/* Shared top navigation and the complete textbook catalogue. */
.workspace{margin-left:0;padding-bottom:0}
.site-header{background:#fffefbf2;border-bottom:1px solid var(--line)}
.site-header-inner{max-width:1440px;margin:auto;min-height:84px;padding:16px 36px;display:flex;align-items:center;gap:42px}
.site-header .brand{flex-shrink:0;font-size:24px;gap:10px}
.site-header .brand small{font-size:9px;letter-spacing:1.4px;margin-top:7px}
.top-nav{display:flex;align-items:center;gap:7px}
.top-nav a{padding:11px 17px;font-size:14px;border-radius:10px;white-space:nowrap;color:#77816f}
.top-nav a.active{background:#eaf0df;color:#3c5c3a;font-weight:650}
.top-nav a:hover{background:#f0f3e9;color:#3c5c3a}
.header-tools{display:flex;align-items:center;gap:17px;margin-left:auto}
.header-tools .mode-switch a{padding:7px 17px;white-space:nowrap}
.header-tools .top-stars{min-height:38px}
main{max-width:1280px;padding:38px 36px 32px}
.footer{padding:12px 36px 28px;font-size:10px}
.footer>div{display:flex;gap:22px}.footer a{color:#748368}.footer a:hover{text-decoration:underline}
.catalog-intro{display:flex;align-items:center;justify-content:space-between;gap:30px;margin:2px 0 30px}
.catalog-intro h1{font-size:32px;letter-spacing:.2px}
.catalog-intro p{margin-top:10px;color:#7b8673;font-size:13px}
.catalog-numbers{display:flex;gap:25px;flex-shrink:0}
.catalog-numbers>span{display:flex;flex-direction:column;color:#88957c;font-size:10px}
.catalog-numbers strong{font:400 29px/1.5 system-ui,sans-serif;color:#6e8558}
.curriculum-controls{background:var(--paper);border:1px solid var(--line);border-radius:16px;padding:9px 22px 17px}
.grade-tabs-new{display:flex;gap:8px;border-bottom:1px solid #e9eddf;padding:6px 0 12px;overflow-x:auto}
.grade-tabs-new a{padding:9px 20px;font-size:13px;border-radius:8px;white-space:nowrap}
.grade-tabs-new .selected{background:#3d6047;color:#fff}
.grade-tabs-new a:not(.selected):hover{background:#edf2e5}
.curriculum-filter-row{display:flex;align-items:center;gap:24px;padding-top:16px;flex-wrap:wrap}
.term-tabs{display:flex;gap:5px;flex-shrink:0}
.term-tabs a{padding:7px 11px;color:#8c9682;border-radius:7px;font-size:12px}
.term-tabs .selected{color:#4c6740;background:#edf2e4;font-weight:600}
.available-toggle{display:flex;align-items:center;gap:8px;color:#7c8a6e;font-size:12px;white-space:nowrap;cursor:pointer}
.available-toggle input{accent-color:#426248;width:16px;height:16px;margin:0}
#curriculum-search{display:flex;align-items:center;gap:4px;flex:1;min-width:240px;max-width:380px;margin-left:auto;background:#f6f7f1;border:1px solid #e3e8d9;border-radius:8px}
#curriculum-query{background:transparent;border:0;width:100%;min-width:0;padding:10px 12px;font-size:12px;color:#465d3f}
#curriculum-query::placeholder{color:#a2aa97}
#curriculum-search button{display:flex;gap:6px;align-items:center;white-space:nowrap;padding:10px 11px;font-size:11px;color:#768b60;min-height:40px}
#curriculum-search .icon{width:14px;height:14px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.catalog-result-bar{display:flex;align-items:center;justify-content:space-between;gap:15px;margin:22px 2px 30px;font-size:11px;color:#819074}
.catalog-result-bar p>span{margin-left:12px;color:#a0aa95}
.catalog-legend{display:flex;gap:18px;font-size:10px;white-space:nowrap}
.catalog-legend span{display:flex;align-items:center;gap:6px}
.catalog-legend i{width:6px;height:6px;border-radius:50%;background:#839d69}
.catalog-legend span:last-child i{background:#c5cdbb}
.curriculum-books{display:grid;gap:38px}
.grade-heading{display:flex;align-items:center;justify-content:space-between;margin:0 2px 15px;gap:15px}
.grade-heading h2{display:flex;align-items:center;gap:12px;font-size:20px}
.grade-heading h2>span{font:400 15px system-ui,sans-serif;color:#a8b497;border-right:1px solid #dce3d2;padding-right:13px}
.grade-heading p{font-size:11px;color:#939e86}
.book-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px;align-items:start}
.book-grid:has(>.book-panel:only-child){grid-template-columns:1fr}
.book-panel{background:var(--paper);border:1px solid #dde5d3;border-radius:15px;overflow:hidden}
.book-heading{display:flex;align-items:center;justify-content:space-between;padding:16px 21px;background:#ecf1e2;border-bottom:1px solid #e0e6d6;color:#6d8159}
.book-panel:nth-child(2) .book-heading{background:#f1efe3;color:#8a805e}
.book-heading>div{display:flex;align-items:center;gap:10px}
.book-heading h3{font-size:14px;font-weight:600}
.book-heading .icon{width:18px;height:18px}
.book-heading>span{font-size:10px;opacity:.8}
.curriculum-unit+ .curriculum-unit{border-top:1px solid #edf0e7}
.curriculum-unit summary{list-style:none;display:flex;align-items:center;gap:13px;padding:17px 21px;cursor:pointer;min-height:62px}
.curriculum-unit summary::-webkit-details-marker{display:none}
.curriculum-unit summary:hover{background:#f7f9f1}
.curriculum-unit summary:focus-visible{outline:2px solid var(--orange);outline-offset:-3px}
.chapter-number{font:400 12px system-ui,sans-serif;color:#a6b197;min-width:18px}
.chapter-name{font-size:13px;flex:1;min-width:0;overflow-wrap:anywhere}
.chapter-status{font-size:10px;color:#a1ac95;white-space:nowrap}
.chapter-status.has-activity{color:#6f8c52;background:#edf3e3;border-radius:5px;padding:2px 7px}
.disclosure-arrow{font-size:17px;color:#a4af95;line-height:1;width:12px;transition:transform .15s}
.curriculum-unit[open] .disclosure-arrow{transform:rotate(180deg)}
.curriculum-unit[open] summary{background:#f4f7ed}
.chapter-body{padding:4px 23px 20px 52px}
.chapter-topics,.course-syllabus ol{list-style:none;padding:0;margin:10px 0 18px}
.chapter-topics li{font-size:12px;line-height:1.8;color:#7a876c;padding:4px 0}
.chapter-activities{border-top:1px dashed #e0e6d5;padding-top:13px;margin-bottom:7px}
.chapter-activities-label{display:block;font-size:10px;color:#96a487;margin-bottom:7px}
.chapter-activities a{display:flex;align-items:center;gap:8px;font-size:12px;color:#587846;padding:10px;border-radius:7px;margin-left:-10px}
.chapter-activities a:hover{background:#edf2e4}
.chapter-activities a span{flex:1}.chapter-activities .icon{width:14px;height:14px}
.chapter-detail-link{display:inline-flex;align-items:center;gap:7px;font-size:11px;color:#8a957b;padding-top:8px}
.chapter-detail-link:hover{color:#3c6540}.chapter-detail-link .icon{width:14px;height:14px}
.chapter-empty{font-size:11px;color:#a0aa94;padding:10px 0;border-top:1px dashed #e0e6d5}
.catalog-bottom-note{font-size:11px;color:#a0aa94;text-align:center;margin:30px 0 12px}
.course-badge{font-size:11px;color:#819371;border:1px solid #dbe4cf;border-radius:8px;padding:9px 12px;white-space:nowrap}
.unit-heading h1{font-size:38px;line-height:1.35}.unit-heading p{max-width:none}
.course-syllabus{align-self:start;background:#edf2e4;border:1px solid #e0e7d5;border-radius:15px;padding:24px}
.course-syllabus>div{display:flex;align-items:center;gap:9px;color:#6d8555}.course-syllabus h2{font-size:14px}
.course-syllabus li{font-size:12px;color:#7b8c68;line-height:1.8;padding:7px 0;border-bottom:1px solid #e1e8d7}
.course-syllabus .small-note{margin-top:6px}
main.game-main{padding:20px 24px 8px}.original-frame{height:calc(100dvh - 204px);min-height:540px}
@media(max-width:1100px){.site-header-inner{gap:22px;padding:15px 24px}.top-nav a{padding:10px 12px}.header-tools{gap:12px}.site-header .brand small{display:none}.header-tools .mode-switch a{padding:7px 12px}.catalog-numbers{gap:19px}.catalog-intro h1{font-size:28px}}
@media(max-width:800px){.site-header-inner{flex-wrap:wrap;gap:12px;padding:16px 24px 10px}.header-tools{order:1}.top-nav{order:2;width:100%;gap:12px}.top-nav a{flex:1;text-align:center}.site-header .brand{font-size:23px}.catalog-intro{align-items:start}.catalog-numbers{display:none}.book-grid{gap:16px}.curriculum-controls{padding-left:16px;padding-right:16px}.grade-tabs-new{gap:4px}.grade-tabs-new a{padding:9px 15px}.curriculum-filter-row{gap:13px}.catalog-result-bar{margin-bottom:25px}.curriculum-unit summary{gap:9px;padding:16px}.chapter-body{padding-left:43px;padding-right:16px}.chapter-status{font-size:9px}#curriculum-search{max-width:none}.footer>div>span{display:none}}
@media(max-width:650px){main{padding:25px 18px}.site-header-inner{padding:14px 18px 9px;gap:12px 7px}.site-header .brand{font-size:21px;gap:7px}.header-tools{gap:9px}.header-tools .mode-switch a{font-size:11px;padding:6px 10px}.header-tools .top-stars{min-height:34px;padding:5px 9px;gap:5px}.header-tools .top-stars>span:first-child{display:inline;font-size:12px}.top-nav{gap:6px}.top-nav a{font-size:12px;padding:10px}.catalog-intro{margin:0 0 22px}.catalog-intro h1{font-size:26px}.catalog-intro p{font-size:12px;line-height:1.9;max-width:300px}.catalog-intro .eyebrow{font-size:8px}.curriculum-controls{padding:5px 12px 12px;border-radius:12px}.grade-tabs-new{padding-bottom:10px;gap:3px}.grade-tabs-new a{padding:9px 12px;font-size:12px}.curriculum-filter-row{gap:10px;padding-top:11px}.term-tabs{gap:1px}.term-tabs a{font-size:11px;padding:7px 8px}.available-toggle{font-size:10px;gap:6px;margin-left:auto}.available-toggle input{width:14px;height:14px}#curriculum-search{flex-basis:100%;min-width:0}.catalog-result-bar{align-items:start;margin:18px 1px 23px;font-size:10px}.catalog-result-bar p>span{display:block;margin:3px 0 0}.catalog-legend{font-size:9px;gap:10px}.book-grid{grid-template-columns:1fr;gap:14px}.grade-heading h2{font-size:18px;gap:10px}.grade-heading p{font-size:10px}.grade-heading h2>span{font-size:13px;padding-right:10px}.curriculum-books{gap:29px}.book-heading{padding:14px 17px}.curriculum-unit summary{padding:16px 17px;min-height:60px;gap:11px}.chapter-name{font-size:13px}.chapter-status{font-size:10px}.chapter-body{padding-left:46px;padding-right:18px}.chapter-topics li{font-size:12px}.catalog-bottom-note{font-size:10px;line-height:1.9}.footer{padding:4px 18px 23px;gap:12px;font-size:9px}.footer>span{display:block}.unit-heading{align-items:start;padding-bottom:23px}.unit-heading h1{font-size:29px}.unit-heading .course-badge{display:none}.course-syllabus{padding:20px}.lesson>div{min-width:180px}.original-frame{min-height:600px}main.game-main{padding:16px 10px 8px}}
@media(max-width:360px){.site-header-inner{padding-left:12px;padding-right:12px}.site-header .brand{font-size:18px;gap:5px}.site-header .brand-mark{width:29px;height:34px}.header-tools{gap:5px}.header-tools .mode-switch a{padding:6px 8px}.header-tools .top-stars{padding:5px 7px}main{padding-left:13px;padding-right:13px}.catalog-intro h1{font-size:24px}.catalog-legend{gap:7px}.chapter-name{font-size:12px}.curriculum-unit summary{gap:8px}.available-toggle{font-size:9px}.term-tabs a{padding:7px}.course-syllabus{padding:18px}}
@media(max-width:650px){.grade-tabs-new{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:5px;overflow:visible}.grade-tabs-new a{text-align:center;padding:9px 5px}}