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#173c3440}dialog::backdrop{background:#213f3669;backdrop-filter:blur(5px)}.dialog-head{display:flex;align-items:flex-start;justify-content:space-between;gap:20px;padding:27px 29px 18px}.dialog-head h2{margin:0 0 7px;font-size:26px}.dialog-head p{margin:0;color:var(--muted);font-size:12px;max-width:750px}.close-dialog{width:40px;height:40px;border:1px solid var(--line);border-radius:50%;flex-shrink:0;background:var(--white)}.close-dialog .icon{width:19px}.dialog-content{padding:0 29px 26px}.dialog-toolbar{display:flex;gap:9px;align-items:center;flex-wrap:wrap;margin-bottom:16px}.dialog-toolbar input{flex:1;min-width:130px}.compact-button{min-height:43px;padding:10px 13px;border:1px solid var(--line);border-radius:10px;display:flex;align-items:center;gap:7px;font-size:12px;font-weight:600;background:var(--white)}.compact-button .icon{width:17px;height:17px}.compact-button.primary{background:var(--green);color:white;width:auto;border-color:var(--green)}.dialog-tabs{display:flex;gap:6px;border-bottom:1px solid var(--line);margin-bottom:18px;overflow:auto}.dialog-tab{font-size:12px;white-space:nowrap;padding:12px 13px;border-bottom:2px solid transparent;min-height:45px}.dialog-tab.active{border-color:var(--green);font-weight:700}.manager-grid{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(0,1fr);gap:22px}.list-panel{background:var(--white);border:1px solid var(--line);border-radius:15px;overflow:hidden}.list-panel-title{display:flex;justify-content:space-between;align-items:center;padding:13px 15px;border-bottom:1px solid var(--line);font-size:12px;font-weight:700}.list-scroll{height:320px;overflow:auto;overscroll-behavior:contain}.catalogue-row{display:flex;align-items:center;gap:10px;min-height:55px;border-bottom:1px solid #edf0e9;padding:9px 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a{overflow-wrap:anywhere}.worksheet-preview{max-width:100%;max-height:100px;object-fit:contain;border:1px solid var(--line);border-radius:9px;background:white}.loading,.fatal{padding:20px}.fatal p{font-size:13px;line-height:1.6}#toast{position:fixed;left:50%;transform:translateX(-50%);bottom:26px;z-index:2000;max-width:min(540px,90vw);background:var(--ink);color:white;font-size:13px;line-height:1.5;border-radius:12px;padding:13px 20px;box-shadow:0 7px 30px #152c3330;opacity:0;pointer-events:none;transition:opacity .2s}#toast.visible{opacity:1}
@media(min-width:1550px){.layout{grid-template-columns:355px minmax(0,1fr)}.sidebar{padding-top:16px}.mode-card{min-height:100px}.intro{max-width:320px}}
@media(max-width:1100px){.header{padding:0 23px;height:78px}.layout{grid-template-columns:282px minmax(0,1fr);gap:19px;padding:9px 23px 12px;height:calc(100dvh - 125px);min-height:620px}.sidebar{padding-right:2px}.header nav{gap:3px}.nav-button{padding:9px 15px}.site-footer{padding:2px 23px 10px}.map-credit span{display:none}.map-pill{font-size:10px}.map-topbar{left:15px;right:15px}.map-bottom{left:15px;right:15px;gap:5px}.map-hint{left:15px;font-size:9px}.map-credit button{font-size:9px}.tool{width:36px;height:40px}.map-region select{max-width:150px}.question-title{font-size:28px}.section-label{margin-top:17px}.intro{margin-bottom:15px}.mode-card{padding:12px 10px;min-height:88px}.progress-teaser{margin-top:17px}.set-select{height:48px}}
@media(max-width:850px) and (orientation:portrait){.layout{height:auto;min-height:0;display:flex;flex-direction:column;padding:8px 23px 14px;gap:16px}.sidebar{overflow:visible;padding:0;display:block}.sidebar.home-sidebar{display:grid;grid-template-columns:1fr 1fr;gap:0 24px}.home-sidebar .home-intro{grid-column:1}.home-sidebar .home-settings{grid-column:2;grid-row:1 / span 2}.home-sidebar .home-action{grid-column:1}.home-sidebar h1{font-size:34px}.home-sidebar .intro{font-size:12px}.home-sidebar .section-label:first-child{margin-top:0}.home-sidebar .mode-card{min-height:82px}.home-sidebar .mode-card>.icon{margin-bottom:5px}.home-sidebar .mode-card small{font-size:9px}.home-sidebar .progress-teaser{display:none}.map-panel{height:52dvh;min-height:400px}.session-sidebar .question-desc{margin-bottom:6px}.session-sidebar .question-title{font-size:27px;margin:4px 0 8px}.session-sidebar .question-top{margin-bottom:7px}.session-sidebar .progress-track{margin-bottom:15px}.session-sidebar .question-category{margin-bottom:6px}.session-sidebar .question-box{margin-top:10px;padding:13px}.session-sidebar .answer-actions{margin-top:8px}.session-sidebar .source-detail{display:none}.session-sidebar .question-box:has(.hint-label){display:none}.session-sidebar .feedback{margin:10px 0;padding:12px}.session-sidebar .helper-note{margin:6px 0}.site-footer{flex-wrap:wrap}.manager-grid{gap:13px}.list-scroll{height:360px}.map-hint{font-size:10px}}
@media(max-width:600px){.header{height:72px;padding:0 14px;gap:8px}.brand{font-size:22px;gap:7px}.brand-mark{width:33px;height:33px;font-size:31px;border-radius:11px}.brand small{font-size:6px;letter-spacing:1.1px}.header nav{padding:3px;margin-left:auto;margin-right:0}.nav-button{font-size:10px;padding:7px 8px;min-height:38px}.header-info{width:30px;height:30px;font-size:15px;flex-shrink:0}.layout{display:flex;flex-direction:column;height:auto;min-height:0;padding:6px 14px 12px;gap:16px}.sidebar{overflow:visible;padding:0}.sidebar.home-sidebar{display:block}.home-intro h1{font-size:34px;max-width:320px;margin-bottom:8px}.home-intro .eyebrow{font-size:9px;margin-bottom:9px}.home-intro .intro{font-size:12px;max-width:100%;margin-bottom:10px}.home-settings .section-label{margin:15px 0 8px}.mode-grid{grid-template-columns:repeat(4,1fr);gap:5px}.mode-card{padding:10px 7px;min-height:80px;border-radius:10px}.mode-card strong{font-size:10px}.mode-card small{font-size:8px}.mode-card>.icon{width:18px;height:18px;margin-bottom:5px}.mode-card.active:after{top:5px;right:5px;width:11px;height:11px;font-size:7px;line-height:11px}.home-action .progress-teaser{display:none}.start-button{margin-top:12px}.map-panel{height:58dvh;min-height:380px;border-radius:18px}.map-topbar{top:13px;left:12px;right:12px}.map-pill{padding:9px;font-size:9px}.map-region select{font-size:10px;max-width:130px}.zoom-tools{right:12px;top:65px}.zoom-tools button{width:39px;height:40px}.map-bottom{left:11px;right:11px;bottom:13px;flex-wrap:wrap}.map-credit span{display:none}.map-credit button{font-size:8px}.map-hint{bottom:73px;left:12px;right:56px;font-size:9px}.drawing-tools{padding:3px}.tool{height:36px;width:35px}.map-credit{margin-left:auto}.site-footer{padding:0 15px 10px;font-size:9px;gap:4px}.site-footer>span:last-child{display:none}.session-sidebar .question-title{font-size:25px}.session-sidebar .question-category{margin-bottom:7px}.session-sidebar .question-desc{font-size:12px;margin-bottom:7px}.session-sidebar .progress-track{margin-bottom:16px}.session-sidebar .question-box{margin-top:12px}.session-sidebar .question-box:has(.hint-label){display:none}.session-sidebar .source-detail{display:none}.session-sidebar .helper-note{font-size:10px;margin:8px 0}.feedback{margin-top:10px;padding:12px}.question-top{margin-bottom:6px}.question-category{font-size:9px}.question-box{padding:13px}.answer-input{font-size:16px}.result-items{max-height:150px}dialog{width:calc(100vw - 18px);max-height:calc(100dvh - 18px);border-radius:19px}.dialog-head{padding:19px 17px 15px;gap:10px}.dialog-head h2{font-size:23px}.dialog-content{padding:0 17px 21px}.dialog-toolbar{gap:6px}.dialog-toolbar input{min-width:100%;font-size:16px}.compact-button{font-size:11px;padding:9px 10px}.dialog-tab{padding:12px 9px;font-size:11px}.manager-grid{grid-template-columns:1fr;gap:15px}.list-scroll{height:240px}.manager-grid .list-panel:last-child .list-scroll{height:175px}.dialog-text{font-size:12px}.source-detail{font-size:10px}.tolerance-row{font-size:10px}.intro{max-width:100%}.explore-list{max-height:160px}.explore-source{font-size:10px}.notice{font-size:10px}}
@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}
@media print{.header,.sidebar,.site-footer,.zoom-tools,.map-topbar,.map-bottom,.map-hint,dialog,#toast{display:none!important}.layout{display:block;padding:0;height:95vh}.map-panel{height:95vh;border:0;box-shadow:none}}
/* Keep the primary action reachable on landscape tablets. Only setup choices scroll. */
@media(min-width:851px){.home-sidebar{display:flex;flex-direction:column;overflow:hidden}.home-intro{flex-shrink:0}.home-settings{overflow:auto;scrollbar-width:thin;min-height:0;padding-right:3px}.home-action{flex-shrink:0;background:var(--paper);padding-top:3px}.home-action .start-button{margin-top:12px}.home-action .progress-teaser{margin-top:13px}}
@media(min-width:851px) and (max-height:900px){.home-intro h1{font-size:31px;margin-bottom:9px}.home-intro .eyebrow{margin-bottom:9px}.home-intro .intro{font-size:12px;margin-bottom:10px}.home-settings .section-label{margin:14px 0 8px}.home-settings .section-label:first-child{margin-top:7px}.home-settings .mode-card{min-height:81px;padding:10px}.home-settings .mode-card>.icon{margin-bottom:6px}.home-settings .mode-card small{font-size:9px}.home-action .progress-teaser{display:none}}
@media(min-width:851px) and (max-height:900px){.home-settings .mode-card{min-height:49px;display:flex;align-items:center;gap:6px;padding:12px 9px}.home-settings .mode-card>.icon{width:18px;height:18px;margin:0}.home-settings .mode-card strong{display:inline;font-size:11px;margin:0}.home-settings .mode-card small{display:none}.home-settings .mode-card.active:after{top:5px;right:5px;width:10px;height:10px;line-height:10px;font-size:7px}}
/* Focused practice: the worksheet sections stay compact on tablets. */
.practice-toggle{display:flex;align-items:center;gap:8px;font-size:11px;line-height:1.4;color:var(--muted);margin-top:9px;font-weight:500;min-height:34px}
.practice-toggle input{margin:0;flex-shrink:0}
.reference-note{font-size:11px;line-height:1.5;padding:10px 12px;border-left:3px solid var(--gold);background:#fbf3e2;border-radius:0 8px 8px 0}
@media(min-width:851px) and (max-height:900px){
 .home-settings .set-select{height:44px;min-height:44px}
 .home-settings .section-label{margin-top:10px}
 .home-settings .set-meta{margin-top:6px}
 .home-settings .mode-grid{grid-template-columns:repeat(4,minmax(0,1fr));gap:5px}
 .home-settings .mode-card{display:flex;flex-direction:column;justify-content:center;gap:7px;padding:10px 3px;min-height:63px}
 .home-settings .mode-card strong{font-size:9.5px}
 .home-settings .practice-toggle{margin-top:6px;min-height:29px}
}