:root{font-family:ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:#153459;background:#f4f7fb;font-synthesis:none;--accent:#303f9f;--accent-hover:#26347e;--ink:#153459;--muted:#64748b;--line:#dfe6f0;--green:#e6efff;--side:242px}*{box-sizing:border-box}body{margin:0}button,input{font:inherit}button,a{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:default}a{color:inherit}button:focus-visible,a:focus-visible,input:focus-visible{outline:3px solid #4289c1;outline-offset:4px}button{border:0}svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.65;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0}.sidebar{position:fixed;inset:0 auto 0 0;width:var(--side);background:#fff;border-right:1px solid var(--line);display:flex;flex-direction:column;padding:30px 18px 22px;z-index:15}.brand{display:flex;align-items:center;gap:11px;padding:0 10px 35px;font-size:24px;letter-spacing:-1px;font-weight:750;text-decoration:none;background:none;color:var(--ink);text-align:left}.brand-mark{background:#26362e;color:#c9e1a6;border-radius:10px;padding:9px;display:flex}.brand-mark svg{width:24px;height:24px}.brand span small{font-size:12px;letter-spacing:2px;color:#768077;display:block;font-weight:550;margin-top:3px}.nav-button{display:flex;align-items:center;gap:11px;min-height:46px;width:100%;border-radius:8px;padding:11px 13px;background:transparent;text-align:left;font-size:14px;color:#526581}.nav-button:hover{background:#f0f4fc;color:#223a6b}.nav-button.active{background:#eaf0fb;color:#233d80;font-weight:650}.nav-button.active:before{content:"";height:19px;width:3px;border-radius:2px;background:#303f9f;position:absolute;left:18px}.side-rule{height:1px;background:var(--line);margin:22px 10px}.eyebrow{font-size:12px;font-weight:650;letter-spacing:1.5px;color:#778087;text-transform:uppercase}.sidebar .eyebrow{padding:0 13px;margin:5px 0 12px}.current-course{padding:13px;margin:0 0 13px;border:1px solid var(--line);border-radius:9px;display:flex;align-items:center;gap:10px}.flag{display:inline-block;width:20px;height:14px;background:linear-gradient(#fff 50%,#d95154 50%);border:1px solid #d9dddd;border-radius:2px;flex-shrink:0}.current-course strong{font-size:14px;display:block;margin-bottom:4px}.current-course small{font-size:12px;color:var(--muted)}.side-progress{margin-top:auto;padding:22px 13px}.progress-label{font-size:13px;color:var(--muted);display:flex;justify-content:space-between;gap:8px;margin-bottom:10px}.progress-label strong{color:#23477a;font-size:13px}.progress-track{height:4px;background:#e9eef7;border-radius:4px;overflow:hidden}.progress-fill{height:100%;background:#4289c1;border-radius:4px;transition:width .4s}.side-progress small{display:block;margin-top:10px;font-size:12px;line-height:1.6;color:#899097}.side-bottom{border-top:1px solid var(--line);padding-top:16px}.main{margin-left:var(--side);min-height:100vh}.topbar{height:74px;display:flex;align-items:center;justify-content:space-between;padding:0 34px;border-bottom:1px solid var(--line);background:#ffffff;gap:15px}.breadcrumb{font-size:13px;color:#7a858a;display:flex;align-items:center;gap:12px}.breadcrumb svg{width:14px;height:14px}.breadcrumb strong{font-weight:500;color:#26436a}.top-actions{display:flex;align-items:center;gap:18px}.demo-tag{font-size:12px;color:#6b7378;border:1px solid #dde2e4;border-radius:5px;padding:5px 9px;background:#fff}.language{font-size:12px;display:flex;align-items:center;gap:7px;font-weight:600;color:#5d676c}.language svg{width:16px;height:16px}.content{padding:29px 34px 22px;max-width:1800px;margin:auto}.course-heading{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:22px}.course-heading .eyebrow{margin-bottom:9px;color:#6c7b6b;display:flex;align-items:center;gap:8px;font-size:11px}h1{font-size:32px;line-height:1.15;letter-spacing:-1.1px;font-weight:680;margin:0 0 10px}h1 span{font-weight:380;color:#616d73}.course-heading p{font-size:14px;color:#748087;margin:0;display:flex;align-items:center;gap:9px}.heading-meta{font-size:13px;color:#7b8589;display:flex;align-items:center;gap:7px}.heading-meta svg{width:16px}.course-tabs{display:flex;align-items:center;gap:26px;border-bottom:1px solid #dbe3ef;margin-bottom:24px}.course-tab{display:flex;align-items:center;gap:9px;background:none;padding:12px 1px 16px;color:#62728b;font-size:14px;position:relative}.course-tab .tab-num{font-family:ui-monospace,SFMono-Regular,monospace;font-size:12px;border:1px solid #dbe1e3;border-radius:4px;padding:2px 5px}.course-tab.active{font-weight:650;color:#243985}.course-tab.active .tab-num{background:#e8edff;border-color:#e8edff;color:#303f9f}.course-tab.active:after{position:absolute;content:"";bottom:-1px;height:3px;left:0;right:0;background:#303f9f;border-radius:3px 3px 0 0}.workspace{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:20px;align-items:stretch}.viewer{height:540px;position:relative;overflow:hidden;isolation:isolate;border-radius:12px;background:radial-gradient(ellipse at 48% 37%,#304b70 0%,#1d3354 43%,#122440 100%);box-shadow:0 3px 12px #14221b14;color:white}.viewer canvas{width:100%;height:100%;display:block;outline-offset:-4px;touch-action:none}.viewer-header{position:absolute;top:20px;left:22px;right:20px;display:flex;justify-content:space-between;gap:12px;pointer-events:none;z-index:3}.viewer-title{font-family:ui-monospace,monospace;font-size:11px;letter-spacing:1.4px;color:#c0cdc3}.viewer-title small{display:block;margin-top:8px;letter-spacing:0;font-family:inherit;color:#84988d;font-size:11px}.viewer-tools{display:flex;gap:8px;pointer-events:auto}.icon-button{width:34px;height:34px;display:grid;place-items:center;background:#ffffff08;border:1px solid #ffffff1d;border-radius:7px;color:#d3ddd5}.icon-button:hover{background:#ffffff17}.icon-button svg{height:17px;width:17px}.viewer-ghost{position:absolute;font-family:ui-monospace,monospace;font-size:96px;font-weight:600;letter-spacing:-7px;color:#e0eed707;top:65px;left:25px;pointer-events:none;z-index:-1}.viewer-bottom{position:absolute;bottom:20px;left:20px;right:20px;display:flex;align-items:center;justify-content:space-between;gap:10px;z-index:4;pointer-events:none}.view-presets{display:flex;padding:4px;background:#111d19b5;border:1px solid #ffffff14;border-radius:8px;gap:2px;pointer-events:auto}.view-presets button{font-size:12px;padding:8px 10px;background:none;color:#9aaa9f;border-radius:5px}.view-presets button.active,.view-presets button:hover{background:#415044;color:#edf2e9}.labels-toggle{pointer-events:auto;display:flex;gap:7px;align-items:center;color:#ced8ce;font-size:12px;background:#18241cc9;border:1px solid #ffffff1a;border-radius:6px;padding:10px}.labels-toggle svg{width:14px;height:14px}.labels-toggle[aria-pressed=false]{color:#82938a}.viewer-hint{position:absolute;bottom:78px;left:24px;color:#85998b;font-size:11px;pointer-events:none;display:flex;gap:6px;align-items:center}.viewer-hint svg{width:14px;height:14px}.model-badge{position:absolute;left:23px;top:86px;font-size:11px;color:#cfdfbb;border:1px solid #8295704d;padding:5px 8px;border-radius:5px;background:#5263442e;z-index:3}.markers{position:absolute;inset:0;pointer-events:none;z-index:2}.marker{position:absolute;top:0;left:0;width:28px;height:28px;border-radius:50%;background:#f3f4ec;color:#26372b;border:1px solid #fff;box-shadow:0 0 0 5px #dcefc111,0 2px 6px #0005;font:600 11px ui-monospace,monospace;pointer-events:auto;transition:background .15s,box-shadow .15s}.marker.selected{background:#d4eaa9;color:#263b21;border-color:#e6f8c8;box-shadow:0 0 0 5px #c6e5a42b,0 2px 8px #0004}.marker:hover{box-shadow:0 0 0 7px #c6e5a445}.viewer .model-error{position:absolute;inset:140px 30px auto;text-align:center;color:#d4ded5;line-height:1.6;font-size:15px}.details{background:#fff;border:1px solid var(--line);border-radius:12px;padding:21px 19px;display:flex;flex-direction:column;min-height:540px}.panel-heading{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-bottom:14px}.panel-heading .eyebrow{font-size:10px;letter-spacing:1.3px}.count-chip{font-size:11px;color:#7b858b;background:#f1f5fa;border:1px solid #edf0f0;border-radius:4px;padding:3px 6px}.parts-list{display:flex;flex-direction:column;gap:4px}.part-button{min-height:38px;background:none;display:flex;align-items:center;gap:10px;text-align:left;padding:8px 9px;border-radius:6px;color:#697278;font-size:13px;width:100%;border:1px solid transparent}.part-button:hover{background:#f0f5fd}.part-button.active{background:#eaf1ff;border-color:#cfddf5;color:#244985;font-weight:550}.part-num{font:11px ui-monospace,monospace;color:#6c81a0;width:20px}.part-button.active .part-num{color:#3e65a2}.part-button svg{width:14px;height:14px;margin-left:auto;color:#7b936c}.part-detail{border-top:1px solid var(--line);margin-top:16px;padding-top:18px;flex:1}.detail-label{font:10px ui-monospace,monospace;letter-spacing:1px;color:#6482a6;text-transform:uppercase}.part-detail h2{font-size:20px;letter-spacing:-.5px;margin:8px 0 10px;font-weight:620}.part-detail p{font-size:14px;color:#5f718b;line-height:1.7;margin:0 0 17px}.detail-note{display:flex;align-items:flex-start;gap:9px;background:#eff5fc;color:#4e6480;padding:11px;border-radius:6px;font-size:12px;line-height:1.5}.detail-note svg{width:15px;height:15px;margin-top:1px}.mark-button{display:flex;align-items:center;justify-content:center;gap:8px;width:100%;font-size:12px;min-height:37px;background:#fff;border:1px solid #cfdaeb;border-radius:6px;color:#2c5787;margin-top:16px}.mark-button:hover{background:#eef4fd}.mark-button svg{width:14px;height:14px}.mark-button.learned{background:#edf4e5}.viewer-caption{font-size:12px;line-height:1.6;color:#86908e;display:flex;align-items:center;gap:7px;margin-top:12px}.viewer-caption svg{width:14px;height:14px}.course-footer{display:flex;justify-content:space-between;align-items:center;margin-top:22px;gap:20px;padding-top:20px;border-top:1px solid var(--line)}.footer-copy strong{display:block;font-weight:550;font-size:14px;margin-bottom:6px}.footer-copy p{margin:0;font-size:12px;color:#84908c}.primary,.secondary{min-height:43px;padding:11px 19px;display:inline-flex;align-items:center;justify-content:center;gap:10px;font-size:13px;border-radius:7px;font-weight:550}.primary{background:var(--accent);color:#fff;box-shadow:0 2px 3px #94302412}.primary:hover{background:var(--accent-hover)}.primary svg,.secondary svg{width:16px;height:16px}.secondary{background:#fff;border:1px solid var(--line);color:#425b7a}.secondary:hover{background:#edf3fc}.mobile-menu{display:none}.practice-eyebrow{color:#819275;letter-spacing:1.5px;font:11px ui-monospace,monospace;margin-bottom:20px}.task-title{font-size:23px;line-height:1.25;letter-spacing:-.5px;margin:0 0 14px}.task-description{font-size:14px;line-height:1.7;color:#61718a;margin-bottom:22px}.task-options{display:flex;flex-direction:column;gap:8px}.task-option{background:#f5f8fd;border:1px solid #dfe6f0;padding:12px;text-align:left;border-radius:7px;font-size:13px;color:#405a7b;display:flex;align-items:center;gap:9px}.task-option:hover{background:#e7effc}.feedback{margin-top:16px;border-radius:7px;padding:13px;font-size:13px;line-height:1.5;background:#eef5e6;color:#526c3c}.feedback.wrong{background:#fdf0eb;color:#a9573b}.feedback:empty{display:none}.task-next{margin-top:16px;width:100%}.task-tip{font-size:12px;line-height:1.7;color:#939b94;margin-top:auto;padding-top:18px;border-top:1px solid var(--line)}.practice-progress{display:flex;gap:5px;margin-bottom:20px}.practice-progress i{height:4px;border-radius:2px;background:#e6ebe2;flex:1}.practice-progress i.done{background:#86a466}.quiz-options .task-option{min-height:47px}.result-icon{width:54px;height:54px;border:1px solid #ccddbc;background:#edf4e4;border-radius:50%;display:grid;place-items:center;color:#617e49;margin:6px 0 22px}.result-icon svg{width:27px;height:27px}.result-number{font-size:48px;letter-spacing:-2px;font-weight:600;margin:6px 0 14px;color:#33472b}.result-number small{font-size:18px;color:#9ba494;letter-spacing:0}.result-actions{display:flex;flex-direction:column;gap:10px;margin-top:22px}.catalog{display:none}.catalog.visible{display:block}.course-view.hidden{display:none}.catalog-heading{margin:6px 0 30px}.catalog-heading h1{font-size:36px;margin:10px 0 13px}.catalog-heading p{color:#65758b;font-size:15px}.catalog-tools{display:flex;justify-content:space-between;align-items:center;gap:16px;margin-bottom:25px}.catalog-search{position:relative;flex:1;max-width:360px}.catalog-search input{width:100%;padding:13px 15px 13px 42px;border:1px solid #dce4ef;border-radius:8px;font-size:14px;background:#fff;outline-color:#88a371}.catalog-search svg{position:absolute;left:14px;top:13px;width:18px;height:18px;color:#9aa59d}.catalog-filters{display:flex;gap:7px;flex-wrap:wrap}.catalog-filter{padding:10px 14px;border:1px solid #dce4ef;border-radius:6px;background:#fff;font-size:13px;color:#53667f}.catalog-filter.active{color:#fff;background:#303f9f;border-color:#303f9f}.catalog-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:25px;max-width:1000px}.equipment-card{padding:0;text-align:left;border:1px solid #dce5f0;border-radius:12px;overflow:hidden;background:#fff;color:var(--ink)}.card-image{height:260px;background:radial-gradient(ellipse,#314664,#15233f);position:relative;overflow:hidden}.card-image img{width:100%;height:100%;object-fit:cover}.card-image .card-tag{position:absolute;top:18px;left:18px;background:#293c2de6;color:#d5e4c5;padding:5px 8px;font-size:11px;border:1px solid #7c916540;border-radius:4px}.card-body{padding:23px}.card-body h2{font-size:23px;letter-spacing:-.6px;margin:0 0 10px;font-weight:650}.card-body p{font-size:13px;color:#66768d;display:flex;gap:8px;align-items:center;margin:0 0 25px}.card-footer{display:flex;align-items:center;justify-content:space-between;border-top:1px solid var(--line);padding-top:17px;font-size:12px;color:#687a92}.card-footer strong{color:#303f9f;font-size:13px;display:flex;align-items:center;gap:8px}.catalog-empty{padding:65px 30px;max-width:1000px;text-align:center;border:1px dashed #cdd5c9;border-radius:10px;color:#808c7c}.catalog-empty h2{color:#495745;font-size:21px;font-weight:500}.catalog-note{display:flex;gap:12px;align-items:center;margin-top:27px;max-width:1000px;padding:18px 21px;border:1px solid #dce5f3;border-radius:8px;font-size:13px;color:#8a9584;background:#edf3fb}.catalog-note svg{color:#9dac94}.dialog{border:1px solid #dfe6f0;border-radius:15px;padding:30px;max-width:500px;width:calc(100% - 32px);box-shadow:0 25px 100px #0002;color:var(--ink)}.dialog::backdrop{background:#142546d0;backdrop-filter:blur(5px)}.dialog-header{display:flex;justify-content:space-between;gap:10px;align-items:center}.dialog h2{font-size:24px;letter-spacing:-.7px;margin:0}.dialog .icon-button{color:#788272;border-color:#dfe5da}.dialog p,.dialog li{font-size:15px;line-height:1.7;color:#61718a}.dialog ul{padding-left:20px}.dialog kbd{background:#f0f3ed;border:1px solid #dce4d6;border-radius:4px;padding:1px 6px;font-size:12px;color:#52684a}.dialog .primary{width:100%;margin-top:10px}.toast{position:fixed;bottom:24px;left:calc(50% + var(--side)/2);transform:translateX(-50%);background:#193459;color:#f0f6ff;border:1px solid #41639b;border-radius:9px;padding:13px 20px;font-size:13px;z-index:40;box-shadow:0 5px 25px #0002;display:none;max-width:80vw}.toast.visible{display:block}.viewer:fullscreen{height:100vh;width:100vw;border-radius:0}.viewer:fullscreen .viewer-bottom{bottom:25px}.viewer:fullscreen .viewer-header{top:25px}.viewer:fullscreen .model-badge{top:90px}.viewer:fullscreen .viewer-hint{bottom:86px}.quiz-answer-list{font-size:13px;line-height:1.8;color:#718067;padding-left:18px}button[hidden],div[hidden],section[hidden],p[hidden]{display:none!important}.kbd-hint{font-size:10px;color:#b2b9b3;display:block;line-height:1.5;margin-top:6px}
@media(min-width:1500px){.content{padding-top:38px}.workspace{grid-template-columns:minmax(0,1fr) 330px}.viewer{height:600px}.details{min-height:600px;padding:25px}.part-button{font-size:14px;min-height:42px}.part-detail p{font-size:15px}}
@media(max-width:1150px){:root{--side:190px}.sidebar{padding-left:12px;padding-right:12px}.brand{font-size:21px}.topbar{padding:0 24px}.content{padding:24px}.workspace{grid-template-columns:minmax(0,1fr) 260px;gap:14px}.details{padding:17px 14px}.viewer{height:530px}.details{min-height:530px}.viewer-bottom{left:12px;right:12px}.view-presets button{font-size:11px;padding:8px}.labels-toggle{font-size:0;gap:0}.labels-toggle svg{width:16px}.heading-meta{display:none}}
@media(max-width:950px){:root{--side:76px}.sidebar{align-items:center;padding:25px 10px 18px}.brand{padding:0 0 30px}.brand>span:last-child,.nav-button span,.sidebar .eyebrow,.current-course,.side-progress,.side-rule{display:none}.nav-button{width:48px;height:48px;justify-content:center;padding:12px;margin-bottom:7px}.nav-button.active:before{left:0}.side-bottom{margin-top:auto}.sidebar nav{margin-top:20px}.workspace{grid-template-columns:minmax(0,1fr) 270px}.topbar{height:64px}.course-heading h1{font-size:29px}.details{min-height:520px}.viewer{height:520px}.catalog-grid{grid-template-columns:1fr;max-width:600px}.catalog-tools{align-items:flex-start;flex-direction:column}.catalog-search{width:100%;max-width:100%}}
@media(max-width:720px){:root{--side:0px}.sidebar{display:none;top:59px;bottom:0;width:240px;align-items:stretch;padding:23px 18px;box-shadow:20px 0 40px #0002}.sidebar.open{display:flex}.sidebar .brand{display:none}.sidebar .eyebrow,.sidebar .current-course,.sidebar .side-rule,.sidebar .side-progress{display:block}.sidebar .current-course{display:flex}.sidebar .nav-button{width:100%;justify-content:flex-start}.sidebar .nav-button span{display:inline}.sidebar nav{margin-top:0}.sidebar .side-progress{margin-top:auto}.sidebar .side-bottom{margin-top:0}.topbar{height:60px;padding:0 17px;gap:10px}.mobile-menu{display:grid;color:#354730;border-color:#dce3d7;flex-shrink:0}.breadcrumb{font-size:12px;gap:7px;margin-right:auto}.breadcrumb .crumb-middle,.breadcrumb .crumb-end-arrow{display:none}.breadcrumb strong{max-width:125px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.top-actions{gap:7px}.demo-tag{font-size:10px;padding:4px 6px}.language{display:none}.content{padding:22px 16px}.course-heading{margin-bottom:17px}.course-heading h1{font-size:26px;letter-spacing:-.8px}.course-heading .eyebrow{font-size:10px}.course-heading p{font-size:12px}.course-tabs{gap:22px;margin-bottom:19px}.course-tab{font-size:13px;padding-bottom:13px}.workspace{grid-template-columns:1fr;gap:15px}.viewer{height:390px;min-width:0}.details{min-height:0;padding:20px}.parts-list{display:grid;grid-template-columns:1fr 1fr;gap:5px}.part-button{font-size:12px;min-height:39px;padding:7px}.part-detail{margin-top:16px}.part-detail p{font-size:15px}.part-detail h2{font-size:23px}.detail-note{font-size:13px}.mark-button{font-size:13px;min-height:41px}.viewer-bottom{bottom:15px;left:14px;right:14px}.viewer-header{top:17px;left:18px;right:16px}.viewer-hint{left:18px;bottom:69px;font-size:10px}.model-badge{left:18px;top:77px;font-size:10px}.viewer-title{font-size:10px}.viewer-title small{font-size:10px}.viewer-caption{font-size:11px;align-items:flex-start}.course-footer{align-items:stretch;flex-direction:column;gap:15px;margin-top:19px;padding-top:17px}.course-footer .primary{width:100%;min-height:46px;font-size:14px}.footer-copy strong{font-size:14px}.footer-copy p{font-size:12px}.heading-meta{display:none}.task-title{font-size:25px}.task-tip{margin-top:23px}.task-options{display:grid;grid-template-columns:1fr 1fr}.quiz-options{display:flex;flex-direction:column}.catalog-heading h1{font-size:30px}.catalog-heading p{font-size:14px;line-height:1.6}.catalog-filters{gap:5px}.catalog-filter{font-size:12px;padding:9px 10px}.catalog-grid{grid-template-columns:1fr}.card-image{height:230px}.catalog-note{font-size:12px;line-height:1.7}.toast{left:50%;width:max-content}.viewer-ghost{font-size:75px}.result-actions{flex-direction:row;flex-wrap:wrap}.dialog{padding:24px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}

/* Readable course content at the normal learning distance. */
.part-button,.course-tab,.task-option,.primary,.secondary{font-size:14px}.part-detail p,.task-description{font-size:16px}.detail-note,.mark-button{font-size:14px}.part-detail h2{line-height:1.2}.details{min-height:570px}.viewer{height:570px}.panel-heading .eyebrow{font-size:11px}.viewer-caption{font-size:12px}.task-option{line-height:1.45}.task-tip{font-size:13px}.footer-copy p{font-size:13px}
@media(max-width:720px){.viewer{height:390px}.details{min-height:0}.part-button{font-size:13px}.course-tab{font-size:14px}.task-option{font-size:14px}.viewer-caption{font-size:12px}.task-options{grid-template-columns:1fr 1fr}.task-options .part-num{width:16px}.course-tabs{gap:22px}.course-heading p{font-size:13px}}
.workspace>div,.details{min-width:0}.viewer canvas{max-width:100%}.viewer-caption{align-items:flex-start}.viewer-caption svg{flex-shrink:0;margin-top:3px}
@media(max-width:720px){.workspace{grid-template-columns:minmax(0,1fr)}.part-button{min-width:0}.part-button>span:nth-child(2){overflow-wrap:anywhere}.viewer-hint{font-size:10px}.details{overflow-wrap:break-word}}

/* Four exhibits share the same course surface and keep their visual identity. */
.catalog-grid{max-width:none;gap:22px}.catalog-tools{flex-wrap:wrap}.catalog-search{min-width:210px}.catalog-note{max-width:none}.equipment-card{transition:box-shadow .2s,transform .2s}.equipment-card:hover{box-shadow:0 10px 28px #1c302315;transform:translateY(-2px)}.card-image{aspect-ratio:16/9;height:auto}.card-image img{position:absolute;inset:0;object-fit:contain}.card-image img[hidden],.thumb-pending[hidden]{display:none}.thumb-pending{position:absolute;inset:0;display:grid;place-items:center;color:#bac9bf;font-size:13px}.card-body{padding:21px}.card-body p{line-height:1.5;min-height:21px}.card-tag{max-width:calc(100% - 28px)}.theme-navy,.viewer[data-theme=navy]{background:radial-gradient(ellipse at 48% 37%,#305571 0%,#203d58 43%,#112b44 100%)}.theme-air,.viewer[data-theme=air]{background:radial-gradient(ellipse at 48% 37%,#3c506a 0%,#293b55 43%,#182941 100%)}.model-loading{position:absolute;inset:140px 25px 110px;display:grid;place-items:center;text-align:center;font-size:15px;color:#d9e3d3;z-index:3}.current-course strong{line-height:1.4}#course-operator{color:inherit}.card-footer{gap:12px;line-height:1.5}.catalog-heading{margin-bottom:24px}
@media(max-width:950px){.catalog-grid{grid-template-columns:repeat(2,minmax(0,1fr));max-width:none}.card-body{padding:16px}.card-body h2{font-size:21px}.card-body p{font-size:12px;margin-bottom:17px}.card-footer{flex-wrap:wrap;font-size:12px}.card-image .card-tag{top:12px;left:12px;font-size:10px}.catalog-tools{gap:15px}}
@media(max-width:520px){.catalog-grid{grid-template-columns:minmax(0,1fr);gap:18px}.card-body{padding:20px}.card-body h2{font-size:23px}.card-body p{font-size:13px}.card-footer{flex-wrap:nowrap}.course-heading .eyebrow{flex-wrap:wrap;line-height:1.5}.course-heading p{flex-wrap:wrap}.catalog-search{min-width:0}}
.breadcrumb-home{background:none;color:inherit;padding:7px 0;font:inherit;text-align:left}.breadcrumb-home:hover{color:#303f9f;text-decoration:underline;text-underline-offset:3px}
.markers .marker-lines{position:absolute;inset:0;width:100%;height:100%;overflow:visible;pointer-events:none}.marker-lines .marker-line{stroke:#dfedcf85;stroke-width:1;stroke-dasharray:2 2}
.breadcrumb:has(#breadcrumb-service[hidden]) .crumb-end-arrow{display:none}
.count-chip{white-space:nowrap;flex-shrink:0}
.flag-mn{background:none;border:0;border-radius:0;font-size:22px;line-height:1;width:26px;height:20px}
.part-specification{margin:20px 0;border:1px solid #dce6f2;border-radius:9px;overflow:hidden;background:#f8faff}
.part-specification h3{font-size:14px;font-weight:650;letter-spacing:.1px;margin:0;padding:13px 14px;background:#edf3fb;color:#284e7c}
.part-specification dl{margin:0;padding:0 14px}
.part-specification dl>div{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.2fr);gap:12px;padding:11px 0;border-bottom:1px solid #e4ebf5;align-items:start}
.part-specification dl>div:last-child{border-bottom:0}
.part-specification dt{font-size:13px;line-height:1.5;color:#617590}
.part-specification dd{font-size:14px;line-height:1.5;font-weight:600;color:#23456e;margin:0;overflow-wrap:anywhere}
.part-detail .specification-note{font-size:12px;line-height:1.6;color:#6a7d96;margin:0;padding:4px 14px 12px}
.specification-sources{border-top:1px solid #e4ebf5;padding:10px 14px;font-size:12px;line-height:1.6;color:#4e6f9b}
.specification-sources summary{cursor:pointer;min-height:22px}
.specification-sources summary:focus-visible{outline:2px solid #4289c1;outline-offset:3px}
.specification-sources ul{padding-left:16px;margin:8px 0 2px}
.specification-sources li+li{margin-top:7px}
.specification-sources a{text-decoration:underline;text-underline-offset:3px;overflow-wrap:anywhere}
.point-info{position:absolute;top:0;left:0;width:190px;padding:12px 14px;border:1px solid #739ec4;border-radius:10px;z-index:3;background:#f7fbfff2;box-shadow:0 8px 24px #07193230;pointer-events:none;color:#173f6b;backdrop-filter:blur(10px)}
.point-info strong{display:flex;align-items:center;gap:8px;font-size:13px;line-height:1.35;margin-bottom:9px;font-weight:650}
.point-info strong span{display:grid;place-items:center;width:23px;height:23px;flex:0 0 23px;background:#dbefff;border-radius:50%;font-size:12px;color:#214d7c}
.point-info small{font-size:11px;line-height:1.4;color:#577597;display:block;margin-bottom:3px}
.point-info b{font-size:14px;line-height:1.4;font-weight:650;display:block}
@media(min-width:1151px){.workspace{grid-template-columns:minmax(0,1fr) 340px}}
@media(max-width:720px){.point-info{width:154px;padding:10px 11px}.point-info strong{font-size:12px;gap:6px;margin-bottom:6px}.point-info b{font-size:13px}.point-info strong span{width:21px;height:21px;flex-basis:21px}.part-specification dl>div{grid-template-columns:minmax(0,1fr) minmax(0,1.4fr)}}

/* DEEP AIx identity: original wordmark, navy framing and clear blue controls. */
.brand{display:flex;flex-direction:column;align-items:flex-start;gap:12px;padding:5px 12px 30px;width:100%}
.brand-wordmark{display:block;width:100%;max-width:188px;height:auto;object-fit:contain}
.brand-compact{display:none}
.brand .brand-product{display:block;font-size:11px;font-weight:650;color:#667b98;letter-spacing:1.6px;line-height:1.5}
.mobile-brand{display:none;background:none;padding:0;flex-shrink:0}
.mobile-brand img{display:block;width:136px;height:auto}
.brand-affiliation{display:flex;align-items:center;gap:10px;padding:4px 12px 20px;color:#234778;font-size:12px;font-weight:650}
.brand-affiliation img{width:40px;height:auto;object-fit:contain}
.brand-affiliation small{display:block;color:#6d7e94;font-size:11px;font-weight:400;margin-top:3px}
.top-product{color:#274777;font-size:13px;font-weight:600}
.demo-tag{border-color:#dce5f4;color:#597294;background:#f4f7fc;border-radius:20px;font-size:12px}
.topbar{border-bottom-color:#e0e7f1}
.sidebar{border-right-color:#e0e7f1}
.nav-button.active{box-shadow:inset 0 0 0 1px #dce5f8}
.catalog-heading{padding:29px 32px 28px;border-radius:16px;margin:0 0 26px;background:linear-gradient(115deg,#243b80 0%,#1f2d61 67%,#17375c 100%);border:1px solid #283b76;box-shadow:0 8px 25px #1534590c}
.catalog-heading .eyebrow{color:#b5d1ef;font-size:12px;letter-spacing:1.6px}
.catalog-heading h1{color:#fff;font-size:38px;letter-spacing:-1.3px;margin:10px 0 11px;font-weight:700}
.catalog-heading h1 span{color:#a9d0f2;font-weight:650}
.catalog-heading p{color:#d1dff0;font-size:16px;line-height:1.65;margin:0}
.catalog-search input{font-size:15px;min-height:46px;box-shadow:0 2px 4px #12346003}
.catalog-search input:focus-visible{outline:3px solid #4289c1;outline-offset:3px}
.catalog-filter{font-size:14px;min-height:44px;border-radius:8px;padding:10px 13px}
.catalog-filter.active{box-shadow:0 3px 8px #303f9f20;font-weight:600}
.catalog-filter:hover:not(.active){background:#edf3fd;border-color:#b7cceb;color:#254478}
.catalog-tools{gap:18px;align-items:center}
.equipment-card{border-radius:14px;box-shadow:0 2px 8px #15345905}
.equipment-card:hover{border-color:#9eb9dd;box-shadow:0 12px 26px #17396c12}
.card-image{border-bottom:1px solid #dfe6f0}
.card-image .card-tag{background:#172b4dcc;color:#dfecff;border-color:#b5cff32b;border-radius:5px;font-size:11px;font-weight:550;letter-spacing:.5px}
.card-body{padding:22px 24px}
.card-body h2{color:#163d6c;font-size:24px;letter-spacing:-.6px}
.card-body p{font-size:14px;color:#677b94}
.card-footer{font-size:13px;color:#697d98;padding-top:18px}
.card-footer strong{font-size:14px;color:#303f9f}
.catalog-note{color:#627998;line-height:1.7;background:#edf3fb}
.catalog-note svg{color:#4289c1;flex-shrink:0}
.course-heading h1{color:#153b68;font-weight:700}
.course-heading h1 span{color:#657a96}
.course-heading .eyebrow{color:#436694;font-size:12px}
.course-heading p{color:#637a98;font-size:14px}
.course-tab{color:#667994}
.course-tab.active{color:#303f9f}
.course-tab.active .tab-num{color:#303f9f}
.details{box-shadow:0 4px 16px #17345905;border-color:#dce5f0}
.panel-heading .eyebrow{color:#587394;font-size:12px}
.part-detail h2{color:#173f70}
.part-button.active{background:#eaf1ff;color:#23477a}
.part-button svg{color:#417b67}
.detail-note{color:#4e698c;background:#eef4fc}
.mark-button{color:#355b89}
.mark-button.learned{color:#34725c;background:#edf7f2;border-color:#cce5d9}
.primary{background:#303f9f;box-shadow:0 3px 8px #303f9f18;border-radius:8px;font-weight:600}
.primary:hover{background:#26347e}
.secondary{border-radius:8px}
.viewer{border:1px solid #253f63;box-shadow:0 8px 20px #14315812}
.viewer-title{color:#d4e5f9}.viewer-title small,.viewer-hint{color:#a9bfd8}
.model-badge{background:#30537d52;border-color:#7fa5cc45;color:#d4e6fd}
.view-presets{background:#0c1d38d9;border-color:#a5c6ef24}
.view-presets button{color:#a9bfd8}
.view-presets button.active,.view-presets button:hover{background:#325788;color:#fff}
.labels-toggle{background:#163055d9;border-color:#91b8e830;color:#d5e6fc}
.marker{background:#f5f9ff;color:#173c6b;border-color:#fff}
.marker.selected{background:#b7ddff;color:#0d3157;border-color:#e5f4ff;box-shadow:0 0 0 5px #6dbbff2b,0 2px 8px #0004}
.marker:hover{box-shadow:0 0 0 7px #89c6ff40}
.marker-lines .marker-line{stroke:#bbd9f999}
.practice-eyebrow{color:#5277a5}.practice-progress i{background:#e3ebf6}.practice-progress i.done{background:#4289c1}
.task-title{color:#173d69}.task-tip{color:#74859c}.footer-copy strong{color:#2c4c77}.footer-copy p{color:#71849d}
.breadcrumb-home:hover{color:#303f9f}.mobile-menu{color:#294879;border-color:#dbe5f3}
.dialog h2{color:#173f70}.dialog .icon-button{color:#4f6b90;border-color:#dbe5f3}
@media(max-width:1150px){.brand{padding-left:4px;padding-right:4px}.brand .brand-product{font-size:10px;letter-spacing:1px}.brand-affiliation{padding-left:4px;padding-right:4px}.top-product{display:none}.catalog-heading{padding:25px 27px}}
@media(max-width:950px){.brand{padding:0 0 30px;align-items:center}.brand-wordmark,.brand .brand-product,.brand-affiliation{display:none}.brand-compact{display:block;width:42px;height:auto}.mobile-brand{display:block;margin-right:8px}.breadcrumb .crumb-middle,.breadcrumb .crumb-end-arrow,.breadcrumb-home{display:none}.breadcrumb strong{max-width:200px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.topbar{gap:12px}.top-actions{gap:9px}.catalog-tools{align-items:stretch}.catalog-heading h1{font-size:34px}.catalog-heading p{font-size:15px}.card-body{padding:20px}.card-body h2{font-size:22px}}
@media(max-width:720px){.mobile-brand{margin-right:auto}.mobile-brand img{width:132px}.topbar{height:66px;padding:0 16px;gap:12px}.sidebar{top:65px}.breadcrumb{display:none}.top-actions{margin-left:auto}.demo-tag{font-size:11px;padding:5px 8px;white-space:nowrap}.catalog-heading{padding:23px 22px;border-radius:12px;margin-bottom:22px}.catalog-heading h1{font-size:30px;letter-spacing:-1px}.catalog-heading .eyebrow{font-size:10px;letter-spacing:1.2px}.catalog-heading p{font-size:14px}.catalog-filter{font-size:13px;min-height:42px;padding:9px 11px}.catalog-filters{gap:7px}.card-body h2{font-size:23px}.card-body p{font-size:14px}.card-footer{font-size:12px}.card-footer strong{font-size:13px}.course-heading .eyebrow{font-size:11px}.course-heading p{font-size:13px}.course-heading h1{font-size:28px}.course-tabs{gap:22px}.brand-affiliation{display:flex;padding:3px 12px 16px}.catalog-note{font-size:13px;padding:16px}.viewer-hint{color:#b5c9e0}.nav-button{font-size:14px}}
@media(max-width:380px){.mobile-brand img{width:116px}.topbar{gap:9px;padding:0 14px}.catalog-heading{padding:22px 18px}.catalog-heading h1{font-size:27px}.catalog-filter{font-size:12px;padding:8px 10px}.card-body{padding:18px}.card-body h2{font-size:22px}.card-footer{gap:8px}.card-footer strong{font-size:12px}}

/* Language controls remain available at every viewport size. */
.language-switch{display:flex;align-items:center;gap:3px;flex-shrink:0;border:1px solid #dce2ef;border-radius:8px;padding:3px;background:#fff}
.language-switch svg{width:15px;height:15px;margin:0 3px;color:#627087;fill:none;stroke:currentColor;stroke-width:1.5}
.language-switch button{border:0;background:transparent;color:#596579;font-family:inherit;font-size:12px;font-weight:600;line-height:1.4;padding:6px 8px;min-height:32px;border-radius:5px;cursor:pointer}
.language-switch button[aria-pressed="true"]{background:#243b80;color:#fff}
.language-switch button:focus-visible{outline:2px solid #478bd1;outline-offset:2px}
@media(max-width:600px){.top-actions{gap:7px}.language-switch svg{display:none}.language-switch button{padding:6px;min-width:30px}.topbar{gap:8px}.top-actions .demo-tag{display:none}}

@media(max-width:600px){.course-tabs{gap:10px}.course-tab{gap:6px}}
/* Compact point cards leave the model visible on narrow screens. */
@media(max-width:520px){.point-info{width:calc(100% - 28px);padding:9px 10px;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:3px 10px;align-items:start}.point-info[hidden]{display:none}.point-info strong{grid-column:1;grid-row:1/3;margin:0;font-size:11px}.point-info small{grid-column:2;font-size:10px;margin:0}.point-info b{grid-column:2;font-size:12px}}