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b{color:#8a5800}html[data-theme=light] .form-error{color:#a52b36;background:#fff1f2;border-color:#efc6ca}html[data-theme=light] .tutor-shell,html[data-theme=light] .tutor-main{color:var(--text);background:var(--canvas)}html[data-theme=light] .tutor-sidebar,html[data-theme=light] .source-panel{color:var(--text);background:var(--surface);border-color:var(--line)}html[data-theme=light] .tutor-course-back,html[data-theme=light] .history-list button{color:var(--text-soft)}html[data-theme=light] .tutor-course-back b,html[data-theme=light] .tutor-header h1,html[data-theme=light] .tutor-welcome h2,html[data-theme=light] .answer-card strong,html[data-theme=light] .source-panel-header{color:var(--text)}html[data-theme=light] .tutor-course-back small,html[data-theme=light] .tutor-header p,html[data-theme=light] .history-label,html[data-theme=light] .tutor-sidebar-footer span,html[data-theme=light] .tutor-sidebar-footer b,html[data-theme=light] .conversation-date,html[data-theme=light] .tutor-welcome,html[data-theme=light] .source-panel-header b,html[data-theme=light] .source-preview>p{color:var(--text-faint)}html[data-theme=light] .new-chat{color:var(--blue);background:#eef5ff;border-color:#b9d3f4}html[data-theme=light] .history-list button.active,html[data-theme=light] .tutor-history-row.active{color:var(--text);background:var(--surface-2)}html[data-theme=light] .tutor-history-row{border-color:var(--line-soft)}html[data-theme=light] .tutor-history-row small{color:var(--text-faint)}html[data-theme=light] .tutor-header{border-color:var(--line)}html[data-theme=light] .tutor-conversation{background:var(--canvas)}html[data-theme=light] .wide-message.user>div{color:var(--text);background:#eaf3ff}html[data-theme=light] .answer-card,html[data-theme=light] .tutor-composer,html[data-theme=light] .source-excerpt{color:var(--text);background:var(--surface);border-color:var(--line);box-shadow:var(--shadow)}html[data-theme=light] .answer-card p,html[data-theme=light] .source-excerpt p{color:var(--text-soft)}html[data-theme=light] .relation-diagram{background:var(--surface-2)}html[data-theme=light] .answer-sources{border-color:var(--line-soft)}html[data-theme=light] .answer-sources b,html[data-theme=light] .answer-footer,html[data-theme=light] .answer-footer button{color:var(--text-faint)}html[data-theme=light] .answer-sources button,html[data-theme=light] .tutor-header-actions button{color:var(--text-soft);background:var(--surface-2);border-color:var(--line)}html[data-theme=light] .tutor-composer textarea{color:var(--text)}html[data-theme=light] .tutor-composer span{color:var(--text-faint)}html[data-theme=light] .preview-slide{border-color:var(--line);background:linear-gradient(145deg,#edf4fc,#fff)}html[data-theme=light] .preview-slide b{color:var(--text)}html[data-theme=light] .tutor-citation-tooltip{color:var(--text-soft);background:var(--surface);box-shadow:var(--shadow);border-color:#b9d3f4}html[data-theme=light] .agent-history-drawer{color:var(--text);background:var(--surface);border-color:var(--line);box-shadow:var(--shadow)}html[data-theme=light] .agent-history-drawer header{background:var(--surface-2);border-color:var(--line)}html[data-theme=light] .agent-history-drawer header span,html[data-theme=light] .agent-history-list time,html[data-theme=light] .agent-history-empty{color:var(--text-faint)}html[data-theme=light] .agent-history-list article{background:var(--surface-2);border-color:var(--line)}html[data-theme=light] .agent-history-question{color:var(--text)}html[data-theme=light] .agent-history-answer{color:var(--text-soft)}.role-header>span{white-space:nowrap;position:absolute;left:50%;transform:translate(-50%)}.role-footer{justify-content:center}.role-footer>b{text-align:center;margin-left:0}.practice-course-picker{max-width:980px;padding:42px 20px 80px}.practice-course-picker-grid{grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:14px;display:grid}.practice-course-picker-card{border:1px solid var(--line);min-height:170px;color:var(--text);background:var(--surface);box-shadow:var(--shadow);border-radius:10px;align-content:start;gap:8px;padding:22px;transition:border-color .18s,transform .18s,box-shadow .18s;display:grid}.practice-course-picker-card:hover{border-color:#287cf26b;transform:translateY(-2px);box-shadow:0 20px 48px -30px #23487d52}.practice-course-picker-card>svg{width:26px;height:26px;color:var(--blue)}.practice-course-picker-card>span{color:var(--blue);font:700 11px var(--mono)}.practice-course-picker-card h2{margin:0;font-size:18px}.practice-course-picker-card small{color:var(--text-soft);font-size:11px}.practice-page{width:min(1600px,100% - 48px);max-width:1600px;padding:26px 0 80px}.practice-nav{background:0 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p{color:var(--text-soft);margin:0;font-size:15px;line-height:1.7}.practice-start{background:var(--surface);border-color:var(--line);border-radius:12px;padding:30px 28px 27px;display:block;box-shadow:0 14px 40px -30px #23487d4d}.practice-start-heading{align-items:flex-start;gap:17px;display:flex}.practice-start-heading>svg{width:38px;height:38px;color:var(--blue);stroke-width:1.9px;flex:none}.practice-start-heading h2{margin:0;font-size:21px;line-height:1.3}.practice-start-heading p{color:var(--text-soft);margin:7px 0 0;font-size:13px;line-height:1.6}.practice-loading{margin:26px 0 0}.practice-resume{color:#f3ce82;background:#e5a83b12;border:1px solid #e5a83b4d;border-radius:8px;align-items:center;gap:12px;width:100%;margin:24px 0 22px;padding:12px 14px;display:flex}.practice-resume>svg{color:#ef9f16;flex:none;width:23px;height:23px}.practice-resume>div{flex:1;min-width:0}.practice-resume b{font-size:14px;font-weight:600}.practice-resume 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.practice-question .practice-options label.is-selected,html:not([data-theme=light]) .practice-question-nav button:hover:not(:disabled){background:var(--surface-2)}html:not([data-theme=light]) .practice-progress-grid span.is-complete{color:var(--teal);background:#37d6c214;border-color:#37d6c252}@media (max-width:1050px){.practice-question-layout{grid-template-columns:minmax(0,1fr) 275px;gap:28px}.practice-progress-panel,.practice-tip{padding:22px}.practice-progress-grid{gap:14px 8px}.practice-progress-grid button{width:38px;height:38px}.practice-question-nav button{flex:1;min-width:0}}@media (max-width:800px){.practice-question-layout{flex-direction:column;gap:18px;display:flex}.practice-question-aside{grid-template-columns:1fr 1fr;gap:14px;width:100%}.practice-progress-panel,.practice-tip{padding:18px}.practice-progress-grid{gap:12px 8px;margin-top:20px}.practice-progress-grid button{width:36px;height:36px}.practice-tip{align-items:center}.practice-tip p{margin-top:8px}}@media (max-width:560px){.practice-heading-kicker{gap:8px;font-size:14px}.practice-heading-kicker b{font-size:14px}.practice-question{padding:20px 16px}.practice-question>h2{margin:19px 0 20px;font-size:20px}.practice-question .practice-options label{padding:12px 13px;font-size:13px}.practice-question-aside{grid-template-columns:1fr;display:grid}.practice-progress-grid{grid-template-columns:repeat(5,minmax(0,1fr))}.practice-progress-grid button{width:35px;height:35px}.practice-question-nav button{min-height:44px;font-size:13px}}@media (max-width:900px){.practice-filters{grid-template-columns:1fr 1fr;gap:18px}.practice-filters label:last-child{grid-column:1/-1;max-width:360px}}html[data-theme=light] .practice-resume{color:#79530a;background:#fff8e7;border-color:#f0d28d}html[data-theme=light] .practice-resume .button{color:#3569a8;background:#f7fbff;border-color:#c9dcf3}html[data-theme=light] .practice-filters select,html[data-theme=light] .practice-start-actions .button--ghost{background:#fff;border-color:#d8e3ef}html[data-theme=light] .practice-history>div{border-color:#e0e8f2}html[data-theme=light] .practice-history article{background:#fff;border-bottom-color:#e5ecf4}html[data-theme=light] .practice-history article .button{color:#2374df;background:#f7fbff;border-color:#c9dcf3}@media (max-width:650px){.practice-page{width:calc(100% - 28px);padding-top:20px}.practice-breadcrumbs{white-space:nowrap;gap:7px;font-size:12px;overflow-x:auto}.practice-back-link{font-size:13px}.practice-heading{margin:25px 0 21px}.practice-heading h1{font-size:36px}.practice-heading p{font-size:13px}.practice-start{padding:22px 16px}.practice-start-heading{gap:12px}.practice-start-heading>svg{width:31px;height:31px}.practice-start-heading h2{font-size:18px}.practice-start-heading p{font-size:12px}.practice-resume{flex-wrap:wrap;align-items:flex-start}.practice-resume>div{flex-basis:calc(100% - 40px)}.practice-resume 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