.IZjMYq_xpBadge{border:2px solid var(--xp-border,#000);border-radius:var(--radius-sm);background:var(--color-surface);box-shadow:2px 2px 0 var(--xp-shadow,var(--color-primary));flex-shrink:0;align-items:center;gap:4px;padding:4px 10px;display:inline-flex}.IZjMYq_xpValue{font-size:var(--font-size-sm);color:var(--color-text);font-variant-numeric:tabular-nums;font-weight:700}.IZjMYq_xpLabel{text-transform:uppercase;letter-spacing:.5px;color:var(--color-text-secondary);font-size:.65rem;font-weight:700}
.o4Wwfa_header{top:var(--ui-sticky-top);z-index:5;gap:var(--space-3);margin-bottom:var(--space-6);padding:var(--space-3) 0 var(--space-3);border-bottom:1px solid var(--color-border);background:var(--color-bg);-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);flex-direction:column;transition:top .25s;display:flex;position:sticky}.o4Wwfa_topRow{justify-content:space-between;align-items:center;gap:var(--space-3);flex-wrap:wrap;display:flex}.o4Wwfa_topRight{align-items:center;gap:var(--space-3);flex-wrap:wrap;display:inline-flex}.o4Wwfa_backLink{font-size:var(--font-size-sm);color:var(--color-text-secondary);white-space:nowrap;text-transform:capitalize;transition:color var(--transition-fast);align-items:center;gap:4px;font-weight:600;text-decoration:none;display:inline-flex}.o4Wwfa_backLink:hover{color:var(--color-text)}@container main-content (max-width:640px){.o4Wwfa_header{margin-bottom:var(--space-3);padding:var(--space-1) 0 var(--space-2);position:static}}
.MVKmTG_card{--accent:#8b5cf6;margin-bottom:var(--space-5);background:0 0}.MVKmTG_card[data-subject=math]{--accent:#8b5cf6}.MVKmTG_card[data-subject=physics]{--accent:#f59e0b}.MVKmTG_card[data-subject=cs]{--accent:#10b981}.MVKmTG_cardBody{gap:var(--space-2);flex-direction:column;padding:0;display:flex}.MVKmTG_cardTop{align-items:center;gap:var(--space-2);flex-wrap:wrap;display:flex}.MVKmTG_subjectBadge{text-transform:uppercase;letter-spacing:.12em;background:var(--accent);color:#fff;border-radius:999px;align-items:center;padding:3px 10px;font-size:.66rem;font-weight:700;display:inline-flex}.MVKmTG_category{color:var(--color-text-secondary);text-transform:uppercase;letter-spacing:.12em;font-size:.66rem;font-weight:600}.MVKmTG_title{font-family:var(--font-display,"Fraunces"), Georgia, serif;letter-spacing:-.01em;color:var(--ui-ink);margin:6px 0 0;font-size:clamp(1.7rem,2.8vw,2.4rem);font-style:italic;font-weight:400;line-height:1.1}.MVKmTG_byline{gap:var(--space-1) var(--space-2);margin:var(--space-1) 0 0;font-size:var(--font-size-sm);color:var(--color-text-secondary);flex-wrap:wrap;display:flex}.MVKmTG_byline>span+span:before{content:"·";margin-right:var(--space-2)}
.oDhdTa_pageWrapper{margin-top:0}.oDhdTa_pageWrapper p,.oDhdTa_pageWrapper li{margin:.7em 0;font-size:1.1em}.oDhdTa_pageWrapper .mq-math-mode{vertical-align:baseline;line-height:1}:is(.oDhdTa_pageWrapper .mq-math-mode .mq-root-block,.oDhdTa_pageWrapper .mq-math-mode>.mq-root-block){white-space:normal;vertical-align:baseline;width:auto;padding:0;display:inline;overflow:visible}.oDhdTa_pageWrapper table{text-align:center;align-self:center;margin:40px 0}.oDhdTa_articleContainer p a:not([class]),.oDhdTa_articleContainer li a:not([class]){color:var(--ui-link);text-underline-offset:2px;font-weight:600;text-decoration:underline}.oDhdTa_articleContainer{max-width:740px;padding:var(--space-3) 10px 10px;flex-direction:column;margin:0 auto 100px;display:flex;overflow:auto}@container main-content (max-width:1000px){.oDhdTa_articleContainer{width:80vw}}@container main-content (max-width:640px){.oDhdTa_articleContainer{width:auto;margin:0 calc(8px - var(--page-padding-x)) 100px;padding:var(--space-2) 8px 10px}}
.OOTEdW_mathBlock{align-items:center;gap:var(--space-2);margin:var(--space-5) 0;flex-direction:column;display:flex}.OOTEdW_mathCaption{font-size:var(--font-size-sm);color:var(--color-text-secondary);font-style:italic}.OOTEdW_imageFigure{margin:var(--space-5) 0;align-items:stretch;gap:var(--space-2);flex-direction:column;padding:0 6px 6px 0;display:flex}.OOTEdW_imageFigure>img{border-radius:var(--radius-md);width:100%;height:auto;box-shadow:var(--shadow-info-md);background:var(--color-surface);border:2px solid #000;display:block}.OOTEdW_imageFigure img{border-radius:var(--radius-md);width:100%;height:auto;box-shadow:var(--shadow-info-md);background:var(--color-surface);border:2px solid #000;display:block}.OOTEdW_imageFigure figcaption{font-size:var(--font-size-sm);color:var(--color-text-secondary);text-align:center;margin-top:var(--space-1);font-style:italic}.OOTEdW_codeBlock{background:var(--color-bg-secondary,#f8f9fa);border:1px solid var(--color-border);border-radius:var(--radius-sm);padding:var(--space-4);margin:var(--space-5) 0;white-space:pre;font-family:ui-monospace,SFMono-Regular,Consolas,Liberation Mono,monospace;font-size:.9em;overflow-x:auto}.OOTEdW_codeFilename{font-size:var(--font-size-xs);color:var(--color-text-muted);margin-bottom:var(--space-2);font-family:var(--font-family);display:block}.OOTEdW_quoteFigure{margin:var(--space-8) 0 var(--space-6);padding:var(--space-6) var(--space-5) var(--space-4);background:var(--ui-surface);border:var(--ui-line) solid var(--ui-ink);border-radius:var(--ui-radius);box-shadow:var(--ui-off) var(--ui-off) 0 var(--ui-shadow);position:relative}.OOTEdW_quoteFigure:before{content:"“";top:0;left:var(--space-4);background:var(--ui-accent-soft);border:var(--ui-line) solid var(--ui-ink);width:36px;height:36px;color:var(--ui-ink);transform:translateY(-50%) rotate(calc(-6deg * var(--ui-tilt)));pointer-events:none;border-radius:50%;place-items:center;padding-top:10px;font-family:Georgia,serif;font-size:1.9rem;line-height:1;display:grid;position:absolute}.OOTEdW_quote{color:var(--ui-ink);margin:0;padding:0;font-size:clamp(1.05rem,1.3vw,1.2rem);font-weight:600;line-height:1.55}.OOTEdW_quoteBody>:first-child{margin-top:0}.OOTEdW_quoteBody>:last-child{margin-bottom:0}.OOTEdW_quoteAttribution{align-items:center;gap:var(--space-3);margin-top:var(--space-3);padding-top:var(--space-3);border-top:1px solid color-mix(in srgb, var(--ui-ink) 12%, transparent);display:flex}.OOTEdW_quoteAuthorImage{background:color-mix(in srgb, var(--color-text) 8%, transparent);border-radius:50%;flex:none;width:56px;height:56px;display:inline-flex;overflow:hidden}.OOTEdW_quoteAuthorImage img{object-fit:cover;width:100%;height:100%}.OOTEdW_quoteAuthorInfo{flex-direction:column;gap:2px;font-style:normal;display:flex}.OOTEdW_quoteAuthor{font-weight:700;font-size:var(--font-size-sm);color:var(--ui-ink);letter-spacing:-.005em}.OOTEdW_quoteAuthorRole{font-size:var(--font-size-xs);color:var(--color-text-muted)}.OOTEdW_quoteCite{font-size:var(--font-size-xs);color:var(--color-text-muted);font-style:normal}.OOTEdW_quoteSourceLink{font-size:var(--font-size-xs);color:var(--ui-link);align-self:flex-start;margin-top:2px;font-weight:600;text-decoration:none}.OOTEdW_quoteSourceLink:hover{text-decoration:underline}.OOTEdW_tableWrap{margin:var(--space-5) 0;overflow-x:auto}.OOTEdW_table{border-collapse:collapse;width:100%;font-size:var(--font-size-sm)}.OOTEdW_table th,.OOTEdW_table td{border:1px solid var(--color-border);padding:var(--space-2) var(--space-3);text-align:left}.OOTEdW_table th{background:var(--color-bg-secondary,#f8f9fa);font-weight:700}.OOTEdW_videoFigure{margin:var(--space-5) 0;gap:var(--space-2);flex-direction:column;display:flex}.OOTEdW_videoFigure iframe{aspect-ratio:16/9;border-radius:var(--radius-md);border:0;width:100%}.OOTEdW_videoFigure figcaption{font-size:var(--font-size-sm);color:var(--color-text-secondary);text-align:center;font-style:italic}.OOTEdW_separator{border:0;border-top:1px solid var(--color-border);margin:var(--space-6) 0}