/* ============================================
   Roblox เด็กเทพสอบประถม - Worksheet System
   Kawaii Pastel · iPad-first design
   ============================================ */
:root{
  --pink:#FFB3D9;--pink-l:#FFE4F3;--pink-d:#FF69B4;--pink-x:#FF4F86;
  --purple:#C9B8FF;--purple-l:#EDE7FF;--purple-d:#7B68EE;
  --mint:#A8EDD4;--mint-l:#E0FAF2;--mint-d:#5DD3A8;
  --yellow:#FFE4A8;--yellow-l:#FFF8E1;
  --sky:#B5E2FF;--sky-l:#E0F2FE;--sky-d:#5BC0BE;
  --bg:#FDF0FF;--text:#3A2845;--ink:#5A3D6B;--soft:#7E5F8F;
  --shadow:0 4px 24px rgba(180,120,220,.18);
  --shadow-lg:0 14px 48px rgba(180,120,220,.3);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:'Mali','IBM Plex Sans Thai',sans-serif;
  background:var(--bg);color:var(--text);
  font-size:17px;line-height:1.65;min-height:100vh;
  background-image:
    radial-gradient(circle at 5% 8%,rgba(255,179,217,.18) 0,transparent 320px),
    radial-gradient(circle at 95% 90%,rgba(201,184,255,.18) 0,transparent 340px),
    radial-gradient(circle at 50% 0%,rgba(255,228,168,.15) 0,transparent 280px);
  background-attachment:fixed;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--pink-d);text-decoration:none}
a:hover{text-decoration:underline}

.container{max-width:1100px;margin:0 auto;padding:0 20px}

/* ===== Top buy banner ===== */
.buy-banner{
  display:flex;align-items:center;justify-content:center;gap:10px;
  background:linear-gradient(90deg,#FF4F86,#FF7AA2,#FFB347);
  background-size:200% 100%;
  color:#fff;text-decoration:none;padding:14px 18px;
  font-weight:700;font-size:.95rem;text-align:center;
  animation:shimmer 3s linear infinite;
}
.buy-banner:hover{filter:brightness(1.05);text-decoration:none}
@keyframes shimmer{0%{background-position:0 0}100%{background-position:200% 0}}

/* ===== Header ===== */
.site-header{
  background:#fff;box-shadow:0 4px 18px rgba(180,120,220,.12);
  position:sticky;top:0;z-index:100;
  border-bottom:3px solid var(--pink-l);
}
.nav-inner{
  display:flex;align-items:center;justify-content:space-between;
  padding:12px 0;gap:14px;flex-wrap:wrap;
}
.logo{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--text)}
.logo:hover{text-decoration:none}
.logo-img{
  width:48px;height:48px;border-radius:14px;
  box-shadow:0 6px 18px rgba(255,105,180,.4);
  animation:wiggle 5s ease-in-out infinite;
}
@keyframes wiggle{0%,90%,100%{transform:rotate(0)}93%{transform:rotate(-6deg)}96%{transform:rotate(6deg)}}
.brand-text{
  font-size:1.05rem;font-weight:700;
  background:linear-gradient(135deg,#FF4F86,#C774E8,#7B68EE);
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
}
.nav-links{
  list-style:none;display:flex;gap:6px;flex-wrap:wrap;
  margin-left:auto;align-items:center;
}
.nav-links a{
  display:inline-block;padding:8px 14px;
  font-size:.85rem;font-weight:600;color:var(--ink);
  border-radius:50px;text-decoration:none;
  transition:all .2s;
}
.nav-links a:hover,.nav-links a.active{
  background:var(--pink-l);color:var(--pink-d);text-decoration:none;
}
.nav-buy{
  background:linear-gradient(135deg,#FF4F86,#C774E8);
  color:#fff;padding:10px 18px;border-radius:50px;
  font-size:.85rem;font-weight:700;text-decoration:none;
  white-space:nowrap;
  box-shadow:0 4px 14px rgba(255,79,134,.4);
}
.nav-buy:hover{transform:translateY(-2px);text-decoration:none}
.nav-toggle{
  display:none;background:none;border:none;font-size:1.6rem;
  color:var(--pink-d);cursor:pointer;
}

/* ===== Menu strip (every page) ===== */
.menu-strip{
  background:linear-gradient(135deg,#FFE4F3,#EDE7FF);
  padding:14px 20px;text-align:center;
  border-bottom:2px dashed var(--pink);
}
.menu-strip-inner{
  max-width:1100px;margin:auto;
  display:flex;align-items:center;justify-content:center;gap:10px;flex-wrap:wrap;
  font-size:.92rem;
}
.menu-strip strong{color:var(--pink-d)}
.menu-strip a{
  color:var(--purple-d);font-weight:700;text-decoration:none;
  padding:7px 16px;border-radius:50px;background:#fff;
  box-shadow:0 3px 10px rgba(180,120,220,.15);
  transition:all .2s;
}
.menu-strip a:hover{
  background:var(--pink-d);color:#fff;text-decoration:none;
  transform:translateY(-2px);
}

/* ===== Breadcrumb ===== */
.breadcrumb{
  font-size:.88rem;color:var(--soft);padding:14px 0;
}
.breadcrumb a{color:var(--purple-d);font-weight:600}

/* ===== Page hero ===== */
.page-hero{
  text-align:center;padding:32px 20px;
  background:linear-gradient(135deg,var(--pink-l),var(--purple-l),var(--mint-l));
  border-radius:32px;margin-bottom:30px;
  box-shadow:var(--shadow);
}
.page-hero h1{
  font-size:clamp(1.6rem,4.5vw,2.4rem);
  font-weight:700;line-height:1.25;margin-bottom:12px;
  background:linear-gradient(135deg,#FF4F86,#7B68EE);
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
}
.page-hero .lead{
  color:var(--ink);font-size:1.05rem;line-height:1.7;
  max-width:780px;margin:0 auto;
}
.page-hero .lead strong{color:var(--pink-d)}

/* ===== Z-image gallery ===== */
.z-gallery{
  display:grid;grid-template-columns:repeat(3,1fr);
  gap:14px;margin:24px auto;max-width:780px;
}
.z-card{
  display:block;border-radius:20px;overflow:hidden;
  background:#fff;border:3px solid var(--pink-l);
  box-shadow:var(--shadow);aspect-ratio:1/1;
  transition:all .3s;position:relative;
}
.z-card:hover{
  transform:translateY(-5px) scale(1.02);
  border-color:var(--pink-d);
  box-shadow:0 14px 32px rgba(255,105,180,.3);
  text-decoration:none;
}
.z-card img{width:100%;height:100%;object-fit:cover}
.z-card::after{
  content:"📚 ฝึกข้อสอบ";
  position:absolute;inset:auto 0 0 0;
  background:linear-gradient(0deg,rgba(45,27,78,.85) 0%,transparent 100%);
  color:#fff;font-weight:700;font-size:.9rem;
  padding:30px 8px 12px;text-align:center;
  opacity:0;transition:opacity .3s;
}
.z-card:hover::after{opacity:1}

/* ===== Worksheet wrap ===== */
.worksheet-wrap{
  background:#fff;border-radius:24px;padding:26px 24px;
  box-shadow:var(--shadow);margin:20px 0;
  border:3px solid var(--pink-l);
}
.worksheet-wrap h2{
  font-size:1.3rem;font-weight:700;margin-bottom:14px;color:var(--ink);
}
.worksheet-wrap h2 .grad{
  background:linear-gradient(135deg,#FF4F86,#7B68EE);
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
}

/* ===== Topic buttons ===== */
.topic-btns{
  display:flex;flex-wrap:wrap;gap:10px;margin-top:14px;
}
.tool-btn{
  padding:11px 20px;border-radius:50px;border:2px solid var(--purple-l);
  background:#fff;color:var(--ink);font-family:inherit;font-weight:600;
  font-size:.92rem;cursor:pointer;transition:all .2s;
}
.tool-btn:hover{
  border-color:var(--pink-d);color:var(--pink-d);
  transform:translateY(-2px);
}
.tool-btn.active{
  background:linear-gradient(135deg,#FF4F86,#7B68EE);
  border-color:transparent;color:#fff;
  box-shadow:0 6px 18px rgba(255,79,134,.35);
}

/* ===== Write target (large characters to trace) ===== */
.write-target{
  display:flex;flex-wrap:wrap;gap:14px;justify-content:center;
  background:linear-gradient(135deg,#FFF8E1,#FFE4F3);
  padding:30px 20px;border-radius:20px;
  border:2.5px dashed var(--pink);
  margin-top:16px;
}
.write-target span{
  font-size:clamp(2.5rem,6vw,4rem);
  font-family:'Mali','Itim',sans-serif;
  font-weight:700;color:var(--pink-d);
  background:#fff;border-radius:14px;
  padding:14px 22px;min-width:84px;text-align:center;
  box-shadow:0 4px 12px rgba(255,105,180,.18);
  border:2px solid var(--pink-l);
}

/* ===== Canvas drawing area ===== */
.canvas-container{
  background:#fff;border:3px solid var(--purple-l);
  border-radius:20px;overflow:hidden;
  margin-top:16px;height:400px;position:relative;
  background-image:linear-gradient(0deg,transparent 24%,rgba(255,179,217,.15) 25%,rgba(255,179,217,.15) 26%,transparent 27%,transparent 74%,rgba(255,179,217,.15) 75%,rgba(255,179,217,.15) 76%,transparent 77%,transparent),linear-gradient(90deg,transparent 24%,rgba(201,184,255,.12) 25%,rgba(201,184,255,.12) 26%,transparent 27%,transparent 74%,rgba(201,184,255,.12) 75%,rgba(201,184,255,.12) 76%,transparent 77%,transparent);
  background-size:60px 60px;
}
.canvas-container canvas{
  display:block;width:100%;height:100%;cursor:crosshair;
  touch-action:none;
}
.canvas-tip{
  font-size:.85rem;color:var(--soft);
  background:var(--yellow-l);
  padding:10px 14px;border-radius:12px;
  margin-top:12px;border-left:4px solid var(--yellow);
}
.worksheet-toolbar{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  background:#FAFAFA;padding:12px;border-radius:14px;
  margin-bottom:0;
}
.color-swatch{
  width:34px;height:34px;border-radius:50%;cursor:pointer;
  border:3px solid #fff;box-shadow:0 2px 8px rgba(0,0,0,.15);
  transition:all .2s;
}
.color-swatch:hover{transform:scale(1.1)}
.color-swatch.active{transform:scale(1.18);box-shadow:0 0 0 3px var(--pink-d),0 4px 14px rgba(255,79,134,.3)}

/* ===== Lesson cards (grid) ===== */
.lesson-grid{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));
  gap:18px;margin:24px 0;
}
.lesson-card{
  background:#fff;border-radius:22px;padding:22px 20px;
  box-shadow:var(--shadow);border:3px solid transparent;
  transition:all .3s;text-decoration:none;color:var(--text);
  display:block;position:relative;overflow:hidden;
}
.lesson-card:hover{
  transform:translateY(-6px);
  border-color:var(--pink-d);
  box-shadow:var(--shadow-lg);text-decoration:none;
}
.lesson-card::before{
  content:"";position:absolute;top:0;left:0;right:0;height:6px;
  background:linear-gradient(90deg,var(--accent,var(--pink-d)),var(--purple-d));
}
.lesson-icon{
  width:60px;height:60px;border-radius:18px;
  background:linear-gradient(135deg,var(--pink-l),var(--purple-l));
  display:flex;align-items:center;justify-content:center;
  font-size:1.8rem;margin-bottom:14px;
  box-shadow:0 4px 12px rgba(255,105,180,.18);
}
.lesson-card h3{font-size:1.1rem;font-weight:700;margin-bottom:8px;color:var(--ink)}
.lesson-card p{font-size:.88rem;color:var(--soft);margin-bottom:12px;line-height:1.6}
.lesson-card .badges{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:12px}
.lesson-card .badge{
  font-size:.7rem;font-weight:700;padding:3px 10px;border-radius:50px;
}
.badge-pink{background:var(--pink-l);color:var(--pink-d)}
.badge-purple{background:var(--purple-l);color:var(--purple-d)}
.badge-mint{background:var(--mint-l);color:var(--mint-d)}
.badge-yellow{background:var(--yellow-l);color:#B8860B}
.lesson-card .start-btn{
  display:inline-flex;align-items:center;gap:6px;
  font-size:.88rem;font-weight:700;color:var(--pink-d);
}

/* ===== Quiz / multi-choice (for math, sci, etc) ===== */
.quiz-question{
  background:linear-gradient(135deg,var(--mint-l),var(--yellow-l));
  border-radius:20px;padding:24px;
  margin:14px 0;
  border:2.5px solid var(--mint);
}
.quiz-question .qtext{
  font-size:1.15rem;font-weight:700;margin-bottom:14px;color:var(--text);
}
.quiz-options{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
.quiz-opt{
  background:#fff;border:2.5px solid var(--purple-l);
  border-radius:14px;padding:14px;
  font-size:1rem;font-weight:600;cursor:pointer;
  text-align:left;font-family:inherit;color:var(--text);
  transition:all .2s;
}
.quiz-opt:hover{border-color:var(--pink-d);transform:translateY(-2px)}
.quiz-opt.correct{background:#D4F4E2;border-color:#2A9870;color:#006B47}
.quiz-opt.wrong{background:#FFE0EC;border-color:var(--pink-d);color:#C2185B}

/* ===== Tips box ===== */
.tips-box{
  background:linear-gradient(135deg,#FFF8E1,#FFE4F3);
  border-radius:20px;padding:24px 26px;
  margin:24px 0;border:2px solid var(--yellow);
}
.tips-box h4{
  font-size:1.15rem;font-weight:700;margin-bottom:12px;
  color:#B8860B;
}
.tips-box ul{margin-left:20px;line-height:2}
.tips-box ul li{font-size:.95rem}
.tips-box strong{color:var(--pink-d)}

/* ===== Inline buy CTA ===== */
.inline-buy-cta{
  background:linear-gradient(135deg,#FFE4F3,#EDE7FF,#E0FAF2);
  border-radius:24px;padding:30px 24px;text-align:center;
  margin:30px 0;border:3px dashed var(--pink-d);
}
.inline-buy-cta h3{font-size:1.3rem;font-weight:700;margin-bottom:8px;color:var(--ink)}
.inline-buy-cta p{color:var(--soft);font-size:1rem;margin-bottom:18px}
.btn-buy-big{
  display:inline-flex;align-items:center;gap:10px;
  background:linear-gradient(135deg,#FF4F86,#FFB347);
  color:#fff;padding:18px 36px;border-radius:50px;
  font-size:1.05rem;font-weight:800;text-decoration:none;
  box-shadow:0 10px 28px rgba(255,79,134,.4);
  border:3px solid #fff;transition:all .3s;
  animation:pulse 2.4s ease-in-out infinite;
}
@keyframes pulse{
  0%,100%{transform:scale(1);box-shadow:0 10px 28px rgba(255,79,134,.4)}
  50%{transform:scale(1.04);box-shadow:0 16px 38px rgba(255,79,134,.6)}
}
.btn-buy-big:hover{transform:translateY(-3px) scale(1.06);text-decoration:none}

/* ===== Related links ===== */
.related-links{
  background:#fff;border-radius:20px;padding:24px;
  margin:24px 0;box-shadow:var(--shadow);
}
.related-links h3{font-size:1.15rem;font-weight:700;margin-bottom:14px}
.related-grid{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));
  gap:10px;
}
.related-grid a{
  background:linear-gradient(135deg,var(--pink-l),var(--purple-l));
  padding:12px 16px;border-radius:14px;font-weight:600;font-size:.9rem;
  color:var(--ink);text-decoration:none;text-align:center;
  transition:all .2s;
}
.related-grid a:hover{
  background:linear-gradient(135deg,#FF4F86,#7B68EE);color:#fff;
  transform:translateY(-2px);text-decoration:none;
}

/* ===== Reviews ===== */
.reviews-section{
  background:linear-gradient(180deg,#fff,#FFF8FB);
  padding:50px 20px;margin-top:40px;
}
.reviews-title{
  font-size:clamp(1.4rem,3.5vw,2rem);
  font-weight:700;text-align:center;margin-bottom:8px;
  background:linear-gradient(135deg,#D81F5C,#FFB347);
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
}
.reviews-subtitle{text-align:center;color:var(--soft);margin-bottom:28px;font-size:1rem}
.reviews-grid{
  display:grid;grid-template-columns:repeat(3,1fr);
  gap:14px;max-width:900px;margin:0 auto;
}
.review-card{
  display:block;border-radius:20px;overflow:hidden;
  background:#fff;border:3px solid var(--pink-l);
  box-shadow:var(--shadow);aspect-ratio:1/1;
  transition:all .3s;position:relative;
}
.review-card:hover{
  transform:translateY(-5px) scale(1.02);
  border-color:var(--pink-d);box-shadow:0 14px 32px rgba(255,105,180,.3);
  text-decoration:none;
}
.review-card img{width:100%;height:100%;object-fit:cover}
.review-overlay{
  position:absolute;inset:0;
  background:rgba(255,79,134,.85);
  display:flex;align-items:center;justify-content:center;
  color:#fff;font-weight:700;font-size:1.1rem;
  opacity:0;transition:opacity .3s;
}
.review-card:hover .review-overlay{opacity:1}
.reviews-cta{text-align:center;margin-top:30px}
.reviews-note{margin-top:12px;font-size:.85rem;color:var(--soft)}

/* ===== Footer ===== */
.site-footer{
  background:linear-gradient(135deg,#3A2845,#5A3D6B);
  color:#fff;padding:36px 20px 24px;
}
.footer-grid{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));
  gap:30px;margin-bottom:24px;
}
.footer-grid h5{font-family:'Mali',sans-serif;font-size:1.05rem;margin-bottom:12px;color:#FFB3D9}
.footer-grid a{
  display:block;color:rgba(255,255,255,.85);text-decoration:none;
  padding:5px 0;font-size:.9rem;
}
.footer-grid a:hover{color:#FFB3D9}
.footer-brand{display:flex;align-items:center;gap:10px}
.footer-brand img{border-radius:10px}
.footer-buy{
  background:linear-gradient(135deg,#FF4F86,#FFB347);
  color:#fff !important;padding:14px 18px;border-radius:14px;
  text-align:center;font-weight:700;line-height:1.5;
  display:block;text-decoration:none;
}
.footer-bottom{
  text-align:center;font-size:.82rem;color:rgba(255,255,255,.5);
  padding-top:18px;border-top:1px solid rgba(255,255,255,.15);
}

/* ===== Floating buy ===== */
.floating-buy{
  position:fixed;bottom:18px;right:18px;z-index:60;
  display:flex;align-items:center;gap:8px;
  background:linear-gradient(135deg,#FF4F86,#FFB347);
  color:#fff;padding:14px 22px;border-radius:50px;
  font-weight:700;font-size:.95rem;text-decoration:none;
  box-shadow:0 8px 24px rgba(255,79,134,.5);
  border:3px solid #fff;
}
.floating-buy:hover{transform:scale(1.05);text-decoration:none}
.fb-emoji{font-size:1.2rem}

/* ===== Grade/Subject hub cards ===== */
.grade-hub-grid{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));
  gap:22px;margin:30px 0;
}
.grade-hub-card{
  background:#fff;border-radius:26px;padding:28px 24px;
  box-shadow:var(--shadow);border:3px solid transparent;
  transition:all .3s;text-decoration:none;color:var(--text);
  display:flex;flex-direction:column;align-items:center;text-align:center;gap:8px;
  position:relative;overflow:hidden;
}
.grade-hub-card::before{
  content:"";position:absolute;top:0;left:0;right:0;height:8px;
  background:linear-gradient(90deg,var(--accent,var(--pink-d)),var(--purple-d));
}
.grade-hub-card:hover{
  transform:translateY(-8px);
  border-color:var(--accent,var(--pink-d));
  box-shadow:var(--shadow-lg);text-decoration:none;
}
.grade-hub-emoji{
  font-size:3.5rem;margin:8px 0;
  filter:drop-shadow(0 6px 12px rgba(0,0,0,.15));
}
.grade-hub-card h3{
  font-size:1.4rem;font-weight:700;
  background:linear-gradient(135deg,var(--accent,#FF4F86),#7B68EE);
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
}
.grade-hub-card p{color:var(--soft);font-size:.92rem;line-height:1.6}
.grade-hub-card .start-btn{
  margin-top:auto;display:inline-flex;align-items:center;gap:6px;
  background:linear-gradient(135deg,var(--accent,#FF4F86),#7B68EE);
  color:#fff;padding:10px 22px;border-radius:50px;
  font-size:.9rem;font-weight:700;
}

/* ===== Mobile / iPad ===== */
@media(max-width:900px){
  .nav-toggle{display:block;order:1}
  .nav-links{
    display:none;width:100%;flex-direction:column;align-items:stretch;
    margin-top:10px;
  }
  .nav-links.open{display:flex}
  .nav-links li{width:100%}
  .nav-links a{display:block;text-align:left}
}
@media(max-width:720px){
  body{font-size:16px}
  .container{padding:0 14px}
  .page-hero{padding:24px 18px;border-radius:24px}
  .write-target{padding:20px 14px;gap:10px}
  .write-target span{font-size:2.2rem;padding:12px 16px;min-width:64px}
  .canvas-container{height:340px}
  .quiz-options{grid-template-columns:1fr}
  .reviews-grid,.z-gallery{grid-template-columns:repeat(2,1fr)}
  .floating-buy{padding:12px 16px;font-size:.85rem}
  .floating-buy .fb-text{display:none}
  .menu-strip-inner{font-size:.85rem;gap:8px}
  .menu-strip a{padding:6px 12px;font-size:.78rem}
  .worksheet-toolbar{padding:10px;gap:6px}
  .tool-btn{padding:9px 14px;font-size:.85rem}
}
@media(max-width:420px){
  .reviews-grid,.z-gallery{grid-template-columns:1fr 1fr}
  .write-target span{font-size:1.8rem;padding:10px 12px;min-width:54px}
}

/* iPad-specific - bigger touch targets */
@media(pointer:coarse){
  .tool-btn{min-height:48px;padding:12px 18px;font-size:.95rem}
  .quiz-opt{min-height:56px;font-size:1.05rem}
  .nav-links a{min-height:44px;display:flex;align-items:center}
}