@import "https://fonts.googleapis.com/css2?family=Golos+Text:wght@400;600;700&display=swap";
:root{--ink:#252525;--muted:#7b8391;--blue:#2449e8;--blue-dark:#1739cd;--blue-soft:#f2f5f9;--page:#f2f5f9;--line:#e9edf3;--radius:8px}*{box-sizing:border-box}html{background:var(--page);min-width:320px}body{color:var(--ink);background:var(--page);-webkit-font-smoothing:antialiased;margin:0;font-family:Golos Text,Helvetica Neue,Arial,sans-serif;font-size:16px;line-height:1.45}a{color:inherit;text-decoration:none}button,input{font:inherit}.site-header{background:#fff;border-bottom:1px solid #f2f3f5;height:60px}.header-inner{justify-content:flex-start;align-items:flex-end;width:min(1120px,100% - 48px);height:100%;margin:0 auto;display:flex}.brand{letter-spacing:-1px;margin-bottom:8px;font-family:Golos-Bold,Golos Text,Helvetica Neue,Arial,sans-serif;font-size:24px;font-weight:700;line-height:1;transform:translate(-1px,1px)}.site-header nav{color:#5f6570;align-items:flex-start;gap:40px;height:30px;margin-left:94px;font-size:16px;display:flex}.site-header nav a,.site-header nav span,.site-header nav button{height:30px;color:inherit;cursor:pointer;background:0 0;border:0;align-items:flex-start;padding:0;display:flex;position:relative}.site-header nav .active{color:var(--ink);min-width:80px;font-family:Golos-Bold,Golos Text,Arial,sans-serif;font-weight:700}.site-header nav .active:after{content:"";background:#1d2023;width:40px;height:3px;position:absolute;bottom:0;left:0;right:auto}.header-profile-icon{color:#111;cursor:pointer;background:0 0;border:0;width:32px;height:32px;margin:0 20px 14px auto;padding:3px}.header-profile-icon svg,.back-arrow-icon{width:100%;height:100%;display:block}.course-page{grid-template-columns:minmax(0,691px) 406px;align-items:start;gap:23px;width:min(1120px,100% - 48px);margin:25px auto 72px;display:grid}.lesson-card,.course-sidebar{background:#fff;border-radius:24px}.lesson-card{min-width:0;padding:30px 48px 36px}.lesson-card h1{letter-spacing:-.3px;margin:0 0 13px;font-family:Golos-Bold,Golos Text,Helvetica Neue,Arial,sans-serif;font-size:25px;font-weight:700;line-height:1.24}.lesson-blocks{color:#303033;flex-direction:column;gap:20px;font-size:15px;line-height:21px;display:flex}.lesson-blocks>.rich-text:first-child{border-left:2px solid #6c86f7;min-height:104px;padding-top:10px;padding-bottom:10px;padding-left:15px}.rich-text{overflow-wrap:anywhere}.rich-text>:first-child{margin-top:0}.rich-text>:last-child{margin-bottom:0}.rich-text br+br{content:"";height:10px;display:block}.rich-text p{margin:0 0 12px}.rich-text ul,.rich-text ol{margin:10px 0 0;padding-left:40px}.rich-text li{margin:5px 0;padding-left:2px}.rich-text a{color:var(--blue);text-underline-offset:2px;text-decoration:underline}.rich-text font{font-family:Golos Text,Helvetica Neue,Arial,sans-serif!important}.callout{border-radius:16px;width:500px;max-width:100%;padding:16px;font-size:15px;line-height:21px}.callout-question{color:#fff;background:#6c86f7;font-family:Golos Text,Helvetica Neue,Arial,sans-serif;font-weight:400}.callout-question strong{font-weight:400}.callout-answer{background:var(--blue-soft);align-self:flex-end}.callout-answer .paragraph-break{height:18px;display:block}.callout-question+.callout-answer{margin-top:-10px}.audio-player{align-items:center;gap:16px;display:flex}.audio-play{color:#000;cursor:pointer;background:0 0;border:0;flex:0 0 20px;width:20px;padding:0;font-size:24px;line-height:1}.audio-content{flex:1;min-width:0}.audio-content strong{margin-bottom:7px;font-size:16px;line-height:20px;display:block}.audio-controls{grid-template-columns:auto 1fr auto;align-items:center;gap:8px;width:100%;font-size:13px;display:grid}.audio-controls input{accent-color:#6c86f7;width:100%;height:3px;margin:0}.media-block{flex-direction:column;gap:14px;display:flex}.media-block p{margin:0}.media-block img,.media-block video{border-radius:3px;max-width:100%;height:auto;display:block}.media-block video{background:#111;width:100%}.media-caption{color:#676d77;font-size:14px}.link-block{flex-direction:column;align-items:flex-start;gap:10px;display:flex}.link-block p{margin:0}.link-block a{color:var(--blue);align-items:center;gap:8px;font-weight:700;display:inline-flex}.next-lesson-button{color:#fff;background:#000;border-radius:12px;justify-content:center;align-items:center;width:150px;height:46px;margin-top:44px;font-family:Golos-Bold,Golos Text,Arial,sans-serif;font-size:14px;font-weight:700;display:inline-flex}.course-sidebar{max-height:calc(100vh - 101px);padding:24px 26px 28px;position:sticky;top:20px;overflow:hidden}.course-sidebar h2{border-bottom:1px solid #dfe3e9;margin:0 0 13px;padding-bottom:10px;font-family:Golos-Bold,Golos Text,Helvetica Neue,Arial,sans-serif;font-size:16px;font-weight:700;line-height:1.25}.sidebar-sections{flex-direction:column;gap:8px;max-height:calc(100vh - 193px);display:flex;overflow-y:auto}.sidebar-section{padding-bottom:8px}.sidebar-section:last-child{border-bottom:0}.sidebar-section summary{cursor:pointer;grid-template-columns:auto 1fr;align-items:center;gap:4px;min-height:38px;margin-left:20px;font-family:Golos-Bold,Golos Text,Helvetica Neue,Arial,sans-serif;font-size:20px;font-weight:700;list-style:none;display:grid}.sidebar-section summary::-webkit-details-marker{display:none}.section-number{width:auto;height:auto;color:inherit;font-size:inherit;background:0 0}.section-number:after{content:"."}.summary-chevron{display:none}.sidebar-group{margin:2px 0 13px 20px}.sidebar-group-title{color:var(--ink);justify-content:space-between;gap:10px;margin-bottom:4px;font-family:Golos-Bold,Golos Text,Arial,sans-serif;font-size:16px;font-weight:700;display:flex}.sidebar-group-title span:last-child{display:none}.sidebar-lessons{flex-direction:column;gap:3.5px;margin-left:-20px;display:flex}.sidebar-lessons a{color:#34373d;border-radius:4px;grid-template-columns:10px 210px 1fr;gap:7px;min-height:28px;padding:2px 4px;font-size:14px;line-height:1.35;display:grid}.sidebar-lessons a:hover{color:var(--blue)}.lesson-state{color:#252525;font-size:12px}.sidebar-lessons a.current .lesson-state:before{content:"•"}.sidebar-lessons a:after{color:#e0e3e8;content:"✓";justify-self:end;font-size:12px}.mobile-menu-button,.mobile-menu-overlay{display:none}.site-footer{width:min(1120px,100% - 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