:root{font-family:Georgia,Times New Roman,serif;color:#132b3c;background:#f8f7f4;font-synthesis:none}*{box-sizing:border-box}body{margin:0}button,a,input{font:inherit}button{cursor:pointer}header{max-width:560px;margin:auto;padding:22px 22px 12px;display:flex;align-items:center;justify-content:space-between;gap:12px}.brand{display:flex;align-items:center;gap:8px;font-weight:700;font-size:25px}.brand small,.level small{font-family:system-ui,sans-serif;font-size:9px;letter-spacing:.12em;color:#627077;display:block;margin-top:3px}.mark{font-size:34px;color:#2c8481}.level{border-radius:18px;background:#e9efec;padding:9px 13px;font-weight:700;white-space:nowrap;font-size:14px}.level small{letter-spacing:0;font-size:12px}main{max-width:560px;margin:auto;padding:20px 22px 120px}h1,h2,h3,p{margin-top:0}h1{font-size:42px;line-height:1.08;margin-bottom:12px;letter-spacing:-.03em}h2{font-size:29px;line-height:1.1;letter-spacing:-.025em}h3{font-size:21px;line-height:1.15;margin-bottom:9px}.hello,.eyebrow{font-family:system-ui,sans-serif;color:#397c78;font-weight:700;font-size:10px;letter-spacing:.14em}.hello{margin:7px 0 10px;text-transform:uppercase}.lead,p{color:#526268;line-height:1.5}.lead{font-size:17px;max-width:450px}.chapter{margin:28px 0 30px;min-height:220px;padding:24px;border-radius:20px;background:#e2ebe3 url(/anatomy.png) center/cover;display:flex;align-items:center}.chapter>div{width:64%}.chapter h2{font-size:31px;margin:11px 0}.chapter p{font-size:14px;max-width:180px;margin:0}.section-title,.progress-title{display:flex;justify-content:space-between;align-items:center;gap:8px}.section-title span,.progress-title span,.next small{font:12px system-ui,sans-serif;color:#6b797e}.lesson-card{border:1px solid #d9e0dd;border-radius:19px;padding:18px;display:grid;grid-template-columns:72px 1fr;gap:16px;background:#fff}.lesson-card p{font-size:14px;margin-bottom:16px}.cell{background:#e4efea;color:#3b8a84;border-radius:15px;display:grid;place-items:center;font-size:40px;height:72px}.primary{border:0;background:#174964;color:#fff;padding:13px 16px;border-radius:10px;font-weight:700;width:100%;display:flex;justify-content:space-between;align-items:center}.primary:disabled,.secondary:disabled{opacity:.5;cursor:not-allowed}.progress-title{margin-top:27px;font-size:16px}.bar{height:8px;border-radius:20px;background:#e4e8e6;overflow:hidden;margin-top:12px}.bar>div{height:100%;background:#328782}.next-title{margin-top:27px}.next{border-bottom:1px solid #e2e7e4;padding:13px 0;display:flex;gap:12px;align-items:center}.next span{color:#328782;font:12px system-ui,sans-serif}.next small{margin-left:auto}nav{position:fixed;bottom:0;left:0;right:0;display:flex;justify-content:center;background:#fcfcfaeb;border-top:1px solid #e1e6e3;padding:8px 0 max(10px,env(safe-area-inset-bottom));-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}nav button{border:0;background:transparent;color:#788385;min-width:100px;font:11px system-ui,sans-serif;display:flex;flex-direction:column;align-items:center;gap:3px}nav button span{font-size:24px;line-height:1}nav button.active{color:#1b6571;font-weight:700}.back{display:block;border:0;background:none;color:#347a78;padding:0;margin-bottom:30px}.lesson-heading{margin-top:12px}.reading section{margin:38px 0}.reading section h2{margin-bottom:12px}.reading p{font-size:17px;line-height:1.7}.section-number{font:11px system-ui,sans-serif;color:#328782;letter-spacing:.1em}aside,.empty{background:#e6efea;border-radius:14px;padding:19px;color:#315b59;line-height:1.5}.source{font:13px/1.5 system-ui,sans-serif;margin:30px 0;color:#6a7b7c}.source a{color:#256e6b}fieldset{border:1px solid #dce4df;border-radius:15px;background:#fff;margin:25px 0;padding:17px;min-width:0}legend{font-size:19px;font-weight:700;padding:0 4px;line-height:1.25}legend span{color:#328782;font:12px system-ui,sans-serif}label{display:flex;gap:10px;align-items:flex-start;margin:9px 0;padding:12px;border:1px solid #e3e8e5;border-radius:9px;line-height:1.35}label.selected{border-color:#328782;background:#f0f8f5}input{accent-color:#287f7b;margin-top:4px}.wide{margin:25px 0}.award,.profile{background:#e6efea;border-radius:18px;padding:22px;font-size:28px;font-weight:700}.award small{display:block;font:13px system-ui,sans-serif;color:#53716e;margin-top:8px}.explanation{padding:20px 0;border-bottom:1px solid #e0e6e2}.explanation b{font:700 12px system-ui,sans-serif;color:#31817c}.explanation h3{margin-top:10px}.explanation p{margin-bottom:0}.secondary{border:1px solid #2a7975;background:transparent;color:#246a67;border-radius:9px;padding:10px 14px}.error{background:#f9e5df;color:#8a3930;border-radius:12px;padding:14px;margin-bottom:18px;font:14px/1.4 system-ui,sans-serif}.profile p{font:14px/1.5 system-ui,sans-serif}.empty{margin-top:30px}@media(max-width:360px){header{padding-inline:15px}.brand{font-size:21px}.brand small{font-size:8px}main{padding-inline:16px}.chapter{min-height:190px}.chapter h2{font-size:26px}nav button{min-width:86px}}
