:root{--blue:#3158de;--navy:#182445;--muted:#737e95;--line:#e6eaf2;--bg:#f5f7fb;--orange:#f5a44b}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--navy);font-family:'Noto Sans Thai',sans-serif;font-size:16px}button,input,select{font:inherit}button,a,select{ -webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:default;opacity:.5}button:focus-visible,a:focus-visible,select:focus-visible,input:focus-visible{outline:3px solid #f5a44b;outline-offset:4px}aside{width:246px;position:fixed;inset:0 auto 0 0;background:white;padding:38px 24px;display:flex;flex-direction:column;border-right:1px solid var(--line)}.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--navy);font:700 30px 'Outfit',sans-serif}.logo{background:var(--blue);color:white;border-radius:16px;width:49px;height:49px;text-align:center;line-height:46px;font-size:39px}.brand-small{display:block;letter-spacing:2px;font-size:10px;margin-top:1px}.side-label{font-size:12px;color:var(--muted);margin:51px 12px 15px}nav{display:grid;gap:9px}nav button{border:0;background:none;text-align:left;padding:14px 14px;color:#758096;font-size:21px;border-radius:10px;display:flex;gap:13px;align-items:center}nav button span{font-size:14px;font-weight:500}nav button.active{background:#edf1ff;color:var(--blue)}.side-bottom{margin-top:auto;padding:25px 10px 0}.mini-star{color:var(--orange);font-size:32px;display:block}.side-bottom strong{font-size:15px}.side-bottom p{font-size:13px;color:var(--muted);line-height:1.9}.profile{display:flex;gap:10px;margin-top:35px;padding-top:22px;border-top:1px solid var(--line);align-items:center}.profile small{display:block;color:var(--muted);font-size:12px}.profile b{font-size:14px}.avatar{width:40px;height:40px;background:#ffebca;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;color:#a7651a;font-weight:700}.avatar.small{width:33px;height:33px;margin-left:16px}.shell{margin-left:246px}header{height:84px;padding:0 42px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);background:#fff;font-size:13px}.crumb{color:var(--muted);margin-left:12px}.header-right{display:flex;align-items:center;color:var(--muted);font-size:12px}.status-dot{background:#70a997;border-radius:50%;width:6px;height:6px;margin-right:8px}main{max-width:1340px;margin:auto;padding:36px 42px 45px}h1{font-size:29px;margin:0 0 5px;font-weight:700;letter-spacing:-.6px}h2{font-size:21px;margin:0}h3{font-size:18px;margin:0 0 7px}p{line-height:1.8}.muted{color:var(--muted)}.intro{display:flex;justify-content:space-between;align-items:center;margin-bottom:26px}.intro p{margin:0;font-size:14px}.tag{padding:7px 12px;border:1px solid var(--line);background:white;border-radius:7px;font-size:12px;color:#68758b}.hero{background:var(--blue);border-radius:18px;padding:28px 32px;color:white;display:grid;grid-template-columns:1fr auto;gap:20px;position:relative}.eyebrow{font:500 11px 'Outfit';letter-spacing:2px;opacity:.7;margin-bottom:12px}.hero h2{font-size:25px}.hero p{font-size:14px;max-width:620px;color:#d8e1ff;margin:8px 0 18px}.btn{border:0;border-radius:9px;background:var(--blue);color:white;font-weight:600;padding:12px 20px;font-size:14px;display:inline-flex;gap:12px;align-items:center;justify-content:center;text-decoration:none}.btn.light{background:white;color:var(--blue)}.btn.secondary{color:var(--navy);background:white;border:1px solid var(--line)}.btn.orange{background:#ffcb72;color:#684016}.hero-ring{width:151px;height:151px;border-radius:50%;border:10px solid #ffffff26;display:flex;flex-direction:column;align-items:center;justify-content:center;margin:0 12px;align-self:center;position:relative}.hero-ring:before{content:'';position:absolute;inset:-10px;border:10px solid transparent;border-top-color:#ffcb72;border-right-color:#ffcb72;border-radius:50%;transform:rotate(-30deg)}.hero-ring b{font:600 43px 'Outfit'}.hero-ring span{font-size:12px;color:#dae3ff}.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin:22px 0 32px}.stat{border:1px solid var(--line);background:white;border-radius:13px;padding:18px 20px;display:flex;align-items:center;gap:15px}.stat-icon{width:43px;height:43px;border-radius:12px;background:#eef2ff;color:var(--blue);display:grid;place-items:center;font-size:23px}.stat small{display:block;color:var(--muted);font-size:12px}.stat b{font:600 25px 'Outfit';margin-right:8px}.stat em{font-style:normal;font-size:12px;color:var(--muted)}.section-head{display:flex;justify-content:space-between;align-items:center;margin:24px 0 18px}.section-head p{margin:4px 0 0;color:var(--muted);font-size:13px}.text-btn{border:0;background:none;color:var(--blue);font-size:13px}.subjects{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.subject{background:white;border:1px solid var(--line);border-radius:14px;padding:22px;transition:transform .2s,box-shadow .2s}.subject:hover{transform:translateY(-3px);box-shadow:0 10px 24px #1522480a}.subject-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:18px}.subject-icon{font:600 26px 'Outfit','Noto Sans Thai';background:var(--tint);color:var(--color);width:49px;height:49px;border-radius:14px;display:grid;place-items:center}.subject-no{font:500 11px 'Outfit';letter-spacing:1px;color:#a3abbc}.subject p{font-size:12px;color:var(--muted);margin:0;min-height:43px}.subject-meta{display:flex;justify-content:space-between;color:var(--muted);font-size:12px;margin:17px 0 7px}.bar{height:5px;border-radius:8px;background:#eef1f6;overflow:hidden}.bar 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0}.chip{background:#f0f3fb;color:#596985;padding:8px 12px;border-radius:7px;font-size:13px}.question{max-width:820px;margin:0 auto}.question-header{display:flex;justify-content:space-between;align-items:center;margin:22px 0}.question h2{font-size:28px;line-height:1.8;margin:20px 0}.choices{display:grid;grid-template-columns:1fr 1fr;gap:13px;margin:24px 0}.choice{display:flex;align-items:center;text-align:left;padding:20px;border:2px solid #e6eaf2;border-radius:12px;background:white;font-size:20px;color:var(--navy);gap:17px;min-height:78px}.choice span{font:500 14px 'Outfit';background:#f0f3f9;border-radius:7px;width:29px;height:29px;display:grid;place-items:center;flex-shrink:0}.choice.selected{border-color:var(--blue);background:#f0f4ff}.choice.correct{border-color:#35a67a;background:#edf9f3}.feedback{padding:18px 22px;background:#edf8f3;border-radius:10px;margin-bottom:18px;line-height:1.8}.feedback.wrong{background:#fff5e7}.feedback p{margin:5px 0 0;font-size:15px}.timer{font:500 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0}.check-row{display:flex;justify-content:space-between;gap:20px;align-items:center;padding:14px 0;border-bottom:1px solid var(--line)}.check-row select{width:190px;margin:0}.check-row p{font-size:13px;margin:4px 0;color:var(--muted)}@media(min-width:1500px){main{padding-top:42px}.subjects{gap:22px}.subject{padding:27px}.hero{padding:34px}}@media(max-width:1100px){aside{width:210px;padding:30px 17px}.shell{margin-left:210px}main{padding:28px 26px}header{padding:0 26px}.subjects{grid-template-columns:repeat(2,1fr)}.header-right{font-size:0}.stat{padding:14px;gap:9px}}@media(max-width:720px){aside{position:static;width:100%;padding:17px 20px;border-bottom:1px solid var(--line)}.brand{font-size:24px}.logo{width:40px;height:40px;font-size:32px;line-height:38px}.brand-small{font-size:8px}.side-label,.side-bottom{display:none}nav{display:flex;margin-top:18px;gap:4px;overflow-x:auto}nav button{padding:9px 11px;font-size:0;white-space:nowrap;gap:0}nav button 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table{min-width:580px}}
.reference-banner{display:flex;gap:16px;align-items:center;flex-wrap:wrap;padding:20px 24px;background:#fff;border:1px solid #dbe3fc;border-radius:14px;margin-top:20px}.reference-banner div{flex:1;min-width:220px}.reference-banner p{font-size:14px;color:var(--muted);margin:5px 0}.question-figure{margin:20px 0;padding:18px;border:1px solid var(--line);border-radius:12px;text-align:center;background:white}.question-figure img{max-width:100%;max-height:350px;width:auto;height:auto}.image-choices .choice{justify-content:flex-start}.image-choices img{width:min(150px,75%);height:145px;object-fit:contain}.answer-image{max-width:160px;max-height:160px;margin:10px 0;border:1px solid #d7dfee;border-radius:8px;background:white}.support-row{border-top:1px solid var(--line);padding:10px 0;justify-content:space-between}.pause-overlay{position:fixed;inset:0;z-index:20;background:#172342df;display:grid;place-items:center;padding:20px}.pause-overlay .panel{max-width:520px;text-align:center}.source-list{display:grid;gap:8px;margin-top:20px}.source-list a{display:flex;justify-content:space-between;gap:12px;align-items:center;padding:13px 15px;background:#f5f7fb;border-radius:8px;text-decoration:none;font-size:14px}.source-list a:hover{background:#e9efff}.source-list small{white-space:nowrap;color:var(--muted)}.subject p,.subject-meta,.subject button,.section-head p,.stat small,.text-btn{font-size:14px}.note{font-size:13px}.subject p{min-height:50px}.subject-meta{flex-wrap:wrap;gap:6px}.review .question-figure img{max-height:230px}.review details{margin:10px 0}.header-right .avatar{font-size:16px}@media(max-width:720px){.source-list a{align-items:flex-start;flex-direction:column}.reference-banner{padding:18px}.image-choices{grid-template-columns:1fr 1fr}.image-choices .choice{padding:10px;gap:6px;flex-direction:column}.image-choices img{width:100%;max-width:125px;height:125px}.question-figure{padding:8px}.subject p,.subject-meta{font-size:13px}.subject button{font-size:14px}}