:root{
  --bg:#EEF7E8;
  --paper:#FFFFFF;
  --ink:#1E3A28;
  --ink-soft:#56705F;
  --leaf:#2F8F46;
  --leaf-deep:#1F6B32;
  --leaf-soft:#DDF1D6;
  --line:#C7E2BD;
  --red:#D93A2B;
  --red-soft:#FDE4E0;
  --sun:#FFC23D;
  --sun-soft:#FFF2CC;
  --sky:#3C8FD8;
  --sky-soft:#E1EFFB;
  --display:"Baloo 2","Segoe UI",system-ui,sans-serif;
  --body:"Nunito","Segoe UI",system-ui,sans-serif;
  --emoji:"Segoe UI Emoji","Apple Color Emoji","Noto Color Emoji",sans-serif;
  --r:20px;
  color-scheme:light;
}
*{box-sizing:border-box}
html,body{min-height:100%}
body{margin:0;background:var(--bg) url(assets/img/nen-la.webp) center/cover fixed;color:var(--ink);font-family:var(--body);font-size:18px;line-height:1.5;-webkit-tap-highlight-color:transparent}
button{font:inherit;color:inherit;cursor:pointer}
button:focus-visible,a:focus-visible,[tabindex]:focus-visible,input:focus-visible{outline:3px solid var(--sun);outline-offset:3px}
img{max-width:100%;display:block}
h1,h2,h3{font-family:var(--display);line-height:1.15;margin:0;text-wrap:balance}
p{margin:0}
.emo{font-family:var(--emoji);line-height:1}

/* ---------- top bar ---------- */
.top{position:sticky;top:0;z-index:20;background:rgba(238,247,232,.9);backdrop-filter:blur(8px);border-bottom:2px solid var(--line)}
.top-in{max-width:1180px;margin:0 auto;padding:10px 16px;display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:8px;font-family:var(--display);font-weight:800;font-size:21px;color:var(--leaf-deep);text-decoration:none}
.brand-dot{width:34px;height:34px;border-radius:50%;background:var(--leaf-soft);display:grid;place-items:center;font-family:var(--emoji);font-size:18px}
.progress{flex:1 1 160px;display:flex;align-items:center;gap:10px;min-width:140px}
.bar{flex:1;height:12px;border-radius:99px;background:var(--line);overflow:hidden}
.bar i{display:block;height:100%;width:0;background:var(--leaf);border-radius:99px;transition:width .5s}
.progress small{font-weight:800;color:var(--ink-soft);font-variant-numeric:tabular-nums}
.tools{display:flex;gap:6px}
.tool{display:inline-flex;align-items:center;gap:6px;border:2px solid var(--line);background:var(--paper);border-radius:99px;padding:5px 14px;font-weight:800;font-size:15px}
.tool>span:first-child{font-family:var(--emoji)}
.tool[aria-pressed="false"]{opacity:.5}

main{max-width:1180px;margin:0 auto;padding:24px 16px 80px;outline:none}
main:focus,main:focus-visible{outline:none}

/* ---------- buttons, chips ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:0;border-radius:99px;padding:12px 24px;font-weight:800;font-size:18px;background:var(--leaf);color:#fff;box-shadow:0 4px 0 var(--leaf-deep);transition:transform .1s}
.btn:active{transform:translateY(3px);box-shadow:0 1px 0 var(--leaf-deep)}
a.btn{text-decoration:none}
.btn:disabled{opacity:.45;cursor:not-allowed}
.btn.ghost{background:var(--paper);color:var(--leaf-deep);box-shadow:0 4px 0 var(--line);border:2px solid var(--line)}
.btn.sun{background:var(--sun);color:var(--ink);box-shadow:0 4px 0 #D99B14}
.btn.small{padding:8px 16px;font-size:16px}
.btn .emo{font-size:1.1em}

.card{background:var(--paper);border-radius:var(--r);box-shadow:0 6px 0 var(--line),0 10px 30px rgba(31,107,50,.08);padding:24px}
.pill{display:inline-block;border-radius:99px;padding:3px 12px;font-weight:800;font-size:14px;background:var(--leaf-soft);color:var(--leaf-deep)}
.pill.red{background:var(--red-soft);color:var(--red)}
.pill.sun{background:var(--sun-soft);color:#8A5A00}
.muted{color:var(--ink-soft)}
.grid{display:grid;gap:16px}

/* ---------- home ---------- */
.hero{display:grid;grid-template-columns:1.25fr .75fr;gap:24px;align-items:center;padding:32px}
.hero .sub{font-family:var(--display);font-weight:700;color:var(--leaf);font-size:20px}
.hero h1{font-size:clamp(40px,7vw,72px);color:var(--red);font-weight:800;margin:4px 0 12px;letter-spacing:.5px}
.hero p{font-size:19px;max-width:34em;margin-bottom:22px}
.hero img{max-height:320px;margin-inline:auto}
.part{margin-top:34px}
.part h2{font-size:26px;color:var(--leaf-deep);margin-bottom:12px;display:flex;align-items:center;gap:10px}
.stages{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:16px}
.stage-card{display:flex;gap:14px;align-items:flex-start;text-align:left;border:2px solid var(--line);background:var(--paper);border-radius:var(--r);padding:16px;box-shadow:0 4px 0 var(--line);transition:transform .15s}
.stage-card:hover{transform:translateY(-3px)}
.stage-card .ic{flex:none;width:54px;height:54px;border-radius:16px;background:var(--leaf-soft);display:grid;place-items:center;font-size:28px;font-family:var(--emoji)}
.stage-card b{display:block;font-family:var(--display);font-size:20px;line-height:1.2}
.stage-card small{display:block;color:var(--ink-soft);font-size:15px;line-height:1.35;margin-top:2px}
.stage-card .no{font-size:13px;font-weight:800;color:var(--leaf)}
.stage-card.done{border-color:var(--leaf)}
.stage-card.done .ic{background:var(--leaf);color:#fff}

/* ---------- stage frame ---------- */
.stage-head{display:flex;align-items:center;gap:16px;flex-wrap:wrap;margin-bottom:20px}
.stage-head .ic{width:64px;height:64px;border-radius:18px;background:var(--paper);box-shadow:0 4px 0 var(--line);display:grid;place-items:center;font-size:34px;font-family:var(--emoji)}
.stage-head h1{font-size:clamp(28px,4.5vw,42px);color:var(--red)}
.stage-head .grow{flex:1;min-width:220px}
.stage-head p{color:var(--ink-soft);font-weight:700}
.stage-nav{display:flex;justify-content:space-between;gap:12px;margin-top:28px;flex-wrap:wrap}

/* ---------- speech bubble ---------- */
.bubble{position:relative;background:var(--paper);border:3px solid var(--sun);border-radius:22px;padding:16px 20px;font-weight:800;font-size:22px;line-height:1.35}
.teacher{display:grid;grid-template-columns:200px 1fr;gap:18px;align-items:end}
.teacher img{width:200px}

/* ---------- S1 find ---------- */
.s1{display:grid;grid-template-columns:1fr 1fr;gap:24px;align-items:start}
.video{width:100%;border-radius:var(--r);background:#000;aspect-ratio:16/9}
.find{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}
.find button{aspect-ratio:1;border:3px solid var(--line);background:var(--paper);border-radius:18px;display:grid;place-items:center;align-content:center;gap:4px;padding:6px;box-shadow:0 4px 0 var(--line)}
.find .emo{font-size:40px}
.find small{font-weight:800;font-size:13px;line-height:1.2}
.find button.ok{border-color:var(--leaf);background:var(--leaf-soft)}
.find button.ok::after{content:"✓";position:absolute}
.find button{position:relative}
.find button.ok::after{top:4px;right:8px;color:var(--leaf);font-weight:800}

/* ---------- S2 guess ---------- */
.rules summary{cursor:pointer;font-family:var(--display);font-weight:800;font-size:20px;color:var(--leaf-deep)}
.rules ul{margin:10px 0 0;padding-left:22px}
.rules li{margin:4px 0}
.s2{display:grid;grid-template-columns:230px 1fr;gap:20px;margin-top:20px}
.tool-list{display:grid;gap:10px;align-content:start}
.tool-list button{display:flex;align-items:center;gap:12px;border:2px solid var(--line);background:var(--paper);border-radius:16px;padding:10px 14px;font-weight:800;text-align:left;box-shadow:0 3px 0 var(--line)}
.tool-list button .emo{font-size:28px;width:34px;text-align:center}
.tool-list button[aria-current="true"]{border-color:var(--sun);background:var(--sun-soft)}
.tool-list button.solved{border-color:var(--leaf)}
.clues{list-style:none;margin:0;padding:0;display:grid;gap:8px}
.clues li{background:var(--sun-soft);border-radius:14px;padding:8px 14px;font-weight:800;animation:pop .35s}
.choices{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;margin-top:14px}
.choice{border:3px solid var(--line);background:var(--paper);border-radius:16px;padding:12px;font-weight:800;font-size:19px;box-shadow:0 3px 0 var(--line)}
.choice.right{border-color:var(--leaf);background:var(--leaf-soft)}
.choice.wrong{border-color:var(--red);background:var(--red-soft)}
.reveal{display:grid;grid-template-columns:auto 1fr;gap:20px;align-items:start;animation:pop .4s}
.reveal .big{font-size:96px;font-family:var(--emoji);line-height:1}
.reveal h2{font-size:36px;color:var(--leaf-deep)}
.box{border-radius:16px;padding:12px 16px;margin-top:10px}
.box.risk{background:var(--red-soft)}
.box.safe{background:var(--leaf-soft)}
.box b{display:block;font-family:var(--display);font-size:18px}
.box ul{margin:4px 0 0;padding-left:22px}
.conclusion{display:grid;grid-template-columns:1fr 1fr;gap:20px;align-items:center;margin-top:20px;background:var(--red-soft);border:3px dashed var(--red)}
.conclusion p{font-family:var(--display);font-weight:800;font-style:italic;font-size:24px;color:var(--red);line-height:1.3}

/* ---------- S3 sort / drag ---------- */
.pool{display:flex;flex-wrap:wrap;gap:10px;min-height:64px;justify-content:center;padding:14px;border-radius:var(--r);background:rgba(255,255,255,.6);border:2px dashed var(--line)}
.chip{display:inline-flex;align-items:center;gap:8px;border:2px solid var(--line);background:var(--paper);border-radius:14px;padding:8px 14px;font-weight:800;font-size:17px;box-shadow:0 3px 0 var(--line);touch-action:none;user-select:none;cursor:grab;position:relative;z-index:1}
.chip .emo{font-size:24px}
.chip.sel{border-color:var(--sun);background:var(--sun-soft);box-shadow:0 0 0 4px rgba(255,194,61,.45)}
.chip.dragging{z-index:50;cursor:grabbing;box-shadow:0 12px 24px rgba(0,0,0,.18);transition:none}
.chip.placed{cursor:default;box-shadow:none}
.zones{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:18px}
.zone{border-radius:var(--r);padding:16px;min-height:220px;border:3px dashed;display:flex;flex-direction:column;gap:10px;transition:transform .15s}
.zone h2{font-size:26px;display:flex;align-items:center;gap:8px}
.zone.safe{background:var(--leaf-soft);border-color:var(--leaf)}
.zone.safe h2{color:var(--leaf-deep)}
.zone.danger{background:var(--red-soft);border-color:var(--red)}
.zone.danger h2{color:var(--red)}
.zone.hover{transform:scale(1.02)}
.zone .items{display:flex;flex-wrap:wrap;gap:8px}

/* ---------- S4 jobs ---------- */
.s4-top{display:grid;grid-template-columns:1fr 1fr;gap:20px;align-items:center}
.tabs{display:flex;gap:10px;flex-wrap:wrap}
.tab{border:3px solid var(--line);background:var(--paper);border-radius:99px;padding:8px 18px;font-weight:800;font-size:18px;display:inline-flex;gap:8px;align-items:center}
.tab[aria-selected="true"]{border-color:var(--sun);background:var(--sun-soft)}
.tab.done{border-color:var(--leaf)}
.tab.done::after{content:"✓";color:var(--leaf)}
.items-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:12px;margin-top:16px}
.item{border:3px solid var(--line);background:var(--paper);border-radius:18px;padding:12px 6px;display:grid;justify-items:center;gap:4px;font-weight:800;box-shadow:0 3px 0 var(--line)}
.item .emo{font-size:40px}
.item[aria-pressed="true"]{border-color:var(--sky);background:var(--sky-soft)}
.item.bad{border-color:var(--red);background:var(--red-soft)}
.item.good{border-color:var(--leaf);background:var(--leaf-soft)}

/* ---------- S5 match ---------- */
.match{display:grid;grid-template-columns:1fr 1fr;gap:28px;max-width:760px;margin:0 auto}
.match .col{display:grid;gap:12px}
.match button{display:flex;align-items:center;gap:12px;border:3px solid var(--line);background:var(--paper);border-radius:18px;padding:12px 18px;font-weight:800;font-size:20px;box-shadow:0 3px 0 var(--line);min-height:68px}
.match button .emo{font-size:34px}
.match button.sel{border-color:var(--sun);background:var(--sun-soft)}
.match button.paired{border-color:var(--leaf);background:var(--leaf-soft);cursor:default}
.match .col.parts button{justify-content:center}
.match .col.gear button>span:last-child{text-align:left}
.gear-note{margin-top:18px;text-align:center;font-weight:800;min-height:1.5em;color:var(--leaf-deep);font-size:20px}

/* ---------- S6 rules board ---------- */
.s6{display:grid;grid-template-columns:1.1fr .9fr;gap:20px;align-items:start}
.qnav{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:14px}
.qnav button{width:44px;height:44px;border-radius:50%;border:3px solid var(--line);background:var(--paper);font-weight:800;font-size:18px}
.qnav button[aria-current="true"]{border-color:var(--sun);background:var(--sun)}
.qnav button.seen{border-color:var(--leaf)}
.q-big{font-family:var(--display);font-weight:800;font-size:28px;line-height:1.25;margin:6px 0 16px}
.suggest{display:grid;gap:10px}
.suggest button{text-align:left;border:2px dashed var(--leaf);background:var(--paper);border-radius:14px;padding:10px 14px;font-weight:700;display:flex;gap:10px;align-items:center}
.suggest button::before{content:"+";font-weight:800;color:var(--leaf);font-size:22px;width:20px}
.suggest button[aria-pressed="true"]{border-style:solid;background:var(--leaf-soft)}
.suggest button[aria-pressed="true"]::before{content:"✓"}
.add-own{display:flex;gap:8px;margin-top:14px}
.add-own input{flex:1;min-width:0;border:2px solid var(--line);border-radius:14px;padding:10px 14px;font:inherit}
.board{background:#2F5D3A;color:#fff;border:10px solid #A0703C;border-radius:14px;padding:20px 22px;box-shadow:0 8px 24px rgba(0,0,0,.18)}
.board h2{font-size:26px;color:var(--sun);text-align:center;margin-bottom:12px}
.board ol{margin:0;padding-left:26px;display:grid;gap:8px;font-size:18px;font-weight:700}
.board li button{margin-left:6px;border:0;background:none;color:#FFB4A8;font-size:16px;padding:0 4px}
.board .empty{text-align:center;opacity:.75;font-style:italic}
.board-actions{display:flex;gap:10px;justify-content:center;margin-top:14px;flex-wrap:wrap}

/* ---------- S7 steps ---------- */
.s7{display:grid;grid-template-columns:1fr 1fr;gap:24px;align-items:start}
.steps-pool{display:grid;gap:10px}
.steps-pool button{display:flex;align-items:center;gap:12px;border:3px solid var(--line);background:var(--paper);border-radius:16px;padding:12px 16px;font-weight:800;font-size:19px;text-align:left;box-shadow:0 3px 0 var(--line)}
.steps-pool button .emo{font-size:30px}
.steps-pool button.used{visibility:hidden}
.steps-done{list-style:none;margin:0;padding:0;display:grid;gap:10px;counter-reset:st}
.steps-done li{counter-increment:st;display:flex;align-items:center;gap:12px;background:var(--leaf-soft);border:3px solid var(--leaf);border-radius:16px;padding:12px 16px;font-weight:800;font-size:19px;animation:pop .35s}
.steps-done li::before{content:counter(st);flex:none;width:34px;height:34px;border-radius:50%;background:var(--leaf);color:#fff;display:grid;place-items:center}
.steps-done li .emo{font-size:26px}
.steps-done .slot{border:3px dashed var(--line);border-radius:16px;min-height:60px;display:grid;place-items:center;color:var(--ink-soft);font-weight:700}

/* ---------- S8 quiz ---------- */
.quiz{max-width:860px;margin:0 auto;text-align:center}
.quiz .qno{font-weight:800;color:var(--ink-soft)}
.quiz h2{font-size:clamp(26px,4vw,36px);margin:10px 0 18px}
.timer{height:14px;border-radius:99px;background:var(--line);overflow:hidden;margin-bottom:18px}
.timer i{display:block;height:100%;background:var(--sun);width:100%}
.timer.low i{background:var(--red)}
.opts{display:grid;grid-template-columns:1fr 1fr;gap:14px;text-align:left}
.opt{display:flex;align-items:center;gap:12px;border:3px solid var(--line);background:var(--paper);border-radius:18px;padding:14px 16px;font-weight:800;font-size:20px;box-shadow:0 4px 0 var(--line)}
.opt .l{flex:none;width:40px;height:40px;border-radius:50%;background:var(--sky-soft);color:var(--sky);display:grid;place-items:center;font-family:var(--display);font-size:22px}
.opt.right{border-color:var(--leaf);background:var(--leaf-soft)}
.opt.right .l{background:var(--leaf);color:#fff}
.opt.wrong{border-color:var(--red);background:var(--red-soft)}
.opt.wrong .l{background:var(--red);color:#fff}
.opt:disabled{cursor:default}
.score{font-family:var(--display);font-size:64px;font-weight:800;color:var(--leaf)}
.badge{width:200px;height:200px;margin:10px auto;border-radius:50%;background:radial-gradient(circle at 35% 30%,#FFE58A,var(--sun) 60%,#E0A21A);display:grid;place-items:center;box-shadow:0 0 0 10px var(--sun-soft),0 10px 30px rgba(224,162,26,.4);animation:pop .6s}
.badge span{font-family:var(--emoji);font-size:88px}
.bell{font-family:var(--emoji);font-size:110px;display:inline-block;animation:ring 1.4s ease-in-out infinite}

/* ---------- S9 home ---------- */
.s9{display:grid;grid-template-columns:1fr 280px;gap:24px;align-items:center}
.todo{list-style:none;margin:0;padding:0;display:grid;gap:10px}
.todo label{display:flex;align-items:flex-start;gap:14px;background:var(--paper);border:3px solid var(--line);border-radius:16px;padding:12px 16px;cursor:pointer;box-shadow:0 3px 0 var(--line)}
.todo input{width:26px;height:26px;margin-top:4px;accent-color:var(--leaf);flex:none}
.todo .emo{font-size:32px}
.todo b{display:block;font-size:19px}
.todo small{color:var(--ink-soft);font-size:16px;font-weight:700}
.todo input:checked~span b{text-decoration:line-through;text-decoration-color:var(--leaf);text-decoration-thickness:3px}
.bye{text-align:center;margin-top:28px;padding:28px}
.bye h2{font-size:clamp(34px,6vw,60px);color:var(--red)}

/* ---------- tiếng Anh: chữ xanh dương, nút loa nhỏ ---------- */
.en{display:block;font-family:var(--display);font-weight:700;color:#2A6BA6;font-size:.85em;line-height:1.2}
.en::before{content:"EN";display:inline-block;font-family:var(--body);font-size:10px;font-weight:800;letter-spacing:.05em;background:var(--sky-soft);color:#2A6BA6;border-radius:5px;padding:0 4px;margin-right:5px;vertical-align:2px}
.en.big{display:inline;font-size:30px}
.en.big::before{font-size:12px;vertical-align:6px}
h2 .en,h1+.stage-en .en,.hero-en .en,.box.english p .en,.w-head .en{display:inline}
.say-en{display:inline-grid;place-items:center;width:34px;height:34px;border-radius:50%;border:2px solid var(--sky);background:var(--paper);font-family:var(--emoji);font-size:16px;vertical-align:middle;padding:0;line-height:1}
.say-en:active{transform:scale(.92)}
.hero-en{font-size:24px!important;margin:-6px 0 12px!important}
.stage-en{font-size:20px;margin:2px 0 4px}
.stage-card .en{font-size:15px;margin:2px 0 1px}
.find .en{font-size:12px;text-align:center}
.find .en::before,.item .en::before{display:none}
.item .en{font-size:14px}
.zone h2 .en{font-size:20px;margin-left:4px}
.zone.danger h2 .en{color:#A93A26}
.zone.danger h2 .en::before{background:#fff;color:#A93A26}
.box.english{background:var(--sky-soft);border:2px dashed var(--sky)}
.box.english p{margin-top:6px;display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.box.english small{font-size:15px;font-weight:700}
.match button .en{font-size:16px}
.gear-en{text-align:center;font-family:var(--display);font-weight:700;color:#2A6BA6;font-size:22px;min-height:1.5em;margin-top:4px}
.board-en{text-align:center;font-family:var(--display);color:#BFE3FF;font-size:18px;margin:-8px 0 10px}
.slogan{text-align:center;font-family:var(--display);font-weight:800;color:var(--sun);font-size:24px;margin-top:14px}
.nam-says{display:flex;gap:12px;align-items:center;margin-top:14px}
.nam-says>.emo{font-size:52px}
.en-bubble{border-color:var(--sky);font-size:20px}
.en-bubble p{color:#2A6BA6;font-family:var(--display);display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.en-bubble small{font-weight:700;color:var(--ink-soft);font-size:15px}
.steps-done li .en{font-size:16px}
.en-pill{background:var(--sky-soft);color:#2A6BA6;margin-top:6px}
.quiz h2[lang="en"]{color:#2A6BA6}
.q-vi{font-weight:700;margin:-10px 0 16px}
.opt .emo{font-size:28px}
.todo .en{font-size:16px;margin:1px 0 2px}
.bye-en{font-family:var(--display);font-weight:800;color:#2A6BA6;font-size:28px;margin-top:4px}

/* ---------- sổ từ vựng ---------- */
.words{width:min(980px,calc(100% - 24px));max-height:calc(100% - 24px);border:0;border-radius:var(--r);padding:20px 22px 26px;background:var(--bg);color:var(--ink);box-shadow:0 20px 60px rgba(0,0,0,.3)}
.words::backdrop{background:rgba(30,58,40,.45)}
.w-head{display:flex;justify-content:space-between;align-items:center;gap:12px}
.w-head h2{font-size:clamp(24px,4vw,32px);color:var(--leaf-deep)}
.w-head .en{font-size:20px;margin-left:6px}
.w-bar{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;margin:14px 0 4px}
.w-tip{font-weight:700}
.w-game-bar{display:flex;gap:12px;align-items:center;flex-wrap:wrap;font-size:18px}
.w-fb{font-weight:800;min-width:8em}
.w-fb.good{color:var(--leaf-deep)}
.w-fb.bad{color:var(--red)}
.w-group{margin-top:16px}
.w-group h3{font-size:20px;color:var(--leaf-deep);margin-bottom:8px}
.w-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:10px}
.w-card{display:grid;justify-items:center;gap:2px;border:3px solid var(--line);background:var(--paper);border-radius:16px;padding:10px 8px;box-shadow:0 3px 0 var(--line);text-align:center}
.w-card .emo{font-size:36px}
.w-card b{font-family:var(--display);font-size:19px;color:#2A6BA6;line-height:1.15}
.w-card small{font-weight:700;color:var(--ink-soft);font-size:14px}
.w-card.on{border-color:var(--sky);background:var(--sky-soft)}
.w-card.right{border-color:var(--leaf);background:var(--leaf-soft)}

/* ---------- toast, confetti, animation ---------- */
.toast{position:fixed;left:50%;bottom:24px;transform:translate(-50%,40px);opacity:0;background:var(--ink);color:#fff;padding:12px 22px;border-radius:99px;font-weight:800;font-size:18px;z-index:60;transition:.3s;pointer-events:none;max-width:calc(100% - 32px);text-align:center}
.toast.show{transform:translate(-50%,0);opacity:1}
.toast.good{background:var(--leaf)}
.toast.bad{background:var(--red)}
#confetti{position:fixed;inset:0;width:100%;height:100%;pointer-events:none;z-index:70}
.shake{animation:shake .4s}
@keyframes shake{20%,60%{transform:translateX(-8px)}40%,80%{transform:translateX(8px)}}
@keyframes pop{from{transform:scale(.85);opacity:0}to{transform:none;opacity:1}}
@keyframes ring{0%,60%,100%{transform:rotate(0)}10%,30%,50%{transform:rotate(14deg)}20%,40%{transform:rotate(-14deg)}}

/* ---------- responsive ---------- */
@media (max-width:900px){
  .hero,.s1,.s2,.s4-top,.s6,.s7,.s9,.conclusion{grid-template-columns:1fr}
  .hero img{max-height:220px}
  .items-grid,.find{grid-template-columns:repeat(4,1fr)}
  .tool-list{grid-template-columns:repeat(3,1fr)}
  .s9 img{max-width:220px;margin:0 auto}
}
@media (max-width:560px){
  body{font-size:17px}
  .tool-label{display:none}
  .hero{padding:22px}
  .items-grid,.find{grid-template-columns:repeat(3,1fr)}
  .tool-list{grid-template-columns:repeat(2,1fr)}
  .zones,.opts,.choices,.match{grid-template-columns:1fr}
  .match{gap:14px}
  .teacher{grid-template-columns:1fr}
  .teacher img{width:130px}
  .reveal{grid-template-columns:1fr}
  .reveal .big{font-size:72px}
  .bubble{font-size:19px}
  .words{padding:14px}
  .w-grid{grid-template-columns:repeat(2,1fr)}
  .w-card b{font-size:17px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
}
@media print{
  body{background:#fff}
  body *{visibility:hidden}
  .board,.board *{visibility:visible}
  .board{position:absolute;inset:0 0 auto 0;background:#fff;color:#000;border:4px solid #000}
  .board h2{color:#000}
  .board li button,.board-actions,.board .say-en{display:none}
  .board-en,.slogan{color:#000}
}