/* Entry-only composition. Learning controls retain their existing styles. */
@font-face{font-family:'Akalmatika Latin Modern Roman';font-style:normal;font-weight:700;font-display:swap;src:url('vendor/latin-modern/lmroman10-bold.otf') format('opentype')}
.a-header nav a{min-width:44px;justify-content:center}
.a-unit-preview{display:block;width:100%;height:auto;overflow:visible;fill:#3a627a;stroke:#b4d9ec;stroke-width:2}.a-unit-preview text{fill:var(--color-text);stroke:none;font-size:18px;font-family:inherit}.a-unit-preview .a-preview-empty{fill:none}.a-unit-preview .a-preview-selected{fill:#78b3cf}.a-unit-preview .a-preview-origin{fill:var(--color-text);stroke:none}
.a-header.c-header{height:82px;max-width:1160px;margin:auto;padding:0 30px;border-bottom:1px solid var(--color-line);background:transparent;gap:24px}.a-header .a-brand{display:flex;align-items:center;min-height:44px;color:var(--color-text)}.a-brand-wordmark{font-size:25px;letter-spacing:-.7px}.a-header .a-brand img{display:block;width:220px;height:auto;max-height:52px;object-fit:contain}.a-header nav{gap:16px}.a-header nav a{font-size:14px;min-height:44px;padding:10px 4px;border-radius:0;border-bottom:2px solid transparent}.a-header nav a[aria-current=page]{color:var(--color-text);background:transparent;border-bottom-color:var(--color-selection)}
.a-entry.c-home,.a-entry.c-curriculum{width:100%;max-width:1160px;margin:0 auto;padding:0 30px 48px;color:var(--color-text)}.a-entry a,.a-entry button,.a-header a,.a-footer a{-webkit-tap-highlight-color:transparent}.a-entry :is(a,button,summary):focus-visible,.a-header a:focus-visible,.a-footer a:focus-visible{outline:3px solid #b6e8ff;outline-offset:4px}.a-entry [hidden]{display:none!important}
.a-hero{display:grid;grid-template-columns:1.07fr 1fr;align-items:center;gap:68px;padding:62px 0 66px}.a-eyebrow{font-size:11px;letter-spacing:1.4px;font-weight:650;line-height:1.6;color:var(--color-muted);margin:0 0 18px}.a-hero h1{font-size:56px;letter-spacing:-1.9px;line-height:1.08;font-weight:650;margin:0 0 23px}.a-lead{font-size:17px;line-height:1.65;max-width:430px;color:var(--color-muted)}.a-main-action.c-home-actions{margin-top:28px;display:block}.a-main-action .primary{display:inline-flex;align-items:center;justify-content:space-between;gap:40px;min-height:52px;min-width:210px;background:#b5e6fc;border:2px solid #b5e6fc;border-radius:10px;color:#14232d;padding:13px 20px;font-size:15px;font-weight:650;text-decoration:none;box-shadow:none;transform:none}.a-main-action .primary:hover{background:#d0f0ff;border-color:#d0f0ff}.a-resume-title{max-width:430px;font-size:13px;line-height:1.6;color:var(--color-text);margin-top:18px}.a-resume-position{font-size:12px;color:var(--color-muted);margin-top:3px}
.a-example{border:1px solid var(--color-line);border-radius:18px;background:#1b2630;overflow:visible;padding:22px 24px 16px;min-width:0}.a-example-top{display:flex;justify-content:space-between;gap:14px;align-items:center}.a-example-top .a-eyebrow{margin:0;font-size:10px;letter-spacing:1px}.a-example-top>span{font-size:11px;color:var(--color-muted)}.a-example-question{min-height:225px;display:flex;flex-direction:column;justify-content:center;align-items:center;text-align:center;padding:22px 0 18px}.a-example-question h2{font-size:20px;line-height:1.4;min-height:56px;display:flex;align-items:center;justify-content:center;max-width:350px;margin:0}.a-example-math{font-size:38px;min-height:90px;display:flex;align-items:center;justify-content:center;width:100%;padding:10px 0}.a-example-question>p{font-size:12px;line-height:1.6;color:var(--color-muted);margin-top:4px}.a-process{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;list-style:none;margin:0;padding:18px 0 4px;border-top:1px solid var(--color-line)}.a-process>li{position:relative;min-width:0;display:flex;flex-direction:column;align-items:center;gap:10px;text-align:center}.a-process-number{display:flex;align-items:center;justify-content:center;width:28px;height:28px;border:1px solid #90bfd6;border-radius:50%;color:#d8edf7;font-size:12px;font-weight:650;background:#223644}.a-process-content{min-width:0}.a-process-content strong{display:block;font-size:11px;font-weight:600;line-height:1.5;color:var(--color-text)}.a-process-content>p{font-size:10px;line-height:1.6;color:var(--color-muted);margin:5px 0 0;min-height:32px}.a-process-content .math-notation{font-size:18px}
.a-example-link{display:flex;align-items:center;justify-content:center;gap:18px;min-height:44px;font-size:12px;color:#bbdff0;margin-top:8px}
.a-page-heading{padding:44px 0 16px}.a-page-heading .a-eyebrow{margin-bottom:10px}.a-page-heading h1{font-size:42px;line-height:1.2;letter-spacing:-1px;margin:0 0 12px}.a-page-heading>p:last-of-type{font-size:15px;line-height:1.65;color:var(--color-muted)}.a-catalog-resume{display:inline-flex;align-items:center;gap:16px;min-height:44px;color:#c4e8fa;font-size:13px;margin-top:14px}
.a-catalog{border-top:1px solid var(--color-line);padding-top:34px;scroll-margin-top:24px}.a-learning .a-catalog{border-top:0;padding-top:18px}.a-catalog-heading{display:flex;justify-content:space-between;align-items:flex-end;gap:32px;margin-bottom:25px}.a-catalog-heading .a-eyebrow{font-size:10px;margin-bottom:8px}.a-catalog-heading h2{font-size:27px;line-height:1.25;letter-spacing:-.6px;margin:0}.a-catalog-heading>p{max-width:260px;font-size:13px;line-height:1.6;color:var(--color-muted);margin:0 0 1px}.a-level-tabs{display:flex;gap:8px;padding:0 0 18px}.a-level-tabs button{min-width:94px;min-height:48px;padding:10px 22px;border:2px solid var(--color-line);border-radius:9px;background:transparent;color:var(--color-muted);font-size:15px;font-weight:600}.a-level-tabs button[aria-selected=true]{border-color:#8bd7f8;color:var(--color-text);background:#22333f}.a-level-panel:focus-visible{outline:2px solid #b6e8ff;outline-offset:5px}.a-discipline{border-top:1px solid var(--color-line)}.a-discipline>summary{display:flex;align-items:center;gap:18px;cursor:pointer;list-style:none;min-height:72px;padding:18px 4px;color:var(--color-text)}.a-discipline>summary::-webkit-details-marker{display:none}.a-discipline>summary>span:first-child{font-size:20px;font-weight:550}.a-discipline>summary>small{font-size:12px;color:var(--color-muted);margin-left:auto}.a-disclosure{font-size:24px;line-height:1;width:28px;text-align:center}.a-discipline[open]>summary .a-disclosure{font-size:0}.a-discipline[open]>summary .a-disclosure::after{content:'−';font-size:24px}.a-available-topics{padding:0 0 24px}.a-subtopic+.a-subtopic{margin-top:24px}.a-subtopic-title{font-size:13px;font-weight:450;line-height:1.65;color:var(--color-muted);margin:0 0 14px;max-width:840px}.a-card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
.a-learning-card{display:grid;grid-template-rows:20px minmax(56px,auto) 142px minmax(44px,auto) 44px;min-width:0;gap:9px;align-content:start;padding:20px 20px 12px;border:2px solid #3d515f;border-radius:14px;background:#1e2a34;color:var(--color-text);text-decoration:none}.a-learning-card:hover{border-color:#90cce7;background:#21323e}.a-learning-card .a-card-context{font-size:10px;letter-spacing:.3px;color:var(--color-muted);margin:0}.a-learning-card h3{font-size:17px;font-weight:550;line-height:1.45;margin:0;overflow-wrap:anywhere}.a-card-visual{position:relative;min-width:0;width:100%;height:142px;overflow:hidden;font-size:26px}.a-preview-content{position:absolute;top:50%;left:50%;transform-origin:center;text-align:center}.a-preview-content .c-primary-visual{width:100%;max-width:none;margin:0;padding:8px;border:0;background:transparent}.a-preview-content .c-primary-visual figcaption{font-size:12px;line-height:1.45;margin-top:8px}.a-preview-content .c-pattern-model-tile{width:68px;min-width:0}.a-preview-content .c-pattern-model-tile svg{width:38px;height:38px}.a-card-caption{font-size:12px;line-height:1.6;color:var(--color-muted);margin:0;overflow-wrap:anywhere}.a-card-action{display:flex;align-items:center;justify-content:space-between;gap:16px;border-top:1px solid #3d515f;padding-top:4px;font-size:13px;color:#c5e9fa}.a-card-action>span{font-size:18px}
.a-planned{margin-top:14px;border-top:1px solid var(--color-line);color:var(--color-muted)}.a-planned>summary{min-height:56px;padding:17px 4px;cursor:pointer;font-size:13px;line-height:1.6}.a-planned>summary>span{font-size:11px;margin-left:8px}.a-planned>section{padding:8px 0 18px}.a-planned h3{font-size:17px;margin:14px 0}.a-planned h4{font-size:13px;margin:20px 0 12px;color:var(--color-text)}.a-planned ul{list-style:none;margin:0;padding:0}.a-planned li{padding:12px 0;border-bottom:1px solid #344754;font-size:13px;line-height:1.7}.a-planned li>small{display:block;color:#c1d9e7;font-size:11px;margin-top:5px}.a-empty{padding:16px 0 25px;max-width:520px;line-height:1.7;color:var(--color-muted);font-size:14px}.a-catalog-links{display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px 24px;border-top:1px solid var(--color-line);padding-top:18px;margin-top:12px}.a-catalog-links a{min-height:44px;display:flex;align-items:center;gap:18px;color:var(--color-muted);font-size:12px;line-height:1.6;margin:0}.a-catalog-links a:hover{color:var(--color-text)}.a-footer{max-width:1100px;margin:auto;padding:24px 0 30px;border-top:1px solid var(--color-line);display:flex;align-items:center;justify-content:space-between;gap:16px;font-size:11px;color:var(--color-muted)}.a-footer a{min-height:44px;display:flex;align-items:center;color:var(--color-muted)}
@media(max-width:1000px){.a-hero{gap:36px}.a-hero h1{font-size:45px}.a-card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.a-example{padding-inline:18px}.a-footer{margin-inline:30px}}
@media(max-width:680px){.a-header.c-header{height:66px;margin-inline:20px;padding-inline:0;gap:20px}.a-header .a-brand img{width:160px;max-height:44px}.a-brand-wordmark{font-size:22px}.a-header nav{gap:14px}.a-header nav a{font-size:12px;min-height:44px;padding-inline:0}.a-entry.c-home,.a-entry.c-curriculum{padding:0 20px 32px}.a-hero{grid-template-columns:1fr;gap:28px;padding:32px 0 34px}.a-hero .a-eyebrow{font-size:10px;margin-bottom:14px}.a-hero h1{font-size:37px;letter-spacing:-1.1px;line-height:1.1;margin-bottom:17px}.a-lead{font-size:15px;line-height:1.65;max-width:330px}.a-main-action.c-home-actions{margin-top:22px}.a-main-action .primary{min-width:210px;font-size:14px;gap:32px;width:auto}.a-example{padding:16px 16px 10px;border-radius:14px}.a-example-top .a-eyebrow{font-size:8px;letter-spacing:.8px;margin:0}.a-example-top>span{font-size:10px}.a-example-question{min-height:210px;padding:18px 0 14px}.a-example-question h2{font-size:18px;min-height:48px}.a-example-math{font-size:33px;min-height:76px}.a-example-question>p{font-size:11px}.a-process{grid-template-columns:1fr;gap:20px;padding-top:18px}.a-process>li{flex-direction:row;align-items:flex-start;text-align:left;gap:14px}.a-process-number{flex-shrink:0}.a-process-content strong{font-size:13px}.a-process-content>p{font-size:11px;min-height:0;margin-top:3px}.a-process-content .math-notation{font-size:18px}.a-example-link{font-size:11px}.a-catalog{padding-top:25px}.a-catalog-heading{display:block;margin-bottom:20px}.a-catalog-heading h2{font-size:25px}.a-catalog-heading>p{margin-top:12px;max-width:320px;font-size:13px}.a-level-tabs{gap:8px;padding-bottom:16px}.a-level-tabs button{min-width:0;flex:1;min-height:48px;padding-inline:14px;font-size:14px}.a-discipline>summary{min-height:66px;gap:10px;padding-block:16px}.a-discipline>summary>span:first-child{font-size:18px}.a-discipline>summary>small{font-size:10px}.a-card-grid{grid-template-columns:minmax(0,1fr);gap:12px}.a-subtopic-title{font-size:12px}.a-learning-card{grid-template-rows:18px minmax(46px,auto) 132px minmax(38px,auto) 44px;padding:16px 16px 8px;gap:8px}.a-learning-card h3{font-size:16px}.a-card-visual{height:132px;font-size:25px}.a-card-caption{font-size:11px}.a-page-heading{padding-top:30px}.a-page-heading h1{font-size:33px}.a-page-heading>p:last-of-type{font-size:14px}.a-catalog-resume{font-size:12px}.a-planned>summary{font-size:12px}.a-planned>summary>span{display:block;margin-left:18px}.a-footer{margin-inline:20px;padding-block:18px 24px;align-items:flex-start;flex-direction:column;gap:6px}.a-footer a{min-height:44px}.a-catalog-links{display:block}.a-catalog-links a{font-size:11px}.a-resume-title{font-size:12px}}
@media(prefers-reduced-motion:reduce){.a-entry *,.a-header *{scroll-behavior:auto!important;transition:none!important;animation:none!important}}
.a-available-topics{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.a-available-topics>.a-subtopic,.a-available-topics>.a-subtopic>.a-card-grid{display:contents}.a-available-topics>.a-subtopic>.a-subtopic-title{display:none}@media(max-width:1000px){.a-available-topics{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:680px){.a-available-topics{grid-template-columns:minmax(0,1fr);gap:12px}}

/* Saved position is a quiet, conditional notice with one real resume action. */
.a-resume{max-width:430px;margin-top:24px;padding:15px 17px 8px;border:1px solid #4b6372;border-left:3px solid #90bfd6;border-radius:9px;background:#1b2933;min-width:0}.a-resume-label{font-size:11px;line-height:1.5;color:var(--color-muted);margin:0 0 9px}.a-resume .a-resume-title{font-size:16px;font-weight:500;line-height:1.5;letter-spacing:normal;margin:0;color:var(--color-text);min-height:0}.a-resume-formula{max-width:100%;overflow-x:auto;overflow-y:hidden;padding:8px 0;font-size:18px;line-height:1.7}.a-resume-formula:focus-visible{outline:2px solid #b6e8ff;outline-offset:2px}.a-resume-formula .math-notation{white-space:nowrap}.a-resume-position{font-size:12px;line-height:1.6;margin:7px 0 3px}.a-resume-link,.a-resume-link.primary{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:44px;min-width:44px;padding:7px 0;background:transparent;border:0;border-radius:0;color:#c5e9fa;font-size:13px;font-weight:600;text-decoration:none;box-shadow:none;transform:none}.a-resume-link:hover,.a-resume-link.primary:hover{background:transparent;color:#eef9ff}.a-resume-link>span{font-size:18px}.a-page-heading .a-resume{margin-bottom:18px}.a-discipline>.a-planned{margin:0 0 20px 4px;padding-left:16px;border-top:0;border-left:1px solid #4b6372}.a-discipline>.a-planned>summary{padding-left:0}.a-planned>section{padding-right:10px}.a-planned h3{font-size:14px}.a-planned h4{font-size:12px}.a-discipline>summary>span:first-child{overflow-wrap:anywhere}.a-discipline>summary>small{flex-shrink:0}
@media(max-width:680px){.a-resume{margin-top:20px;padding:13px 14px 6px}.a-resume .a-resume-title{font-size:15px}.a-example-question{min-height:180px}.a-example-question h2{min-height:26px}.a-example-math{min-height:68px}.a-discipline>summary>small{max-width:96px;text-align:right;line-height:1.6}.a-discipline>.a-planned{padding-left:12px}}

/* Each connector is one SVG path: shaft and head share their exact endpoint. */
.a-process-arrow{position:absolute;overflow:visible;visibility:hidden;pointer-events:none;fill:none;stroke:#90bfd6;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round}
.a-catalog-controls{position:sticky;top:0;z-index:4;padding:10px 0 12px;background:var(--color-bg,#15191d);border-bottom:1px solid var(--color-line);margin-bottom:8px}.a-catalog-controls .a-level-tabs{padding-bottom:10px}.a-family-picker{display:flex;align-items:center;gap:14px;color:var(--color-muted);font-size:13px}.a-family-picker>span{flex:0 0 32px}.a-family-picker select{min-height:44px;width:100%;min-width:0;border:1px solid #587587;border-radius:8px;padding:8px 12px;background:#1e2a34;color:var(--color-text);font:inherit;font-size:15px}.a-family-picker select:focus-visible{outline:3px solid #b6e8ff;outline-offset:3px}.a-discipline[hidden]{display:none!important}.a-discipline>summary{min-height:60px;padding-block:14px}.a-available-topics{grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.a-learning-card{display:flex;flex-direction:column;justify-content:space-between;align-items:stretch;height:136px;min-width:0;width:100%;margin:0;padding:10px 12px;gap:4px;border:1px solid #4a6474;border-radius:10px;background:#1e2a34;color:var(--color-text);font:inherit;text-align:left;white-space:normal;box-shadow:none;transform:none}.a-learning-card:hover{border-color:#b0d8ec;background:#243642;transform:none}.a-tile-kind{font-size:12px;line-height:1.3;color:#b6c9d6}.a-tile-main{display:flex;flex:1;min-height:0;min-width:0;flex-direction:column;justify-content:center;gap:3px}.a-tile-title{font-size:16px;line-height:1.32;font-weight:600;overflow-wrap:normal;word-break:normal}.a-tile-formula{visibility:hidden;display:block;min-width:0;max-width:100%;font-size:18px;line-height:1.35;white-space:nowrap}.a-tile-detail{display:flex;align-items:center;justify-content:space-between;color:#c5e9fa;font-size:12px;line-height:1.4}.a-tile-detail>span{font-size:18px;line-height:1}.a-learning-card{scroll-margin-top:150px}
.a-card-dialog{width:calc(100% - 24px);max-width:520px;max-height:88svh;padding:20px;border:1px solid #7398ad;border-radius:14px;background:#202e39;color:var(--color-text);overflow:auto;overscroll-behavior:contain}.a-card-dialog::backdrop{background:#050b10c7}.a-detail-close{position:sticky;top:0;float:right;z-index:2;min-width:44px;min-height:44px;margin:-8px -8px 2px 8px;border:1px solid #587587;border-radius:9px;background:#202e39;color:var(--color-text);font-size:26px;line-height:1}.a-detail-body h2{font-size:22px;line-height:1.35;margin:10px 0 18px;overflow-wrap:anywhere}.a-detail-body>p{font-size:16px;line-height:1.65;margin:12px 0}.a-detail-body>.a-detail-kind{font-size:12px;color:var(--color-muted);margin-top:0}.a-detail-math{clear:both;max-width:100%;overflow:auto;font-size:24px;line-height:2;padding:12px 3px;margin:18px 0}.a-detail-math .math-notation{white-space:nowrap}.a-detail-math:focus-visible{outline:2px solid #b6e8ff;outline-offset:2px}.a-detail-body .a-card-visual{height:152px;margin:16px 0}.a-detail-body>.a-detail-domain{font-size:14px;color:var(--color-muted)}.a-detail-start.primary{clear:both;display:flex;align-items:center;justify-content:space-between;min-height:48px;gap:16px;padding:12px 16px;margin-top:18px;border-radius:8px;background:#b5e6fc;color:#14232d;font-size:15px;font-weight:600;text-decoration:none}.a-detail-start:focus-visible,.a-detail-close:focus-visible{outline:3px solid #b6e8ff;outline-offset:3px}
@media(max-width:680px){.a-entry.c-home,.a-entry.c-curriculum{padding-inline:16px}.a-catalog-controls{padding-top:8px;padding-bottom:10px}.a-catalog-controls .a-level-tabs{gap:6px;padding-bottom:8px}.a-catalog-controls .a-level-tabs button{min-height:44px;padding:8px}.a-family-picker{gap:8px}.a-family-picker>span{flex-basis:28px}.a-family-picker select{font-size:14px}.a-available-topics{grid-template-columns:repeat(3,minmax(0,1fr));gap:6px}.a-learning-card{height:136px;padding:8px 7px;border-radius:8px}.a-tile-title{font-size:14px;line-height:1.32}.a-tile-kind{font-size:11px}.a-tile-detail{font-size:12px}.a-discipline>summary{min-height:56px;padding:12px 0}.a-page-heading{padding-top:25px;padding-bottom:6px}.a-page-heading h1{font-size:29px;margin-bottom:10px}.a-learning .a-catalog-heading{display:none}.a-learning .a-catalog{padding-top:8px}.a-card-dialog{padding:16px}.a-detail-body h2{font-size:20px}.a-detail-math{font-size:22px}}

/* Reviewed question previews remain visible at every supported card width. */
.a-learning-card{height:216px;padding:10px 12px;gap:6px}.a-tile-title{flex:0 0 30px;font-size:12px;line-height:1.4;font-weight:550}.a-tile-title>span{background:#314b5b;color:#dcf1fc;border-radius:3px;padding:2px 4px;box-decoration-break:clone;-webkit-box-decoration-break:clone}.a-tile-main{justify-content:flex-start;gap:4px}.a-tile-prompt{min-height:30px;font-size:11px;line-height:1.35;color:#e3edf3}.a-tile-formula{display:flex;flex:1;flex-direction:column;justify-content:center;align-items:center;gap:0;font-size:17px;line-height:1.4;white-space:normal}.a-preview-line{display:block;white-space:nowrap;line-height:1.4}.a-preview-unit{font-size:11px;line-height:1.4}.a-tile-footer{display:flex;align-items:center;justify-content:space-between;gap:3px}.a-tile-kind{font-size:10px;line-height:1.4}.a-tile-detail{font-size:10px;gap:4px;line-height:1.4}.a-tile-detail>span{font-size:13px}.a-unit-goal{margin-block:auto;font-size:13px;line-height:1.5;color:#e3edf3}
@media(max-width:680px){.a-learning-card{padding:9px 7px}.a-tile-title{font-size:11px}.a-tile-kind,.a-tile-detail{font-size:9px}}

/* Reviewed compact phone catalog cards; web contract v1.3.1. */
.a-preview-group{display:inline-flex;align-items:center;gap:3px;white-space:nowrap}
@media(max-width:680px){.a-available-topics{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}.a-learning-card{height:120px;padding:7px;gap:3px}.a-tile-title{flex-basis:14px;font-size:10px;line-height:1.3}.a-tile-main{gap:3px}.a-tile-prompt{min-height:0;font-size:11px;line-height:1.35}.a-tile-formula{flex-direction:row;flex-wrap:wrap;align-content:center;align-items:center;column-gap:4px;row-gap:2px}.a-preview-unit{font-size:11.5px}.a-tile-kind,.a-tile-detail{font-size:9px;line-height:1.3}.a-unit-goal{font-size:12px;line-height:1.4}}

/* Continuous chapter sections share the page scroll and yield their sticky title. */
.a-catalog-controls{margin-bottom:0;padding-bottom:8px}.a-catalog-controls .a-level-tabs{padding-bottom:0}
.a-discipline{position:relative;overflow:visible;scroll-margin-top:var(--a-controls-height,71px)}
.a-discipline>summary{position:sticky;top:var(--a-controls-height,71px);z-index:3;background:var(--color-bg,#15191d);border-bottom:1px solid transparent}
.a-discipline[open]>summary{border-bottom-color:var(--color-line);margin-bottom:8px}
.a-learning-card{scroll-margin-top:calc(var(--a-controls-height,71px) + 68px)}
@media(max-width:680px){.a-discipline>summary{top:var(--a-controls-height,61px)}.a-catalog-controls{padding-bottom:8px}}

/* Catalog questions keep a separate, explicit planned-lesson state. */
.a-question-topics{padding-bottom:24px}.a-question-phase h3{font-size:14px;margin:24px 0 6px}.a-question-phase h4{font-size:12px;color:var(--color-muted);margin:10px 0}.a-question-phase-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.a-question-phase-grid>.a-subtopic,.a-question-phase-grid .a-card-grid{display:contents}.a-question-phase-grid .a-subtopic-title{display:none}.a-question-alignment{grid-column:1/-1;font-size:12px;line-height:1.6;color:#bdced8;margin:4px 0}.a-question-card .a-tile-title{flex-basis:auto}.a-question-card .a-tile-formula{flex-direction:column;flex-wrap:nowrap;justify-content:center;min-height:0}.a-question-mini-model{display:block;min-height:0;flex:1;text-align:center}.a-question-mini-model .a-question-svg{height:100%;max-height:110px;width:100%;display:block}.a-question-svg{display:block;max-width:100%;width:100%;height:auto;fill:#395a6c;stroke:#b6d9eb;stroke-width:2;stroke-linejoin:round}.a-question-svg text{font:16px system-ui,sans-serif;fill:#edf7fc;stroke:none}.a-question-svg .a-fruit-label{font-size:13px}.a-question-svg .a-empty-model{fill:none}.a-question-svg .a-face-side{fill:#213e4e}.a-question-svg .a-face-top{fill:#52788d}.a-question-svg .a-start-cell{fill:#416e84}.a-question-model{clear:both;margin:16px 0}.a-question-model:empty{display:none}.a-model-descriptions{padding-left:20px;font-size:14px;line-height:1.7}.a-question-table{width:100%;border-collapse:collapse;font-size:14px}.a-question-table th,.a-question-table td{padding:8px;border:1px solid #6e91a5;text-align:left}.a-question-table tbody th{font-weight:400}.a-detail-body .a-lesson-unavailable{padding:12px;border-left:3px solid #83acc3;background:#192733;font-size:14px}.a-question-card .a-tile-formula{font-size:17px}
@media(max-width:680px){.a-question-phase-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}.a-question-card .a-tile-title{font-size:10px}.a-question-mini-model .a-question-svg{max-height:54px}.a-question-card .a-tile-formula{flex-direction:row;flex-wrap:wrap;gap:0 4px}.a-question-card .a-preview-line{line-height:1.35}}
.a-question-mini-model .a-question-table{font-size:10px;line-height:1.1}.a-question-mini-model .a-question-table th,.a-question-mini-model .a-question-table td{padding:1px 3px}.a-question-mini-model .a-question-table thead{display:none}

/* Reviewed v4: one title highlight contains all lines; footer owns its zone. */
.a-learning-card{display:grid;grid-template-columns:minmax(0,1fr);grid-template-rows:auto minmax(0,1fr) auto;justify-content:stretch;gap:5px}
.a-learning-card .a-tile-title{font-family:'Akalmatika Latin Modern Roman',serif;font-weight:700;font-style:normal;font-size:9px;min-height:0;line-height:1.35}
.a-learning-card .a-tile-title>span{display:inline-block;max-width:100%;background:#365f78;color:#fff;box-shadow:inset 2px 0 0 #a3defa;padding:1.5px 5px 1.5px 6px;line-height:1.35;box-decoration-break:slice;-webkit-box-decoration-break:slice;vertical-align:top}
.a-learning-card .a-tile-title .katex{font-size:1em}
.a-learning-card .a-tile-prompt{font-size:9.5px;line-height:1.35;padding-top:1px;flex:none}
.a-learning-card .a-tile-prompt .katex,.a-learning-card .a-unit-goal .katex{font-size:1.1em}
.a-learning-card .a-inline-math{white-space:nowrap}
.a-learning-card .a-unit-goal{font-size:10.5px}
.a-learning-card .a-tile-formula{font-size:15.5px;padding-top:1px}
.a-learning-card .a-preview-unit{font-size:10px}
.a-learning-card .a-tile-kind,.a-learning-card .a-tile-detail{font-size:8px;line-height:1.35}
.a-learning-card .a-tile-detail>span{font-size:11px}
.a-learning-card .a-tile-footer{min-height:12px;align-self:end;align-items:center}
.a-learning-card .a-question-table{font-size:8.5px}
.a-learning-card .a-question-svg text{font-size:14px}
.a-learning-card .a-question-svg .a-fruit-label{font-size:11px}
.a-learning-card .a-tile-main{display:flex;flex-direction:column;justify-content:flex-start;gap:3px}
.a-learning-card .a-question-mini-model{min-height:0}
/* Icon-only contacts share the existing header and keyboard focus treatment. */
.a-contacts{display:flex;align-items:center;flex:none;gap:0}
.a-header .a-contact{display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;min-width:44px;min-height:44px;padding:0;color:var(--color-muted);background:transparent;text-decoration:none}
.a-contact svg{width:16px;height:16px;flex:none;fill:none;stroke:currentColor;stroke-width:1.6}
.a-instagram .a-instagram-dot{fill:currentColor;stroke:none}
.a-header .a-contact:hover{color:var(--color-text)}
@media(max-width:680px){.a-header.c-header{display:grid;grid-template-columns:minmax(72px,1fr) auto auto;gap:8px;margin-inline:16px}.a-header .a-brand{min-width:0}.a-header .a-brand img{width:100%;max-width:160px}.a-header nav{gap:6px}}

/* The new book link uses a second navigation row on narrow screens. */
@media(max-width:680px){.a-header.c-header.a-book-nav{grid-template-columns:minmax(72px,1fr) auto;height:auto;min-height:66px;padding-block:8px;gap:4px 8px}.a-book-nav .a-brand{grid-column:1;grid-row:1}.a-book-nav .a-contacts{grid-column:2;grid-row:1}.a-book-nav nav{grid-column:1/-1;grid-row:2;order:3;width:100%;justify-content:center;flex-wrap:wrap;gap:12px}.a-book-nav nav a{flex:0 1 auto}}

/* ===== Struktur situs: menu empat ruang, kartu ruang belajar, footer, Tentang (2026-10) ===== */
.a-site-nav{display:flex;align-items:center}
.a-site-nav a{white-space:nowrap}
@media(max-width:680px){
 .a-header.c-header.a-book-nav .a-site-nav{grid-column:1/-1;order:3;display:flex;gap:18px;overflow-x:auto;scrollbar-width:none;-webkit-mask-image:linear-gradient(90deg,#000 88%,transparent);mask-image:linear-gradient(90deg,#000 88%,transparent);padding-right:24px}
 .a-header.c-header.a-book-nav .a-site-nav::-webkit-scrollbar{display:none}
 .a-header.c-header.a-book-nav .a-site-nav a{flex:0 0 auto;font-size:13px}
}
@media(min-width:420px) and (max-width:680px){.a-header.c-header.a-book-nav .a-site-nav{-webkit-mask-image:none;mask-image:none;padding-right:0;justify-content:space-between}}

.a-section-head{max-width:720px;margin-bottom:22px}
.a-section-head h2{font-size:clamp(24px,3.4vw,32px);line-height:1.2;margin:6px 0 10px;text-wrap:balance}
.a-section-head p:last-child{color:var(--color-muted);font-size:16px;line-height:1.65;margin:0}
.a-pillars-section{padding:56px 0 44px;border-top:1px solid var(--color-line);margin-top:32px}
.a-pillars{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}
.a-pillars.is-three{grid-template-columns:repeat(3,minmax(0,1fr));margin-top:28px}
.a-pillar{display:flex;min-width:0}
.a-pillar-main{flex:1;display:flex;flex-direction:column;gap:8px;padding:20px 18px 18px;border:1px solid var(--color-line);border-radius:14px;background:linear-gradient(180deg,#1f2933 0%,#1b2229 100%);color:var(--color-text);text-decoration:none;position:relative;overflow:hidden;transition:border-color .2s,transform .2s}
.a-pillar-main::before{content:"";position:absolute;inset:0 0 auto 0;height:3px;background:var(--color-selection);opacity:.85}
.a-pillar.is-partial .a-pillar-main::before{background:linear-gradient(90deg,var(--color-selection) 60%,#425564 60%)}
.a-pillar.is-planned .a-pillar-main::before{background:#425564}
a.a-pillar-main:hover{border-color:#5d8199;transform:translateY(-2px)}
a.a-pillar-main:focus-visible{outline:3px solid #b6e8ff;outline-offset:3px}
.a-pillar.is-planned .a-pillar-main{background:transparent;border-style:dashed}
.a-pillar-top{display:flex;align-items:center;justify-content:space-between;gap:10px}
.a-pillar-num{font-family:"Latin Modern Roman","Latin Modern",Georgia,serif;font-size:34px;line-height:1;color:#91c7e0;font-variant-numeric:lining-nums}
.a-pillar-status{font-size:11px;letter-spacing:.08em;text-transform:uppercase;font-weight:650;padding:3px 9px;border-radius:999px;border:1px solid #3f6a80;color:#a3defa;white-space:nowrap}
.a-pillar.is-planned .a-pillar-status{border-color:#4d5c67;color:var(--color-muted)}
.a-pillar.is-partial .a-pillar-status{border-color:#6b5a3a;color:#f2c98e}
.a-pillar-title{font-size:20px;line-height:1.25;margin:6px 0 0}
.a-pillar-lead{font-size:15px;font-weight:600;line-height:1.45;margin:0;color:var(--color-text)}
.a-pillar-body{font-size:14px;line-height:1.6;margin:0;color:var(--color-muted)}
.a-pillar-meta{margin-top:auto;padding-top:10px;font-size:13px;color:#91c7e0;font-variant-numeric:tabular-nums}
.a-pillar.is-planned .a-pillar-meta{color:var(--color-muted)}
@media(max-width:1040px){.a-pillars{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:680px){.a-pillars,.a-pillars.is-three{grid-template-columns:minmax(0,1fr)}.a-pillars-section{padding:40px 0 30px}}
@media(prefers-reduced-motion:reduce){.a-pillar-main{transition:none}a.a-pillar-main:hover{transform:none}}

.a-site-footer{max-width:1160px;margin:48px auto 0;padding:32px 30px 28px;border-top:1px solid var(--color-line);color:var(--color-muted);font-size:14px}
.a-site-footer-inner{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(0,1fr) minmax(0,1fr);gap:28px}
.a-site-footer-brand{display:flex;flex-direction:column;gap:6px}
.a-site-footer-brand strong{color:var(--color-text);font-size:17px}
.a-site-footer nav{display:flex;flex-direction:column;align-items:flex-start}
.a-site-footer nav p{margin:0 0 4px;font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:#91c7e0;font-weight:650}
.a-site-footer nav a{display:inline-flex;align-items:center;gap:6px;min-height:44px;color:var(--color-text);text-decoration:none}
.a-site-footer nav a:hover{text-decoration:underline;text-underline-offset:3px}
.a-site-footer nav a small{font-size:11px;color:var(--color-muted)}
.a-site-footer-note{margin:18px 0 0;font-size:12px}
@media(max-width:680px){.a-site-footer{margin-top:32px;padding:26px 16px 24px}.a-site-footer-inner{grid-template-columns:minmax(0,1fr);gap:14px}}

.a-space{max-width:1040px}
.a-space h1{font-size:clamp(30px,5vw,44px);line-height:1.12;margin:6px 0 12px}
.a-status-panel{margin:24px 0 8px;padding:16px 18px;border:1px dashed #4d5c67;border-radius:14px;display:flex;flex-wrap:wrap;gap:10px 14px;align-items:baseline}
.a-status-panel p{margin:0;flex:1 1 320px;line-height:1.6}
.a-status-panel a{color:#a3defa}
.a-plan-list{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.a-plan-list li{padding:16px 18px;border:1px solid var(--color-line);border-radius:12px;display:flex;flex-direction:column;gap:6px;line-height:1.55}
.a-plan-list li span{color:var(--color-muted);font-size:14px}
@media(max-width:680px){.a-plan-list{grid-template-columns:minmax(0,1fr)}}

/* Tentang */
.c-about.a-about{max-width:1100px;padding:40px 30px 40px}
.c-about.a-about section{border-top:0;margin:0;padding:0}
.c-about.a-about h1{font-size:clamp(34px,6vw,60px);line-height:1.05;letter-spacing:-.01em;margin:10px 0 20px;max-width:16ch;text-wrap:balance}
.c-about.a-about h2{font-size:clamp(24px,3.4vw,34px);line-height:1.2;margin:8px 0 14px;max-width:24ch;text-wrap:balance}
.c-about.a-about h3{font-size:18px;margin:0 0 8px}
.c-about.a-about p{font-size:16px;line-height:1.7;color:var(--color-muted)}
.a-about-hero{padding:28px 0 52px;border-bottom:1px solid var(--color-line)}
.c-about.a-about .a-about-lead{font-size:clamp(17px,2vw,20px);line-height:1.6;color:var(--color-text);max-width:60ch;margin:0}
.a-about-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.a-about-actions .primary{flex:0 0 auto;margin:0;min-width:0;width:auto;height:48px}
.a-about-actions .secondary{flex:0 0 auto;margin:0;width:auto;display:inline-flex;align-items:center;min-height:48px;color:var(--color-text);text-decoration:none}
.a-facts{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:0;margin:44px 0 0;border:1px solid var(--color-line);border-radius:14px;overflow:hidden}
.a-facts div{padding:18px 20px;border-right:1px solid var(--color-line)}
.a-facts div:last-child{border-right:0}
.a-facts dt{font-family:"Latin Modern Roman","Latin Modern",Georgia,serif;font-size:44px;line-height:1;color:#a3defa;font-variant-numeric:lining-nums tabular-nums}
.a-facts dd{margin:8px 0 0;font-size:14px;color:var(--color-muted)}
.a-about-block{padding:56px 0 8px!important}
.a-about-problem{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:8px 48px;align-items:start}
.a-about-problem .a-eyebrow{grid-column:1/-1}
.a-about-problem h2{margin-top:0!important}
.c-about.a-about .a-about-problem p:last-child{margin:0;font-size:17px}
.a-principles,.a-audiences{list-style:none;padding:0;margin:8px 0 0;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
.a-principles li{padding:22px 20px;border-radius:14px;background:#1f2933;border-top:3px solid var(--color-selection)}
.a-audiences li{padding:4px 0 0 18px;border-left:2px solid #3f6a80}
.c-about.a-about .a-principles p,.c-about.a-about .a-audiences p{font-size:15px;margin:0}
.c-about.a-about .a-pillars{margin-top:8px}
.a-faq{margin:8px 0 0;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 40px}
.a-faq div{padding:18px 0;border-top:1px solid var(--color-line)}
.a-faq dt{font-weight:650;color:var(--color-text);margin-bottom:6px}
.a-faq dd{margin:0;color:var(--color-muted);line-height:1.65;font-size:15px}
.a-about-contact{padding-bottom:16px!important}
.c-about.a-about .a-about-contact>p{max-width:60ch}
.a-contact-list{list-style:none;padding:0;margin:18px 0 0;display:flex;flex-wrap:wrap;gap:12px}
.a-contact-list li{display:flex;flex-direction:column;gap:2px;padding:14px 18px;border:1px solid var(--color-line);border-radius:12px;min-width:220px}
.a-contact-list span{font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:#91c7e0;font-weight:650}
.a-contact-list a{color:var(--color-text);font-size:17px;min-height:32px;display:inline-flex;align-items:center;user-select:all}
@media(max-width:860px){.a-principles,.a-audiences{grid-template-columns:minmax(0,1fr)}.a-about-problem{grid-template-columns:minmax(0,1fr)}.a-faq{grid-template-columns:minmax(0,1fr)}.a-facts{grid-template-columns:repeat(2,minmax(0,1fr))}.a-facts div:nth-child(2){border-right:0}.a-facts div:nth-child(-n+2){border-bottom:1px solid var(--color-line)}}
@media(max-width:680px){.c-about.a-about{padding:22px 16px 24px}.a-about-hero{padding-bottom:36px}.a-about-block{padding-top:40px!important}.a-facts dt{font-size:36px}.a-facts div{padding:14px 14px}.a-about-actions .primary,.a-about-actions .secondary{flex:1 1 100%;justify-content:center}.a-contact-list li{min-width:0;flex:1 1 100%}}
.a-footer.a-site-footer{display:block;text-align:left}
.a-home .a-pillars-section{margin-top:40px}
@media(max-width:680px){.a-header.a-book-nav nav.a-site-nav{flex-wrap:nowrap;justify-content:flex-start;gap:18px;width:auto;min-width:0}.a-header.a-book-nav nav.a-site-nav a{flex:0 0 auto;padding-inline:0}}
@media(min-width:420px) and (max-width:680px){.a-header.a-book-nav nav.a-site-nav{justify-content:space-between}}
@media(max-width:419px){.a-header.c-header.a-book-nav nav.a-site-nav{gap:4px;justify-content:space-between;-webkit-mask-image:none;mask-image:none;padding-right:0;overflow:visible}.a-header.c-header.a-book-nav nav.a-site-nav a{font-size:12.5px;min-width:44px}}