{flex:1 1 auto}
  .sact .danger{flex:0 0 auto;margin-left:auto}
  .card{padding:14px}
}