.bulk-actions{display:flex;align-items:center;gap:18px;flex-wrap:wrap;margin:0 0 6px;padding:13px 16px;border:1px solid #dce5f5;border-radius:15px;background:#fff}.bulk-actions .select-all,.question-select{display:flex;align-items:center;gap:8px;color:#40506b;font-size:13px;font-weight:700}.bulk-actions input,.question-select input{width:17px;height:17px;accent-color:var(--blue)}.bulk-buttons{display:flex;gap:8px;flex-wrap:wrap;margin-left:auto}.bulk-actions button:disabled,.question-actions button:disabled{cursor:not-allowed;opacity:.55}.export-hint{margin:0 0 16px;color:var(--muted);font-size:12px}.question-card.selected{border-color:#7da1ff;box-shadow:0 0 0 3px rgba(47,98,233,.09),0 9px 30px rgba(31,52,90,.055)}.question-meta>div{display:flex;gap:6px;align-items:center;flex-wrap:wrap}.question-actions{flex-wrap:wrap}.question-actions button{min-width:120px}.settings-grid .profile-card{grid-column:1/-1}.profile-fields{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 18px}.profile-card .primary{min-width:170px}.detail-title+ h4{margin-top:24px}@media(max-width:760px){.bulk-actions{align-items:flex-start}.bulk-buttons{width:100%;margin-left:0}.bulk-buttons button{flex:1}.question-meta{align-items:flex-start}.question-actions button{min-width:calc(50% - 4px)}.profile-fields{grid-template-columns:1fr}}
.sidebar-close{display:none}.sidebar-backdrop{position:fixed;inset:0;z-index:15;border:0;background:rgba(10,20,44,.42);opacity:0;pointer-events:none;transition:opacity .25s}@media(max-width:760px){.sidebar-close{display:grid;position:absolute;right:12px;top:12px;width:38px;height:38px;place-items:center;border-radius:11px;color:#dbe5ff;font-size:26px}.sidebar-close:hover{background:rgba(255,255,255,.1);color:#fff}.sidebar.open+.sidebar-backdrop{opacity:1;pointer-events:auto}}
.card-reason{margin:12px 0 2px;padding:9px 12px;border-radius:10px;background:#fff5e9;color:#9a622e;font-size:12px;font-weight:700}.card-reason.confirmed{background:#eaf8f2;color:#19755b}.review-note{margin:10px 0;padding:10px 12px;border:1px solid #ffd2ce;border-radius:10px;background:#fff2f1;color:#a33d34;font-size:13px}.original-image-block{margin:0 0 22px;padding:16px;border:1px solid #dfe7f3;border-radius:16px;background:#f7f9fc}.original-image-viewer{display:flex;align-items:center;justify-content:center;width:100%;height:min(52vh,440px);overflow:auto;border:1px solid #dbe4f2;border-radius:11px;background:#e8edf5;cursor:zoom-in;overscroll-behavior:contain;touch-action:none}.original-image-viewer.zoomed{justify-content:flex-start;align-items:flex-start;cursor:grab}.original-image-viewer.dragging{cursor:grabbing}.original-image-viewer img{display:block;width:100%;height:auto;max-height:100%;margin:auto;object-fit:contain;border-radius:10px;background:#e8edf5;user-select:none;-webkit-user-drag:none}.original-image-viewer.zoomed img{margin:0;max-width:none}.image-zoom-toolbar{display:flex;align-items:center;gap:8px}.image-zoom-toolbar .compact-button{min-width:34px;padding:6px 10px;font-size:18px;line-height:1}.image-zoom-toolbar strong{min-width:48px;text-align:center;color:#40506b;font-size:12px}.original-image-block p{margin:10px 0 0}.original-image-block .media-error{margin:10px 0 14px;color:#a33d34}.detail-section-head{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-bottom:12px}.detail-section-head h4{margin:0}.reason-review{margin:22px 0;padding:16px;border-radius:16px;background:#f4f7fc}.student-reason{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-bottom:16px;padding:11px 13px;border-radius:11px;background:#fff5e9;color:#915c2b;font-size:13px}.reason-review h4{margin:0 0 5px}.reason-review>.muted{margin:0 0 12px}.reason-checks{display:flex;gap:8px;flex-wrap:wrap}.reason-check{cursor:pointer}.reason-check input{position:absolute;opacity:0;pointer-events:none}.reason-check span{display:block;padding:8px 13px;border:1px solid #d9e1ef;border-radius:999px;background:#fff;color:#65738a;font-size:13px;font-weight:700;transition:.15s}.reason-check input:checked+span{border-color:#86a3f7;background:#eaf0ff;color:#2f5dde;box-shadow:0 0 0 2px rgba(47,93,222,.08)}@media(max-width:760px){.student-reason{align-items:flex-start;flex-direction:column}.detail-section-head{align-items:flex-start;flex-direction:column}.image-zoom-toolbar{width:100%;flex-wrap:wrap}.original-image-viewer{height:42vh}}
.custom-reason-editor{display:grid;gap:8px;margin-top:14px;color:#43516a;font-size:13px;font-weight:750}.custom-reason-editor textarea{width:100%;resize:vertical;line-height:1.6}.custom-reason-editor small{color:var(--muted);font-size:11px;font-weight:500}
.associated-diagrams{margin:0 0 22px;padding:16px;border:1px solid #ded8f6;border-radius:16px;background:#f7f4ff}.associated-diagram{margin:14px 0 0}.associated-diagram-crop{position:relative;overflow:hidden;max-height:440px;border-radius:12px;background:#fff}.associated-diagram-crop img{position:absolute;max-width:none}.associated-diagram-crop img.actual-diagram{position:static;width:100%;height:100%;max-width:100%;object-fit:contain}.associated-diagram figcaption{display:flex;justify-content:space-between;gap:12px;margin-top:8px;color:#69768c;font-size:12px}.associated-diagram figcaption span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.associated-diagram figcaption strong{flex:0 0 auto;color:#7655cb}.diagram-validation-note{margin:13px 0 0;padding:10px 12px;border-radius:10px;background:#fff;color:#5d6c83;font-size:12px}
.math-fraction{display:inline-grid;grid-template-rows:auto auto;vertical-align:middle;margin:0 .15em;text-align:center;line-height:1.15}.math-fraction>span:first-child{padding:0 .22em .08em;border-bottom:1.5px solid currentColor}.math-fraction>span:last-child{padding:.08em .22em 0}.detail-step{white-space:normal;line-height:1.85}.detail-step br{display:block;content:"";margin-top:.3em}
.math-vector{position:relative;display:inline-block;padding-top:.12em;margin:0 .04em;line-height:1}.math-vector::before{content:"→";position:absolute;left:50%;top:-.72em;transform:translateX(-50%) scaleX(.82);font-size:.72em;font-weight:600;line-height:1;white-space:nowrap}.detail-title sup,.detail-title sub,.detail-step sup,.detail-step sub,.question-title sup,.question-title sub{font-size:.72em;line-height:0}
.question-toolbar{align-items:center}.toolbar-spacer{flex:1}.student-question-groups{display:grid;gap:14px}.student-question-group{overflow:hidden;border:1px solid #dfe6f2;border-radius:18px;background:#fff;box-shadow:0 8px 26px rgba(31,52,90,.05)}.student-question-group>summary{display:flex;align-items:center;gap:12px;padding:16px 18px;cursor:pointer;list-style:none;user-select:none}.student-question-group>summary::-webkit-details-marker{display:none}.student-question-group>summary:hover{background:#f8faff}.student-group-avatar{display:grid;place-items:center;width:42px;height:42px;flex:0 0 42px;border-radius:13px;background:var(--blue-soft);color:var(--blue);font-size:18px;font-weight:850}.student-group-name{display:grid;min-width:120px}.student-group-name strong{font-size:16px}.student-group-name small{margin-top:3px;color:var(--muted)}.student-group-count{margin-left:auto;color:#596982;font-size:13px;font-weight:700}.group-chevron{margin-left:4px;color:var(--muted);font-size:20px;transition:transform .2s}.student-question-group[open] .group-chevron{transform:rotate(180deg)}.student-group-body{padding:0 16px 16px;border-top:1px solid #eef2f7}.student-group-body .question-list{padding-top:16px}.pdf-print-frame{position:fixed;left:-10000px;top:0;width:210mm;height:297mm;border:0;opacity:0;pointer-events:none}@media(max-width:760px){.question-toolbar .toolbar-spacer{display:none}.question-toolbar button{flex:1}.student-question-group>summary{align-items:flex-start;flex-wrap:wrap}.student-group-count{margin-left:0}.student-group-name{flex:1}.student-group-body{padding:0 10px 10px}}
.reject-dialog textarea{width:100%;resize:vertical;line-height:1.65}.history-intro{margin:-6px 0 18px;color:var(--muted)}.pdf-history-list{display:grid;gap:12px}.pdf-history-card{display:flex;align-items:center;gap:15px;padding:16px 18px;border:1px solid #dfe6f2;border-radius:17px;background:#fff;box-shadow:0 7px 24px rgba(31,52,90,.05)}.pdf-history-icon{display:grid;place-items:center;width:52px;height:52px;flex:0 0 52px;border-radius:14px;background:#fff0ef;color:#d84b43;font-size:13px;font-weight:900}.pdf-history-main{display:grid;gap:4px;min-width:0;flex:1}.pdf-history-main strong{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.pdf-history-main p,.pdf-history-main small{margin:0;color:var(--muted)}.pdf-render-host{position:fixed;left:-20000px;top:0;width:794px;z-index:-9999;background:#fff;pointer-events:none}.pdf-document{box-sizing:border-box;width:794px;padding:0 38px 34px;color:#17213a;background:#fff;font:14px/1.75 "Microsoft YaHei","PingFang SC",Arial,sans-serif}.pdf-document *{box-sizing:border-box}.pdf-document .cover{padding:90px 30px 70px;text-align:center;border-bottom:3px solid #2f62e9}.pdf-document .cover h1{margin:0 0 10px;font-size:30px}.pdf-document .cover p{margin:5px;color:#64708a}.pdf-document .student-group{padding-top:22px;break-before:page;page-break-before:always}.pdf-document .student-head{display:flex;justify-content:space-between;align-items:flex-end;padding:0 0 10px;border-bottom:2px solid #2f62e9}.pdf-document .student-head div{display:grid}.pdf-document .student-head strong{font-size:22px}.pdf-document .student-head span{color:#65718a}.pdf-document .question{padding:15px 0 18px;border-bottom:1px solid #dfe5ef}.pdf-document .question-number{font-weight:800;color:#2f62e9}.pdf-document .question-number span{margin-left:8px;padding:2px 8px;border-radius:99px;background:#edf3ff;font-size:11px}.pdf-document .stem{margin:10px 0 14px;padding:12px 14px;white-space:pre-wrap;background:#f6f8fc;border-left:3px solid #2f62e9}.pdf-document .answer,.pdf-document .solution,.pdf-document .mistake{margin-top:10px}.pdf-document .answer p,.pdf-document .solution p,.pdf-document .mistake p{margin:4px 0}.pdf-document .solution ol{margin:5px 0 0;padding-left:22px}.pdf-document .solution li{margin-bottom:5px}.pdf-document .mistake{padding:9px 12px;background:#fff7ea}.pdf-document .footer-note{margin-top:18px;text-align:center;color:#8792a6;font-size:11px}@media(max-width:760px){.pdf-history-card{align-items:flex-start;flex-wrap:wrap}.pdf-history-main{min-width:calc(100% - 70px)}.pdf-history-card button{width:100%}}
.pdf-history-icon.word{background:#edf3ff;color:#2862c7}.export-dialog{width:min(650px,calc(100% - 30px))}.export-options{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:20px 0 0;padding:0;border:0}.export-options legend{grid-column:1/-1;margin-bottom:2px;color:#506079;font-size:13px;font-weight:800}.export-options label{position:relative;margin:0}.export-options input{position:absolute;opacity:0;pointer-events:none}.export-options label>span{display:grid;gap:5px;height:100%;padding:15px 16px;border:1px solid #dfe6f2;border-radius:14px;background:#fafbfd;cursor:pointer;transition:.15s}.export-options label>span small{color:var(--muted);font-weight:500}.export-options input:checked+span{border-color:#7497f5;background:#eef3ff;box-shadow:0 0 0 3px rgba(47,98,233,.08);color:#244fc7}.export-range-options{grid-template-columns:repeat(2,minmax(0,1fr))}.export-range-options label:last-child{grid-column:1/-1}.export-options input:disabled+span{cursor:not-allowed;opacity:.48;background:#f3f5f8}.export-options input:disabled+span strong{color:#7c8799}
.student-group-body>.pending-question-head{display:flex;align-items:center;justify-content:space-between;padding:15px 2px 0;color:#4a5971;font-size:13px}.student-group-body>.pending-question-head span{color:var(--muted)}.student-empty-pending,.student-empty-history{margin-top:14px;padding:18px;text-align:center;color:var(--muted);font-size:13px;background:#fafbfd;border-radius:12px}.student-history{margin-top:16px;border:1px solid #e4e9f2;border-radius:14px;background:#fafbfd;overflow:hidden}.student-history>summary{display:flex;align-items:center;gap:12px;padding:13px 15px;list-style:none;cursor:pointer}.student-history>summary::-webkit-details-marker{display:none}.student-history>summary>span:first-child{display:grid;gap:3px}.student-history>summary small{color:var(--muted);font-weight:500}.student-history .history-count{margin-left:auto;color:#64718a;font-size:12px;font-weight:700}.student-history[open] .group-chevron{transform:rotate(180deg)}.history-question-body{padding:0 12px 12px;border-top:1px solid #e8edf5}.history-question-list{padding-top:12px}.question-card{padding:15px;gap:10px}.question-title{font-size:13.5px;line-height:1.62;max-height:110px}.question-meta,.question-foot{font-size:11px}.question-meta .badge{font-size:10px;padding:4px 7px}.question-actions button{min-width:105px;padding:9px 12px;font-size:12px}.question-select{font-size:12px}.history-question-card{background:#fcfdff;border-color:#e6ebf3;box-shadow:none}.history-question-card .question-title{font-size:13px;max-height:92px}.history-question-card .card-reason{margin-top:5px;padding:7px 9px;font-size:11px}
@media(max-width:760px){.export-options{grid-template-columns:1fr}.student-history>summary{align-items:flex-start}.question-card{padding:13px}.question-title{font-size:13px}.question-actions button{min-width:calc(50% - 4px)}}
.code-status-tabs{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px;margin:0 0 10px}.code-status-tab{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:13px 15px;border:1px solid var(--line);border-radius:13px;background:#fff;color:#64718a;font-weight:750}.code-status-tab strong{display:grid;place-items:center;min-width:28px;height:25px;padding:0 8px;border-radius:999px;background:#eef2f8;color:#516078}.code-status-tab:hover{border-color:#a8bdf6;color:var(--blue)}.code-status-tab.active{border-color:#83a4f8;background:var(--blue-soft);color:var(--blue);box-shadow:0 7px 18px rgba(47,98,233,.1)}.code-status-tab.active strong{background:var(--blue);color:#fff}.code-status-hint{margin:0 0 18px;color:var(--muted);font-size:12px}.code-card.status-disabled,.code-card.status-expired{background:#fbfcfe;border-color:#e2e7ef}.code-card.status-disabled .code-value,.code-card.status-expired .code-value{color:#7b8799}@media(max-width:700px){.code-status-tabs{grid-template-columns:repeat(2,minmax(0,1fr))}.code-status-tab{padding:11px 12px}.code-status-hint{line-height:1.6}}
.student-review-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:15px}.student-review-card{display:grid;gap:16px;padding:18px;border:1px solid #dfe6f2;border-radius:17px;background:#fff;box-shadow:0 8px 25px rgba(31,52,90,.05)}.student-review-card-head{display:flex;align-items:center;gap:11px}.student-review-card-head>div{display:grid;min-width:0}.student-review-card-head>div strong{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:15px}.student-review-card-head>div small{margin-top:3px;color:var(--muted)}.student-review-card-head>.badge{margin-left:auto;white-space:nowrap}.student-review-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}.student-review-stats div{display:grid;gap:3px;padding:10px 8px;text-align:center;border-radius:11px;background:#f6f8fc}.student-review-stats strong{font-size:18px}.student-review-stats small{color:var(--muted);font-size:11px}.student-review-card>button{width:100%}.history-bulk-row{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:12px;padding:10px 12px;border-radius:11px;background:#eef3ff;color:#355080;font-size:12px}.history-bulk-row label{display:flex;align-items:center;gap:8px;font-weight:750;cursor:pointer}.history-bulk-row input{width:16px;height:16px;accent-color:var(--blue)}.history-bulk-row>span{color:#6f7f9a}@media(max-width:1120px){.student-review-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:700px){.student-review-grid{grid-template-columns:1fr}.student-review-card{padding:15px}.history-bulk-row{align-items:flex-start;flex-direction:column}}
.brand-mark{padding:0;background:transparent;overflow:hidden}.brand-mark img{display:block;width:58px;height:58px}.logo>img{display:block;width:42px;height:42px;flex:0 0 42px;border-radius:13px}.mobile-logo{align-items:center;gap:8px}.mobile-logo img{display:inline-block;width:34px;height:34px;margin-right:7px;vertical-align:middle;border-radius:10px}.usage-notice{display:flex;gap:12px;align-items:flex-start;margin:0 0 18px;padding:14px 16px;border:1px solid #dce6fb;border-radius:14px;background:#f3f7ff;color:#52627d;font-size:13px;line-height:1.65}.usage-notice strong{flex:0 0 auto;color:#2857cb}.usage-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.usage-card{padding:20px;border:1px solid var(--line);border-radius:18px;background:#fff;box-shadow:0 9px 30px rgba(31,52,90,.055)}.usage-card-head,.usage-card-head>div{display:flex;align-items:center;gap:9px}.usage-card-head{justify-content:space-between}.usage-card-head h3{margin:0;font-size:17px}.usage-provider-dot{display:block;width:12px;height:12px;border-radius:50%;background:#4778ef;box-shadow:0 0 0 5px #eef3ff}.provider-deepseek .usage-provider-dot{background:#6f54df;box-shadow:0 0 0 5px #f1edff}.provider-tencent-ocr .usage-provider-dot{background:#17a37b;box-shadow:0 0 0 5px #e8f8f3}.usage-primary{display:grid;gap:4px;margin:24px 0 12px}.usage-primary strong{font-size:30px;line-height:1;font-variant-numeric:tabular-nums}.usage-primary span,.usage-split,.usage-progress-label,.usage-remaining{color:var(--muted);font-size:12px}.usage-split{display:flex;gap:10px;flex-wrap:wrap;min-height:20px}.usage-progress-label{display:flex;justify-content:space-between;margin-top:19px}.usage-progress-label strong{color:#4d5c75}.usage-progress{height:8px;margin:8px 0;border-radius:99px;background:#edf1f7;overflow:hidden}.usage-progress i{display:block;height:100%;border-radius:inherit;background:linear-gradient(90deg,#4d7cff,#2857df)}.usage-remaining{min-height:34px;line-height:1.5}.usage-balance{display:grid;gap:5px;margin:15px 0;padding:14px;border-radius:13px;background:#ecf9f4}.usage-balance.unavailable{background:#f6f8fb}.usage-balance small,.usage-balance span{color:var(--muted);font-size:11px}.usage-balance strong{font-size:20px}.usage-balance.unavailable strong{font-size:14px;color:#53617a}.usage-links{display:flex;gap:8px}.usage-links a{flex:1;padding:9px 8px;border-radius:10px;text-align:center;text-decoration:none;background:var(--blue-soft);color:var(--blue);font-size:12px;font-weight:750}.usage-budget-panel{display:grid;grid-template-columns:1.25fr repeat(3,minmax(140px,.7fr)) auto;gap:14px;align-items:end;margin-top:20px;padding:20px;border:1px solid var(--line);border-radius:18px;background:#fff}.usage-budget-panel h3{margin:0 0 6px}.usage-budget-panel p{margin:0;color:var(--muted);font-size:12px;line-height:1.55}.usage-budget-panel label{display:grid;gap:7px;color:#53617a;font-size:12px;font-weight:750}.usage-budget-panel input{width:100%;padding:11px 12px;border:1px solid var(--line);border-radius:11px;background:#fafbfd}.usage-updated{margin:12px 2px 0;color:var(--muted);font-size:11px}@media(max-width:1180px){.usage-grid{grid-template-columns:1fr 1fr}.usage-budget-panel{grid-template-columns:1fr 1fr}.usage-budget-panel>div{grid-column:1/-1}}@media(max-width:700px){.mobile-logo{display:flex}.usage-grid{grid-template-columns:1fr}.usage-budget-panel{grid-template-columns:1fr}.usage-budget-panel>div{grid-column:auto}.usage-notice{flex-direction:column}.usage-links{flex-direction:column}}
.teacher-question-editor{display:grid;gap:13px;margin:18px 0 22px;padding:16px;border:1px solid #dce5f5;border-radius:16px;background:#f7f9fd}.teacher-question-editor label{display:grid;gap:7px;color:#4d5c74;font-size:12px;font-weight:750}.teacher-question-editor input,.teacher-question-editor textarea{width:100%;padding:11px 12px;border:1px solid #dbe3ef;border-radius:11px;background:#fff;color:#1d2941;font:inherit;line-height:1.65;resize:vertical}.teacher-question-editor textarea:focus,.teacher-question-editor input:focus{outline:2px solid rgba(47,98,233,.16);border-color:#7d9df0}.teacher-question-editor>button{justify-self:start}@media(max-width:700px){.teacher-question-editor .form-grid{grid-template-columns:1fr}.teacher-question-editor>button{width:100%}}
.family-code-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin:16px 0}.family-code-grid>div{padding:13px;border:1px solid var(--line);border-radius:13px;background:#f8faff}.family-code-grid small{color:var(--muted);font-weight:750}.family-code-grid .code-value{margin:8px 0 11px;font-size:16px;overflow-wrap:anywhere}.family-code-grid button{width:100%;padding:8px 10px}@media(max-width:560px){.family-code-grid{grid-template-columns:1fr}}
.family-code-grid.single-code{grid-template-columns:1fr}.student-code-hint{margin:-4px 0 14px;color:var(--muted);font-size:12px}.student-code-table{min-width:1120px}.student-code-stack{display:grid;gap:8px;min-width:270px}.student-code-row{display:flex;align-items:center;gap:8px;flex-wrap:wrap}.student-code-row>span:first-child{width:48px;color:var(--muted);font-size:11px;font-weight:750}.student-code-row code{padding:5px 8px;border-radius:8px;background:#f3f6fb;color:#263753;font:700 12px/1.35 Consolas,"SFMono-Regular",monospace;letter-spacing:.02em}.student-code-row .link-button{padding:4px 2px;font-size:11px}.student-code-row .compact-button{padding:7px 10px;font-size:11px}.student-code-row .badge{font-size:10px;white-space:nowrap}
.student-feedback-status{margin:5px 0 0 7px;vertical-align:middle}.student-row-actions{display:flex;align-items:center;gap:7px;flex-wrap:wrap}.student-feedback-dialog{width:min(900px,calc(100% - 30px));max-height:calc(100vh - 34px)}.student-feedback-dialog>div{padding:26px}.student-feedback-form{display:grid;gap:18px}.feedback-intro{margin:0;padding:12px 14px;border-radius:12px;background:#f2f6ff;color:#53627b;font-size:13px;line-height:1.65}.feedback-preview-grid{display:grid;grid-template-columns:180px 1fr;gap:14px}.feedback-preview-grid article,.feedback-section{padding:17px;border:1px solid #dfe6f2;border-radius:15px;background:#fff}.feedback-preview-grid article:first-child{display:grid;align-content:center;gap:6px;background:linear-gradient(145deg,#2f62e9,#5987f5);color:#fff}.feedback-preview-grid article:first-child small,.feedback-preview-grid article:first-child span{color:#dbe6ff}.feedback-preview-grid article:first-child strong{font-size:34px}.feedback-summary-card small{color:var(--muted);font-weight:750}.feedback-summary-card p,.feedback-section p{margin:10px 0 0;line-height:1.75}.feedback-section{background:#fafbfd}.feedback-priority-list{display:grid;gap:8px;margin:0;padding:0;list-style:none}.feedback-priority-list li{display:flex;align-items:center;gap:11px;padding:10px 12px;border-radius:11px;background:#fff}.feedback-priority-list li>div{display:grid;gap:3px}.feedback-priority-list small{color:var(--muted);line-height:1.55}.priority-rank{display:grid;place-items:center;width:28px;height:28px;flex:0 0 28px;border-radius:9px;background:var(--blue-soft);color:var(--blue);font-weight:850}.feedback-priority-list .feedback-empty{color:var(--muted);justify-content:center;padding:22px}.feedback-section.advice{border-color:#d4eddf;background:#f2fbf7}.feedback-comment-label{position:relative;display:grid;gap:9px;margin:0!important}.feedback-comment-label>span{display:grid;gap:4px}.feedback-comment-label>span small{color:var(--muted);font-weight:500}.feedback-comment-label textarea{width:100%;padding:14px 15px 32px;border:1px solid #dbe3ef;border-radius:13px;background:#fff;color:var(--ink);font:inherit;line-height:1.7;resize:vertical}.feedback-comment-label textarea:focus{outline:2px solid rgba(47,98,233,.14);border-color:#7d9df0}.feedback-count{position:absolute;right:12px;bottom:10px;color:var(--muted);font-weight:500}.feedback-updated{margin:-10px 0 0;color:var(--muted);font-size:12px}@media(max-width:700px){.student-feedback-dialog>div{padding:19px}.feedback-preview-grid{grid-template-columns:1fr}.feedback-preview-grid article:first-child{grid-template-columns:1fr auto;align-items:center}.feedback-preview-grid article:first-child strong{grid-row:1/3;grid-column:2}.feedback-priority-list li{align-items:flex-start}.student-row-actions{align-items:flex-start;flex-direction:column}}
.feedback-save-row{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:-9px}.feedback-save-row .feedback-updated{margin:0}.feedback-save-status{margin:0;color:var(--muted);font-size:12px;font-weight:750}.feedback-save-status.pending{color:#9a682b}.feedback-save-status.success{color:#14815f}.feedback-save-status.error{color:#b54045}.feedback-history{overflow:hidden;border:1px solid #dfe6f2;border-radius:14px;background:#fafbfd}.feedback-history>summary{display:flex;align-items:center;justify-content:space-between;padding:13px 15px;cursor:pointer;list-style:none;color:#3e4e68;font-size:13px;font-weight:800}.feedback-history>summary::-webkit-details-marker{display:none}.feedback-history>summary strong{display:grid;place-items:center;min-width:27px;height:24px;padding:0 8px;border-radius:999px;background:#e9effc;color:#315bd2;font-size:11px}.feedback-history-list{display:grid;gap:9px;padding:0 12px 12px}.feedback-history-item{padding:12px 13px;border:1px solid #e4e9f2;border-radius:11px;background:#fff}.feedback-history-item>div{display:flex;align-items:center;justify-content:space-between;gap:12px}.feedback-history-item time{color:var(--muted);font-size:11px}.feedback-history-item p{margin:7px 0 0;color:#41506a;font-size:13px;line-height:1.7}.feedback-history-empty{padding:18px;text-align:center;color:var(--muted);font-size:12px}@media(max-width:700px){.feedback-save-row{align-items:flex-start;flex-direction:column}.feedback-history-item>div{align-items:flex-start;flex-direction:column;gap:4px}}
body{padding-bottom:42px}.site-filing{position:fixed;left:0;right:0;bottom:0;z-index:50;min-height:42px;display:flex;align-items:center;justify-content:center;padding:8px 16px;border-top:1px solid rgba(216,224,239,.9);background:rgba(255,255,255,.96);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);font-size:12px;line-height:1.4;color:#78849a}.site-filing a{color:#68758b;text-decoration:none}.site-filing a:hover,.site-filing a:focus-visible{color:#2f63e9;text-decoration:underline}
.diagram-editor>.detail-section-head>div{display:grid;gap:4px}.diagram-editor>.detail-section-head p{margin:0}.diagram-edit-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin:14px 0}.diagram-edit-card{display:grid;gap:11px;padding:13px;border:1px solid #ded8f6;border-radius:14px;background:#fff}.diagram-edit-card .associated-diagram{margin:0}.diagram-edit-card label{display:grid;gap:6px;color:#4d5c74;font-size:12px;font-weight:750}.diagram-edit-card input{width:100%;padding:9px 10px;border:1px solid #dbe3ef;border-radius:9px;font:inherit}.diagram-edit-actions{display:flex;align-items:center;justify-content:space-between;gap:10px}.danger-text{color:#bc4842!important}.diagram-empty{grid-column:1/-1;padding:22px;border:1px dashed #cfd9eb;border-radius:12px;text-align:center;color:var(--muted);background:#fff}.diagram-selection-editor{margin:16px 0;padding:14px;border:1px solid #9db4f5;border-radius:14px;background:#eef3ff}.diagram-selection-editor .detail-section-head{margin-bottom:11px}.diagram-selection-editor p{margin:4px 0 0}.diagram-selection-canvas{position:relative;max-height:560px;overflow:auto;border-radius:10px;background:#202b3d;cursor:crosshair;touch-action:none;user-select:none}.diagram-selection-canvas>img{display:block;width:100%;height:auto;-webkit-user-drag:none}.diagram-selection-box{position:absolute;display:block;border:3px solid #ff6a3d;background:rgba(255,106,61,.16);box-shadow:0 0 0 1px rgba(255,255,255,.9) inset;pointer-events:none}.diagram-selection-box b{position:absolute;left:-3px;top:-28px;padding:3px 8px;border-radius:6px 6px 0 0;background:#ff6a3d;color:#fff;font-size:11px;white-space:nowrap}.diagram-save-row{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-top:14px}.diagram-save-row .diagram-validation-note{flex:1;margin:0}.diagram-save-row .primary{flex:0 0 auto}@media(max-width:760px){.diagram-edit-grid{grid-template-columns:1fr}.diagram-save-row{align-items:stretch;flex-direction:column}.diagram-save-row .primary{width:100%}}
.math-editor-toolbar{display:flex;gap:7px;flex-wrap:wrap;margin:0 0 3px;padding:9px;border:1px solid #dbe3ef;border-radius:11px;background:#fff}.math-editor-toolbar button{padding:6px 9px;border:1px solid #d7e0ef;border-radius:8px;background:#f7f9fd;color:#33445f;font-size:12px;font-weight:750}.math-editor-toolbar button:hover{border-color:#84a2f4;background:#edf3ff;color:#2b58d2}.autosave-status{display:inline-flex;align-items:center;min-height:26px;margin-top:2px;color:#6d7a90;font-size:12px;font-weight:750}.autosave-status.pending{color:#99662a}.autosave-status.success{color:#14815f}.autosave-status.error{color:#b54045}.reason-autosave-status{margin:8px 0 0}.teacher-question-editor>.autosave-status{justify-self:start}
.diagram-selection-stage{position:relative;width:100%}.diagram-selection-stage>img{display:block;width:100%;height:auto;-webkit-user-drag:none}.diagram-edit-card .associated-diagram-crop{max-height:none}
.pdf-document{width:100%;max-width:100%;padding:0 24px 24px}
.pdf-document .question{break-inside:avoid;page-break-inside:avoid}
.pdf-document .question-number{break-after:avoid;page-break-after:avoid}
.pdf-document .work-space{display:block;background:#fff;border:0;break-before:avoid;page-break-before:avoid}
.pdf-document .stem{overflow-wrap:anywhere}
.math-root{display:inline-flex;align-items:stretch;vertical-align:middle;margin:0 .08em;line-height:1.15}.math-root-index{align-self:flex-start;font-size:.58em;min-width:.3em;margin-right:-.12em;transform:translateY(-.22em)}.math-root-sign{align-self:stretch;font-size:1.35em;line-height:1}.math-root-body{border-top:1px solid currentColor;padding:.08em .12em 0 0;align-self:center}.math-root-body sup,.math-root-body sub{font-size:.72em}.detail-title sup:has(.math-fraction),.detail-step sup:has(.math-fraction),.pdf-document sup:has(.math-fraction){display:inline-block;vertical-align:super;font-size:.72em;line-height:1.15}
.math-root{position:relative;align-items:stretch;padding-left:.2em}.math-root-index{position:absolute;left:-.12em;top:.04em;transform:none;min-width:0;margin:0}.math-root-index:empty{display:none}.math-root-sign{position:relative;width:.7em;min-height:1.1em;flex:0 0 .7em;font-size:inherit;align-self:stretch}.math-root-sign svg{display:block;width:100%;height:100%;position:absolute;inset:0;overflow:visible}.math-root-sign path{fill:none;stroke:currentColor;stroke-width:5;stroke-linejoin:miter}.math-root-body{align-self:stretch;padding:.12em .15em .04em 0}
.math-root-sign img{display:block;position:absolute;inset:0;width:100%;height:100%;max-width:none;object-fit:fill}