._0k8tMa_shell{color:#15364a;margin:44px 0 30px;scroll-margin-top:84px}._0k8tMa_header{justify-content:space-between;align-items:flex-end;gap:24px;margin-bottom:20px;display:flex}._0k8tMa_eyebrow{letter-spacing:.09em;color:#206982;font-size:12px;font-weight:850}._0k8tMa_header h2{letter-spacing:-.025em;margin:9px 0;font-size:clamp(24px,3vw,34px);line-height:1.3}._0k8tMa_header p{color:#56707d;max-width:720px;margin:0;font-size:15px;line-height:1.7}._0k8tMa_progress{background:#f3f8fa;border:1px solid #d9e6eb;border-radius:12px;width:175px;min-width:175px;padding:13px 16px}._0k8tMa_progress strong{color:#164d66;font-size:25px;line-height:1.2;display:block}._0k8tMa_progress span{color:#587381;margin-top:4px;font-size:12px;display:block}._0k8tMa_progressBar{background:#d7e9ed;border-radius:10px;height:6px;margin-top:10px;overflow:hidden}._0k8tMa_progressBar i{background:#167b76;border-radius:10px;height:100%;transition:width .2s;display:block}._0k8tMa_content{grid-template-columns:270px minmax(0,1fr);align-items:start;gap:17px;display:grid}._0k8tMa_menu{gap:7px;display:grid}._0k8tMa_menuItem{text-align:left;cursor:pointer;color:#284b5e;background:#fff;border:1px solid #dde8eb;border-radius:10px;align-items:center;gap:11px;min-height:69px;padding:10px 12px;display:flex}._0k8tMa_menuItem:hover{background:#f5fafb;border-color:#96bbcb}._0k8tMa_menuActive{background:#ebf5f8;border-color:#5b9bb1;box-shadow:inset 3px 0 #166b88}._0k8tMa_num{color:#6d91a1;font-size:14px;font-weight:900}._0k8tMa_menuText{flex:1;min-width:0}._0k8tMa_menuText strong{color:#21495d;font-size:14px;line-height:1.4;display:block}._0k8tMa_menuText small{color:#6b8290;margin-top:3px;font-size:12px;display:block}._0k8tMa_done{color:#14766a;font-size:17px;font-weight:900}._0k8tMa_lesson{background:#fff;border:1px solid #d6e5eb;border-radius:16px;min-width:0;padding:clamp(18px,3vw,30px);box-shadow:0 10px 32px #18415a09}._0k8tMa_lessonTop{color:#5a7888;justify-content:space-between;gap:12px;font-size:13px;font-weight:750;display:flex}._0k8tMa_lesson h3{letter-spacing:-.015em;margin:10px 0 7px;font-size:clamp(24px,2.4vw,29px)}._0k8tMa_goal{font-weight:650;color:#2e5a6c!important;font-size:17px!important}._0k8tMa_lesson h4{color:#173f56;margin:25px 0 8px;font-size:18px}._0k8tMa_lesson p{color:#4f6c7c;font-size:15px;line-height:1.75}._0k8tMa_codeHead{color:#587b8d;margin-top:20px;margin-bottom:6px;font-size:12px;font-weight:800}._0k8tMa_code{color:#e4f6fa;white-space:pre;tab-size:2;background:#122d42;border-radius:10px;padding:16px 18px;font-size:13px;line-height:1.65;overflow-x:auto}._0k8tMa_assignment{background:#f1f8fa;border-left:3px solid #18799a;border-radius:6px;margin-top:20px;padding:16px 18px}._0k8tMa_assignment strong{color:#1d556f;font-size:15px}._0k8tMa_assignment p{margin:7px 0 12px}._0k8tMa_assignment details{color:#3a6679;font-size:14px;line-height:1.65}._0k8tMa_assignment summary{cursor:pointer;font-weight:700}._0k8tMa_exercise{border-top:1px solid #e2ebef;margin-top:25px;padding-top:4px}._0k8tMa_question{font-weight:700;color:#264d60!important}._0k8tMa_options{gap:9px;display:grid}._0k8tMa_option{cursor:pointer;color:#385e6e;border:1px solid #d9e6eb;border-radius:9px;align-items:flex-start;gap:10px;padding:12px;font-size:15px;line-height:1.6;display:flex}._0k8tMa_option:hover{background:#f6fafb}._0k8tMa_option input{accent-color:#126c87;flex-shrink:0;margin-top:4px}._0k8tMa_chosen{background:#eff8fa;border-color:#5c9bb0}._0k8tMa_checkButton{color:#fff;cursor:pointer;background:#125e7e;border:0;border-radius:9px;justify-content:center;align-items:center;min-height:46px;margin-top:14px;padding:10px 20px;font-size:15px;font-weight:800;display:inline-flex}._0k8tMa_checkButton:disabled{opacity:.45;cursor:not-allowed}._0k8tMa_checkButton:not(:disabled):hover{background:#104c69}._0k8tMa_success,._0k8tMa_retry{border-radius:9px;padding:11px 13px;margin:12px 0 0!important}._0k8tMa_success{background:#ebf8f4;color:#126452!important}._0k8tMa_retry{background:#fff5eb;color:#855222!important}._0k8tMa_micro{color:#748794!important;margin:12px 0!important;font-size:12px!important}._0k8tMa_next{justify-content:space-between;gap:12px;margin-top:20px;display:flex}._0k8tMa_next button{color:#165b77;cursor:pointer;background:#fff;border:1px solid #bad2dc;border-radius:8px;min-height:44px;padding:9px 13px;font-size:14px;font-weight:750}._0k8tMa_next button:disabled{opacity:.32;cursor:not-allowed}._0k8tMa_notice{color:#667c89;margin:15px 0;font-size:13px;line-height:1.7}@media (max-width:850px){._0k8tMa_content{grid-template-columns:1fr}._0k8tMa_menu{grid-template-columns:repeat(3,minmax(0,1fr));gap:7px}._0k8tMa_menuItem{min-height:83px;padding:9px}._0k8tMa_menuText strong{font-size:13px}._0k8tMa_num{font-size:12px}}@media (max-width:590px){._0k8tMa_header{flex-direction:column;align-items:stretch;gap:13px}._0k8tMa_progress{grid-template-columns:70px 1fr;align-items:center;column-gap:9px;width:auto;min-width:0;padding:10px 13px;display:grid}._0k8tMa_progress strong{grid-row:span 2}._0k8tMa_progressBar{margin:7px 0 0}._0k8tMa_menu{grid-template-columns:repeat(2,minmax(0,1fr))}._0k8tMa_menuItem{min-height:69px}._0k8tMa_lesson{padding:18px 15px}._0k8tMa_lesson h3{font-size:23px}._0k8tMa_code{padding:13px;font-size:12px}._0k8tMa_header h2{font-size:26px}}@media (prefers-reduced-motion:reduce){._0k8tMa_progressBar i{transition:none}}