*{box-sizing:border-box} :root{--ink:#182b35;--muted:#71808b;--teal:#126456;--line:#e4e9e8;--bg:#f5f7f8;--mint:#dcf2e8}body{margin:0;background:var(--bg);color:var(--ink);font:15px/1.6 'Segoe UI',Tahoma,Arial,sans-serif}a{color:var(--teal);text-decoration:none}button,input,select,textarea{font:inherit}button,a,input,select,summary{touch-action:manipulation}a:hover{text-decoration:underline}button{cursor:pointer}h1,h2,h3,p{margin-top:0}h1{font-size:32px;line-height:1.25;letter-spacing:-1px;margin-bottom:8px}h2{font-size:23px;letter-spacing:-.4px;line-height:1.35}h3{font-size:17px;line-height:1.4}p{color:var(--muted)}.sidebar{width:245px;position:fixed;inset-block:0;inset-inline-start:0;background:white;border-inline-end:1px solid var(--line);padding:32px 20px;display:flex;flex-direction:column;z-index:2}.brand{display:flex;align-items:center;gap:10px;margin:0 9px 48px;color:var(--ink);font-size:21px;letter-spacing:1.7px;font-weight:800;line-height:1.4}.brand:hover{text-decoration:none}.brand small{display:block;font-size:9px;font-weight:500;letter-spacing:2.3px}.brand-icon{display:grid;place-items:center;background:var(--teal);border-radius:12px 2px 12px 2px;color:white;font-size:29px;width:42px;height:44px;font-style:italic}.nav-caption{font-size:9px;font-weight:700;letter-spacing:1.7px;color:#97a3aa;margin:0 16px 13px}.sidebar nav{display:grid;gap:6px}.sidebar nav a{padding:12px 14px;border-radius:8px;font-size:13px;font-weight:600;color:#71808a;display:flex;align-items:center;gap:12px}.sidebar nav a:hover,.sidebar nav a.active{background:#e9f4ee;color:var(--teal);text-decoration:none}.nav-icon{font-size:21px;line-height:1;width:24px;text-align:center}.sidebar-bottom{margin-top:auto;padding:25px 14px 0;font-size:9px;letter-spacing:.5px;color:#8c9d97}.sidebar-bottom p{font-size:12px;line-height:1.6;color:#70857c;letter-spacing:0}.mini-road{font-size:37px;color:#bdd2c6;line-height:1.4}.local-dot{background:#4c997c;display:inline-block;width:6px;height:6px;border-radius:50%;margin-inline-end:5px}.shell{margin-inline-start:245px}.topbar{height:83px;display:flex;align-items:center;justify-content:space-between;padding:0 45px;background:white;border-bottom:1px solid var(--line);gap:18px}.breadcrumb{font-size:11px;color:#8a979e}.breadcrumb span{padding:0 12px;color:#c4ccce}.toolbar{display:flex;gap:13px;align-items:center;font-size:12px}.language select{border:0;background:transparent;color:#52616b;font-size:12px}.avatar{display:grid;place-items:center;border-radius:50%;width:30px;height:30px;background:#e8f1e9;color:#286956;font-weight:700}.username{max-width:100px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.toolbar form{margin:0}main{padding:34px 45px 60px;max-width:1530px;margin:auto;min-height:calc(100vh - 150px)}footer{padding:18px 45px;border-top:1px solid var(--line);font-size:11px;color:#8a969b}.page-heading{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-bottom:25px}.page-heading p{margin-bottom:0}.eyebrow{text-transform:uppercase;font-size:9px;font-weight:700;letter-spacing:1.8px;color:#8c9b9e;display:block;margin-bottom:9px}.pill{border:1px solid #d8e5df;background:#edf6f1;color:#5b8c75;font-size:8px;font-weight:600;letter-spacing:1px;padding:7px 10px;border-radius:20px;white-space:nowrap}.hero{border-radius:14px;min-height:300px;background:#154f44;color:white;position:relative;overflow:hidden;display:flex;box-shadow:0 7px 20px #1b46340c}.hero-copy{position:relative;z-index:1;padding:36px 38px;width:62%;max-width:620px}.hero .eyebrow{color:#a8c9b8}.hero h2{font-size:38px;letter-spacing:-1.5px;line-height:1.2;margin-bottom:15px;max-width:420px}.hero p{color:#bed5cc;font-size:13px;line-height:1.9;max-width:390px;margin-bottom:26px}.actions{display:flex;gap:22px;align-items:center;flex-wrap:wrap}.button{display:inline-flex;align-items:center;justify-content:center;gap:22px;border:1px solid var(--teal);background:var(--teal);color:white;padding:12px 20px;border-radius:7px;font-weight:600;font-size:13px;line-height:1.4;text-decoration:none}.button:hover{background:#0c5044;text-decoration:none}.button.light{background:#e3f2df;border-color:#e3f2df;color:#1b5c45}.button.light:hover{background:white}.button.small{font-size:11px;padding:8px 13px;gap:8px}.button.secondary{background:white;border-color:var(--line);color:var(--teal)}.hero-link{font-size:11px;color:#d0e3d8}.road-scene{position:absolute;inset-block:0;inset-inline-end:0;width:43%;overflow:hidden;background:linear-gradient(140deg,transparent,#2c7162)}.orb{position:absolute;border:1px solid #87b09922;border-radius:50%;width:360px;height:360px;left:10px;top:8px}.orb-two{width:270px;height:270px;left:55px;top:52px}.scene-label{position:absolute;top:24px;right:28px;border:1px solid #a4c6aa44;border-radius:6px;width:43px;height:43px;text-align:center;font-size:23px;font-weight:300;line-height:1.3}.scene-label span{display:block;font-size:7px;letter-spacing:2px}.road{position:absolute;width:180px;height:420px;top:-55px;left:98px;transform:rotate(31deg);background:#b7c5aa1c;border-inline:2px solid #aecba43b}.road:before,.road:after{content:'';position:absolute;width:1px;background:#a8c39d55;height:100%;left:14px}.road:after{left:auto;right:14px}.road-line{position:absolute;left:50%;height:100%;border-left:3px dashed #d3ddbc88}.car{position:absolute;top:200px;left:105px;width:37px;height:72px;border-radius:10px 10px 9px 9px;background:#dfebd5;box-shadow:7px 8px 12px #00190e70;border:3px solid #afc9a2}.car:before{content:'';position:absolute;left:3px;right:3px;top:16px;height:15px;background:#21574c;border-radius:5px 5px 2px 2px}.car:after{content:'';position:absolute;left:4px;right:4px;bottom:9px;height:10px;background:#376a59;border-radius:2px 2px 4px 4px}.sign{position:absolute;left:38px;top:138px;background:#f4f3d9;border:6px solid #bc6653;width:57px;height:57px;line-height:45px;text-align:center;border-radius:50%;color:#244d3b;font-size:22px;font-weight:700;transform:rotate(-8deg);box-shadow:3px 6px 10px #001f1430}.scene-caption{position:absolute;bottom:25px;right:27px;font-size:8px;line-height:1.8;letter-spacing:2px;color:#c9dcbc}.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin:22px 0 35px}.stats article{background:white;border:1px solid var(--line);border-radius:10px;display:flex;align-items:center;padding:22px;gap:17px;position:relative}.stat-icon{width:43px;height:43px;display:grid;place-items:center;border-radius:11px;background:#e9f0ed;color:#427963;font-size:25px}.stat-icon.green{background:#f1f3e5;color:#8d9d47}.stat-icon.violet{background:#efedf8;color:#8c7aa8}.stats strong{font-size:25px;font-weight:650;line-height:1.3}.stats small{font-size:15px;font-weight:400;color:#9aa6a6}.stats p{font-size:11px;margin:3px 0 0}.stat-note{margin-inline-start:auto;font-size:9px;color:#94a09a}.section-heading{display:flex;justify-content:space-between;align-items:center;margin-bottom:18px;gap:20px}.section-heading .eyebrow{font-size:8px;margin-bottom:5px}.section-heading h2{margin:0;font-size:22px}.section-heading>a{font-size:11px;font-weight:600}.module-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.module-card{border:1px solid var(--line);background:white;border-radius:10px;padding:23px 22px 0;color:var(--ink);display:flex;flex-direction:column;transition:transform .15s,border-color .15s}.module-card:hover{text-decoration:none;border-color:#9dbcae;transform:translateY(-3px)}.module-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}.module-icon{background:#f1f5ed;border-radius:9px;width:39px;height:39px;display:grid;place-items:center;font-size:23px;color:#668168}.module-number{font-size:11px;color:#b2bcbf;font-weight:600}.module-card h3{font-size:15px;margin-bottom:8px}.module-card p{font-size:11px;line-height:1.8;margin-bottom:20px}.module-bottom{border-top:1px solid #edf0ee;padding:13px 0;display:flex;justify-content:space-between;align-items:center;color:#50806a;font-size:10px;font-weight:600;margin-top:auto}.panel{background:white;border:1px solid var(--line);border-radius:11px;padding:27px}.auth-card{max-width:460px;margin:45px auto}.stack{display:flex;flex-direction:column;gap:17px}.stack>label:not(.answer){font-size:12px;font-weight:600;display:grid;gap:7px}input:not([type=radio]):not([type=hidden]),select,textarea{border:1px solid #d6dfdc;background:white;border-radius:6px;padding:11px 12px;color:var(--ink);max-width:100%}input:focus,select:focus,textarea:focus{outline:2px solid #7cac93;outline-offset:2px}.stack .button{align-self:flex-start}.stack small{color:var(--muted);font-size:11px}.auth-switch{display:block;margin-top:25px;font-size:12px}.alert{border-radius:8px;background:#e9f1eb;padding:17px 20px;color:#4a6c59;font-size:13px}.error{background:#fdf1ed;color:#9a4a38}.success{background:#edf7ee;color:#376a4b}.text-button{border:0;background:none;color:var(--teal);padding:5px;font-size:12px}.lesson-layout{display:grid;grid-template-columns:2fr 1fr;gap:24px}.lesson-facts article{display:flex;gap:20px;padding:19px 0;border-bottom:1px solid var(--line)}.lesson-facts article:first-child{padding-top:0}.lesson-facts article p{margin:0;color:#465a62}.fact-number{flex:0 0 30px;border-radius:50%;height:30px;background:#edf4ec;color:#5b846b;display:grid;place-items:center;font-size:12px}.source{display:flex;flex-direction:column;gap:7px;font-size:12px;margin-top:23px}.source small{color:#8c9a9c;font-size:10px}.lesson-cta{align-self:start}.lesson-cta .module-icon{margin-bottom:20px}.lesson-cta p{font-size:13px}.lesson-cta .button{margin-bottom:15px}.filters{display:flex;gap:15px;align-items:center;margin:0 0 22px;font-size:12px}.filters select{margin-inline-start:8px}.question-card{max-width:850px;margin:22px auto}.question-card h2{font-size:25px;margin:15px 0 27px}.answer{display:flex;gap:15px;align-items:center;padding:17px;border:1px solid var(--line);border-radius:7px;cursor:pointer;font-size:14px;color:#4a5b62}.answer:has(input:checked){background:#f0f7f0;border-color:#74a48c}.answer input{accent-color:var(--teal)}.answer-letter{width:27px;height:27px;display:grid;place-items:center;background:#f0f3f3;border-radius:5px;font-size:11px;flex-shrink:0}.answer-correct{background:#e9f5e9;border-color:#91bc99}.feedback{padding:20px;border-radius:8px;margin:22px 0}.feedback p{color:inherit;margin:10px 0}.feedback a{font-size:12px}.rule-grid,.region-options{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.rule-grid .panel p{font-size:13px}.rule-score{font-size:45px;color:var(--teal);line-height:1.4}.rule-score small{font-size:20px;color:#a2b0a5}.region-option{cursor:pointer}.region-option:has(input:checked){border-color:#498768;background:#f2f8f1}.region-option input{accent-color:var(--teal)}.region-option h3{margin-top:10px}.region-option p{font-size:12px;margin:0}.muted{font-size:12px;margin:20px 0;color:var(--muted)}.timer{border:1px solid #dbe5d7;background:#edf5e9;border-radius:10px;padding:10px 20px;text-align:center}.timer strong{font-size:30px;line-height:1.2;display:block;color:var(--teal)}.timer small{font-size:9px;color:#719079}progress{width:100%;height:7px;accent-color:var(--teal);border:0;border-radius:10px;overflow:hidden}progress::-webkit-progress-bar{background:#e1e9e2}progress::-webkit-progress-value{background:var(--teal)}.result-hero{display:flex;align-items:center;gap:35px;margin-bottom:30px}.result-score{font-size:75px;font-weight:700;line-height:1.3;letter-spacing:-4px}.result-score small{font-size:27px;letter-spacing:-1px;font-weight:400}.result-hero h2{margin-bottom:8px}.result-hero p{font-size:12px}.review-list{display:grid;gap:12px}.review-list .panel{padding:17px 22px}.review-list summary{display:flex;gap:15px;justify-content:space-between;cursor:pointer;font-size:13px}.review-list p{font-size:13px;margin:15px 0 0}.review-list a{font-size:11px}.good{color:#3f8561}.bad{color:#b76651}.table-wrap{overflow:auto;padding:0}table{border-collapse:collapse;width:100%;text-align:start;font-size:12px}th,td{padding:16px 20px;border-bottom:1px solid var(--line);text-align:start}th{color:#8b999e;font-weight:600;background:#fafbfa}.badge{font-size:10px;background:#f3f5ef;border-radius:20px;padding:5px 10px}.empty{display:grid;justify-items:center;gap:25px;padding:50px;color:var(--muted)}.back{display:inline-block;margin-bottom:20px;font-size:12px}.admin-lessons{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;font-size:12px;margin-bottom:30px}.role-form{display:flex;align-items:center;gap:15px;margin:10px 0;font-size:12px}.role-form span{margin-inline-end:auto}.json-editor{width:100%;height:600px;font-family:Consolas,monospace;font-size:13px;direction:ltr;text-align:left}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}[dir=rtl] .hero-copy{text-align:right}[dir=rtl] .hero h2{letter-spacing:0}[dir=rtl] .eyebrow{letter-spacing:0}[dir=rtl] .hero .actions{gap:14px}[dir=rtl] .road-scene{transform:scaleX(-1)}
@media(min-width:1550px){.hero{min-height:350px}.hero-copy{padding:45px}.hero h2{font-size:45px}.road-scene{width:45%}.road{left:170px}.sign{left:90px;top:155px}.module-card{min-height:225px}}@media(max-width:1100px){.sidebar{width:210px;padding-inline:12px}.shell{margin-inline-start:210px}.topbar{padding:0 25px}main{padding:28px 25px 45px}.hero-copy{padding:30px;width:68%}.hero h2{font-size:32px}.hero .actions{gap:15px}.hero-link{font-size:10px}.hero p{max-width:320px}.road-scene{width:35%;opacity:.7}.stats article{padding:17px;gap:12px}.stat-note{display:none}.module-card{padding:18px 17px 0}.rule-grid,.region-options{gap:13px}.rule-grid .panel{padding:20px}.breadcrumb{display:none}}@media(max-width:800px){.sidebar{position:relative;width:100%;padding:18px;border:0}.brand{margin:0 0 15px}.sidebar nav{display:flex;overflow:auto;gap:5px}.sidebar nav a{white-space:nowrap;padding:8px 10px;font-size:11px;gap:6px}.nav-caption,.sidebar-bottom{display:none}.shell{margin:0}.topbar{height:65px;justify-content:flex-end;padding:0 20px}.toolbar{gap:10px}.username{display:none}main{padding:25px 20px 40px}.hero{min-height:290px}.hero-copy{width:75%;padding:28px}.hero h2{font-size:32px;max-width:300px}.hero p{max-width:280px}.road-scene{width:30%;opacity:.45}.stats{gap:10px}.stats article{padding:15px;gap:10px}.stat-icon{width:32px;height:32px;font-size:21px}.stats strong{font-size:21px}.stats p{font-size:9px}.module-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.lesson-layout{grid-template-columns:1fr}.rule-grid,.region-options{grid-template-columns:1fr}.page-heading h1{font-size:27px}.pill{display:none}.admin-lessons{grid-template-columns:1fr 1fr}footer{padding:20px;font-size:10px}.question-card{padding:22px}.question-card h2{font-size:21px}}@media(max-width:480px){.hero-copy{width:100%;padding:25px}.hero h2{font-size:30px;max-width:260px}.hero p{max-width:240px}.road-scene{opacity:.18;width:50%}.hero-link{color:#e0ede6}.hero .actions{gap:18px}.stats{grid-template-columns:1fr;gap:8px;margin:15px 0 28px}.stats article{padding:12px 18px}.stats article>div{display:flex;align-items:center;gap:15px}.stats p{font-size:11px}.module-grid{gap:12px}.module-card{padding:16px 14px 0}.module-card h3{font-size:13px}.module-card p{font-size:10px}.section-heading{align-items:flex-end}.section-heading h2{font-size:19px}.section-heading>a{font-size:10px;max-width:100px;text-align:end}.toolbar .button{font-size:10px}.result-hero{gap:20px;flex-direction:column;align-items:flex-start}.result-score{font-size:65px}.answer{padding:12px;font-size:13px;gap:10px}.answer-letter{display:none}.role-form{flex-wrap:wrap}.page-heading{gap:10px}.timer{padding:8px 12px}.timer strong{font-size:24px}.admin-lessons{grid-template-columns:1fr}}
.practical-guides{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:15px;margin:20px 0 32px}.practical-guides summary{display:flex;justify-content:space-between;gap:15px;cursor:pointer}.practical-guides li{padding:7px 0;color:#53686d;font-size:13px}.skill-grid{display:grid;grid-template-columns:1fr 1fr;gap:13px}.skill-option{display:flex;align-items:flex-start;gap:12px;border:1px solid var(--line);border-radius:8px;padding:14px;font-size:13px}.skill-option input{margin-top:5px;accent-color:var(--teal)}.skill-option:has(input:checked){background:#edf6ee;border-color:#8caf98}.training-heading{margin-top:32px}.training-notes{white-space:pre-wrap;overflow-wrap:anywhere}.review-list li{font-size:13px;color:#52676c;margin:8px 0}@media(max-width:800px){.practical-guides,.skill-grid{grid-template-columns:1fr}.review-list summary{flex-wrap:wrap}}

/* Original local learning illustrations; traffic geometry stays LTR even in Arabic. */
.learning-visual{margin:20px 0 24px;border:1px solid #d5e3e4;border-radius:14px;overflow:hidden;background:#edf4f1}
.learning-visual img{display:block;width:100%;height:auto;aspect-ratio:9/5;object-fit:contain;direction:ltr}
.learning-visual figcaption{display:grid;gap:5px;padding:12px 16px;background:#f6faf8;font-size:12px;line-height:1.6;color:#60777b}
.learning-visual figcaption strong{font-size:13px;color:#254f59}
.learning-visual-compact{margin:15px 0;border-radius:10px}
.fact-content{min-width:0;flex:1}.fact-content .learning-visual{margin-bottom:0}
.question-card .learning-visual{max-width:640px;margin-inline:auto}
.review-list .learning-visual{max-width:640px}
@media(max-width:600px){.learning-visual figcaption{padding:10px 12px;font-size:11px}.lesson-facts article{gap:10px}.learning-visual{border-radius:10px}}

.lesson-examples{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px;margin-top:24px}.lesson-examples h3{line-height:1.7}.lesson-examples li{padding:7px 0;font-size:14px;line-height:1.8}.example-solution{border-top:1px solid #dbe7e3;padding-top:15px}.example-solution summary{cursor:pointer;color:#17685d;font-weight:600}.timing-settings{margin-bottom:24px}.timing-settings label{display:block;margin-bottom:10px}.timing-settings input{max-width:160px}.timing-settings p{font-size:13px}@media(max-width:850px){.lesson-examples{grid-template-columns:1fr}}

.custom-mode{display:block;max-width:300px;font-size:11px;color:#60777b;line-height:1.5;margin-top:6px}

.advanced-topic{padding-bottom:25px;margin-bottom:15px;border-bottom:2px solid #d6e6df}.advanced-topic p{line-height:1.95;font-size:15px}.advanced-topic a{display:inline-block;margin-top:12px;font-size:12px}

.sign-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.sign-card{display:flex;flex-direction:column;gap:12px;min-width:0}.sign-images{display:flex;gap:12px;align-items:center;justify-content:center;flex-wrap:wrap;background:#fff;padding:18px;border-radius:10px;min-height:155px;direction:ltr}.sign-images img{display:block;max-width:100%;width:auto;height:auto;max-height:155px;object-fit:contain}.sign-images a{max-width:100%}.sign-card h2{font-size:19px;line-height:1.7;margin:0}.sign-card p{font-size:13px;line-height:1.85;margin:0}.sign-card details{border-top:1px solid #dbe6df;padding-top:12px;font-size:12px}.sign-card details p{padding:10px 0;font-size:12px}.sign-card .actions{margin-top:auto;flex-wrap:wrap;font-size:11px;gap:10px}.sign-card small{font-size:10px;color:#7c9092}.sign-code{font-size:19px;color:#1a6258}.sign-filters{flex-wrap:wrap;align-items:end}.sign-filters label{display:grid;gap:6px}.sign-filters input{min-width:180px}.law-index{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.law-index a{display:grid;gap:12px;font-size:13px}.law-index span{color:#587078;line-height:1.6}.law-index small{color:#18665b}.law-reader{max-width:980px;margin:15px auto 30px}.law-reader p{line-height:1.9;font-size:15px;margin:15px 0}.law-future{margin-bottom:25px;border-inline-start:4px solid #d2ad63}.law-future h2{margin:0}.law-future p{font-size:13px}.law-future a{font-size:12px}.legal-entry{margin-bottom:25px}.learning-visual img[src*="/signs/"]{max-height:320px;padding:25px;background:#fff;box-sizing:border-box}.sidebar{overflow-y:auto}@media(max-width:1100px){.sign-grid,.law-index{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:650px){.sign-grid,.law-index{grid-template-columns:1fr}.sign-filters{display:grid}.sign-filters input{width:100%}}
/* Practical-life learning and contextual support, desktop and small screens. */
.learning-video{display:block;width:100%;max-height:480px;background:#12292f;border-radius:12px}.lesson-steps{line-height:1.9;padding-inline-start:25px}.lesson-steps li{margin-bottom:24px}.life-card{color:inherit;text-decoration:none}.life-scene{width:100%;max-height:320px;object-fit:contain}.disc-demo{display:flex;gap:25px;align-items:center;justify-content:center;background:#2463a3;color:white;max-width:300px;padding:25px;border-radius:20px;font-size:28px;margin:18px 0}#accident-sketch{display:block;max-width:100%;height:auto;border:2px solid #527577;border-radius:10px;touch-action:none}.promo-dialog{max-width:520px;width:calc(100% - 40px);border:1px solid #a4b9ab;border-radius:16px;padding:28px;color:#163e3c}.promo-dialog::backdrop{background:#102a2abb}.promo-dialog [data-close-promo]{float:inline-end;margin:0 0 15px 15px}@media print{.sidebar,.topbar,footer,.actions,button{display:none!important}.shell{margin:0!important}}
.bench-grid{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(240px,1fr);gap:28px;align-items:start}.bench-diagram,.distance-diagram,.engine-diagram{width:100%;height:auto;max-height:350px}.bench-controls{display:grid;gap:14px}.bench-controls label{display:grid;gap:7px}.bench-controls input[type=range]{width:100%;accent-color:#24776d}.lab-tabs{display:flex;gap:9px;flex-wrap:wrap;margin:22px 0}.lab-tabs [aria-selected=true],.engine-stages [aria-pressed=true]{background:#195b51;color:white}.lab-readings{display:flex;justify-content:space-around;gap:15px;padding:18px}.engine-stages{display:grid;gap:12px}.lesson-checks fieldset{border:0;border-bottom:1px solid #d7e1dc;margin:0 0 25px;padding:0 0 25px}.lesson-checks legend{font-size:1.15rem;font-weight:700;margin-bottom:16px}.learning-lab-entry{margin-bottom:26px}.lesson-checks .option{display:flex;align-items:center;gap:12px;padding:14px}.lesson-checks input[type=radio]{flex:0 0 auto;width:auto}.lab-panel[hidden]{display:none!important}.video-chapters{margin:15px 0}@media(max-width:760px){.bench-grid{grid-template-columns:1fr}.lab-tabs button{flex:1 1 40%}.bench-controls{min-width:0}}
.lab-tabs button,.engine-stages button,.bench-controls button:not(.button),.video-chapters button{font:inherit;border:1px solid #b9ccc3;border-radius:9px;background:#f7faf6;color:#234c47;padding:10px 14px;cursor:pointer}.lab-tabs button[aria-selected=true],.engine-stages button[aria-pressed=true]{background:#195b51;color:#fff}.lab-tabs button:focus-visible,.engine-stages button:focus-visible{outline:3px solid #e4c875;outline-offset:2px}
.sign-study-layout{display:grid;grid-template-columns:minmax(250px,1fr) minmax(300px,1.5fr);gap:22px;margin:20px 0}.sign-study-layout .sign-images{min-height:180px}.sign-study-layout .sign-images img{max-height:200px}.study-steps{padding-inline-start:24px;line-height:1.9}.study-steps li{padding:10px 5px;border-bottom:1px solid #e3e9e4}.applied-sign-case{margin:18px 0}.applied-sign-case summary{cursor:pointer;color:#1d6750;font-weight:600}.sign-study-layout .actions{flex-wrap:wrap}@media(max-width:760px){.sign-study-layout{grid-template-columns:1fr}}

.signbook-3d{display:grid;gap:14px;max-width:1000px;min-width:0}.signbook-3d #sign-view{display:block;width:100%;height:420px;background:#c8dce1;border-radius:14px}.signbook-3d select{width:100%;min-width:0}