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50%);border-color:#0000;transform:translateY(-.25rem)}.social__link:hover:before{transform:translateY(0)}.social__link:hover svg{mix-blend-mode:normal}.site-footer__group{font-size:var(--fs-text-sm);color:var(--site-fg-2);transition:color var(--d-hover) var(--ease);align-items:center;gap:.5rem;margin-top:.25rem;text-decoration:none;display:inline-flex}.site-footer__group:hover{color:var(--site-accent-text)}.site-footer__bar{border-top:1px solid var(--site-line);justify-content:center;padding-block:1.5rem;display:flex}.site-footer__rights{font-size:var(--fs-text-sm);color:var(--site-fg-2)}.site-footer__signoff{isolation:isolate;position:relative}.footer-dragons{inset-inline:0;z-index:1;pointer-events:none;justify-content:space-between;display:flex;position:absolute;bottom:-8%}.footer-dragons__one{aspect-ratio:16/9;opacity:.62;width:min(34vw,24rem);display:block}.footer-dragons__one--flip{transform:scaleX(-1)}@media (max-width:63.99rem){.footer-dragons{display:none}}.site-footer__watermark{z-index:2;font-size:clamp(2rem,13vw,11rem);font-weight:var(--fw-bold);letter-spacing:-.035em;text-align:center;white-space:nowrap;color:#0000;background:linear-gradient(180deg, color-mix(in oklch, var(--p-400), transparent 28%) 0%, color-mix(in oklch, var(--p-600), transparent 58%) 52%, color-mix(in oklch, var(--p-800), transparent 88%) 100%);-webkit-text-stroke:1px color-mix(in oklch, var(--p-500), transparent 78%);-webkit-user-select:none;user-select:none;pointer-events:none;-webkit-background-clip:text;background-clip:text;margin-top:clamp(1.5rem,4vw,3rem);margin-bottom:-.06em;padding-inline:1rem;line-height:1.08;display:block;position:relative}@media (prefers-color-scheme:light){:root:not([data-theme=dark]) .site-footer__watermark{background:linear-gradient(180deg, color-mix(in oklch, var(--p-700), transparent 62%) 0%, color-mix(in oklch, var(--p-800), transparent 80%) 52%, color-mix(in oklch, var(--p-900), transparent 92%) 100%);-webkit-text-stroke:1px color-mix(in oklch, var(--p-700), transparent 88%);-webkit-background-clip:text;background-clip:text}}:root[data-theme=light] .site-footer__watermark{background:linear-gradient(180deg, color-mix(in oklch, var(--p-700), transparent 62%) 0%, color-mix(in oklch, var(--p-800), transparent 80%) 52%, color-mix(in oklch, var(--p-900), transparent 92%) 100%);-webkit-text-stroke:1px color-mix(in oklch, var(--p-700), transparent 88%);-webkit-background-clip:text;background-clip:text}.wordmark--lg .wordmark__name{font-size:1.5rem}.wordmark--lg .wordmark__tag{font-size:.6875rem}@media (min-width:64rem){.rail__lead-2{display:block}}@media (max-width:79.99rem){.tracks__card{width:min(30vw,21.875rem)}.tracks__card--active{width:min(34vw,24.375rem)}}@media (max-width:63.99rem){.rail{min-height:0;display:block}.rail__viewport{scroll-snap-type:x mandatory;scrollbar-width:none;overflow-x:auto}.rail__viewport::-webkit-scrollbar{display:none}.rail__card{scroll-snap-align:center;width:min(78vw,20rem)}.rail__progress{display:none}.hero__body{grid-template-columns:minmax(0,1fr);align-content:end;padding-bottom:3rem}.hero__copy{grid-column:1}.hero__scrim{background:linear-gradient(to top, var(--site-ink) 16%, color-mix(in oklch, var(--site-ink), transparent 24%) 54%, transparent 94%), color-mix(in oklch, var(--site-ink), transparent 60%)}.about__grid{grid-template-columns:minmax(0,1fr)}.about__portrait{max-width:26rem;margin-inline:auto}.lab__split{grid-template-columns:minmax(0,1fr)}.lab__console{border-inline-start:0}.lab__editor{border-bottom:1px solid var(--site-ink-line)}.tracks__stage{flex-direction:column;gap:1.5rem;min-height:0;padding-bottom:1rem;display:flex}.tracks__card,.tracks__card--start,.tracks__card--end,.tracks__card--active{width:100%;max-width:28rem;margin-inline:auto;position:static;inset:auto;transform:none}.tracks__cutout,.tracks__spot{display:none}.site-footer__grid{grid-template-columns:repeat(2,minmax(0,1fr))}.site-footer__brand{grid-column:1/-1}}@media (max-width:47.99rem){.site-footer__grid{grid-template-columns:minmax(0,1fr)}.site-footer__bar{flex-direction:column;align-items:flex-start}.footer-cta__actions .site-btn{width:100%}.hero__stats{gap:1rem 1.25rem}.hero__stat{padding-inline-start:1.25rem}.lab__toolbar{gap:.5rem}.lab__actions{width:100%;margin-inline-start:0}}.profile__card{border-radius:var(--r-lg);border:1px solid var(--site-line);background:var(--site-card);max-width:56rem;box-shadow:var(--site-shadow-lg);text-align:center;margin-inline:auto;padding:0 clamp(1rem,3vw,2rem) clamp(1.5rem,3vw,2.25rem);position:relative}.profile__banner{border-radius:var(--r-lg) var(--r-lg) 0 0;background:radial-gradient(ellipse 60% 120% at 20% 0%, rgb(var(--p-rgb) / .35), transparent 70%), linear-gradient(120deg, var(--site-ink), color-mix(in oklch, var(--site-ink), var(--p-700) 35%));height:8.5rem;margin-inline:calc(-1*clamp(1rem,3vw,2rem))}.profile__tier{inset-inline-start:clamp(1rem,3vw,2rem);border:1px solid color-mix(in oklch, var(--p-400), transparent 55%);background:color-mix(in oklch, var(--site-ink), transparent 25%);color:var(--p-300);font-size:var(--fs-text-xs);font-weight:var(--fw-medium);border-radius:999px;align-items:center;gap:.4rem;padding:.3rem .75rem;display:inline-flex;position:absolute;top:1rem}.profile__avatar{aspect-ratio:1;border:4px solid var(--site-card);outline:2px solid color-mix(in oklch, var(--p-400), transparent 45%);background:var(--site-card-2);border-radius:50%;width:8.5rem;margin:-4.25rem auto 0;position:relative;overflow:hidden}.profile__avatar>*{object-fit:cover;width:100%;height:100%}.profile__name{font-size:clamp(1.35rem,2.6vw,1.75rem);font-weight:var(--fw-bold);letter-spacing:var(--tracking-tight);margin-top:.9rem}.profile__role{font-size:var(--fs-text-sm);color:var(--site-muted);margin-top:.3rem}.profile__stats{border-radius:var(--r-md,.75rem);background:var(--site-card-2);border:1px solid var(--site-line);grid-template-columns:repeat(3,1fr);margin-top:1.25rem;padding:.9rem 0;display:grid}.profile__stat+.profile__stat{border-inline-start:1px solid var(--site-line)}.profile__stat-n{font-size:clamp(1.1rem,2.2vw,1.4rem);font-weight:var(--fw-bold)}.profile__stat-l{font-size:var(--fs-text-xs);color:var(--site-muted);margin-top:.15rem}.profile__actions{gap:.75rem;margin-top:1rem;display:flex}.profile__action{flex:1;justify-content:center}.profile__tabs{background:var(--site-card-2);border:1px solid var(--site-line);border-radius:999px;gap:.5rem;margin-top:1.25rem;padding:.3rem;display:flex}.profile__tab{color:var(--site-muted);font:inherit;font-size:var(--fs-text-sm);cursor:pointer;transition:background var(--d-hover) var(--ease), color var(--d-hover) var(--ease);background:0 0;border:0;border-radius:999px;flex:1;justify-content:center;align-items:center;gap:.4rem;padding:.55rem .75rem;display:inline-flex}.profile__tab:hover{color:var(--site-fg)}.profile__tab.is-active{background:var(--site-card);color:var(--site-fg);font-weight:var(--fw-medium);box-shadow:var(--site-shadow-sm,0 1px 2px #00000014)}.profile__grid{text-align:start;grid-template-columns:repeat(auto-fill,minmax(15rem,1fr));gap:clamp(.75rem,2vw,1.25rem);margin-top:1.25rem;list-style:none;display:grid}.profile__empty{color:var(--site-muted);font-size:var(--fs-text-sm);margin-top:2rem}@media (max-width:40rem){.profile__banner{height:6.5rem}.profile__avatar{width:6.5rem;margin-top:-3.25rem}.profile__actions{flex-direction:column}.profile__grid{grid-template-columns:1fr}}.profile__tile{aspect-ratio:16/10;border-radius:var(--r-lg);border:1px solid var(--site-line);background:radial-gradient(ellipse 70% 90% at 30% 0%, rgb(var(--p-rgb) / .16), transparent 70%), linear-gradient(150deg, var(--site-card-2), color-mix(in oklch, var(--site-card-2), var(--site-ink) 8%))}
.statband{border:1px solid var(--site-line);border-radius:var(--r-lg);background:var(--site-line);grid-template-columns:repeat(2,minmax(0,1fr));gap:1px;display:grid;overflow:hidden}@media (min-width:48rem){.statband{grid-template-columns:repeat(4,minmax(0,1fr))}}.statband__cell{text-align:center;background:var(--site-card);transition:background-color var(--d-hover) var(--ease);flex-direction:column;align-items:center;gap:.5rem;padding:clamp(1.5rem,3vw,2.25rem) 1rem;display:flex}.statband__cell:hover{background:var(--site-card-2)}.statband__n{font-size:clamp(1.75rem,3vw,2.5rem);line-height:1.1;font-weight:var(--fw-bold);color:var(--site-accent-text)}.statband__l{font-size:var(--fs-text-sm);color:var(--site-fg-2);line-height:1.6}.quotes{grid-template-columns:repeat(auto-fit,minmax(min(100%,20rem),1fr));gap:1.25rem;display:grid}.quotes__card{background:var(--site-card);flex-direction:column;gap:1rem;height:100%;padding:1.75rem 1.5rem 1.5rem;display:flex;position:relative}.quotes__card:hover{border-color:var(--site-line-strong);box-shadow:var(--site-shadow-md)}.quotes__mark{top:.25rem;font-size:3.5rem;line-height:1;font-family:var(--font-mono);color:color-mix(in oklch, var(--p-500), transparent 78%);pointer-events:none;position:absolute;inset-inline-start:1.25rem}.quotes__body{font-size:var(--fs-text-base);color:var(--site-fg);margin:0;line-height:1.9;position:relative}.quotes__who{font-size:var(--fs-text-sm);font-weight:var(--fw-medium);color:var(--site-fg-2);align-items:center;gap:.625rem;margin-top:auto;padding-top:.5rem;display:flex}.quotes__avatar{background:color-mix(in oklch, var(--p-500), transparent 84%);width:2rem;height:2rem;color:var(--site-accent-text-strong);font-weight:var(--fw-bold);border-radius:50%;flex:none;place-items:center;display:grid}.closer__panel{isolation:isolate;text-align:center;border-radius:var(--r-lg);background:radial-gradient(70% 120% at 50% 0%, rgb(var(--p-rgb) / .34), transparent 66%), var(--site-ink);color:var(--site-ink-fg);flex-direction:column;align-items:center;gap:1rem;padding:clamp(2.5rem,6vw,4.5rem) clamp(1.25rem,4vw,3rem);display:flex;position:relative;overflow:hidden}.closer__title{font-size:clamp(1.75rem,3.4vw,2.75rem);line-height:1.25;font-weight:var(--fw-bold);letter-spacing:var(--tracking-tight);color:#fff}.closer__lead{max-width:34rem;color:var(--site-ink-fg-2);font-size:clamp(1rem,1.4vw,1.125rem);line-height:1.75}.closer__panel .site-btn{margin-top:.5rem}
.page-head{padding-top:calc(var(--site-nav-h) + clamp(2rem, 5vw, 4rem));text-align:center;padding-bottom:clamp(1.5rem,3vw,2.5rem);position:relative}.page-head .site-lead{max-width:40rem;margin-inline:auto}.page-title{font-size:clamp(1.75rem,4vw,2.75rem);font-weight:var(--fw-bold);letter-spacing:var(--tracking-tight);color:var(--site-fg)}.page-empty{text-align:center;color:var(--site-fg-2);padding:3rem 1.5rem}.filters{flex-wrap:wrap;justify-content:center;gap:.625rem;margin-block:1.5rem 2.5rem;display:flex}.filters__pill{border-radius:var(--r-full);background:var(--site-card-2);color:var(--site-fg-2);font-size:var(--fs-text-sm);font-weight:var(--fw-semibold);transition:background-color var(--d-hover) var(--ease), color var(--d-hover) var(--ease);border:1px solid #0000;padding:.5rem 1.125rem;text-decoration:none}.filters__pill:hover{color:var(--site-fg)}.filters__pill[aria-current=true]{background:var(--site-accent-solid);color:var(--site-on-accent)}.catalog-panel{border:1px solid var(--site-line);background:var(--site-bg-tint);border-radius:1.5rem;margin-bottom:clamp(3rem,6vw,5rem);padding:clamp(1rem,2.5vw,2rem)}.catalog-panel .courses__grid{margin-top:0}.essentials-hero{isolation:isolate;padding-top:calc(var(--site-nav-h) + clamp(2.5rem, 6vw, 5rem));text-align:center;background:var(--site-bg-tint);padding-bottom:clamp(2.5rem,6vw,5rem);position:relative;overflow:hidden}.essentials-hero__fluid{z-index:0;opacity:.5;mix-blend-mode:multiply;pointer-events:none;position:absolute;inset:0}.essentials-hero__fluid>*{width:100%;height:100%}:root[data-theme=dark] .essentials-hero__fluid{opacity:.72;mix-blend-mode:screen}@media (prefers-color-scheme:dark){:root:not([data-theme=light]) .essentials-hero__fluid{opacity:.72;mix-blend-mode:screen}}.essentials-hero__wash{z-index:1;pointer-events:none;background:radial-gradient(ellipse 50% 60% at 50% 0%, rgb(var(--p-rgb) / .16), transparent 70%), radial-gradient(ellipse 40% 50% at 88% 100%, rgb(var(--p-rgb) / .1), transparent 70%);position:absolute;inset:0}.essentials-hero>.site-shell{z-index:2;position:relative}.essentials-hero .site-lead{max-width:42rem;margin-inline:auto}.code-chip{color:#0a7e3a;color:lab(46.059% -42.549 28.3829);font-family:var(--font-mono);white-space:nowrap;direction:ltr;background:#3bb3601f;background:lab(64.8879% -48.3815 31.9815/.12);border:1px solid #3bb3604d;border:1px solid lab(64.8879% -48.3815 31.9815/.3);border-radius:.375rem;margin-inline:.25rem;padding:.125rem .5rem;font-size:.875em;display:inline-block}:root[data-theme=dark] .code-chip{color:#7cdd93;color:lab(80.9122% -41.9773 27.3574)}@media (prefers-color-scheme:dark){:root:not([data-theme=light]) .code-chip{color:#7cdd93;color:lab(80.9122% -41.9773 27.3574)}}.terms__grid{grid-template-columns:repeat(auto-fill,minmax(min(100%,17rem),1fr));gap:1.25rem;margin-top:2.5rem;padding:0;list-style:none;display:grid}.term{border:1px solid var(--site-line);background:var(--site-card);transition:border-color var(--d-hover) var(--ease), transform var(--d-hover) var(--ease);border-radius:.875rem;padding:1.25rem;position:relative}.term:hover{border-color:var(--site-line-strong);transform:translateY(-.1875rem)}.spotgrid{isolation:isolate;position:relative}.spotgrid__spot{z-index:2;width:var(--spot-r,320px);height:var(--spot-r,320px);margin:calc(var(--spot-r,320px) / -2);opacity:0;pointer-events:none;mix-blend-mode:plus-lighter;background:radial-gradient(circle, rgb(var(--p-rgb) / .16), transparent 62%);will-change:transform, opacity;border-radius:50%;position:absolute;top:0;left:0}.term:after{content:"";z-index:1;border-radius:inherit;background:radial-gradient(18rem circle at var(--mx,-100%) var(--my,-100%), var(--p-400), transparent 45%);-webkit-mask-composite:xor;opacity:0;transition:opacity var(--d-hover) var(--ease);pointer-events:none;padding:1px;position:absolute;inset:0;-webkit-mask-image:linear-gradient(#000 0 0),linear-gradient(#000 0 0);mask-image:linear-gradient(#000 0 0),linear-gradient(#000 0 0);-webkit-mask-position:0 0,0 0;mask-position:0 0,0 0;-webkit-mask-size:auto,auto;mask-size:auto,auto;-webkit-mask-repeat:repeat,repeat;mask-repeat:repeat,repeat;-webkit-mask-clip:content-box,border-box;mask-clip:content-box,border-box;-webkit-mask-origin:content-box,border-box;mask-origin:content-box,border-box;-webkit-mask-composite:xor;mask-composite:exclude;-webkit-mask-source-type:auto,auto;mask-mode:match-source,match-source}.spotgrid:hover .term:after{opacity:1}.term__head{justify-content:space-between;align-items:baseline;gap:.75rem;display:flex}.term__n{font-family:var(--font-mono);color:var(--site-fg-2);direction:ltr;font-size:.6875rem}.term__en{font-family:var(--font-mono);font-size:var(--fs-text-sm);font-weight:var(--fw-bold);color:var(--site-accent-text);direction:ltr}.term__ar{font-size:var(--fs-title-4);font-weight:var(--fw-bold);color:var(--site-fg);margin-top:.5rem}.term__body{font-size:var(--fs-text-sm);color:var(--site-fg-2);margin-top:.375rem;line-height:1.7}.course-hero{padding-top:calc(var(--site-nav-h) + clamp(2rem, 5vw, 3.5rem));background:linear-gradient(150deg, var(--p-700), var(--p-900) 70%, var(--p-950));color:#fff;padding-bottom:clamp(6rem,12vw,9rem);position:relative}.course-hero__back{font-size:var(--fs-text-sm);color:#fffc;align-items:center;gap:.5rem;text-decoration:none;display:inline-flex}.course-hero__back:hover{color:#fff}.course-hero__title{font-size:clamp(1.75rem,4vw,2.75rem);font-weight:var(--fw-bold);letter-spacing:var(--tracking-tight);margin-top:1.25rem;line-height:1.25}.course-hero__sub{font-size:var(--fs-text-base);color:#ffffffc7;margin-top:.5rem}.course-detail{grid-template-columns:minmax(0,.8fr) minmax(0,1.2fr);align-items:start;gap:clamp(1.5rem,3vw,2.5rem);margin-top:clamp(-5rem,-8vw,-3.5rem);padding-bottom:clamp(3rem,6vw,5rem);display:grid}.course-aside{z-index:1;border:1px solid var(--site-line);background:var(--site-card);box-shadow:var(--site-shadow-lg);border-radius:1.25rem;padding:1rem;position:relative}.course-aside__thumb{aspect-ratio:16/10;background:radial-gradient(120% 100% at 18% 0%, rgb(var(--p-rgb) / .3), transparent 62%), linear-gradient(150deg, var(--site-ink-2), var(--site-ink));border-radius:.875rem;place-items:center;display:grid;position:relative;overflow:hidden;box-shadow:inset 0 0 0 1px #ffffff12}.course-aside__thumb img{object-fit:cover;width:100%;height:100%}.course-aside__free{color:#007230;color:lab(41.4075% -42.703 28.6805);font-size:var(--fs-text-sm);font-weight:var(--fw-semibold);text-align:center;background:#3bb3601a;background:lab(64.8879% -48.3815 31.9815/.1);border:1px solid #3bb36061;border:1px solid lab(64.8879% -48.3815 31.9815/.38);border-radius:.625rem;margin-top:1rem;padding:.75rem;display:block}:root[data-theme=dark] .course-aside__free{color:#7cdd93;color:lab(80.9122% -41.9773 27.3574)}@media (prefers-color-scheme:dark){:root:not([data-theme=light]) .course-aside__free{color:#7cdd93;color:lab(80.9122% -41.9773 27.3574)}}.course-aside__label{font-size:var(--fs-text-xs);color:var(--site-fg-2);margin-top:1.25rem}.course-aside__list{flex-wrap:wrap;gap:.5rem 1rem;margin-top:.625rem;padding:0;list-style:none;display:flex}.course-aside__list li{font-size:var(--fs-text-sm);color:var(--site-fg);align-items:center;gap:.375rem;display:inline-flex}.course-aside__list svg{color:var(--site-accent-text);flex:none}.course-panel{border:1px solid var(--site-line);background:var(--site-card);border-radius:1.25rem;padding:clamp(1.25rem,2.5vw,2rem)}.course-panel+.course-panel{margin-top:1.25rem}.course-panel__h{font-size:var(--fs-title-3);font-weight:var(--fw-bold);color:var(--site-fg)}.course-panel__body{font-size:var(--fs-text-base);color:var(--site-fg-2);margin-top:.75rem;line-height:1.85}.course-locked__frame{aspect-ratio:16/9;background:radial-gradient(120% 100% at 18% 0%, rgb(var(--p-rgb) / .3), transparent 62%), linear-gradient(150deg, var(--site-ink-2), var(--site-ink));border-radius:.875rem;place-items:center;display:grid;position:relative;overflow:hidden;box-shadow:inset 0 0 0 1px #ffffff12}.course-locked__frame img{object-fit:cover;opacity:.45;width:100%;height:100%;position:absolute;inset:0}.course-locked__badge{color:#fff;background:#0000008c;border-radius:999px;place-items:center;width:4rem;height:4rem;display:grid;position:relative;box-shadow:inset 0 0 0 1px #ffffff38}.course-start{margin-top:1.25rem}.course-start__note{text-align:center;font-size:var(--fs-text-sm);color:var(--site-fg-2);margin-top:.625rem}.course-start__error{text-align:center;font-size:var(--fs-text-sm);color:var(--err);margin-top:.625rem}.section-row{border:1px solid var(--site-line);border-radius:.875rem;overflow:hidden}.section-row+.section-row{margin-top:.875rem}.section-row__q{cursor:pointer;background:var(--site-accent-solid);color:var(--site-on-accent);font-weight:var(--fw-semibold);justify-content:space-between;align-items:center;gap:1rem;padding:1rem 1.25rem;list-style:none;display:flex}.section-row__q::-webkit-details-marker{display:none}.section-row__count{font-family:var(--font-mono);font-size:var(--fs-text-xs);direction:ltr}.section-row__lessons{background:var(--site-card-2);margin:0;padding:.5rem .75rem;list-style:none}.lesson-row{font-size:var(--fs-text-sm);color:var(--site-fg);align-items:center;gap:.75rem;padding:.625rem .5rem;display:flex}.lesson-row+.lesson-row{border-top:1px solid var(--site-line)}.lesson-row__icon{color:var(--site-accent-text);flex:none}.lesson-row__title{flex:1;min-width:0}.lesson-row__badge{background:color-mix(in oklch, var(--p-500), transparent 84%);color:var(--site-accent-text);font-size:var(--fs-text-xs);font-weight:var(--fw-semibold);border-radius:.4375rem;flex:none;padding:.25rem .625rem}.lesson-row__time{font-family:var(--font-mono);font-size:var(--fs-text-xs);color:var(--site-fg-2);direction:ltr;flex:none}@media (max-width:63.99rem){.course-detail{grid-template-columns:minmax(0,1fr)}}