@font-face{font-family:plexSans;src:url(../media/ibm_plex_sans_cyrillic_400_normal-s.1ob51yn_zh4f3.woff2)format("woff2");font-display:swap;font-weight:400;font-style:normal}@font-face{font-family:plexSans;src:url(../media/ibm_plex_sans_latin_400_normal-s.1xf5nwxyfigak.woff2)format("woff2");font-display:swap;font-weight:400;font-style:normal}@font-face{font-family:plexSans;src:url(../media/ibm_plex_sans_cyrillic_500_normal-s.3j8b5jptl4nhr.woff2)format("woff2");font-display:swap;font-weight:500;font-style:normal}@font-face{font-family:plexSans;src:url(../media/ibm_plex_sans_latin_500_normal-s.2i4a1iuj6lbvw.woff2)format("woff2");font-display:swap;font-weight:500;font-style:normal}@font-face{font-family:plexSans;src:url(../media/ibm_plex_sans_cyrillic_600_normal-s.1bd0br_i69opa.woff2)format("woff2");font-display:swap;font-weight:600;font-style:normal}@font-face{font-family:plexSans;src:url(../media/ibm_plex_sans_latin_600_normal-s.2ovda_azncp9b.woff2)format("woff2");font-display:swap;font-weight:600;font-style:normal}@font-face{font-family:plexSans;src:url(../media/ibm_plex_sans_cyrillic_700_normal-s.18feapymqwhbh.woff2)format("woff2");font-display:swap;font-weight:700;font-style:normal}@font-face{font-family:plexSans;src:url(../media/ibm_plex_sans_latin_700_normal-s.3cj1z__33gk9h.woff2)format("woff2");font-display:swap;font-weight:700;font-style:normal}@font-face{font-family:plexSans Fallback;src:local(Arial);ascent-override:101.35%;descent-override:27.19%;line-gap-override:0.0%;size-adjust:101.13%}.teE2WW_className{font-family:plexSans,plexSans Fallback}.teE2WW_variable{--font-plex-sans:"plexSans", "plexSans Fallback"}
@font-face{font-family:plexMono;src:url(../media/ibm_plex_mono_cyrillic_400_normal-s.3exnfol_7pymn.woff2)format("woff2");font-display:swap;font-weight:400;font-style:normal}@font-face{font-family:plexMono;src:url(../media/ibm_plex_mono_latin_400_normal-s.3z-45c147qudr.woff2)format("woff2");font-display:swap;font-weight:400;font-style:normal}@font-face{font-family:plexMono;src:url(../media/ibm_plex_mono_cyrillic_500_normal-s.0xsu366y2c5ne.woff2)format("woff2");font-display:swap;font-weight:500;font-style:normal}@font-face{font-family:plexMono;src:url(../media/ibm_plex_mono_latin_500_normal-s.2aowb655hzo9u.woff2)format("woff2");font-display:swap;font-weight:500;font-style:normal}@font-face{font-family:plexMono;src:url(../media/ibm_plex_mono_cyrillic_600_normal-s.1ysc611_lm78y.woff2)format("woff2");font-display:swap;font-weight:600;font-style:normal}@font-face{font-family:plexMono;src:url(../media/ibm_plex_mono_latin_600_normal-s.0-k81p_n2_mkc.woff2)format("woff2");font-display:swap;font-weight:600;font-style:normal}@font-face{font-family:plexMono Fallback;src:local(Arial);ascent-override:77.95%;descent-override:20.91%;line-gap-override:0.0%;size-adjust:131.49%}.pROr6a_className{font-family:plexMono,plexMono Fallback}.pROr6a_variable{--font-plex-mono:"plexMono", "plexMono Fallback"}
@layer theme{:root,:host{--font-sans:var(--font-plex-sans);--radius-md:3px;--radius-lg:4px;--default-font-family:var(--font-plex-sans);--default-mono-font-family:var(--font-plex-mono);--color-brand:var(--color-brand);--color-brand-hover:var(--color-brand-hover);--color-brand-soft:var(--color-brand-soft);--color-accent:var(--color-accent);--color-accent-soft:var(--color-accent-soft);--color-accent-ink:var(--color-accent-ink);--color-bg:var(--color-bg);--color-surface:var(--color-surface);--color-surface-elevated:var(--color-surface-elevated);--color-surface-strong:var(--color-surface-strong);--color-border:var(--color-border);--color-dark:var(--color-dark);--color-dark-2:var(--color-dark-2);--color-on-dark:var(--color-on-dark);--color-on-dark-muted:var(--color-on-dark-muted);--color-text:var(--color-text);--color-text-muted:var(--color-text-muted);--color-text-faint:var(--color-text-faint);--color-subject-math:var(--color-subject-math);--color-subject-physics:var(--color-subject-physics);--color-subject-labor:var(--color-subject-labor);--color-subject-informatics:var(--color-subject-informatics);--color-subject-world:var(--color-subject-world);--color-subject-safety:var(--color-subject-safety);--color-subject-chemistry:var(--color-subject-chemistry);--color-success:var(--color-success);--color-success-soft:var(--color-success-soft);--color-warning:var(--color-warning);--color-danger:var(--color-danger);--color-danger-soft:var(--color-danger-soft)}}@layer base{*,:after,:before,::backdrop{box-sizing:border-box;border:0 solid;margin:0;padding:0}::file-selector-button{box-sizing:border-box;border:0 solid;margin:0;padding:0}html,:host{-webkit-text-size-adjust:100%;tab-size:4;line-height:1.5;font-family:var(--default-font-family,ui-sans-serif, system-ui, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji");font-feature-settings:var(--default-font-feature-settings,normal);font-variation-settings:var(--default-font-variation-settings,normal);-webkit-tap-highlight-color:transparent}hr{height:0;color:inherit;border-top-width:1px}abbr:where([title]){-webkit-text-decoration:underline dotted;text-decoration:underline dotted}h1,h2,h3,h4,h5,h6{font-size:inherit;font-weight:inherit}a{color:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;text-decoration:inherit}b,strong{font-weight:bolder}code,kbd,samp,pre{font-family:var(--default-mono-font-family,ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace);font-feature-settings:var(--default-mono-font-feature-settings,normal);font-variation-settings:var(--default-mono-font-variation-settings,normal);font-size:1em}small{font-size:80%}sub,sup{vertical-align:baseline;font-size:75%;line-height:0;position:relative}sub{bottom:-.25em}sup{top:-.5em}table{text-indent:0;border-color:inherit;border-collapse:collapse}:-moz-focusring{outline:auto}progress{vertical-align:baseline}summary{display:list-item}ol,ul,menu{list-style:none}img,svg,video,canvas,audio,iframe,embed,object{vertical-align:middle;display:block}img,video{max-width:100%;height:auto}button,input,select,optgroup,textarea{font:inherit;font-feature-settings:inherit;font-variation-settings:inherit;letter-spacing:inherit;color:inherit;opacity:1;background-color:#0000;border-radius:0}::file-selector-button{font:inherit;font-feature-settings:inherit;font-variation-settings:inherit;letter-spacing:inherit;color:inherit;opacity:1;background-color:#0000;border-radius:0}:where(select:is([multiple],[size])) optgroup{font-weight:bolder}:where(select:is([multiple],[size])) optgroup option{padding-inline-start:20px}::file-selector-button{margin-inline-end:4px}::placeholder{opacity:1}@supports (not ((-webkit-appearance:-apple-pay-button))) or (contain-intrinsic-size:1px){::placeholder{color:currentColor}@supports (color:color-mix(in lab, red, red)){::placeholder{color:color-mix(in oklab, currentcolor 50%, transparent)}}}textarea{resize:vertical}::-webkit-search-decoration{-webkit-appearance:none}::-webkit-date-and-time-value{min-height:1lh;text-align:inherit}::-webkit-datetime-edit{display:inline-flex}::-webkit-datetime-edit-fields-wrapper{padding:0}::-webkit-datetime-edit{padding-block:0}::-webkit-datetime-edit-year-field{padding-block:0}::-webkit-datetime-edit-month-field{padding-block:0}::-webkit-datetime-edit-day-field{padding-block:0}::-webkit-datetime-edit-hour-field{padding-block:0}::-webkit-datetime-edit-minute-field{padding-block:0}::-webkit-datetime-edit-second-field{padding-block:0}::-webkit-datetime-edit-millisecond-field{padding-block:0}::-webkit-datetime-edit-meridiem-field{padding-block:0}::-webkit-calendar-picker-indicator{line-height:1}:-moz-ui-invalid{box-shadow:none}button,input:where([type=button],[type=reset],[type=submit]){appearance:button}::file-selector-button{appearance:button}::-webkit-inner-spin-button{height:auto}::-webkit-outer-spin-button{height:auto}[hidden]:where(:not([hidden=until-found])){display:none!important}}@layer components,utilities;.presentation-page-host{width:max-content}.presentation-pdf-page{background:#fff;flex:none;position:relative}.presentation-pdf-text{text-align:initial;letter-spacing:normal;word-spacing:normal;-moz-text-size-adjust:none;text-size-adjust:none;forced-color-adjust:none;transform-origin:0 0;--min-font-size:1;--text-scale-factor:calc(var(--total-scale-factor) * var(--min-font-size));--min-font-size-inv:calc(1 / var(--min-font-size));line-height:1;position:absolute;inset:0;overflow:clip}.presentation-pdf-text :is(span,br){color:#0000;white-space:pre;cursor:text;transform-origin:0 0;-webkit-user-select:text;user-select:text;position:absolute}.presentation-pdf-text>:not(.markedContent),.presentation-pdf-text .markedContent span:not(.markedContent){--font-height:0;--scale-x:1;--rotate:0deg;font-size:calc(var(--text-scale-factor) * var(--font-height));transform:rotate(var(--rotate)) scaleX(var(--scale-x)) scale(var(--min-font-size-inv))}.presentation-pdf-text .markedContent{display:contents}.presentation-pdf-text ::selection{color:#0000;background:#0064ff4d}:root{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;--color-brand:#c2410c;--color-brand-hover:#9a3412;--color-brand-soft:#ffe8dc;--color-accent:#ff5a1f;--color-accent-soft:#ffe8dc;--color-accent-ink:#111;--color-bg:#e7e7e3;--color-surface:#fafaf9;--color-surface-elevated:#fff;--color-surface-strong:#dcdcd7;--color-border:#cfcfca;--color-dark:#1b1b1b;--color-dark-2:#2b2b2b;--color-on-dark:#f2f2f0;--color-on-dark-muted:#9d9d98;--color-text:#111;--color-text-muted:#4f4f4c;--color-text-faint:#85857f;--color-subject-math:#7c3aed;--color-subject-physics:#2563eb;--color-subject-labor:#ea580c;--color-subject-informatics:#0d9488;--color-subject-world:#1f8a4c;--color-subject-safety:#0e7490;--color-subject-chemistry:#0f766e;--color-success:#15803d;--color-success-soft:#e1f0e5;--color-warning:#b45309;--color-danger:#c81e1e;--color-danger-soft:#f6d2d2}body{background:var(--color-bg);color:var(--color-text);font-family:var(--font-sans), system-ui, sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;overflow-x:clip}.cabinet-frame:has([data-cabinet-workspace]){height:calc(100dvh - var(--user-view-height,0px));min-height:0;overflow:hidden}.cabinet-frame:has([data-cabinet-workspace])>.user-view-offset{position:relative;top:auto}.cabinet-frame:has([data-cabinet-workspace])>.cabinet-content{min-height:0;padding:0;display:flex;overflow:hidden}.cabinet-page:has(>[data-cabinet-workspace]){flex:1;min-width:0;max-width:none;min-height:0;display:flex}[data-cabinet-workspace]{flex:1;min-width:0;min-height:0}body[data-user-view=true]{--user-view-height:7.5rem;padding-top:var(--user-view-height)}body[data-user-view=true] .user-view-offset{top:var(--user-view-height)}body[data-user-view=true] main{scroll-margin-top:calc(var(--user-view-height) + 5rem)}@media (min-width:640px){body[data-user-view=true]{--user-view-height:4.5rem}}@media (min-width:1024px){body[data-user-view=true] .user-view-sidebar{height:calc(100dvh - var(--user-view-height))}}@keyframes action-tooltip-in{0%{opacity:0;transform:translateY(3px)}to{opacity:1;transform:translateY(0)}}.action-tooltip{animation:.12s ease-out both action-tooltip-in}.check-modal-scroll{scrollbar-width:thin;scrollbar-color:var(--color-text-faint) transparent}@supports (color:color-mix(in lab, red, red)){.check-modal-scroll{scrollbar-color:color-mix(in srgb, var(--color-text-faint) 55%, transparent) transparent}}.check-modal-scroll::-webkit-scrollbar{width:6px;height:6px}.check-modal-scroll::-webkit-scrollbar-track{background:0 0}.check-modal-scroll::-webkit-scrollbar-thumb{background:var(--color-text-faint)}@supports (color:color-mix(in lab, red, red)){.check-modal-scroll::-webkit-scrollbar-thumb{background:color-mix(in srgb, var(--color-text-faint) 45%, transparent)}}.check-modal-scroll::-webkit-scrollbar-thumb{border-radius:999px}.check-modal-scroll:hover::-webkit-scrollbar-thumb{background:var(--color-text-faint)}@supports (color:color-mix(in lab, red, red)){.check-modal-scroll:hover::-webkit-scrollbar-thumb{background:color-mix(in srgb, var(--color-text-faint) 70%, transparent)}}@media (prefers-reduced-motion:reduce){.action-tooltip{animation:none}}a,button,input,select,textarea{touch-action:manipulation;-webkit-tap-highlight-color:var(--color-brand)}@supports (color:color-mix(in lab, red, red)){a,button,input,select,textarea{-webkit-tap-highlight-color:color-mix(in srgb, var(--color-brand) 18%, transparent)}}.content-auto-list-item{content-visibility:auto;contain-intrinsic-size:0 180px}.lesson-markdown>:first-child{margin-top:0}.lesson-markdown .katex{color:var(--color-text);font-size:1.04em}.lesson-markdown .katex-display{border-radius:var(--radius-lg);background:var(--color-dark);text-align:center;margin:1.25rem 0;padding:1.5rem 1rem;overflow:auto hidden}.lesson-markdown .katex-display .katex{color:var(--color-on-dark)}.lesson-markdown .katex-display>.katex{min-width:max-content;font-size:1.18em}.lesson-markdown .katex-error{color:var(--color-danger)}.lesson-markdown{overflow-wrap:anywhere;width:100%;max-width:56rem;margin-inline:auto}.lesson-markdown :not(pre)>code,.lesson-markdown a{overflow-wrap:anywhere;word-break:normal}.lesson-markdown img{border:1px solid var(--color-border);border-radius:var(--radius-lg);background:var(--color-bg);width:100%;height:auto;margin:1.5rem auto .5rem;display:block}.lesson-markdown .lesson-md-figure{cursor:zoom-in;width:100%;text-align:inherit;background:0 0;border:0;margin:0;padding:0;display:block}.lesson-markdown .lesson-md-figure:focus-visible{outline:2px solid var(--color-brand);outline-offset:3px;border-radius:var(--radius-lg)}.lesson-markdown .lesson-md-figure img{cursor:zoom-in}.exam-question-content .lesson-markdown img{width:auto;max-width:min(100%,36rem)}.lesson-table-wrap th:not(:last-child),.lesson-table-wrap td:not(:last-child){border-right:1px solid var(--color-border)}.lesson-table-wrap tbody tr:last-child td{border-bottom:0}@media (max-width:639px){.lesson-markdown .katex-display{border-radius:var(--radius-md);margin-inline:-.5rem;padding:1.25rem .75rem}.lesson-markdown img{border-radius:var(--radius-md);width:calc(100% + 1rem);margin-inline:-.5rem}}:focus-visible{outline:2px solid var(--color-brand);outline-offset:2px}.subject-hero-image{-webkit-mask-image:linear-gradient(90deg,#0000 0%,#0003 16%,#000 48%);mask-image:linear-gradient(90deg,#0000 0%,#0003 16%,#000 48%)}@keyframes presentation-dialog-in{0%{opacity:0;transform:translateY(8px)scale(.99)}to{opacity:1;transform:translateY(0)scale(1)}}@keyframes select-in{0%{opacity:0;transform:translateY(-4px)scale(.98)}to{opacity:1;transform:translateY(0)scale(1)}}.presentation-dialog[open]>div{animation:.18s ease-out presentation-dialog-in}.presentation-dialog-panel{padding-top:env(safe-area-inset-top);padding-right:env(safe-area-inset-right);padding-bottom:env(safe-area-inset-bottom);padding-left:env(safe-area-inset-left)}@media (min-width:768px){.presentation-dialog-panel{padding:0}}@media (prefers-reduced-motion:reduce){.presentation-dialog[open]>div{animation:none}}.motion-model-travel{transition:transform 1s linear}@media (prefers-reduced-motion:reduce){.motion-model-travel{transition:none}.motion-model-nonuniform{animation:none!important}}@keyframes matter-solid-motion{0%,to{transform:translate(0)}35%{transform:translate(1px,-1px)}70%{transform:translate(-1px,1px)}}@keyframes matter-liquid-motion{0%,to{transform:translate(0)}33%{transform:translate(5px,-3px)}66%{transform:translate(-4px,3px)}}@keyframes matter-gas-motion{0%,to{transform:translate(0)}25%{transform:translate(12px,-9px)}55%{transform:translate(-10px,8px)}78%{transform:translate(8px,12px)}}.matter-molecule{transform-box:fill-box;transform-origin:50%;will-change:transform}.matter-molecule--solid{animation-name:matter-solid-motion;animation-timing-function:ease-in-out;animation-iteration-count:infinite}.matter-molecule--liquid{animation-name:matter-liquid-motion;animation-timing-function:ease-in-out;animation-iteration-count:infinite}.matter-molecule--gas{animation-name:matter-gas-motion;animation-timing-function:linear;animation-iteration-count:infinite}@media (prefers-reduced-motion:reduce){.matter-molecule{animation:none}}@keyframes convection-stream-motion{to{stroke-dashoffset:-68px}}.convection-flow{animation:4s linear infinite convection-stream-motion}@media (prefers-reduced-motion:reduce){.convection-flow{animation:none}}@media print{.task-page .no-print{display:none!important}body:has(.task-page) header{display:none!important}body:has(.task-page) footer{display:none!important}.task-page{color:#000;background:#fff;max-width:none!important;padding:0!important}.task-page .task-generator-grid{display:block!important}.task-page .task-print-root{width:100%!important}.task-page .print-header{border-bottom:2px solid #000;color:#000!important;background:#fff!important;border-radius:0!important;padding:0 0 1rem!important}.task-page .print-header *{color:#000!important}.task-page .solution{display:none!important}.task-page .print-with-solutions .solution{display:block!important}.task-page li{box-shadow:none!important}}.belpho-content{overflow-wrap:anywhere}.belpho-content>*+*,.belpho-content section+section{margin-top:1.1rem}.belpho-content p,.belpho-content li{margin:.55rem 0}.belpho-content ul,.belpho-content ol{list-style:revert;padding-left:1.5rem}.belpho-content h2,.belpho-content h3{margin:1.2rem 0 .5rem;font-weight:700}.belpho-content figure{max-width:min(100%,720px);margin:1rem auto}.belpho-content figure img{max-width:100%;height:auto;margin:auto;display:block}.belpho-content figcaption{text-align:center;color:var(--color-text-muted);margin-top:.4rem;font-size:.8rem}.belpho-content table{border-collapse:collapse;max-width:100%;display:block;overflow-x:auto}.belpho-content th,.belpho-content td{border:1px solid #d8dce3;padding:.45rem .65rem}.belpho-content a{color:var(--color-brand);text-decoration:underline}.belpho-content details{border:1px solid #d8dce3;border-radius:.5rem;margin:.6rem 0;padding:.75rem 1rem}.belpho-content summary{cursor:pointer;font-weight:600}.belpho-content mjx-container{vertical-align:middle;display:inline-block}.belpho-content svg[aria-hidden=true]{width:0;height:0;position:absolute;overflow:hidden}.olympiad-bank-excerpt{-webkit-line-clamp:2;line-clamp:2;-webkit-box-orient:vertical;display:-webkit-box;overflow:hidden}