:root{color-scheme:dark;font-family:Arial,Helvetica,sans-serif;background:#060c14;color:#edf3f9}*{box-sizing:border-box}body{margin:0}header,footer{max-width:1160px;margin:auto;padding:28px 24px;display:flex;justify-content:space-between;gap:20px}a{color:inherit}header a{text-decoration:none;font-size:13px;letter-spacing:2px;font-weight:700}main{max-width:1160px;margin:25px auto 60px;padding:0 24px}.product{display:grid;grid-template-columns:1.1fr 1fr;gap:60px;align-items:center}.art{width:100%;height:auto;border-radius:16px}.eyebrow{color:#73e0d4;font-size:12px;letter-spacing:2px;text-transform:uppercase}h1{font-size:clamp(32px,5vw,58px);line-height:1.06;letter-spacing:-2px;margin:18px 0}p,li{line-height:1.6;color:#b7c5d3}.price{font-size:30px;color:white;margin:24px 0}.price small{font-size:14px;color:#a6b5c7}li{margin:10px 0}.cta{display:inline-block;padding:18px 28px;border-radius:6px;background:#81f3bb;color:#062116;text-decoration:none;font-weight:700;margin-top:18px}.note{font-size:13px;margin-top:28px;border-top:1px solid #263241;padding-top:20px}.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}.card{text-decoration:none}.card img{width:100%;height:auto;border-radius:12px}.card h3{font-size:20px;margin-bottom:8px}.chapter-boss{border:1px solid #385367;border-radius:12px;margin:12px 0;padding:16px}.chapter-boss summary{cursor:pointer;font-size:20px;font-weight:bold}.chapter-list{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:10px;margin-top:16px}.chapter-list a{display:flex;flex-direction:column;gap:8px;padding:14px;background:#101e2b;border-radius:8px;text-decoration:none}.chapter-list a span+span{font-size:13px;color:#81f3bb}.categories{display:flex;flex-wrap:wrap;gap:10px;margin:28px 0}.categories a{padding:12px 16px;border:1px solid #385367;border-radius:24px;text-decoration:none;font-size:14px}.categories a:hover,.categories a:focus-visible{background:#163548;color:#81f3bb}.category-section{margin:56px 0;scroll-margin-top:24px}.category-section h2{font-size:28px}.category-section h2 small{font-size:13px;color:#94aaba;font-weight:normal}footer{border-top:1px solid #263241;color:#9eaebe;font-size:12px;flex-wrap:wrap}@media(max-width:760px){main{margin-top:10px}.product{grid-template-columns:1fr;gap:20px}.art{max-width:540px}.grid{grid-template-columns:repeat(2,1fr);gap:16px}header,footer{padding:22px 20px}h1{letter-spacing:-1px}}