/* Blue identity, with one complete semantic palette per appearance. */
:root{color-scheme:dark;--bg:#090d14;--panel:#121a27;--panel2:#192334;--sidebar:#0d131e;--inset:#0d1522;--line:#2b3b53;--text:#edf3fc;--muted:#a9b9cf;--accent:#7db6ff;--on-accent:#10233d;--accent-soft:#182d49;--red:#ff9da9;--red-soft:#38202d;--amber:#f3c473;--amber-soft:#332b1e;--mint:var(--accent);--radius:14px}
:root[data-theme=light]{color-scheme:light;--bg:#f1f4f8;--panel:#ffffff;--panel2:#e9eff7;--sidebar:#f8fafc;--inset:#f7f9fc;--line:#cbd5e1;--text:#17263c;--muted:#50617a;--accent:#174ea6;--on-accent:#ffffff;--accent-soft:#e5edfb;--red:#af263d;--red-soft:#fcebef;--amber:#81580b;--amber-soft:#fff3d9}
:root{--control-line:#536985}:root[data-theme=light]{--control-line:#8190a6}
body{background:var(--bg);color:var(--text)}.sidebar{background:var(--sidebar);border-color:var(--line)}.topbar{background:var(--bg);border-color:var(--line)}.sidebar-footer,.page-footer,.session-bottom,.seg-divider{border-color:var(--line)}
.brand{letter-spacing:-.6px}.brand-light,.brand small,.nav-caption,.sidebar-footer,.sidebar-footer small,.page-footer,.top-right,.stat-top,.stat-caption,.card-meta,.subject-info p,.result-detail,.status-legend,.list-note,.note-subtle,.rating-note,.chart-empty,.chart-empty p,.helper,.incorrect-item-meta,.timer-small,.option-letter{color:var(--muted)}.lite{color:var(--accent)}.local-dot{background:var(--accent)}
.panel,.stat,.quiz-card,.incorrect-item,.correction{background:var(--panel);border-color:var(--line);border-radius:var(--radius);box-shadow:none}.panel,.quiz-card{padding:20px}.stat{padding:16px 20px}.panel h2,.empty h3{color:var(--text)}.page-head h1{letter-spacing:-.8px}.page-head p{color:var(--muted);max-width:68ch}
nav a{color:var(--muted)}nav a:hover{background:var(--panel2);color:var(--text)}nav a.active{background:var(--accent-soft);color:var(--accent);border-color:var(--accent)}
.btn{color:var(--text);background:var(--panel2);border-color:var(--line);border-radius:9px;min-height:44px}.btn:hover{border-color:var(--accent);background:var(--accent-soft);color:var(--accent)}.btn.primary{background:var(--accent);color:var(--on-accent);border-color:var(--accent);font-weight:650}.btn.primary:hover{background:var(--accent);color:var(--on-accent);filter:brightness(.94)}.btn.ghost{background:transparent;color:var(--muted)}.btn.ghost:hover{background:var(--accent-soft);color:var(--accent)}.btn.danger{color:var(--red)}
input,select,textarea{background:var(--inset);color:var(--text);border-color:var(--line)}input::placeholder,textarea::placeholder{color:var(--muted);opacity:1}label{color:var(--text)}input[type=checkbox],input[type=radio],progress{accent-color:var(--accent)}.check-row,.option{background:var(--inset);border-color:var(--line);color:var(--text)}.option:hover{border-color:var(--accent)}.option.selected{background:var(--accent-soft);border-color:var(--accent)}.option.selected .option-letter{color:var(--accent)}
input,select,textarea,.btn.ghost,.theme-toggle{border-color:var(--control-line)}
.pill{background:var(--panel2);color:var(--muted);border-color:var(--line)}.pill.mint{background:var(--accent-soft);color:var(--accent);border-color:var(--accent)}.pill.red{background:var(--red-soft);color:var(--red);border-color:var(--red)}.pill.amber{background:var(--amber-soft);color:var(--amber);border-color:var(--amber)}
.question-nav button{background:var(--inset);color:var(--text);border-color:var(--line)}.question-nav button.answered{background:var(--accent-soft);color:var(--accent);border-color:var(--accent)}.question-nav button.current{background:var(--accent);color:var(--on-accent);border-color:var(--accent)}.question-nav button.excluded{color:var(--amber);border-color:var(--amber)}.result-score small{color:var(--muted)}
.correction-option{background:var(--inset);color:var(--text);border-color:var(--line)}.correction-option.correct{border-color:var(--accent)}.correction-option.wrong{border-color:var(--red)}.correction-option p,.source-quote,.source-quote blockquote{color:var(--muted)}.source-quote{background:var(--panel2)}.reminder{background:var(--accent-soft);color:var(--text)}.reminder b{color:var(--accent)}.correction summary::after{color:var(--muted)}
.source-zone,.notice,.json-preview{background:var(--inset);border-color:var(--line);color:var(--muted)}.notice.warning{background:var(--amber-soft);border-color:var(--amber);color:var(--amber)}.empty{border-color:var(--line);color:var(--muted)}.bar,.progress-track{background:var(--panel2)}.bar span,.progress-track span{background:var(--accent)}
dialog{background:var(--panel);border-color:var(--line);color:var(--text)}.dialog-head button{color:var(--muted);min-width:44px;min-height:44px}.dialog-head button:hover{color:var(--text)}#toast{background:var(--accent-soft);border-color:var(--accent);color:var(--text)}#toast.error,#global-message{background:var(--red-soft);color:var(--red);border-color:var(--red)}.top-right #save-indicator{color:var(--muted)}.top-right #save-indicator.error{color:var(--red)}.skip{background:var(--accent);color:var(--on-accent)}
.workspace-tabs [aria-pressed=true]{background:var(--accent);color:var(--on-accent);border-color:var(--accent)}.theme-toggle{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;min-height:44px;background:var(--panel);color:var(--text);border:1px solid var(--line);border-radius:9px;font-size:12px;white-space:nowrap}.theme-toggle:hover{border-color:var(--accent);color:var(--accent)}.topbar{height:auto;min-height:64px;gap:16px}.top-right{flex-wrap:wrap;gap:16px}
.subject-averages{display:flex;flex-direction:column}.subject-summary-list{display:flex;flex:1;flex-direction:column;margin-top:12px;min-width:0}.subject-average{display:flex;flex:1;flex-direction:column;justify-content:center;min-width:0;min-height:96px;padding:16px 0;border-bottom:1px solid var(--line)}.subject-average:last-child{border:0}.subject-average-heading{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:12px;align-items:baseline}.subject-average-heading strong{font-size:22px;font-variant-numeric:tabular-nums;color:var(--accent);white-space:nowrap}.subject-average h3{font-size:14px;line-height:1.45;overflow-wrap:anywhere}.subject-average small{display:block;font-size:12px;margin-top:4px}.subject-average meter{width:100%;height:6px;margin-top:8px;appearance:none;background:var(--panel2);border:0;border-radius:4px}.subject-average meter::-webkit-meter-bar{background:var(--panel2);border:0;border-radius:4px}.subject-average meter::-webkit-meter-optimum-value{background:var(--accent);border-radius:4px}.subject-average meter::-moz-meter-bar{background:var(--accent)}
.subject-average-heading strong small{display:inline;font-size:11px;color:var(--muted);margin:0}
.subject-average meter{display:block;height:5px;margin:7px 0 0}#breadcrumb{color:var(--muted)}.incorrect-item h2{max-width:75ch}.incorrect-item>p{max-width:75ch}
.error-tabs{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:20px}.error-tabs .btn{display:inline-flex;gap:8px;align-items:center;justify-content:center}.error-tabs [aria-pressed=true]{background:var(--accent-soft);color:var(--accent);border-color:var(--accent);font-weight:650}.error-tabs .tab-count{font-size:12px;font-variant-numeric:tabular-nums;opacity:.85}.incorrect-item{padding:22px;margin:14px 0}.incorrect-item h2{font-size:18px;line-height:1.5;margin:12px 0}.incorrect-item>p{color:var(--muted);font-size:14px;line-height:1.6}.incorrect-item details{margin-top:14px}.incorrect-item summary{cursor:pointer;color:var(--accent);min-height:44px;padding:10px 0}.incorrect-item .option-title{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}.incorrect-item .correction-option{margin:8px 0}.item-mistake{display:flex;gap:8px;flex-wrap:wrap;align-items:center;margin-top:12px}.error-help{font-size:14px;max-width:75ch;color:var(--muted);margin:8px 0 20px}
main[data-route=library] .grid-cards{grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;align-items:stretch}.quiz-card{display:flex;flex-direction:column;min-width:0}.quiz-card h2{font-size:18px;line-height:1.4;overflow-wrap:anywhere}.quiz-card>p{font-size:13px;line-height:1.5;color:var(--muted);margin-top:10px}.quiz-card .card-meta{font-size:12px;margin-block:16px}.quiz-card .actions{margin-top:auto;gap:8px;padding-top:8px}.quiz-card .badge-row{gap:6px}.quiz-card .pill{font-size:11px;max-width:100%;overflow-wrap:anywhere}.library-summary{display:flex;align-items:center;flex-wrap:wrap;gap:8px}.list-pagination{margin:20px 0 8px}.filterbar{margin-bottom:18px}
@media(max-width:1150px){main[data-route=library] .grid-cards{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:850px){.panel,.quiz-card{padding:16px}.topbar{padding:8px 16px;min-height:58px}.top-right{gap:10px;flex:1;justify-content:flex-end}.theme-toggle{min-width:44px;padding:8px}.theme-toggle span{display:none}.sidebar nav a{min-height:42px}.error-tabs{gap:8px;margin-bottom:16px}.error-tabs .btn{padding:8px 10px;font-size:12px}.incorrect-item{padding:16px}.incorrect-item h2{font-size:16px}.subject-average{min-height:88px;padding:14px 0}.subject-average-heading{gap:10px}.subject-average h3{font-size:13px}.subject-averages{padding:14px}.subject-averages>h2{font-size:16px}.dashboard-bottom .panel:not(.notes-chart){padding:14px}main[data-route=library],main[data-route=errors]{padding-top:22px}.page-head h1{font-size:25px}.stats .stat{padding:12px}.library-summary{font-size:13px}}
@media(max-width:560px){main[data-route=library] .grid-cards{grid-template-columns:minmax(0,1fr)}.topbar #breadcrumb{font-size:12px}.topbar #network{display:none}.error-tabs{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:6px}.error-tabs .btn{flex-direction:column;gap:2px;padding:8px 4px}.error-tabs .tab-count{font-size:11px}.quiz-card h2{font-size:18px}.quiz-card .actions .btn{font-size:12px}.incorrect-item .actions{flex-wrap:wrap}}
@media(max-width:560px){main[data-route=home] .stats .stat{padding:9px 6px}main[data-route=home] .stat-value{font-size:20px;white-space:nowrap}main[data-route=home] .stat-value small{display:inline}}

/* Batch deletion keeps selection and confirmation in a single bounded dialog. */
dialog:has(.bulk-picker){width:min(760px,calc(100vw - 24px));max-width:760px;max-height:90dvh;overflow:hidden;padding:24px}
dialog:has(.bulk-picker) #dialog-content{display:flex;flex-direction:column;max-height:calc(90dvh - 48px);min-height:0}
.bulk-picker{display:flex;flex-direction:column;min-height:0;gap:14px}.bulk-picker p{margin:0;line-height:1.55}.bulk-tools{display:flex;flex-wrap:wrap;gap:8px}.bulk-list{overflow-y:auto;overscroll-behavior:contain;min-height:0;max-height:48dvh;border:1px solid var(--line);border-radius:10px;scrollbar-gutter:stable}.bulk-row{display:flex;align-items:flex-start;gap:14px;padding:16px;margin:0;cursor:pointer;border-bottom:1px solid var(--line)}.bulk-row:last-child{border:0}.bulk-row:has(input:checked){background:var(--accent-soft)}.bulk-row:focus-within{outline:2px solid var(--accent);outline-offset:-3px}.bulk-row input{width:20px;height:20px;flex:none;margin:2px 0 0}.bulk-row span{min-width:0}.bulk-row strong,.bulk-confirm-list strong{display:block;font-size:14px;line-height:1.5;overflow-wrap:anywhere}.bulk-row small,.bulk-confirm-list small{display:block;color:var(--muted);font-size:12px;line-height:1.5;margin-top:4px}.bulk-confirm-list{list-style:none;margin:0;padding:0}.bulk-confirm-list li{padding:14px 16px;border-bottom:1px solid var(--line)}.bulk-confirm-list li:last-child{border:0}.bulk-picker .dialog-actions{flex-shrink:0;margin-top:0;flex-wrap:wrap}.bulk-danger{background:var(--red-soft);color:var(--red);border-color:var(--red)}.bulk-danger:hover{background:var(--red-soft);color:var(--red);border-color:var(--red);filter:brightness(.95)}#bulk-count{color:var(--text);font-size:13px;font-variant-numeric:tabular-nums}
@media(max-width:560px){dialog:has(.bulk-picker){padding:16px}dialog:has(.bulk-picker) #dialog-content{max-height:calc(90dvh - 32px)}dialog:has(.bulk-picker) .dialog-head{margin-bottom:12px}dialog:has(.bulk-picker) .dialog-head h2{font-size:19px}.bulk-picker{gap:10px}.bulk-picker .helper{font-size:12px}.bulk-row{padding:12px;gap:12px}.bulk-tools .btn{font-size:12px;padding:8px}.bulk-picker .dialog-actions .btn{flex:1;font-size:12px}.bulk-list{max-height:42dvh}}