:root{
  --p:#7c4dff; --p2:#b388ff; --pk:#ff7ab6; --ink:#2b2350; --mut:#6f6a8a; --bg1:#f3ecff; --bg2:#ffeef6;
  --ok:#22b07d; --okbg:#e3f8ef; --no:#ef4b6c; --nobg:#ffe7ec; --card:#fff; --line:#e6defa; --r:20px;
  --f:ui-rounded,"SF Pro Rounded","Nunito","Segoe UI",system-ui,-apple-system,Roboto,"Helvetica Neue",Arial,sans-serif;
}
body[data-subj="tv"]{--p:#f0569a; --p2:#ff9cc7; --bg1:#ffeef6; --bg2:#fff4e2; --line:#fbdcea}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font-family:var(--f);color:var(--ink);background:linear-gradient(160deg,var(--bg1),var(--bg2)) fixed;min-height:100vh;min-height:100dvh;-webkit-tap-highlight-color:transparent}
button{font-family:inherit;color:inherit;cursor:pointer;touch-action:manipulation}
[hidden]{display:none!important}
main{max-width:1080px;margin:0 auto;padding:14px 14px calc(18px + env(safe-area-inset-bottom))}
#testbar{background:#ffd166;color:#5a4200;text-align:center;font-weight:700;padding:6px 10px;font-size:14px}

/* Trang chọn trò */
.top{display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:10px;min-width:0}
h1{font-size:clamp(22px,5vw,32px);margin:0;color:var(--p);letter-spacing:.2px}
.grade{background:var(--p);color:#fff;font-weight:800;border-radius:999px;padding:4px 12px;font-size:14px;white-space:nowrap}
.tools{display:flex;align-items:center;gap:8px}
.total{display:inline-flex;align-items:center;gap:5px;background:#fff;border-radius:999px;padding:6px 12px;font-weight:800;box-shadow:0 2px 0 var(--line)}
.total svg{width:20px;height:20px;color:#ffb703;display:block}
.pbtn{display:inline-flex;align-items:center;gap:6px;min-height:44px;text-decoration:none;color:var(--mut);background:#fff;border-radius:999px;padding:6px 12px;font-weight:700;font-size:14px;box-shadow:0 2px 0 var(--line)}
.pbtn svg{width:18px;height:18px}
.tabs{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:16px 0 10px}
.tabs button{border:0;border-radius:18px;padding:14px 10px;font-size:clamp(18px,4.5vw,22px);font-weight:800;background:#fff;color:var(--mut);box-shadow:0 3px 0 var(--line)}
.tabs button.on{background:var(--p);color:#fff;box-shadow:0 3px 0 rgba(0,0,0,.18)}
.sems{display:flex;gap:8px;margin-bottom:14px;flex-wrap:wrap}
.sems button{border:2px solid var(--line);background:#fff;border-radius:999px;padding:8px 18px;min-height:46px;font-weight:700;font-size:15px;color:var(--mut)}
.sems button.on{border-color:var(--p);color:var(--p);background:#fff}
.grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
@media(min-width:620px){.grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media(min-width:920px){.grid{grid-template-columns:repeat(4,minmax(0,1fr))}}
.tile{border:0;background:var(--card);border-radius:var(--r);padding:14px 10px 12px;display:flex;flex-direction:column;align-items:center;gap:4px;text-align:center;box-shadow:0 4px 0 var(--line);min-width:0;transition:transform .08s}
.tile:active{transform:translateY(3px);box-shadow:0 1px 0 var(--line)}
.tile .ic{width:clamp(56px,16vw,76px);display:block}
.tile .ic svg{width:100%;height:auto;display:block}
.tn{font-weight:800;font-size:clamp(15px,3.8vw,17px);line-height:1.25;margin-top:4px}
.td{font-size:13px;color:var(--mut);line-height:1.3}
.tb{display:flex;gap:2px;margin-top:4px}
.st svg{width:18px;height:18px;color:#e3ddf3;display:block}
.st.on svg{color:#ffb703}

/* Màn chơi */
.bar{display:flex;align-items:center;gap:8px}
.ibtn{border:0;background:#fff;width:46px;height:46px;border-radius:14px;display:grid;place-items:center;color:var(--p);box-shadow:0 3px 0 var(--line);flex:none}
.ibtn svg{width:24px;height:24px}
.mid{flex:1;min-width:0}
.gname{font-weight:800;font-size:15px;color:var(--mut);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;margin-bottom:5px}
.prog{display:flex;gap:4px}
.prog i{flex:1;height:9px;border-radius:9px;background:#fff;box-shadow:inset 0 0 0 1.500px var(--line)}
.prog i.ok{background:var(--ok);box-shadow:none}.prog i.no{background:#ffb3c1;box-shadow:none}.prog i.cur{background:var(--p2);box-shadow:none}
.stage{display:grid;gap:12px;margin-top:12px}
@media(min-width:760px){.stage{grid-template-columns:minmax(0,1.05fr) minmax(0,1fr);align-items:start}}
@media(max-height:500px) and (min-width:480px){.stage{grid-template-columns:minmax(0,1fr) minmax(0,1fr);align-items:start}}
.qcard,.acard{background:var(--card);border-radius:var(--r);padding:16px;box-shadow:0 4px 0 var(--line);min-width:0}
.qtext{font-size:clamp(18px,4.4vw,22px);line-height:1.45}
.qtext p{margin:0 0 8px}
.qtext b{color:var(--p)}
.story,.sent{background:var(--bg1);border-radius:14px;padding:12px 14px}
.sent{font-size:clamp(19px,4.6vw,24px);font-weight:600}
.sent b{text-decoration:underline;text-decoration-thickness:3px;text-underline-offset:4px}
.expr{font-size:clamp(28px,8vw,44px);font-weight:800;text-align:center;padding:10px 4px;letter-spacing:.5px;overflow-wrap:anywhere}
.expr.word{color:var(--p)}
.hole{display:inline-block;min-width:1.2em;padding:0 .2em;border-radius:10px;background:#fff3c4;color:#b06a00;text-align:center}
.roman{font-family:Georgia,"Times New Roman",serif;letter-spacing:1px}
.frac{display:inline-flex;flex-direction:column;vertical-align:middle;text-align:center;font-size:.8em;line-height:1.1;margin:0 2px}
.frac i{font-style:normal;padding:0 4px}.frac i:first-child{border-bottom:2px solid currentColor}
.qvis{display:flex;justify-content:center;margin-bottom:10px;overflow-x:auto}
.fig{width:100%;max-width:300px;max-height:230px;height:auto}
.tk{border-collapse:collapse;font-size:clamp(14px,3.6vw,17px);width:100%}
.tk caption{font-weight:800;margin-bottom:6px}
.tk th,.tk td{border:2px solid var(--line);padding:8px 4px;text-align:center}
.tk th{background:var(--bg1)}.tk td{font-weight:800;font-size:1.15em}

.ans.mc{display:grid;gap:10px;grid-template-columns:repeat(2,minmax(0,1fr))}
.ans.mc[data-cols="1"]{grid-template-columns:minmax(0,1fr)}
.ans.mc[data-cols="3"]{grid-template-columns:repeat(3,minmax(0,1fr))}
.ans.mc[data-cols="4"]{grid-template-columns:repeat(4,minmax(0,1fr))}
.opt{border:2.500px solid var(--line);background:#fff;border-radius:16px;padding:14px 8px;font-size:clamp(18px,4.6vw,23px);font-weight:700;min-height:62px;min-width:0;overflow-wrap:anywhere;line-height:1.3}
.opt:active{transform:scale(.98)}
.opt.right{border-color:var(--ok);background:var(--okbg);color:#11694a}
.opt.wrong{border-color:var(--no);background:var(--nobg);color:#a11f3b;animation:shake .35s}
.opt:disabled{cursor:default}.opt:disabled:not(.right):not(.wrong){opacity:.55}
.disp{display:flex;align-items:baseline;justify-content:center;gap:8px;border:2.500px solid var(--line);border-radius:16px;min-height:64px;padding:8px 12px;font-weight:800;margin-bottom:10px}
.disp .v{font-size:clamp(30px,8vw,40px)}.disp .v i{font-style:normal;color:#c9c2e3}
.disp .u{font-size:20px;color:var(--mut)}
.disp.right{border-color:var(--ok);background:var(--okbg)}.disp.wrong{border-color:var(--no);background:var(--nobg);animation:shake .35s}
.pad{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;max-width:340px;margin:0 auto}
.key{border:0;border-radius:16px;background:var(--bg1);font-size:26px;font-weight:800;height:clamp(52px,13vw,64px);box-shadow:0 3px 0 var(--line);display:grid;place-items:center}
.key:active{transform:translateY(2px);box-shadow:0 1px 0 var(--line)}
.key svg{width:28px;height:28px}
.kdel{background:#fff;color:var(--mut)}.kok{background:var(--ok);color:#fff;box-shadow:0 3px 0 #17805b}
.line{min-height:66px;border:2.500px dashed var(--p2);border-radius:16px;padding:8px;display:flex;flex-wrap:wrap;gap:8px;align-content:flex-start;margin-bottom:12px}
.line.right{border-style:solid;border-color:var(--ok);background:var(--okbg)}.line.wrong{border-style:solid;border-color:var(--no);background:var(--nobg);animation:shake .35s}
.bank{display:flex;flex-wrap:wrap;gap:8px;min-height:50px;margin-bottom:12px}
.chip{border:2.500px solid var(--line);background:#fff;border-radius:14px;padding:10px 14px;font-size:clamp(17px,4.4vw,21px);font-weight:700;box-shadow:0 3px 0 var(--line)}
.line .chip{border-color:var(--p2);background:var(--bg1)}
.btn{border:0;border-radius:16px;background:var(--p);color:#fff;font-weight:800;font-size:19px;padding:14px 22px;box-shadow:0 4px 0 rgba(0,0,0,.18)}
.btn:active{transform:translateY(2px)}
.btn:disabled{opacity:.45;cursor:default}
.btn.alt{background:#fff;color:var(--p);box-shadow:0 4px 0 var(--line)}
.btn.check{width:100%}
.fb{margin-top:12px;border-radius:16px;padding:12px 14px;font-size:18px;line-height:1.45}
.fb.good{background:var(--okbg);color:#11694a;text-align:center}
.fb.retry{background:#fff3c4;color:#7a4b00;text-align:center}
.fb.bad{background:var(--nobg);color:#7d1830}
.fb .ca{font-weight:800;font-size:1.15em}
.fb .why{margin:8px 0 12px;color:var(--ink)}
.fb .next{width:100%}
@keyframes shake{25%{transform:translateX(-6px)}50%{transform:translateX(6px)}75%{transform:translateX(-4px)}}

/* Màn kết thúc */
#done{display:grid;place-items:center;min-height:90vh}
.dcard{background:#fff;border-radius:28px;padding:28px 22px;text-align:center;box-shadow:0 6px 0 var(--line);max-width:460px;width:100%;position:relative;z-index:1}
.dstars{display:flex;justify-content:center;gap:8px}
.dstars .st svg{width:clamp(54px,16vw,76px);height:auto}
.dstars .st.on{animation:pop .5s backwards}.dstars .st.on:nth-child(2){animation-delay:.18s}.dstars .st.on:nth-child(3){animation-delay:.36s}
.dcard h2{font-size:clamp(22px,6vw,30px);margin:14px 0 6px;color:var(--p)}
.dcard p{font-size:19px;margin:0 0 20px;color:var(--mut);font-weight:700}
.dbtns{display:grid;gap:12px}
.confetti{position:fixed;inset:0;overflow:hidden;pointer-events:none}
.confetti i{position:absolute;top:-20px;width:10px;height:16px;border-radius:3px;animation:fall linear forwards}
@keyframes fall{to{transform:translateY(110vh) rotate(720deg)}}
@keyframes pop{from{transform:scale(0) rotate(-40deg)}60%{transform:scale(1.25)}}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}

/* Ảnh gia đình và màn nhập mã */
.photo{display:block;max-width:100%;max-height:32vh;width:auto;height:auto;border-radius:16px;object-fit:contain}
@media(min-width:760px){.photo{max-height:58vh}}
@media(max-height:500px) and (min-width:480px){.photo{max-height:62vh}}
.note{background:#fff3c4;color:#7a4b00;border-radius:14px;padding:10px 14px;font-weight:700;margin:0 0 12px}
#pin{display:grid;place-items:center;min-height:90vh}
#pin .dcard p{font-size:16px;font-weight:600}
.pdisp{font-size:26px;letter-spacing:6px;color:var(--p);align-items:center}
.pmsg{color:var(--no)!important;min-height:1.4em;margin:12px 0!important}
.ava{width:48px;height:48px;border-radius:50%;object-fit:cover;border:3px solid #fff;box-shadow:0 2px 0 var(--line);flex:none}
.ava.big{width:96px;height:96px;margin:0 auto 8px;display:block}