.ph-page{--ph-bg:#080808;--ph-fg:#f5f5f5;--ph-sans:var(--pitma-font-sans);--ph-mono:var(--pitma-font-mono);--ph-spectrum:linear-gradient(110deg,#3fb95000,#3fb950 22%,#3fb950 78%,#3fb95000);--ph-muted:#969696;--ph-line:#282828;background:var(--ph-bg);color:var(--ph-fg);--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;min-height:100dvh;font-family:var(--ph-sans);font-size:15px;font-weight:400;overflow-x:clip}.ph-page *{box-sizing:border-box}.ph-page h1,.ph-page h2,.ph-page h3,.ph-page p{margin:0}.ph-page a{color:inherit;text-decoration:none}.ph-page button{font-family:var(--ph-sans);cursor:pointer;color:inherit;background:0 0;border:0}.ph-page button:disabled{opacity:.25;cursor:default}.ph-page :focus-visible{outline-offset:5px;outline:2px solid #cfcfcf}.ph-mono{font-family:var(--ph-mono);letter-spacing:.08em;font-size:14px;line-height:1.5}.ph-skip{background:var(--ph-fg);z-index:500;padding:12px;position:absolute;top:-70px;left:24px;color:var(--ph-bg)!important}.ph-skip:focus{top:12px}.ph-header{border-bottom:1px solid #202020;align-items:center;gap:64px;max-width:1600px;height:100px;margin:auto;padding:0 64px;display:flex}.ph-logo{flex-shrink:0;width:170px}.ph-logo img{object-fit:contain;width:100%;height:48px;display:block}.ph-header nav{align-items:center;gap:32px;height:100%;display:flex}.ph-header nav a{color:#999;font-size:14px;position:relative}.ph-header nav a[aria-current]{color:var(--ph-fg)}.ph-header nav a[aria-current]:after{content:"";background:var(--ph-fg);height:2px;position:absolute;bottom:-39px;left:0;right:0}.ph-header__right{align-items:center;gap:32px;margin-left:auto;display:flex}.ph-plus{font-family:var(--ph-sans);letter-spacing:.09em;white-space:nowrap;font-size:14px}.ph-plus span{color:#c3c3c3;border:1px solid #484848;border-radius:3px;margin-left:4px;padding:4px 5px;font-size:14px}.ph-account{position:relative}.ph-account summary{cursor:pointer;width:38px;height:38px;font-family:var(--ph-sans);background:var(--ph-bg);border:1px solid #555;border-radius:50%;place-items:center;list-style:none;display:grid}.ph-account summary::-webkit-details-marker{display:none}.ph-account>div{background:var(--ph-bg);z-index:250;border:1px solid #333;width:190px;padding:10px;position:absolute;top:50px;right:0;box-shadow:0 12px 30px #0008}.ph-account a,.ph-account button{text-align:left;width:100%;padding:12px;font-size:14px;display:block}.ph-account a:hover,.ph-account button:hover{background:#292929}.ph-main{max-width:1600px;margin:auto;padding:32px 64px 0}.ph-hero{background:var(--ph-bg);border:1px solid #303030;border-radius:14px;grid-template-columns:1fr 1fr;align-items:center;min-height:550px;padding:48px 48px 88px;display:grid;position:relative;overflow:hidden}.ph-hero:after{content:"";background:var(--ph-spectrum);opacity:.7;height:2px;position:absolute;bottom:0;left:8%;right:8%}.ph-hero__copy{z-index:2;padding-right:10px;animation:.4s ease-out ph-reveal;position:relative}.ph-hero h1{letter-spacing:-.055em;text-wrap:balance;overflow-wrap:anywhere;max-width:640px;font-size:clamp(32px,3.5vw,58px);font-weight:600;line-height:1.14}.ph-hero__meta{color:#bababa;flex-wrap:wrap;align-items:center;gap:9px;margin-top:22px;font-size:14px;display:flex}.ph-hero__meta i{background:#656565;border-radius:50%;width:3px;height:3px}.ph-hero__description{color:#a7a7a7;-webkit-line-clamp:3;-webkit-box-orient:vertical;max-width:465px;font-size:14px;line-height:1.8;display:-webkit-box;overflow:hidden;margin-top:18px!important}.ph-hero__actions{align-items:center;gap:26px;margin-top:30px;display:flex}.ph-watch{font-family:var(--ph-sans);background:var(--ph-fg);white-space:nowrap;border-radius:6px;justify-content:center;align-items:center;gap:13px;padding:16px 23px;font-size:14px;transition:background .2s;display:inline-flex;color:var(--ph-bg)!important}.ph-watch:hover{background:#cacaca}.ph-watch>span{font-size:14px}.ph-browse{font-family:var(--ph-sans);align-items:center;gap:18px;font-size:14px;display:flex;color:#bbb!important}.ph-browse:hover{color:var(--ph-fg)!important}.ph-hero__visual{pointer-events:none;width:53%;height:100%;position:absolute;top:0;right:0}.ph-hero__bottom{z-index:5;align-items:center;gap:25px;display:flex;position:absolute;bottom:27px;left:48px;right:36px}.ph-hero__count{letter-spacing:0;font-size:14px}.ph-hero__count>span{color:#666}.ph-hero__dots{gap:8px;display:flex}.ph-hero__dots button{width:38px;padding:12px 0}.ph-hero__dots button>span{background:#444;height:2px;transition:background .2s;display:block}.ph-hero__dots button[aria-current]>span{background:#d2d2d2}.ph-hero__controls{gap:12px;margin-left:auto;display:flex}.ph-hero__controls button{border:1px solid #424242;border-radius:50%;place-items:center;width:34px;height:34px;font-size:17px;display:grid}.ph-hero__controls button:hover{background:#333}.lesson-art{background:var(--ph-bg);isolation:isolate;width:100%;height:100%;min-height:150px;position:relative;overflow:hidden}.lesson-art__grid{background-image:linear-gradient(#ffffff06 1px,#0000 1px),linear-gradient(90deg,#ffffff06 1px,#0000 1px);background-size:32px 32px;position:absolute;inset:0;-webkit-mask-image:radial-gradient(#000,#0000 70%);mask-image:radial-gradient(#000,#0000 70%)}.lesson-art__sphere{filter:drop-shadow(0 0 12px #adadad30);width:78%;height:90%;position:absolute;top:4%;left:12%;transform:rotate(-8deg)}.lesson-art__brackets{font-family:var(--ph-mono);color:#cecece;text-shadow:0 0 34px #afafaf45;justify-content:center;align-items:center;gap:10%;font-size:clamp(85px,10vw,145px);font-weight:400;display:flex;position:absolute;inset:9% 0 14%;transform:rotate(-9deg)}.lesson-art__brackets span:last-child{color:#a8a8a8}.lesson-art--python,.lesson-art--data{background:var(--ph-bg)}.lesson-art__matrix{grid-template-columns:repeat(8,1fr);gap:4px;display:grid;position:absolute;inset:15% 25% 20%;transform:perspective(400px)rotateX(26deg)rotate(-18deg)}.lesson-art__matrix span{aspect-ratio:1;background:#cecece;border:1px solid #efefef}.lesson-art--hero{background:0 0;min-height:0}.lesson-art--hero .lesson-art__grid{opacity:.8;background-size:42px 42px}.lesson-art--hero .lesson-art__sphere{opacity:.9;width:85%;height:84%;top:0;left:10%}.lesson-art--hero .lesson-art__brackets{gap:12%;font-size:240px;inset:0 0 15%}.lesson-art--hero .lesson-art__matrix{gap:8px;inset:15% 22% 26%}.ph-library{margin-top:64px;scroll-margin-top:24px}.ph-library__heading{border-bottom:1px solid #292929;justify-content:space-between;align-items:flex-end;gap:24px;padding-bottom:35px;display:flex}.ph-library__heading .ph-mono{color:#7f7f7f;margin-bottom:12px}.ph-library__heading h2{letter-spacing:-.035em;font-size:24px;font-weight:500}.ph-search{background:var(--ph-bg);border:1px solid #333;border-radius:6px;flex-shrink:0;align-items:center;gap:12px;width:260px;padding:12px 15px;display:flex}.ph-search>span{color:#999;font-size:22px;line-height:1}.ph-search input{font-family:var(--ph-sans);width:100%;min-width:0;color:var(--ph-fg);background:0 0;border:0;font-size:14px;outline:none!important}.ph-search:focus-within{border-color:#9b9b9b}.ph-search input::placeholder{color:#848484}.ph-search-count{color:#aaa;font-size:14px;margin-top:24px!important}.ph-collection{border-bottom:1px solid #242424;padding-top:36px;padding-bottom:30px;position:relative}.ph-collection__heading{justify-content:space-between;align-items:center;gap:20px;display:flex}.ph-collection__heading .ph-mono{color:#818181;margin-bottom:10px;font-size:14px}.ph-collection__heading h2{letter-spacing:-.035em;font-size:25px;font-weight:500;line-height:1.3}.ph-collection__heading p:last-child{color:#999;margin-top:9px;font-size:14px;line-height:1.6}.ph-collection__total{color:#777;white-space:nowrap;padding-right:136px;font-size:14px}.cf-carousel{--cf-card:clamp(240px,24vw,330px);margin-top:8px;position:relative}.cf-controls{align-items:center;gap:8px;display:flex;position:absolute;top:-72px;right:0}.cf-controls>.ph-mono{display:none}.cf-controls button{border:1px solid #363636;border-radius:50%;width:36px;height:36px;font-size:18px}.cf-controls button:hover:enabled{background:#282828}.cf-frame{perspective:1100px;touch-action:pan-y;cursor:grab;padding:32px 0 25px;overflow:hidden}.cf-frame:active{cursor:grabbing}.cf-stage{height:calc(var(--cf-card)*.92);transform-style:preserve-3d;-webkit-user-select:none;user-select:none;position:relative}.cf-card{width:var(--cf-card);height:calc(var(--cf-card)*.92);background:var(--ph-bg);will-change:transform;border:1px solid #333;border-radius:10px;position:absolute;top:0;left:50%;overflow:hidden;transform:translate(-50%);box-shadow:0 10px 35px #0008}.cf-card--active{border-color:#727272}.cf-card>.lesson-art{height:calc(100% - 110px);min-height:0}.cf-card__copy{background:var(--ph-bg);border-top:1px solid #2a2a2a;height:110px;padding:16px 18px}.cf-card__copy>.ph-mono{letter-spacing:0;color:#a0a0a0;font-size:14px;display:block}.cf-card__copy>.ph-mono>span{color:#999}.cf-card h3{letter-spacing:-.025em;-webkit-line-clamp:2;-webkit-box-orient:vertical;margin-top:8px;font-size:17px;font-weight:600;line-height:1.35;display:-webkit-box;overflow:hidden}.cf-caption{justify-content:center;align-items:center;gap:22px;min-height:32px;font-size:14px;display:flex}.cf-caption>span{color:#777;white-space:nowrap;text-overflow:ellipsis;max-width:40%;overflow:hidden}.cf-caption a{color:var(--ph-fg);border-bottom:1px solid #5a5a5a;padding:5px 0}.cf-caption a span{margin-left:16px}.ph-empty-row{color:#999;padding:42px 0;font-size:14px;line-height:1.7}.ph-empty-row>span{font-family:var(--ph-mono);color:#a4a4a4;margin-right:14px}.ph-empty-row button{padding:18px 0;text-decoration:underline;display:block}.ph-no-lessons{padding:80px 0}.ph-no-lessons h1{margin:20px 0;font-size:38px}.ph-footer{color:#6e6e6e;justify-content:center;gap:20px;max-width:1472px;margin:0 auto;padding:32px 0 40px;display:flex}.ph-footer a{color:#aaa;font-size:14px}.ph-footer .ph-mono{font-size:14px}@keyframes ph-reveal{0%{opacity:0;transform:translateY(7px)}to{opacity:1;transform:none}}@media (min-width:1700px){.ph-hero{min-height:600px}.ph-hero h1{font-size:60px}.ph-main,.ph-header{max-width:1728px}.ph-footer{max-width:1600px}.cf-carousel{--cf-card:350px}}@media (max-width:1100px){.ph-header{gap:42px;padding:0 32px}.ph-main{padding:28px 32px 0}.ph-hero{min-height:510px;padding:38px 32px 85px}.ph-hero h1{font-size:39px}.ph-hero__bottom{left:32px}.ph-hero__actions{gap:20px}.ph-watch{padding:14px 18px}.ph-hero__visual{opacity:.8;width:48%}.ph-hero__description{font-size:14px}.ph-footer{margin:0 32px}.ph-footer>span:last-child{display:none}}@media (max-width:760px){.ph-header{gap:24px;height:76px;padding:0 20px}.ph-logo{width:120px}.ph-logo img{height:37px}.ph-header nav{gap:20px}.ph-header nav a{font-size:14px}.ph-header nav a[aria-current]:after{bottom:-30px}.ph-header__right{gap:0}.ph-plus{display:none}.ph-main{padding:24px 20px 0}.ph-hero{min-height:640px;padding:250px 24px 90px;display:block}.ph-hero__visual{opacity:.85;width:100%;height:300px;top:0;right:0;-webkit-mask-image:linear-gradient(#000 65%,#0000);mask-image:linear-gradient(#000 65%,#0000)}.ph-hero__visual .lesson-art__sphere{width:70%;height:100%;top:-10px;left:15%}.lesson-art--hero .lesson-art__brackets{gap:14%;font-size:200px;inset:0 0 10%}.lesson-art--hero .lesson-art__matrix{gap:5px;inset:5% 33% 20%}.ph-hero__copy{padding:0}.ph-hero h1{letter-spacing:-.055em;max-width:480px;font-size:34px}.ph-hero__meta{gap:7px;margin-top:16px;font-size:14px}.ph-hero__description{-webkit-line-clamp:2;max-width:500px;font-size:14px;margin-top:14px!important}.ph-hero__actions{flex-wrap:wrap;gap:18px;margin-top:22px}.ph-watch{padding:14px 18px;font-size:14px}.ph-browse{font-family:var(--ph-sans);gap:10px;font-size:14px}.ph-hero__bottom{gap:18px;bottom:22px;left:24px;right:24px}.ph-hero__controls{gap:6px}.ph-hero__controls button{width:28px;height:28px;font-size:14px}.ph-hero__count{font-size:14px}.ph-hero__dots{gap:5px}.ph-hero__dots button{width:23px}.ph-library{margin-top:42px}.ph-library__heading{flex-direction:column;align-items:stretch;gap:20px;padding-bottom:26px}.ph-library__heading h2{font-size:23px;line-height:1.35}.ph-library__heading .ph-mono{font-size:14px}.ph-search{width:100%;padding:13px}.ph-collection{padding-top:28px;padding-bottom:23px}.ph-collection__heading{padding-right:78px}.ph-collection__heading h2{font-size:21px}.ph-collection__heading p:last-child,.ph-collection__heading .ph-mono{font-size:14px}.ph-collection__total{display:none}.cf-controls{gap:6px;top:-80px}.cf-controls button{width:31px;height:31px}.cf-carousel{--cf-card:clamp(230px,64vw,320px);margin-left:-20px;margin-right:-20px}.cf-controls{right:20px}.cf-frame{padding-top:22px}.cf-card__copy{padding:12px 14px}.cf-card h3{margin-top:7px;font-size:16px}.cf-caption{gap:14px;padding:0 20px;font-size:14px}.cf-caption>span{max-width:50%}.ph-footer{margin:0 20px;padding-top:24px}.ph-footer .ph-mono{font-size:14px}.lesson-art__brackets{font-size:100px}.ph-account summary{width:31px;height:31px;font-size:14px}}@media (max-width:380px){.ph-header{gap:16px;padding:0 16px}.ph-header nav{gap:12px}.ph-logo{width:105px}.ph-main{padding:24px 16px 0}.ph-hero{padding-left:18px;padding-right:18px}.ph-hero h1{font-size:30px}.ph-hero__actions{gap:12px}.ph-watch{padding:13px}.ph-hero__bottom{gap:12px;left:18px;right:18px}}@media (prefers-reduced-motion:reduce){.ph-page *{scroll-behavior:auto!important;transition:none!important;animation:none!important}}.ph-logo__crop{aspect-ratio:334/76;filter:invert();mix-blend-mode:screen;display:block;position:relative}.ph-logo__crop>span{display:block;position:absolute;overflow:hidden}.ph-logo .ph-logo__crop img{object-fit:initial;max-width:none;height:auto;position:absolute}.ph-logo__owl{width:33.84%;height:100%;top:0;left:0}.ph-logo .ph-logo__owl img{width:773.45%;top:-18.42%;left:-104.42%}.ph-logo__name{width:62.57%;height:34.21%;top:23.68%;left:37.13%}.ph-logo .ph-logo__name img{width:418.18%;top:-123.08%;left:-115.79%}.ph-hero--slider{min-height:0;padding:0;display:block}.ph-hero__track{will-change:transform;align-items:stretch;display:flex}.ph-hero__slide{flex:0 0 100%;grid-template-columns:1fr 1fr;align-items:center;min-width:0;min-height:550px;padding:48px 48px 88px;display:grid;position:relative;overflow:hidden}.ph-hero--slider .ph-hero__copy{animation:none}@media (min-width:1700px){.ph-hero__slide{min-height:600px}}@media (max-width:1100px){.ph-hero__slide{min-height:510px;padding:38px 32px 85px}}@media (max-width:760px){.ph-hero__slide{align-items:center;min-height:640px;padding:250px 24px 90px;display:flex}.ph-hero__slide>.ph-hero__copy{width:100%}}@media (max-width:380px){.ph-hero__slide{padding-left:18px;padding-right:18px}}@media (prefers-reduced-motion:reduce){.ph-hero__track{transition:none!important}}.ph-page button,.ph-watch,.ph-browse,.cf-caption a,.ph-header nav a[aria-current],.ph-plus{font-weight:500}.ph-search input{font-weight:400}.ph-duration{font-family:var(--ph-mono);font-variant-numeric:tabular-nums}.lesson-art--editorial{background:var(--ph-bg)}.lesson-art--editorial.lesson-art--hero{background:0 0}.lesson-art__cover{object-fit:contain;-webkit-user-select:none;user-select:none;pointer-events:none;width:92%;height:92%;position:absolute;inset:4%}.ph-hero__visual .lesson-art__cover{width:92%;height:83%;inset:5% 4% 12%}.pl-cover .lesson-art__cover{width:68%;height:85%;top:0;left:32%}@media (max-width:760px){.ph-hero__visual .lesson-art__cover{width:90%;height:90%;inset:0 5% 10%}}@media (max-width:700px){.pl-cover .lesson-art__cover{width:88%;height:65%;top:0;left:12%}}.ph-page .pl-project-link{font:500 14px/1.5 var(--ph-sans);color:#cde7d1;white-space:nowrap;border:1px solid #375b3e;border-radius:6px;justify-content:center;align-items:center;padding:12px 16px;display:inline-flex}.ph-page .pl-project-link:hover{background:#102015;border-color:#3fb950}.pl-cover__actions{flex-wrap:wrap}@media (max-width:1150px) and (min-width:901px){.ph-header:has(.pj-slot){gap:25px}.ph-header:has(.pj-slot) nav{gap:20px}}@media (max-width:550px){.ph-header:has(.pj-slot){column-gap:16px}.ph-header:has(.pj-slot) nav{order:3;justify-content:center;width:100%;height:42px}.ph-header:has(.pj-slot) nav a[aria-current]:after{bottom:-12px}.ph-header:has(.pj-slot) .ph-header__right{margin-left:auto}.ph-header:has(.pj-slot) .ph-logo{margin-top:18px;margin-bottom:12px}.pj-slot{margin-top:10px}.ph-page .pl-project-link{padding:10px 12px;font-size:13px}}.ph-page .pl-project-link:disabled,.ph-page .cc-project-link:disabled{opacity:.5;cursor:not-allowed;pointer-events:none}.ph-account-photo{border-radius:50%;place-items:center;width:100%;height:100%;display:grid;overflow:hidden}.ph-account-photo img{object-fit:cover;width:100%;height:100%;display:block}.ph-page .ph-trial-notice{margin:0 0 24px;line-height:1.6}