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@media(max-width:1200px){.sidebar{width:180px}.brand{padding:30px 18px;font-size:1.13rem;gap:8px}.workspace{margin-left:180px;width:calc(100% - 180px)}.page{padding:25px 20px}.topbar{padding:0 22px}.level{padding:12px 9px;gap:7px}.level-no{width:30px;height:34px;font-size:.8rem}.level strong{font-size:.72rem}.level small{font-size:.6rem}.levels{gap:8px}.course-layout{grid-template-columns:minmax(0,1fr) 310px;gap:14px}.map-group{margin:20px 15px 24px}.module-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:9px}.map-note{font-size:.65rem;flex-wrap:wrap}.map-version{display:none}.level-heading{flex-wrap:wrap}.detail-body{padding:17px}.materials-grid{grid-template-columns:repeat(2,1fr)}.summary-row{gap:20px;flex-wrap:wrap}.summary-row p{margin:0}.profile{padding:20px 10px}.profile .avatar{display:none}}
@media(max-width:900px){.sidebar{width:70px}.brand{padding:25px 20px}.brand span,.nav-caption,.sidebar-note,.profile{display:none}.sidebar nav{padding:8px}.nav-item{font-size:0;justify-content:center;padding:15px 0;gap:0}.nav-item .icon{width:21px;height:21px}.count{display:none}.workspace{margin-left:70px;width:calc(100% - 70px)}.course-layout{grid-template-columns:minmax(0,1fr) 300px}.level{justify-content:center;flex-direction:column;text-align:center}.level strong{font-size:.7rem}.level small{display:none}.levels{gap:6px}.page-heading h1{font-size:1.5rem}.compact-stat{display:none}.level-heading>div{flex-wrap:wrap}.level-heading .muted{margin:0}.teacher-label{display:none}.map-group{padding-left:6px;margin-left:16px;margin-right:10px}.group-label{margin-left:-17px}.module-name{font-size:.7rem}.module-meta{font-size:.6rem}.module-node{min-height:116px;padding:13px 8px}.branch-caption{display:block}.branch-caption>span{display:none}.map-note{padding:12px}.map-footer{font-size:.62rem;padding:4px 14px 17px}.point-node small{font-size:.65rem}.future{padding:28px;gap:20px}.future-grid{grid-template-columns:1fr;gap:10px}}
@media(max-width:700px){.sidebar{width:100%;height:60px;inset:auto 0 0;z-index:10;border-top:1px solid #2c3e5d}.brand{display:none}.sidebar nav{display:flex;padding:0}.nav-item{font-size:.65rem;flex-direction:column;gap:5px;min-height:60px;border-radius:0;margin:0;padding:8px 0}.nav-item .icon{width:18px;height:18px}.workspace{margin:0;width:100%;padding-bottom:65px}.topbar{height:58px;padding:0 18px}.breadcrumb{font-size:.72rem}.breadcrumb span{margin:0 9px}.topbar .secondary{font-size:.71rem;padding:6px 9px}.page{padding:24px 16px}.page-heading{align-items:flex-start;gap:10px;margin-bottom:22px}.page-heading h1{font-size:1.5rem}.page-heading p{font-size:.78rem}.page-heading>.primary{font-size:.75rem;padding:9px 10px}.eyebrow{font-size:.62rem}.levels{gap:5px;margin-bottom:23px}.level{padding:10px 3px;gap:8px;border-radius:8px}.level strong{font-size:.58rem}.level-no{width:30px;height:30px;font-size:.75rem;border-radius:8px}.level-heading>div{gap:7px}.level-heading h2{font-size:1rem}.level-heading .muted{font-size:.67rem}.search{width:100%;padding:9px 11px}.search input{font-size:.8rem}.course-layout{display:flex;flex-direction:column}.map-surface{width:100%;min-height:0;max-height:430px;overflow-y:auto;scrollbar-width:thin}.map-group{margin:22px 18px;padding-left:16px}.group-label{font-size:.77rem;margin-left:-27px}.module-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.module-node{min-height:120px}.module-name{font-size:.74rem}.module-meta{font-size:.62rem}.module-icon{width:32px;height:32px}.point-node{font-size:.84rem}.point-node small{font-size:.72rem}.map-note{font-size:.73rem;line-height:1.8}.map-footer{font-size:.68rem}.lesson-panel{width:100%;position:static;max-height:none;margin-top:8px}.detail-heading{padding:24px}.detail-body{padding:22px 24px}.detail-heading p{font-size:.89rem}.teach-card p{font-size:.91rem}.teach-card h4{font-size:.84rem}.tabs{gap:15px;padding:0 20px}.tabs button{font-size:.87rem}.materials-grid{grid-template-columns:1fr}.summary-row{padding:20px;gap:18px}.summary-row>div{gap:8px}.summary-row strong{font-size:1.5rem}.summary-row span{font-size:.72rem}.question-row{padding:21px;align-items:flex-start;flex-direction:column;gap:15px}.question-row h3{font-size:.97rem}.question-row .muted{font-size:.65rem}.exam-card{padding:20px 17px}.exam-head{gap:8px}.exam-head h2{font-size:1.04rem}.exam-head .primary{font-size:.73rem;padding:9px 10px}.future{padding:25px;display:block}.future>.level-no{margin-bottom:25px}.future h2{font-size:1.5rem}.future-focus{font-size:1rem}.presenting .workspace{padding-bottom:0}.presenting .page{padding:12px}.presenting .lesson-panel{padding:0}.presenting .detail-title h3{font-size:1.7rem}.presenting .detail-body{display:block}.presenting .teach-card p{font-size:1.05rem}.presenting .detail-heading p{font-size:1rem}dialog{padding:22px 20px}dialog h2{font-size:1.06rem}.login{padding:32px 25px}.login-box h1{font-size:2.3rem}.student{padding:14px 16px 115px}.student-question{padding:22px 18px}.student-heading h1{font-size:1.5rem}.student-footer{gap:8px;padding:14px 10px}.student-footer>span{font-size:.7rem;margin-right:auto}.student-footer button{font-size:.78rem;padding:10px 12px}.answer-option{font-size:.9rem}.student-question h2{font-size:1rem}.big-empty{padding:50px 20px}#toast{bottom:78px;min-width:230px;text-align:center}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}
/* v0.2: classroom sequence, project evidence, and readable teaching cards */
[hidden]{display:none!important}button:focus-visible,summary:focus-visible,a:focus-visible{outline:3px solid #4e80d1;outline-offset:3px}button:disabled{opacity:.45;cursor:not-allowed}textarea{line-height:1.75}p,textarea,.teach-card{overflow-wrap:anywhere}.page-heading{margin-bottom:18px}.page-heading h1{font-size:1.65rem;margin:8px 0}.page-heading p{margin:8px 0}.levels{margin-bottom:18px}.course-layout{grid-template-columns:minmax(0,1fr) minmax(360px,42%)}.module-name{font-size:.91rem}.module-meta,.point-node small{font-size:.8rem}.point-node{font-size:.95rem}.teach-card p{font-size:.98rem;line-height:1.95}.teach-card h4{font-size:.88rem}.detail-heading p{font-size:.91rem}.detail-body{padding:22px}.lesson-panel{max-height:calc(100vh - 100px)}.module-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.learning-route{font-size:.8rem;line-height:1.8;padding:14px;background:#f1f5fc;border-radius:8px;margin-bottom:18px}.learning-route strong{display:block;color:#355784}.learning-route .text-button{padding:5px;font-size:.8rem}.worked-example{margin:18px 0;border:1px solid #c7d6ee;border-radius:10px;padding:15px;background:#fcfdff}.worked-example summary{cursor:pointer;font-weight:600;line-height:1.8;color:#31598d}.worked-example .teach-card{margin-top:20px}.worked-example small{color:#71829b}.template-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.template-card,.course-editor,.session-list{background:white;border:1px solid var(--line);border-radius:12px;padding:22px}.template-card h3{line-height:1.6;font-size:1.07rem}.template-card p{font-size:.9rem;line-height:1.9;color:#5d7089}.template-card details{margin:18px 0;font-size:.86rem}.template-card summary{cursor:pointer}.session-layout{display:grid;grid-template-columns:240px minmax(0,1fr);gap:20px;margin-top:24px;align-items:start}.session-list h3{font-size:1rem}.session-link{display:block;text-align:left;width:100%;padding:14px;border:1px solid var(--line);background:white;border-radius:8px;margin:10px 0;line-height:1.7;color:#486080}.session-link.active{background:#edf3ff;border-color:#7d9fcf}.session-link small{display:block;margin-top:5px;color:#6d809c}.course-toolbar{display:flex;gap:10px;flex-wrap:wrap;align-items:center;margin-bottom:20px}.course-editor label{font-size:.9rem}.course-editor textarea,.course-editor input{font-size:.95rem}.step-list{list-style:none;padding:0}.step-list>li{padding:20px;margin:16px 0;border:1px solid var(--line);border-left:3px solid #7694be;border-radius:8px}.step-head,.step-controls{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.step-head strong{margin-right:auto;font-size:.98rem}.step-controls label{flex:1;min-width:100px}.step-list small{color:#647a96}.project-fields{background:white;padding:22px;border:1px solid var(--line);border-radius:12px;margin:20px 0}.project-fields h2{font-size:1.1rem}.project-fields textarea{font-size:1rem;line-height:1.9}.project-editor summary{padding:15px;background:#f1f5fa;border-radius:8px;cursor:pointer}.project-editor .project-fields{border:0;padding:0}.point-choices{max-height:220px;overflow:auto;border:1px solid var(--line);padding:12px;margin-bottom:20px}.point-choices .checkbox-row{padding:10px;font-size:.87rem}.evidence-fields{border:1px solid #c5d7ee;border-radius:10px;margin:20px 0;padding:18px}.evidence-fields section+section{border-top:1px solid var(--line);margin-top:20px}.evidence-fields legend{color:#42689b}.evidence-read{border-left:3px solid #5f84b7;padding:10px 16px;background:#f3f7fc;margin:14px 0;font-size:.9rem;line-height:1.8}.version-history{margin:20px 0}.version-history details{border:1px solid var(--line);border-radius:8px;padding:16px;margin:10px 0;background:#fff}.version-history summary{cursor:pointer;color:#456286;line-height:1.8}.version-history h3{font-size:1.1rem}.lecture{max-width:1100px;margin:auto;padding:28px 40px 120px;min-height:100vh}.lecture-header{display:flex;justify-content:space-between;align-items:center;gap:16px}.lecture-header .eyebrow{line-height:1.7}.lecture-progress{display:flex;gap:8px;overflow:auto;padding:24px 0;margin-bottom:15px}.lecture-progress button{white-space:nowrap;border:1px solid var(--line);background:white;border-radius:20px;padding:9px 15px;color:#54739c}.lecture-progress button.active{background:#315f9d;color:white;border-color:#315f9d}.lecture h1{font-size:2rem;line-height:1.6}.lecture-anchor{color:#71849f;font-size:1rem;line-height:1.7}.lecture .teach-card{background:white;border:1px solid var(--line);border-radius:14px;padding:28px;margin:22px 0}.lecture .teach-card p{font-size:1.35rem;line-height:2}.lecture .teach-card h4{font-size:1.05rem}.lecture .error-card{border-color:#ead7c3;background:#fffcf7}.lecture .focus-card{border-color:#b9cce9;background:#f9fbff}.lecture-footer{position:fixed;bottom:0;left:0;right:0;display:flex;justify-content:center;gap:12px;flex-wrap:wrap;background:#ffffffed;border-top:1px solid var(--line);padding:20px;z-index:12;backdrop-filter:blur(10px)}.teacher-notes{background:#fff5d9;padding:20px;border:1px dashed #ac8e4c;border-radius:10px}.teacher-notes .teach-card p{font-size:1rem}.lecture .media-card{max-width:850px}.lecture .media-card img,.lecture .media-card video{width:100%;max-height:65vh;object-fit:contain}.submitted-files button{margin-left:auto}.nav-item{font-size:.86rem}
@media(max-width:1200px){.course-layout{grid-template-columns:minmax(0,1fr) 360px}.template-grid{grid-template-columns:1fr}.session-layout{grid-template-columns:190px minmax(0,1fr)}.module-name{font-size:.88rem}.module-meta{font-size:.76rem}}
@media(max-width:900px){.nav-item{font-size:0}.course-layout{grid-template-columns:minmax(0,1fr) 340px}.session-layout{grid-template-columns:1fr}.session-list{display:flex;gap:10px;overflow:auto;align-items:center}.session-list h3{min-width:90px}.session-link{min-width:180px}.course-editor{padding:18px}.module-name{font-size:.85rem}.module-meta{font-size:.72rem}}
@media(max-width:700px){.nav-item{font-size:.59rem}.course-layout{display:flex}.module-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.module-name{font-size:.92rem}.module-meta{font-size:.8rem}.lesson-panel{max-height:none}.point-node small{font-size:.8rem}.teach-card p{font-size:1rem}.template-card{padding:18px}.course-toolbar{gap:7px}.course-toolbar button{font-size:.8rem}.course-editor{padding:14px}.step-list>li{padding:14px}.step-head strong{width:100%}.project-fields{padding:18px}.lecture{padding:20px 18px 160px}.lecture h1{font-size:1.6rem}.lecture .teach-card{padding:20px}.lecture .teach-card p{font-size:1.12rem}.lecture-header .eyebrow{font-size:.68rem}.lecture-footer{gap:8px;padding:12px}.lecture-footer button{font-size:.8rem}.lecture-anchor{font-size:.88rem}}

/* Account administration */
.account-password{max-width:600px;background:var(--paper,#fff);padding:28px;border:1px solid #dedfd9;border-radius:16px}.block{display:block;color:#737b74;margin-top:6px}.account-filters{display:flex;gap:18px;align-items:end;margin:20px 0}.account-filters label:first-child{flex:1}.account-levels{display:flex;gap:24px}.account-levels .checkbox-row{flex:1}.student header{gap:18px;flex-wrap:wrap}.table-wrap td .pill{margin:2px}.student .support{margin:14px 0}@media(max-width:720px){.account-filters{display:block}.account-filters label{display:block}.account-password{padding:18px}}

@media(min-width:701px){.sidebar{overflow-y:auto}.sidebar-note{padding-top:20px;margin-bottom:18px}.sidebar .profile{flex-shrink:0}.sidebar nav{flex-shrink:0}}
@media(min-width:701px) and (max-height:780px){.sidebar-note p,.sidebar-note .mini-line{display:none}.sidebar .brand{padding-top:22px;padding-bottom:24px}.sidebar .nav-item{padding-top:11px;padding-bottom:11px}}