:root{
  --orange:#F26A21; --orange-d:#D9541A; --orange-l:#FFF1E8;
  --navy:#1F2A44; --ink:#2B2F38; --muted:#6B7280; --line:#E7E1DA;
  --bg:#FFF9F4; --card:#FFFFFF; --green:#2E9D5B; --green-l:#E7F6EE;
  --blue:#2F6FD6; --blue-l:#EAF1FD; --red:#D64545; --gold:#F5B301;
  --r:16px;
}
*{box-sizing:border-box}
html,body{margin:0}
body{font-family:'Be Vietnam Pro',system-ui,sans-serif;background:var(--bg);color:var(--ink);font-size:16px;line-height:1.5}
button{font-family:inherit;font-size:inherit;cursor:pointer}
input,select,textarea{font-family:inherit;font-size:16px}
.top{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 20px;background:#fff;border-bottom:3px solid var(--orange);position:sticky;top:0;z-index:20}
.brand{display:flex;align-items:center;gap:10px}
.logo{background:var(--orange);color:#fff;font-weight:800;padding:6px 10px;border-radius:10px;letter-spacing:1px}
.brand-t{font-weight:700;color:var(--navy);display:flex;flex-direction:column;line-height:1.15}
.brand-t small{font-weight:500;color:var(--muted);font-size:12px}
.top-info{font-size:13px;color:var(--muted);text-align:right}
@media(max-width:520px){.brand-t small{display:none}.top{padding:10px 14px}}
main{max-width:980px;margin:0 auto;padding:20px 16px 80px}
h1,h2,h3{color:var(--navy);line-height:1.25}
h1{font-size:26px;margin:8px 0 6px}
h2{font-size:21px;margin:4px 0 10px}
h3{font-size:17px;margin:0 0 8px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:20px;margin:14px 0;box-shadow:0 2px 0 rgba(0,0,0,.02)}
.center{text-align:center}
.muted{color:var(--muted)}
.small{font-size:13px}
.btn{border:0;border-radius:12px;padding:12px 20px;font-weight:700;background:var(--orange);color:#fff;transition:.15s}
.btn:hover{background:var(--orange-d)}
.btn:disabled{opacity:.45;cursor:not-allowed}
.btn.ghost{background:#fff;color:var(--navy);border:2px solid var(--line)}
.btn.ghost:hover{border-color:var(--orange);color:var(--orange-d)}
.btn.green{background:var(--green)}
.btn.blue{background:var(--blue)}
.btn.red{background:var(--red)}
.btn.sm{padding:8px 14px;font-size:14px;border-radius:10px}
.row{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.between{justify-content:space-between}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:14px}
@media(max-width:640px){.grid2{grid-template-columns:1fr}}
label.f{display:block;font-weight:600;font-size:14px;margin:10px 0 4px;color:var(--navy)}
.inp{width:100%;padding:11px 12px;border:2px solid var(--line);border-radius:10px;background:#fff}
.inp:focus{outline:none;border-color:var(--orange)}
.notice{background:var(--orange-l);border-left:4px solid var(--orange);padding:12px 14px;border-radius:10px;font-size:14px}
.notice.blue{background:var(--blue-l);border-color:var(--blue)}
.notice.green{background:var(--green-l);border-color:var(--green)}

/* gate */
.gate{max-width:420px;margin:40px auto}

/* test choice */
.tests{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.tests button{border:2px solid var(--line);background:#fff;border-radius:14px;padding:14px 8px;font-weight:700;color:var(--navy)}
.tests button.on{border-color:var(--orange);background:var(--orange-l);color:var(--orange-d)}

/* home skills */
.skills{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
@media(max-width:720px){.skills{grid-template-columns:1fr}}
.skill{background:#fff;border:2px solid var(--line);border-radius:18px;padding:18px;text-align:left;display:flex;flex-direction:column;gap:6px}
.skill:hover{border-color:var(--orange)}
.skill .ic{font-size:34px}
.skill b{font-size:18px;color:var(--navy)}
.prog{height:8px;background:#F1ECE6;border-radius:8px;overflow:hidden;margin-top:6px}
.prog i{display:block;height:100%;background:var(--green)}

/* part header */
.phead{display:flex;justify-content:space-between;align-items:flex-start;gap:12px}
.phead>div{flex:1}
.phead>.btn{flex:none;white-space:nowrap}
.tag{display:inline-block;background:var(--navy);color:#fff;font-size:12px;font-weight:700;padding:4px 10px;border-radius:20px}
.instr{font-size:18px;font-weight:700;color:var(--navy);margin:8px 0 2px}
.instr-vi{font-size:14px;color:var(--muted);margin-bottom:6px}
.steps{display:flex;gap:6px;flex-wrap:wrap;margin:6px 0 12px}
.steps button{border:2px solid var(--line);background:#fff;border-radius:10px;padding:6px 12px;font-weight:700;font-size:14px;color:var(--navy)}
.steps button.on{background:var(--navy);color:#fff;border-color:var(--navy)}
.steps button.done{border-color:var(--green)}

/* audio player */
.player{display:flex;align-items:center;gap:12px;flex-wrap:wrap;background:var(--blue-l);border-radius:14px;padding:12px 14px;margin:8px 0 14px}
.player .st{font-size:14px;color:var(--navy);font-weight:600}
.playdots{display:flex;gap:4px}
.playdots i{width:12px;height:12px;border-radius:50%;background:#fff;border:2px solid var(--blue)}
.playdots i.used{background:var(--blue)}

/* chips & people */
.chips{display:flex;gap:8px;flex-wrap:wrap;margin:8px 0 12px}
.chip{border:2px solid var(--navy);background:#fff;border-radius:999px;padding:7px 14px;font-weight:700;color:var(--navy)}
.chip.sel{background:var(--orange);border-color:var(--orange);color:#fff}
.chip.used{border-color:var(--green);color:var(--green)}
.chip.ex{border-style:dashed;opacity:.7;cursor:default}
.scene{background:linear-gradient(#EAF6FF,#F4FBEA);border:2px solid #D7E8D0;border-radius:18px;padding:14px}
.scene-t{font-weight:700;color:var(--navy);margin-bottom:8px}
.people{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}
@media(max-width:640px){.people{grid-template-columns:repeat(2,1fr)}}
.person{background:#fff;border:2px solid var(--line);border-radius:14px;padding:10px;text-align:center;position:relative;min-height:120px}
.person .em{font-size:38px;line-height:1.2}
.person .cap{font-size:13px;color:var(--muted)}
.person .lt{position:absolute;top:6px;left:8px;font-weight:800;color:var(--navy);font-size:13px}
.person .nm{display:inline-block;margin-top:6px;background:var(--orange);color:#fff;font-weight:700;font-size:13px;border-radius:999px;padding:2px 10px}
.person .nm.ex{background:var(--muted)}
.person.click{cursor:pointer}
.person.click:hover{border-color:var(--orange)}

/* forms in listening part 2 */
.lform{max-width:560px}
.lrow{display:flex;align-items:center;gap:10px;padding:8px 0;border-bottom:1px dashed var(--line)}
.lrow .num{width:26px;font-weight:800;color:var(--orange-d)}
.lrow .lab{flex:1;font-weight:600}
.lrow .val{flex:1;display:flex;align-items:center;gap:6px}
.exval{font-family:'Comic Sans MS','Be Vietnam Pro',cursive;color:var(--blue);font-weight:700}

/* match table */
.opts{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-bottom:14px}
@media(max-width:640px){.opts{grid-template-columns:repeat(2,1fr)}}
.opt{background:#fff;border:2px solid var(--line);border-radius:14px;padding:10px;text-align:center}
.opt .em{font-size:36px}
.opt .lt{font-weight:800;color:var(--navy)}
.mrow{display:flex;align-items:center;gap:10px;padding:8px 0;border-bottom:1px dashed var(--line);flex-wrap:wrap}
.mrow .who{min-width:120px;font-weight:700}
.lbox{display:flex;gap:6px;flex-wrap:wrap}
.lbox button{width:40px;height:40px;border-radius:10px;border:2px solid var(--line);background:#fff;font-weight:800;color:var(--navy)}
.lbox button.on{background:var(--orange);border-color:var(--orange);color:#fff}

/* mcq pictures */
.mcq{margin:10px 0 18px}
.mcq .q{font-weight:700;margin-bottom:6px}
.pics{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.pic{background:#fff;border:2px solid var(--line);border-radius:14px;padding:12px 6px;text-align:center;position:relative}
.pic .em{font-size:40px}
.pic .cap{font-size:13px;color:var(--muted)}
.pic .ab{position:absolute;top:6px;left:8px;font-weight:800;color:var(--navy)}
.pic.on{border-color:var(--green);background:var(--green-l)}
.pic.on::after{content:'✔';position:absolute;top:4px;right:8px;color:var(--green);font-size:22px;font-weight:800}
.pic.static{cursor:default}

/* colour part */
.palette{display:flex;gap:8px;flex-wrap:wrap;align-items:center;background:#fff;border:2px solid var(--line);border-radius:14px;padding:10px;margin-bottom:12px;position:sticky;top:70px;z-index:5}
.pen{width:40px;height:40px;border-radius:50%;border:3px solid #fff;box-shadow:0 0 0 2px var(--line)}
.pen.on{box-shadow:0 0 0 3px var(--navy)}
.pen.write{width:auto;border-radius:10px;padding:0 12px;background:#fff;font-weight:700;color:var(--navy);height:40px}
.pen.erase{width:auto;border-radius:10px;padding:0 12px;background:#fff;font-weight:700;color:var(--red);height:40px}
.objs{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
@media(max-width:640px){.objs{grid-template-columns:repeat(2,1fr)}}
.obj{background:#fff;border:2px solid var(--line);border-radius:14px;padding:10px;text-align:center;cursor:pointer;position:relative}
.obj .em{font-size:38px;display:inline-block;padding:6px 10px;border-radius:14px}
.obj .cap{font-size:13px;color:var(--muted)}
.obj .word{margin-top:6px;font-family:'Comic Sans MS',cursive;font-weight:700;color:var(--navy);min-height:20px}
.obj .swatch{position:absolute;top:8px;right:8px;width:18px;height:18px;border-radius:50%;border:2px solid #fff;box-shadow:0 0 0 1px #ccc}
.obj.ex{cursor:default;opacity:.85}

/* reading */
.bank{display:flex;gap:8px;flex-wrap:wrap;margin:8px 0 14px}
.bank span{background:#fff;border:2px solid var(--line);border-radius:12px;padding:6px 10px;font-weight:600}
.bank span em{font-style:normal;font-size:22px;margin-right:4px}
.qline{display:flex;gap:10px;align-items:center;padding:9px 0;border-bottom:1px dashed var(--line);flex-wrap:wrap}
.qline .n{font-weight:800;color:var(--orange-d);width:24px}
.qline .t{flex:1;min-width:220px}
.qline select,.qline .inp{max-width:240px}
.dlg .who{font-weight:700;color:var(--navy);margin-bottom:6px}
.abc{display:flex;flex-direction:column;gap:6px;margin:6px 0 14px}
.abc button{text-align:left;border:2px solid var(--line);background:#fff;border-radius:12px;padding:9px 12px}
.abc button b{color:var(--navy);margin-right:8px}
.abc button.on{border-color:var(--green);background:var(--green-l)}
.story{background:#fff;border:2px solid var(--line);border-radius:14px;padding:16px;line-height:2.1;font-size:17px}
.story select{font-size:15px;padding:3px 6px;border:2px solid var(--orange);border-radius:8px;background:var(--orange-l);font-weight:600}
.story .exg{border-bottom:2px solid var(--blue);color:var(--blue);font-weight:700;padding:0 6px}
.story .gn{font-weight:800;color:var(--orange-d);font-size:13px;vertical-align:super;margin-right:2px}
.sec{display:flex;gap:14px;align-items:flex-start;background:#fff;border:2px solid var(--line);border-radius:14px;padding:14px;margin-bottom:10px}
.sec .em{font-size:34px;min-width:110px;text-align:center;background:#F6F8FB;border-radius:12px;padding:10px 4px}
@media(max-width:640px){.sec{flex-direction:column}.sec .em{min-width:0;width:100%}}
.items{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
@media(max-width:640px){.items{grid-template-columns:repeat(2,1fr)}}
.item{background:#fff;border-radius:12px;padding:10px;text-align:center;border:1px solid var(--line)}
.item .em{font-size:30px}
.item .cap{font-size:13px;color:var(--muted)}
textarea.inp{min-height:60px;resize:vertical}

/* speaking */
.rec{display:flex;align-items:center;gap:12px;flex-wrap:wrap;background:#FFF4EC;border:2px dashed var(--orange);border-radius:14px;padding:14px;margin-top:12px}
.recdot{width:14px;height:14px;border-radius:50%;background:var(--red);animation:blink 1s infinite}
@keyframes blink{50%{opacity:.25}}
.time{font-weight:800;font-variant-numeric:tabular-nums;color:var(--navy)}
.prompts{display:flex;flex-direction:column;gap:6px}
.prompts button{text-align:left;border:2px solid var(--line);background:#fff;border-radius:12px;padding:9px 12px;color:var(--navy)}
.prompts button.played{border-color:var(--blue);background:var(--blue-l)}
.sets{display:grid;grid-template-columns:1fr 1fr;gap:10px}
@media(max-width:640px){.sets{grid-template-columns:1fr}}
.set{background:#fff;border:2px solid var(--line);border-radius:14px;padding:10px}
.set .em{font-size:34px;letter-spacing:6px}
.set .n{font-weight:800;color:var(--navy)}
.storyp{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}
@media(max-width:640px){.storyp{grid-template-columns:repeat(2,1fr)}}
.storyp .item .n{font-weight:800;color:var(--orange-d)}

/* nav */
.nav{display:flex;justify-content:space-between;gap:10px;margin-top:18px;flex-wrap:wrap}

/* result */
.shields{display:flex;gap:4px;font-size:28px}
.shields i{font-style:normal;filter:grayscale(1);opacity:.25}
.shields i.on{filter:none;opacity:1}
.resrow{display:flex;justify-content:space-between;align-items:center;gap:10px;padding:14px 0;border-bottom:1px solid var(--line);flex-wrap:wrap}
.resrow b{font-size:18px;color:var(--navy)}
.big{font-size:40px;font-weight:800;color:var(--orange-d)}
table.pt{width:100%;border-collapse:collapse;font-size:14px}
table.pt td,table.pt th{border-bottom:1px solid var(--line);padding:6px 4px;text-align:left}

.toast{position:fixed;left:50%;bottom:20px;transform:translateX(-50%) translateY(120px);background:var(--navy);color:#fff;padding:10px 18px;border-radius:12px;font-size:14px;transition:.25s;z-index:50;max-width:90vw;visibility:hidden}
.toast.on{transform:translateX(-50%) translateY(0);visibility:visible}
.hide{display:none!important}

.timer{font-weight:800;font-variant-numeric:tabular-nums;color:var(--navy);background:#fff;border:2px solid var(--line);border-radius:10px;padding:6px 10px;font-size:15px}
.timer.warn{color:#fff;background:var(--red);border-color:var(--red)}
.skill:disabled{opacity:.55;cursor:not-allowed}

/* ---- tranh thật ---- */
.scenebox{position:relative;border:2px solid var(--line);border-radius:16px;overflow:hidden;background:#fff;margin:6px 0 12px;user-select:none;-webkit-user-select:none}
.scenebox>img{display:block;width:100%;height:auto}
.hot{position:absolute;padding:0;background:transparent;border:3px dashed transparent;border-radius:14px;cursor:pointer}
.scenebox.picking .hot:not(.ex){border-color:rgba(242,106,33,.35)}
.hot:not(.ex):hover,.hot:not(.ex):focus-visible{border-color:var(--orange);background:rgba(242,106,33,.10);outline:none}
.hot.ex{cursor:default}
.hot .nm{position:absolute;top:-4px;left:50%;transform:translateX(-50%);background:var(--orange);color:#fff;font-weight:800;font-size:clamp(11px,1.6vw,15px);border-radius:999px;padding:2px 10px;white-space:nowrap;box-shadow:0 2px 6px rgba(0,0,0,.25)}
.hot .nm.ex{background:var(--muted)}
.pimg{display:block;width:100%;max-width:150px;aspect-ratio:1/1;object-fit:contain;margin:0 auto;border-radius:10px}
.pimg.wide{max-width:none;aspect-ratio:auto}
.opt.hasimg{padding:6px}
.opt.hasimg .lt{text-align:left;padding-left:4px}
.wbank{display:grid;grid-template-columns:repeat(5,1fr);gap:8px;margin:8px 0 14px}
@media(max-width:640px){.wbank{grid-template-columns:repeat(3,1fr)}}
.wbank figure{margin:0;background:#fff;border:2px solid var(--line);border-radius:12px;padding:6px;text-align:center}
.wbank img{display:block;width:100%;aspect-ratio:1/1;object-fit:contain}
.wbank figcaption{font-weight:700;color:var(--navy);font-size:14px;margin-top:2px}
.sec.hasimg{align-items:center}
.secimg{width:220px;max-width:100%;border-radius:12px;border:1px solid var(--line);flex:none}
@media(max-width:640px){.secimg{width:100%}}
.storyp.hasimg{grid-template-columns:1fr 1fr}
.storyp.hasimg .item{padding:6px}
.setimgs{display:grid;grid-template-columns:repeat(4,1fr);gap:6px;margin-top:4px}
.setimgs img{width:100%;aspect-ratio:1/1;object-fit:contain;background:#fff;border:1px solid var(--line);border-radius:8px}
.paintbox{position:relative;border:2px solid var(--line);border-radius:16px;overflow:hidden;background:#fff;user-select:none;-webkit-user-select:none;touch-action:manipulation}
.paintbox canvas{display:block;width:100%;height:auto;cursor:crosshair}
.paintbox.mode-write canvas{cursor:text}
.paintbox.mode-erase canvas{cursor:cell}
.ptext{position:absolute;transform:translate(-50%,-50%);font-family:'Comic Sans MS','Be Vietnam Pro',cursive;font-weight:700;color:#1F2A44;font-size:clamp(13px,2.4vw,24px);pointer-events:none;white-space:nowrap;text-shadow:0 0 3px #fff,0 0 3px #fff}
.pinput{position:absolute;transform:translate(-50%,-50%);width:150px;padding:6px 8px;border:2px solid var(--orange);border-radius:8px;font-size:16px;font-weight:700;background:#fff;z-index:3}
.ploading{position:absolute;inset:0;display:grid;place-items:center;background:rgba(255,255,255,.85);font-weight:700;color:var(--navy)}
.tests.one{grid-template-columns:1fr;max-width:260px}
.pen.undo{width:auto;border-radius:10px;padding:0 12px;background:#fff;font-weight:700;color:var(--navy);height:40px}