.platform-data-table tbody th{border-block-end:1px solid var(--border);vertical-align:middle;text-align:start;padding:.7rem .85rem}details>summary{cursor:pointer;min-height:2.5rem}details>summary::marker{content:""}details>summary::-webkit-details-marker{display:none}details>summary:after{content:"+";place-items:center;width:1.5rem;height:1.5rem;margin-inline-start:.6rem;font-size:1rem;font-weight:600;display:inline-grid}details[open]>summary:after{content:"−"}details>summary:focus-visible{outline:2px solid var(--ring);outline-offset:2px;border-radius:4px}.course-reader{border-radius:var(--radius-lg);margin-block:1.5rem 2.5rem;overflow:hidden}.course-reader .course-outline>ol{display:block}.course-reader .course-outline>ol>li{padding:.3rem 0;display:block}.course-reader .lesson-nav-button{border-radius:6px;grid-template-columns:1.75rem minmax(0,1fr);min-height:3rem;padding:.65rem .4rem;display:grid}.course-reader .lesson-nav-button[aria-current]{background:var(--surface-strong)}.course-reader .lesson-nav-button>span{font-variant-numeric:tabular-nums;place-items:center;display:grid}.course-reader .lesson-nav-button strong{font-size:.85rem;font-weight:600;line-height:1.5}.course-reader .lesson-nav-button small{grid-column:2;margin:0;font-size:.75rem}.course-reader .course-lesson>.content-prose,.course-reader .course-practice,.course-reader .course-quiz{width:100%;max-width:53rem;margin-inline:auto;padding:1.5rem}.course-reader .course-lesson>header{flex-wrap:wrap;align-items:center}.course-reader .course-lesson>header>span{font-size:.75rem}.course-reader .course-practice h3,.course-reader .course-quiz h3{margin-bottom:.8rem;font-size:1.05rem;font-weight:650}.course-reader .lesson-pagination{max-width:50rem;margin:1rem auto;padding-inline:1rem}.course-reader .lesson-pagination button{min-height:2.5rem}@media (max-width:767px){.admin-page-content>:first-child{padding-inline:.75rem}.course-reader{margin-block:1rem}.course-reader .course-outline>ol>li{border-inline-end:0;min-width:0}.course-reader .course-lesson>.content-prose,.course-reader .course-practice,.course-reader .course-quiz{padding:1rem}}.platform-home .rail-section-heading h2{font-size:.86rem}.platform-home .rail-section-heading>span{font-family:inherit;font-size:.72rem}.platform-home .important-event-meta span,.platform-home .important-event-date,.platform-home .selection-phase-label,.platform-home .selection-phase-updated{font-size:.74rem;line-height:1.55}.platform-home .important-event-link,.platform-home .selection-phase-link{font-size:.8rem}.platform-home .selection-phase-value{font-size:.86rem}.platform-home .countdown-grid small{font-size:.7rem}.platform-home .latest-problem-list{padding:0}.platform-home .latest-problem-list>li{grid-template-columns:1.5rem minmax(0,1fr)}.platform-home .latest-problem-list strong{white-space:normal;font-size:.8rem}.platform-home .latest-problem-list span,.platform-home .latest-problem-list>li>bdi{font-size:.72rem}:root{--state-success:#176332;--state-success-surface:#edf6ee;--state-waiting:#855d08;--state-waiting-surface:#fbf5e5;--state-error:#942e35;--state-error-surface:#faf0f0;--positive:var(--state-success);--positive-soft:var(--state-success-surface);--warning:var(--state-waiting);--warning-soft:var(--state-waiting-surface)}.dark{--state-success:#a1cca9;--state-success-surface:#1b3020;--state-waiting:#e5c57e;--state-waiting-surface:#342c1c;--state-error:#e4acb0;--state-error-surface:#382326}.announcements-section,.next-important-event,.home-selection-status,.latest-problems-panel,.data-table-wrap,.course-outline,.course-lesson,.problem-workspace,.admin-panel,.integrity-panel{border-radius:var(--radius-lg)}.next-important-event,.home-selection-status,.announcements-section,.latest-problems-panel{overflow:hidden}.home-next-rail{gap:.75rem;display:grid}.home-profile-panel{margin:0}.panel-block{border:1px solid var(--border);border-radius:var(--radius-lg);background:var(--surface);min-width:0;padding:1.1rem}.panel-block>h2{margin-block-end:.85rem;font-size:1.05rem;font-weight:650}.profile-card-heading{align-items:center;gap:.8rem;display:flex}.profile-card-heading strong{overflow-wrap:anywhere;font-size:1rem;display:block}.profile-card-heading small{color:var(--muted-foreground);font-size:.78rem;display:block}.profile-avatar{background:var(--surface-strong);border:1px solid var(--border);width:3rem;height:3rem;color:var(--brand-teal);border-radius:50%;flex:none;justify-content:center;align-items:center;font-size:1rem;font-weight:650;display:inline-flex}.profile-card-stats{border-block:1px solid var(--border);grid-template-columns:1fr 1fr;gap:.5rem;margin-block:1rem;padding-block:.8rem;display:grid}.profile-card-stats dt{color:var(--muted-foreground);font-size:.75rem}.profile-card-stats dd{font-size:1.2rem;font-weight:650}.profile-card-links{gap:.4rem;font-size:.82rem;display:grid}.workspace-title{margin-block:0 1.3rem;font-size:1.65rem;font-weight:650}.workspace-section-heading{border-block-end:1px solid var(--border);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:1rem;padding-block-end:.8rem;display:flex}.workspace-section-heading h2{font-size:1.1rem;font-weight:650}.workspace-form{gap:1rem;max-width:48rem;padding-block:1rem;display:grid}.workspace-form label{gap:.4rem;font-size:.86rem;font-weight:550;display:grid}.workspace-form input:not([type=checkbox]),.workspace-form select,.workspace-form textarea,.problem-filters input,.problem-filters select{border:1px solid var(--input);border-radius:var(--radius-sm);background:var(--surface);color:var(--foreground);width:100%;min-width:0;padding:.55rem .65rem}.workspace-form textarea{resize:vertical;min-height:6rem;font-weight:400}.workspace-form .checkbox-label{align-items:flex-start;gap:.65rem;font-weight:400;display:flex}.workspace-form input[type=checkbox]{accent-color:var(--brand-teal);margin-block-start:.2rem}.workspace-form button,.compact-actions button,.lesson-pagination button,.community-workspace button:not(.text-action),.quiz-form>button{border:1px solid var(--border-strong);border-radius:var(--radius-sm);background:var(--surface-quiet);cursor:pointer;width:fit-content;padding:.42rem .8rem;font-size:.82rem}.primary-action,.workspace-form button.primary-action,.quiz-form>button.primary-action{background:var(--brand-teal);color:var(--surface);border-color:var(--brand-teal)}.dark .primary-action,.dark .workspace-form button.primary-action,.dark .quiz-form>button.primary-action{background:var(--primary);color:var(--primary-foreground)}button:disabled{cursor:not-allowed;opacity:.55}.compact-actions{flex-wrap:wrap;align-items:center;gap:.45rem;display:flex}.text-action{font-size:inherit;text-align:start;color:var(--link);cursor:pointer;font-weight:600}.discussion-list{margin:0;padding:0;list-style:none}.discussion-list li{border-block-end:1px solid var(--border);justify-content:space-between;align-items:center;gap:1rem;padding:1rem 0;display:flex}.discussion-list li:last-child{border-block-end:0}.discussion-list p{color:var(--muted-foreground);margin-block-start:.3rem;font-size:.76rem}.discussion-detail>header{justify-content:space-between;align-items:center;gap:.8rem;margin-block:1rem;display:flex}.discussion-detail h3{font-size:1.15rem;font-weight:650}.discussion-post{border-block-end:1px solid var(--border);padding-block:1rem}.discussion-post>header{flex-wrap:wrap;justify-content:space-between;gap:.7rem;font-size:.8rem;display:flex}.discussion-post time{color:var(--muted-foreground)}.discussion-post[data-hidden]{opacity:.7;border-inline-start:3px solid var(--state-waiting);padding-inline-start:1rem}.status-tag{background:var(--surface-quiet);white-space:nowrap;border-radius:.25rem;align-items:center;width:fit-content;padding:.18rem .4rem;font-size:.72rem;font-weight:550;display:inline-flex}.status-tag[data-state=success]{background:var(--state-success-surface);color:var(--state-success)}.table-secondary{color:var(--muted-foreground);margin-block-start:.2rem;font-size:.7rem;display:block}.platform-data-table tbody tr:hover{background:var(--surface-quiet)}.profile-workspace{gap:1rem;display:grid}.profile-identity{flex-wrap:wrap;align-items:center;gap:1rem;display:flex}.profile-identity h1{overflow-wrap:anywhere;font-size:1.6rem;font-weight:650}.profile-identity p{font-size:.86rem}.profile-identity .profile-avatar{width:4rem;height:4rem;font-size:1.3rem}.profile-summary{flex-wrap:wrap;gap:1.8rem;margin-inline-start:auto;display:flex}.profile-summary span{color:var(--muted-foreground);font-size:.78rem}.profile-summary strong{color:var(--foreground);font-size:1.3rem;display:block}.rating-chart{width:100%;max-height:18rem;color:var(--brand-teal);fill:currentColor}.chart-axis{stroke:var(--border-strong);fill:none;stroke-width:1px}.chart-line{stroke:var(--brand-teal);stroke-width:2px}.heatmap-scroll{padding-block:.5rem;overflow-x:auto}.activity-heatmap{grid-template-rows:repeat(7,10px);grid-auto-columns:10px;grid-auto-flow:column;gap:3px;width:max-content;max-width:none;display:grid}.activity-heatmap span{background:var(--surface-strong);border:1px solid var(--border);border-radius:2px}.activity-heatmap [data-level="1"]{background:color-mix(in srgb, var(--state-success) 30%, var(--surface))}.activity-heatmap [data-level="2"]{background:color-mix(in srgb, var(--state-success) 50%, var(--surface))}.activity-heatmap [data-level="3"]{background:color-mix(in srgb, var(--state-success) 75%, var(--surface))}.activity-heatmap [data-level="4"]{background:var(--state-success)}.heatmap-scroll p{color:var(--muted-foreground);margin-block-start:.7rem;font-size:.8rem}.content-prose{overflow-wrap:anywhere;font-size:.93rem;line-height:1.8}.content-prose img.statement-art{border:1px solid var(--border,#d8dee4);background:#fff;border-radius:10px;max-width:100%;height:auto;margin:1.1rem auto;display:block}.content-prose p{margin-block:.9rem}.content-prose h2{margin-block:1.5rem .5rem;font-size:1.2rem;font-weight:650}.content-prose h3{margin-block:1.2rem .5rem;font-size:1.05rem;font-weight:600}.content-prose ul,.content-prose ol{margin-block:.8rem;padding-inline-start:1.5rem}.content-prose ul{list-style:outside}.content-prose ol{list-style:decimal}.content-prose code{background:var(--surface-quiet);direction:ltr;unicode-bidi:isolate;border-radius:3px;padding:.1em .3em;font-size:.87em}.content-prose pre{background:var(--surface-quiet);border:1px solid var(--border);border-radius:var(--radius-sm);direction:ltr;padding:.8rem;overflow:auto}.reading-workspace{grid-template-columns:minmax(0,1fr);align-content:start;gap:1.5rem;max-width:64rem;padding-block:1.5rem 3rem;display:grid}.reading-workspace h1{margin-block-end:.7rem;font-size:1.7rem;font-weight:650;line-height:1.35}.reading-workspace time{color:var(--muted-foreground);font-size:.8rem}.course-catalog-row{margin-block:.75rem}.course-catalog-row a{font-weight:600}.course-catalog-row small{color:var(--muted-foreground);font-size:.8rem}.lesson-nav-button{text-align:start;cursor:pointer;align-items:center;gap:.6rem;width:100%;display:flex}.lesson-nav-button small{color:var(--state-success);margin-inline-start:auto;font-size:.7rem}.quiz-form{gap:1.1rem;display:grid}.quiz-question{border:1px solid var(--border);border-radius:var(--radius-lg);padding:1rem}.course-quiz .quiz-question legend{padding-inline:.25rem;font-size:.9rem;font-weight:600}.course-quiz .quiz-choice{border:1px solid var(--border);border-radius:var(--radius-sm);cursor:pointer;align-items:center;gap:.7rem;margin-block:.45rem;padding:.6rem .75rem;font-size:.86rem;display:flex}.quiz-choice[data-selected]{border-color:var(--brand-teal);background:var(--surface-quiet)}.quiz-choice input{accent-color:var(--brand-teal);flex:none}.quiz-explanation{border-inline-start:3px solid var(--state-waiting);background:var(--state-waiting-surface);margin-block-start:1rem;padding:.6rem .9rem;font-size:.86rem}.quiz-question[data-result=correct] .quiz-explanation{border-color:var(--state-success);background:var(--state-success-surface)}.lesson-pagination{justify-content:space-between;gap:1rem;margin-block:1.5rem;display:flex}.course-lesson .community-workspace{margin-block-start:1.5rem}@media (max-width:767px){.profile-summary{gap:1.5rem;width:100%;margin-inline-start:0}.panel-block{padding:.9rem}.workspace-section-heading{gap:.7rem}.profile-identity h1{font-size:1.3rem}.quiz-question{padding:.75rem}.quiz-choice{padding:.6rem}.reading-workspace h1{font-size:1.35rem}.home-profile-panel{grid-template-columns:minmax(0,1fr) auto;gap:.7rem;display:grid}.home-profile-panel .profile-card-heading{gap:.55rem;min-width:0}.home-profile-panel .profile-avatar{width:2.4rem;height:2.4rem;font-size:.85rem}.home-profile-panel .profile-card-heading strong{font-size:.85rem}.home-profile-panel .profile-card-stats{border:0;align-items:center;gap:.8rem;margin:0;padding:0;display:flex}.home-profile-panel .profile-card-stats dd{font-size:1.05rem}.home-profile-panel .profile-card-stats dt{font-size:.65rem}.home-profile-panel .profile-card-links{border-block-start:1px solid var(--border);flex-wrap:wrap;grid-column:1/-1;gap:.4rem 1rem;padding-block-start:.6rem;font-size:.75rem;display:flex}}@media (prefers-reduced-motion:reduce){.workspace-form *,.quiz-form *{transition:none!important;animation:none!important}}.jupyter-frame[data-ready=false]{visibility:hidden}.problem-editor-actions .text-action{cursor:pointer;min-height:2.75rem;padding-inline:.4rem;font-size:.85rem}.content-prose .content-table{border:1px solid var(--border);border-radius:var(--radius-md);max-width:100%;margin-block:1rem;overflow-x:auto}.content-prose .content-table table{border-collapse:collapse;width:100%;font-size:.9rem}.content-prose .content-table th,.content-prose .content-table td{border-block-end:1px solid var(--border);text-align:start;vertical-align:top;padding:.45rem .7rem}.content-prose .content-table th{background:var(--surface-quiet);font-weight:600}.content-prose .content-table tr:last-child td{border-block-end:0}.content-prose .content-table:focus-visible{outline:2px solid var(--ring);outline-offset:2px}.content-prose[data-variant=lesson] h2{letter-spacing:-.005em;margin-block:2.4rem .7rem;font-size:1.35rem;font-weight:700;line-height:1.35}.content-prose[data-variant=lesson] h3{margin-block:1.8rem .5rem;font-size:1.1rem;font-weight:650}.content-prose[data-variant=lesson]>:first-child{margin-block-start:1.2rem}.content-prose[data-variant=lesson] p{margin-block:1rem}.content-prose[data-variant=lesson] li+li{margin-block-start:.35rem}.content-prose[data-variant=lesson] strong{font-weight:650}.content-prose[data-variant=lesson] hr{border:0;border-block-start:1px solid var(--border);margin-block:2rem}.content-prose[data-variant=lesson] blockquote{border-inline-start:3px solid var(--border-strong);color:var(--muted-foreground);margin-block:1.2rem;padding-inline-start:1rem}.content-prose .katex{direction:ltr;unicode-bidi:isolate;font-size:1.08em}.content-prose .katex-display{margin-block:1.1rem;padding-block:.3rem;overflow:auto hidden}