:root{
  --paper:#FFF9EC; --card:#FFFFFF; --ink:#2E2A4F; --muted:#625E7D; --line:#EADFC8;
  --sun:#FFC93C; --sun-soft:#FFF0BF; --coral:#FF7B5C; --coral-soft:#FFE1D9; --coral-ink:#A93A1F;
  --leaf:#4DBB85; --leaf-soft:#D8F3E5; --leaf-ink:#1A6B46; --sky:#58B4EE; --sky-soft:#DBF0FD; --sky-ink:#14608F;
  --grape:#9A7CE3; --grape-soft:#EBE3FB; --grape-ink:#5A3BA8;
  --radius:24px; --shadow:0 5px 0 rgba(46,42,79,.1);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);font:400 17px/1.65 Sarabun,sans-serif}
h1,h2,h3,.brand,.btn,.chip,.nav a{font-family:Mali,Sarabun,sans-serif}
h1,h2,h3{line-height:1.3;margin:0}
a{color:inherit}
:focus-visible{outline:3px solid var(--grape-ink);outline-offset:3px;border-radius:8px}
.wrap{max-width:1120px;margin:0 auto;padding:0 20px}

/* header */
.top{background:var(--paper);border-bottom:2px solid var(--line)}
.top .wrap{display:flex;align-items:center;gap:14px;min-height:72px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:8px;font-weight:700;font-size:25px;text-decoration:none}
.brand span b{color:var(--coral-ink)}
.nav{display:flex;gap:4px;margin-left:auto;align-items:center;flex-wrap:wrap}
.nav a{text-decoration:none;font-weight:500;padding:9px 14px;border-radius:14px}
.nav a:hover,.nav a[aria-current=page]{background:var(--sun-soft)}
.nav .login{background:var(--ink);color:#fff}
.nav .login:hover{background:var(--ink);opacity:.88}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:54px;padding:10px 24px;border-radius:18px;border:2px solid var(--ink);background:var(--sun);font-weight:700;font-size:18px;text-decoration:none;color:var(--ink);box-shadow:0 4px 0 var(--ink);cursor:pointer;transition:transform .12s,box-shadow .12s}
.btn:hover{transform:translateY(-2px);box-shadow:0 6px 0 var(--ink)}
.btn:active{transform:translateY(3px);box-shadow:0 1px 0 var(--ink)}
.btn.alt{background:#fff}

/* hero */
.hero{padding:44px 0 26px}
.hero .wrap{display:grid;grid-template-columns:1.4fr .8fr;gap:24px;align-items:center}
.hero h1{font-size:clamp(34px,5.4vw,56px);font-weight:700}
.stage{position:relative;justify-self:center;width:min(100%,330px)}
.stage .floaty{position:absolute;font:700 30px Mali,sans-serif;width:58px;height:58px;display:grid;place-items:center;border-radius:50%;background:#fff;border:3px solid var(--ink);box-shadow:0 4px 0 var(--ink);animation:float 4s ease-in-out infinite}
.floaty.f1{left:-4%;top:6%;color:var(--coral-ink)}.floaty.f2{right:-2%;top:0;color:var(--sky-ink);animation-delay:-1.3s}.floaty.f3{right:-4%;bottom:12%;color:var(--leaf-ink);animation-delay:-2.6s}
@keyframes float{50%{transform:translateY(-12px) rotate(5deg)}}
.capy-live{width:100%;height:auto;display:block;overflow:visible}
.capy-live .body{animation:breathe 3.6s ease-in-out infinite;transform-origin:50% 90%;transform-box:view-box}
@keyframes breathe{50%{transform:scaleY(1.025)}}
.capy-live .ear{animation:ear 5s ease-in-out infinite;transform-box:fill-box;transform-origin:50% 100%}
@keyframes ear{0%,88%,100%{transform:rotate(0)}92%{transform:rotate(-18deg)}96%{transform:rotate(10deg)}}
.capy-live .lid{opacity:0;animation:blink 4.6s infinite}
@keyframes blink{0%,94%,100%{opacity:0}95%,98%{opacity:1}}
.capy-live .orange{animation:hop 3.6s ease-in-out infinite;transform-box:fill-box;transform-origin:50% 100%}
@keyframes hop{0%,70%,100%{transform:translateY(0)}80%{transform:translateY(-9px) rotate(8deg)}90%{transform:translateY(0) scale(1.06,.94)}}

/* reveal on scroll */
.rv{opacity:0;transform:translateY(22px);transition:opacity .55s ease,transform .55s cubic-bezier(.2,1.3,.5,1);transition-delay:var(--d,0s)}
.rv.in{opacity:1;transform:none}

/* stroke demo */
.demo{display:grid;grid-template-columns:minmax(0,340px) 1fr;gap:26px;align-items:center;background:var(--sky-soft);border-radius:32px;padding:24px}
.demo-box{background:#fff;border-radius:24px;padding:10px;box-shadow:var(--shadow)}
.demo-box svg{display:block;width:100%;height:auto}
.demo-chips{display:flex;gap:8px;margin:14px 0}
.demo-chips .chip{font-size:22px;min-width:62px;justify-content:center}
.demo ol{margin:0;padding-left:1.3em}

/* how-to infographic */
.flow{position:relative;display:grid;grid-template-columns:repeat(4,1fr);gap:14px;list-style:none;margin:0;padding:0}
.flow::before{content:"";position:absolute;left:12%;right:12%;top:46px;border-top:5px dotted var(--sun);z-index:0}
.flow li{position:relative;z-index:1;text-align:center;padding:0 6px}
.flow .bub{width:92px;height:92px;margin:0 auto 8px;border-radius:50%;background:#fff;border:4px solid var(--ink);display:grid;place-items:center;box-shadow:0 5px 0 var(--ink)}
.flow .bub svg{width:56px;height:56px}
.flow b{display:block;font:700 19px Mali,sans-serif}
.flow small{font-size:15px;line-height:1.4;display:block;color:var(--muted)}

/* counting infographic */
.grow{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.grow>div{background:#fff;border:3px solid var(--line);border-radius:var(--radius);padding:16px 18px}
.grow h3{font-size:20px}.grow .big{font:700 40px/1.6 Mali,sans-serif;color:var(--leaf-ink)}
.dots{display:grid;grid-template-columns:repeat(10,1fr);gap:4px;margin:8px 0 10px;max-width:250px}
.dots i{aspect-ratio:1;border-radius:50%;background:var(--sun);transform:scale(0);transition:transform .35s cubic-bezier(.3,1.8,.5,1);transition-delay:calc(var(--n)*45ms)}
.rv.in .dots i{transform:none}
.grow p{margin:0;font-size:15.5px;line-height:1.5}
.source{font-size:14px;color:var(--muted);margin:10px 0 0}
.prog{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin-top:14px}
.thumb{aspect-ratio:210/297;width:100%;object-fit:cover;border:1.5px solid #cfc8b6;border-radius:6px;background:#fff;display:block}
.detail .thumb{box-shadow:0 8px 0 rgba(46,42,79,.08)}
.hero h1 mark{background:linear-gradient(transparent 62%,var(--sun) 62%);color:inherit}
.hero p{font-size:19px;max-width:30em;margin:12px 0 0;color:var(--muted)}
.mascot{justify-self:center;width:min(100%,260px);height:auto;animation:bob 3.4s ease-in-out infinite}
@keyframes bob{50%{transform:translateY(-8px)}}

section{padding:22px 0}
.sec-h{font-size:27px;font-weight:700;margin-bottom:14px}
.sec-sub{color:var(--muted);margin:-8px 0 16px}

/* levels */
.levels{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.level{appearance:none;font:inherit;color:inherit;text-align:left;cursor:pointer;border:3px solid var(--line);background:var(--card);border-radius:var(--radius);padding:18px;display:flex;gap:14px;align-items:center;box-shadow:var(--shadow);transition:transform .12s}
.level:hover{transform:translateY(-3px)}
.level[aria-pressed=true]{border-color:var(--ink);background:var(--sun-soft)}
.level .num{flex:none;width:68px;height:68px;border-radius:50%;display:grid;place-items:center;font:700 25px Mali,sans-serif;background:var(--c)}
.level b{display:block;font:700 22px Mali,sans-serif}
.level small{font-size:15px;color:var(--muted)}

/* topics */
.topics{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.topic{display:flex;flex-direction:column;gap:6px;text-decoration:none;background:var(--bg);border-radius:var(--radius);padding:16px;min-height:158px;box-shadow:var(--shadow);transition:transform .12s}
.topic:hover{transform:translateY(-4px) rotate(-1deg)}
.topic:hover .glyph{animation:wiggle .5s ease}
@keyframes wiggle{25%{transform:rotate(-9deg) scale(1.08)}60%{transform:rotate(7deg) scale(1.08)}}
.topic .glyph{width:58px;height:58px;display:grid;place-items:center;background:#fff;border-radius:18px;font:700 28px Mali,sans-serif;color:var(--fg)}
.topic .glyph svg{width:40px;height:40px}
.topic b{font:700 20px Mali,sans-serif;margin-top:4px}
.topic small{font-size:14.5px;line-height:1.4}

/* worksheets */
.sheets{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:18px}
.sheet{display:flex;flex-direction:column;background:var(--card);border:2px solid var(--line);border-radius:var(--radius);padding:14px;text-decoration:none;box-shadow:var(--shadow);transition:transform .12s}
.sheet:hover{transform:translateY(-4px)}
.sheet b{font:700 18px Mali,sans-serif;margin-top:10px;line-height:1.35}
.sheet small{color:var(--muted);font-size:14.5px}
.mini{aspect-ratio:210/297;background:#fff;border:1.5px solid #cfc8b6;border-radius:6px;padding:9% 9% 6%;display:flex;flex-direction:column;gap:6%;overflow:hidden;color:#222}
.mini .l{height:2px;background:#222;flex:none}
.mini .t{font:700 clamp(13px,1.6vw,17px) Mali,sans-serif;line-height:1.2}
.mini .row{flex:1;display:flex;align-items:center;justify-content:space-around;gap:4px;border-bottom:1px dashed #bbb;font:400 clamp(20px,3vw,32px) Mali,sans-serif;color:#555;min-height:0}
.mini .row:last-child{border:0}
.mini svg{height:78%;width:auto;max-width:34%}
.tag{display:inline-block;align-self:flex-start;font:500 13.5px Mali,sans-serif;padding:2px 10px;border-radius:10px;background:var(--bg,var(--sun-soft));color:var(--fg,var(--ink));margin-top:8px}

.chips{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:18px}
.chip{appearance:none;font-size:16px;font-weight:500;min-height:46px;padding:7px 16px;border:2px solid var(--line);border-radius:999px;background:#fff;color:var(--ink);cursor:pointer;text-decoration:none;display:inline-flex;align-items:center}
.chip[aria-pressed=true],.chip[aria-current=true]{background:var(--ink);color:#fff;border-color:var(--ink)}

/* parent panel */
.parent{background:var(--grape-soft);border-radius:32px;padding:26px}
.parent-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.tip{background:#fff;border-radius:20px;padding:16px 18px}
.tip b{font:700 18px Mali,sans-serif;display:block;margin-bottom:4px;color:var(--grape-ink)}
.tip p{margin:0;font-size:16px;line-height:1.55}

/* detail */
.crumb{font-size:15.5px;color:var(--muted);margin:22px 0 8px}
.detail{display:grid;grid-template-columns:minmax(0,370px) 1fr;gap:30px;align-items:start;padding-bottom:30px}
.detail .mini{box-shadow:0 8px 0 rgba(46,42,79,.08)}
.detail .mini .t{font-size:24px}.detail .mini .row{font-size:48px}
.detail h1{font-size:clamp(28px,4vw,40px);font-weight:700}
.actions{display:flex;gap:12px;flex-wrap:wrap;margin:18px 0 22px}
.steps{list-style:none;margin:0;padding:0;display:grid;gap:10px}
.steps li{display:flex;gap:12px;align-items:flex-start;background:#fff;border-radius:18px;padding:12px 16px}
.steps i{flex:none;width:32px;height:32px;border-radius:50%;background:var(--sun);display:grid;place-items:center;font:700 16px Mali,sans-serif}
.note{margin-top:16px;padding:12px 16px;border-left:5px solid var(--leaf);background:var(--leaf-soft);border-radius:0 14px 14px 0;font-size:16px}

/* login */
.login-box{max-width:440px;margin:44px auto;background:#fff;border:2px solid var(--line);border-radius:32px;padding:30px;text-align:center}
.login-box svg{width:110px;height:auto}
.login-box label{display:block;text-align:left;font-weight:600;margin:14px 0 4px}
.login-box input{width:100%;min-height:52px;border:2px solid var(--line);border-radius:14px;padding:8px 14px;font:inherit}
.login-box .btn{width:100%;margin-top:20px}

footer{margin-top:30px;padding:24px 0;border-top:2px solid var(--line);color:var(--muted);font-size:15px}

@media (max-width:860px){
  .hero{padding-top:26px}
  .hero .wrap{grid-template-columns:1fr auto}
  .mascot{width:120px}
  .topics{grid-template-columns:repeat(2,1fr)}
  .topic:last-child{grid-column:1/-1}
  .demo,.grow{grid-template-columns:1fr}
  .demo-box{max-width:320px;width:100%;margin:auto}
  .stage{width:150px}.stage .floaty{width:40px;height:40px;font-size:20px;border-width:2px;box-shadow:0 3px 0 var(--ink)}
  .parent-grid,.detail{grid-template-columns:1fr}
  .detail .mini{max-width:330px;margin:auto;width:100%}
}
@media (max-width:620px){
  .wrap{padding:0 16px}
  body{font-size:16.5px}
  .levels{grid-template-columns:1fr}
  .level{padding:12px 14px}
  .level .num{width:54px;height:54px;font-size:21px}
  .nav{margin-left:0;width:100%;padding-bottom:8px}
  .nav a{padding:7px 10px;font-size:15.5px}
  .nav .login{margin-left:auto}
  .sheets{grid-template-columns:repeat(2,1fr);gap:12px}
  .flow{grid-template-columns:repeat(2,1fr);row-gap:20px}.flow::before{display:none}
  .demo{padding:16px}
  .parent{padding:18px 14px}
  .topic{min-height:0}
  .actions .btn{flex:1 1 100%}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important}
  .rv{opacity:1;transform:none}.dots i{transform:none}
}

/* app pages */
.flash{margin:14px 0;padding:12px 16px;border-radius:14px;background:var(--leaf-soft);color:var(--leaf-ink)}
.flash.err{background:var(--coral-soft);color:var(--coral-ink)}
.filters{display:flex;gap:8px;flex-wrap:wrap;align-items:center;margin:12px 0}
.filters>span{font-weight:600;margin-right:2px}
.chap{background:#fff;border:2px solid var(--line);border-radius:var(--radius);margin:14px 0;padding:6px 18px 14px}
.chap>summary{cursor:pointer;display:flex;align-items:center;gap:10px;flex-wrap:wrap;min-height:54px;font:700 21px Mali,sans-serif}
.chap>summary small{font:400 15px Sarabun,sans-serif;color:var(--muted)}
.chap .printall{margin-left:auto;font-size:15px;min-height:44px;padding:6px 16px}
.lv-h{display:flex;gap:10px;align-items:center;font:700 18px Mali,sans-serif;margin:16px 0 10px}
.lv-h i{font-style:normal;background:var(--sun);border-radius:12px;padding:2px 12px;white-space:nowrap}
.sheet .lock{font-size:13.5px;color:var(--muted);margin-top:4px}
.sheet .free{font-size:13.5px;color:var(--leaf-ink);font-weight:600;margin-top:4px}
.pager{display:flex;justify-content:space-between;gap:10px;margin:18px 0;flex-wrap:wrap}
.pager a{font-weight:600}
.panel{background:#fff;border:2px solid var(--line);border-radius:var(--radius);padding:18px;margin:14px 0;overflow-x:auto}
.panel h2{font-size:21px;margin-bottom:10px}
table.t{border-collapse:collapse;width:100%;font-size:15.5px}
table.t th,table.t td{border-bottom:1px solid var(--line);padding:8px 10px;text-align:left;vertical-align:top}
.form-row{display:flex;gap:10px;flex-wrap:wrap;align-items:flex-end;margin:6px 0}
.form-row label{display:flex;flex-direction:column;font-size:14.5px;font-weight:600;gap:3px}
.form-row input,.form-row select{min-height:44px;border:2px solid var(--line);border-radius:12px;padding:6px 10px;font:inherit;background:#fff}
.btn.sm{min-height:42px;font-size:15px;padding:4px 14px;box-shadow:0 2px 0 var(--ink)}
.btn.dng{background:var(--coral-soft)}
.inline{display:inline}
.topics .count{font-size:13.5px;margin-top:auto;font-weight:600}