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.knowledge-band{background:var(--navy);color:white;margin-block:15px 55px;padding-block:54px}.knowledge-layout{display:grid;grid-template-columns:1.1fr .9fr;gap:80px;align-items:center}.knowledge-band h2{color:#fff;font-size:40px;max-width:650px}.knowledge-band p{color:#d3e1ef;font-size:17px;max-width:610px}.sample-question{background:#153d70;border:1px solid #3d6598;padding:33px;border-radius:22px}.sample-question h3{font-size:27px;color:#fff}.sample-question a{display:flex;color:#c8e7ff;text-decoration:none;justify-content:space-between;font-size:14px;font-weight:600}.home-guides{padding-block:10px 55px}.editorial-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:28px}.editorial-grid .hangar-photo{aspect-ratio:1.8}.editorial-grid .hangar-copy h3{font-size:26px}.regional-focus{display:grid;grid-template-columns:1fr 1fr;gap:50px;align-items:center;padding-block:20px 60px}.regional-focus .airframe img{width:100%;border-radius:23px;aspect-ratio:1.35;object-fit:cover}.regional-focus h2{font-size:39px}.regional-focus>div>p{font-size:16px;color:var(--gray)}.local-doors a{display:flex;gap:15px;justify-content:space-between;border-bottom:1px solid var(--line);padding:15px 0;text-decoration:none;font-size:16px;font-weight:600}.local-doors a:hover{text-decoration:underline}.home-calendar{padding-block:25px 70px}.calendar-preview{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}.calendar-preview>a{padding:26px;background:var(--light);border-radius:18px;text-decoration:none;display:flex;flex-direction:column;align-items:start}.calendar-preview time{font-size:13px;font-weight:600;color:#315c91;margin-bottom:18px}.calendar-preview h3{font-size:24px}.calendar-preview span{font-size:13px;color:var(--gray);margin-bottom:18px}.calendar-preview svg{margin-left:auto;margin-top:auto}
.breadcrumbs{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:12px;color:var(--gray);margin-bottom:30px}.breadcrumbs a{text-decoration:none}.reading-top{max-width:1100px;padding-block:36px}.reading-top h1{max-width:1070px}.lead{max-width:1050px;font-size:21px;color:var(--gray);line-height:1.6}.revision{font-size:12px;color:var(--gray);margin-top:22px;margin-bottom:0}.cover-photo{max-width:1100px;margin-bottom:40px}.cover-photo .airframe>img{width:100%;height:440px;object-fit:cover;border-radius:23px}.cover-photo .silhouette{max-width:800px;margin:auto}.reading-column{width:calc(100% - 48px);max-width:790px;margin:0 auto 60px;font-size:18px;line-height:1.85;overflow-wrap:break-word}.reading-column>h2{font-size:32px;line-height:1.2;margin-top:40px}.reading-column>p{margin-bottom:25px}.reading-map{border:1px solid var(--line);padding:18px 22px;border-radius:15px;margin-bottom:35px;font-size:15px;background:#f6faff}.reading-map summary{font-weight:600;cursor:pointer;color:var(--navy)}.reading-map ol{padding-left:22px;line-height:1.7}.reading-map li{margin:10px 0}.reading-sources{border-top:1px solid var(--line);margin-top:45px;padding-top:28px;font-size:14px;line-height:1.65}.reading-sources h2{font-size:24px}.reading-sources p{color:var(--gray);font-size:13px}.reading-sources ul{padding-left:18px}.reading-sources li{margin-bottom:11px}.related-reading{margin-block:40px 70px}.related-reading>h2{margin-bottom:30px}.machine-intro{display:grid;grid-template-columns:1.5fr 1fr;gap:35px;max-width:1100px;margin-bottom:45px;align-items:center}.machine-intro .airframe>img{width:100%;aspect-ratio:1.5;object-fit:cover;border-radius:22px}.machine-intro aside{padding:30px;background:var(--light);border-radius:22px}.machine-intro aside h2{font-size:34px}.machine-intro aside p{font-size:15px}.machine-table{border:1px solid var(--line);border-radius:18px;padding:26px;margin-bottom:35px;background:#f7fbff}.machine-table h2{font-size:28px}.machine-table>p{font-size:13px;color:var(--gray)}.machine-table dl{margin:0;font-size:15px;line-height:1.6}.machine-table dl>div{display:grid;grid-template-columns:1fr 1.5fr;gap:22px;padding:13px 0;border-top:1px solid var(--line)}.machine-table dt{color:var(--gray)}.machine-table dd{margin:0;font-weight:600}.local-list{margin-block:30px 45px}.local-list h2,.dates-list h2,.known-events h2{font-size:30px}.local-list article{padding:23px 0;border-top:1px solid var(--line)}.local-list article h3{font-size:25px;margin-bottom:9px}.local-list article p{font-size:16px;margin-bottom:12px}.local-list .local-place{font-size:13px;color:var(--gray)}.local-list a{font-size:14px;display:inline-flex;align-items:center;gap:10px}.dates-list>p{font-size:14px;color:var(--gray)}.dates-list article{display:grid;grid-template-columns:180px 1fr;gap:26px;padding-block:25px;border-top:1px solid var(--line)}.dates-list article h3{font-size:25px}.dates-list article p{font-size:15px;margin-bottom:12px}.date-calendar strong{display:block;font-size:16px;line-height:1.6;color:var(--blue)}.date-calendar span{font-size:12px;color:var(--gray);display:block;margin-top:10px}.dates-list article a{font-size:14px;display:inline-flex;align-items:center;gap:10px}.edition-status{display:inline-block;background:#e9f2fe;color:#204e83;padding:5px 10px;border-radius:8px;font-size:12px!important}.known-events{padding:25px;background:var(--light);border-radius:18px;margin-block:25px 40px}.known-events p{font-size:15px}.topic-grid{display:grid;grid-template-columns:1fr 1fr;gap:15px;margin-block:25px 40px}.topic-grid>a{display:block;position:relative;background:var(--light);border:1px solid var(--line);border-radius:15px;padding:22px 46px 22px 22px;text-decoration:none}.topic-grid strong{font-size:18px;color:var(--navy);display:block;line-height:1.3}.topic-grid span{font-size:12px;color:var(--gray)}.topic-grid svg{position:absolute;right:17px;top:39%}
.exercise{margin-top:45px;border-top:3px solid var(--blue);padding-top:30px}.exercise>h2{font-size:32px}.exercise>p{font-size:15px;color:var(--gray)}.exercise ol{padding:0;list-style:none;counter-reset:question}.exercise li{counter-increment:question;margin-block:30px}.exercise fieldset{border:1px solid var(--line);border-radius:17px;margin:0;padding:22px}.exercise legend{font-size:19px;font-weight:600;line-height:1.6;padding-inline:5px}.exercise legend:before{content:counter(question) ' / ';color:var(--blue)}.exercise label{display:flex;align-items:start;gap:13px;padding:13px 10px;margin-top:7px;background:#f4f8fc;border-radius:10px;cursor:pointer;line-height:1.6;font-size:16px}.exercise input{margin:6px 0 0;accent-color:var(--blue);flex-shrink:0}.exercise label:has(input:checked){background:#deebff}.exercise fieldset.is-correct{border:2px solid #1b805e}.exercise fieldset.is-wrong{border:2px solid #b24731}.solution{border:1px solid var(--line);border-radius:12px;margin-top:10px;padding:12px 18px;font-size:15px;line-height:1.7}.solution summary{cursor:pointer;color:var(--blue);font-weight:600}.solution p{margin:14px 0 5px}.exercise-actions{display:flex;gap:12px;flex-wrap:wrap}.exercise-result{background:var(--light);border-radius:12px;padding:18px;margin-top:20px;font-weight:600;font-size:16px}
.index-page{padding-block:35px 65px}.index-page>.lead{max-width:950px}.model-selector{display:flex;align-items:center;gap:18px;margin-block:30px 15px;padding:20px;background:var(--light);border-radius:15px;font-size:15px}.model-selector label{font-weight:600}.model-selector select{padding:11px;border:1px solid #abc3da;max-width:100%;border-radius:7px;background:white}.model-result{font-size:14px;color:var(--gray);margin-bottom:25px}.guide-directory{display:grid;grid-template-columns:1fr 1fr;gap:35px 60px;margin-block:40px}.guide-directory h2{font-size:29px;border-bottom:3px solid var(--blue);padding-bottom:14px}.guide-directory ul{list-style:none;margin:0;padding:0}.guide-directory li{border-bottom:1px solid var(--line);padding:17px 0}.guide-directory li a{font-size:18px;font-weight:600;text-decoration:none;line-height:1.4;display:block}.guide-directory li p{font-size:14px;color:var(--gray);margin:10px 0 0}.photo-library{display:grid;grid-template-columns:1fr 1fr;gap:40px;margin-top:35px}.photo-library img{border-radius:15px;width:100%}.rights-intro{max-width:900px;font-size:16px}.large-query{max-width:800px;margin-block:35px}.large-query label{display:block;font-size:15px;font-weight:600;margin-bottom:10px}.large-query>div{display:flex;gap:12px}.large-query input{flex:1;min-width:0;padding:14px 18px;border:1px solid #a7bed4;border-radius:9px}.search-feedback{font-size:15px;color:var(--gray)}.search-output{max-width:900px}.search-output>article{padding:23px 0;border-bottom:1px solid var(--line)}.search-output h2{font-size:25px}.search-output h2 a{text-decoration:none}.search-output p{font-size:16px;color:var(--gray)}.full-index{columns:2;column-gap:70px;margin-top:40px}.full-index section{break-inside:avoid;margin-bottom:35px}.full-index h2{font-size:28px}.full-index ul{padding-left:20px}.full-index li{font-size:15px;margin-bottom:12px}.gone-panel{padding:30px;background:var(--light);border-radius:20px;max-width:900px}.gone-panel a{margin:10px 10px 0 0}
.ground{background:#071f40;color:#fff;padding-block:45px 28px}.ground-intro{display:flex;align-items:center;justify-content:space-between;gap:35px;border-bottom:1px solid #ffffff30;padding-bottom:30px}.ground-intro>p{font-size:23px;line-height:1.4;margin:0;font-weight:600}.ground-columns{display:grid;grid-template-columns:1fr 1fr 1fr;gap:60px;padding-block:32px}.ground h2{font-size:19px;color:#fff;margin-bottom:16px;letter-spacing:-.01em}.ground-columns a{font-size:14px;display:block;margin-block:8px;color:#cfdfef;text-decoration:none}.ground-columns a:hover{color:#fff;text-decoration:underline}.ground-note{font-size:11px;line-height:1.7;color:#afc4db;margin:0;border-top:1px solid #ffffff30;padding-top:22px}
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