:root{--bg-canvas:#022c22;--bg-surface:#123c32;--bg-surface-hover:#194b3e;--text-primary:#f0fdf4;--text-muted:#bed3c7;--accent-primary:#ff6f59;--accent-secondary:#ffb29c;--border-subtle:rgba(240,253,244,.12);--border-highlight:rgba(255,111,89,.55);--font-sans:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;--font-serif:Georgia,serif;--font-mono:ui-monospace,Consolas,monospace;--ease-kinetic:cubic-bezier(.16,1,.3,1);--shadow-elevation:0 20px 40px -15px rgba(0,0,0,.5);--shadow-inner:inset 0 1px 0 rgba(255,255,255,.1);--glow-accent:0 0 30px -5px rgba(255,111,89,.24);--glass-backdrop:blur(20px) saturate(190%)}
*{box-sizing:border-box;overflow-wrap:anywhere;hyphens:auto}html{scroll-behavior:smooth;scroll-padding-top:24px}body{margin:0;background:var(--bg-canvas);color:var(--text-primary);font:17px/1.7 var(--font-sans)}a{color:var(--accent-secondary);text-underline-offset:5px}a:hover{color:var(--text-primary)}button,input,select,textarea{font:inherit}button,a,input,textarea,select{touch-action:manipulation}button{cursor:pointer}button:disabled{opacity:.6;cursor:not-allowed}:focus-visible{outline:3px solid var(--accent-secondary);outline-offset:5px}::selection{background:var(--accent-primary);color:#022c22}.wrap{max-width:1240px;margin:0 auto;padding:0 28px}.site-header{position:relative;z-index:10;padding:18px 18px 0}.header-capsule{position:relative;max-width:1204px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;gap:18px;padding:17px 20px;border-radius:20px;background:var(--bg-surface);box-shadow:var(--shadow-elevation),var(--shadow-inner)}.brand{display:inline-flex;align-items:center;gap:9px;color:var(--text-primary);font-size:16px;font-weight:800;text-decoration:none;white-space:nowrap;hyphens:none}.brand-mark{color:var(--accent-primary);font-size:28px;line-height:1}.nav{display:flex;align-items:center;gap:16px}.nav a{position:relative;font-size:13px;text-decoration:none;color:var(--text-primary);white-space:nowrap}.nav a:after{content:"";position:absolute;bottom:-5px;left:0;width:100%;height:2px;background:var(--accent-primary);transform:scaleX(0);transform-origin:left;transition:transform .3s var(--ease-kinetic)}.nav a:hover:after,.nav a[aria-current=page]:after{transform:scaleX(1)}.menu-toggle{display:none;background:transparent;color:var(--text-primary);border:1px solid var(--border-subtle);border-radius:12px;font-size:28px;width:44px;height:44px;line-height:1}.skip-link{position:absolute;top:-100px;left:20px;z-index:30;background:var(--accent-primary);color:#022c22;padding:10px}.skip-link:focus{top:10px}.hero{padding:88px 0 64px;background:var(--bg-canvas)}.eyebrow,.tag,.stat-label,h3,.small-label{font-family:var(--font-mono)}.eyebrow{font-size:12px;letter-spacing:.13em;text-transform:uppercase;color:var(--accent-secondary);margin:0 0 20px}h1,h2,h3{line-height:1.1;letter-spacing:-.045em;overflow-wrap:normal;hyphens:none}h1{font-size:clamp(2.6rem,6.6vw,6.1rem);max-width:1000px;margin:0 0 28px;font-weight:800}h2{font-size:clamp(1.9rem,3.4vw,3rem);margin:0 0 22px}h3{font-size:1.1rem;letter-spacing:-.02em;margin:0 0 16px}.lead{font-size:clamp(1.1rem,1.9vw,1.35rem);color:var(--text-muted);max-width:700px;margin:0 0 28px}.section{padding:56px 0}.section-intro{max-width:720px;margin-bottom:28px;color:var(--text-muted)}.button{display:inline-flex;align-items:center;justify-content:center;gap:8px;background:var(--accent-primary);color:#102b21;border:0;border-radius:12px;padding:12px 20px;font-weight:800;text-decoration:none;box-shadow:4px 4px 0 #071c14;transition:transform .25s var(--ease-kinetic),box-shadow .25s var(--ease-kinetic),background .25s}.button:hover{color:#102b21;background:#ff8b77;transform:translate(3px,3px);box-shadow:1px 1px 0 #071c14}.button.secondary{background:transparent;color:var(--text-primary);box-shadow:inset 0 0 0 1px var(--border-subtle)}.button.secondary:hover{background:var(--bg-surface-hover);transform:translateY(-2px)}.actions{display:flex;flex-wrap:wrap;gap:16px;align-items:center;margin:24px 0}.stat-strip{display:flex;flex-wrap:wrap;gap:0;margin:36px 0 0;background:var(--bg-surface);border-radius:20px;padding:20px 10px}.stat{flex:1 1 150px;padding:0 20px}.stat strong{display:block;font:700 1.4rem var(--font-mono);color:var(--accent-secondary)}.stat-label{font-size:12px;color:var(--text-muted)}.atmosphere{position:relative;isolation:isolate}.atmosphere:before{content:"";position:absolute;z-index:-1;inset:0;pointer-events:none;background:radial-gradient(ellipse at 8% 38%,rgba(255,111,89,.13),transparent 58%),radial-gradient(ellipse at 92% 78%,rgba(255,111,89,.09),transparent 54%);animation:meshDrift 15s ease infinite alternate}@keyframes meshDrift{to{opacity:.6;transform:translateY(14px)}}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr)));gap:22px}.topic-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:22px;align-items:start}.panel,.card{background:var(--bg-surface);border-radius:20px;padding:28px;box-shadow:var(--shadow-elevation);min-width:0}.card{display:block;text-decoration:none;color:var(--text-primary);transition:transform .4s var(--ease-kinetic),box-shadow .4s,border-color .4s}.card:hover{transform:translateY(-6px) scale(1.01);box-shadow:var(--shadow-elevation),var(--glow-accent);border-color:var(--border-highlight);color:var(--text-primary)}.card p{color:var(--text-muted);margin-bottom:0}.card .tag{display:block;margin-bottom:20px;color:var(--accent-secondary);font-size:12px}.tabs{display:flex;gap:10px;flex-wrap:wrap;margin:0 0 24px}.tabs a{background:var(--bg-surface);border-radius:999px;padding:7px 16px;text-decoration:none;font:13px var(--font-mono)}.challenge-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:22px}.drawer{position:relative;padding-top:25px}.drawer strong{color:var(--accent-secondary);font:700 2.5rem var(--font-mono)}.drawer p{font-size:1.12rem}.drawer:after{content:"";display:block;width:44px;height:7px;margin-top:25px;background:var(--accent-primary);border-radius:4px}.challenge-form{margin-top:26px}.choice-row{display:flex;flex-wrap:wrap;gap:16px}.choice{display:flex;align-items:center;gap:10px;background:var(--bg-surface);padding:12px 20px;border-radius:12px;cursor:pointer}.choice input{accent-color:var(--accent-primary);width:20px;height:20px}.feedback{min-height:1.8em;color:var(--accent-secondary)}details{margin:14px 0;background:var(--bg-surface);border-radius:20px;padding:20px 24px;box-shadow:var(--shadow-inner)}summary{cursor:pointer;font-weight:700;line-height:1.45}details[open] summary{margin-bottom:18px}details p:last-child{margin-bottom:0}.solution{background:#1c4638}.callout,blockquote{margin:30px 0;padding:22px 26px;border-left:4px solid var(--accent-primary);background:rgba(18,60,50,.8);backdrop-filter:var(--glass-backdrop);border-radius:0 20px 20px 0}.callout p{margin:0}blockquote{font:italic 1.4rem/1.55 var(--font-serif)}.article{max-width:70ch;margin:0 auto;padding:12px 0 64px}.article h2{font-size:2rem;margin-top:48px}.article h3{margin-top:30px}.article p,.article li{color:#d8e8dd}.article li{margin-bottom:10px}.article .lead{color:var(--text-muted)}.article-header{padding-bottom:34px}.article-header h1{font-size:clamp(2.4rem,5vw,4.6rem)}.article-header .lead{max-width:750px}.contents{display:flex;flex-wrap:wrap;gap:12px;font:13px var(--font-mono);margin:25px 0}.media{margin:28px 0}.photo{aspect-ratio:16/9;border-radius:20px;overflow:hidden;background:var(--bg-surface)}.photo img{width:100%;height:100%;display:block;object-fit:cover;filter:brightness(.76) contrast(1.15)}.photo.card-photo{aspect-ratio:4/3}.photo.square-photo{aspect-ratio:1/1}figcaption{font-size:13px;color:var(--text-muted);margin-top:10px}.feature-banner{display:grid;grid-template-columns:1fr 1.4fr;align-items:center;gap:28px;background:var(--bg-surface);border-radius:20px;padding:24px;margin-top:32px}.feature-banner .media{margin:0}.feature-banner h3{font-size:1.4rem}.competition{counter-reset:levels;display:grid;gap:18px}.level{position:relative;padding-left:72px}.level:before{counter-increment:levels;content:"0" counter(levels);position:absolute;left:24px;top:28px;color:var(--accent-primary);font:700 20px var(--font-mono)}.level input{max-width:100%;width:210px}.field{display:grid;gap:7px;margin:20px 0}input[type=text],input[type=email],input[type=number],textarea,select{width:100%;background:#082f25;color:var(--text-primary);border:1px solid #6b8d7b;border-radius:12px;padding:12px 14px}textarea{min-height:150px;resize:vertical}.help{font-size:13px;color:var(--text-muted)}fieldset{border:1px solid var(--border-subtle);border-radius:20px;margin:22px 0;padding:20px}legend{padding:0 8px;font-family:var(--font-mono)}.contact-layout{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(260px,1fr);gap:26px;align-items:start}.contact-output{min-height:220px;font:14px/1.6 var(--font-mono)}.site-footer{margin-top:44px;padding:36px 0 26px;border-top:1px solid var(--border-subtle);color:var(--text-muted);font-size:14px}.footer-row{display:flex;flex-wrap:wrap;justify-content:space-between;gap:22px}.footer-links{display:flex;flex-wrap:wrap;gap:20px}.site-footer p{margin:16px 0 0}.footer-domain{font-weight:700}.small{font-size:13px;color:var(--text-muted)}.reveal{opacity:1;transform:none}.js .reveal{opacity:0;transform:translateY(20px);transition:opacity .8s var(--ease-kinetic),transform .8s var(--ease-kinetic)}.js .reveal.is-visible{opacity:1;transform:translateY(0)}[hidden]{display:none!important}
@media(min-width:1201px){.topic-grid .card:nth-child(even){margin-top:35px}.hero h1{max-width:1050px}}
@media(min-width:769px) and (max-width:1200px){.nav{gap:9px}.nav a{font-size:11px}.header-capsule{gap:10px;padding:16px}.brand{font-size:14px}.hero{padding-top:70px}}
@media(min-width:481px) and (max-width:768px){.hero{padding-top:60px}.wrap{padding:0 24px}.contact-layout{grid-template-columns:1fr}}
@media(max-width:768px){.menu-toggle{display:block}.nav{display:none;position:absolute;top:calc(100% + 8px);left:0;right:0;padding:20px;background:#123c32;border-radius:20px;box-shadow:var(--shadow-elevation);flex-direction:column;align-items:stretch;gap:0}.nav.is-open{display:flex;animation:menuIn .25s var(--ease-kinetic)}.nav a{font-size:15px;padding:12px}.nav a:after{left:12px;bottom:6px;width:35px}.feature-banner{grid-template-columns:1fr}.contact-layout{grid-template-columns:1fr}.site-header{padding:12px 12px 0}@keyframes menuIn{from{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:none}}}
@media(max-width:480px){.wrap{padding:0 18px}.header-capsule{padding:12px;gap:8px}.brand{font-size:13px;gap:6px}.brand-mark{font-size:22px}.hero{padding:48px 0 36px}.section{padding:36px 0}.panel,.card{padding:22px}.topic-grid,.grid,.challenge-grid{grid-template-columns:minmax(0,1fr)}.stat{flex-basis:45%;padding:10px}.stat-strip{padding:10px}.level{padding-left:62px}.level:before{left:20px;top:24px}.feature-banner{padding:18px}.article-header h1{font-size:2.5rem}.actions{gap:12px}h1{font-size:2.8rem}.choice{padding:10px 14px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation:none!important;transition:none!important}.js .reveal{opacity:1;transform:none}}