.course-body{background:radial-gradient(ellipse at 85% 0,#10294c66,transparent 40%),#080d16}.course-header{height:82px;padding:0 5%;border-bottom:1px solid #26374d;display:flex;align-items:center;justify-content:space-between;gap:20px;background:#0b1320aa}.course-header .brand{font-size:20px;letter-spacing:2px}.course-header .brand>span{font:8px var(--mono);letter-spacing:1.8px;color:#80a7d6}.course-header-links{display:flex;gap:27px;align-items:center;font-size:11px;color:#8da9cd}.course-header-links a:last-child{border:1px solid #375475;border-radius:7px;padding:8px 13px}.course-container{width:calc(100% - 100px);max-width:1320px;margin:0 auto}.course-intro{display:flex;justify-content:space-between;align-items:center;gap:30px;padding:48px 0 31px}.course-intro h1{font-size:56px;letter-spacing:-2px;line-height:1.15;font-weight:550;margin:20px 0 17px}.course-intro h1>span{color:#90c8ff}.course-intro p{font-size:13px;color:#89a1c2;margin:0;line-height:1.9}.course-rule{display:flex;align-items:center;gap:16px;padding-right:22px}.course-rule>strong{font:64px/1 var(--mono);letter-spacing:-5px;color:#a6d2ff}.course-rule>strong>span{font-size:23px;letter-spacing:-1px}.course-rule>span{font:9px/1.8 var(--mono);color:#6c95c4;letter-spacing:.6px}.course-source-note{border:1px solid #293f5d;border-radius:8px;background:#101c2d;font-size:10px;color:#87a4c9;padding:12px 16px;line-height:1.8;margin-bottom:27px}.course-layout{display:grid;grid-template-columns:270px minmax(0,1fr);gap:28px;align-items:start}.course-sidebar{background:#0f1928;border:1px solid #2b405c;border-radius:13px;padding:23px 18px;position:sticky;top:24px}.course-progress-head{display:flex;align-items:center;justify-content:space-between;gap:10px;font:8px var(--mono);letter-spacing:1px;color:#799cc9}.course-progress-head>strong{font-weight:400;color:#aacff7;letter-spacing:0}.course-progress-track{height:4px;border-radius:3px;background:#263c59;overflow:hidden;margin-top:15px}.course-progress-track>span{display:block;height:100%;background:#90caff;width:0;transition:width .3s}.course-storage-note{font-size:9px;color:#5f7c9f;line-height:1.8;margin:12px 0 21px}.course-group-label{font:8px var(--mono);color:#52749e;letter-spacing:1px;padding:13px 10px 9px}.course-lesson-button{display:flex;align-items:flex-start;gap:11px;width:100%;padding:12px 11px;text-align:left;border:1px solid transparent;border-radius:8px;background:none;color:#a5bddb;margin:3px 0;font-size:11px}.course-lesson-button>span:first-child{font:10px/1.8 var(--mono);color:#597da7;flex-shrink:0}.course-lesson-button>span:nth-child(2){flex:1;line-height:1.7}.course-lesson-button small{display:block;font-size:8px;color:#607d9f;margin-top:3px}.course-lesson-button .lesson-status{font-size:8px;color:#709fd2;line-height:2;white-space:nowrap}.course-lesson-button:hover{background:#17283f;border-color:#314e70}.course-lesson-button:disabled{cursor:not-allowed;opacity:.48;background:none;border-color:transparent}.course-lesson-button[aria-current=page]{background:#1a3354;border-color:#4d77a4;color:#daedff}.course-lesson-button.passed .lesson-status{color:#8ad5c9}.course-main{min-width:0;outline:none}.course-loading{padding:50px 10px;text-align:center;color:#6f91b9;font-size:12px}.course-lesson-header{padding:26px 28px;background:linear-gradient(130deg,#162840,#101b2c);border:1px solid #335071;border-radius:14px;margin-bottom:20px}.course-lesson-header h2{font-size:33px;line-height:1.3;letter-spacing:-1px;margin:14px 0;font-weight:550}.course-lesson-header>p{font-size:12px;line-height:1.9;color:#94b0d2;margin:0}.course-lesson-meta{display:flex;gap:11px;flex-wrap:wrap;margin-top:19px}.course-lesson-meta span{font:9px var(--mono);color:#85b1e1;background:#152b47;border:1px solid #2c4b70;border-radius:5px;padding:6px 9px}.course-theory{padding:26px 28px;border:1px solid #283e59;border-radius:13px;background:#0e1827}.course-theory h3,.course-formulas-heading{font-size:19px;font-weight:500;letter-spacing:-.5px;margin:0 0 17px}.course-theory p{font-size:13px;line-height:2;color:#a1b8d5;margin:13px 0}.course-theory .principle{margin-bottom:0;font-size:12px}.course-formulas-heading{margin:28px 0 16px}.course-formula-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:13px}.course-formula{background:#101d2e;border:1px solid #2b4463;border-radius:11px;padding:20px}.course-formula .formula-count-badge{font:8px var(--mono);color:#7daddf;margin-bottom:15px;display:block}.course-formula h4{font-size:12px;color:#bed5f0;line-height:1.7;margin:0;font-weight:500}.course-formula .course-expression{font:23px/1.6 var(--mono);letter-spacing:-1px;color:#d1e8ff;margin:15px 0;overflow-wrap:anywhere}.course-formula p{font-size:10px;line-height:1.85;color:#829fC4;margin:10px 0 0}.course-formula .formula-units{border-top:1px solid #2a405b;padding-top:12px;color:#a5c0e0}.course-worked{padding:26px 28px;border:1px solid #2c4767;border-radius:13px;background:#111f32;margin-top:20px}.course-worked h3{font-size:19px;line-height:1.6;letter-spacing:-.5px;font-weight:500;margin:12px 0}.course-worked p,.course-worked li{font-size:12px;line-height:1.95;color:#a5bedc}.course-worked ol{padding-left:20px}.course-worked li{padding-left:7px;margin-bottom:9px}.course-reading-action{margin-top:22px;border:1px solid #3b5e86;background:linear-gradient(120deg,#193351,#14263e);padding:25px 27px;border-radius:12px}.course-reading-action h3{font-size:17px;font-weight:500;margin:0 0 8px}.course-reading-action p{font-size:11px;color:#8daed3;line-height:1.9;margin:0 0 19px}.course-reading-action .button{font-size:11px;gap:15px}.course-passed-note{border:1px solid #3a6b6b;background:#102c31;color:#a6d6d4;border-radius:9px;padding:15px 19px;margin-bottom:20px;font-size:12px;line-height:1.8}.course-failed-note{border:1px solid #755064;background:#2d202f;color:#d4adc4;border-radius:9px;padding:15px 19px;margin-bottom:20px;font-size:12px;line-height:1.8}.course-error{border:1px solid #815570;background:#352336;color:#edbfd8;font-size:12px;line-height:1.9;border-radius:9px;padding:16px 19px;margin-bottom:23px}.course-error button{margin-left:14px;background:none;border:0;text-decoration:underline;font-size:11px;color:inherit}.course-exam{background:#101b2b;border:1px solid #344f71;padding:27px;border-radius:13px}.exam-top{display:flex;align-items:center;justify-content:space-between;gap:15px;margin-bottom:24px}.exam-top .text-button{font-size:10px;margin-left:0}.exam-top .eyebrow{font-size:8px}.exam-save{font-size:9px;color:#6e99c9;line-height:1.8}.exam-question-progress{display:flex;align-items:center;justify-content:space-between;font:9px var(--mono);color:#79a3d4;margin:23px 0 14px;gap:15px}.exam-question-track{height:3px;background:#263d5b;overflow:hidden;border-radius:4px;margin-bottom:22px}.exam-question-track>span{display:block;background:#84c4ff;height:100%}.course-exam h2{font-size:25px;line-height:1.6;letter-spacing:-.7px;font-weight:500;margin:0 0 24px;outline:none}.course-exam .quiz-option{padding:14px 17px;min-height:55px}.exam-controls{display:flex;justify-content:space-between;gap:12px;margin-top:23px}.exam-controls .button{font-size:11px;gap:12px}.exam-map{display:flex;gap:7px;flex-wrap:wrap;padding:23px 0;margin-top:23px;border-top:1px solid #2a405b}.exam-map button{width:34px;height:32px;border:1px solid #34516f;border-radius:5px;background:#0c1522;color:#688bb6;font:10px var(--mono)}.exam-map button.answered{background:#1b3858;border-color:#557eaa;color:#b9dfff}.exam-map button[aria-current=step]{outline:2px solid #9cd0ff;outline-offset:2px}.exam-map button:hover{border-color:#98c8fa}.exam-finish{display:flex;justify-content:space-between;align-items:center;gap:20px;border-top:1px solid #2a405b;padding-top:22px}.exam-finish p{font-size:10px;color:#6e92bc;line-height:1.8;margin:0;max-width:250px}.exam-finish .button{font-size:11px;gap:13px;white-space:nowrap}.course-result{background:radial-gradient(ellipse at 50% 0,#1b416b88,transparent 70%),#101d30;border:1px solid #35577f;border-radius:14px;padding:32px;text-align:center}.course-result .eyebrow{justify-content:center;font-size:9px}.course-result h2{font-size:30px;letter-spacing:-.9px;font-weight:500;line-height:1.4;margin:18px 0 13px}.course-result-number{font:78px/1.2 var(--mono);color:#b3dcff;letter-spacing:-5px;margin:22px 0 10px}.course-result-number span{font-size:32px;letter-spacing:-1px;color:#7aa7da}.course-result p{font-size:12px;line-height:1.9;color:#8cafd6;max-width:500px;margin:0 auto}.course-result .result-actions{display:flex;justify-content:center;gap:12px;flex-wrap:wrap;margin-top:25px}.course-result .button{font-size:11px;gap:13px}.course-review{margin-top:24px}.course-review>h3{font-size:20px;font-weight:500;letter-spacing:-.4px;margin:0 0 17px}.course-review details{border:1px solid #2a425f;border-radius:9px;background:#0f1b2b;margin:9px 0;overflow:hidden}.course-review summary{cursor:pointer;padding:16px 19px;display:flex;align-items:flex-start;gap:12px;list-style:none;font-size:12px;line-height:1.8;color:#b5ceea}.course-review summary::-webkit-details-marker{display:none}.course-review summary .review-status{flex-shrink:0;color:#8acbbe;font:8px/2.5 var(--mono);white-space:nowrap}.course-review summary .review-status.wrong{color:#d3a4bd}.course-review details>div{border-top:1px solid #2a405b;padding:15px 19px;font-size:12px;line-height:1.95;color:#91b0d4}.course-review details>div p{margin:6px 0}.course-footer{display:flex;justify-content:space-between;gap:20px;padding:27px 5%;border-top:1px solid #263a53;margin-top:65px;color:#607fa5;font-size:10px}.course-footer a{color:#8aafd9}.course-entry-banner{border-top:1px solid #2c425f;border-bottom:1px solid #2c425f;background:linear-gradient(100deg,#14263e,#0c1727);padding:33px 0}.course-entry-inner{display:flex;align-items:center;justify-content:space-between;gap:30px}.course-entry-inner h2{font-size:27px;font-weight:500;letter-spacing:-.8px;margin:8px 0}.course-entry-inner p{font-size:12px;color:#86a3c7;margin:0;line-height:1.9}.course-entry-inner .button{white-space:nowrap}.course-entry-inner .eyebrow{font-size:8px}.course-metric{display:flex;gap:22px;align-items:center}.course-metric>strong{font:37px var(--mono);color:#a0cfff;letter-spacing:-2px}.course-metric>strong>span{font-size:17px}.course-metric>span{font-size:10px;color:#7b9ac0;line-height:1.9}
@media(max-width:1000px){.course-container{width:calc(100% - 60px)}.course-layout{grid-template-columns:230px minmax(0,1fr);gap:20px}.course-sidebar{padding:21px 13px}.course-intro h1{font-size:49px}.course-lesson-header,.course-theory,.course-worked{padding:23px}.course-lesson-header h2{font-size:29px}.course-formula{padding:18px}.course-formula .course-expression{font-size:20px}.course-exam{padding:24px}.course-exam h2{font-size:23px}.course-rule{padding:0}.course-metric{display:none}}
@media(max-width:750px){.course-header{height:72px;padding:0 22px}.course-header .brand{font-size:17px;gap:8px;letter-spacing:1.5px}.course-header .brand>span{font-size:7px;letter-spacing:1px}.course-header-links{gap:13px;font-size:9px}.course-header-links a:last-child{font-size:8px;padding:7px 9px}.course-container{width:calc(100% - 40px)}.course-intro{padding:34px 0 24px;gap:20px}.course-intro h1{font-size:42px;margin:17px 0 15px;letter-spacing:-1.5px}.course-intro .eyebrow{font-size:7px;letter-spacing:1px}.course-intro p{font-size:11px;max-width:310px}.course-rule{display:block;text-align:center;flex-shrink:0}.course-rule>strong{font-size:45px;letter-spacing:-3px}.course-rule>strong>span{font-size:19px}.course-rule>span{display:block;font-size:7px;margin-top:9px;letter-spacing:0}.course-layout{grid-template-columns:1fr;gap:23px}.course-sidebar{position:relative;top:0;padding:20px}.course-progress-head{font-size:8px}.course-storage-note{font-size:9px;margin-bottom:13px}.course-sidebar nav{display:flex;overflow-x:auto;gap:9px;padding:6px 3px 8px;scrollbar-width:thin}.course-group-label{display:none}.course-lesson-button{min-width:185px;max-width:210px;margin:0;background:#111e30;border-color:#2b435f;padding:11px 12px;font-size:10px;align-items:center}.course-lesson-button small{font-size:8px}.course-lesson-button .lesson-status{font-size:7px}.course-source-note{font-size:9px;line-height:1.9;margin-bottom:22px;padding:11px 14px}.course-lesson-header h2{font-size:29px}.course-theory p{font-size:12px}.course-formula-list{gap:11px}.course-formula .course-expression{font-size:21px}.course-formula h4{font-size:11px}.course-formula p{font-size:10px}.course-theory h3,.course-formulas-heading,.course-worked h3{font-size:18px}.course-lesson-meta span{font-size:8px;padding:6px 8px}.course-reading-action{padding:23px}.course-exam h2{font-size:22px}.course-result{padding:27px 23px}.course-result h2{font-size:27px}.course-result-number{font-size:70px}.course-review summary{font-size:11px;padding:15px}.course-review details>div{padding:14px 15px;font-size:11px}.course-footer{font-size:9px;padding:24px 22px;margin-top:45px}.course-entry-banner{padding:25px 0}.course-entry-inner{gap:20px}.course-entry-inner h2{font-size:24px}.course-entry-inner p{font-size:10px}.course-entry-inner .button{font-size:10px;gap:12px;padding:11px 14px}.course-entry-inner .eyebrow{font-size:7px;letter-spacing:1px}}
@media(max-width:480px){.course-header{padding:0 17px}.course-header .brand{font-size:16px}.course-header .brand>span{display:none}.course-header-links{gap:11px}.course-container{width:calc(100% - 30px)}.course-intro{align-items:flex-start;gap:13px;padding-top:29px}.course-intro h1{font-size:37px;margin-top:14px}.course-intro p{font-size:10px}.course-rule>strong{font-size:39px}.course-rule>strong>span{font-size:16px}.course-rule{padding-top:23px}.course-rule>span{font-size:6px}.course-intro .eyebrow{font-size:6px;letter-spacing:.7px}.course-sidebar{padding:17px}.course-lesson-header,.course-theory,.course-worked{padding:21px 18px;border-radius:11px}.course-lesson-header h2{font-size:26px}.course-lesson-header>p{font-size:11px}.course-lesson-meta{gap:7px}.course-formula-list{grid-template-columns:1fr}.course-formula{padding:20px}.course-formula .course-expression{font-size:24px}.course-formula h4{font-size:12px}.course-formula p{font-size:11px}.course-worked p,.course-worked li{font-size:11px}.course-reading-action{padding:21px 18px}.course-reading-action h3{font-size:16px}.course-reading-action .button{width:100%;font-size:10px;gap:10px;padding:12px}.course-reading-action p{font-size:10px}.course-exam{padding:21px 17px}.exam-top{align-items:flex-start;gap:12px;margin-bottom:22px}.exam-top .eyebrow{font-size:7px}.exam-top .text-button{font-size:9px}.exam-question-progress{font-size:8px;line-height:1.8}.course-exam h2{font-size:19px}.course-exam .quiz-option{font-size:12px;min-height:49px;padding:11px 13px}.exam-controls .button{font-size:10px;padding:10px 12px;min-height:42px}.exam-map{gap:7px;padding-top:20px}.exam-map button{width:30px;height:29px;font-size:9px}.exam-finish{align-items:stretch;flex-direction:column;gap:13px}.exam-finish p{font-size:9px;max-width:100%}.exam-finish .button{font-size:11px}.exam-save{font-size:8px}.course-result h2{font-size:25px}.course-result-number{font-size:63px}.course-result-number span{font-size:27px}.course-result p{font-size:11px}.course-result .button{font-size:10px}.course-review>h3{font-size:19px}.course-review summary{gap:9px;font-size:10px}.course-review summary .review-status{font-size:7px}.course-review details>div{font-size:10px}.course-entry-inner{display:block}.course-entry-inner .button{margin-top:17px}.course-entry-inner h2{font-size:26px}.course-entry-inner p{font-size:11px}.course-footer{font-size:8px;gap:12px;padding-left:17px;padding-right:17px}}