:root{--ink:#10253f;--mint:#beebd8;--orange:#ff6b57;--paper:#fffdf7;--ivory:#f7f3e8;--line:#10253f24}*{box-sizing:border-box}body{margin:0;color:var(--ink);background:var(--ivory);font-family:Tahoma,"Noto Sans Thai",sans-serif;font-size:16px;line-height:1.7;background-image:linear-gradient(#10253f06 1px,transparent 1px),linear-gradient(90deg,#10253f06 1px,transparent 1px);background-size:48px 48px}button,input,select{font:inherit}button,a,input,select{-webkit-tap-highlight-color:transparent}button{cursor:pointer}a{color:inherit}button:disabled{opacity:.5;cursor:default}:focus-visible{outline:3px solid #e04c38;outline-offset:4px}.topbar{max-width:1180px;margin:auto;display:flex;justify-content:space-between;align-items:center;padding:26px 28px;border-bottom:1px solid var(--line);gap:16px}.brand{display:flex;gap:12px;text-decoration:none;font-weight:900;letter-spacing:1px;align-items:center}.brand small{display:block;font-size:11px;letter-spacing:0;font-weight:400}.brand-icon{background:var(--ink);color:var(--mint);padding:7px 12px;border-radius:12px;font-size:23px;transform:rotate(-5deg)}.teacher-link{font-size:14px;text-underline-offset:5px}main{max-width:1124px;margin:44px auto 70px;padding:0 24px;min-height:65vh}.hero{display:grid;grid-template-columns:1.1fr 1fr;gap:48px;align-items:start}.eyebrow{display:inline-block;border:1px solid var(--ink);border-radius:24px;padding:5px 14px;font-size:12px;letter-spacing:1px;background:var(--mint);font-weight:bold}h1{font-size:clamp(36px,5vw,62px);line-height:1.2;letter-spacing:-1px;margin:23px 0}h1 em{font-style:normal;color:#c54532}h2{font-size:24px;line-height:1.55;margin:0 0 12px}p{margin:10px 0 18px}.muted{color:#536174;font-size:14px}.facts{display:flex;gap:12px;margin:24px 0}.fact{border:1px solid var(--line);border-radius:14px;padding:12px 18px;background:var(--paper)}.fact strong{font-size:24px;display:block;line-height:1.3}.scene{position:relative;border:2px solid var(--ink);border-radius:22px;background:var(--mint);height:180px;overflow:hidden;margin-top:30px}.scene .cloud{position:absolute;top:16px;left:24px;font-size:14px;font-weight:bold}.scene .water{position:absolute;bottom:0;width:100%;height:47px;background:var(--ink);color:var(--mint);text-align:center;letter-spacing:8px}.houses{position:absolute;bottom:44px;left:15%;right:15%;display:flex;gap:16px;align-items:end}.house{height:60px;flex:1;background:var(--paper);border:2px solid var(--ink);position:relative}.house:before{content:'';position:absolute;top:-23px;left:-7px;right:-7px;height:25px;background:var(--orange);clip-path:polygon(15% 0,85% 0,100% 100%,0 100%)}.house:nth-child(2){height:85px}.house:after{content:'';position:absolute;left:35%;bottom:0;width:30%;height:30px;background:var(--ink)}.card{background:var(--paper);border:1px solid var(--line);border-radius:24px;padding:30px;box-shadow:0 8px 0 #10253f08}.card-title{display:flex;justify-content:space-between;align-items:center;margin-bottom:18px}.step{background:var(--orange);border-radius:50%;width:35px;height:35px;text-align:center;font-weight:bold;line-height:35px}label.field{display:block;font-size:14px;font-weight:bold;margin:15px 0}.field input,.field select{display:block;width:100%;padding:11px 12px;background:white;border:1px solid #89939c;border-radius:9px;margin-top:6px;color:var(--ink);min-height:48px}.row{display:grid;grid-template-columns:1fr 1fr;gap:16px}.primary,.secondary{min-height:48px;padding:11px 22px;border-radius:10px;border:1px solid var(--ink);font-weight:bold}.primary{background:var(--ink);color:white}.primary:hover{background:#28415e}.secondary{background:transparent;color:var(--ink)}.wide{width:100%;margin-top:12px}.notice{background:#beebd850;padding:14px;border-left:3px solid #6fc7a4;font-size:13px;border-radius:4px}.error{color:#a3291e;background:#fff0ed;padding:12px;border-radius:8px}.error:empty{display:none}.quiz{max-width:820px;margin:auto}.quiz-top{display:flex;justify-content:space-between;gap:20px;align-items:center}.progress{height:8px;background:#10253f18;border-radius:10px;margin:20px 0}.progress-fill{height:100%;background:#519e80;border-radius:10px}.q-meta{display:flex;justify-content:space-between;font-size:13px;font-weight:bold;color:#4b6459;margin-bottom:16px}.question{font-size:21px}.choices{display:grid;gap:12px;margin-top:24px}.choice{display:flex;align-items:start;gap:13px;padding:16px;border:1px solid #8d99a6;border-radius:12px;cursor:pointer;background:white}.choice:has(input:checked){background:var(--mint);border:2px solid var(--ink);padding:15px}.choice input{accent-color:var(--ink);width:20px;height:20px;flex-shrink:0;margin:4px 0}.letter{font-weight:900}.actions{display:flex;justify-content:space-between;gap:12px;margin-top:26px}.question-nav{display:flex;flex-wrap:wrap;gap:8px;margin:24px 0}.question-nav button{width:40px;height:40px;border:1px solid var(--line);border-radius:9px;background:white;color:var(--ink)}.question-nav button.done{background:var(--mint)}.question-nav button.current{border:2px solid var(--ink)}.success{max-width:600px;text-align:center;margin:70px auto}.success-icon{margin:0 auto 22px;background:var(--mint);width:80px;height:80px;border-radius:50%;font-size:45px}.filters{display:flex;gap:16px;align-items:end;flex-wrap:wrap}.filters .field{margin:0;min-width:140px}.table-wrap{overflow:auto;margin:24px 0}table{width:100%;border-collapse:collapse;white-space:nowrap;font-size:14px}th,td{padding:12px;text-align:left;border-bottom:1px solid var(--line)}th{background:var(--mint)}.teacher-head{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:25px}.empty{padding:35px;text-align:center}.summary{margin-top:24px;font-weight:bold}footer{text-align:center;padding:20px;font-size:12px;color:#566675;border-top:1px solid var(--line)}@media(max-width:760px){.hero{grid-template-columns:1fr;gap:28px}main{margin-top:25px;padding:0 18px}.topbar{padding:18px}.card{padding:22px}.scene{display:none}h1{font-size:42px}.brand small{font-size:10px}.teacher-link{font-size:12px}.question{font-size:19px}.choice{padding:14px}.choice:has(input:checked){padding:13px}.teacher-head{align-items:start}h2{font-size:22px}}@media(max-width:380px){.row{grid-template-columns:1fr;gap:0}.brand{gap:7px;font-size:14px}.topbar{gap:8px}.card{padding:18px}}