/* Giao diện CVTECH ACADEMY */
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font);font-size:16px;line-height:1.55;-webkit-tap-highlight-color:transparent;overscroll-behavior-y:none}
button{font:inherit;color:inherit;cursor:pointer}
a{color:var(--pri-d)}
h1,h2,h3{line-height:1.25;margin:0;text-wrap:balance}
p{margin:0 0 .8em}
:focus-visible{outline:3px solid color-mix(in srgb,var(--pri) 55%,#fff);outline-offset:2px;border-radius:6px}
[hidden]{display:none!important}

/* ---- khung app */
#app{min-height:100dvh;display:flex;flex-direction:column}
.top{position:sticky;top:0;z-index:30;background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border-bottom:1px solid var(--line);padding-top:env(safe-area-inset-top)}
.top-in{max-width:880px;margin:0 auto;display:flex;align-items:center;gap:6px;min-height:52px;padding:0 10px}
.top h1{font-size:16.5px;font-weight:700;flex:1;min-width:0;overflow:hidden;padding:5px 0}
.top h1 .tt{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;line-height:1.22;text-wrap:balance}
.top .sub{font-size:12px;color:var(--muted);font-weight:500;display:block;margin-top:1px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.ib{width:44px;height:44px;border:0;background:none;border-radius:12px;display:grid;place-items:center;flex:none}
.ib:active{background:var(--soft)}
.ib svg{width:24px;height:24px;stroke:currentColor;fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.brand{display:flex;align-items:center;gap:10px;flex:1;min-width:0}
.brand img{width:auto;height:34px;max-width:72px;flex:none}
.auth-logo{display:block;margin:0 auto 10px;width:150px;height:auto;max-width:60%}
.brand b{font-size:16px;letter-spacing:.02em}
.brand>div{min-width:0;padding-left:10px;border-left:1px solid var(--line)}
.brand b{white-space:nowrap}
.brand span{display:block;font-size:11.5px;color:var(--muted);font-weight:500;margin-top:-2px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
@media(max-width:460px){.brand span{font-size:10.5px;letter-spacing:-.01em}}
main#view{flex:1;width:100%;max-width:880px;margin:0 auto;padding:14px 14px calc(88px + env(safe-area-inset-bottom))}
.tabs{position:fixed;left:0;right:0;bottom:0;z-index:40;background:var(--card);border-top:1px solid var(--line);display:flex;justify-content:space-around;padding:4px 4px calc(4px + env(safe-area-inset-bottom))}
.tabs a{flex:1;max-width:120px;min-height:52px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;text-decoration:none;color:var(--muted);font-size:11.5px;font-weight:600;border-radius:12px}
.tabs a svg{width:24px;height:24px;stroke:currentColor;fill:none;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round}
.tabs a.on{color:var(--pri-d)}
.tabs a.on svg{stroke-width:2.3}
@media(min-width:900px){
  .tabs{top:0;bottom:0;right:auto;width:92px;flex-direction:column;justify-content:flex-start;gap:6px;border-top:0;border-right:1px solid var(--line);padding:70px 8px 8px}
  .tabs a{flex:none;max-width:none;width:100%;min-height:64px}
  #app{padding-left:92px}
  main#view{padding-bottom:40px}
}

/* ---- khối chung */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:14px;box-shadow:var(--shadow)}
.sec-t{font-size:13px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--muted);margin:22px 2px 8px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;padding:0 18px;border-radius:12px;border:1px solid var(--line);background:var(--card);font-weight:650;font-size:15px;text-decoration:none;color:var(--ink)}
.btn:active{transform:translateY(1px)}
.btn.pri{background:var(--pri);border-color:var(--pri);color:#fff}
.btn.acc{background:var(--acc);border-color:var(--acc);color:#fff}
.btn.ghost{background:transparent}
.btn.sm{min-height:40px;padding:0 12px;font-size:14px}
.btn.block{display:flex;width:100%}
.btn[disabled]{opacity:.5;pointer-events:none}
.row{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.row.end{justify-content:flex-end}
.grow{flex:1;min-width:0}
.muted{color:var(--muted)}
.small{font-size:13.5px}
.pill{display:inline-flex;align-items:center;gap:4px;font-size:12px;font-weight:700;padding:2px 9px;border-radius:999px;background:var(--soft);color:var(--muted);white-space:nowrap}
.pill.ok{background:var(--ok-l);color:var(--ok)} .pill.acc{background:var(--acc-l);color:var(--acc)} .pill.blue{background:var(--blue-l);color:var(--blue)} .pill.warn{background:var(--warn-l);color:var(--warn)}
.bar{height:7px;border-radius:99px;background:var(--soft);overflow:hidden}
.bar i{display:block;height:100%;background:var(--pri);border-radius:99px;transition:width .4s}
.list{display:flex;flex-direction:column;gap:8px}
.item{display:flex;align-items:center;gap:12px;background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:12px 12px;text-decoration:none;color:inherit;min-height:60px}
.item:active{background:var(--soft)}
.item .n{width:36px;height:36px;border-radius:10px;background:var(--pri-l);color:var(--pri-d);display:grid;place-items:center;font-weight:800;font-size:14px;flex:none}
.item .n.done{background:var(--pri);color:#fff}
.item .n svg{width:20px;height:20px;stroke:currentColor;fill:none;stroke-width:2.4;stroke-linecap:round;stroke-linejoin:round}
.item b{display:block;font-size:15px;line-height:1.3}
.item small{display:block;color:var(--muted);font-size:12.5px;margin-top:2px}
.item .chev{color:var(--light,#9ca3af);flex:none}
.item .thumb{width:76px;height:60px;flex:none;display:grid;place-items:center;background:var(--paper);border:1px solid var(--line);border-radius:10px;overflow:hidden}
.item .thumb svg{max-width:68px;max-height:54px;width:auto;height:auto}
.empty{text-align:center;color:var(--muted);padding:30px 10px}

/* ---- trang chủ */
.hero{position:relative;overflow:hidden;border-radius:20px;padding:18px 16px 16px;color:#fff;background:linear-gradient(135deg,#0b5c2c,#12813f 55%,#1a9a4c);box-shadow:var(--shadow)}
.hero::before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.09) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.09) 1px,transparent 1px);background-size:22px 22px;mask-image:linear-gradient(120deg,transparent 30%,#000);-webkit-mask-image:linear-gradient(120deg,transparent 30%,#000)}
.hero>*{position:relative}
.hero h2{font-size:21px;font-weight:800}
.hero p{opacity:.92;font-size:14px;margin:4px 0 12px;max-width:34em}
.hero .ring{float:right;margin:0 0 6px 10px}
.hero .btn{background:#fff;border-color:#fff;color:var(--pri-d)}
.ring{position:relative;width:74px;height:74px}
.ring svg{width:100%;height:100%;transform:rotate(-90deg)}
.ring b{position:absolute;inset:0;display:grid;place-items:center;font-size:17px;font-weight:800}
.grid2{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
@media(min-width:620px){.grid2{grid-template-columns:repeat(3,1fr)}}
.tile{display:flex;flex-direction:column;gap:6px;background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:13px 12px;text-decoration:none;color:inherit;min-height:112px;box-shadow:var(--shadow)}
.tile:active{background:var(--soft)}
.tile .ic{width:40px;height:40px;border-radius:11px;display:grid;place-items:center;background:var(--pri-l);color:var(--pri-d)}
.tile .ic svg{width:23px;height:23px;stroke:currentColor;fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.tile.t2 .ic{background:var(--acc-l);color:var(--acc)} .tile.t3 .ic{background:var(--blue-l);color:var(--blue)} .tile.t4 .ic{background:var(--warn-l);color:var(--warn)}
.tile b{font-size:15px;line-height:1.25}
.tile small{color:var(--muted);font-size:12.5px;line-height:1.35}
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-top:10px}
.stat{background:var(--card);border:1px solid var(--line);border-radius:var(--r-s);padding:10px 8px;text-align:center}
.stat b{display:block;font-size:20px;font-weight:800;color:var(--pri-d)}
.stat span{font-size:12px;color:var(--muted)}
.install{display:flex;gap:12px;align-items:center;margin-top:12px;border-style:dashed}

/* ---- chương, bài học */
.ch-head{display:flex;gap:12px;align-items:flex-start;margin-bottom:6px}
.ch-num{width:46px;height:46px;border-radius:13px;background:var(--pri);color:#fff;display:grid;place-items:center;font-weight:800;font-size:19px;flex:none}
.ch-head h2{font-size:19px}
.lesson{font-size:16.5px}
.lesson h2{font-size:22px;margin:4px 0 6px}
.lesson h3{font-size:17.5px;margin:22px 0 8px;padding-left:10px;border-left:4px solid var(--pri)}
.lesson ul,.lesson ol{margin:0 0 .9em;padding-left:22px}
.lesson li{margin:.25em 0}
.goals{background:var(--pri-l);border-radius:var(--r);padding:12px 14px;margin:10px 0 16px}
.goals>b{font-size:13px;letter-spacing:.05em;text-transform:uppercase;color:var(--pri-d)}
.goals ul{margin:6px 0 0;padding-left:20px}
figure.fig-box{margin:14px 0;background:var(--paper);border:1px solid var(--line);border-radius:var(--r);overflow:hidden}
.fig-in{display:flex;justify-content:center;align-items:center;flex-wrap:wrap;gap:6px 14px;padding:10px 8px;overflow-x:auto;position:relative}
.fig-in svg.fig{max-width:100%;height:auto;flex:none}
.fig-in.wide{justify-content:flex-start}
.fig-in.wide svg.fig{max-width:none}
.fig-in img{max-width:100%;height:auto;display:block}
.fig-box figcaption{font-size:13.5px;color:var(--muted);text-align:center;padding:8px 12px 10px;border-top:1px solid var(--line);background:#fafbfa}
.zoom-btn{position:absolute;bottom:4px;right:4px;width:30px;height:30px;border-radius:9px;border:1px solid var(--line);background:rgba(255,255,255,.85);display:grid;place-items:center;opacity:.8}
.zoom-btn svg{width:16px;height:16px;stroke:var(--muted);fill:none;stroke-width:2;stroke-linecap:round}
.note{border-radius:var(--r);padding:11px 13px 11px 14px;margin:14px 0;border-left:4px solid var(--blue);background:var(--blue-l);font-size:15.5px}
.note b.k{display:block;font-size:12px;letter-spacing:.06em;text-transform:uppercase;margin-bottom:3px;color:var(--blue)}
.note.warn{border-color:var(--acc);background:var(--acc-l)} .note.warn b.k{color:var(--acc)}
.note.tip{border-color:var(--pri);background:var(--pri-l)} .note.tip b.k{color:var(--pri-d)}
.ex{border:1px solid var(--line);border-radius:var(--r);background:var(--card);margin:16px 0;overflow:hidden}
.ex>header{background:var(--soft);padding:9px 13px;font-weight:700;font-size:15px}
.ex>div{padding:10px 13px 4px}
.ex figure.fig-box{border-radius:var(--r-s)}
.tbl-wrap{overflow-x:auto;margin:14px 0;border:1px solid var(--line);border-radius:var(--r);background:var(--card)}
table.tbl{border-collapse:collapse;width:100%;font-size:14.5px}
.tbl th,.tbl td{padding:8px 10px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
.tbl th{background:var(--soft);font-size:13.5px;white-space:nowrap}
.tbl tr:last-child td{border-bottom:0}
.tbl-cap{font-size:13.5px;color:var(--muted);text-align:center;padding:8px;border-top:1px solid var(--line)}
code{font-family:ui-monospace,Menlo,Consolas,monospace;font-size:.92em;background:var(--soft);padding:1px 5px;border-radius:5px}
.figmiss{color:var(--bad);font-size:13px;padding:10px}
.next-bar{display:flex;gap:10px;margin-top:22px}
.next-bar .btn{flex:1}

/* ---- câu hỏi */
.q{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:14px 13px;margin:12px 0}
.q-n{font-size:12px;font-weight:800;letter-spacing:.06em;color:var(--muted);text-transform:uppercase}
.q-t{font-size:16.5px;font-weight:600;margin:4px 0 10px;line-height:1.45}
.q-fig{margin:6px 0 12px;background:var(--paper);border:1px solid var(--line);border-radius:var(--r-s);position:relative}
.opts{display:grid;gap:8px}
.opts.figs{grid-template-columns:repeat(2,1fr)}
.opt{display:flex;align-items:center;gap:10px;text-align:left;width:100%;min-height:50px;padding:10px 12px;border:1.5px solid var(--line);border-radius:12px;background:var(--card);font-size:15.5px;line-height:1.4}
.opt .mk{width:26px;height:26px;border-radius:50%;border:1.5px solid var(--line);display:grid;place-items:center;font-size:12.5px;font-weight:800;color:var(--muted);flex:none}
.opt.sq .mk{border-radius:7px}
.opts.figs .opt{flex-direction:column;align-items:stretch;padding:8px;gap:6px}
.opts.figs .opt .mk{align-self:flex-start}
.opt .of{display:grid;place-items:center;min-height:84px;overflow:hidden}
.opt .of svg{max-width:100%;height:auto;max-height:150px}
.opt.sel{border-color:var(--pri);background:var(--pri-l)} .opt.sel .mk{background:var(--pri);border-color:var(--pri);color:#fff}
.opt.right{border-color:var(--ok);background:var(--ok-l)} .opt.right .mk{background:var(--ok);border-color:var(--ok);color:#fff}
.opt.wrong{border-color:var(--bad);background:var(--bad-l)} .opt.wrong .mk{background:var(--bad);border-color:var(--bad);color:#fff}
.q.locked .opt{pointer-events:none}
.q-num{display:flex;gap:8px;align-items:center}
.q-num input{flex:1;min-width:0;height:48px;border:1.5px solid var(--line);border-radius:12px;padding:0 12px;font:inherit;font-size:17px;background:var(--card);color:var(--ink)}
.q-num input.right{border-color:var(--ok);background:var(--ok-l)} .q-num input.wrong{border-color:var(--bad);background:var(--bad-l)}
.q-why{margin-top:10px;padding:10px 12px;border-radius:12px;font-size:15px;background:var(--soft)}
.q-why b{display:block;margin-bottom:2px}
.q-why.ok b{color:var(--ok)} .q-why.bad b{color:var(--bad)}
.q-act{margin-top:10px}
.quiz-top{display:flex;align-items:center;gap:10px;margin-bottom:10px;font-size:14px;font-weight:700;color:var(--muted)}
.quiz-top .bar{flex:1}
.timer{font-variant-numeric:tabular-nums;font-weight:800;color:var(--ink);background:var(--card);border:1px solid var(--line);padding:3px 10px;border-radius:999px}
.timer.low{color:var(--bad);border-color:var(--bad)}
.result{text-align:center;padding:22px 14px}
.result .big{font-size:46px;font-weight:800;line-height:1;color:var(--pri-d)}
.result .big.bad{color:var(--acc)}
.result h2{margin:8px 0 6px;font-size:20px}
.qnav{display:flex;flex-wrap:wrap;gap:6px;margin:10px 0}
.qnav button{width:40px;height:40px;border-radius:10px;border:1.5px solid var(--line);background:var(--card);font-weight:700;font-size:13.5px}
.qnav button.ans{background:var(--pri-l);border-color:var(--pri)} .qnav button.cur{outline:3px solid color-mix(in srgb,var(--pri) 45%,#fff)}
.qnav button.r{background:var(--ok-l);border-color:var(--ok)} .qnav button.w{background:var(--bad-l);border-color:var(--bad)}

/* ---- bài tập vẽ */
.brief{font-size:15.5px}
.ref{background:var(--paper);border:1px solid var(--line);border-radius:var(--r);margin:10px 0;position:relative}
.ref .fig-in{padding:8px}
.ref-cap{font-size:13px;color:var(--muted);text-align:center;padding:6px 10px 8px;border-top:1px solid var(--line)}
.board-host{margin:10px -6px 0}
@media(min-width:620px){.board-host{margin:10px 0 0}}
.verdict{border-radius:var(--r);padding:12px 14px;margin:12px 0;border:1.5px solid var(--line);background:var(--card)}
.verdict.ok{border-color:var(--ok);background:var(--ok-l)} .verdict.bad{border-color:var(--acc);background:var(--acc-l)}
.verdict h3{font-size:17px;margin-bottom:4px}
.verdict ul{margin:6px 0 0;padding-left:20px;font-size:15px}
.steps-help{font-size:14px;color:var(--muted);margin:8px 0 0}
.steps-help summary{cursor:pointer;font-weight:650;color:var(--ink);min-height:36px;display:flex;align-items:center}
.check{display:flex;gap:10px;align-items:flex-start;padding:10px 4px;border-bottom:1px solid var(--line);font-size:15.5px}
.check:last-child{border-bottom:0}
.check input{width:22px;height:22px;margin-top:2px;accent-color:var(--pri);flex:none}
.chips{display:flex;gap:6px;overflow-x:auto;padding:2px 0 8px;scrollbar-width:none}
.chips::-webkit-scrollbar{display:none}
.chip{flex:none;min-height:40px;padding:0 14px;border-radius:999px;border:1.5px solid var(--line);background:var(--card);font-weight:650;font-size:14px;white-space:nowrap}
.chip.on{background:var(--ink);border-color:var(--ink);color:#fff}

/* ---- khung xem bản vẽ, phóng to */
.pz{position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--r);overflow:hidden;touch-action:none;height:min(58vh,520px);cursor:grab}
.pz-in{position:absolute;left:0;top:0;transform-origin:0 0;will-change:transform}
.pz-in img,.pz-in svg{display:block;max-width:none}
.pz-ctl{position:absolute;right:8px;bottom:8px;display:flex;gap:6px}
.pz-ctl button{width:42px;height:42px;border-radius:12px;border:1px solid var(--line);background:rgba(255,255,255,.95);font-size:20px;font-weight:700;display:grid;place-items:center}
.modal{position:fixed;inset:0;z-index:100;background:rgba(15,23,42,.72);display:flex;flex-direction:column;padding:calc(8px + env(safe-area-inset-top)) 8px calc(8px + env(safe-area-inset-bottom))}
.modal .pz{flex:1;height:auto;border-radius:14px}
.modal-x{align-self:flex-end;margin-bottom:8px;background:#fff;border:0;border-radius:12px;min-height:44px;padding:0 16px;font-weight:700}
.dlg{position:fixed;inset:0;z-index:120;background:rgba(15,23,42,.5);display:grid;place-items:center;padding:20px}
.dlg-box{background:var(--card);border-radius:18px;padding:18px;max-width:380px;width:100%}
.dlg-box h3{font-size:18px;margin-bottom:6px}
.toast{position:fixed;left:50%;bottom:calc(96px + env(safe-area-inset-bottom));transform:translateX(-50%);z-index:150;background:var(--ink);color:#fff;padding:10px 16px;border-radius:12px;font-size:14.5px;font-weight:600;max-width:calc(100vw - 32px);box-shadow:0 8px 30px rgba(0,0,0,.25)}

/* ---- tài khoản */
.field{display:block;margin:10px 0}
.field span{display:block;font-size:13.5px;font-weight:650;margin-bottom:4px}
.field input:not([type=checkbox]):not([type=radio]){width:100%;height:48px;border:1.5px solid var(--line);border-radius:12px;padding:0 12px;font:inherit;background:var(--card);color:var(--ink)}
.err{color:var(--bad);font-size:14px;margin:8px 0 0;min-height:1.2em}
.avatar{width:52px;height:52px;border-radius:50%;background:var(--pri);color:#fff;display:grid;place-items:center;font-weight:800;font-size:21px;flex:none;overflow:hidden}
.avatar img{width:100%;height:100%;object-fit:cover}
.kv{display:flex;justify-content:space-between;gap:10px;padding:9px 0;border-bottom:1px solid var(--line);font-size:15px}
.kv:last-child{border-bottom:0}
.loading{display:grid;place-items:center;padding:60px 0;color:var(--muted)}
.spin{width:30px;height:30px;border:3px solid var(--line);border-top-color:var(--pri);border-radius:50%;animation:sp 0.8s linear infinite;margin-bottom:10px}
@keyframes sp{to{transform:rotate(360deg)}}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto!important}}

/* ================= mở rộng 10/2026: 5 tab, mô-đun mới, công cụ, bảng tra */
.tabs a{padding:0 2px;text-align:center}
.tabs a span{line-height:1.15;display:block;max-width:100%;text-wrap:balance}
@media(max-width:899px){.tabs a{font-size:10.5px;min-height:56px;gap:3px}.tabs a svg{width:23px;height:23px}}
@media(max-width:350px){.tabs a{font-size:9.8px}}
.hero.m-ds{background:linear-gradient(135deg,#123a7a,#1d4ed8 60%,#3b6ef0)}
.hero.m-phay{background:linear-gradient(135deg,#7a2a12,#c2410c 60%,#e2622a)}
.hero.m-tien{background:linear-gradient(135deg,#0b4f55,#0f766e 60%,#18988c)}
.hero.m-phlt{background:linear-gradient(135deg,#2b2a78,#4338ca 60%,#6366f1)}
.hero.m-ds .btn{color:#123a7a}.hero.m-phay .btn{color:#7a2a12}.hero.m-tien .btn{color:#0b4f55}.hero.m-phlt .btn{color:#2b2a78}
.contact{margin-top:26px;border-radius:var(--r);padding:14px;background:linear-gradient(135deg,#0b5c2c,#12813f);color:#fff;box-shadow:var(--shadow)}
.contact b{display:block;font-size:15px;line-height:1.35}
.contact p{margin:6px 0 0;font-size:13.5px;opacity:.95}
.contact .ct-l{font-weight:700;margin:10px 0 6px;font-size:12px;letter-spacing:.06em;text-transform:uppercase;opacity:.9}
.contact .btn{background:#fff;border-color:#fff;color:var(--pri-d);font-size:15.5px;letter-spacing:.02em}
.code-box{margin:14px 0;border:1px solid #1f2937;border-radius:var(--r);background:#0f172a;overflow-x:auto}
table.code{border-collapse:collapse;width:100%;font-size:14px}
.code tr{display:block;padding:6px 12px;border-bottom:1px solid rgba(255,255,255,.08)}
.code tr:last-child{border-bottom:0}
.code td{display:block;padding:0;color:#aab6c8;line-height:1.4;font-size:13.5px}
.code td:empty{display:none}
.code td:first-child code{background:none;padding:0;color:#fde68a;font-size:14.5px;font-weight:600;white-space:pre-wrap;word-break:break-word}
.code td:last-child code{background:rgba(255,255,255,.1);color:#bfdbfe}
@media(min-width:620px){.code tr{display:table-row;padding:0}.code td{display:table-cell;padding:6px 12px;vertical-align:top;border-bottom:1px solid rgba(255,255,255,.08);font-size:14px}.code tr:last-child td{border-bottom:0}.code td:first-child{white-space:nowrap;width:1%}.code td:first-child code{white-space:pre}}
.code-box .tbl-cap{color:#94a3b8;border-top-color:rgba(255,255,255,.12)}
.formula{margin:14px 0;padding:12px 14px;border-radius:var(--r);background:var(--card);border:1.5px solid var(--pri);text-align:center}
.formula .f{font-size:18.5px;font-weight:700;font-family:Georgia,"Times New Roman",serif;line-height:1.5;overflow-x:auto}
.formula .fn{font-size:13.5px;color:var(--muted);margin-top:4px}
video.vid{display:block;width:100%;height:auto;background:#fff}
.item.link-b{margin:12px 0;border-color:var(--pri);background:var(--pri-l)}
.item.link-b .n{background:var(--pri);color:#fff}
.item.link-b .n svg,.item .n svg{fill:none}
.wg-box{overflow:visible}
.wg-box .wg{padding:10px 8px}
.wg-page{margin-bottom:6px}
.lesson.extra{font-size:15.5px}
.lesson svg[style*="vertical-align"]{flex:none}
.tbl td svg,.q-t svg,.opt svg{max-width:100%}
table.tbl.ref{font-size:14px}
.tbl.ref td.k0{font-weight:700;white-space:nowrap;color:var(--pri-d)}
.tbl.ref td.k0 code{background:none;padding:0}
.ref-find{margin:6px 0 4px}
details.prog>summary{display:flex;align-items:center;gap:12px;cursor:pointer;list-style:none}
details.prog>summary::-webkit-details-marker{display:none}
details.prog .n{width:36px;height:36px;border-radius:10px;background:var(--pri-l);color:var(--pri-d);display:grid;place-items:center;flex:none}
details.prog .n svg{width:20px;height:20px;stroke:currentColor;fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
details.prog small{display:block;color:var(--muted);font-size:12.5px;margin-top:4px}
.dk-row{padding:10px 0;border-top:1px solid var(--line)}
.dk-row:first-of-type{border-top:0;padding-top:0}
.dk-h{display:flex;gap:10px;align-items:flex-start}
.dk-k{width:32px;height:32px;border-radius:9px;background:var(--blue-l);color:var(--blue);display:grid;place-items:center;font-weight:800;flex:none}
.dk-h b{display:block;font-size:14.5px;line-height:1.35}
.dk-h small{display:block;color:var(--muted);font-size:12.5px;margin-top:2px}
.dk-in{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-top:8px;align-items:end}
.dk-in label span{display:block;font-size:11.5px;font-weight:700;color:var(--muted);text-transform:uppercase;letter-spacing:.04em;margin-bottom:3px}
.dk-in input{width:100%;min-height:44px;border:1.5px solid var(--line);border-radius:10px;padding:0 10px;font:inherit;font-size:16px;background:var(--card);color:var(--ink)}
.dk-in input:focus{border-color:var(--pri);outline:none}
.dk-in .pill{grid-column:1/-1;justify-self:start;white-space:normal}
.dk-sum{margin-top:10px;padding:9px 11px;border-radius:10px;background:var(--soft);font-size:14px}

/* ---- nút phóng to nằm trên dải chú thích, không che góc hình */
figure.fig-box{position:relative}
figure.fig-box>.fig-in,.ref>.fig-in{position:static}
figure.fig-box:has(.zoom-btn) figcaption,.ref:has(.zoom-btn) .ref-cap{padding-left:40px;padding-right:40px}
figure.fig-box:has(figcaption) .zoom-btn,.ref:has(.ref-cap) .zoom-btn{background:#fff;opacity:1}
@media(max-width:480px){.tbl.ref th,.tbl.ref td{padding:7px 7px}.tbl.ref th{white-space:normal}}

/* ---- nhóm VIP: khoá, khung mở khoá */
.pill.vip{background:#fff4d6;color:#8a5a00;border:1px solid #f0d48a;letter-spacing:.04em}
.item .n.lock{background:var(--soft);color:var(--muted)}
.item.locked b{color:#334155}
.item.vip-on{border-color:#f0d48a;background:#fffaf0}
.item.vip-on .n{background:#fff4d6;color:#8a5a00}
.tile{position:relative}
.tile .pill.vip{position:absolute;top:10px;right:10px}
.tile.locked .ic{filter:grayscale(.7);opacity:.75}
.paywall{background:var(--card);border:1px solid #f0d48a;border-radius:var(--r);padding:20px 16px 16px;text-align:center;box-shadow:var(--shadow)}
.paywall h2{font-size:19px;margin:10px 0 6px}
.paywall p{margin:0 0 12px;color:#334155}
.pw-ic{display:inline-grid;place-items:center;width:54px;height:54px;border-radius:16px;background:#fff4d6;color:#8a5a00}
.pw-ic svg{width:28px;height:28px;stroke:currentColor;fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.pw-goals{text-align:left;background:var(--soft);border-radius:var(--r-s);padding:10px 12px;margin:0 0 14px;font-size:14.5px}
.pw-goals b{font-size:12px;letter-spacing:.06em;text-transform:uppercase;color:var(--muted)}
.pw-goals ul,.pw-list{margin:6px 0 0;padding-left:20px}
.pw-list li{margin:.3em 0}
.vip-hero{border-radius:20px;padding:18px 16px;color:#3f2a00;background:linear-gradient(135deg,#ffe9a8,#ffd66b 60%,#f5b93c);box-shadow:var(--shadow)}
.vip-hero h2{font-size:19px;margin:10px 0 4px}
.vip-hero .pw-ic{background:rgba(255,255,255,.6);color:#6b4500}
.vip-hero .pw-list{font-size:14.5px}
.vip-hero.ok{background:linear-gradient(135deg,#0b5c2c,#12813f 55%,#1a9a4c);color:#fff}
.vip-hero.ok .pw-ic{background:rgba(255,255,255,.18);color:#fff}
.inp{min-height:46px;border:1.5px solid var(--line);border-radius:12px;padding:0 12px;font:inherit;font-size:16px;background:#fff;min-width:0;text-transform:uppercase;letter-spacing:.04em}
.inp::placeholder{text-transform:none;letter-spacing:0}

/* ---- bảo vệ nội dung */
html.guard body{-webkit-user-select:none;user-select:none;-webkit-touch-callout:none}
html.guard input,html.guard textarea,html.guard select,html.guard [contenteditable="true"],html.guard .allow-copy{-webkit-user-select:text;user-select:text}
html.guard img,html.guard svg{-webkit-user-drag:none;user-drag:none;-webkit-touch-callout:none}
.wm{position:fixed;inset:0;z-index:130;pointer-events:none;background-repeat:repeat}
html.shield #view,html.shield .modal,html.shield .dlg{filter:blur(18px) saturate(.6);transition:filter .08s}
html.shield body::after{content:"Chạm vào màn hình để xem tiếp";position:fixed;inset:0;z-index:140;display:grid;place-items:center;background:rgba(243,245,241,.55);color:var(--ink);font-weight:700;font-size:16px;pointer-events:none}
@media print{html:not(.print-ok) #app,html:not(.print-ok) .modal,html:not(.print-ok) .dlg,.wm{display:none!important}html:not(.print-ok) body::before{content:"Nội dung thuộc bản quyền Công ty TNHH Đào tạo và Công nghệ CVTECH Việt Nam x Thầy Quyết Hướng Nghiệp. App không hỗ trợ in.";display:block;padding:40px;font:600 16px system-ui,sans-serif}}

/* ================= bản 3.0: trang chủ tổng quan, danh sách khóa, hồ sơ học viên, mở khoá học, bài kiểm tra, lớp */
.hello{font-size:20px;font-weight:800;margin:2px 2px 10px}
.hero-k{display:block;font-size:11.5px;font-weight:700;letter-spacing:.07em;text-transform:uppercase;opacity:.85;margin-bottom:3px}
.hero.intro h2{font-size:20px;line-height:1.3}
.hero.intro .row{gap:8px}
.hero .btn.line{background:transparent;border-color:rgba(255,255,255,.75);color:#fff}
.hero .row .btn{flex:1 1 auto}
.item.crs small+small{margin-top:3px}
.item.crs .pill,.item.cls .pill{flex:none}
.item.warn-i{border-color:#f0d48a;background:#fffaf0}
.item.warn-i .n{background:#fff4d6;color:#8a5a00}
.item .n svg{stroke-width:2}
.course{padding:0;overflow:hidden}
.course .c-main{display:flex;align-items:flex-start;gap:12px;padding:14px 12px 10px 14px;text-decoration:none;color:inherit;min-height:60px}
.course .c-main:active{background:var(--soft)}
.course .c-main b{display:block;font-size:16.5px;line-height:1.3}
.course .c-main small{display:block;color:var(--muted);font-size:13px;line-height:1.45;margin-top:3px}
.course .c-main .chev{color:#9ca3af;flex:none;margin-top:10px}
.c-ic{width:44px;height:44px;border-radius:12px;display:grid;place-items:center;flex:none;background:var(--pri-l);color:var(--pri-d)}
.c-ic svg{width:25px;height:25px;stroke:currentColor;fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.c-ic.m-ds,.item .n.m-ds{background:var(--blue-l);color:var(--blue)} .c-ic.m-phay,.item .n.m-phay{background:var(--acc-l);color:#c2410c} .c-ic.m-tien,.item .n.m-tien{background:#dff3f1;color:#0f766e} .c-ic.m-phlt,.item .n.m-phlt{background:#e6e5fb;color:#4338ca}
.course .c-prog{display:flex;align-items:center;gap:10px;padding:0 14px}
.course .c-prog .bar{flex:1}
.course .c-prog b{font-size:13px;font-weight:800;color:var(--pri-d);min-width:38px;text-align:right}
.course .c-meta{padding:6px 14px 0}
.course .c-foot{display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap;padding:10px 14px 12px;margin-top:10px;border-top:1px solid var(--line);background:#fafbfa}
.course .c-foot .btn{min-height:40px}
.auth-t{display:block;font-size:18px}
.okm{color:var(--ok);font-size:14px;margin:8px 0 0}
.field input[aria-invalid="true"],.field.bad input,.field.bad textarea,.field.bad select{border-color:var(--bad);background:var(--bad-l)}
.field textarea,.field select{width:100%;border:1.5px solid var(--line);border-radius:12px;padding:10px 12px;font:inherit;background:var(--card);color:var(--ink)}
.field textarea{min-height:92px;resize:vertical;line-height:1.45;display:block}
.field select{height:48px;padding:0 10px}
.field input:focus,.field textarea:focus,.field select:focus{border-color:var(--pri);outline:none}
.field input[type=date]{min-width:0;-webkit-appearance:none;appearance:none;display:block;line-height:44px}
.field .req{color:var(--acc);font-style:normal;font-weight:800}
.req{color:var(--acc);font-style:normal;font-weight:800}
.field .hint{display:block;color:var(--muted);font-size:12.5px;margin-top:4px}
.field .ferr{display:block;color:var(--bad);font-size:13px;margin-top:4px}
.field .ferr:empty{display:none}
.acct .mail-l{overflow-wrap:anywhere}
.note.verify{margin:12px 0 0;font-size:14.5px}
.note .btn.sm{background:#fff}
.note .btn.sm.pri{background:var(--pri)}
.pf-photo{display:flex;gap:14px;align-items:center;margin-bottom:12px}
.ph-box{width:84px;height:112px;border-radius:12px;border:1.5px dashed var(--line);background:var(--soft);display:grid;place-items:center;overflow:hidden;flex:none}
.ph-box img{width:100%;height:100%;object-fit:cover;display:block}
.ph-none svg{width:38px;height:38px;stroke:#9ca3af;fill:none;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
.ph-pick{cursor:pointer}
.ph-pick svg{width:18px;height:18px;stroke:currentColor;fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.pf-photo .bad{color:var(--bad)}
.pf-form .field:first-child{margin-top:0}
.check.agree{border:1.5px solid var(--line);border-radius:12px;padding:12px;margin:14px 0 4px;font-size:15px;line-height:1.45;cursor:pointer}
.pw-ic.ok{background:var(--pri-l);color:var(--pri-d)}
.paywall.pf-gate{border-color:var(--pri)}
.soon{text-align:center;padding:22px 16px 16px}
.soon h2{font-size:19px;margin:10px 0 8px}
.soon p{text-align:left}
.kt-facts{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin:12px 0 10px}
.kt-facts div{background:var(--soft);border-radius:var(--r-s);padding:9px 6px;text-align:center}
.kt-facts b{display:block;font-size:19px;font-weight:800;color:var(--pri-d)}
.kt-facts span{font-size:12px;color:var(--muted)}
.kt-rules{margin:0 0 14px;padding-left:20px}
.kt-rules li{margin:.35em 0}
.item.kt-row{border-color:var(--pri)}
.item.kt-row.locked{border-color:var(--line)}
.item.att{min-height:54px}
.item.att .n{width:44px;font-size:15px}
[data-rev].only-wrong .q.is-ok{display:none}
.result [data-extra]{margin-top:4px}
.cls-card .kv b{text-align:right;font-weight:650;min-width:0;overflow-wrap:anywhere}
.cls-card .kv span{color:var(--muted);flex:none}
.item.st{align-items:flex-start}
.item.st small{overflow-wrap:anywhere}
.pg{display:grid;grid-template-columns:minmax(0,auto) minmax(40px,1fr) 38px;gap:5px 8px;align-items:center;margin-top:8px}
.pg .pg-l{font-size:12px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:38vw}
.pg b{font-size:12px;font-weight:700;text-align:right;display:block}
.pg .bar{height:6px}
.tabs a[aria-current="page"]{color:var(--pri-d)}
select{font:inherit;color:inherit}
.crs-f{display:flex;align-items:center;justify-content:space-between;gap:4px 8px;flex-wrap:wrap;margin-top:5px}
.crs-f small{margin-top:0}
.sum .kv b{flex:none;white-space:nowrap}
.err:not(:empty){margin-bottom:10px}
.okm{margin-bottom:10px}
.item.cls small+small{margin-top:1px}
/* bài kiểm tra cuối môn: thẻ mời làm tiếp bài đang dở (sau khi lỡ tải lại trang) */
.kt-resume{margin-bottom:12px;border-color:color-mix(in srgb,var(--acc) 45%,var(--line));background:var(--acc-l)}
.kt-resume b{font-size:15.5px}
.kt-resume .btn.ghost{background:none}
.card.empty .row{flex-wrap:wrap;gap:8px}

/* ---- thông báo (bản 4.0, C3): chuông, thẻ trang chủ, trang #/tb, công tắc thông báo đẩy, soạn thông báo lớp */
.ib.bell{position:relative}
.ib .bell-n{position:absolute;top:4px;right:2px;min-width:19px;height:19px;padding:0 5px;border-radius:999px;background:var(--acc);color:#fff;font:700 11px/19px var(--font);font-style:normal;text-align:center;box-shadow:0 0 0 2px var(--bg)}
@media(max-width:460px){.top .brand span{white-space:normal;line-height:1.2;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}}
.tb-card{margin:10px 0 12px;padding:12px;border-color:color-mix(in srgb,var(--acc) 35%,var(--line))}
.tb-card-h{display:flex;align-items:center;gap:10px;margin-bottom:6px}
.tb-card-h .n{width:30px;height:30px;border-radius:9px;background:var(--acc-l);color:var(--acc);display:grid;place-items:center;flex:none}
.tb-card-h .n svg,.tb-push .n svg{width:19px;height:19px;stroke:currentColor;fill:none;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round}
.tb-card-h b{flex:1;font-size:16px}
.tb-card-l{display:flex;flex-direction:column;margin-bottom:8px}
.tb-row{display:block;text-decoration:none;color:inherit;padding:8px 2px;border-top:1px solid var(--line)}
.tb-row:first-child{border-top:0}
.tb-row b{display:block;font-size:14.5px;line-height:1.3;overflow:hidden;text-overflow:ellipsis;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}
.tb-row small{display:block;color:var(--muted);font-size:12.5px;margin-top:1px}
.tb-bar{display:flex;align-items:center;justify-content:space-between;gap:8px;flex-wrap:wrap;margin-top:6px}
.tb-it{padding:0;overflow:hidden}
.tb-it.new{border-color:color-mix(in srgb,var(--acc) 45%,var(--line));box-shadow:inset 4px 0 0 var(--acc),var(--shadow)}
.tb-h{display:block;width:100%;text-align:left;background:none;border:0;padding:12px 14px;min-height:56px}
.tb-h.static{cursor:default}
.tb-t{display:block;font-weight:700;font-size:15.5px;line-height:1.35;overflow-wrap:anywhere}
.tb-h small{display:block;color:var(--muted);font-size:12.5px;margin-top:2px}
.tb-b{padding:0 14px 12px;font-size:15px;overflow-wrap:anywhere}
.tb-b p{margin:0 0 10px}
.tb-push{display:flex;align-items:center;gap:12px;margin:0 0 12px;padding:12px 14px}
.tb-push .n{width:36px;height:36px;border-radius:10px;background:var(--pri-l);color:var(--pri-d);display:grid;place-items:center;flex:none}
.tb-push .grow{min-width:0}
.tb-push b{display:block;font-size:15px;line-height:1.3}
.tb-push small{display:block;color:var(--muted);font-size:12.5px;margin-top:2px}
.tb-push-h{display:flex;align-items:flex-start;gap:12px}
.tb-push.sw{cursor:pointer}
.tb-push.sw input{position:absolute;opacity:0;width:1px;height:1px}
.tb-push .sw-t{position:relative;flex:none;width:50px;height:30px;border-radius:999px;background:#c5ccd3;transition:background .15s}
.tb-push .sw-t::after{content:"";position:absolute;top:3px;left:3px;width:24px;height:24px;border-radius:50%;background:#fff;box-shadow:0 1px 3px rgba(0,0,0,.3);transition:transform .15s}
.tb-push input:checked~.sw-t{background:var(--pri)}
.tb-push input:checked~.sw-t::after{transform:translateX(20px)}
.tb-push input:focus-visible~.sw-t{outline:3px solid color-mix(in srgb,var(--pri) 55%,#fff);outline-offset:2px}
.tb-push input:disabled~.sw-t{opacity:.5}
.tb-form{margin-bottom:6px}
.tb-pin{display:flex;align-items:center;gap:10px;min-height:44px;margin:4px 0;font-size:15px;font-weight:600}
.tb-pin input{width:22px;height:22px;accent-color:var(--pri);margin:0}
[data-cls-tb] svg{width:20px;height:20px;stroke:currentColor;fill:none;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round}

/* ---- đề cương (chương trình đào tạo) của khóa và chương trình riêng của lớp (bản 4.0, C4) ---- */
.pl-seg{display:grid;grid-template-columns:1fr 1fr;gap:4px;padding:4px;margin:16px 0 10px;background:var(--soft);border-radius:14px}
.pl-seg button{min-height:46px;padding:6px 8px;border:0;border-radius:11px;background:transparent;color:var(--muted);font:inherit;font-weight:700;font-size:13.5px;line-height:1.25;text-align:center}
.pl-seg button[aria-pressed="true"]{background:var(--card);color:var(--ink);box-shadow:var(--shadow)}
.pl-sub{margin:0 2px 10px;font-size:14px;color:var(--muted)}
.pl-sub b{color:var(--ink)}
.pl-list{display:flex;flex-direction:column;gap:12px}
.pl-part{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:12px}
.pl-h{display:flex;align-items:center;gap:12px}
.pl-h .n{width:36px;height:36px;border-radius:10px;background:var(--pri-l);color:var(--pri-d);display:grid;place-items:center;font-weight:800;font-size:15px;flex:none}
.pl-h .n.done{background:var(--pri);color:#fff}
.pl-h b{display:block;font-size:15.5px;line-height:1.3}
.pl-h small{display:block;color:var(--muted);font-size:12.5px;margin:2px 0 6px}
.pl-sec{margin-top:8px;border:1px solid var(--line);border-radius:12px;background:var(--bg)}
.pl-sec>summary{display:flex;align-items:center;gap:10px;min-height:48px;padding:8px 12px;cursor:pointer;font-weight:650;font-size:14.5px;line-height:1.3;list-style:none}
.pl-sec>summary::-webkit-details-marker{display:none}
.pl-sec>summary::after{content:"";width:8px;height:8px;border-right:2px solid var(--muted);border-bottom:2px solid var(--muted);transform:rotate(45deg);margin:0 4px 3px 2px;flex:none;transition:transform .2s}
.pl-sec[open]>summary::after{transform:rotate(-135deg);margin-bottom:-3px}
.pl-sec>summary small{color:var(--muted);font-weight:600;font-size:12.5px;flex:none}
.pl-sec .list{padding:0 8px 8px}
.pl-soon{background:var(--soft);border-style:dashed}
.pl-ext .pl-sm{padding-bottom:2px}
.pl-ext .pl-sm .pill{flex:none;background:var(--card,#fff)}
.pl-xt{margin:0;padding:0 12px 10px 56px;font-size:13px;line-height:1.45;font-weight:500;color:var(--muted)}
.pl-sm{display:flex;align-items:center;gap:10px;min-height:48px;padding:8px 12px;font-weight:600;font-size:14.5px;line-height:1.3;color:var(--muted)}
.pl-sm small{flex:none;font-size:12.5px;font-weight:700}
.pl-sn{flex:none;min-width:34px;padding:2px 6px;border-radius:8px;background:var(--pri-l);color:var(--pri-d);font-size:12.5px;font-weight:800;text-align:center}
.pl-kt{border-color:var(--pri);background:var(--card)}
.pl-kt .n{background:var(--pri);color:#fff}
.pl-kt small b{color:var(--ink)}
.pl-kd{color:var(--pri-d)}
/* chỉnh chương trình lớp của giảng viên */
.pl-edsec{margin-top:10px}
.pl-edh{display:flex;align-items:center;gap:8px;margin:0 0 6px;font-size:14px;line-height:1.3}
.pl-ed-l{display:flex;flex-direction:column;gap:6px;padding:10px;margin-bottom:6px;border:1px solid var(--line);border-radius:12px;background:var(--card)}
.pl-ed-l.off{background:var(--soft);border-style:dashed}
.pl-ed-l.off .pl-ed-t b{color:var(--muted);text-decoration:line-through}
.pl-ed-t b{display:block;font-size:14.5px;line-height:1.3}
.pl-ed-t small{display:block;color:var(--muted);font-size:12.5px;margin-top:2px}
.pl-ed-c{display:flex;gap:6px;justify-content:flex-end;flex-wrap:wrap}
.pl-ed-c .btn{min-width:64px;min-height:44px;padding:0 12px}
.pl-ed-c .btn:disabled{opacity:.4}
.pl-edkt{margin:12px 0}
.pl-edkt .n{width:36px;height:36px;border-radius:10px;background:var(--pri);color:#fff;display:grid;place-items:center;flex:none}
.pl-edkt .n svg{width:20px;height:20px;stroke:currentColor;fill:none;stroke-width:2}
.pl-edkt .row{gap:12px}
.pl-edkt .btn{margin-top:4px}
.pl-bar{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin:14px 0 6px}
.pl-bar .btn{flex:1 1 140px}
.pl-bar .pill{flex:none}
[data-cls-ct] svg,[data-cls-mk] svg{width:20px;height:20px;stroke:currentColor;fill:none;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round}

/* ================= bản 4.0, C5: sổ điểm của giảng viên, kết quả học tập của học viên */
.mk-card .grow,.mk-row .grow{min-width:0}
.mk-ts{display:flex;flex-wrap:wrap;gap:6px;margin-top:6px}
.mk-t{display:inline-flex;align-items:baseline;gap:5px;font-size:13px;font-weight:700;background:var(--soft);border-radius:8px;padding:2px 8px;min-width:44px;justify-content:center}
.mk-t i{font-style:normal;font-size:11px;font-weight:600;color:var(--muted)}
.mk-t.mk-f{background:var(--pri-l);color:var(--pri-d)}
.mk-row{display:grid;grid-template-columns:minmax(0,1fr) auto 20px;gap:6px 8px;align-items:center}
.mk-row .grow{grid-column:1;grid-row:1;min-width:0}
.mk-row [data-lock]{grid-column:2;grid-row:1}
.mk-row .chev{grid-column:3;grid-row:1/3}
.mk-row .mk-ts{grid-column:1/3;grid-row:2;margin-top:0}
.mk-legend{display:flex;flex-wrap:wrap;gap:4px 14px;margin:10px 2px 8px}
.mk-legend b{color:var(--ink)}
.mk-test{margin-top:10px}
.mk-img{display:block;width:100%;margin:8px 0;padding:6px;background:#fff;border:1px solid var(--line);border-radius:10px;cursor:zoom-in}
.mk-img img{display:block;max-width:100%;max-height:150px;margin:0 auto;object-fit:contain}
.mk-its{display:flex;flex-direction:column;gap:2px;margin:6px 0}
.mk-it{display:flex;align-items:center;gap:8px;min-height:44px;border-bottom:1px solid var(--line)}
.mk-it:last-child{border-bottom:0}
.mk-n{flex:1;min-width:0;font-size:14.5px}
.mk-sc{flex:none;font-size:12.5px;color:var(--muted)}
.mk-its.ro .mk-sc{font-size:14px;color:var(--ink)}
.mk-stp{flex:none;display:inline-flex;align-items:center;gap:6px}
.mk-stp b{min-width:42px;text-align:center;font-size:17px}
.mk-stp .ib{width:40px;height:40px;border:1px solid var(--line);border-radius:10px;background:var(--card);font-size:22px;font-weight:700;line-height:1;color:var(--pri-d);cursor:pointer}
.mk-stp .ib:disabled{opacity:.4;cursor:default}
.mk-test textarea,[data-mk="end"] textarea{width:100%}
@media (min-width:720px){.mk-row{grid-template-columns:minmax(0,1fr) auto auto 20px}.mk-row .grow{grid-row:1}.mk-row .mk-ts{grid-column:2;grid-row:1}.mk-row [data-lock]{grid-column:3;grid-row:1}.mk-row .chev{grid-column:4;grid-row:1}.mk-img img{max-height:200px}}
.btn.is-off{opacity:.45;pointer-events:none}
.pl-edkt .grow small{display:block;margin-top:2px}

/* ---- Hồ sơ: chỗ ở ký túc xá (C9) và Học phí của tôi (C10) */
.fin-note{margin:0 2px 8px;font-size:13.5px;line-height:1.5;color:var(--muted)}
.fin-b{padding:12px}
.fin-h{display:flex;align-items:flex-start;justify-content:space-between;gap:8px}
.fin-h b{min-width:0;font-size:15.5px;line-height:1.3;overflow-wrap:anywhere}
.fin-b .kv b{font-variant-numeric:tabular-nums;text-align:right}
.fin-b .kv:last-of-type{border-bottom:0}
.fin-late{color:var(--bad)}
.fin-rc{display:grid;grid-template-columns:1fr auto;gap:2px 10px;align-items:center;width:100%;text-align:left;border:1px solid var(--line);background:var(--card);border-radius:10px;padding:8px 10px;margin-top:6px;font:inherit;color:inherit;min-height:44px;cursor:pointer}
.fin-rc small{grid-column:1 / -1;color:var(--muted);font-size:12.5px}
.fin-rc.v{opacity:.6;text-decoration:line-through}

/* ---- việc làm: tin tuyển dụng (bản 4.0, C11a) */
.vl-find{margin:0 0 6px}
.vl-list{gap:10px}
.vl-it{display:block;text-decoration:none;color:inherit;padding:13px 14px}
.vl-it:active{background:var(--soft)}
.vl-h{display:flex;align-items:flex-start;justify-content:space-between;gap:8px}
.vl-h b{font-size:16.5px;line-height:1.3}
.vl-h .pill{flex:none;margin-top:1px}
.vl-co{font-size:14px;font-weight:650;color:var(--pri-d);margin-top:2px}
.vl-m{list-style:none;margin:8px 0 0;padding:0;display:flex;flex-wrap:wrap;gap:5px 6px}
.vl-m li{font-size:13px;background:var(--soft);border-radius:8px;padding:2px 9px;color:#334155}
.vl-f{font-size:13px;color:var(--muted);margin-top:8px}
.vl-f b{color:var(--ink)}
.vl-d{padding:16px 14px}
.vl-d .vl-h h2{font-size:21px}
.vl-pills,.vl-tags{display:flex;flex-wrap:wrap;gap:6px;margin-top:8px}
.vl-pills:empty{display:none}
.vl-kv{margin:12px 0 0;display:grid;grid-template-columns:1fr;gap:8px}
.vl-kv div{display:flex;gap:10px;align-items:baseline;border-top:1px solid var(--line);padding-top:8px}
.vl-kv dt{flex:0 0 132px;font-size:13px;color:var(--muted);font-weight:650}
.vl-kv dd{margin:0;font-weight:600;min-width:0;overflow-wrap:anywhere}
.vl-tags{margin:12px 0 0}
.vl-s{margin-top:10px}
.vl-s h3{font-size:15px;margin-bottom:6px}
.vl-s p{margin:0 0 .6em;overflow-wrap:anywhere}
.vl-s p:last-child{margin-bottom:0}
.vl-cv{margin:16px 0 4px}
@media(max-width:380px){.vl-kv dt{flex-basis:110px}}

/* chuỗi dài không dấu cách (tên tin, đơn vị, nơi làm, ghi chú) không làm tràn trang (sửa sau nghiệm thu C11) */
.vl-d,.vl-it,.vl-s,.vl-h,.vl-co,.cv-app,.cv-app b,.cv-app p,.card.empty{overflow-wrap:anywhere}
.vl-h b,.vl-d .vl-h h2,.cv-app .row b.grow{min-width:0;overflow-wrap:anywhere}
.cv{overflow-wrap:anywhere}
.cv-keep{break-inside:avoid;page-break-inside:avoid}
.cv-hd{break-inside:avoid;page-break-inside:avoid}

/* dải "Có bản mới" (cập nhật app) */
.upd-bar{position:fixed;left:50%;bottom:calc(84px + env(safe-area-inset-bottom));transform:translateX(-50%);z-index:160;display:flex;align-items:center;gap:10px;background:var(--ink);color:#fff;padding:8px 8px 8px 16px;border-radius:14px;font-size:14.5px;font-weight:600;max-width:calc(100vw - 24px);box-shadow:0 6px 20px rgba(0,0,0,.25)}
.upd-bar .btn{min-height:40px}
.upd-x{min-width:40px;min-height:40px;border:0;background:none;color:#fff;font-size:22px;cursor:pointer}
@media print{.upd-bar{display:none}}
/* APP-1 (B4, B6): công tắc Khóa miễn phí / VIP và mục "Khóa muốn đăng ký học" ở màn đăng ký */
.free-sw{display:flex;align-items:center;gap:10px;margin-top:12px;padding:10px 12px}
.free-sw .grow{min-width:0}
.free-sw b{display:block;font-size:15px}
.free-sw small{display:block;margin-top:2px;color:var(--muted);font-size:13px;line-height:1.35}
.free-sw .btn{flex:none}
.want-cs{border:0;padding:0;margin:12px 0 0;min-width:0}
.want-cs legend{padding:0;font-size:14px;font-weight:700;margin-bottom:6px}
.want-ck{display:flex;align-items:center;gap:10px;min-height:44px;padding:6px 12px;margin-bottom:6px;border:1.5px solid var(--line);border-radius:12px;background:var(--card);font-size:15px;font-weight:600;cursor:pointer}
.want-ck input{width:22px;height:22px;accent-color:var(--pri);flex:none;margin:0}
.want-cs small{display:block;margin-top:2px;font-size:13px;line-height:1.4}
/* Màu riêng từng khóa: nền thẻ nhạt, viền trái và tên khóa đậm cùng màu; tên khóa in hoa theo phông tiêu đề của web cvtech.vn */
[data-c="vkt"]{--cc:#0b6b33;--cl:#e2f3e8} [data-c="ds"]{--cc:#1d4ed8;--cl:#e5edff} [data-c="tien"]{--cc:#0f766e;--cl:#dff3f1} [data-c="phay"]{--cc:#c2410c;--cl:#fdebe6} [data-c="phlt"]{--cc:#4338ca;--cl:#e6e5fb}
.item.crs[data-c],.card.course[data-c]{background:linear-gradient(90deg,var(--cl),color-mix(in srgb,var(--cl) 35%,#fff));border-color:color-mix(in srgb,var(--cc) 25%,var(--line));border-left:5px solid var(--cc)}
.card.course[data-c] .c-foot{background:transparent;border-top-color:color-mix(in srgb,var(--cc) 18%,var(--line))}
.item.crs[data-c] .n{background:#fff}
.card.course[data-c] .c-ic{background:#fff}
.item.crs[data-c]>.grow>b,.card.course[data-c] .c-main b{font-family:var(--disp);font-weight:800;text-transform:uppercase;letter-spacing:.02em;font-size:21px;line-height:1.1;color:var(--cc)}
.item.crs[data-c] .bar,.card.course[data-c] .bar{background:#fff}
.item.crs[data-c] .bar i,.card.course[data-c] .bar i{background:var(--cc)}
/* Tab Khóa học chia nhóm: ô tìm kiếm, nút lọc, lưới thẻ nhỏ gọn, trang khóa sắp mở, khung quyền ở trang khóa */
:where(.kc,.kh-now,.soon-pg){--cc:#475569;--cl:#eef1f5}
[data-col="green"]{--cc:#0b6b33;--cl:#e2f3e8} [data-col="blue"]{--cc:#1d4ed8;--cl:#e5edff} [data-col="teal"]{--cc:#0f766e;--cl:#dff3f1} [data-col="orange"]{--cc:#c2410c;--cl:#fdebe6} [data-col="indigo"]{--cc:#4338ca;--cl:#e6e5fb}
[data-col="red"]{--cc:#b91c1c;--cl:#fde8e8} [data-col="amber"]{--cc:#a16207;--cl:#fdf1dc} [data-col="slate"]{--cc:#475569;--cl:#eef1f5} [data-col="pink"]{--cc:#be185d;--cl:#fce7f1} [data-col="cyan"]{--cc:#0e7490;--cl:#dcf3f8}
.kh-bar{margin:0 0 4px}
.kh-q{display:block;width:100%;min-height:46px;padding:0 14px;border:1.5px solid var(--line);border-radius:12px;background:var(--card);color:var(--ink);font:inherit;font-size:16px;-webkit-appearance:none;appearance:none;box-sizing:border-box}
.kh-q:focus{outline:2px solid var(--pri);outline-offset:0;border-color:var(--pri)}
.kh-chips{display:flex;gap:8px;margin-top:8px;overflow-x:auto;scrollbar-width:none;padding:1px 1px 2px;-webkit-overflow-scrolling:touch}
.kh-chips::-webkit-scrollbar{display:none}
.kh-chip{flex:none;min-height:44px;padding:0 15px;border:1.5px solid var(--line);border-radius:999px;background:var(--card);color:var(--ink);font:inherit;font-size:14.5px;font-weight:650;white-space:nowrap;cursor:pointer}
.kh-chip[aria-pressed="true"]{background:var(--pri);border-color:var(--pri);color:#fff}
[data-kh-now]{min-width:0}
.kh-nows{display:flex;gap:8px;overflow-x:auto;scrollbar-width:none;padding:1px 1px 4px}
.kh-nows::-webkit-scrollbar{display:none}
.kh-now{flex:none;display:flex;align-items:center;gap:10px;min-height:56px;width:min(260px,82%);padding:8px 12px;border:1px solid color-mix(in srgb,var(--cc) 25%,var(--line));border-left:5px solid var(--cc);border-radius:var(--r);background:linear-gradient(90deg,var(--cl),#fff);text-decoration:none;color:var(--ink);box-sizing:border-box}
.kh-now .grow{min-width:0}
.kh-now b{display:block;font-family:var(--disp);font-weight:800;text-transform:uppercase;letter-spacing:.02em;font-size:16px;line-height:1.1;color:var(--cc);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.kh-now .bar{display:block;margin-top:6px;background:#fff}
.kh-now .bar i{background:var(--cc)}
.kh-now small{flex:none;font-weight:700;color:var(--cc)}
.kh-grp{min-width:0}
.kh-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
@media (min-width:560px){.kh-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media (min-width:820px){.kh-grid{grid-template-columns:repeat(4,minmax(0,1fr))}}
.kc{display:grid;grid-template-columns:auto minmax(0,1fr);align-items:start;gap:6px 6px;min-height:112px;padding:11px 11px 10px;border:1px solid color-mix(in srgb,var(--cc) 25%,var(--line));border-top:4px solid var(--cc);border-radius:var(--r);background:linear-gradient(160deg,var(--cl),color-mix(in srgb,var(--cl) 30%,#fff));text-decoration:none;color:var(--ink);box-sizing:border-box;min-width:0}
.kc:active{transform:translateY(1px)}
.kc-ic{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:10px;background:#fff;color:var(--cc);flex:none}
.kc-ic svg{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.kc>.pill{justify-self:end;min-width:0;max-width:100%;overflow:hidden;text-overflow:ellipsis}
.kc-n{grid-column:1/-1;font-family:var(--disp);font-weight:800;text-transform:uppercase;letter-spacing:.02em;font-size:17px;line-height:1.1;color:var(--cc);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;overflow-wrap:anywhere}
.kc-m{grid-column:1/-1;align-self:end;font-size:12.5px;line-height:1.3;color:var(--muted)}
.kc.soon{opacity:.6}
.kc.soon .kc-ic{color:#8b94a3}
.kc.soon .kc-n{color:#475569}
.kc-more{display:flex;align-items:center;justify-content:center;min-height:44px;margin-top:8px;border-radius:12px;font-weight:700;font-size:14.5px;color:var(--pri-d);text-decoration:none;background:var(--pri-l)}
[data-kh-none] .btn{margin-top:6px}
.soon-pg{padding:16px;border:1px solid color-mix(in srgb,var(--cc) 25%,var(--line));border-top:5px solid var(--cc);border-radius:var(--r);background:linear-gradient(160deg,var(--cl),#fff 70%);box-shadow:var(--shadow)}
.soon-pg .kc-ic{width:48px;height:48px;border-radius:14px}
.soon-pg .kc-ic svg{width:28px;height:28px}
.soon-pg>.pill{margin-left:8px;vertical-align:top}
.soon-pg .kc-n{display:block;margin:10px 0 2px;font-size:28px;-webkit-line-clamp:unset}
.soon-pg .sp-g{margin:0 0 10px}
.soon-pg .sp-d{margin:0 0 14px;font-size:16px;line-height:1.55}
.soon-pg .btn.block,.soon-pg .note{margin-top:8px}
.acc-bar{display:flex;align-items:center;gap:10px;margin-top:12px;padding:10px 12px}
.acc-bar .grow{min-width:0}
.acc-bar b{font-size:15px}
.acc-bar .btn,.acc-bar .btn.sm{min-height:44px}
.acc-intro{margin:10px 2px 0;font-size:15px;line-height:1.5}
/* đề mục nhóm khóa học: to và đậm hơn tên khóa, phông tiêu đề như web cvtech.vn */
.kh-grp .kh-gt{font-family:var(--disp);font-weight:800;text-transform:uppercase;font-size:28px;line-height:1.1;letter-spacing:.02em;color:var(--ink);margin:26px 0 12px;padding-left:12px;border-left:6px solid var(--pri)}
@media(max-width:460px){.kh-grp .kh-gt{font-size:25px}}