.lesson-shell{color:#252521;background:#f5f5f2;flex-direction:column;min-height:100vh;display:flex}.lesson-site-header{border-bottom:1px solid #d4d4ce;justify-content:space-between;align-items:center;gap:20px;width:min(1120px,100% - 40px);min-height:82px;margin:auto;display:flex}.lesson-site-header>a{align-items:center;min-height:44px;text-decoration:none;display:inline-flex}.lesson-site-header nav{align-items:center;gap:24px;font-size:16px;font-weight:750;display:flex}.lesson-site-header nav a{color:#33332f;text-underline-offset:4px;align-items:center;min-height:44px;display:inline-flex}.lesson-main{flex:1;width:min(1000px,100% - 40px);margin:0 auto;padding:30px 0 64px}.lesson-skip{z-index:100;background:#fff;padding:12px;position:fixed;top:8px;left:12px;transform:translateY(-200%)}.lesson-skip:focus{transform:none}.lesson-shell :focus-visible{outline-offset:4px;outline:3px solid #c2410c}.lesson-shell [id]{scroll-margin-top:20px}.lesson-breadcrumb{color:#64645e;flex-wrap:wrap;align-items:center;gap:8px 14px;margin-bottom:24px;font-size:14px;line-height:1.6;display:flex}.lesson-breadcrumb a,.lesson-back a,.lesson-other-levels a{color:#9a3412;text-underline-offset:4px}.lesson-page-heading{padding:18px 0 30px}.lesson-eyebrow{color:#9a3412;font-size:14px;font-weight:800;line-height:1.5;display:block}.lesson-page-heading h1{letter-spacing:-.025em;overflow-wrap:anywhere;max-width:22ch;margin:14px 0 16px;font-size:clamp(30px,4.6vw,48px);line-height:1.14}.lesson-page-heading>p{color:#53534d;max-width:70ch;font-size:18px;line-height:1.7}.lesson-actions{flex-wrap:wrap;align-items:center;gap:18px;margin-top:24px;display:flex}.lesson-actions>a:not(.lesson-primary){color:#494944;text-underline-offset:4px;font-size:16px;text-decoration:underline}.lesson-shell .lesson-primary{color:#fff;background:#a83c10;border:1px solid #9a3412;border-radius:5px;justify-content:center;align-items:center;gap:16px;min-height:48px;padding:13px 18px;font-size:16px;font-weight:750;line-height:1.5;text-decoration:none;display:inline-flex}.lesson-primary:hover{background:#7c2d12}.lesson-contents{background:#eeeee8;border:1px solid #d0d0c8;border-radius:5px;flex-wrap:wrap;align-items:center;gap:12px 22px;margin-bottom:32px;padding:18px 22px;font-size:15px;display:flex}.lesson-contents strong{color:#44443e;width:100%}.lesson-contents a{text-underline-offset:4px;text-decoration:underline}.lesson-document .topic-guide-content{gap:28px;display:grid}.lesson-document .topic-guide-definition,.lesson-document .topic-guide-explanation,.lesson-document .topic-guide-worked-example,.lesson-document .topic-guide-self-check,.lesson-document .topic-guide-advanced,.lesson-document .topic-guide-sources{background:#fff;border:1px solid #d8d8d0;border-radius:5px;padding:26px}.lesson-document .topic-guide-goal{background:#faf0e8;border-left:3px solid #a83c10;margin:0 0 24px;padding:14px 18px}.lesson-document .topic-guide-worked-example ol{gap:16px;max-width:78ch;margin:24px 0 0;padding-left:28px;display:grid}.lesson-document .topic-guide-worked-example li{padding-left:8px}.lesson-document .topic-guide-worked-example li::marker{color:#9a3412;font-weight:800}.lesson-document .topic-guide-check-answer{background:#f7f7f2;border:1px solid #cfcfc5;margin-top:20px;padding:14px 18px}.lesson-document .topic-guide-check-answer summary{cursor:pointer;min-height:32px;font-weight:750}.lesson-document .topic-guide-check-answer[open] summary{margin-bottom:16px}.lesson-document .topic-guide-sources{background:#eeeee8}.lesson-document .topic-guide-sources ul{margin-top:16px}.lesson-document .topic-guide-sources a{color:#9a3412;text-underline-offset:4px;overflow-wrap:anywhere}.lesson-document .topic-guide-details article{background:#f7f7f2;border-left-color:#a83c10}.lesson-document h2,.lesson-related h2,.lesson-other-levels h2{letter-spacing:-.015em;margin:0 0 16px;font-size:24px;line-height:1.35}.lesson-document h3{margin:0 0 10px;font-size:20px;line-height:1.5}.lesson-document .topic-guide-concepts{gap:28px}.lesson-document .topic-guide-concepts article+article{border-top:1px solid #e3e3dc;padding-top:24px}.lesson-document .topic-guide-prose{gap:13px;max-width:78ch}.lesson-document .topic-guide-content p,.lesson-document .topic-guide-content li{font-size:17px;line-height:1.75}.lesson-document .topic-guide-cheat{padding:20px 24px}.lesson-document .topic-guide-cheat span{letter-spacing:.045em;font-size:13px}.lesson-document .topic-guide-cheat strong{font-size:17px;font-weight:650;line-height:1.7}.lesson-document .topic-guide-study-grid{grid-template-columns:1fr;gap:24px}.lesson-document .topic-guide-study-grid>section{border-radius:5px;padding:26px}.lesson-document .topic-guide-warning{margin-top:20px;padding:16px;font-size:16px;line-height:1.7}.lesson-document .topic-guide-coverage{background:0 0;border:0;padding:0}.lesson-document .topic-guide-subtopics{border-radius:5px}.lesson-document .topic-guide-subtopic>summary{grid-template-columns:32px minmax(0,1fr) 22px;padding:18px 22px}.lesson-document .topic-guide-subtopic>summary strong{font-size:17px;line-height:1.5}.lesson-document .topic-guide-subtopic>summary span{font-size:14px}.lesson-document .topic-guide-subtopic-body{padding:6px 28px 26px 64px}.lesson-figure{background:#fff;border:1px solid #d4d4cc;border-radius:5px;margin:0;padding:26px}.lesson-figure h3{margin:0 0 22px;font-size:20px;line-height:1.4}.lesson-figure svg{width:100%;max-width:680px;height:auto;margin:0 auto;display:block;overflow:visible}.data-home .knowledge-topic-detail .lesson-figure svg{width:100%;height:auto}.lesson-figure svg text{fill:#373730;font-family:inherit;font-size:19px}.lesson-figure figcaption{color:#55554f;border-top:1px solid #e5e5de;margin-top:20px;padding-top:18px;font-size:16px;line-height:1.75}.lesson-table-wrap{overscroll-behavior-x:contain;overflow-x:auto}.lesson-table-wrap table{border-collapse:collapse;text-align:left;width:100%;font-size:16px;line-height:1.65}.lesson-table-wrap th,.lesson-table-wrap td{vertical-align:top;border:1px solid #deded6;min-width:105px;padding:14px 16px}.lesson-table-wrap th{font-weight:700}.lesson-table-wrap thead{background:#f1f1e9}.lesson-table-wrap tbody th{background:#fafaf7}.lesson-steps{gap:0;margin:0;padding:0;list-style:none;display:grid}.lesson-figure .lesson-steps li{gap:18px;padding:0 0 26px;display:flex;position:relative}.lesson-steps li:not(:last-child):before{content:"";background:#ead2c2;width:2px;position:absolute;top:38px;bottom:4px;left:18px}.lesson-steps li:last-child{padding-bottom:0}.lesson-step-number{color:#9a3412;background:#ffedd5;border-radius:50%;flex:0 0 38px;place-items:center;height:38px;font-size:16px;font-weight:800;display:grid}.lesson-steps strong{padding-top:3px;display:block}.lesson-figure .lesson-steps p{margin:4px 0 0}.lesson-timeline{margin:0;padding:0 0 0 9px;list-style:none}.lesson-timeline li{border-left:2px solid #ead2c2;padding:0 0 26px 26px;position:relative}.lesson-timeline li:before{content:"";background:#fff;border:2px solid #a83c10;border-radius:50%;width:12px;height:12px;position:absolute;top:4px;left:-7px}.lesson-timeline li:last-child{border-color:#0000;padding-bottom:0}.lesson-timeline strong{color:#9a3412;font-size:18px}.lesson-figure .lesson-timeline p{margin:6px 0 0;line-height:1.7}.lesson-slider{gap:14px;max-width:580px;margin:10px auto 20px;font-size:16px;display:grid}.lesson-slider input{accent-color:#b13e0d;width:100%;min-height:36px}.lesson-readout{background:#faf0e8;border-radius:5px;flex-wrap:wrap;justify-content:center;gap:14px 32px;padding:16px;display:flex}.lesson-readout span{gap:5px;font-size:15px;display:grid}.lesson-readout strong{font-size:20px}.lesson-document .lesson-figure-tip{margin:18px 0 0;font-size:15px}.lesson-next-step{background:#edece4;border-radius:5px;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:20px;margin-top:36px;padding:26px;display:flex}.lesson-next-step p{max-width:50ch;margin:0;font-size:16px;line-height:1.7}.lesson-related{grid-template-columns:1fr 1fr;gap:16px;margin-top:40px;display:grid}.lesson-related h2{grid-column:1/-1;margin-bottom:0}.lesson-related>a{background:#fff;border:1px solid #cfcfc5;border-radius:5px;padding:20px;text-decoration:none}.lesson-related>a>span{color:#66665e;margin-bottom:10px;font-size:14px;display:block}.lesson-related strong{font-size:18px}.lesson-other-levels{border-top:1px solid #d0d0c8;margin-top:32px;padding-top:28px}.lesson-other-levels h2{font-size:20px}.lesson-other-levels ul{flex-wrap:wrap;gap:12px 24px;padding:0;font-size:16px;list-style:none;display:flex}.lesson-practice-heading{margin-bottom:20px}.lesson-practice-heading h1{margin:8px 0 0;font-size:clamp(26px,4vw,36px);line-height:1.2}.lesson-shell .exam-workspace.topic-practice{width:100%;max-width:none;min-height:100svh;box-shadow:none;background:0 0;border:0;border-radius:0;margin:0;padding:0;display:block}.lesson-shell .topic-practice .exam-main{min-width:0;padding:0}.lesson-shell .topic-practice .task-card{background:#fff;border:1px solid #cfcfc5;border-radius:5px;margin:0;padding:28px;scroll-margin-top:16px}.lesson-shell .topic-practice .task-card>h2{font-size:clamp(20px,2.8vw,26px);line-height:1.5}.lesson-shell .topic-practice .sample-question-meta{flex-wrap:wrap;gap:12px;margin-top:0}.lesson-shell.data-home .topic-practice .sample-question-meta>span{color:var(--data-red);background:0 0;padding:0;font-size:15px}.lesson-shell .topic-practice .sample-answers button{min-height:54px;font-size:17px;line-height:1.6}.lesson-back{margin-top:28px;font-size:16px;line-height:1.7}.knowledge-topic-links{flex-wrap:wrap;gap:12px 24px;padding:0 22px 18px;display:flex}.knowledge-topic-links a{color:#9a3412;text-underline-offset:4px;align-items:center;gap:8px;min-height:40px;font-size:15px;font-weight:750;text-decoration:underline;display:inline-flex}.knowledge-topic-links svg{width:16px}.exam-study-plan{background:#fff;border:1px solid #cfcfc5;border-radius:5px;margin:24px 0 32px;padding:24px}.exam-plan-heading{flex-wrap:wrap;justify-content:space-between;align-items:flex-start;gap:16px;display:flex}.exam-plan-heading h2,.exam-material-heading{margin:0 0 12px;font-size:24px;line-height:1.35}.exam-plan-heading p,.exam-plan-editor p{color:#55554f;max-width:75ch;margin:0;font-size:16px;line-height:1.7}.exam-plan-heading>button{cursor:pointer;background:#f7f7f2;border:1px solid #bdbdb2;border-radius:4px;min-height:44px;padding:8px 12px;font-weight:700}.exam-plan-editor{gap:12px;margin-top:24px;display:grid}.exam-plan-editor label{font-weight:750}.exam-plan-editor textarea{width:100%;font:inherit;resize:vertical;border:1px solid #bdbdb2;border-radius:4px;padding:14px 16px;font-size:17px;line-height:1.7}.exam-plan-editor .lesson-primary{cursor:pointer;justify-self:start}.exam-plan-progress{color:#9a3412;margin:20px 0 16px;font-weight:750}.exam-plan-topics{gap:16px;display:grid}.exam-plan-topic{border:1px solid #d4d4cc;border-radius:4px;overflow:hidden}.exam-plan-complete{cursor:pointer;background:#f5f5ef;align-items:center;gap:10px;min-height:44px;padding:10px 16px;font-size:14px;display:flex}.exam-plan-complete input{accent-color:#a83c10;width:18px;height:18px}.exam-plan-topic summary{cursor:pointer;align-items:baseline;gap:14px;min-height:56px;padding:18px 16px;list-style:none;display:flex}.exam-plan-topic summary::-webkit-details-marker{display:none}.exam-plan-topic summary>span{color:#9a3412;font-weight:750}.exam-plan-topic summary strong{overflow-wrap:anywhere;font-size:18px;line-height:1.5}.exam-plan-body{padding:0 20px 20px}.exam-plan-body h3{margin:20px 0 12px;font-size:18px}.exam-plan-body ol{padding-left:24px}.exam-plan-body li{margin-bottom:10px;font-size:16px;line-height:1.75}.exam-plan-body ul{padding:0;list-style:none}.exam-plan-body ul li{flex-wrap:wrap;gap:10px 24px;display:flex}.exam-plan-body a{color:#9a3412;text-underline-offset:4px;align-items:center;min-height:36px;display:inline-flex}.exam-plan-note{color:#66665e;font-size:14px;line-height:1.7}@media (max-width:640px){.exam-study-plan,.lesson-document .topic-guide-explanation,.lesson-document .topic-guide-worked-example,.lesson-document .topic-guide-self-check,.lesson-document .topic-guide-advanced,.lesson-document .topic-guide-sources{padding:20px 16px}.lesson-site-header{gap:12px;width:calc(100% - 28px);min-height:74px}.lesson-site-header nav{gap:14px;font-size:14px}.lesson-site-header .brand-logo-word{font-size:21px}.lesson-main{width:calc(100% - 28px);padding-top:20px}.lesson-breadcrumb{gap:5px 10px}.lesson-page-heading>p{font-size:17px}.lesson-document h2{font-size:22px}.lesson-contents,.lesson-document .topic-guide-definition,.lesson-document .topic-guide-study-grid>section,.lesson-figure,.lesson-next-step{padding:20px 16px}.lesson-document .topic-guide-subtopic>summary{grid-template-columns:24px minmax(0,1fr) 20px;gap:8px;padding:15px 14px}.lesson-document .topic-guide-subtopic-body{padding:6px 16px 22px}.lesson-table-wrap th,.lesson-table-wrap td{padding:10px 12px}.lesson-figure svg text{font-size:23px}.lesson-related{grid-template-columns:1fr}.lesson-shell .topic-practice .task-card{padding:20px 16px}.lesson-actions .lesson-primary{width:100%}}@media (prefers-reduced-motion:reduce){.lesson-shell{scroll-behavior:auto}}.lesson-shell .topic-practice .sample-question-tools{flex-wrap:wrap;align-items:center;gap:12px;display:flex}.lesson-shell .topic-practice .sample-question-tools small{color:#68685f;font-size:12px}.lesson-shell .topic-practice .sample-question-tools button,.lesson-shell .topic-practice .guest-tool-toggle{color:#45453e;min-height:44px;font:inherit;cursor:pointer;background:#fafaf6;border:1px solid #c4c4ba;border-radius:4px;justify-content:center;align-items:center;gap:8px;padding:9px 12px;font-size:15px;display:inline-flex}.lesson-shell .topic-practice button svg{flex-shrink:0;width:18px;height:18px}.lesson-shell .topic-practice .sample-materials{gap:12px;margin:20px 0;display:grid}.lesson-shell .topic-practice .sample-material{background:#f5f5ee;border:1px solid #d8d8cf;border-left:4px solid #a83c10;min-width:0;margin:0;padding:18px}.lesson-shell .topic-practice .sample-material>span{color:#9a3412;margin-bottom:10px;font-size:13px;font-weight:750;display:block}.lesson-shell .topic-practice .sample-material p{white-space:pre-wrap;margin:0;font-size:17px;line-height:1.75}.lesson-shell .topic-practice .sample-material img{object-fit:contain;max-width:100%;max-height:560px;margin:12px auto;display:block}.lesson-shell .topic-practice .sample-material figcaption{font-size:15px;line-height:1.6}.lesson-shell .topic-practice .sample-material-table>div{overflow-x:auto}.lesson-shell .topic-practice .sample-material table{border-collapse:collapse;background:#fff;width:100%;font-size:16px}.lesson-shell .topic-practice .sample-material td,.lesson-shell .topic-practice .sample-material th{text-align:left;border:1px solid #d0d0c5;padding:10px 12px}.lesson-shell .topic-practice .sample-answers{grid-template-columns:1fr;margin-top:22px;padding:0}.lesson-shell .topic-practice .sample-answers button{color:#35352e;background:#fff;border:1px solid #c7c7bd;border-radius:5px;padding:12px 16px}.lesson-shell .topic-practice .sample-answers button>span{color:#45453c;background:#eeeee7;border-radius:4px;font-size:14px}.lesson-shell .topic-practice .sample-answers button:hover:not(:disabled),.lesson-shell .topic-practice .sample-answers button.is-selected{background:#fff4e9;border-color:#a83c10}.lesson-shell .topic-practice .sample-answers button.is-correct{color:#205238;background:#edf8ef;border-color:#2e785a}.lesson-shell .topic-practice .sample-answers button.is-wrong{color:#8a3029;background:#fff0ec;border-color:#b4483e}.lesson-shell .topic-practice .sample-answer-actions{justify-content:flex-end;margin-top:16px;display:flex}.lesson-shell .topic-practice .sample-check-answer,.lesson-shell .topic-practice .sample-coach-actions button,.lesson-shell .topic-practice .sample-feedback button{color:#fff;cursor:pointer;background:#a83c10;border:1px solid #9a3412;border-radius:4px;justify-content:center;align-items:center;gap:8px;min-height:46px;padding:11px 16px;font-size:16px;font-weight:750;display:inline-flex}.lesson-shell .topic-practice .sample-check-answer:disabled{color:#737369;cursor:not-allowed;background:#e7e7df;border-color:#d0d0c5}.lesson-shell .topic-practice .sample-coach{background:#fff3e8;border:1px solid #e7ccba;border-radius:5px;margin-top:22px;padding:20px}.lesson-shell .topic-practice .sample-coach header{align-items:center;gap:14px;display:flex}.lesson-shell .topic-practice .sample-coach header img{object-fit:cover;object-position:center 18%;border-radius:50%;width:48px;height:48px}.lesson-shell .topic-practice .sample-coach header div{gap:5px;display:grid}.lesson-shell .topic-practice .sample-coach header span{color:#9a3412;font-size:13px;font-weight:750}.lesson-shell .topic-practice .sample-coach header strong{font-size:17px;line-height:1.5}.lesson-shell .topic-practice .sample-coach ol{gap:16px;margin:20px 0;padding:0;list-style:none;display:grid}.lesson-shell .topic-practice .sample-coach li{align-items:flex-start;gap:12px;display:flex}.lesson-shell .topic-practice .sample-coach li>span{color:#fff;background:#a83c10;border-radius:50%;flex-shrink:0;place-items:center;width:28px;height:28px;font-size:14px;display:grid}.lesson-shell .topic-practice .sample-coach li p{margin:0;font-size:17px;line-height:1.7}.lesson-shell .topic-practice .sample-coach-loading{align-items:center;gap:10px;margin:20px 0;display:flex}.lesson-shell .topic-practice .sample-coach-loading svg{width:20px}.lesson-shell .topic-practice .sample-coach-actions{flex-wrap:wrap;align-items:center;gap:12px;display:flex}.lesson-shell .topic-practice .sample-coach-actions small{font-size:14px;line-height:1.6}.lesson-shell .topic-practice .sample-feedback{border-radius:5px;flex-wrap:wrap;margin:20px 0 0;padding:20px}.lesson-shell .topic-practice .sample-feedback strong{font-size:18px}.lesson-shell .topic-practice .sample-feedback p{margin-top:8px;font-size:17px;line-height:1.7}.lesson-shell .topic-practice .guest-tool-row{flex-wrap:wrap;align-items:center;gap:12px 20px;margin-top:18px;display:flex}.lesson-shell .topic-practice .guest-tool-row small{color:#67675e;font-size:14px;line-height:1.5}.lesson-shell .topic-practice .guest-tool-label{gap:8px;display:inline-flex}.lesson-shell .topic-practice .guest-tools{margin-top:14px}.lesson-shell .topic-practice .guest-tools label{gap:10px;font-size:16px;display:grid}.lesson-shell .topic-practice .guest-tools textarea{background:#fff;border:1px solid #bdbdb1;border-radius:5px;width:100%;padding:16px;font-size:17px;line-height:1.7}.lesson-shell .topic-practice .sample-footer{flex-wrap:wrap;margin-top:22px;font-size:15px;line-height:1.6}.lesson-shell .topic-practice .sample-footer a{white-space:normal;flex-shrink:0}@media (max-width:640px){.lesson-shell .topic-practice .sample-answer-actions>button{width:100%}.lesson-shell .topic-practice .sample-coach{padding:16px}.lesson-shell .topic-practice .sample-question-tools{justify-content:space-between;width:100%}}@media (max-width:480px){.lesson-site-header{flex-wrap:wrap;row-gap:2px;padding-block:10px}.lesson-site-header nav{justify-content:space-between;width:100%}}
