.header{border-bottom:1px solid var(--color-border);padding:.6rem 0;position:sticky;top:0;z-index:100;backdrop-filter:blur(16px) saturate(1.4);-webkit-backdrop-filter:blur(16px) saturate(1.4);background:#ffffffe0}[data-theme=dark] .header{background:#111827eb}.header__inner{display:flex;justify-content:space-between;align-items:center;gap:1rem}.header__logo{display:flex;align-items:center;gap:.45rem;font-size:1.05rem;font-weight:800;letter-spacing:-.02em;color:var(--color-text);text-decoration:none;flex-shrink:0}.header__logo:hover{color:var(--color-primary);text-decoration:none}@media(max-width:360px){.header__logo span{display:none}}.header__nav--desktop{display:flex;gap:.2rem;align-items:center}.header__nav--desktop>a{color:var(--color-text-light);font-weight:500;font-size:.85rem;white-space:nowrap;padding:.35rem .6rem;border-radius:var(--radius-md);transition:color .15s,background .15s}.header__nav--desktop>a:hover{color:var(--color-text);background:var(--color-code-bg);text-decoration:none}.header__nav--desktop>a.header__nav-active{color:var(--color-primary);font-weight:600;background:color-mix(in srgb,var(--color-primary) 10%,transparent)}.header__nav--desktop>a.header__nav-active:hover{background:color-mix(in srgb,var(--color-primary) 16%,transparent);color:var(--color-primary)}.header__nav--desktop button.theme-toggle{margin-left:.2rem}@media(max-width:768px){.header__nav--desktop{display:none}}.header__mobile-controls{display:none;align-items:center;gap:.35rem}@media(max-width:768px){.header__mobile-controls{display:flex}}.header__mobile-nav{display:none}.header__mobile-nav--open{display:block;padding:0 var(--spacing-md) var(--spacing-md);border-top:1px solid var(--color-border);margin-top:.6rem}.header__mobile-nav-inner{display:flex;flex-direction:column;gap:0}.header__mobile-link{display:block;padding:.65rem 0;color:var(--color-text);font-weight:500;font-size:.95rem;text-decoration:none;border-bottom:1px solid var(--color-border)}.header__mobile-link:hover{color:var(--color-primary);text-decoration:none}.header__mobile-link:last-child{border-bottom:none}.header__mobile-link--active{color:var(--color-primary);font-weight:600}.post-card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:var(--spacing-lg);transition:all var(--transition-base)}.post-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}.post-card{display:block;text-decoration:none;color:inherit}.post-card:hover{text-decoration:none;color:inherit}.post-card *{text-decoration:none}.post-card__image{width:100%;height:200px;object-fit:cover;border-radius:var(--radius-md);margin-bottom:var(--spacing-md)}.post-card__meta{display:flex;flex-wrap:wrap;gap:var(--spacing-sm);font-size:.8rem;color:var(--color-text-light);margin-bottom:var(--spacing-sm)}.post-card__title{font-size:1.25rem;font-weight:700;color:var(--color-text);margin-bottom:var(--spacing-sm);line-height:1.3}.post-card__description{color:var(--color-text-light);margin-bottom:var(--spacing-md);font-size:.9rem;line-height:1.5}.post-card__tags{display:flex;flex-wrap:wrap;gap:var(--spacing-xs)}.tag{display:inline-block;background:var(--color-code-bg);color:var(--color-text);padding:.2rem .6rem;border-radius:var(--radius-md);font-size:.8rem;font-weight:500;transition:all var(--transition-fast)}.tag:hover{background:var(--color-primary);color:var(--color-on-primary);text-decoration:none}.button{background:var(--color-primary);color:var(--color-on-primary);padding:var(--spacing-sm) var(--spacing-lg);border-radius:var(--radius-md);border:none;cursor:pointer;font-weight:600;transition:all var(--transition-fast)}.button:hover{background:var(--color-primary-dark);transform:translateY(-1px)}.button{display:inline-block;text-align:center;text-decoration:none;color:var(--color-on-primary);font-size:.9rem}.button:hover{color:var(--color-on-primary);text-decoration:none}.button--secondary{background:var(--color-surface);color:var(--color-text);border:1px solid var(--color-border)}.button--secondary:hover{background:var(--color-code-bg);border-color:var(--color-primary);color:var(--color-text);text-decoration:none}.grid{display:grid;gap:var(--spacing-lg)}.grid--2{grid-template-columns:repeat(2,1fr)}@media(max-width:768px){.grid--2{grid-template-columns:1fr}}.grid--3{grid-template-columns:repeat(3,1fr)}@media(max-width:1024px){.grid--3{grid-template-columns:repeat(2,1fr)}}@media(max-width:640px){.grid--3{grid-template-columns:1fr}}.hero{text-align:center;padding:var(--spacing-2xl) 0}@media(min-width:769px){.hero{padding:var(--spacing-3xl) 0}}.hero__title{font-size:2.25rem;margin-bottom:var(--spacing-md)}@media(min-width:769px){.hero__title{font-size:3rem}}.hero__description{font-size:1.05rem;color:var(--color-text-light);max-width:600px;margin:0 auto var(--spacing-xl)}@media(min-width:769px){.hero__description{font-size:1.25rem}}.article__header{text-align:center;margin-bottom:var(--spacing-2xl)}.article__title{font-size:1.75rem;margin-bottom:var(--spacing-md)}@media(min-width:769px){.article__title{font-size:2.5rem}}.article__meta{display:flex;justify-content:center;flex-wrap:wrap;gap:var(--spacing-sm);color:var(--color-text-light);font-size:.85rem;margin-bottom:var(--spacing-md)}.article__image{width:100%;height:auto;max-height:400px;object-fit:cover;border-radius:var(--radius-lg);margin-bottom:var(--spacing-2xl)}.article__content{font-size:1.05rem;line-height:1.8}@media(min-width:769px){.article__content{font-size:1.125rem}}.article__content h2{margin-top:var(--spacing-2xl);margin-bottom:var(--spacing-md)}.article__content h3{margin-top:var(--spacing-xl);margin-bottom:var(--spacing-md)}.article__content img{border-radius:var(--radius-md);margin:var(--spacing-xl) 0}.article__content blockquote{border-left:4px solid var(--color-primary);padding-left:var(--spacing-lg);margin:var(--spacing-xl) 0;font-style:italic;color:var(--color-text-light)}.article__content pre{overflow-x:auto;max-width:100%;-webkit-overflow-scrolling:touch}.footer{position:relative;z-index:70;background:var(--color-surface);border-top:1px solid var(--color-border);padding:var(--spacing-2xl) 0 var(--spacing-xl);margin-top:var(--spacing-2xl);color:var(--color-text-light)}@media(min-width:769px){.footer{padding:var(--spacing-3xl) 0 var(--spacing-xl);margin-top:var(--spacing-3xl)}}.footer__grid{display:grid;grid-template-columns:1fr;gap:var(--spacing-xl);margin-bottom:var(--spacing-xl)}@media(min-width:769px){.footer__grid{grid-template-columns:2fr 1fr 1fr;gap:var(--spacing-2xl);margin-bottom:var(--spacing-2xl)}}.footer__brand{max-width:320px}.footer__logo{display:flex;align-items:center;gap:.5rem;font-size:1.15rem;font-weight:700;color:var(--color-text);text-decoration:none;margin-bottom:var(--spacing-sm)}.footer__logo:hover{color:var(--color-primary);text-decoration:none}.footer__tagline{font-size:.85rem;color:var(--color-text-light);line-height:1.6;margin-bottom:var(--spacing-md)}.footer__social{display:flex;gap:.5rem}.footer__social a{display:flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:var(--radius-md);background:var(--color-code-bg);color:var(--color-text-light);text-decoration:none;transition:all var(--transition-fast)}.footer__social a:hover{background:var(--color-primary);color:var(--color-on-primary);text-decoration:none}.footer__social a svg{display:block}.footer__links{display:flex;flex-direction:column;gap:.5rem}.footer__links h4{font-size:.8rem;font-weight:700;color:var(--color-text);text-transform:uppercase;letter-spacing:.05em;margin-bottom:.25rem}.footer__links a{color:var(--color-text-light);font-size:.9rem;text-decoration:none;transition:color var(--transition-fast)}.footer__links a:hover{color:var(--color-primary);text-decoration:none}.footer__bottom{border-top:1px solid var(--color-border);padding-top:var(--spacing-lg);text-align:center;font-size:.8rem}.footer__bottom a{color:var(--color-primary);text-decoration:none}.footer__bottom a:hover{text-decoration:underline}.theme-toggle{background:var(--color-surface);border:1px solid var(--color-border);width:36px;height:36px;border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all var(--transition-fast);color:var(--color-text);flex-shrink:0}.theme-toggle:hover{background:var(--color-code-bg);border-color:var(--color-primary)}.theme-toggle__icon{display:flex;align-items:center;justify-content:center;line-height:1}.theme-toggle svg{display:block}.auth-widget{position:relative}.auth-widget__avatar{border-radius:50%;width:36px;height:36px;cursor:pointer;border:2px solid transparent;transition:transform .2s ease;box-shadow:0 2px 4px #0000001a;object-fit:cover}.auth-widget__avatar:hover{transform:scale(1.05)}.auth-widget__initials{width:36px;height:36px;border-radius:50%;background-color:var(--color-primary, #2563eb);color:var(--color-on-primary);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:.9rem;cursor:pointer;transition:transform .2s ease;box-shadow:0 2px 8px #0003;text-shadow:0 1px 2px rgba(0,0,0,.2);user-select:none}.auth-widget__initials:hover{transform:scale(1.05)}.auth-widget__dropdown{position:absolute;top:150%;right:0;background:var(--color-surface, #1a1a1a);color:var(--color-text, #fff);border:1px solid var(--color-border, #333);border-radius:12px;padding:1.25rem;min-width:240px;box-shadow:0 10px 30px #0006;z-index:1000;display:flex;flex-direction:column;gap:.5rem}.auth-widget__user-info{border-bottom:1px solid var(--color-border, #333);padding-bottom:.75rem;margin-bottom:.5rem}.auth-widget__user-name{font-weight:600;font-size:1rem}.auth-widget__user-email{font-size:.85rem;opacity:.7;word-break:break-all}.auth-widget__link-btn{width:100%;justify-content:flex-start;text-align:left;display:flex;align-items:center;gap:8px}.auth-widget__signout-btn{width:100%;margin-top:.5rem;justify-content:center}.auth-widget__popover{position:absolute;top:120%;right:0;background:var(--color-surface, #1a1a1a);color:var(--color-text, #fff);border:1px solid var(--color-border, #333);border-radius:12px;padding:1.5rem;min-width:260px;box-shadow:0 15px 40px #0006;z-index:1000;display:flex;flex-direction:column;gap:1.2rem}.auth-widget__popover-header{text-align:center}.auth-widget__popover-title{font-weight:700;font-size:1.1rem;margin-bottom:.25rem}.auth-widget__popover-subtitle{font-size:.9rem;opacity:.7}.auth-widget__popover-btn{width:100%;display:flex;justify-content:center;align-items:center;gap:12px;padding:10px}.login-modal-overlay{position:fixed;inset:0;z-index:9999;display:flex;align-items:center;justify-content:center;background:#0009;backdrop-filter:blur(4px);animation:fadeIn .15s ease}.login-modal{position:relative;background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg, 12px);padding:2.5rem 2rem 2rem;min-width:340px;max-width:420px;width:90vw;box-shadow:0 20px 60px #00000080;animation:slideUp .2s ease}.login-modal__close{position:absolute;top:.75rem;right:.75rem;background:none;border:none;color:var(--color-text-light);font-size:1.5rem;cursor:pointer;line-height:1;padding:.25rem .5rem;border-radius:var(--radius-sm, 6px);transition:background .15s,color .15s}.login-modal__close:hover{background:var(--color-border);color:var(--color-text)}.login-modal__header{text-align:center;margin-bottom:1.75rem}.login-modal__title{font-size:1.35rem;font-weight:700;color:var(--color-text);margin-bottom:.35rem}.login-modal__reason{font-size:.95rem;color:var(--color-text-light)}.login-modal__buttons{display:flex;flex-direction:column;gap:.75rem}.login-modal__btn{display:flex;align-items:center;justify-content:center;gap:.75rem;width:100%;padding:.75rem 1rem;border-radius:var(--radius-md, 8px);font-size:.95rem;font-weight:600;cursor:pointer;transition:transform .1s,box-shadow .15s;border:1px solid var(--color-border);background:var(--color-background);color:var(--color-text)}.login-modal__btn:hover{transform:translateY(-1px);box-shadow:0 4px 12px #00000026}.login-modal__btn:active{transform:translateY(0)}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideUp{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}.search{position:relative}.search__input{width:100%;padding:var(--spacing-sm) var(--spacing-md);border:1px solid var(--color-border);border-radius:var(--radius-md);background:var(--color-surface);color:var(--color-text);font-size:1rem}.search__input:focus{outline:none;border-color:var(--color-primary);box-shadow:0 0 0 3px color-mix(in srgb,var(--color-primary) 10%,transparent)}body.dc-site :where(main,section,article,aside,div){min-width:0}body.dc-site :where(button,input,textarea,select){font-family:var(--font-sans)}body.dc-site :where(input,textarea,select){accent-color:var(--color-primary)}body.dc-site :where(a,button,input,textarea,select,summary):focus-visible{outline:3px solid var(--color-focus);outline-offset:3px}body.dc-site :where(h1,h2,h3){overflow-wrap:break-word}body.dc-site :where(a,p){overflow-wrap:anywhere}body.dc-site :where(button,a){-webkit-tap-highlight-color:transparent}body.dc-site .dc-skip{position:fixed;top:-100px;left:16px;z-index:200;padding:12px 20px;border-radius:9px;background:var(--color-surface)}body.dc-site .dc-skip:focus{top:10px}body.dc-site .header{background:var(--color-surface);backdrop-filter:none;padding:12px 0;border-bottom:1px solid var(--color-border)}body.dc-site .header .container{max-width:1600px}body.dc-site .header__inner{min-height:44px;gap:12px}body.dc-site .header__logo{font-size:20px;font-weight:700;letter-spacing:-.05em;gap:9px;color:var(--color-text)}body.dc-site .header__logo span{display:inline}body.dc-site .header__logo>svg{box-sizing:content-box;width:22px;height:22px;padding:9px;border-radius:12px 12px 3px;background:var(--color-primary);color:var(--color-on-primary)}body.dc-site .header__nav--desktop{display:none;gap:3px}body.dc-site .header__nav--desktop>a{font-size:13px;min-height:44px;display:flex;align-items:center;padding:8px 10px}body.dc-site .header__mobile-controls{display:flex;gap:6px}body.dc-site .theme-toggle{width:44px;height:44px;display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--color-border);border-radius:10px;background:transparent;color:var(--color-text-light)}body.dc-site .header__mobile-nav--open{max-height:calc(100dvh - var(--site-header-height));overflow-y:auto;margin-top:12px;padding:12px 16px 20px;background:var(--color-surface)}body.dc-site .header__mobile-nav-inner{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:6px;max-width:700px;margin:auto}body.dc-site .header__mobile-link{padding:11px 14px;min-height:46px;border:0;border-radius:9px;font-size:14px}body.dc-site .header__mobile-link--active{background:var(--dc-sage);color:var(--color-primary)}body.dc-site .header__mobile-account{grid-column:1/-1;display:flex;gap:16px;align-items:center;border-top:1px solid var(--color-border);padding-top:15px;margin-top:10px}body.dc-site .button,body.dc-site .quiz-btn,body.dc-site .tool-btn,body.dc-site .game-btn,body.dc-site .problem-btn{min-height:44px;display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:10px;font-weight:600;line-height:1.4;text-align:center}body.dc-site .button{color:var(--color-on-primary);text-decoration:none}body.dc-site .button--secondary{color:var(--color-text);background:var(--color-surface);border:1px solid var(--color-border)}body.dc-site .button--outline{color:var(--color-primary);background:transparent;border:1px solid var(--color-primary)}body.dc-site .button--outline:hover{background:var(--dc-sage);color:var(--color-primary)}body.dc-site .button--secondary:hover{background:var(--color-code-bg);color:var(--color-text)}body.dc-site .tool-btn--primary,body.dc-site .game-btn--primary{color:var(--color-on-primary)}body.dc-site .footer{background:var(--color-surface);margin-top:40px;padding:36px 0 24px}body.dc-site .footer__grid{gap:28px;margin-bottom:28px}body.dc-site .footer__links h4{font-size:12px;letter-spacing:.1em}body.dc-site .footer__links a{min-height:36px;display:flex;align-items:center;font-size:14px}body.dc-site .footer__social{flex-wrap:wrap}body.dc-site .footer__social a{width:44px;height:44px}body.dc-site .footer__bottom{font-size:12px}body.dc-site .post-card{background:var(--color-surface);border-radius:16px;padding:22px;border-color:var(--color-border);box-shadow:none;display:flex;flex-direction:column}body.dc-site .post-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-sm)}body.dc-site .post-card__title{font-size:21px;font-weight:600;letter-spacing:-.035em;line-height:1.35}body.dc-site .post-card__description{font-size:14px;line-height:1.75}body.dc-site .post-card__meta{font-size:12px;flex-wrap:wrap}body.dc-site .post-card__tags{margin-top:auto;padding-top:12px;gap:8px}body.dc-site .post-card__image{width:100%;aspect-ratio:600/315;height:auto;object-fit:cover;border-radius:10px;margin-bottom:20px}body.dc-site .tag{font-size:12px;border-radius:6px;background:var(--color-code-bg);color:var(--color-text-light);line-height:1.5}body.dc-site a.tag{min-height:36px;display:inline-flex;align-items:center}body.dc-site .tag--active{color:var(--color-on-primary);background:var(--color-primary)}body.dc-site .grid{gap:20px;grid-template-columns:minmax(0,1fr)}body.dc-site .collection-page{padding-block:24px 40px}body.dc-site .tools-filter{justify-content:start;gap:8px;border:0;padding:0;margin-bottom:28px}body.dc-site .tools-filter__btn{min-height:44px;font-size:13px;padding:9px 14px;border-radius:9px}body.dc-site .tools-filter__btn--active{background:var(--color-primary);color:var(--color-on-primary)}body.dc-site .tools-section,body.dc-site .games-section{margin-bottom:32px}body.dc-site .tools-section__title,body.dc-site .games-section__title{font-size:20px;padding-bottom:14px;font-weight:600}body.dc-site .tools-section__count,body.dc-site .games-section__count{font-size:12px;padding:3px 9px}body.dc-site .tools-grid,body.dc-site .games-grid{display:grid;grid-template-columns:minmax(0,1fr);gap:14px}body.dc-site .tool-card{padding:20px;border-radius:14px;gap:14px;align-items:center}body.dc-site .tool-card__icon{width:46px;height:46px;border-radius:13px;background:var(--dc-sage);color:var(--dc-sage-ink)}body.dc-site .tools-section:nth-of-type(2n) .tool-card__icon{background:var(--dc-sky);color:var(--dc-sky-ink)}body.dc-site .tools-section:nth-of-type(3n) .tool-card__icon{background:var(--dc-peach);color:var(--dc-peach-ink)}body.dc-site .tool-card__name{font-size:16px;font-weight:600;margin-bottom:6px}body.dc-site .tool-card__desc{font-size:13px;line-height:1.65;margin:0}body.dc-site .game-card{padding:24px 20px;border-radius:16px;align-items:start;text-align:left}body.dc-site .game-card__icon{width:56px;height:56px;background:var(--dc-sage);border-radius:15px;display:grid;place-items:center;font-size:26px;margin-bottom:18px}body.dc-site .game-card:nth-child(2n) .game-card__icon{background:var(--dc-peach)}body.dc-site .game-card:nth-child(3n) .game-card__icon{background:var(--dc-lavender)}body.dc-site .game-card__name{font-size:18px;font-weight:600;margin-bottom:7px}body.dc-site .game-card__desc{font-size:14px;line-height:1.65;margin:0}body.dc-site .game-card--disabled{opacity:1;background:var(--color-code-bg)}body.dc-site .game-card__badge{font-size:11px;background:var(--color-surface);padding:4px 8px;top:14px;right:14px}body.dc-site .problems-page,body.dc-site .quiz-page{padding-block:24px 40px}body.dc-site .problems-progress{padding:18px;border:1px solid var(--color-border);background:var(--color-surface);border-radius:12px;gap:16px;flex-wrap:wrap}body.dc-site .problems-progress__bar{min-width:100px}body.dc-site .problems-potd-strip{padding:20px;border-radius:16px;background:var(--dc-panel);border-color:var(--dc-panel-line)}body.dc-site .problems-potd-strip__head{gap:12px;flex-wrap:wrap}body.dc-site .problems-potd-card{padding:14px;min-width:160px;border-radius:10px;background:var(--color-surface)}body.dc-site .problems-topic-chips{overflow-x:auto;flex-wrap:nowrap;padding-bottom:8px;gap:8px}body.dc-site .problems-topic-chips__chip{min-height:40px;flex-shrink:0;font-size:13px;padding:8px 12px;border-radius:9px}body.dc-site .problems-filters,body.dc-site .quiz-filters{display:grid;grid-template-columns:minmax(0,1fr);gap:10px;position:static;padding:16px;border:1px solid var(--color-border);border-radius:14px;background:var(--color-surface)}body.dc-site .problems-filters :is(input:not([type=checkbox]),select),body.dc-site .quiz-filters :is(input,select){width:100%;min-width:0;min-height:46px;font-size:16px;border-radius:9px;background:var(--color-background)}body.dc-site .problems-view-toggle{justify-self:start}body.dc-site .problems-view-toggle__btn{min-height:40px;min-width:44px}body.dc-site .problem-table-scroll{border:1px solid var(--color-border);border-radius:14px;background:var(--color-surface)}body.dc-site .problem-table{font-size:14px}body.dc-site .problem-table td{padding:14px 10px}body.dc-site .problem-table th{padding:14px 10px;background:var(--color-code-bg)}body.dc-site .problem-table tr:nth-child(2n){background:var(--color-background)}body.dc-site .problem-grid,body.dc-site .quiz-grid{grid-template-columns:minmax(0,1fr);gap:16px}body.dc-site .quiz-tile,body.dc-site .problem-card{padding:22px;border-radius:15px}body.dc-site .quiz-tile__title{font-size:19px;font-weight:600;line-height:1.4}body.dc-site .quiz-tile__desc{font-size:14px;line-height:1.7}body.dc-site .quiz-badge,body.dc-site .problem-badge{font-size:11px;padding:4px 9px}body.dc-site .quiz-card{border-radius:16px;padding:20px;box-shadow:none}body.dc-site .quiz-option{min-height:52px;border-radius:12px;padding:14px;align-items:start}body.dc-site .quiz-option__marker{margin-top:2px}body.dc-site .quiz-btn{font-size:14px}body.dc-site .quiz-field :is(input,textarea,select){font-size:16px;min-height:44px}body.dc-site .quiz-field-row{grid-template-columns:minmax(0,1fr)}body.dc-site .quiz-builder__question-controls{flex-wrap:wrap}body.dc-site .quiz-builder__correct,body.dc-site .quiz-builder__opt-remove{min-width:44px;min-height:44px}body.dc-site .quiz-builder__option{align-items:start}body.dc-site .article{padding-block:24px 40px}body.dc-site .article-container{max-width:920px}body.dc-site .article__header{text-align:left;padding:28px 0;margin-bottom:0}body.dc-site .article__title{font-size:clamp(30px,4vw,48px);line-height:1.18;letter-spacing:-.045em;font-weight:550}body.dc-site .article__description{font-size:17px;line-height:1.7}body.dc-site .article__meta{font-size:12px;flex-wrap:wrap;justify-content:start}body.dc-site .article__image-wrap{margin-block:16px 32px;border-radius:16px;overflow:hidden}body.dc-site .article__content{font-size:16px;line-height:1.85;overflow-wrap:anywhere}body.dc-site .article__content :is(h2,h3){line-height:1.3;scroll-margin-top:100px}body.dc-site .article__content h2{font-size:26px}body.dc-site .article__content h3{font-size:21px}body.dc-site .article__content img{border-radius:10px}body.dc-site .article__content pre,body.dc-site .article__content .cb{max-width:100%}body.dc-site .course-hero{background:var(--dc-hero);border:1px solid var(--dc-hero-line);border-radius:20px;padding:24px;gap:28px}body.dc-site .course-hero__title{font-size:clamp(30px,4vw,46px);font-weight:550;line-height:1.2}body.dc-site .course-hero__desc{font-size:16px;line-height:1.75}body.dc-site .course-hero__card{background:var(--color-surface);border-radius:15px;box-shadow:none}body.dc-site .lesson-sidebar{top:var(--site-header-height);width:min(312px,90vw)}body.dc-site .lesson-drawer-backdrop{top:var(--site-header-height)}body.dc-site .lesson-sidebar__close,body.dc-site .lesson-content__toggle,body.dc-site .lesson-sidebar__module-toggle{min-height:44px}body.dc-site .lesson-sidebar__lesson{font-size:14px;min-height:44px}body.dc-site .lesson-content{padding:24px 16px}body.dc-site .lesson-content__header{flex-wrap:wrap;gap:12px}body.dc-site .lesson-nav{flex-direction:column;gap:12px}body.dc-site .lesson-nav .button{width:100%;max-width:100%;white-space:normal;text-align:left}body.dc-site .doc-layout{display:flex;flex-direction:column;max-width:1440px;margin:auto}body.dc-site .doc-sidebar{width:100%;position:static;height:auto;border-right:0;padding:20px 16px}body.dc-site .doc-sidebar__nav{flex-direction:row;flex-wrap:nowrap;overflow-x:auto;gap:8px;padding-bottom:8px}body.dc-site .doc-sidebar__link{flex-shrink:0;min-height:44px;display:flex;align-items:center;font-size:14px}body.dc-site .doc-sidebar__link--active{color:var(--color-on-primary)}body.dc-site .doc-content{width:100%;max-width:880px;padding:24px 16px 40px}body.dc-site .doc-nav{flex-direction:column}body.dc-site .tool-page{padding:20px 0 40px}body.dc-site .tool-container{max-width:1500px;padding:0 16px}body.dc-site .tool-crumb{flex-wrap:wrap;gap:9px;margin-bottom:22px;padding-bottom:18px;border-bottom:1px solid var(--color-border)}body.dc-site .tool-crumb a{font-size:13px;min-height:36px;display:inline-flex;align-items:center}body.dc-site .tool-crumb__badge{font-size:11px;opacity:1;white-space:normal;margin-left:0;width:100%}body.dc-site .tool-panel{border-radius:13px}body.dc-site .tool-panel__label{font-size:12px;letter-spacing:.04em;padding:12px 14px}body.dc-site .tool-actions{gap:8px;flex-wrap:wrap;margin-bottom:16px}body.dc-site .tool-btn{font-size:13px}body.dc-site .tool-page--workspace .tool-btn{min-height:32px;padding:.34rem .62rem;border-radius:var(--radius-sm);font-size:.76rem}body.dc-site .tool-input,body.dc-site .tool-select{font-size:16px;min-height:44px}body.dc-site .tool-guide{margin-top:32px}body.dc-site .acc{border-radius:13px}body.dc-site .acc__head{min-height:56px}body.dc-site .problem-ide{height:auto;min-height:calc(100dvh - var(--site-header-height));overflow:visible}body.dc-site .problem-breadcrumbs{flex-wrap:wrap;padding:12px 16px;font-size:12px}body.dc-site .problem-toolbar{padding:12px 16px;flex-wrap:wrap;gap:10px}body.dc-site .problem-toolbar__title{white-space:normal;font-size:18px;width:100%}body.dc-site .problem-toolbar__actions{flex-wrap:wrap}body.dc-site .problem-split{flex-direction:column;overflow:visible}body.dc-site .problem-left{max-height:none;flex:auto;border-right:0;border-bottom:1px solid var(--color-border);overflow:visible}body.dc-site .problem-tab-content{padding:20px 16px;max-height:65dvh;overflow-y:auto}body.dc-site .problem-right{flex:auto;min-height:560px}body.dc-site .problem-editor-area{min-height:340px}body.dc-site .problem-editor-mount{min-height:300px}body.dc-site .problem-tabs{overflow-x:auto;padding-inline:8px}body.dc-site .problem-tabs__btn,body.dc-site .problem-output-tabs__btn{min-height:44px;font-size:13px}body.dc-site .problem-output-area{min-height:160px}body.dc-site .problem-editor-toolbar{flex-wrap:wrap;min-height:52px;gap:8px;padding:10px 12px}body.dc-site .problem-example{border-radius:12px}body.dc-site .problem-desc__title{font-size:25px}body.dc-site .game-page{padding:24px 0 40px}body.dc-site .game-header{padding:22px;border:1px solid var(--dc-hero-line);background:var(--dc-hero);border-radius:17px;margin-bottom:20px}body.dc-site .game-title{font-size:28px}body.dc-site .game-desc{font-size:14px;line-height:1.7}body.dc-site .game-scores{flex-wrap:wrap}body.dc-site .game-score{font-size:13px;padding:10px 14px}body.dc-site .game-canvas-wrap{border-radius:16px}body.dc-site .game-controls{gap:10px}body.dc-site .game-instructions{border-radius:14px;background:var(--color-surface)}body.dc-site .game-instructions summary{min-height:52px;display:flex;align-items:center}@media(min-width:520px){body.dc-site .games-grid,body.dc-site .problems-filters,body.dc-site .quiz-filters{grid-template-columns:repeat(2,minmax(0,1fr))}body.dc-site .problems-filters__input,body.dc-site .quiz-filters__search{grid-column:1/-1}}@media(min-width:700px){body.dc-site .collection-page,body.dc-site .problems-page,body.dc-site .quiz-page{padding-top:32px}body.dc-site :is(.tools-grid,.grid--2,.grid--3,.quiz-grid,.problem-grid){grid-template-columns:repeat(2,minmax(0,1fr))}body.dc-site .quiz-field-row{grid-template-columns:repeat(2,minmax(0,1fr))}body.dc-site .course-hero{padding:36px}body.dc-site .lesson-content{padding:32px}body.dc-site .lesson-nav,body.dc-site .doc-nav{flex-direction:row}body.dc-site .lesson-nav .button{width:auto;max-width:50%}body.dc-site .tool-container{padding-inline:24px}body.dc-site .tool-crumb__badge{width:auto;margin-left:auto}}@media(min-width:1024px){body.dc-site .grid--3,body.dc-site .tools-grid,body.dc-site .quiz-grid,body.dc-site .problem-grid{grid-template-columns:repeat(3,minmax(0,1fr))}body.dc-site .games-grid{grid-template-columns:repeat(4,minmax(0,1fr))}body.dc-site .problems-filters{grid-template-columns:minmax(200px,2fr) repeat(3,minmax(120px,1fr))}body.dc-site .problems-filters__input{grid-column:auto}body.dc-site .quiz-filters{grid-template-columns:minmax(200px,2fr) repeat(2,minmax(160px,1fr))}body.dc-site .quiz-filters__search{grid-column:auto}body.dc-site .doc-layout{flex-direction:row}body.dc-site .doc-sidebar{position:sticky;top:var(--site-header-height);width:250px;height:calc(100dvh - var(--site-header-height));border-right:1px solid var(--color-border);padding:28px 20px}body.dc-site .doc-sidebar__nav{flex-direction:column}body.dc-site .doc-sidebar__link{flex-shrink:1}body.dc-site .doc-content{padding:36px 40px}body.dc-site .problem-ide{height:calc(100dvh - var(--site-header-height));min-height:650px;overflow:hidden}body.dc-site .problem-split{flex-direction:row;overflow:hidden}body.dc-site .problem-left{flex:1 1 50%;border-right:1px solid var(--color-border);border-bottom:0;overflow:hidden}body.dc-site .problem-right{flex:1 1 50%;min-height:0}body.dc-site .problem-tab-content{max-height:none;padding:24px}body.dc-site .problem-toolbar__title{width:auto;font-size:17px}body.dc-site .problem-editor-area,body.dc-site .problem-editor-mount{min-height:0}}@media(min-width:1200px){:root{--site-header-height: 76px}body.dc-site .header{padding-block:16px}body.dc-site .header__nav--desktop{display:flex}body.dc-site .header__mobile-controls,body.dc-site .header__mobile-nav{display:none}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation-duration:.01ms!important;transition-duration:.01ms!important;scroll-behavior:auto!important}}body.dc-site .collection-heading{font-size:clamp(2rem,4vw,3rem);margin-bottom:24px}body.dc-site .tool-intro{margin-bottom:24px;padding-block:8px 24px;border-bottom:1px solid var(--color-border)}body.dc-site .tool-back{display:inline-flex;align-items:center;min-height:44px;font-size:13px;color:var(--color-text-light);margin-bottom:12px}body.dc-site .tool-intro h1{font-size:clamp(1.8rem,3.5vw,2.5rem);margin:0 0 12px}body.dc-site .tool-intro p{max-width:700px;font-size:15px;margin:0 0 12px}body.dc-site .tool-privacy{display:inline-block;font-size:12px;color:var(--dc-sage-ink);background:var(--dc-sage);padding:5px 10px;border-radius:6px}body.dc-site .p-btn{min-height:44px;min-width:44px;padding:9px 12px;border-radius:9px;font-size:13px}body.dc-site .problem-toolbar__actions{flex-shrink:1}body.dc-site .lesson-drawer-toggle,body.dc-site .lesson-sidebar__module-header,body.dc-site .lesson-sidebar__link{min-height:44px}body.dc-site .lesson-sidebar__link{font-size:13px}body.dc-site .quiz__option{min-height:52px;padding:14px;border-radius:10px}body.dc-site .tool-output{font-size:14px;line-height:1.7}body.dc-site .quiz-dots{gap:8px;justify-content:flex-start}body.dc-site .quiz-dot{width:44px;height:44px;font-size:13px;font-weight:600;color:var(--color-text-light);border-radius:10px}body.dc-site .quiz-dot--done{color:var(--color-primary);background:var(--dc-sage);border-color:var(--dc-sage-ink)}body.dc-site .quiz-dot--current{color:var(--color-on-primary);background:var(--color-primary);border-color:var(--color-primary);transform:none}
