@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&family=Space+Grotesk:wght@400;500;600;700&display=swap');
:root{color-scheme:dark;--bg:#070d14;--surface:#101a25;--surface2:#142230;--border:#263443;--muted:#91a1b0;--text:#eaf3f7;--aqua:#7ce7dc;--bright:#b6fff3;--blue:#76a8ff;--max:1160px;font-family:'DM Sans',system-ui,-apple-system,Segoe UI,sans-serif;font-synthesis:none}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);line-height:1.6;min-width:320px}a{color:inherit;text-decoration:none}a:hover{color:var(--aqua)}button,input{font:inherit}button{cursor:pointer}button:focus-visible,input:focus-visible,a:focus-visible{outline:2px solid var(--aqua);outline-offset:4px}::selection{background:#245850;color:white}
.container{width:min(var(--max),calc(100% - 48px));margin:auto}.eyebrow{color:var(--aqua);letter-spacing:.14em;text-transform:uppercase;font-size:.75rem;font-weight:700}.muted{color:var(--muted)}h1,h2,h3{font-family:'Space Grotesk',system-ui,sans-serif;line-height:1.18;letter-spacing:-.038em;margin:0}h1{font-size:clamp(2.65rem,5.6vw,5.2rem)}h2{font-size:clamp(1.85rem,3vw,2.7rem)}h3{font-size:1.25rem}p{margin:0 0 1rem}.big{font-size:1.125rem}.header{position:sticky;top:0;z-index:100;background:rgba(7,13,20,.87);backdrop-filter:blur(18px);border-bottom:1px solid #23303c}.header-inner{min-height:79px;display:flex;align-items:center;gap:28px}.brand{display:flex;gap:11px;align-items:center;flex-shrink:0}.brand-mark{height:38px;width:38px;display:grid;place-items:center;border:1px solid rgba(124,231,220,.4);background:#112831;border-radius:12px}.brand-logo{width:24px;height:24px}.brand-title{font-size:1.3rem;font-weight:700;font-family:'Space Grotesk',sans-serif;letter-spacing:.065em;line-height:1}.brand-sub{font-size:.64rem;color:#8f9dab;letter-spacing:.02em;margin-top:3px}.nav{display:flex;align-items:center;gap:29px;margin-left:auto;font-size:.88rem;color:#b7c5d2}.nav>a,.nav summary{color:inherit}.nav a[aria-current=page]{color:var(--aqua)}.nav details{position:relative}.nav summary{list-style:none;cursor:pointer}.nav summary::-webkit-details-marker{display:none}.nav summary:after{content:'⌄';margin-left:7px;color:var(--aqua)}.drop{position:absolute;top:31px;left:-18px;background:#121e2a;border:1px solid var(--border);border-radius:12px;padding:12px;display:grid;min-width:188px;box-shadow:0 15px 30px #0008}.drop a{padding:7px 10px;border-radius:6px}.drop a:hover{background:#1d2d39}.header-actions{display:flex;align-items:center;gap:13px;margin-left:7px}.language{border:1px solid var(--border);border-radius:8px;padding:7px 11px;font-size:.77rem;white-space:nowrap;color:var(--aqua);font-weight:700}.search-shortcut{color:#b5c5d1;font-size:.8rem}.hamburger{display:none;background:transparent;border:1px solid var(--border);border-radius:8px;color:white;padding:8px 11px}.mobile-nav{display:none}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:11px;padding:13px 22px;border:1px solid transparent;border-radius:9px;font-size:.9rem;font-weight:700;transition:background .2s,transform .2s}.btn:hover{transform:translateY(-1px)}.btn-primary{background:var(--aqua);color:#07232a}.btn-primary:hover{background:var(--bright);color:#07232a}.btn-outline{border-color:#3b5061;background:rgba(14,25,36,.5);color:#ecf7f7}.btn-outline:hover{border-color:var(--aqua);color:var(--aqua)}.link{color:var(--aqua);font-weight:700;font-size:.9rem}.link:hover{text-decoration:underline}.btn-small{padding:9px 15px;font-size:.83rem}
.hero{padding:90px 0 92px;position:relative;overflow:hidden;border-bottom:1px solid #1c2a34;background:radial-gradient(ellipse at 77% 45%,#10323c 0%,rgba(11,32,42,.15) 37%,transparent 66%)}.hero:before{content:'';pointer-events:none;position:absolute;inset:0;background-image:linear-gradient(#b7fcf109 1px,transparent 1px),linear-gradient(90deg,#b7fcf109 1px,transparent 1px);background-size:45px 45px;mask-image:linear-gradient(90deg,transparent 16%,black 95%)}.hero-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,.92fr);gap:62px;align-items:center;position:relative}.hero h1{max-width:700px;margin:22px 0 23px}.hero h1 em{font-style:normal;color:var(--aqua)}.hero .lead{color:#aebfcb;font-size:1.06rem;max-width:530px;line-height:1.8}.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:31px}.hero-bottom{display:flex;gap:25px;flex-wrap:wrap;margin-top:49px;color:#8fa4b3;font-size:.75rem}.hero-bottom strong{color:#e4f3f3;font-size:.95rem;display:block}.hero-art{width:100%;filter:drop-shadow(0 12px 60px #00d8c51a);max-width:525px}.hero-card{position:relative;display:grid;place-items:center}.hero-chip{position:absolute;left:0;bottom:3%;padding:10px 16px;background:#13202ced;border:1px solid #31505a;border-radius:8px;box-shadow:0 14px 30px #0004;font-size:.7rem;color:#a7d5d4}.hero-chip strong{display:block;font-size:.85rem;color:var(--bright)}
.section{padding:79px 0}.section + .section{border-top:1px solid #1b2832}.section-head{display:flex;align-items:end;justify-content:space-between;gap:25px;margin-bottom:28px}.section-head h2{margin-top:12px}.section-head p{max-width:640px;margin:13px 0 0;color:var(--muted)}.category-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:17px}.category-card,.card,.callout,.quiz-panel{border:1px solid var(--border);background:linear-gradient(145deg,#13202a,#0e1822);border-radius:13px}.category-card{padding:24px;min-height:210px;display:flex;flex-direction:column;align-items:start;transition:transform .18s,border-color .18s}.category-card:hover,.card:hover{border-color:#4a867f;transform:translateY(-3px);color:var(--text)}.cat-icon{width:49px;height:49px;display:grid;place-items:center;background:#1b363c;color:#9af5e9;border:1px solid #2a5457;border-radius:11px;font-size:1.35rem;margin-bottom:32px}.category-card h3{font-size:1.07rem}.category-card p{color:var(--muted);font-size:.81rem;margin:8px 0 0}.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:17px}.card{display:flex;flex-direction:column;min-height:253px;padding:23px;transition:transform .18s,border-color .18s}.card h3{font-size:1.23rem;margin:14px 0 9px}.card p{color:#9db0be;font-size:.9rem;line-height:1.7;flex:1}.card-bottom{margin-top:28px;display:flex;align-items:center;justify-content:space-between;color:#8ca1af;font-size:.78rem}.card-bottom .link{font-size:.8rem}.tag{font-size:.71rem;color:var(--aqua);background:#15343a;border:1px solid #275059;border-radius:5px;padding:5px 9px;display:inline-flex;align-items:center;width:max-content}.card:has(.resource-icon){min-height:210px}.resource-icon{font-size:2rem;line-height:1}.resource-meta{display:flex;gap:10px;align-items:center}
.cta{margin-top:42px;padding:28px 32px;background:linear-gradient(90deg,#143137,#122531);border:1px solid #2c6262;border-radius:13px;display:flex;align-items:center;justify-content:space-between;gap:25px}.cta p{margin:7px 0 0;color:#b3c6cc}.page-hero{padding:68px 0 43px;border-bottom:1px solid #1b2a35;background:radial-gradient(ellipse at 76% 15%,#102a36,transparent 55%)}.page-hero h1{font-size:clamp(2.4rem,4.5vw,4rem);margin:13px 0 17px}.page-hero p{max-width:710px;color:#9aafbd;font-size:1rem}.crumbs{font-size:.78rem;color:#89a0ae;display:flex;gap:9px;align-items:center}.crumbs a:hover{color:var(--aqua)}.toolbox{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;margin:0 0 26px}.searchbox{display:flex;align-items:center;gap:11px;background:#101c27;border:1px solid #364959;border-radius:10px;padding:11px 15px;min-width:min(100%,350px)}.searchbox span{color:var(--aqua)}.searchbox input{background:none;border:none;outline:none;color:white;width:100%;min-width:120px;font-size:.92rem}.searchbox input::placeholder{color:#8195a3}.filters{display:flex;gap:9px;flex-wrap:wrap;margin:16px 0 26px}.filter{background:transparent;border:1px solid #2e404f;border-radius:99px;padding:7px 15px;color:#a9beca;font-size:.81rem}.filter.active,.filter:hover{background:#16383b;color:#a7fff0;border-color:#4f9b91}.count{color:var(--muted);font-size:.79rem}.empty{border:1px dashed var(--border);border-radius:14px;padding:45px;text-align:center;color:var(--muted)}[hidden]{display:none!important}
.article-shell{max-width:815px;padding:57px 0 92px}.article-head h1{font-size:clamp(2.2rem,4.4vw,3.9rem);margin:20px 0}.article-head .desc{font-size:1.12rem;color:#adbfca;line-height:1.8}.article-meta{display:flex;gap:16px;flex-wrap:wrap;margin:20px 0 32px;font-size:.81rem;color:var(--muted)}.article-body{border-top:1px solid #2a3844;padding-top:32px;font-size:1.02rem;color:#c6d6de;line-height:1.85}.article-body h2{color:#f1fbfc;margin:40px 0 15px;font-size:1.75rem}.article-body h3{color:#f1fbfc;margin:30px 0 10px}.article-body p{margin:0 0 17px}.article-body ul,.article-body ol{padding-left:23px}.article-body li{margin:8px 0}.article-body code{background:#19323c;border-radius:5px;padding:2px 5px;color:#adffe9}.article-body pre{padding:20px;overflow:auto;border:1px solid #2a5056;background:#0d1b26;border-radius:9px}.article-body pre code{padding:0;background:none}.article-body blockquote{margin:25px 0;padding:10px 0 10px 20px;border-left:3px solid var(--aqua);color:#e0e9eb;background:#10252a}.article-body a{color:var(--aqua);text-decoration:underline}.article-body img{max-width:100%;border-radius:9px}
.learn-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:17px}.path-card{border-radius:13px;background:#12202c;border:1px solid #2a3d48;padding:27px}.path-num{color:#79e3d6;font-size:.8rem;font-weight:700}.path-card h3{margin:18px 0 12px}.path-card p{color:#99aebc;font-size:.87rem;min-height:75px}.path-card a{color:var(--aqua);font-weight:700;font-size:.85rem}.wide-note{padding:20px 24px;margin-top:25px;border:1px solid #2a414b;background:#0e1d27;border-radius:10px;color:#aec1cc}.about-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:40px}.about-grid p{color:#b6c8d1;line-height:1.9}.principles{display:grid;gap:13px}.principle{background:#111f29;border:1px solid #2c414d;border-radius:12px;padding:21px}.principle strong{display:block;margin-bottom:5px}.principle span{font-size:.9rem;color:#a2b9c4}
.quiz-box{max-width:830px}.question{padding:28px;margin-bottom:18px;border:1px solid #293d4a;background:#111d28;border-radius:13px}.question.correct{border-color:#328375}.question.incorrect{border-color:#9c6b45}.question h3{font-size:1.14rem;line-height:1.5;margin-bottom:19px}.option{display:flex;align-items:flex-start;gap:11px;padding:11px 14px;margin:8px 0;border-radius:9px;border:1px solid #314452;cursor:pointer;color:#cadae2}.option:hover{background:#182b37;border-color:#527783}.option:has(input:checked){border-color:#70c9bb;background:#183b40}.option input{accent-color:#72d9ce;margin-top:4px}.explanation{margin:18px 0 0;padding:12px 16px;background:#1b343b;border-radius:8px;color:#cfede9;font-size:.88rem}.quiz-result{margin:22px 0;padding:20px;background:#16363b;border:1px solid #538f86;border-radius:10px;color:#b9fff5;font-size:1.25rem;font-weight:700}.quiz-controls{display:flex;gap:12px}
.footer{background:#0a131c;border-top:1px solid #21303d;padding:47px 0 25px}.footer-main{display:flex;align-items:start;justify-content:space-between;gap:30px}.footer p{font-size:.85rem;color:#92a6b5;margin:14px 0;max-width:380px}.footer-nav{display:flex;gap:45px;flex-wrap:wrap;font-size:.83rem;color:#abbcc7}.footer-nav div{display:grid;gap:10px}.footer-nav strong{color:#e7f5f8}.footer-bottom{border-top:1px solid #27343e;margin-top:38px;padding-top:20px;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;color:#79909e;font-size:.75rem}
@media(max-width:1000px){.nav{gap:15px}.header-inner{gap:15px}.hero-grid{gap:23px}.category-grid{grid-template-columns:repeat(2,1fr)}.card-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:760px){.container{width:min(var(--max),calc(100% - 34px))}.header-inner{min-height:68px}.brand-sub{display:none}.nav{display:none}.header-actions{margin-left:auto}.hamburger{display:block}.search-shortcut{display:none}.mobile-nav:not([hidden]){display:grid;gap:4px;padding:8px 17px 20px;background:#0b1721;border-top:1px solid #273747}.mobile-nav a{display:block;padding:9px 4px;color:#d1e1e8}.hero{padding:63px 0 65px}.hero-grid{grid-template-columns:1fr}.hero-art{max-width:395px}.hero-card{margin-top:15px}.hero-bottom{margin-top:29px}.section{padding:55px 0}.section-head{align-items:start;flex-direction:column}.card-grid{grid-template-columns:1fr}.cta{align-items:start;flex-direction:column}.learn-grid{grid-template-columns:1fr}.about-grid{grid-template-columns:1fr}.footer-main{flex-direction:column}.page-hero{padding:44px 0 27px}.article-shell{padding:38px 0 70px}.header .brand-title{font-size:1.2rem}}
@media(max-width:490px){h1{font-size:2.55rem}.hero-actions{flex-direction:column;align-items:stretch}.category-grid{grid-template-columns:1fr}.category-card{min-height:155px}.cat-icon{margin-bottom:17px}.hero-chip{bottom:-3%}.footer-nav{gap:28px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;transition:none!important}}