/* VƯỜN SỐ — toán vui cho bé. Grandstander (tiêu đề, số) · Quicksand (thân) · Playpen Sans (chữ viết tay, phấn)
   Giấy vở ô li kem #FFFBF1 · xanh lá #2FA84F · CTA cam #FF7A1A · nắng #FFC93C · mực navy #1F2A5A · bảng đen #243F31 */
[hidden]{display:none!important}
:root{
  --paper:#FFFBF1;--paper2:#FFF4DE;--grid:rgba(96,165,250,.16);--grid2:rgba(96,165,250,.3);--margin:#F9A8B8;
  --green:#2FA84F;--green-d:#1D7A36;--green-l:#E6F6E9;--orange:#FF7A1A;--orange-d:#D35F0A;--orange-l:#FFF0E3;--sun:#FFC93C;--sun-d:#D9A01B;
  --blue:#1E88E5;--pink:#E5487C;--purple:#8E44E0;--teal:#0FA3A3;--red:#E53950;
  --ink:#1F2A5A;--muted:#5E6784;--line:#EFE4CC;--card:#fff;--board:#243F31;--wood:#9A6A3C;
  --sh1:0 1px 0 rgba(31,42,90,.04),0 10px 28px -10px rgba(31,42,90,.16);--sh2:0 24px 50px -18px rgba(31,42,90,.28);
  --fd:'Grandstander',system-ui,sans-serif;--fb:'Quicksand',system-ui,sans-serif;--fw:'Playpen Sans',cursive;
  --w:1200px;--gx:clamp(16px,3.5vw,40px);--ease:cubic-bezier(.16,1,.3,1);--bounce:cubic-bezier(.34,1.56,.64,1)
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;font:600 1rem/1.6 var(--fb);color:var(--ink);background:var(--paper);-webkit-font-smoothing:antialiased;overflow-x:hidden}
img{max-width:100%;height:auto;display:block}
a{color:var(--green-d);text-decoration:none}
a:hover{text-decoration:underline;text-underline-offset:3px}
h1,h2,h3,h4{font-family:var(--fd);font-weight:800;line-height:1.1;letter-spacing:-.015em;margin:0 0 .45em;color:var(--ink);text-wrap:balance}
h1{font-size:clamp(2.3rem,5.6vw,4.4rem)}
h2{font-size:clamp(1.8rem,3.6vw,2.8rem)}
h3{font-size:1.2rem;font-family:var(--fb);font-weight:700;letter-spacing:-.01em}
p{margin:0 0 1em}
b,strong{font-weight:700}
button,input,select,textarea{font:inherit;color:inherit}
.i{width:1em;height:1em;fill:currentColor;flex:none;vertical-align:-.125em}
.wrap{max-width:var(--w);margin:0 auto;padding:0 var(--gx)}
.skip{position:absolute;left:-999px;top:8px;background:var(--ink);color:#fff;padding:10px 16px;border-radius:12px;z-index:200}
.skip:focus{left:8px}
:focus-visible{outline:3px solid var(--sun);outline-offset:2px}
.muted{color:var(--muted)}
.hand{font-family:var(--fw);font-weight:500}
/* vở ô li: lưới ô nhỏ + đường đậm mỗi 4 ô */
.oli{background-color:var(--paper);background-image:linear-gradient(var(--grid2) 1px,transparent 1px),linear-gradient(90deg,var(--grid2) 1px,transparent 1px),linear-gradient(var(--grid) 1px,transparent 1px),linear-gradient(90deg,var(--grid) 1px,transparent 1px);background-size:64px 64px,64px 64px,16px 16px,16px 16px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font:700 .82rem/1 var(--fb);color:var(--green-d);background:var(--green-l);padding:8px 14px;border-radius:999px;margin-bottom:14px}
.eyebrow .i{color:var(--green)}
.sec{padding:clamp(64px,8vw,110px) 0;position:relative}
.sec-cream{background:var(--paper2)}
.sec-white{background:#fff}
.sec-h{display:flex;justify-content:space-between;align-items:end;gap:24px;margin-bottom:40px;flex-wrap:wrap}
.sec-h.c{flex-direction:column;align-items:center;text-align:center}
.sec-h h2{margin:0;max-width:820px}
.sec-h p{margin:.6em 0 0;color:var(--muted);max-width:620px;font-size:1.06rem}
.mark{background:linear-gradient(transparent 58%,rgba(255,201,60,.7) 58%,rgba(255,201,60,.7) 90%,transparent 90%);padding:0 .08em}

/* ---------- nút ---------- */
.btn{--b:var(--green);--s:var(--green-d);--t:#fff;position:relative;display:inline-flex;align-items:center;justify-content:center;gap:9px;min-height:52px;padding:0 26px;border-radius:999px;border:0;background:var(--b);color:var(--t);
  font:700 1.02rem/1 var(--fb);cursor:pointer;box-shadow:0 4px 0 var(--s),0 10px 22px -8px color-mix(in srgb,var(--b) 70%,transparent);transition:transform .18s var(--bounce),box-shadow .12s,filter .15s;text-decoration:none!important;white-space:nowrap}
.btn:hover{transform:translateY(-2px);filter:brightness(1.05)}
.btn:active{transform:translateY(3px);box-shadow:0 1px 0 var(--s)}
.btn[disabled]{opacity:.45;pointer-events:none}
.btn-cta{--b:var(--orange);--s:var(--orange-d)}
.btn-ghost{--b:#fff;--s:var(--line);--t:var(--ink);box-shadow:0 3px 0 var(--line),inset 0 0 0 1.5px var(--line)}
.btn-sun{--b:var(--sun);--s:var(--sun-d);--t:var(--ink)}
.btn.sm{min-height:42px;padding:0 18px;font-size:.93rem}
.btn.lg{min-height:62px;padding:0 34px;font-size:1.15rem}
.chip{display:inline-flex;align-items:center;gap:6px;min-height:40px;padding:0 16px;border-radius:999px;border:1.5px solid var(--line);background:#fff;font-weight:700;font-size:.92rem;cursor:pointer;color:var(--ink)}
.chip.on{background:var(--ink);color:#fff;border-color:var(--ink)}

/* ---------- header ---------- */
.hdr{position:sticky;top:0;z-index:60;background:rgba(255,251,241,.9);backdrop-filter:saturate(1.4) blur(14px);border-bottom:1.5px solid transparent;transition:border-color .2s,box-shadow .2s}
.hdr.scrolled{border-color:var(--line);box-shadow:0 10px 30px -18px rgba(31,42,90,.25)}
.hdr-in{display:flex;align-items:center;gap:22px;min-height:76px}
.logo{display:flex;align-items:center;gap:10px;color:var(--ink);text-decoration:none!important;flex:none}
.logo .bee{width:48px;height:44px}
.lg-t{display:flex;flex-direction:column;line-height:1}
.lg-n{font:800 1.55rem/1 var(--fd);letter-spacing:-.02em;color:var(--ink)}
.lg-n em{font-style:normal;color:var(--green)}
.lg-t small{font:700 .66rem/1 var(--fb);letter-spacing:.14em;text-transform:uppercase;color:var(--orange);margin-top:4px}
.nav{display:flex;gap:2px;margin-left:8px}
.nav a{padding:10px 14px;border-radius:999px;color:var(--ink);font-weight:700;font-size:.97rem;text-decoration:none;white-space:nowrap}
.nav a:hover{background:#fff}
.nav a.active{background:var(--green-l);color:var(--green-d)}
.hdr-r{display:flex;align-items:center;gap:8px;margin-left:auto}
.hud{display:flex;align-items:center;gap:6px}
.hud-grade{white-space:nowrap;display:inline-flex;align-items:center;height:38px;padding:0 14px;border-radius:999px;background:var(--g);color:#fff!important;font:800 .88rem/1 var(--fd);text-decoration:none!important}
.hud-pill{display:inline-flex;align-items:center;gap:5px;height:38px;padding:0 11px;border-radius:999px;background:#fff;border:1.5px solid var(--line);font:700 .92rem/1 var(--fb)}
.hud-pill .i{color:var(--sun-d)}
.hud-pill.seed .i{color:var(--green)}
.hud-pill.fire .i{color:#C9C3B0}
.hud-pill.fire.lit .i{color:var(--orange);animation:flick 1.6s ease-in-out infinite}
@keyframes flick{50%{transform:scale(1.15) rotate(6deg)}}
.menu-btn{display:none;width:46px;height:46px;border-radius:50%;border:1.5px solid var(--line);background:#fff;cursor:pointer;align-items:center;justify-content:center;font-size:1.15rem;color:var(--ink)}
.drawer{position:fixed;inset:0;z-index:90;pointer-events:none;overflow:hidden}
.drawer-bg{position:absolute;inset:0;background:rgba(31,42,90,.4);opacity:0;transition:opacity .25s}
.drawer-p{position:absolute;top:10px;right:10px;bottom:10px;width:min(88vw,370px);background:var(--paper);border-radius:28px;padding:18px;transform:translateX(110%);transition:transform .35s var(--ease);display:flex;flex-direction:column;gap:4px;overflow:auto}
.drawer.open{pointer-events:auto}.drawer.open .drawer-bg{opacity:1}.drawer.open .drawer-p{transform:none}
.drawer-p a:not(.btn):not(.logo){padding:12px 16px;border-radius:16px;color:var(--ink);font-weight:700;text-decoration:none}
.drawer-p a.active{background:var(--green-l)}
.drawer-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:10px}
.drawer-x{width:44px;height:44px;border-radius:50%;border:0;background:#fff;cursor:pointer}
.dr-label{font:700 .72rem/1 var(--fb);letter-spacing:.14em;text-transform:uppercase;color:var(--muted);padding:16px 16px 6px}
.drawer .hud{padding:10px;background:#fff;border-radius:20px;margin-bottom:8px;flex-wrap:wrap}

/* ---------- hero ---------- */
.hero{position:relative;padding:clamp(34px,5vw,64px) 0 clamp(60px,7vw,90px);overflow:hidden;isolation:isolate}
.hero::before{content:"";position:absolute;left:clamp(12px,6vw,90px);top:0;bottom:0;width:2px;background:var(--margin);opacity:.7;z-index:-1}
.hero-head{text-align:center;max-width:900px;margin:0 auto}
.hero h1{margin-bottom:.3em}
.hero h1 .g{color:var(--green)}
.hero .lead{font-size:1.18rem;color:var(--muted);max-width:640px;margin:0 auto 26px;font-weight:600}
.grades{display:flex;gap:8px;flex-wrap:wrap;justify-content:center;margin-bottom:28px}
.grades button{display:inline-flex;align-items:center;gap:7px;min-height:44px;padding:0 18px;border-radius:999px;border:2px solid var(--line);background:#fff;font:800 .98rem/1 var(--fd);cursor:pointer;color:var(--ink);transition:all .2s var(--bounce)}
.grades button i{width:10px;height:10px;border-radius:50%;background:var(--g)}
.grades button:hover{transform:translateY(-2px);border-color:var(--g)}
.grades button.on{background:var(--g);border-color:var(--g);color:#fff}
.grades button.on i{background:#fff}
.grades .lbl{font:700 .9rem/44px var(--fb);color:var(--muted);margin-right:4px}
.stage{position:relative;max-width:1060px;margin:0 auto;background:#fff;border-radius:34px;box-shadow:var(--sh2),0 0 0 1.5px var(--line);overflow:hidden}
.stage-bar{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:14px 22px;border-bottom:1.5px dashed var(--line);font-weight:700;font-size:.92rem;color:var(--muted)}
.stage-bar b{color:var(--ink)}
.stage-bar .dots{display:flex;gap:6px}.stage-bar .dots i{width:11px;height:11px;border-radius:50%;background:#FF6B6B}.stage-bar .dots i:nth-child(2){background:var(--sun)}.stage-bar .dots i:nth-child(3){background:var(--green)}
.stage-in{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,1fr);min-height:440px}
.bed{position:relative;display:grid;grid-template-columns:repeat(5,1fr);align-items:end;gap:6px;padding:40px 22px 26px;background:linear-gradient(180deg,#DDF3FF 0%,#EFFAFF 55%,#E6F6E9 55.1%,#CDEBC9 100%);min-height:300px}
.bed .sun{position:absolute;left:26px;top:22px;width:62px;height:62px;border-radius:50%;background:radial-gradient(circle,#FFE27A 0 55%,rgba(255,226,122,.35) 56%,transparent 72%);animation:spinS 18s linear infinite}
@keyframes spinS{to{transform:rotate(360deg)}}
.bed .cl{position:absolute;height:26px;border-radius:26px;background:#fff;opacity:.95;animation:drift2 26s linear infinite}
.bed .cl::before{content:"";position:absolute;width:34px;height:34px;border-radius:50%;background:#fff;left:14px;top:-16px}
.bed .c1{width:90px;top:40px;left:40%}.bed .c2{width:70px;top:78px;left:70%;animation-duration:34s;animation-delay:-12s}
@keyframes drift2{0%{transform:translateX(0)}50%{transform:translateX(-60px)}100%{transform:translateX(0)}}
.bed .bf{position:absolute;width:30px;top:120px;left:30%;animation:bfly 9s ease-in-out infinite;z-index:2}
@keyframes bfly{0%,100%{transform:translate(0,0)}25%{transform:translate(120px,-40px)}50%{transform:translate(220px,10px)}75%{transform:translate(80px,30px)}}
.bed::after{content:"";position:absolute;left:14px;right:14px;bottom:18px;height:54px;border-radius:14px;background:linear-gradient(#B07A45,#8B5A2B);box-shadow:inset 0 5px 0 rgba(255,255,255,.18);z-index:0}
.pot{position:relative;z-index:1;display:flex;justify-content:center}
.pot .plant{width:128%;max-width:160px;margin:0 -14%;height:auto;transform-origin:bottom center}
.pot.grow .plant{animation:grow .7s var(--bounce)}
@keyframes grow{0%{transform:scale(.7,.5)}60%{transform:scale(1.08,1.12)}100%{transform:none}}
.can{position:absolute;top:8px;left:50%;width:78px;margin-left:-39px;z-index:3;opacity:0;pointer-events:none;transition:left .35s var(--ease)}
.can.pour{animation:pour 1.05s var(--ease)}
.can i{position:absolute;right:2px;top:40px;width:5px;height:12px;border-radius:5px;background:#5AB7FF;opacity:0}
.can.pour i{animation:drop .7s .25s linear infinite}
.can.pour i:nth-child(3){animation-delay:.38s;right:-6px}.can.pour i:nth-child(4){animation-delay:.5s;right:8px}
@keyframes pour{0%{opacity:0;transform:translateY(-12px)}20%{opacity:1;transform:rotate(-18deg)}80%{opacity:1;transform:rotate(-30deg)}100%{opacity:0}}
@keyframes drop{0%{opacity:1;transform:translateY(0)}100%{opacity:0;transform:translateY(70px)}}
.stage-q{padding:24px clamp(18px,3vw,32px);display:flex;flex-direction:column;justify-content:center;border-left:1.5px dashed var(--line)}
.stage .bee-fly{position:absolute;right:26px;top:66px;width:76px;z-index:4;animation:fly 5s ease-in-out infinite}
@keyframes fly{0%,100%{transform:translate(0,0) rotate(-4deg)}25%{transform:translate(-18px,-10px) rotate(4deg)}50%{transform:translate(-6px,8px) rotate(-2deg)}75%{transform:translate(10px,-6px) rotate(3deg)}}
.bee .wing{transform-origin:center bottom;transform-box:fill-box;animation:flap .18s ease-in-out infinite alternate}
@keyframes flap{to{transform:scaleY(.6)}}
.bee.zz .wing{animation:none}
.hero-proof{display:flex;justify-content:center;gap:clamp(18px,4vw,48px);margin-top:30px;flex-wrap:wrap}
.hero-proof div{display:flex;align-items:center;gap:10px;font-weight:700;color:var(--muted);font-size:.95rem}
.hero-proof .i{font-size:1.3rem;color:var(--green);background:var(--green-l);width:42px;height:42px;padding:11px;border-radius:50%}
.doodle{position:absolute;z-index:-1;font:800 clamp(2rem,5vw,4rem)/1 var(--fd);color:rgba(30,136,229,.12);user-select:none;pointer-events:none}

/* ---------- khung câu hỏi ---------- */
.qbox{position:relative}
.qbox.shake{animation:shake .38s}
@keyframes shake{20%{transform:translateX(-8px)}40%{transform:translateX(7px)}60%{transform:translateX(-5px)}80%{transform:translateX(3px)}}
.q-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:10px}
.q-n{font:700 .82rem/1 var(--fb);color:var(--muted);background:var(--paper2);padding:7px 12px;border-radius:999px}
.q-say{width:42px;height:42px;border-radius:50%;border:0;background:var(--green-l);color:var(--green-d);cursor:pointer;display:grid;place-items:center;font-size:1.05rem;transition:transform .2s var(--bounce)}
.q-say:hover{transform:scale(1.1)}
.q-text{font:800 clamp(1.35rem,2.8vw,1.85rem)/1.3 var(--fd);text-align:center;margin:10px 0 18px;color:var(--ink)}
.q-text.long{font-size:clamp(1.1rem,2.2vw,1.35rem);line-height:1.45}
.q-text b{color:var(--orange-d)}
.q-sub{text-align:center;font:800 1.1rem/1 var(--fd);color:var(--muted);margin:-6px 0 14px}
.q-big{text-align:center;font:800 clamp(3rem,8vw,4.6rem)/1 var(--fd);margin:14px 0 22px;color:var(--purple)}
.q-opts{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.q-opts.n3{grid-template-columns:repeat(3,1fr)}
.q-opts.n2{grid-template-columns:1fr 1fr}
.q-opt{display:flex;align-items:center;justify-content:center;gap:10px;min-height:62px;padding:10px 14px;border-radius:20px;border:2px solid var(--line);background:#fff;box-shadow:0 4px 0 var(--line);cursor:pointer;font:800 1.2rem/1.2 var(--fd);color:var(--ink);transition:transform .12s,box-shadow .12s,border-color .15s,background .15s;position:relative}
.q-opt kbd{position:absolute;left:10px;top:8px;font:700 .68rem/1 var(--fb);color:#B8AF97}
.q-opt:hover:not(:disabled){border-color:var(--green);transform:translateY(-2px)}
.q-opt:active:not(:disabled){transform:translateY(4px);box-shadow:none}
.q-opt:disabled{cursor:default}
.q-opt.ok{background:var(--green-l);border-color:var(--green);box-shadow:0 4px 0 var(--green);color:var(--green-d);animation:pop .35s var(--bounce)}
.q-opt.bad{background:#FFE6EA;border-color:var(--red);box-shadow:0 4px 0 var(--red);color:#A11A33}
@keyframes pop{0%{transform:scale(.85)}100%{transform:scale(1)}}
/* hình minh hoạ */
.vis{display:flex;justify-content:center;align-items:center;gap:10px;margin:4px 0 6px;flex-wrap:wrap}
.vis-count{max-width:340px;margin:0 auto 6px}
.vis .fr{width:44px;height:44px;display:inline-block;animation:pop .4s var(--bounce) both}
.vis .fr svg{width:100%;height:100%}
.vis-two .grp{display:flex;flex-wrap:wrap;gap:4px;max-width:150px;justify-content:center;padding:10px;border:2px dashed var(--line);border-radius:18px}
.vis-two .fr{width:34px;height:34px}
.vis .plus{font:800 1.6rem/1 var(--fd);color:var(--muted)}
.vis-shape svg{width:110px;height:110px}
.vis-seq span{width:48px;height:48px;display:inline-grid;place-items:center}
.vis-seq svg{width:44px;height:44px}
.vis-seq .q{font:800 2rem/1 var(--fd);color:var(--orange);border:2.5px dashed var(--orange);border-radius:12px}
.clk{width:140px;height:140px}
.clk .hh,.clk .mh{transform-origin:60px 60px;transition:transform .35s var(--bounce)}
.clk.big{width:min(240px,62vw);height:auto}
.clk.mini{width:60px;height:60px;vertical-align:middle}
.vis-bills{gap:6px}
.bill{display:inline-flex;flex-direction:column;justify-content:center;align-items:center;width:92px;height:48px;border-radius:8px;background:linear-gradient(135deg,var(--b1),var(--b2));color:#fff;box-shadow:0 3px 0 rgba(0,0,0,.18),inset 0 0 0 3px rgba(255,255,255,.35);position:relative;overflow:hidden}
.bill::before{content:"";position:absolute;right:-12px;top:-12px;width:40px;height:40px;border-radius:50%;background:rgba(255,255,255,.18)}
.bill b{font:800 1rem/1 var(--fd)}.bill small{font:700 .6rem/1 var(--fb);opacity:.9}
.geo{width:min(300px,80vw);height:auto}
.geo text{font:700 12px var(--fb);fill:var(--ink)}
.vis-fr .pie{width:86px;height:86px}
.barm{width:min(340px,90%);display:grid;gap:8px;margin:0 auto}
.barm div{display:flex;align-items:center;gap:8px;font:700 .8rem var(--fb)}
.barm span{width:60px;flex:none;color:var(--muted)}
.barm i{display:block;height:22px;border-radius:6px;background:var(--pink)}
.barm i.s{background:var(--blue)}
.barm em{font-style:normal;height:22px;border-radius:6px;border:2px dashed var(--pink);font-size:.7rem;display:grid;place-items:center;color:var(--pink)}
.barm.unit i{background:var(--teal);margin-right:2px}
/* kết thúc ván */
.vs-end{text-align:center;padding:10px 0}
.end-stars{display:flex;justify-content:center;gap:8px;margin-bottom:10px}
.end-stars span{font-size:3rem;color:#E7DFC8;animation:pop .5s var(--bounce) both}
.end-stars span.on{color:var(--sun);filter:drop-shadow(0 4px 0 var(--sun-d))}
.vs-end h3{font:800 2rem/1.1 var(--fd)}
.end-sc{font-size:1.05rem;color:var(--muted)}.end-sc b{color:var(--ink);font:800 1.4rem var(--fd)}
.end-new{display:inline-flex;align-items:center;gap:12px;background:var(--green-l);border-radius:20px;padding:10px 18px;margin:6px 0 14px}
.end-new .plant{width:70px}
.end-new p{margin:0;font-weight:700}
.end-hint{color:var(--muted);font-size:.92rem}
.end-btns{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin-top:6px}
.bee-z{width:120px;margin:0 auto 8px}
/* tia số */
.line{position:relative;height:150px;margin:20px 12px 6px}
.water{position:absolute;left:-12px;right:-12px;bottom:18px;height:40px;border-radius:20px;background:linear-gradient(#9ED8FF,#6CC3F5)}
.pad{position:absolute;bottom:22px;width:44px;height:32px;margin-left:-22px;border:0;border-radius:50% 50% 50% 50%/60% 60% 40% 40%;background:#5DBB3F;box-shadow:inset 0 -4px 0 #3E9B36;cursor:pointer;transition:transform .2s var(--bounce)}
.pad span{position:absolute;left:50%;top:40px;transform:translateX(-50%);font:800 .95rem/1 var(--fd);color:var(--ink);white-space:nowrap}
.pad:hover{transform:translateY(-3px)}
.pad.ok{background:var(--sun);box-shadow:inset 0 -4px 0 var(--sun-d)}
.pad.bad{background:var(--red)}
.frog{position:absolute;bottom:44px;width:58px;margin-left:-29px;transition:left .32s var(--ease);z-index:2}
.frog.hop{animation:hop .36s ease-out}
@keyframes hop{50%{transform:translateY(-38px)}}
/* cửu chương */
.tbls{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.tbl{display:flex;flex-direction:column;gap:4px;align-items:center;padding:14px;border-radius:20px;border:2px solid var(--line);background:#fff;font:800 1.2rem/1 var(--fd);cursor:pointer;box-shadow:0 4px 0 var(--line);transition:transform .15s var(--bounce)}
.tbl:hover{transform:translateY(-3px);border-color:var(--purple)}
.tbl small{font:700 .75rem var(--fb);color:var(--muted)}
.race-top{display:flex;justify-content:space-between;align-items:center;font:800 1.1rem var(--fd)}
.clock-left b{font-size:1.6rem;color:var(--purple)}
.race-sc .i{color:var(--sun)}
.race-x{font:700 .85rem var(--fb);color:var(--muted);background:var(--paper2);padding:6px 12px;border-radius:999px}
.race-x.hot{background:var(--orange);color:#fff;animation:pop .3s var(--bounce)}
.race-bar{height:10px;border-radius:10px;background:var(--paper2);margin:10px 0;overflow:hidden}
.race-bar i{display:block;height:100%;background:linear-gradient(90deg,var(--purple),var(--pink));transition:width 1s linear}
/* cân */
.scale{position:relative;height:190px;margin:10px 0}
.beam{position:absolute;left:10%;right:10%;top:40px;height:10px;border-radius:6px;background:var(--wood);transition:transform .7s var(--bounce);transform-origin:center}
.beam.lvl{box-shadow:0 0 0 4px var(--sun)}
.pan{position:absolute;top:8px;width:40%;display:flex;gap:6px;justify-content:center;align-items:flex-end;min-height:70px;padding-bottom:8px;border-bottom:8px solid #C9A879;border-radius:0 0 60px 60px}
.pan.l{left:-4%}.pan.r{right:-4%}
.post{position:absolute;left:50%;top:48px;width:14px;height:130px;margin-left:-7px;background:var(--wood);border-radius:6px}
.post::after{content:"";position:absolute;left:-40px;bottom:0;width:94px;height:14px;border-radius:8px;background:var(--wood)}
.wt{display:inline-grid;place-items:center;min-width:64px;height:54px;padding:0 8px;border-radius:12px 12px 6px 6px;background:linear-gradient(#6B7A99,#48557A);color:#fff;font:800 .95rem/1 var(--fd)}
.wt.big{min-width:84px;height:64px;background:linear-gradient(#FF9F1C,#C46F00)}
.wt.q{background:#fff;color:var(--orange);border:2.5px dashed var(--orange)}
.wts{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin:6px 0 10px}
.wt-btn{min-width:88px;min-height:52px;border-radius:14px;border:2px solid var(--line);background:#fff;font:800 1rem var(--fd);cursor:pointer;box-shadow:0 4px 0 var(--line)}
.wt-btn.ok{background:var(--green-l);border-color:var(--green)}.wt-btn.bad{background:#FFE6EA;border-color:var(--red)}
/* cửa hàng */
.shop-item{display:flex;align-items:center;gap:16px;justify-content:center;margin:4px 0}
.shop-item svg{width:84px;height:84px;background:var(--paper2);border-radius:20px;padding:6px}
.shop-item b{display:block;font:800 1.3rem var(--fd)}
.tag{display:inline-block;margin-top:6px;background:var(--orange);color:#fff;font:800 1.15rem var(--fd);padding:6px 14px;border-radius:10px 999px 999px 10px;position:relative}
.tray{min-height:76px;border:2.5px dashed var(--line);border-radius:18px;display:flex;flex-wrap:wrap;gap:6px;align-items:center;justify-content:center;padding:10px;background:#FFFDF7}
.tray .empty{color:#B8AF97;font-weight:700}
.tray button,.wallet button{border:0;background:none;padding:0;cursor:pointer;transition:transform .15s var(--bounce)}
.tray button:hover,.wallet button:hover{transform:translateY(-3px) rotate(-2deg)}
.paid{text-align:center;margin:10px 0}
.wallet{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin-bottom:14px}
.shop .pay{display:flex;margin:0 auto}
/* đồng hồ */
.clk-wrap{display:flex;flex-direction:column;align-items:center;margin:4px auto 12px;border-radius:50%;transition:box-shadow .3s}
.clk-wrap.ok .clk{filter:drop-shadow(0 0 16px rgba(47,168,79,.6))}
.clk-wrap .fix{display:flex;align-items:center;gap:6px;font-weight:700;color:var(--red);margin:6px 0 0}
.clk-ctl{display:flex;gap:18px;justify-content:center;flex-wrap:wrap;margin-bottom:14px}
.clk-ctl div{display:flex;align-items:center;gap:6px;font-weight:700}
.clk-ctl button{width:46px;height:46px;border-radius:50%;border:2px solid var(--line);background:#fff;cursor:pointer;box-shadow:0 3px 0 var(--line)}
.qbox .done{display:flex;margin:0 auto}
.vs-confetti{position:fixed;inset:0;pointer-events:none;z-index:300}
.vs-toasts{position:fixed;left:50%;top:88px;transform:translateX(-50%);z-index:250;display:flex;flex-direction:column;gap:8px;align-items:center;width:min(92vw,420px);pointer-events:none}
.vs-toast{background:var(--ink);color:#fff;padding:12px 18px;border-radius:999px;box-shadow:var(--sh2);display:flex;gap:8px;align-items:center;flex-wrap:wrap;opacity:0;transform:translateY(-12px) scale(.92);transition:all .4s var(--bounce);font-weight:700}
.vs-toast.on{opacity:1;transform:none}
.vs-toast .i{color:var(--sun)}
.vs-toast.ok{background:var(--green)}.vs-toast.ok .i{color:#fff}
.vs-toast.gold{background:var(--orange)}.vs-toast.gold .i{color:#fff}

/* ---------- bìa vở lớp học ---------- */
.books{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:26px}
.book{position:relative;display:flex;flex-direction:column;border-radius:10px 24px 24px 10px;background:var(--g);color:#fff;padding:22px 22px 20px 38px;min-height:280px;text-decoration:none!important;box-shadow:var(--sh1),inset 10px 0 0 rgba(0,0,0,.12);transition:transform .3s var(--bounce);overflow:hidden;isolation:isolate}
.book:hover{transform:translateY(-6px) rotate(-1deg)}
.book::before{content:"";position:absolute;left:10px;top:18px;bottom:18px;width:10px;background:radial-gradient(circle,#FFFBF1 4px,transparent 4.5px) 0 0/10px 22px repeat-y}
.book::after{content:"";position:absolute;right:-60px;bottom:-60px;width:220px;height:220px;border-radius:50%;background:rgba(255,255,255,.12);z-index:-1}
.book .lbl{background:#fff;color:var(--ink);border-radius:12px;padding:12px 14px;box-shadow:0 3px 0 rgba(0,0,0,.12)}
.book .lbl small{display:block;font:700 .72rem/1 var(--fb);color:var(--muted);letter-spacing:.08em;text-transform:uppercase;margin-bottom:4px}
.book .lbl b{font:800 1.9rem/1 var(--fd);color:var(--gd)}
.book .lbl span{display:block;font-size:.84rem;color:var(--muted);border-top:1.5px dotted #D8D0BA;margin-top:8px;padding-top:6px}
.book p{margin:14px 0 12px;font-size:.93rem;color:rgba(255,255,255,.92);font-weight:600}
.book .ft{margin-top:auto;display:flex;justify-content:space-between;align-items:center;font:700 .86rem var(--fb)}
.book .ft b{background:rgba(255,255,255,.2);padding:7px 12px;border-radius:999px}
.book .ft .go{background:#fff;color:var(--gd);padding:8px 14px;border-radius:999px}
.book .eg{position:absolute;right:18px;top:18px;font:800 1rem/1 var(--fd);background:rgba(255,255,255,.2);padding:8px 10px;border-radius:12px;transform:rotate(4deg)}

/* ---------- gói hạt giống (trò chơi) ---------- */
.packets{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:28px}
.packet{position:relative;display:flex;flex-direction:column;background:#fff;color:var(--ink);text-decoration:none!important;padding:26px 18px 20px;border-radius:6px 6px 22px 22px;box-shadow:var(--sh1);transition:transform .3s var(--bounce);border-top:10px solid var(--c)}
.packet::before{content:"";position:absolute;left:0;right:0;top:-20px;height:12px;background:linear-gradient(135deg,transparent 50%,var(--c) 50%) 0 0/16px 12px repeat-x,linear-gradient(225deg,transparent 50%,var(--c) 50%) 0 0/16px 12px repeat-x}
.packet:hover{transform:translateY(-8px) rotate(1deg)}
.packet .win{position:relative;aspect-ratio:4/3;border-radius:16px;overflow:hidden;border:4px solid color-mix(in srgb,var(--c) 30%,#fff)}
.packet .win img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.packet .brand{position:absolute;left:10px;top:10px;background:#fff;border-radius:999px;padding:5px 10px;font:700 .7rem/1 var(--fb);color:var(--c);letter-spacing:.06em;text-transform:uppercase;box-shadow:0 2px 0 rgba(0,0,0,.08)}
.packet .ico{position:absolute;right:10px;bottom:-22px;width:52px;height:52px;border-radius:50%;background:var(--c);color:#fff;display:grid;place-items:center;font-size:1.4rem;border:4px solid #fff;z-index:1}
.packet h3{font:800 1.4rem/1.15 var(--fd);margin:20px 0 6px;color:var(--c);filter:brightness(.8)}
.packet p{font-size:.93rem;color:var(--muted);margin:0 0 14px}
.packet .meta{margin-top:auto;display:flex;justify-content:space-between;align-items:center;border-top:1.5px dashed var(--line);padding-top:12px;font:700 .82rem var(--fb)}
.packet .meta span{display:inline-flex;gap:6px;align-items:center}
.packet .meta b{color:#fff;background:var(--c);border-radius:999px;padding:8px 14px}

/* ---------- vườn ---------- */
.garden-box{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:40px;align-items:center}
.stages{display:grid;grid-template-columns:repeat(6,1fr);gap:6px;background:linear-gradient(180deg,#EAF7FF 0,#EAF7FF 62%,#C7E8BF 62.1%);border-radius:28px;padding:24px 14px 16px;box-shadow:var(--sh1)}
.stages div{text-align:center}
.stages .plant{width:100%}
.stages small{font:700 .8rem var(--fb);color:var(--green-d)}
.gsteps{display:grid;gap:14px;margin:22px 0}
.gsteps div{display:flex;gap:14px;align-items:flex-start}
.gsteps b{flex:none;width:40px;height:40px;border-radius:50%;background:var(--sun);display:grid;place-items:center;font:800 1.1rem var(--fd);box-shadow:0 3px 0 var(--sun-d)}
.gsteps p{margin:0;color:var(--muted)}
.gsteps p strong{color:var(--ink);display:block}
.gd-top{display:grid;grid-template-columns:repeat(3,auto) 1fr;gap:12px;align-items:stretch;margin-bottom:22px}
.gd-stat,.gd-next{background:#fff;border-radius:22px;padding:14px 18px;box-shadow:var(--sh1)}
.gd-stat b{display:block;font:800 1.9rem/1 var(--fd);color:var(--green)}
.gd-stat span,.gd-next span{font-size:.86rem;color:var(--muted);font-weight:700}
.bar{height:12px;border-radius:12px;background:var(--paper2);overflow:hidden;margin-top:8px}
.bar i{display:block;height:100%;border-radius:12px;background:linear-gradient(90deg,#8EDB6C,var(--green));transition:width .8s var(--ease)}
.plots{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:14px}
.plot{position:relative;aspect-ratio:1/1.12;border-radius:24px;background:linear-gradient(180deg,#EFFAFF 0,#EFFAFF 64%,#B98555 64.1%,#8B5A2B 100%);display:flex;flex-direction:column;align-items:center;justify-content:flex-end;padding:10px;overflow:hidden;box-shadow:var(--sh1)}
.plot .plant{width:88%;margin-bottom:-8%}
.plot b{position:absolute;left:10px;top:10px;background:#fff;border-radius:999px;padding:4px 10px;font:700 .78rem var(--fb)}
.plot small{position:absolute;right:10px;top:12px;font:700 .68rem var(--fb);color:var(--muted)}
.plot .lock{margin:auto;display:flex;flex-direction:column;align-items:center;color:#B7AE96;font-size:1.8rem}
.plot .lock small{position:static;margin-top:4px}
.plot:not(.has){background:repeating-linear-gradient(45deg,#FBF4E3 0 12px,#F6ECD5 12px 24px)}

/* ---------- phiếu bài tập ---------- */
.ws-grid{display:grid;grid-template-columns:minmax(0,340px) minmax(0,1fr);gap:28px;align-items:start}
.ws-form{position:sticky;top:96px;background:#fff;border-radius:26px;padding:22px;box-shadow:var(--sh1);display:grid;gap:14px}
.ws-form label.f{display:grid;gap:6px;font-weight:700;font-size:.92rem}
.ws-form select,.ws-form input[type=text]{min-height:48px;border-radius:14px;border:1.5px solid var(--line);padding:0 14px;background:#fff;font-weight:700}
.ck{display:flex;gap:10px;align-items:flex-start;padding:10px 12px;border-radius:14px;border:1.5px solid var(--line);cursor:pointer;font-weight:700;font-size:.92rem}
.ck input{margin-top:4px;accent-color:var(--green);width:18px;height:18px}
.ck small{display:block;font-weight:600;color:var(--muted);font-size:.76rem}
.ck:has(input:checked){border-color:var(--green);background:var(--green-l)}
.ws-skills{display:grid;gap:8px;max-height:360px;overflow:auto;padding-right:4px}
.sheet{background:#fff;border-radius:6px;box-shadow:var(--sh2);padding:34px 38px;margin-bottom:24px;aspect-ratio:auto;font-family:var(--fb)}
.sheet header{display:flex;gap:16px;align-items:center;border-bottom:2px solid var(--ink);padding-bottom:12px;margin-bottom:12px}
.sh-brand{display:flex;flex-direction:column;align-items:center;font:800 .9rem var(--fd)}
.sh-brand .bee{width:48px}
.sh-t{flex:1}.sh-t h2{font-size:1.45rem;margin:0}.sh-t p{margin:4px 0 0;color:var(--muted);font-size:.84rem}
.sh-code{text-align:center;font:700 .74rem var(--fb);color:var(--muted);border:1.5px dashed var(--muted);border-radius:10px;padding:6px 10px}
.sh-code b{display:block;font:800 1.15rem var(--fd);color:var(--ink)}
.sh-meta{display:flex;gap:18px;flex-wrap:wrap;font-size:.9rem;margin-bottom:16px}
.sh-list{list-style:none;padding:0;margin:0;display:grid;gap:14px 28px}
.sh-list.c2{grid-template-columns:1fr 1fr}
.sh-list li{display:flex;gap:10px;break-inside:avoid}
.sh-list .no{flex:none;width:28px;height:28px;border-radius:50%;border:1.5px solid var(--ink);display:grid;place-items:center;font:800 .82rem var(--fd)}
.sh-list p{margin:0 0 6px;font:700 1.02rem/1.4 var(--fb)}
.sh-list .vis{justify-content:flex-start;margin:0 0 4px}
.sh-list .vis .fr{width:26px;height:26px;animation:none}
.sh-list .vis-two .fr{width:22px;height:22px}
.sh-list .clk{width:84px;height:84px}
.sh-list .vis-shape svg{width:56px;height:56px}
.sh-list .vis-seq span{width:30px;height:30px}.sh-list .vis-seq svg{width:28px;height:28px}
.sh-list .bill{transform:scale(.8);margin:-4px}
.ans-line{display:block;height:26px;border-bottom:1.5px dotted #8C94AE;width:70%}
.ans-box{display:inline-block;width:36px;height:30px;border:1.5px solid #8C94AE;border-radius:6px}
.sheet footer{margin-top:22px;padding-top:10px;border-top:1px dashed var(--line);font-size:.78rem;color:var(--muted);text-align:center}
.keys{display:grid;grid-template-columns:repeat(4,1fr);gap:8px 16px;font-size:.95rem}
.ws-prev{position:relative;transform:rotate(-2deg);max-width:440px;margin:0 auto}
.ws-prev .sheet{padding:22px;font-size:.82rem}
.ws-prev .sheet h2{font-size:1.05rem}
.ws-prev::after{content:"";position:absolute;left:44%;top:-14px;width:90px;height:28px;background:rgba(255,201,60,.55);transform:rotate(3deg)}

/* ---------- phụ huynh ---------- */
.gate{text-align:center;padding:34px 22px;border-radius:26px;background:var(--paper2)}
.gate-ic{display:inline-grid;place-items:center;width:58px;height:58px;border-radius:50%;background:#fff;color:var(--orange);font-size:1.4rem;margin-bottom:8px}
.gate-f{display:flex;gap:8px;justify-content:center;margin-top:10px}
.gate-f input{width:140px;min-height:46px;border-radius:14px;border:1.5px solid var(--line);padding:0 14px;font-weight:800;text-align:center}
.rep-top{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-bottom:18px}
.rep-top div{background:var(--paper2);border-radius:18px;padding:14px;text-align:center}
.rep-top b{display:block;font:800 1.7rem/1 var(--fd);color:var(--green)}
.rep-top span{font-size:.8rem;color:var(--muted);font-weight:700}
.rep{list-style:none;padding:0;margin:8px 0 14px;display:grid;gap:8px}
.rep li{display:grid;grid-template-columns:1.2fr 1fr auto;gap:10px;align-items:center;font-size:.9rem}
.rep .bar{margin:0}
.rep b{font-size:.8rem;color:var(--muted);white-space:nowrap}
details summary{cursor:pointer;font:800 1.05rem var(--fd);padding:10px 0;list-style:none;display:flex;align-items:center;gap:8px}
details summary::before{content:"";width:12px;height:12px;border-radius:50%;background:var(--g)}
.weak{list-style:none;padding:0;margin:0 0 10px;display:grid;gap:8px}
.weak li{display:grid;grid-template-columns:1fr auto auto;gap:12px;align-items:center;background:#FFF4F6;border-radius:16px;padding:10px 14px}
.weak b{color:var(--red);font:800 1.1rem var(--fd)}
.weak small{color:var(--muted)}
.lims{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:12px}
.sw{display:flex;align-items:center;gap:12px;padding:8px 0;cursor:pointer;font-weight:700}
.sw input{position:absolute;opacity:0}
.sw span{width:52px;height:30px;border-radius:30px;background:#E4DCC6;position:relative;transition:background .2s}
.sw span::after{content:"";position:absolute;left:3px;top:3px;width:24px;height:24px;border-radius:50%;background:#fff;transition:transform .3s var(--bounce)}
.sw input:checked+span{background:var(--green)}.sw input:checked+span::after{transform:translateX(22px)}
.tb{width:100%;border-collapse:collapse;font-size:.9rem}
.tb th,.tb td{padding:9px 12px;border-bottom:1.5px solid var(--line);text-align:left}
.tb th{font-size:.74rem;text-transform:uppercase;letter-spacing:.08em;color:var(--muted)}
.dash{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:36px;align-items:center}
.dash-card{background:#fff;border-radius:28px;padding:22px;box-shadow:var(--sh2)}
.dash-card h4{font:800 1.1rem var(--fd);margin-bottom:12px;display:flex;justify-content:space-between}
.dash-card h4 small{font:700 .78rem var(--fb);color:var(--muted)}
.dash-rows{display:grid;gap:10px}
.dash-rows div{display:grid;grid-template-columns:130px 1fr 44px;gap:10px;align-items:center;font-size:.88rem;font-weight:700}
.dash-rows .bar{margin:0;height:14px}
.dash-rows em{font-style:normal;text-align:right;color:var(--muted)}
.ticks{list-style:none;padding:0;margin:18px 0 26px;display:grid;gap:12px}
.ticks li{display:flex;gap:12px;align-items:flex-start;font-weight:600}
.ticks .i{flex:none;margin-top:3px;color:#fff;background:var(--green);border-radius:50%;padding:4px;width:24px;height:24px}

/* ---------- thi đua ---------- */
.bd-head{display:flex;justify-content:space-between;align-items:center;background:var(--g);color:#fff;border-radius:20px;padding:14px 18px;margin-bottom:12px}
.bd-head b{font:800 1.3rem var(--fd)}
.bd-head span{font-size:.84rem;font-weight:700;opacity:.9}
.bd{list-style:none;padding:0;margin:0;display:grid;gap:6px}
.bd li{display:grid;grid-template-columns:40px 1fr auto 60px;gap:10px;align-items:center;padding:10px 14px;border-radius:16px;background:#fff;border:1.5px solid var(--line);font-weight:700}
.bd li.me{border-color:var(--orange);background:var(--orange-l)}
.bd .pos{text-align:center;color:var(--muted)}
.bd .pos i{display:inline-grid;place-items:center;width:30px;height:30px;border-radius:50%;font-style:normal;color:#fff;font:800 .95rem var(--fd)}
.bd .m0{background:#F2B705}.bd .m1{background:#A7B1C2}.bd .m2{background:#C98A5B}
.bd .pl{font-size:.82rem;color:var(--green-d)}
.bd b{font:800 1.1rem var(--fd);text-align:right}
.bd em{font-style:normal;font-size:.7rem;background:var(--orange);color:#fff;border-radius:999px;padding:2px 8px;vertical-align:2px}
.bd li:nth-child(n+9):not(.me){display:none}
.board-full .bd li:nth-child(n+9):not(.me){display:grid}
.ch-intro{text-align:center}

/* ---------- đánh giá giấy nhớ ---------- */
.notes{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:34px 26px;padding-top:10px}
.note{position:relative;background:var(--c,#FFF3A8);padding:26px 22px 18px;box-shadow:0 18px 26px -18px rgba(31,42,90,.4);transform:rotate(var(--r,-1.5deg));transition:transform .3s var(--bounce);border-radius:2px 2px 18px 2px}
.note:hover{transform:rotate(0) translateY(-4px)}
.note::before{content:"";position:absolute;left:50%;top:-12px;width:96px;height:26px;margin-left:-48px;background:rgba(255,255,255,.55);box-shadow:0 1px 2px rgba(0,0,0,.08);transform:rotate(-3deg)}
.note p{font:500 1.06rem/1.55 var(--fw);color:#2D2A1E;margin:0 0 14px}
.note .who{display:flex;gap:10px;align-items:center}
.note .who .ph{width:46px;height:46px;border-radius:50%;overflow:hidden;position:relative;flex:none;border:3px solid #fff}
.note .who .ph img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.note .who b{display:block;font-size:.95rem}
.note .who small{color:#6B6553;font-size:.8rem}
.note .st{color:#E0A100;font-size:.9rem;margin-bottom:6px;display:flex;gap:2px}

/* ---------- bảng giá, FAQ ---------- */
.bill-t{display:inline-flex;padding:6px;border-radius:999px;background:#fff;gap:4px;margin-bottom:36px;border:1.5px solid var(--line)}
.bill-t button{border:0;background:none;padding:10px 20px;border-radius:999px;font-weight:700;cursor:pointer;color:var(--muted)}
.bill-t button.on{background:var(--ink);color:#fff}
.bill-t em{font-style:normal;font-size:.72rem;background:var(--sun);color:var(--ink);padding:3px 7px;border-radius:999px;margin-left:4px}
.plans{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;align-items:stretch}
.plan{position:relative;display:flex;flex-direction:column;padding:28px 24px;border-radius:28px;background:#fff;box-shadow:var(--sh1);border:2px solid transparent}
.plan.hot{border-color:var(--green);box-shadow:var(--sh2);transform:translateY(-10px)}
.plan-flag{position:absolute;top:-16px;left:50%;transform:translateX(-50%);background:var(--green);color:#fff;font:800 .85rem var(--fd);padding:8px 16px;border-radius:999px;white-space:nowrap}
.plan h3{display:flex;gap:8px;align-items:center;font:800 1.4rem var(--fd)}
.plan h3 i{width:14px;height:14px;border-radius:50%;background:var(--c)}
.plan-p{font:800 2.5rem/1 var(--fd);margin:12px 0 4px}
.plan-p small{font:700 .9rem var(--fb);color:var(--muted)}
.plan-y{font-size:.86rem;color:var(--green-d);font-weight:700;min-height:1.4em}
.plan ul{list-style:none;padding:0;margin:16px 0 24px;display:grid;gap:10px}
.plan li{display:flex;gap:9px;font-size:.95rem}
.plan li .i{color:var(--green);margin-top:.25em}
.plan li.no{color:#B0A994;text-decoration:line-through}.plan li.no .i{color:#CFC7B2}
.plan .btn{margin-top:auto}
.faq{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;align-items:start}
.faq details{background:#fff;border-radius:20px;padding:0 20px;border:1.5px solid var(--line)}
.faq summary{font:700 1rem var(--fb);padding:18px 0;justify-content:space-between}
.faq summary::before{display:none}
.faq summary .i{color:var(--orange);transition:transform .25s}
.faq details[open] summary .i{transform:rotate(180deg)}
.faq details p{color:var(--muted);padding-bottom:18px;margin:0}

/* ---------- trang con ---------- */
.pghead{position:relative;padding:clamp(28px,4vw,52px) 0 clamp(40px,5vw,64px);overflow:hidden;isolation:isolate;border-bottom:1.5px solid var(--line)}
.pghead::before{content:"";position:absolute;left:clamp(12px,6vw,90px);top:0;bottom:0;width:2px;background:var(--margin);opacity:.7;z-index:-1}
.pghead h1{font-size:clamp(2rem,4.6vw,3.4rem);max-width:860px}
.pghead p.lead{color:var(--muted);max-width:720px;font-size:1.08rem}
.crumbs{display:flex;gap:8px;flex-wrap:wrap;font-size:.86rem;margin-bottom:16px;list-style:none;padding:0;font-weight:700;color:var(--muted)}
.crumbs li{display:flex;gap:8px;align-items:center}
.crumbs li+li::before{content:"›";opacity:.5}
.ph-grid{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(0,1fr);gap:36px;align-items:center}
.ph-grid .ph{position:relative;aspect-ratio:4/3;border-radius:28px;overflow:hidden;box-shadow:var(--sh2);transform:rotate(1.5deg);border:8px solid #fff}
.ph-grid .ph img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.ph{position:relative;overflow:hidden}
.ph>img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.page-body{padding:clamp(44px,6vw,76px) 0}
.split{display:grid;grid-template-columns:minmax(0,1.45fr) minmax(0,1fr);gap:28px;align-items:start}
.split>*{min-width:0}
.panel{background:#fff;border-radius:26px;padding:clamp(20px,3vw,28px);box-shadow:var(--sh1)}
.panel+.panel{margin-top:22px}
.panel h2{font-size:1.5rem}
.play-box{background:#fff;border-radius:30px;padding:clamp(18px,3vw,30px);box-shadow:var(--sh2);min-height:460px}
.rules{counter-reset:r;list-style:none;padding:0;margin:0;display:grid;gap:14px}
.rules li{position:relative;padding-left:44px}
.rules li::before{counter-increment:r;content:counter(r);position:absolute;left:0;top:-3px;width:32px;height:32px;border-radius:50%;background:var(--sun);font:800 1rem/32px var(--fd);text-align:center;box-shadow:0 3px 0 var(--sun-d)}
.facts{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin:18px 0 22px}
.facts div{padding:14px;border-radius:18px;background:#fff;border:1.5px solid var(--line)}
.facts b{display:block;font:800 1.05rem/1.2 var(--fd)}
.facts span{font-size:.8rem;color:var(--muted);font-weight:700}
.skills{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.skill{display:flex;flex-direction:column;background:#fff;border-radius:24px;padding:20px;box-shadow:var(--sh1);border-top:6px solid var(--g)}
.skill h3{font:800 1.25rem var(--fd);margin-bottom:4px}
.skill .sgk{font-size:.82rem;color:var(--muted);margin-bottom:10px}
.skill .ex{background:var(--paper2);border-radius:16px;padding:12px;text-align:center;margin-bottom:12px}
.skill .ex p{margin:6px 0 0;font:800 1.05rem var(--fd)}
.skill .ex .vis .fr{width:26px;height:26px}.skill .ex .clk{width:80px;height:80px}.skill .ex .vis-shape svg{width:60px;height:60px}.skill .ex .geo{width:200px}
.skill .ft{display:flex;justify-content:space-between;align-items:center;margin-top:auto}
.stars{display:flex;gap:2px;font-size:1.2rem;color:#E4DCC6}
.stars i.on{color:var(--sun)}
.practice{margin-top:12px}
.practice .qbox{background:var(--paper2);border-radius:20px;padding:16px}
.practice .q-opt{min-height:54px;font-size:1.05rem}
.stat-row{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
.stat{background:#fff;border-radius:24px;padding:22px;text-align:center;box-shadow:var(--sh1)}
.stat b{display:block;font:800 clamp(1.7rem,3vw,2.3rem)/1 var(--fd);color:var(--green);margin-bottom:6px}
.stat span{color:var(--muted);font-size:.9rem;font-weight:700}
.team{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.team>div{background:#fff;border-radius:26px;padding:10px 10px 18px;box-shadow:var(--sh1)}
.team .ph{aspect-ratio:4/3;border-radius:18px;margin-bottom:12px}
.team h3,.team small{padding:0 8px;display:block}
.team small{color:var(--muted)}
.arts{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}
.art{display:flex;flex-direction:column;background:#fff;border-radius:26px;overflow:hidden;box-shadow:var(--sh1);color:var(--ink);text-decoration:none!important;transition:transform .25s var(--bounce)}
.art:hover{transform:translateY(-4px)}
.art .ph{aspect-ratio:16/10}
.art-b{padding:18px}
.art-b small{font-size:.78rem;color:var(--muted);font-weight:700}
.art-b h3{margin:6px 0}
.art-b p{color:var(--muted);font-size:.9rem;margin:0}
.prose{max-width:720px;font-size:1.08rem}
.prose h2{font-size:1.5rem;margin-top:1.4em}
.contact-cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin-bottom:26px}
.cc-card{display:flex;gap:14px;align-items:center;padding:18px;border-radius:24px;background:#fff;box-shadow:var(--sh1);color:var(--ink);text-decoration:none!important;min-width:0}
.cc-card .i{font-size:1.2rem;color:#fff;flex:none;width:50px;height:50px;padding:14px;border-radius:50%;background:var(--green)}
.cc-card b{display:block}
.cc-card small{color:var(--muted);overflow-wrap:anywhere}
.form{display:grid;gap:14px}
.form .row2{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.fld{display:grid;gap:6px;font-weight:700;font-size:.92rem}
.fld input,.fld select,.fld textarea{min-height:50px;border-radius:14px;border:1.5px solid var(--line);padding:10px 14px;background:#fff;font-weight:600}
.fld textarea{min-height:120px;resize:vertical}
.fld .err{color:var(--red)}
.ok-card{background:var(--green);color:#fff;border-radius:26px;padding:26px;text-align:center}
.ok-card .code{font:800 1.8rem var(--fd);color:var(--sun);margin:8px 0}
.credits img{width:84px;height:56px;object-fit:cover;border-radius:10px}
.credits td{vertical-align:top;font-size:.86rem}
.tb-wrap{overflow-x:auto;background:#fff;border-radius:20px;box-shadow:var(--sh1)}
.e404{text-align:center}
.e404 .bee{width:160px;margin:0 auto 12px}

/* ---------- CTA + footer bảng đen ---------- */
.endcta{padding:clamp(60px,7vw,96px) 0}
.cta{position:relative;display:grid;grid-template-columns:auto minmax(0,1fr) auto;gap:clamp(20px,4vw,48px);align-items:center;background:var(--green);color:#fff;border-radius:36px;padding:clamp(28px,4vw,52px);overflow:hidden;isolation:isolate}
.cta::before{content:"";position:absolute;inset:0;z-index:-1;background-image:linear-gradient(rgba(255,255,255,.1) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.1) 1px,transparent 1px);background-size:22px 22px}
.cta .bee{width:clamp(110px,12vw,160px);animation:fly 5s ease-in-out infinite}
.cta h2{color:#fff;margin:0 0 8px;font-size:clamp(1.7rem,3.2vw,2.5rem)}
.cta p{margin:0;color:rgba(255,255,255,.9);font-weight:600}
.cta .btn{--b:#fff;--s:#CFE9D5;--t:var(--green-d)}
.ftr{background:var(--board);color:#D8E6DC;border-top:14px solid var(--wood);box-shadow:inset 0 6px 0 rgba(0,0,0,.18);position:relative;overflow:hidden;isolation:isolate}
.ftr::before{content:"";position:absolute;inset:0;z-index:-1;background:radial-gradient(800px 300px at 20% 10%,rgba(255,255,255,.07),transparent 70%),radial-gradient(600px 260px at 90% 80%,rgba(255,255,255,.05),transparent 70%)}
.ftr .wrap{padding-top:56px;padding-bottom:28px}
.ftr-grid{display:grid;grid-template-columns:1.4fr repeat(3,1fr);gap:32px}
.ftr h4{font:500 1.2rem/1 var(--fw);color:#fff;margin-bottom:16px}
.ftr a{color:#D8E6DC!important;display:block;padding:5px 0;font-weight:600}
.ftr a:hover{color:#fff!important}
.ftr .logo .lg-n{color:#fff}
.ftr .chalk{font:500 1.15rem/1.5 var(--fw);color:#fff;opacity:.92;margin:14px 0}
.ftr .cinfo{display:grid;gap:6px;font-size:.93rem}
.ftr .cinfo span{display:flex;gap:10px;align-items:center}
.ftr .cinfo .i{color:var(--sun)}
.ftr-soc{display:flex;gap:10px;margin-top:14px}
.ftr-soc a{width:42px;height:42px;border-radius:50%;background:rgba(255,255,255,.1);display:grid!important;place-items:center;padding:0!important}
.ftr-math{position:absolute;right:4%;top:40px;font:500 1.6rem/1.4 var(--fw);color:rgba(255,255,255,.12);text-align:right;pointer-events:none;z-index:-1}
.ftr-bot{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;border-top:1.5px dashed rgba(255,255,255,.2);margin-top:40px;padding-top:18px;font-size:.84rem;color:#A9C1B1}
.ftr-bot a{display:inline!important}
.chalk-tray{height:12px;background:linear-gradient(var(--wood),#7A5230)}
.mbar{display:none}
.reveal{opacity:0;transform:translateY(22px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.reveal.in{opacity:1;transform:none}

@media print{
  body{background:#fff}
  .hdr,.ftr,.pghead,.ws-form,.mbar,.endcta,.vs-toasts,[data-kp-demo],.no-print{display:none!important}
  .page-body{padding:0}.ws-grid{display:block}
  .sheet{box-shadow:none;border-radius:0;padding:0 0 0;margin:0;page-break-after:always}
  .sheet.key{page-break-after:auto}
}
@media (max-width:1060px){
  .nav a{padding:10px 10px;font-size:.92rem}
  .hud-pill.fire{display:none}
}
@media (max-width:960px){
  .nav,.hdr-r>.btn{display:none}
  .menu-btn{display:inline-flex}
  .stage-in,.garden-box,.dash,.split,.ph-grid,.ws-grid{grid-template-columns:minmax(0,1fr)}
  .stage-q{border-left:0;border-top:1.5px dashed var(--line)}
  .books,.packets,.notes,.plans,.arts{grid-template-columns:repeat(2,minmax(0,1fr))}
  .plan.hot{transform:none}
  .ftr-grid{grid-template-columns:1fr 1fr}
  .cta{grid-template-columns:1fr;text-align:center;justify-items:center}
  .stat-row{grid-template-columns:repeat(2,1fr)}
  .ws-form{position:static}
}
@media (max-width:640px){
  body{padding-bottom:86px}
  .hdr-in{min-height:64px;gap:8px}
  .lg-t small{display:none}
  .lg-n{font-size:1.3rem}
  .logo .bee{width:40px}
  .hud-pill{height:34px;padding:0 9px;font-size:.84rem}
  .hud-grade{height:34px;padding:0 10px;font-size:.8rem}
  .hud-pill.star{display:none}
  .books,.packets,.notes,.plans,.arts,.faq,.team,.skills,.contact-cards{grid-template-columns:minmax(0,1fr)}
  .bed{grid-template-columns:repeat(5,1fr);padding:30px 8px 20px;min-height:220px}
  .bed::after{left:6px;right:6px;height:40px}
  .q-opts.n3{grid-template-columns:repeat(3,1fr)}
  .q-opt{min-height:56px;font-size:1.05rem}
  .tbls{grid-template-columns:repeat(3,1fr)}
  .stage .bee-fly{width:54px;right:10px;top:54px}
  .gd-top{grid-template-columns:repeat(3,1fr)}.gd-next{grid-column:1/-1}
  .rep-top{grid-template-columns:repeat(2,1fr)}
  .rep li{grid-template-columns:1fr;gap:4px}
  .weak li{grid-template-columns:1fr auto}.weak li .btn{grid-column:1/-1}
  .sh-list.c2{grid-template-columns:1fr}
  .keys{grid-template-columns:repeat(2,1fr)}
  .sheet{padding:20px}
  .sheet header{flex-wrap:wrap}
  .dash-rows div{grid-template-columns:100px 1fr 40px}
  .ftr-grid{grid-template-columns:1fr 1fr}.ftr-grid>div:first-child{grid-column:1/-1}
  .form .row2{grid-template-columns:1fr}
  .line{margin:20px 4px 6px}.pad{width:30px;height:24px;margin-left:-15px}.pad span{font-size:.78rem;top:30px}.frog{width:44px;margin-left:-22px}
  .wt{min-width:52px;height:46px;font-size:.8rem}.wt.big{min-width:66px}
  .bill{width:78px;height:42px}
  .mbar{display:grid;grid-template-columns:1fr 1.4fr 1fr;gap:8px;position:fixed;left:10px;right:10px;bottom:10px;z-index:70;padding:8px;border-radius:999px;background:#fff;box-shadow:0 14px 34px -10px rgba(31,42,90,.35),0 0 0 1.5px var(--line)}
  .mbar a{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;min-height:54px;border-radius:999px;color:var(--ink);font:700 .72rem/1 var(--fb);text-decoration:none}
  .mbar a .i{font-size:1.1rem;color:var(--green)}
  .mbar .mb-cta{background:var(--orange);color:#fff;font:800 .98rem/1 var(--fd);box-shadow:0 4px 0 var(--orange-d)}
  .mbar .mb-cta .i{color:#fff}
}
@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important}.reveal{opacity:1;transform:none}}
.ftr a.logo{display:flex!important;padding:0!important}