/* Observation atlas: editorial hierarchy, field registers and readable evidence. */
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@media(max-width:359px){.page-heading h1,.article-header h1{font-size:29px;}.conditions-grid{grid-template-columns:1fr;}.water-state-grid>div{grid-template-columns:1fr;}.water-state{grid-row:auto;width:100%;height:85px;margin-bottom:10px;}.water-state-grid h3{margin-bottom:9px;}.search-suggestions{grid-template-columns:1fr;}.series-step{padding:20px 14px;gap:8px;}.card-copy{padding:22px;}.header-inner .brand{font-size:18px;}.site-header nav{font-size:11px;gap:8px;}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto;}.reveal-enter,.home-hero .hero-content{animation:none!important;}.world-card:hover,.destination-guide:hover,.reading-path-preview:hover,.search-suggestions a:hover,.series-step:hover{transform:none;}.card-arrow{transition:none;}.world-card:hover .card-arrow{transform:none;}}
@media(prefers-reduced-motion:no-preference){.reveal-enter{animation:atlas-enter .55s cubic-bezier(.22,.7,.3,1) both;}.home-hero .hero-content{animation:atlas-enter .7s ease-out;}}
/* Printed register and photographic chapter spreads. */
.brand-mark{width:27px;height:33px;border:1px solid var(--accent);border-radius:0;transform:rotate(-5deg);box-shadow:none;}
.brand-mark:before{inset:4px -5px -4px 5px;border-radius:0;border-color:#87968e;background:var(--bg);z-index:-1;}
.brand-mark:after{inset:7px 5px auto;border:0;border-top:1px solid var(--accent);height:0;}
.brand-mark i{inset:14px 5px auto;border-color:var(--accent);box-shadow:0 7px 0 #a8c8ba66;}
.brand small{font-family:var(--sans);letter-spacing:.15em;font-size:9px;line-height:2.5;}
.site-header{background:var(--bg);box-shadow:none;}
.site-header nav{font-size:12px;}
.home-hero:after{display:none;}
.home-hero h1{font-size:clamp(42px,5.3vw,76px);letter-spacing:.04em;font-weight:500;}
.home-hero h1 em{color:var(--text);font-style:normal;}
.hero-content{padding-top:90px;}
.hero-content>.eyebrow{font-family:var(--sans);font-size:12px;letter-spacing:.18em;}
.hero-description{max-width:530px;font-size:16px;}
.hero-bottom{margin-top:60px;}
.hero-ruler{opacity:.5;}
.button{background:var(--text);color:#112026;border-color:var(--text);box-shadow:none;}
.button:hover{background:#d4dfd8;color:#112026;box-shadow:none;transform:none;}
.button.secondary{background:transparent;color:var(--text);}
.intro-strip{background:transparent;}
.intro-grid{border-bottom:1px solid var(--line);}
.eyebrow{font-family:var(--sans);letter-spacing:.12em;font-weight:500;}
.section-heading:before{display:none;}
.section-heading{border-bottom:1px solid var(--line);padding-bottom:22px;}
.section-heading h2{font-size:32px;}
.world-card{background:transparent;border:0;border-radius:0;box-shadow:none;overflow:visible;}
.world-card:hover{border:0;background:transparent;box-shadow:none;transform:none;}
.world-card>a{height:100%;}
.card-image{border-radius:0;overflow:hidden;}
.card-image:after{display:none;}
.card-copy{padding:25px 0 0;}
.card-copy h3{font-family:var(--serif);font-weight:500;font-size:26px;}
.card-copy p{max-width:580px;}
.card-meta{border-top:1px solid var(--line);margin-top:24px!important;font-size:11px;}
.card-arrow{border:0;border-radius:0;background:#0b1319bb;width:34px;height:34px;top:0;right:0;}
.world-card:hover .card-arrow{background:var(--text);color:var(--bg);transform:none;}
.card-stamp{border:0;border-radius:0;background:#0b1319e8;padding:7px 10px;max-width:calc(100% - 20px);left:10px;bottom:10px;}
.atlas-contents{display:grid;grid-template-columns:120px repeat(5,minmax(0,1fr));padding-top:32px;padding-bottom:32px;gap:24px;border-bottom:1px solid var(--line);align-items:center;}
.contents-label{font:20px/1.8 var(--serif);}
.contents-label small{font:11px/1.8 var(--sans);color:var(--muted);}
.atlas-contents>a{display:flex;gap:15px;align-items:center;padding:14px 0;min-height:70px;border-top:1px solid var(--line);}
.contents-number{font:12px var(--mono);color:var(--accent);}
.atlas-contents a>span:nth-child(2){font-size:15px;}
.atlas-contents small{display:block;font-size:10px;color:var(--muted);margin-top:4px;}
.atlas-contents a>span:last-child{margin-left:auto;}
.field-chapter{padding-top:90px;padding-bottom:70px;scroll-margin-top:110px;}
.field-heading{display:grid;grid-template-columns:210px minmax(0,1fr);gap:8px 40px;border-top:1px solid var(--accent);padding-top:30px;margin-bottom:40px;}
.chapter-label{grid-row:1/4;display:flex;flex-direction:column;gap:18px;font-size:12px;color:var(--accent);}
.chapter-label>span:first-child{font:50px/1 var(--mono);font-weight:300;}
.field-heading h2{font-weight:500;font-size:36px;letter-spacing:.04em;}
.field-heading>p{font-size:14px;color:var(--muted);}
.field-heading>.text-link{justify-self:start;margin-top:12px;}
.field-spread{display:grid;grid-template-columns:minmax(0,1.55fr) minmax(0,1fr);gap:58px;}
.field-feature,.field-register{min-width:0;}
.field-feature .card-image{aspect-ratio:1.55;}
.field-feature .card-copy h3{font-size:32px;}
.field-feature .card-copy p{font-size:15px;}
.register-heading{display:block;font-size:11px;letter-spacing:.16em;border-top:1px solid var(--line);padding:15px 0;color:var(--muted);}
.register-entry{display:grid;grid-template-columns:22px 86px minmax(0,1fr) 16px;gap:13px;align-items:start;border-top:1px solid var(--line);padding:22px 0;min-height:118px;}
.register-number{font:11px/1.7 var(--mono);color:var(--muted);}
.register-entry img{width:86px;height:86px;object-fit:cover;}
.register-copy small{display:block;font:10px/1.9 var(--sans);color:var(--muted);margin-bottom:7px;}
.register-copy strong{font:18px/1.75 var(--serif);font-weight:500;}
.register-arrow{color:var(--accent);}
.register-entry:hover strong{text-decoration:underline;text-underline-offset:6px;text-decoration-thickness:1px;}
.field-note{border-top:1px solid var(--line);margin-top:18px;padding-top:25px;}
.field-note>span{font-size:11px;color:var(--accent);}
.field-note p{font-size:13px;color:var(--muted);line-height:2;margin:13px 0 18px;}
.field-chapter[data-field=underground] .field-spread{grid-template-columns:minmax(0,.8fr) minmax(0,1.6fr);}
.field-chapter[data-field=underground] .field-feature{grid-column:2;grid-row:1;}
.field-chapter[data-field=underground] .field-register{grid-column:1;grid-row:1;align-self:end;}
.field-chapter[data-field=underground] .field-feature .card-image{aspect-ratio:1.85;}
.field-chapter[data-field=atmosphere] .field-spread{grid-template-columns:minmax(0,1.25fr) minmax(0,1fr);gap:80px;}
.field-chapter[data-field=atmosphere] .field-register{padding-top:65px;}
.field-chapter[data-field=space] .field-spread{grid-template-columns:minmax(0,1fr) minmax(0,1.1fr);}
.field-chapter[data-field=space] .field-feature .card-image{aspect-ratio:1;max-width:480px;}
.field-chapter[data-field=deep-sea]{--accent:#a8c8ba;}
.field-chapter[data-field=underground]{--accent:#c4c09f;}
.field-chapter[data-field=atmosphere]{--accent:#a9c9d0;}
.field-chapter[data-field=space]{--accent:#c8b7ca;}
.series-banner{background:transparent;border:0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);border-radius:0;padding:55px 40px;gap:75px;}
.series-banner h2{font-weight:500;}
.depth-route{list-style:none;margin:0;padding:0 0 0 30px;border-left:1px solid var(--accent);min-width:140px;}
.depth-route li{position:relative;font-size:15px;line-height:1.8;padding:12px 0;}
.depth-route li:before{content:"";position:absolute;left:-35px;top:21px;width:9px;height:9px;background:var(--bg);border:1px solid var(--accent);}
.depth-route span{display:inline-block;font:11px var(--mono);color:var(--muted);margin-right:15px;}
.principle-grid>div{background:transparent;border:0;border-top:1px solid var(--line);border-radius:0;padding:24px 0;}
.principle-grid h3{font-weight:500;}
.principles>h2{font-size:32px;font-weight:500;margin:18px 0 35px;}
.guide-grid>div,.destination-guide{background:transparent;border:0;border-top:1px solid var(--line);border-radius:0;box-shadow:none;padding:30px 0;}
.destination-guide:hover{background:transparent;transform:none;box-shadow:none;}
.destination-guide[data-field]{position:relative;padding-left:30px;}
.destination-guide[data-field]:before{content:"";position:absolute;left:0;top:35px;width:8px;height:40px;border-top:1px solid var(--accent);border-bottom:1px solid var(--accent);}
.destination-guide[data-field=underground]:before{background:repeating-linear-gradient(0deg,#b7b18b55 0 2px,transparent 2px 9px);}
.destination-guide[data-field=atmosphere]:before{width:8px;height:8px;top:45px;border:1px solid #a9c9d0;box-shadow:0 13px 0 #a9c9d066,0 26px 0 #a9c9d022;}
.destination-guide[data-field=space]:before{width:9px;height:9px;top:43px;border:1px solid #c8b7ca;border-radius:50%;}
.destination-guide[data-field=deep-sea]:before{border-color:#a8c8ba;height:45px;background:linear-gradient(0deg,#a8c8ba66,transparent);}
.reading-path,.reading-path-preview{background:transparent;border:0;border-top:1px solid var(--line);border-radius:0;box-shadow:none;padding:28px 0;}
.reading-path-preview:hover{background:transparent;box-shadow:none;transform:none;}
.reading-path h3,.reading-path-preview h3{font-weight:500;font-family:var(--serif);}
.path-index{background:transparent;border:0;color:var(--accent);}
.page-heading:after{background:var(--line);}
.page-heading h1,.article-header h1{font-weight:500;}
.article-header h1{max-width:900px;font-size:52px;}
.article-deck{max-width:760px;}
.article-main-image .science-image{border:0;border-radius:0;}
.science-image figcaption{background:transparent;border-bottom:1px solid var(--line);padding:20px 0;}
.image-badges>span{padding:3px 0;border:0;border-bottom:1px solid var(--line);background:transparent;}
.image-badges{gap:20px!important;}
.journey-nav{background:transparent;border:0;border-top:1px solid var(--line);padding:22px 0;border-radius:0;}
.journey-nav nav a{padding-left:0;}
.journey-nav nav a.current{background:transparent;color:var(--accent);}
.answer-box{background:transparent;border:0;border-left:2px solid var(--accent);padding:5px 0 5px 26px;border-radius:0;}
.conditions-grid{gap:0 25px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.conditions-grid>div{background:transparent;border:0;border-bottom:1px solid var(--line);border-radius:0;padding:23px 0;}
.conditions-grid dt{letter-spacing:.1em;}
.evidence-grid>div{background:transparent;border:0;border-top:1px solid var(--line);padding:23px 0;}
.unknown-box{background:transparent;border:0;border-left:1px dashed var(--line);padding:0 0 0 25px;}
.sources-section{background:transparent;border:0;border-top:1px solid var(--line);padding:30px 0;border-radius:0;}
.source-id{border:0;border-bottom:1px solid var(--line);padding-left:0;border-radius:0;}
.journey-stop h2{font-weight:500;}
.policy-index{background:transparent;border:0;border-top:1px solid var(--line);padding:24px 0;border-radius:0;}
.policy-content>section{background:transparent;border:0;border-top:1px solid var(--line);padding:30px 0;border-radius:0;}
.policy-content h2{font-weight:500;}
.policy-content p{max-width:730px;}
.contact-layout aside{background:transparent;border:0;border-top:1px solid var(--line);padding:26px 0;}
.contact-form{background:transparent;border:0;border-top:1px solid var(--line);padding:28px 0;border-radius:0;box-shadow:none;}
.form-panel-heading{padding-bottom:22px;}
.consent{background:#152128;border-radius:0;}
.contact-form input:not([type=checkbox]),.contact-form select,.contact-form textarea{background:#101b22;border-radius:0;}
.search-heading .search-form{background:transparent;border:0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:25px 0;border-radius:0;}
.search-result .world-card{border-radius:0;}
.search-excerpt{background:transparent;border-left:1px solid var(--line);border-radius:0;margin-top:20px;padding:5px 20px;}
.search-suggestions a{background:transparent;border:0;border-top:1px solid var(--line);border-radius:0;padding:20px 0;}
.search-empty{background:transparent;border:0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);border-radius:0;}
.status-emblem{border-radius:0;background:transparent;width:65px;height:65px;box-shadow:none;}
.error-coordinate{font-weight:300;opacity:1;text-shadow:none;}
footer{background:transparent;border-color:var(--line);}
@media(max-width:1100px){.atlas-contents{grid-template-columns:80px repeat(5,minmax(0,1fr));gap:16px;}.atlas-contents a{gap:8px;}.atlas-contents a>span:nth-child(2){font-size:13px;}.field-heading{grid-template-columns:160px minmax(0,1fr);gap:8px 30px;}.field-spread{gap:35px;}.register-entry{grid-template-columns:20px 64px minmax(0,1fr) 12px;gap:10px;}.register-entry img{width:64px;height:74px;}.register-copy strong{font-size:16px;}.field-chapter[data-field=atmosphere] .field-spread{gap:35px;}.field-feature .card-copy h3{font-size:28px;}.field-heading h2{font-size:32px;}}
@media(max-width:700px){.brand small{font-size:8px;}.home-hero{min-height:650px;}.hero-content{padding-top:48px;}.home-hero h1{font-size:clamp(34px,8.8vw,49px);line-height:1.6;letter-spacing:.01em;margin-top:26px;}.hero-description{font-size:14px;}.hero-bottom{margin-top:38px;}.section-heading{border-left:0;padding-left:0;}.section-heading h2{font-size:27px;}.atlas-contents{grid-template-columns:1fr 1fr;gap:0 23px;padding-top:25px;padding-bottom:25px;}.contents-label{grid-column:1/-1;font-size:18px;margin-bottom:17px;}.contents-label br{display:none;}.contents-label small{margin-left:16px;}.atlas-contents>a{gap:12px;}.atlas-contents a>span:nth-child(2){font-size:13px;}.field-chapter{padding-top:55px;padding-bottom:35px;scroll-margin-top:28px;}.field-heading{display:block;padding-top:23px;margin-bottom:26px;}.chapter-label{flex-direction:row;align-items:center;gap:16px;margin-bottom:20px;font-size:11px;}.chapter-label>span:first-child{font-size:30px;}.field-heading h2{font-size:28px;line-height:1.7;}.field-heading>p{margin:16px 0;font-size:13px;}.field-heading>.text-link{display:inline-block;margin-top:0;}.field-spread,.field-chapter[data-field=underground] .field-spread,.field-chapter[data-field=atmosphere] .field-spread,.field-chapter[data-field=space] .field-spread{display:flex;flex-direction:column;gap:26px;}.field-chapter[data-field=underground] .field-register{align-self:stretch;}.field-chapter[data-field=atmosphere] .field-register{padding-top:0;}.field-feature .card-copy h3{font-size:26px;}.field-feature .card-copy p{font-size:14px;}.field-chapter[data-field=space] .field-feature .card-image{aspect-ratio:1.45;}.card-copy{padding:21px 0 0;}.card-meta{font-size:10px;}.register-entry{grid-template-columns:20px 72px minmax(0,1fr) 12px;gap:12px;padding:20px 0;}.register-entry img{width:72px;height:80px;}.register-copy strong{font-size:17px;}.register-copy small{font-size:10px;}.field-note{margin-top:10px;padding-top:20px;}.series-banner{padding:35px 0;display:grid;grid-template-columns:1fr;gap:28px;margin-left:22px;margin-right:22px;}.depth-route{display:grid;grid-template-columns:1fr 1fr;gap:0 25px;padding-left:20px;}.depth-route li:before{left:-25px;}.series-banner h2{font-size:27px;}.principles>h2{font-size:28px;}.principle-grid>div{padding:22px 0;}.guide-grid>div,.destination-guide{padding:24px 0;}.destination-guide[data-field]{padding-left:25px;}.reading-path,.reading-path-preview{padding:24px 0;}.article-header h1{font-size:32px;}.article-main-image .science-image{border-radius:0;}.science-image figcaption{padding:18px 0;}.journey-nav{padding:20px 0;}.answer-box{padding:5px 0 5px 20px;}.conditions-grid{gap:0 22px;}.conditions-grid>div{padding:19px 0;}.evidence-grid>div{padding:22px 0;}.unknown-box{padding:0 0 0 20px;}.sources-section{padding:28px 0;}.policy-index{padding:20px 0;}.policy-content>section{padding:25px 0;}.contact-layout aside{padding:24px 0;}.contact-form{padding:26px 0;}.search-heading .search-form{padding:22px 0;}.search-suggestions a{padding:20px 0;}.search-excerpt{padding:5px 17px;}.series-step{border-radius:0;padding:24px 0;border:0;border-top:1px solid var(--line);background:transparent;}.series-step img{height:auto;aspect-ratio:1.6;object-fit:cover;border-radius:0;}.series-step>div{padding-top:8px;}}
@media(max-width:359px){.home-hero h1{font-size:30px;}.register-entry{grid-template-columns:16px 60px minmax(0,1fr) 12px;gap:9px;}.register-entry img{width:60px;height:75px;}.register-copy strong{font-size:16px;}.atlas-contents{gap:0 17px;}.article-header h1{font-size:29px;}}
h1,h2,h3{text-wrap:balance;}
.register-method{display:block;font-size:10px;color:var(--muted);margin-top:8px;line-height:1.8;}

.series-step{border:0;border-top:1px solid var(--line);border-radius:0;background:transparent}

.register-copy strong{display:block;text-wrap:balance}

/* Instrument-specific explanatory figures, with their limits beside the visual. */
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@media(max-width:700px){.measurement-figure{padding:23px 0}.measurement-figure>figcaption{font-size:23px}.relief-comparison{gap:22px}.relief-comparison h3{font-size:14px}.measurement-note{font-size:12px}.measurement-table th,.measurement-table td{padding:17px 7px}.measurement-table th{width:37%;font-size:13px}.measurement-table p,.measurement-table small{font-size:12px}.measurement-table thead th{font-size:11px}.pixel-comparison{grid-template-columns:1fr;gap:22px}.pixel-grid{max-width:330px}.pixel-explanation p{font-size:13px}}
@media(max-width:359px){.relief-comparison{gap:15px}.relief-comparison h3{font-size:13px}.relief-model{height:115px}.measurement-table th{width:40%;font-size:12px}.measurement-table th,.measurement-table td{padding-left:4px;padding-right:4px}}

/* Ice records: a solid body, a local basal water example, and a separate flow section. */
body[data-world=polar],.field-chapter[data-field=polar]{--accent:#aac7cd;}
.field-chapter[data-field=polar] .field-spread{grid-template-columns:minmax(0,1.45fr) minmax(0,1fr);}
.field-chapter[data-field=polar] .field-register{align-self:end;}
.ice-section{margin:35px 0;border-top:2px solid var(--line);border-bottom:1px solid var(--line);padding:25px 0;}
.ice-section figcaption{font-family:var(--serif);font-size:23px;line-height:1.7;margin-bottom:25px;}
.ice-bed-model{height:280px;position:relative;overflow:hidden;background:#e7edef;color:#29464e;font-size:13px;}
.ice-surface-label{position:absolute;top:8px;left:18px;}
.ice-body{position:absolute;inset:40px 0 65px;background:#c4d8dd;border-top:2px solid #7c9da6;}
.ice-body>span:first-child{position:absolute;top:20px;left:18px;font-size:26px;font-family:var(--serif);}
.ice-rock{position:absolute;bottom:0;width:100%;height:65px;background:#8b8e82;clip-path:polygon(0 0,25% 0,35% 25%,65% 25%,75% 0,100% 0,100% 100%,0 100%);}
.ice-rock span{position:absolute;bottom:12px;right:18px;color:#101e24;}
.basal-water{position:absolute;bottom:48px;left:25%;width:50%;height:17px;background:#4e8f9f;clip-path:polygon(0 0,100% 0,80% 100%,20% 100%);}
.basal-label{position:absolute;bottom:75px;left:27%;font-weight:bold;}
.radar-path{position:absolute;top:0;bottom:0;right:22%;border-left:2px dashed #446873;width:14px;border-right:2px dashed #446873;}
.radar-label{position:absolute;top:20px;right:3%;font-size:12px;writing-mode:vertical-rl;}
.ice-reading-key{display:grid;grid-template-columns:1fr 1fr;gap:25px;margin:24px 0;}
.ice-reading-key>div{border-top:1px solid var(--line);padding-top:16px;min-width:0;}
.ice-reading-key dt{font-weight:bold;font-size:16px;}.ice-reading-key dd{margin:10px 0 0;font-size:14px;line-height:2;}
.ice-section-note{font-size:12px!important;line-height:2!important;color:var(--muted);}
.ice-flow-model{background:#d0dfe3;color:#29464e;overflow:hidden;}
.ice-flow-upper{height:85px;position:relative;background:#e7edef;padding:12px 18px;font-size:13px;}
.ice-flow-upper i{position:absolute;top:0;left:30%;height:75px;width:18px;background:#506e78;clip-path:polygon(0 0,100% 0,70% 100%);}
.ice-flow-upper i:nth-of-type(2){left:55%;height:60px;}.ice-flow-upper i:nth-of-type(3){left:80%;height:68px;}
.ice-flow-upper span{position:relative;z-index:1;background:#e7edef;padding-right:5px;}
.ice-flow-middle{padding:20px 18px;display:grid;grid-template-columns:1fr 1fr 1fr;align-items:center;gap:10px;}
.ice-flow-middle span{grid-column:1/-1;font-family:var(--serif);font-size:23px;}.ice-flow-middle b{font-size:36px;font-weight:normal;}
.ice-flow-base{padding:10px 18px;border-top:1px solid #7c9da6;font-size:13px;}.ice-flow-rock{padding:14px 18px;background:#8b8e82;color:#101e24;font-size:13px;}
@media(max-width:1100px) and (min-width:701px){.atlas-contents{grid-template-columns:80px repeat(3,minmax(0,1fr));}.contents-label{grid-row:1/3;}}
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/* Secondary comparisons remain concise, readable links rather than repeated panels. */
.other-reading-paths{border-top:1px solid var(--line);margin-top:24px;padding-top:18px;display:flex;flex-wrap:wrap;gap:12px 25px;align-items:baseline;}
.other-reading-paths>span{font-size:12px;color:var(--muted);}.other-reading-paths a{font-size:14px;padding:8px 0;text-decoration:underline;text-underline-offset:5px;line-height:1.8;}
.reading-path,.reading-paths{scroll-margin-top:110px;}
@media(max-width:700px){.reading-path,.reading-paths{scroll-margin-top:28px;}}
@media(max-width:700px){.other-reading-paths{display:block;}.other-reading-paths a{display:block;margin-top:10px;}}

/* Sources read as named records and lead back to their use in the article. */
.source-inline .source-reference,.measurement-sources .source-reference{display:block;min-height:44px;padding:10px 0;line-height:1.9;font-size:13px;overflow-wrap:anywhere;text-decoration:underline;text-underline-offset:4px;}
.source-reference>span{font-family:var(--mono);font-size:11px;color:var(--muted);}
.source-return{margin-top:15px;padding-left:16px;border-left:1px solid var(--line);}
.source-return>span{display:block;font-size:11px;color:var(--muted);margin-bottom:6px;}
.sources-section .source-return a{display:block;min-height:44px;width:fit-content;max-width:100%;padding:9px 0;font-size:13px;text-decoration:underline;text-underline-offset:4px;line-height:1.9;}
.sources-section li:target{outline:1px solid var(--accent);outline-offset:8px;}
@media(max-width:700px){.source-inline .source-reference,.measurement-sources .source-reference{font-size:12px;}.sources-section .source-return a{font-size:12px;}}

/* Chapter exits keep long mobile articles navigable without fixed overlays. */
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.chapter-navigation a{min-height:44px;padding:10px 0;align-self:start;overflow-wrap:anywhere;text-decoration:underline;text-underline-offset:5px;}
.chapter-navigation a:last-child{text-align:right;}
.chapter-navigation small{display:block;color:var(--muted);font-size:11px;text-decoration:none;}
#journey-index,#sources{scroll-margin-top:110px;}
@media(max-width:700px){.chapter-navigation{gap:20px;font-size:12px;}#journey-index,#sources{scroll-margin-top:28px;}}

/* Each photograph or reconstruction names its evidence beside the caption. */
.image-sources{border-top:1px solid var(--line);margin-top:16px;padding-top:12px;}
.image-sources>span{font-size:11px;color:var(--muted);}
.image-sources .source-reference{display:block;min-height:44px;padding:10px 0;font-size:13px;line-height:1.9;overflow-wrap:anywhere;text-decoration:underline;text-underline-offset:4px;}
#opening-image{scroll-margin-top:110px;}
@media(max-width:700px){.image-sources .source-reference{font-size:12px;}#opening-image{scroll-margin-top:28px;}}

/* Keep the same two-column table semantics while reading each record vertically on phones. */
.mobile-table-label{display:none;}
.field-error{display:block;color:#f4b6a6;font-size:13px;line-height:1.9;overflow-wrap:anywhere;}
.field-error:empty{display:none;}
.contact-form [aria-invalid=true]{border-color:#f4b6a6;}
.form-errors h3{font-size:17px;}.form-errors p{font-size:14px;margin:10px 0;}
.form-errors a{display:block;min-height:44px;padding:10px 0;font-size:14px;line-height:1.9;text-decoration:underline;overflow-wrap:anywhere;}
#contact-errors,.contact-form [id]{scroll-margin-top:110px;}
@media(max-width:700px){#contact-errors,.contact-form [id]{scroll-margin-top:28px;}}
.relief-width-note{display:block;font-size:12px;color:var(--muted);margin-top:8px;line-height:1.9;}
@media(max-width:700px){
  .measurement-table,.earth-profile table{display:block;position:relative;}
  .measurement-table caption,.earth-profile table caption{display:block;font-size:13px;line-height:1.9;}
  .measurement-table thead,.earth-profile table thead{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap;}
  .measurement-table tbody,.earth-profile table tbody{display:block;}
  .measurement-table tbody tr,.earth-profile table tbody tr{display:grid;grid-template-columns:minmax(0,1fr);border-top:1px solid var(--line);padding:20px 0;}
  .measurement-table tbody th,.earth-profile table tbody th{display:block;width:auto;font-size:16px;padding:0;border:0;line-height:1.9;}
  .measurement-table tbody td,.earth-profile table tbody td{display:block;padding:14px 0 0;border:0;font-size:14px;line-height:1.9;}
  .measurement-table tbody p,.measurement-table tbody small,.earth-profile table tbody small{font-size:14px;line-height:1.9;}
  .earth-profile table tbody th small{display:inline-block;margin:0 0 0 12px;}
  .earth-profile table tbody th:first-child{width:auto;}
  .mobile-table-label{display:block;font-size:12px;color:var(--muted);margin-bottom:8px;}
}

.search-actions{display:flex;flex-wrap:wrap;gap:8px 28px;margin-top:20px}.search-actions a{display:inline-flex;align-items:center;min-height:44px;text-decoration:underline;font-size:14px}.search-heading #q{scroll-margin-top:110px}@media(max-width:700px){.search-heading #q{scroll-margin-top:28px}}

.storm-section{margin:36px 0;border-top:2px solid #9db8ca;border-bottom:1px solid var(--line);padding:24px 0;background:#0b1722}
.storm-section>figcaption{font:23px/1.7 var(--serif);padding:0 22px}.storm-layout{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,1fr);gap:28px;padding:26px 22px}.storm-layout>*{min-width:0}
.storm-air,.storm-charge{border-left:1px solid #587284;border-right:1px solid #587284;align-self:start}.storm-anvil{border-top:8px solid #9db8ca;border-bottom:1px solid #587284;padding:18px 12px;text-align:center;font-size:14px;line-height:1.9}.storm-columns{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr) minmax(0,1fr);gap:4px;padding:20px 6px;align-items:center}.storm-up,.storm-down{text-align:center;font-size:14px;line-height:1.9}.storm-up>span,.storm-down>span{display:block}.storm-up{color:#b6dfde}.storm-down{color:#c5d5ef}.storm-mixture{display:grid;gap:14px;text-align:center}.storm-mixture i{font-style:normal;font-size:14px;border-bottom:1px dotted #7893a4;padding:5px 0}.storm-base{border-top:1px solid #587284;padding:18px 12px;font-size:14px;line-height:1.9;text-align:center}
.storm-charge>div{padding:18px 14px;border-bottom:1px solid #587284;display:grid;gap:8px;text-align:center}.storm-charge>div:last-child{border-bottom:0}.storm-charge span{font-size:34px;line-height:1.4;letter-spacing:8px;color:#c9dced}.storm-charge>div:nth-child(2) span{color:#b6dfde}.storm-charge strong{font-size:14px;line-height:1.9;font-weight:500}.storm-key{margin:0}.storm-key>div+div{margin-top:22px;padding-top:20px;border-top:1px solid var(--line)}.storm-key dt{font:18px/1.7 var(--serif);color:var(--text);margin-bottom:8px}.storm-key dd{margin:0;font-size:14px;line-height:2;color:var(--muted)}.storm-note,.storm-sources{padding:0 22px;font-size:14px!important;line-height:2!important;margin:0 0 18px!important;color:var(--muted)}.storm-sources a{display:inline-flex;align-items:center;min-height:44px;cursor:pointer}
.storm-sources a{max-width:100%;min-width:0;flex-wrap:wrap;overflow-wrap:anywhere}
@media(max-width:700px){.storm-layout{grid-template-columns:minmax(0,1fr);padding:22px 17px;gap:24px}.storm-section>figcaption{font-size:21px;padding:0 17px}.storm-note,.storm-sources{padding:0 17px}}
.storm-up>span,.storm-down>span{font-size:0;width:22px;height:90px;position:relative;margin:0 auto 10px}.storm-up>span:before,.storm-down>span:before{content:'';position:absolute;left:10px;top:8px;width:2px;height:76px;background:currentColor}.storm-up>span:after,.storm-down>span:after{content:'';position:absolute;top:0;left:4px;border-left:7px solid transparent;border-right:7px solid transparent;border-bottom:12px solid currentColor}.storm-down>span{transform:rotate(180deg)}