/* Cardio Atlas — quiet editorial identity and the integrated knowledge library. */
:root{--paper:#f7f7f2;--sheet:#fffefa;--ink:#253c33;--green:#244b40;--sage:#eef0e7;--muted:#798375;--line:#dde1d5;--gold:#aa8760;--red:#a76550}body{-webkit-font-smoothing:antialiased}.site-header{background:rgba(247,247,242,.97)}.header-top{height:91px}.brand{gap:13px;letter-spacing:0;line-height:1.2}.brand-mark{border:0;border-radius:0;width:44px;height:44px;display:block}.brand-mark img{width:100%;height:100%}.brand-name{font:27px/1.1 Georgia,'Times New Roman',serif;letter-spacing:-1.2px;font-weight:400}.brand-name em{font-weight:400}.brand small{font:7px/1.7 var(--sans);letter-spacing:2px;margin-top:7px}.header-bottom{height:48px;border-top-color:#e7e9df}.header-bottom nav{gap:33px}.header-bottom nav a{font-size:12px}.header-bottom nav a[aria-current=page]:after{height:2px}.search-wrap{border-bottom-color:#d3d9cb}.mode-switch{background:#ecefe4;padding:3px}.mode-switch button[aria-pressed=true]{box-shadow:none}.primary,.secondary{border-radius:2px;box-shadow:none;padding:12px 20px}.primary{background:#244b40}.primary:hover{background:#366454}.secondary{border-color:#d0d7c6}.card,.lesson-card,.lab-shell,.lab-tile,.filterbar,.one-sentence,.version-note,.option,.answer-panel{border-radius:2px;box-shadow:none}.page-head{padding:48px 0 32px}.page-head h1{font-size:38px}.badge{border-radius:2px;padding:3px 6px;font-size:9px;background:transparent!important}.badge.core{color:#486640;border-color:#d1dbc7}.badge.difficult{color:#a3744e;border-color:#e5d7c4}.badge.confusing{color:#60818a;border-color:#cedbe0}.aside-priority{background:#eef1e6;border-radius:1px}.source-list li{border-color:#e7e9df}.site-footer{font-size:10px;padding-top:26px;gap:25px}.site-footer span:first-child{font:15px Georgia,serif;color:var(--green)}.atlas-hero{display:grid;grid-template-columns:1.18fr .82fr;gap:90px;padding:65px 0 48px;align-items:center;position:relative}.atlas-intro>.eyebrow{font-size:9px;letter-spacing:2.5px;color:#8b9586}.atlas-intro h1{font:52px/1.48 var(--serif);font-weight:500;letter-spacing:-1.8px;margin:20px 0}.atlas-intro h1 em{font-style:normal;color:#6e8266}.atlas-intro>p{font-size:13px;line-height:2.1;color:#7a8675;max-width:470px;margin-bottom:26px}.atlas-intro .row{gap:23px}.atlas-collections{border-top:1px solid #c9d1bf}.atlas-collection{display:grid;grid-template-columns:27px 1fr 25px;gap:18px;align-items:start;padding:29px 0;border-bottom:1px solid #cfd6c6;text-decoration:none;transition:padding .2s}.atlas-collection:hover{padding-left:8px;color:var(--green)}.atlas-collection>span:first-child{font:13px Georgia,serif;color:#94a087;padding-top:5px}.atlas-collection small{display:block;font:10px Georgia,serif;letter-spacing:1.8px;color:#8c9785;text-transform:uppercase}.atlas-collection h2{font:27px var(--serif);margin:10px 0 12px;font-weight:500}.atlas-collection p{font-size:11px;color:#7b8772;line-height:1.9;margin:0;max-width:275px}.atlas-collection>span:last-child{font:23px Georgia,serif;color:#809276;padding-top:23px}.atlas-collection:last-child{background:#edf0e7;margin:0 -20px;padding:29px 20px;border-color:transparent}.atlas-collection:last-child:hover{padding-left:28px}.atlas-circulation-line{display:flex;align-items:center;gap:15px;border-top:1px solid var(--line);padding:18px 0 22px;font:9px var(--sans);letter-spacing:1.5px;color:#8d9985}.atlas-circulation-line img{width:25px;height:25px;opacity:.65}.atlas-circulation-line span:last-child{margin-left:auto;letter-spacing:.3px;font-size:10px}.dashboard-strip{padding:23px 0;margin-bottom:48px;border-top:0;grid-template-columns:1.3fr 45px 1fr 1.2fr}.dashboard-strip h3{font-size:13px}.dashboard-strip p{color:#8b9483}.topic-grid{border-top:1px solid #cbd4c1;border-left:0;gap:0 32px}.topic-card{border-right:0;border-bottom:1px solid #dbe0d1;padding:27px 3px;gap:20px;background:none;min-height:188px}.topic-card:hover{background:none}.topic-index{font-size:22px;color:#a4b098}.topic-card h3{font-size:24px;margin:7px 0 12px;font-weight:500}.topic-card p{font-size:11px;line-height:1.95;margin-bottom:17px}.topic-card .eyebrow{font-size:8px;letter-spacing:1px}.topic-card small{color:#99a28d;font-size:9px}.topic-card h3 span{font-size:17px}.section-heading h2{font-size:30px;font-weight:500}.section-heading .eyebrow{font-size:9px;letter-spacing:1.6px}.study-method{border-radius:0;background:#edefe5;padding:32px;margin-top:38px}.study-method h2{font-size:27px;font-weight:500}.lesson-card{background:#fffefa;padding:25px;transition:border-color .2s}.lesson-card:hover{background:#fbfcf5;border-color:#a9ba9a}.lesson-card h3{font-size:23px;font-weight:500}.reading h1{font-weight:500}.reading-head{padding-bottom:33px}.reading-mode{font-size:10px}.reading-head .badges{margin-top:20px}.directory,.reader-aside{top:167px;max-height:calc(100vh - 182px)}.library-cover{padding:53px 0 36px;border-bottom:1px solid var(--line);margin-bottom:10px}.library-cover h1{font:53px/1.4 var(--serif);font-weight:500;margin:14px 0}.library-cover>p{font-size:13px;color:var(--muted);max-width:580px;line-height:2}.library-edition{font:11px Georgia,serif;color:#9aaa8d;letter-spacing:2px}.library-stats{display:flex;gap:35px;margin-top:27px;font-size:10px;color:#8a9780}.library-stats b{font:24px Georgia,serif;color:#64795c;margin-right:6px}.library-map{display:grid;grid-template-columns:repeat(3,1fr);gap:0 35px;margin-top:10px}.library-map>a{display:grid;grid-template-columns:27px 1fr 18px;gap:18px;padding:33px 0;border-bottom:1px solid var(--line);text-decoration:none}.library-number{font:22px Georgia,serif;color:#a3af96;padding-top:3px}.library-map h2{font-size:24px;font-weight:500;margin:10px 0 13px}.library-map small{font:9px Georgia,serif;letter-spacing:.8px;color:#8c9a81}.library-map p{font-size:11px;line-height:1.9;color:#7d8b74;margin:0}.library-map-arrow{font:20px Georgia,serif;color:#9aaa8a;padding-top:35px}.library-guide{background:#edefe5;padding:32px;margin-top:42px}.library-guide h2{font-size:26px;margin-bottom:25px;font-weight:500}.library-guide details{margin-top:25px;border-top:1px solid #d4dcc9;padding-top:15px;font-size:11px;color:#7f8e74}.library-guide details p{margin:12px 0 0;font-size:11px;line-height:2}.library-layout .directory .library-back{padding-left:0;margin-bottom:15px;font-size:10px}.library-layout .directory .library-chapter-link{padding:11px 9px;font-size:12px;display:flex;gap:15px;align-items:center;border-bottom:1px solid #e6eadf}.library-chapter-link>span{font:11px Georgia,serif;color:#9baa8f}.library-layout .directory a[aria-current=page]{border-left:2px solid #5a7951;padding-left:9px}.library-en{font:13px Georgia,serif;color:#88987b;letter-spacing:1px;margin:8px 0 21px}.library-hook{font-size:13px;line-height:2;color:#6c7f62;background:#edf0e7;padding:18px 20px;border-left:2px solid #9cae8b}.library-controls{margin-top:22px;gap:17px}.library-controls .small{font-size:9px}.library-filter{padding:22px 0;display:flex;align-items:center;gap:15px;flex-wrap:wrap;border-bottom:1px solid var(--line)}.library-filter label,.library-filter>span{font-size:10px;color:#859478}.library-filter select{font-size:11px}.library-questions{margin-top:23px;background:#fffdf7;border:1px solid #e0e5d6}.library-questions details{padding:15px 20px;border-bottom:1px solid #e7ebdf}.library-questions details:last-child{border:0}.library-questions summary{display:flex;gap:12px;cursor:pointer;font-size:12px;line-height:1.8}.library-questions summary>span{font:11px Georgia,serif;color:#a2b08e;flex-shrink:0;padding-top:5px}.library-questions p{font-size:12px;line-height:1.95;margin:15px 0 0;color:#728267}.library-section-title{font-size:26px;font-weight:500;margin:44px 0 22px;scroll-margin-top:170px}.library-block{font-size:13px;line-height:2;margin:20px 0;scroll-margin-top:175px}.library-block h3{font-size:16px;font-weight:600;line-height:1.9;margin:10px 0 12px}.library-block p{margin:9px 0}.library-block ul,.library-block ol{padding-left:22px;margin:12px 0}.library-block li{padding:3px 0}.library-key,.library-hard,.library-pit,.library-mn,.library-crit{padding:22px;border:1px solid #dce3d1;background:#fcfdf6}.library-key{border-left:2px solid #849c70}.library-hard{background:#f3efe4;border-color:#e7ddc9}.library-pit{background:#f8f1e8;border-color:#eaded0}.library-mn{background:#f2f2e5;border-color:#dedfc4}.library-tag{font-size:10px;line-height:1.4;letter-spacing:.5px;display:block;color:#8b9c77;margin-bottom:10px}.library-hard .library-tag{color:#b1986a}.library-pit .library-tag{color:#ae8a6a}.library-reason summary{font-size:11px;color:#9a8056;cursor:pointer;margin-top:10px}.library-reason[open] summary{border-bottom:1px solid #e6dcc8;padding-bottom:10px}.misconception{color:#a98b74;font-size:12px}.library-mnemonic{font:20px/1.9 var(--serif);font-weight:500}.library-block table{font-size:12px;min-width:540px}.library-block caption{font-size:12px;font-weight:600;background:#eef1e7;padding:13px 16px;border-bottom:1px solid #dce3d2}.library-table-note{font-size:10px!important;color:#8b997c;margin-top:9px!important;line-height:1.9}.library-ecg{background:#fffdfa}.library-ecg svg{display:block;min-width:720px;width:100%;height:auto}.library-revision{margin-top:17px;padding-top:10px;border-top:1px solid #e0e4d7;color:#98a28b;font-size:9px;line-height:1.9}.library-revision summary{cursor:pointer}.library-revision p{font-size:10px!important;color:#859477}.library-revision a{font-size:10px}.library-question{padding:23px 20px;margin:20px 0;background:#fffef9;border:1px solid #dce3d1;scroll-margin-top:170px}.library-question fieldset{border:0;padding:0;margin:15px 0 20px;display:grid;gap:9px}.library-question h3{font-size:15px;line-height:1.9}.library-question .eyebrow{font-size:9px;letter-spacing:.5px}.library-question .option{font-size:12px}.library-references{margin:35px 0 30px;border-top:1px solid var(--line);padding-top:30px}.library-references h2{font-size:26px;font-weight:500}.library-references p{font-size:12px;line-height:2;color:#7c8b70}.library-references code{font-size:10px}.library-references details{font-size:11px;margin-top:20px;padding:17px;background:#eef1e7}.reference-links{display:grid;border:1px solid var(--line);margin:18px 0}.reference-links>a{padding:14px 18px;border-bottom:1px solid var(--line);text-decoration:none}.reference-links>a:last-child{border:0}.reference-links b{font-size:12px;font-weight:500}.reference-links small{display:block;color:#92a080;font-size:9px;line-height:1.9;margin-top:4px}.library-review{margin:25px 0;background:#f4f6ee}.library-review h2{font-size:25px;font-weight:500;margin:6px 0 15px}.library-review>a:not(.text-link){display:flex;gap:15px;text-decoration:none;font-size:12px;border-bottom:1px solid var(--line);padding:13px 0}.library-review>a small{min-width:70px;color:#98a388;font-size:9px;padding-top:3px}.library-review>a span{flex:1}.library-review>a b{font-weight:400;font-size:10px;white-space:nowrap;padding-top:3px}.library-review .text-link{margin-top:15px}.search-source-label{color:#94a085!important;font-size:9px!important}.atlas-brand-source{margin:22px 0;padding:22px 25px;background:#edf0e6;border:1px solid #dce4d0}.atlas-brand-source h2{font-size:23px;font-weight:500}.atlas-brand-source p{font-size:12px;color:#798b6a}.atlas-brand-source a{font-size:11px}.library-reading strong{font-weight:600;color:#4d6c40}.library-reading mark{background:#eeedce;color:inherit}.library-reading .answer-panel strong{font-size:12px}.library-block .section-heading h2{font-size:27px}.library-block .table-scroll{border-color:#dde3d3}
@media(max-width:1150px){.atlas-hero{gap:60px}.header-bottom nav{gap:26px}.atlas-intro h1{font-size:47px}.atlas-collections{margin-left:15px}.atlas-collection{gap:11px}.atlas-collection h2{font-size:25px}.library-map{gap:0 25px}.library-map>a{gap:13px}.dashboard-strip{grid-template-columns:1.2fr 40px 1fr}.reader-aside{display:none}.atlas-intro>p{font-size:12px}}@media(max-width:800px){.header-top{height:auto;min-height:115px}.brand-mark{width:37px;height:37px}.brand-name{font-size:24px}.brand small{font-size:6px;letter-spacing:1.8px;margin-top:5px}.header-bottom nav{gap:23px}.header-bottom nav a{font-size:11px}.atlas-hero{gap:30px;padding:40px 0 35px;grid-template-columns:1.1fr .9fr}.atlas-intro h1{font-size:37px;letter-spacing:-1.2px}.atlas-intro>.eyebrow{font-size:8px;letter-spacing:1.2px}.atlas-intro>p{font-size:11px}.atlas-intro .row{gap:14px}.atlas-collection{padding:23px 0}.atlas-collection:last-child{padding:23px 15px;margin:0 -15px}.atlas-collection h2{font-size:23px}.atlas-collection small{font-size:8px}.atlas-collection p{font-size:10px}.atlas-circulation-line{font-size:8px;letter-spacing:.8px}.atlas-circulation-line span:last-child{font-size:8px}.topic-grid{gap:0 22px}.topic-card{padding:25px 2px}.topic-card h3{font-size:23px}.library-map{grid-template-columns:repeat(2,1fr);gap:0 25px}.library-map h2{font-size:25px}.library-cover h1{font-size:43px}.library-stats{gap:24px}.reader-aside{display:none}.library-layout .directory{display:none}.directory-open .library-layout .directory{display:block}.library-cover{padding-top:36px}.library-reading h1{font-size:34px}.library-section-title{font-size:25px}.library-map>a{padding:28px 0}}@media(max-width:520px){.brand{gap:8px}.brand-mark{width:33px;height:33px}.brand-name{font-size:22px;letter-spacing:-1px}.brand small{font-size:5px;letter-spacing:1.3px}.header-top{gap:13px;grid-template-columns:1fr auto}.mode-switch button{font-size:9px;padding:6px 7px}.header-bottom nav{gap:20px}.header-bottom nav a{font-size:11px}.header-bottom{height:44px}.atlas-hero{grid-template-columns:1fr;gap:32px;padding:36px 0 25px}.atlas-intro h1{font-size:40px;line-height:1.5;margin:18px 0 17px;letter-spacing:-1.4px}.atlas-intro>.eyebrow{font-size:8px;letter-spacing:1.8px}.atlas-intro>p{font-size:12px;line-height:2.1;margin-bottom:22px}.atlas-intro .row{gap:20px}.atlas-collections{margin-left:0}.atlas-collection{padding:23px 5px;grid-template-columns:23px 1fr 22px;gap:15px}.atlas-collection:last-child{margin:0 -10px;padding:25px 15px}.atlas-collection h2{font-size:24px;margin:8px 0 10px}.atlas-collection small{font-size:9px}.atlas-collection p{font-size:11px;max-width:270px}.atlas-collection>span:last-child{font-size:21px;padding-top:23px}.atlas-circulation-line{padding:15px 0 18px;gap:10px;letter-spacing:.4px;font-size:7px}.atlas-circulation-line span:last-child{display:none}.atlas-circulation-line img{width:22px;height:22px}.dashboard-strip{margin-bottom:35px;grid-template-columns:1fr 35px;gap:15px}.section-heading h2{font-size:25px}.topic-grid{grid-template-columns:1fr}.topic-card{padding:25px 0;min-height:0;gap:23px}.topic-card .eyebrow{font-size:8px}.topic-card h3{font-size:25px}.topic-card p{font-size:12px}.topic-card small{font-size:9px}.topic-index{font-size:24px}.study-method{padding:25px 23px}.study-method h2{font-size:25px}.library-cover h1{font-size:40px}.library-cover>p{font-size:12px}.library-edition{font-size:8px;letter-spacing:1px}.library-stats{gap:15px;flex-wrap:wrap;font-size:9px;margin-top:24px}.library-stats b{font-size:22px;margin-right:4px}.library-map{grid-template-columns:1fr;gap:0}.library-map>a{grid-template-columns:27px 1fr 20px;gap:20px;padding:27px 0}.library-map h2{font-size:26px}.library-map small{font-size:10px}.library-map p{font-size:12px}.library-guide{padding:25px 23px;margin-top:30px}.library-guide h2{font-size:25px}.library-reading h1{font-size:33px}.library-en{font-size:12px}.library-hook{font-size:12px;padding:17px}.library-controls{gap:12px}.library-controls .small{flex-basis:100%}.library-questions details{padding:15px}.library-questions summary{font-size:12px}.library-key,.library-hard,.library-pit,.library-mn,.library-crit{padding:19px 17px}.library-block{font-size:13px}.library-section-title{font-size:24px;line-height:1.7;margin-top:32px;scroll-margin-top:185px}.library-block,.library-question{scroll-margin-top:190px}.library-question{padding:19px 14px}.library-question h3{font-size:14px}.library-question .option{font-size:12px}.library-question .answer-panel{padding:15px}.library-review>a:not(.text-link){display:grid;grid-template-columns:1fr auto;gap:4px 10px}.library-review>a small{grid-column:1 / -1}.library-review h2{font-size:24px}.page-head h1{font-size:29px}.atlas-brand-source{padding:20px}.library-mnemonic{font-size:20px}.library-block table{font-size:11px;min-width:510px}html{scroll-padding-top:180px}}
@media(prefers-reduced-motion:reduce){.atlas-collection{transition:none}}@media print{.library-filter,.library-controls,.library-revision,.library-question button,.library-question input,.library-layout .directory{display:none!important}.library-questions details{break-inside:avoid}.library-content details:not([open])>p{display:block}.library-block{break-inside:avoid}.library-content .table-scroll{overflow:visible}.library-content table{min-width:0}}

.nav-short{display:none}@media(max-width:520px){.nav-full{display:none}.nav-short{display:inline}.header-bottom nav{width:100%;justify-content:space-between;gap:17px}}

html{scroll-padding-top:0}.one-sentence{scroll-margin-top:170px}@media(max-width:520px){.one-sentence{scroll-margin-top:185px}}

.library-hook{color:#627456}.library-references p{color:#66785e}.atlas-intro>p{color:#6d7c64}.atlas-collection p{color:#6c7b63}

/* Home: a cutaway heart between the introduction and learning collections. */
.atlas-hero{grid-template-columns:minmax(0,1.06fr) minmax(220px,.8fr) minmax(280px,.93fr);gap:30px}
.atlas-intro{min-width:0}
.atlas-heart{position:relative;display:grid;place-items:center;align-self:center;min-width:0;margin:0;padding:15px 5px 31px;text-decoration:none;color:#8d9b80}
.atlas-heart img{position:relative;z-index:1;display:block;width:100%;max-width:290px;height:auto;max-height:340px;object-fit:contain;transform:rotate(-7deg);filter:drop-shadow(0 15px 18px #29462e0b)}
.atlas-heart-orbit{position:absolute;inset:13% 0 14%;border:1px solid #dfe5d63b;border-radius:50%;background:radial-gradient(ellipse,#e8edde4a,transparent 72%);transform:none;pointer-events:none}
.atlas-heart-caption{font-size:9px;letter-spacing:.5px;position:absolute;bottom:1px;left:0;right:0;text-align:center;color:#8a9b7b;text-underline-offset:4px}
.atlas-heart:hover .atlas-heart-caption{text-decoration:underline;color:var(--green)}
@media(min-width:1440px){.atlas-hero{gap:36px}.atlas-heart img{max-width:315px;max-height:365px}}
@media(min-width:1100px) and (max-width:1200px){.atlas-hero{gap:23px}.atlas-intro h1{font-size:43px}.atlas-heart img{max-height:310px}.atlas-collections{margin-left:0}.atlas-collection h2{font-size:24px}.atlas-collection p{font-size:10px}}
@media(min-width:761px) and (max-width:1099px){.atlas-hero{grid-template-columns:1.1fr .9fr;gap:28px 42px}.atlas-intro{grid-column:1;grid-row:1}.atlas-heart{grid-column:2;grid-row:1;padding-bottom:25px}.atlas-heart img{max-width:270px;max-height:315px}.atlas-collections{grid-column:1 / -1;grid-row:2;display:grid;grid-template-columns:1fr 1fr;gap:28px;margin:10px 0 0;border:0}.atlas-collection{padding:24px 0;border-top:1px solid #c9d1bf;border-bottom:0}.atlas-collection:last-child{margin:0;padding:24px 20px}.atlas-collection p{max-width:none}.atlas-collection:hover{padding-left:5px}.atlas-collection:last-child:hover{padding-left:25px}}
@media(max-width:760px){.atlas-hero{grid-template-columns:1fr;gap:26px;padding-bottom:30px}.atlas-intro,.atlas-heart,.atlas-collections{grid-column:1;grid-row:auto}.atlas-heart{width:min(100%,300px);justify-self:center;padding:7px 20px 28px}.atlas-heart img{max-width:245px;max-height:285px}.atlas-heart-orbit{inset:8% 0 15%}.atlas-heart-caption{font-size:9px}.atlas-collections{display:block;margin:0;border-top:1px solid #c9d1bf}.atlas-collection{border-top:0}.atlas-collection:last-child{margin:0 -10px;padding:25px 15px}}