:root{font-family:"Segoe UI","Helvetica Neue",sans-serif;color:#282b29;background:#fbfbf9;font-size:15px;line-height:1.6;--muted:#6c716b;--line:#e7e8e2;--green:#edf3ec}*{box-sizing:border-box}body{margin:0}a{color:inherit;text-underline-offset:4px}button,input,textarea{font:inherit}button,.button{cursor:pointer;display:inline-flex;align-items:center;justify-content:center;gap:10px;border:1px solid #292e29;background:#292e29;color:white;border-radius:5px;padding:11px 19px;text-decoration:none;font-weight:600;line-height:1.45}button:hover,.button:hover{background:#454b44}button:disabled{opacity:.55;cursor:wait}.secondary{background:transparent;color:#30382f;border-color:#cfd3ca}.secondary:hover{background:#f0f2ec}.textbutton{background:none;color:#414b40;border:0;padding:6px 0;text-decoration:underline;font-weight:500}a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible{outline:3px solid #657c58;outline-offset:4px}.shell{display:grid;grid-template-columns:236px 1fr;min-height:100vh}.rail{background:#f2f3ee;border-right:1px solid var(--line);padding:42px 26px;display:flex;flex-direction:column;position:sticky;top:0;height:100vh}.brand{font-size:23px;font-weight:700;text-decoration:none;letter-spacing:-1px}.brand span{font-weight:400;color:#677060}.brand small{display:block;font-size:12px;letter-spacing:1.6px;text-transform:uppercase;font-weight:500;margin-top:9px;color:var(--muted)}nav{display:grid;gap:8px;margin-top:62px}nav a{text-decoration:none;padding:12px;border-radius:5px;font-weight:600}nav a span{font-size:11px;color:#7a8273;margin-right:16px}nav a.active{background:#e3e8dc}nav a:hover{background:#e9ece4}.rail-bottom{margin-top:auto;font-size:12px}.rail-bottom>a{display:block;margin-bottom:28px}.badge,.tag{display:inline-block;font-size:11px;line-height:1.5;letter-spacing:.05em;text-transform:uppercase;background:var(--green);color:#3e5b39;padding:4px 9px;border-radius:4px;margin:0}.disclosure{color:var(--muted);font-size:12px;max-width:160px;margin-top:10px}.workspace{min-width:0}.topbar{height:78px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 54px;font-size:12px;color:var(--muted)}main{padding:54px 54px 80px;max-width:1230px;margin:0 auto;min-height:calc(100vh - 160px)}.eyebrow{font-size:11px;text-transform:uppercase;letter-spacing:1.8px;font-weight:600;color:#6a7563;margin:0 0 18px}h1{font-weight:500;letter-spacing:-1.9px;font-size:48px;line-height:1.13;margin:0 0 21px;max-width:820px}h2{font-weight:600;font-size:23px;letter-spacing:-.6px;line-height:1.3;margin:0 0 15px}h3{font-weight:600;font-size:17px;line-height:1.4;margin:0 0 7px}p{margin:0 0 16px}.intro{font-size:17px;color:var(--muted);max-width:680px;line-height:1.65}.heading{margin-bottom:36px}.progress-panel{display:grid;grid-template-columns:1fr auto;align-items:center;gap:24px;background:#f0f3ea;border:1px solid #e2e7db;border-radius:7px;padding:25px 29px;margin:32px 0 44px}.progress-panel p{color:#66705f;margin:6px 0 0;font-size:13px}.progress-track{height:4px;background:#dce3d4;max-width:340px;margin-top:15px;overflow:hidden}.progress-fill{height:100%;background:#718663}.section-head{display:flex;align-items:center;justify-content:space-between;gap:20px;margin:32px 0 14px}.section-head h2{margin:0}.search{border:1px solid #d9dcd3;background:white;border-radius:5px;padding:10px 13px;width:244px;max-width:100%}.chapter-list{border-top:1px solid var(--line)}.chapter-row{display:grid;grid-template-columns:48px 1fr auto;gap:19px;align-items:center;border-bottom:1px solid var(--line);padding:23px 2px;text-decoration:none}.chapter-row:hover{background:#f5f6f0}.number{font-size:13px;color:#7b8473;font-variant-numeric:tabular-nums}.chapter-row p{font-size:13px;color:var(--muted);margin:4px 0 0;max-width:650px}.row-meta{text-align:right;font-size:12px;color:var(--muted);white-space:nowrap}.read{color:#41633c;background:#edf3e9;padding:4px 8px;border-radius:4px}.chapter-row h3{margin:0}.arrow{margin-left:19px;font-size:18px}.back{display:inline-block;font-size:13px;color:var(--muted);margin-bottom:27px}.lesson-layout{display:grid;grid-template-columns:minmax(0,1fr) 215px;gap:55px}.lesson-body{max-width:720px}.lesson-body p,.lesson-body li{font-size:16px;line-height:1.85}.lesson-body h2{margin-top:35px}.lesson-body ul,.lesson-body ol{padding-left:24px}.lesson-nav{border-left:1px solid var(--line);padding-left:22px;font-size:12px}.lesson-nav a{display:block;text-decoration:none;color:var(--muted);padding:7px 0}.lesson-nav a.active{font-weight:600;color:#2e4328}.lesson-actions{display:flex;gap:12px;flex-wrap:wrap;border-top:1px solid var(--line);padding-top:26px;margin-top:40px}.note{background:#f2f3ed;border-left:3px solid #b9c4ad;padding:18px 22px;margin:24px 0;font-size:14px}.muted{color:var(--muted)}.small{font-size:13px}.assessment-list{border-top:1px solid var(--line);margin-top:30px}.assessment-card{padding:29px 0;border-bottom:1px solid var(--line);display:grid;grid-template-columns:1fr auto;gap:28px}.assessment-card p{max-width:600px;color:var(--muted);font-size:14px}.meta{display:flex;gap:18px;flex-wrap:wrap;font-size:12px;color:var(--muted);margin:15px 0}.source-list{padding-left:20px;font-size:14px}.source-list li{margin-bottom:8px}.history{margin-top:45px}.history-row{display:flex;justify-content:space-between;gap:18px;border-bottom:1px solid var(--line);padding:17px 0;font-size:14px}.history-row small{display:block;color:var(--muted)}.quiz-header{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-bottom:28px}.save-status{font-size:12px;color:#5e7055}.save-status.error,.error{color:#9a352e}.quiz-layout{display:grid;grid-template-columns:minmax(0,1fr) 225px;gap:40px}.question-panel{background:white;border:1px solid var(--line);border-radius:7px;padding:32px}.question-panel h2{font-size:23px;line-height:1.5;font-weight:500;letter-spacing:-.3px}.option{display:flex;align-items:flex-start;gap:13px;padding:15px 17px;border:1px solid #dfe3da;border-radius:5px;margin:11px 0;cursor:pointer;line-height:1.55}.option:has(input:checked){border-color:#718663;background:#f0f4ec}.option input{margin:5px 0 0;accent-color:#4d6541;flex-shrink:0}.option strong{display:inline-block;margin-right:9px}.answer-text{width:100%;resize:vertical;min-height:190px;border:1px solid #cdd4c6;border-radius:5px;padding:16px;line-height:1.7}.quiz-controls{display:flex;justify-content:space-between;gap:12px;margin-top:27px}.question-map{display:grid;grid-template-columns:repeat(5,1fr);gap:7px;margin:18px 0}.question-map button{padding:8px 0;background:white;border-color:#d7dccf;color:#535d4b;font-size:12px;border-radius:4px}.question-map button.answered{background:#eaf1e3;border-color:#d0dcc5}.question-map button.current{outline:2px solid #596e4e;outline-offset:1px}.quiz-sidebar p{font-size:12px;color:var(--muted)}fieldset{border:0;padding:0;margin:0}legend{padding:0;width:100%}.reading-links{font-size:13px;margin-top:20px}.reading-links a{display:block;margin-top:7px}.review-row{border-bottom:1px solid var(--line);padding:22px 0}.review-row p{white-space:pre-wrap;margin:9px 0}.declaration{display:flex;align-items:flex-start;gap:12px;padding:22px;background:#f1f3ec;margin:30px 0}.declaration input{margin-top:6px;accent-color:#4d6541}.result-summary{display:grid;grid-template-columns:1fr 1fr;gap:25px;padding:29px;border:1px solid var(--line);background:#f3f5ee;margin:27px 0}.result-summary strong{font-size:34px;display:block;font-weight:500;line-height:1.4}.document-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 35px;margin:24px 0}.document-grid a{display:block;padding:17px 0;border-bottom:1px solid var(--line);font-size:14px}.reference{border-bottom:1px solid var(--line);padding:20px 0}.reference p{margin:0;font-size:13px;color:var(--muted)}table{border-collapse:collapse;width:100%;font-size:14px}td,th{padding:12px;border:1px solid var(--line);text-align:left;overflow-wrap:anywhere}.table-wrap{overflow:auto}footer{padding:22px 54px;border-top:1px solid var(--line);font-size:11px;color:var(--muted);display:flex;justify-content:space-between;gap:20px}.sr-only{position:absolute;width:1px;height:1px;margin:-1px;overflow:hidden;clip:rect(0,0,0,0)}.skip{position:fixed;top:-100px;left:20px;padding:10px;background:white;z-index:5}.skip:focus{top:10px}.empty{padding:35px 0;color:var(--muted)}.error-box{padding:26px;border:1px solid #e4cdc8;background:#fbf2ef;border-radius:6px}.error-box p{margin-bottom:18px}@media(max-width:1100px){main{padding:40px 32px 60px}.topbar{padding:0 32px}.shell{grid-template-columns:206px 1fr}.rail{padding:32px 19px}.lesson-layout,.quiz-layout{gap:25px;grid-template-columns:minmax(0,1fr) 180px}h1{font-size:41px}.question-panel{padding:24px}}@media(max-width:820px){.shell{display:block}.rail{position:static;height:auto;display:grid;grid-template-columns:1fr auto;padding:19px 24px;border-right:0;border-bottom:1px solid var(--line);gap:18px}.brand{font-size:20px}.brand small{font-size:9px;margin-top:3px}.rail nav{display:flex;gap:5px;margin:0;align-items:center}nav a{padding:9px;font-size:13px}nav a span{display:none}.rail-bottom{grid-column:1/-1;display:flex;align-items:center;gap:15px;flex-wrap:wrap}.rail-bottom>a{margin:0;font-size:11px}.rail-bottom .badge{margin-left:auto;font-size:9px}.disclosure{max-width:none;margin:0;font-size:10px}.topbar{height:52px}.lesson-layout,.quiz-layout{display:flex;flex-direction:column}.lesson-nav{order:2;display:none}.quiz-sidebar{border-top:1px solid var(--line);padding-top:20px}.question-map{grid-template-columns:repeat(10,1fr)}.quiz-sidebar h3{font-size:14px}.quiz-header{align-items:flex-start}.assessment-card{gap:20px}.lesson-body{max-width:100%}}@media(max-width:520px){main{padding:33px 21px 50px}.rail{padding:17px 21px;gap:15px}.topbar{padding:0 21px;font-size:10px}.rail-bottom{gap:9px}.rail-bottom .disclosure{width:100%}h1{font-size:35px;letter-spacing:-1.2px}.intro{font-size:15px}.heading{margin-bottom:26px}.progress-panel{grid-template-columns:1fr;padding:22px;gap:18px;margin:27px 0 32px}.progress-panel .button{justify-self:start}.section-head{align-items:flex-start;flex-direction:column;gap:15px}.search{width:100%}.chapter-row{grid-template-columns:27px 1fr;gap:10px;padding:20px 0}.chapter-row h3{font-size:15px}.chapter-row p{font-size:12px}.row-meta{grid-column:2;text-align:left}.arrow{float:right}.assessment-card{grid-template-columns:1fr;gap:6px}.assessment-card .button{justify-self:start}.document-grid{grid-template-columns:1fr}.question-panel{padding:21px 17px}.question-panel h2{font-size:20px}.question-map{grid-template-columns:repeat(7,1fr)}.result-summary{padding:22px;gap:16px}.result-summary strong{font-size:29px}.quiz-controls button{padding:10px 14px}.option{padding:13px 11px}.history-row{flex-direction:column;gap:8px}footer{padding:20px 21px;display:block}footer span{display:block;margin-top:5px}.quiz-header{flex-direction:column;gap:8px}.lesson-actions .button{width:100%}}@media(prefers-reduced-motion:no-preference){button,a{transition:background .15s ease}button:active{transform:translateY(1px)}}

/* Company sign-in */
[hidden]{display:none!important}.account-actions{display:flex;align-items:center;gap:24px}.account-actions button{font-size:13px;padding:0}.login-body{min-height:100vh;background:#fbfbfa}.login-top{display:flex;align-items:center;justify-content:space-between;padding:32px 5vw;border-bottom:1px solid #eaeaea}.login-top .brand{margin:0}.login-label{font-size:13px;color:#68706a}.login-main{width:min(1110px,90vw);margin:72px auto 88px;display:grid;grid-template-columns:1.25fr 1fr;gap:80px;align-items:center;outline:none}.login-intro h1{font-size:clamp(36px,4.5vw,58px);line-height:1.12;letter-spacing:-.04em;margin:16px 0 24px}.login-intro .intro{max-width:480px;font-size:18px;line-height:1.6}.login-topics{margin-top:40px;display:grid;gap:22px}.login-topics>div{display:flex;gap:20px}.login-topics h2{font-size:16px;margin:0 0 5px}.login-topics p{font-size:14px;line-height:1.6;color:#68706a;margin:0;max-width:390px}.login-panel{background:#fff;border:1px solid #eaeaea;border-radius:8px;padding:36px}.login-panel h2{font-size:25px;line-height:1.25;margin:8px 0 18px;letter-spacing:-.025em}.login-panel>p{font-size:15px;line-height:1.7;color:#5d665f}.login-button{display:flex;justify-content:space-between;width:100%;margin:24px 0 14px}.login-status{padding:14px 16px;background:#f0f3eb;border-radius:4px;font-size:13px!important}.login-policy{margin-top:26px;border-top:1px solid #eaeaea;padding-top:20px}.login-policy p{font-size:13px;line-height:1.6;color:#5d665f}.login-footer{padding:24px 5vw;margin:0;border-top:1px solid #eaeaea;display:flex;justify-content:space-between;color:#68706a;font-size:12px}.login-footer span{margin-left:24px}
@media(max-width:700px){.login-top{padding:24px}.login-label{max-width:110px;text-align:right}.login-main{display:block;width:auto;margin:38px 24px 48px}.login-intro h1{font-size:38px}.login-intro .intro{font-size:16px}.login-topics{margin:28px 0 36px}.login-panel{padding:26px}.login-footer{display:block;padding:22px 24px}.login-footer span{display:block;margin:8px 0 0}.account-actions{gap:12px}}

.login-main{padding:0;gap:48px;align-items:start}

/* Learning diagrams explain steps and decisions without external assets. */
.language-switch{display:flex;gap:2px;padding:3px;border:1px solid #d8ded2;border-radius:5px;flex-shrink:0}.language-switch button{background:transparent;border:0;border-radius:3px;color:#66715f;padding:5px 9px;font-size:12px;font-weight:500}.language-switch button[aria-pressed="true"]{background:#e4ebdd;color:#30432a}.topbar{gap:15px;flex-wrap:wrap;height:auto;min-height:78px;padding-top:14px;padding-bottom:14px}.topbar>span:first-child{margin-right:auto}.course-draft{font-size:12px;color:#68785d;border-left:2px solid #b6c6a8;padding-left:12px}.learning-objectives{padding:24px 0 12px;border-top:1px solid #e7e8e2}.learning-objectives h2{margin:0}.learning-objectives li{font-size:15px;line-height:1.7;margin-bottom:7px}.learning-graphic{margin:28px 0 38px;background:#f2f5ed;border:1px solid #e0e7d7;border-radius:7px;padding:27px 24px;overflow:hidden}.learning-graphic h2{margin:0 0 25px;font-size:20px}.diagram-steps{padding:0!important;margin:0!important;list-style:none;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}.diagram-steps li{position:relative;min-width:0;line-height:1.5!important}.diagram-steps li:not(:last-child):after{content:'→';position:absolute;right:-18px;top:8px;color:#789066;font-size:22px}.diagram-node{display:flex;align-items:center;justify-content:center;width:40px;height:40px;background:#dfe9d3;border:1px solid #bdcdad;border-radius:50%;font-size:12px;font-weight:700;color:#4e6540;margin-bottom:13px}.diagram-steps h3{font-size:15px;margin-bottom:8px}.diagram-steps p{font-size:13px!important;line-height:1.65!important;margin:0;color:#59674f}.learning-graphic figcaption{font-size:12px;color:#5b6e4f;margin-top:23px;padding-top:16px;border-top:1px solid #d7e1cc}.learning-graphic.compare .diagram-steps{grid-template-columns:repeat(2,minmax(0,1fr));gap:0}.compare .diagram-steps li{padding:0 20px;border-left:2px solid #b4c5a2}.compare .diagram-steps li:first-child{padding-left:0;border-left:0}.compare .diagram-steps li:after{display:none}.compare .diagram-node{border-radius:3px;width:31px;height:8px;color:transparent;background:#9dad8e;border:0}.compare .diagram-steps li:nth-child(2) .diagram-node{background:#d1bda0}.cycle .diagram-steps{border:1px dashed #a9bc95;border-radius:14px;padding:20px!important}.cycle .diagram-node{background:#fff}.cycle-return{font-size:24px;line-height:1;vertical-align:middle}.scenario,.self-check{border-top:1px solid #dfe4d7;margin:34px 0;padding:27px 0 10px}.scenario>.eyebrow,.self-check>.eyebrow{margin-bottom:15px}.scenario details,.self-check details{margin-top:18px;border:1px solid #dde3d4;border-radius:5px;padding:16px 19px;background:#f7f8f4}.scenario summary,.self-check summary{cursor:pointer;font-weight:600;font-size:14px;color:#455c37}.scenario details[open] summary,.self-check details[open] summary{margin-bottom:17px}.scenario details p,.self-check details p{margin-bottom:12px}.scenario h3{margin-top:18px}.self-check h2{font-size:21px}.course-photo{margin:25px 0 28px;display:grid;grid-template-columns:200px 1fr;gap:23px;align-items:center;border-top:1px solid #e7e8e2;border-bottom:1px solid #e7e8e2;padding:17px 0}.course-photo img{width:200px;height:110px;object-fit:cover;border-radius:3px}.course-photo figcaption{color:#69745f;font-size:14px;max-width:330px}.lesson-photo{margin:30px 0}.lesson-photo img{width:100%;max-height:230px;object-fit:cover;border-radius:5px}.lesson-photo figcaption{font-size:12px;color:#66745e;margin-top:10px}html[lang="zh-CN"]{font-family:"Microsoft YaHei","PingFang SC","Segoe UI",sans-serif}html[lang="zh-CN"] h1{letter-spacing:-.04em;font-size:43px;line-height:1.3}html[lang="zh-CN"] .eyebrow{letter-spacing:.08em}html[lang="zh-CN"] .lesson-body p,html[lang="zh-CN"] .lesson-body li{line-height:1.95}html[lang="zh-CN"] .rail nav a{font-size:14px}.lesson-body,.quiz-sidebar,.question-panel{min-width:0;overflow-wrap:anywhere}.login-top{gap:20px;flex-wrap:wrap}.login-top .login-label{margin-left:auto}
@media(max-width:1100px){.diagram-steps{grid-template-columns:1fr}.diagram-steps li{display:flex;gap:16px;align-items:flex-start;padding-bottom:17px}.diagram-node{flex-shrink:0;margin-bottom:0}.diagram-steps li:not(:last-child):after{content:'↓';left:13px;right:auto;top:auto;bottom:-14px;font-size:20px}.compare .diagram-steps li{display:block;padding:0 15px}.compare .diagram-node{margin-bottom:15px}.cycle .diagram-steps{gap:23px}}
@media(max-width:520px){.topbar{gap:10px;min-height:78px}.topbar>span:first-child{width:100%;font-size:10px}.topbar .account-actions{margin-right:auto}.language-switch button{font-size:11px;padding:4px 7px}.learning-graphic{padding:22px 17px;margin:25px 0}.learning-graphic.compare .diagram-steps{grid-template-columns:1fr;gap:22px}.compare .diagram-steps li{padding:0 0 0 13px!important;border-left:2px solid #b4c5a2!important}.compare .diagram-node{width:45px}.course-photo{grid-template-columns:106px 1fr;gap:15px}.course-photo img{width:106px;height:95px}.course-photo figcaption{font-size:12px}.lesson-photo img{max-height:170px}html[lang="zh-CN"] h1{font-size:32px}.login-top .language-switch{margin-left:auto}.login-top .login-label{font-size:11px;max-width:none}.login-top .brand{flex-grow:1}.question-map{gap:6px}}

main:focus{outline:none}
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nav a[hidden]{display:none}
@media(max-width:800px){.admin-rule-fields,.admin-filters{grid-template-columns:1fr}.admin-metrics{grid-template-columns:repeat(2,1fr)}.admin-month-head{align-items:start;flex-direction:column;gap:12px}.admin-plan{padding:22px 17px}.admin-plan #admin-reload{display:block;margin-left:0;margin-top:12px}.monthly-assignment{padding:20px 17px}.monthly-assignment>a.small{display:block;margin-top:15px}}
.practice-modes{display:flex;gap:25px;border-bottom:1px solid var(--line);margin:0 0 30px;flex-wrap:wrap}.practice-modes a{padding:8px 0 12px;color:var(--muted);text-decoration:none;font-size:14px;border-bottom:2px solid transparent}.practice-modes a[aria-current=page]{color:#283b28;border-color:#718663;font-weight:600}.test-setup{max-width:780px;background:#f1f4ec;border:1px solid #e0e6d9;border-radius:6px;padding:28px}.test-fields{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-top:21px}.test-fields label,.test-history-head label{display:block;font-size:13px;font-weight:600;margin-bottom:7px}.test-fields input,.test-history-head input{font:inherit;color:inherit;background:white;border:1px solid #cfd6c8;border-radius:5px;padding:10px 12px;width:100%;min-width:0}.test-fields .small{margin:7px 0 5px}.coverage-preview{font-size:15px;font-weight:600;margin:17px 0 9px}.test-setup form>.error{margin:12px 0}.test-context{display:flex;flex-direction:column;gap:7px;border-left:2px solid #adbea0;padding:5px 0 5px 18px;margin:23px 0 30px;font-size:14px;line-height:1.8}.test-draft-row{display:flex;justify-content:space-between;gap:25px;align-items:center;border-bottom:1px solid var(--line);padding:19px 0}.test-draft-row p{font-size:13px;margin:5px 0}.test-history-head{display:flex;justify-content:space-between;gap:25px;align-items:flex-start}.test-history-head>div:last-child{max-width:220px}.test-exports{display:flex;gap:24px;align-items:center;flex-wrap:wrap;margin:20px 0}.test-exports .button{font-size:13px}.test-history-table{min-width:830px;width:100%;border-collapse:collapse;text-align:left;font-size:13px}.test-history-table td,.test-history-table th{padding:14px 12px;vertical-align:top;border-bottom:1px solid var(--line)}.test-history-table th{font-size:12px;font-weight:600;background:#f2f4ee}.test-history-table td:first-child{min-width:135px}.test-history-table td:nth-child(2){min-width:80px}.test-feedback{border-top:1px solid var(--line);padding:22px 0}.test-feedback summary{cursor:pointer;list-style:disclosure-closed;padding-left:4px}.test-feedback[open] summary{list-style:disclosure-open}.test-feedback summary>.tag{margin:0 0 10px}.test-feedback summary>span:last-child{display:block;font-weight:500;line-height:1.7;font-size:16px}.test-feedback.revisit .tag{background:#f3eee2;color:#735e30}.test-objective-details,.audit-details{border-top:1px solid var(--line);padding:20px 0;margin-top:25px}.test-objective-details summary,.audit-details summary{cursor:pointer;font-weight:600}.audit-details dl{display:grid;grid-template-columns:145px minmax(0,1fr);gap:9px 18px;font-size:13px;margin:20px 0;overflow-wrap:anywhere}.audit-details dt{color:var(--muted)}.audit-details dd{margin:0}.test-fields input:focus-visible,.test-history-head input:focus-visible,.test-feedback summary:focus-visible,.audit-details summary:focus-visible,.test-objective-details summary:focus-visible{outline:3px solid #657c58;outline-offset:4px}
@media(max-width:650px){.test-fields{grid-template-columns:1fr;gap:15px}.test-setup{padding:22px 17px}.test-history-head,.test-draft-row{display:block}.test-history-head>div:last-child{max-width:none;margin-top:20px}.test-draft-row .button{margin-top:12px}.test-exports{gap:15px}.audit-details dl{grid-template-columns:1fr;gap:3px}.audit-details dd{margin-bottom:12px}.practice-modes{gap:20px}}
.bank-stats{display:flex;gap:32px;flex-wrap:wrap;margin:24px 0}.bank-stats strong{font-size:25px;font-weight:500;margin-right:5px}.bank-filters{display:grid;grid-template-columns:1fr 1.25fr 1fr;gap:16px;margin:32px 0 18px}.bank-filters label{display:grid;gap:7px;font-size:12px;font-weight:600;min-width:0}.bank-filters input,.bank-filters select{font:inherit;font-size:14px;background:#fff;color:inherit;border:1px solid #d9dcd3;border-radius:5px;padding:11px;width:100%;min-width:0}.bank-chapter{margin:30px 0 44px;border-top:1px solid var(--line);padding-top:24px}.bank-chapter-head{display:flex;justify-content:space-between;gap:20px;align-items:center;margin-bottom:18px}.bank-chapter-head>div{max-width:68%}.bank-chapter-head .eyebrow{margin-bottom:8px}.bank-chapter-head h2{margin:0}.bank-chapter-head .button{font-size:12px;flex-shrink:0}.bank-question{padding:17px 0;border-bottom:1px solid var(--line)}.bank-question summary{cursor:pointer;list-style:disclosure-closed;padding-left:4px}.bank-question[open] summary{list-style:disclosure-open}.bank-question summary>span{display:block}.bank-question summary>.small{margin-bottom:7px;font-size:11px}.bank-question summary>span:last-child{font-size:16px;line-height:1.65;font-weight:500}.bank-options{padding-left:27px}.bank-options li{padding:6px 0 6px 6px;line-height:1.7}.question-mapping{border-left:2px solid #b5c3a8;padding:2px 0 2px 15px;margin:24px 0}.question-mapping p{margin:3px 0;font-size:13px;line-height:1.65}.bank-feedback{padding:25px 0}.bank-feedback>.tag{margin-bottom:13px}.bank-feedback.revisit>.tag{background:#f3eee2;color:#735e30}.answer-explanation{background:#f0f3ea;padding:19px 23px;border-radius:5px;margin-top:18px}.answer-explanation h4{margin:0 0 12px;font-size:15px}.answer-explanation p{line-height:1.8}.bank-result-heading{margin-top:38px}.bank-version{margin-top:24px}.bank-filters select:focus-visible,.bank-question summary:focus-visible{outline:3px solid #657c58;outline-offset:4px}
@media(max-width:850px){.bank-filters{grid-template-columns:1fr}.bank-chapter-head{display:block}.bank-chapter-head>div{max-width:100%;margin-bottom:15px}.bank-stats{gap:16px}.bank-stats strong{font-size:22px}.answer-explanation{padding:16px}.question-mapping{padding-left:11px}}
@media (max-width: 1100px) { .lesson-layout { grid-template-columns: 1fr; } .lesson-nav { display: none; } }
.learning-tracks{display:flex;gap:25px;border-bottom:1px solid var(--line);margin:23px 0 26px;flex-wrap:wrap}.learning-tracks a{padding:9px 0 13px;color:var(--muted);text-decoration:none;font-size:14px;border-bottom:2px solid transparent}.learning-tracks a[aria-current=page]{color:#283b28;border-color:#718663;font-weight:600}.learning-tracks a span{font-size:11px;font-weight:500;padding:3px 6px;background:#eef1e8;border-radius:3px;margin-left:5px;color:#58664e}.learning-tracks a:focus-visible{outline:3px solid #657c58;outline-offset:4px}.extension-note{font-size:13px;line-height:1.8;background:#f2f4ee;border-left:2px solid #9cad8e;padding:14px 18px;margin:22px 0 28px}.extension-note strong{display:block;margin-bottom:3px}.extension-principle{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:35px;border-block:1px solid var(--line);padding:28px 0;margin:0 0 35px}.extension-principle h2{margin-top:8px}.extension-principle p:last-child{font-size:14px;line-height:1.85;color:var(--muted);margin-bottom:0}.extension-habit{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;justify-content:center}.extension-habit li{display:flex;gap:17px;align-items:center;padding:14px 0;border-bottom:1px solid var(--line);font-size:13px}.extension-habit li:last-child{border-bottom:0}.extension-habit strong{font-size:12px;color:#617054}.extension-privacy{line-height:1.9;margin-top:24px}.extension-list .chapter-row{align-items:center}.extension-list .row-meta{white-space:nowrap}.extension-list .number{font-size:12px}.extension-nav a[aria-current=page]{font-weight:600}
@media(max-width:850px){.extension-principle{grid-template-columns:1fr;gap:15px}.extension-habit{max-width:100%}.learning-tracks{gap:18px}.extension-list .chapter-row{column-gap:12px}.extension-note{padding:12px 14px}.extension-principle h2{font-size:23px}}
.learning-tracks a span{display:inline-block}
.ai-safety-case{border-block:1px solid var(--line);margin:32px 0;padding:25px 0}.ai-safety-case>h2{margin-top:10px}.ai-safety-case p{line-height:1.85}.ai-safety-case h3{font-size:15px;line-height:1.6;margin:0 0 9px}.ai-case-task{border-left:2px solid #829973;padding:5px 0 5px 17px;margin:23px 0;font-size:14px}.ai-case-task p{margin:6px 0}.ai-case-mail{background:#f3f5ef;border:1px solid #e2e6dc;border-radius:5px;padding:20px 23px}.ai-case-mail p:last-child{margin:0}.ai-mail-source{font-size:11px;color:var(--muted);text-transform:uppercase;letter-spacing:.08em;margin:0 0 16px}.ai-case-reveal{padding:19px 0;border-bottom:1px solid var(--line)}.ai-case-reveal>summary{cursor:pointer;font-weight:600;font-size:14px;line-height:1.6}.ai-case-untrusted{margin:19px 0 12px;padding:17px 20px;border-left:2px solid #aa8b63;background:#f6f1e8}.ai-case-untrusted h3{color:#725d3d}.ai-case-untrusted p:last-child{margin-bottom:0}.ai-case-response{padding:21px 0 0}.ai-case-response p{margin-bottom:0}.ai-case-reveal summary:focus-visible{outline:3px solid #657c58;outline-offset:5px}
@media(max-width:650px){.ai-case-mail,.ai-case-untrusted{padding:16px}.ai-case-task{padding-left:13px}.ai-safety-case{margin:26px 0}}