:root{--ink:#0d1b2a;--ink-soft:#33475b;--paper:#f6f4ef;--line:#c9cbc4;--line-strong:#9aa0a6;--accent:#1f6feb;--accent-deep:#0b3d91;--amber:#c8892b;--card:#fbfaf7;--shadow:0 1px 2px rgba(13,27,42,.06),0 8px 24px rgba(13,27,42,.06)}*{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{font-family:Inter,system-ui,sans-serif;color:var(--ink);background:var(--paper);line-height:1.6;-webkit-font-smoothing:antialiased}::selection{background:var(--accent);color:#fff}a{color:inherit;text-decoration:none}.wrap{max-width:1080px;margin:0 auto;padding:0 28px}.grid-bg{position:fixed;top:0;right:0;bottom:0;left:0;z-index:-1;background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);background-size:34px 34px;opacity:.32;-webkit-mask-image:radial-gradient(ellipse 80% 60% at 50% 0%,#000 20%,transparent 78%);mask-image:radial-gradient(ellipse 80% 60% at 50% 0%,#000 20%,transparent 78%)}nav{position:sticky;top:0;z-index:50;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);background:#f6f4efd1;border-bottom:1px solid var(--line)}nav .wrap{display:flex;align-items:center;justify-content:space-between;height:64px}.brand{font-family:IBM Plex Mono,monospace;font-size:13px;letter-spacing:.04em;font-weight:500;cursor:pointer}.brand b{color:var(--accent)}.navlinks{display:flex;gap:26px;font-size:14px;font-weight:500;align-items:center}.navlinks button,.navlinks a{color:var(--ink-soft);transition:color .2s;background:none;border:none;font:inherit;cursor:pointer}.navlinks button:hover,.navlinks a:hover,.navlinks .active,.navlinks .cta{color:var(--accent)}@media (max-width:680px){.navlinks{gap:16px;font-size:13px}}@media (max-width:520px){.navlinks .hide-sm{display:none}}header{padding:96px 0 72px;position:relative}.eyebrow{font-family:IBM Plex Mono,monospace;font-size:12.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--accent-deep);margin-bottom:22px;display:flex;align-items:center;gap:12px}.eyebrow:before{content:"";width:36px;height:1px;background:var(--accent)}h1{font-family:Fraunces,serif;font-weight:500;font-size:clamp(2.6rem,6vw,4.6rem);line-height:1.02;letter-spacing:-.015em;max-width:14ch}h1 em{font-style:italic;color:var(--accent-deep)}.lede{margin-top:28px;max-width:56ch;font-size:clamp(1.05rem,2vw,1.22rem);color:var(--ink-soft)}.hero-actions{margin-top:38px;display:flex;gap:16px;flex-wrap:wrap;align-items:center}.btn{font-size:14.5px;font-weight:600;padding:13px 22px;border-radius:2px;border:1px solid var(--accent);transition:all .2s;cursor:pointer;background:none;font-family:inherit}.btn-solid{background:var(--accent);color:#fff}.btn-solid:hover{background:var(--accent-deep);border-color:var(--accent-deep)}.btn-ghost{color:var(--accent);background:transparent}.btn-ghost:hover{background:#1f6feb12}.btn:disabled{opacity:.5;cursor:not-allowed}.ticker{margin-top:30px;display:flex;align-items:center;gap:14px;font-family:IBM Plex Mono,monospace;font-size:13.5px;color:var(--ink-soft);min-height:22px}.ticker .prompt{color:var(--accent);font-weight:500}.ticker .line span{transition:opacity .4s ease}.ticker .line span.out{opacity:0}.ticker .caret{display:inline-block;width:8px;height:16px;margin-left:2px;background:var(--accent);vertical-align:-3px;animation:blink 1.1s steps(1) infinite}@keyframes blink{50%{opacity:0}}.hero-meta{margin-top:52px;display:grid;grid-template-columns:repeat(3,auto);gap:44px;font-family:IBM Plex Mono,monospace}.hero-meta div span{display:block}.hero-meta .k{font-size:26px;color:var(--ink);font-weight:500}.hero-meta .l{font-size:12px;color:var(--ink-soft);letter-spacing:.03em;margin-top:4px;font-family:Inter}@media (max-width:560px){.hero-meta{gap:28px}}section{padding:72px 0;border-top:1px solid var(--line)}.sec-head{display:flex;align-items:baseline;gap:16px;margin-bottom:40px}.sec-no{font-family:IBM Plex Mono,monospace;font-size:13px;color:var(--accent);font-weight:500}.sec-title{font-family:Fraunces,serif;font-weight:500;font-size:clamp(1.6rem,3.4vw,2.2rem);letter-spacing:-.01em}.sec-sub{color:var(--ink-soft);max-width:60ch;margin-bottom:8px}.about-grid{display:grid;grid-template-columns:1.3fr 1fr;gap:56px}@media (max-width:760px){.about-grid{grid-template-columns:1fr;gap:36px}}.about-grid p{margin-bottom:18px;color:var(--ink-soft)}.about-grid p strong{color:var(--ink);font-weight:600}.stack{border:1px solid var(--line);background:var(--card);border-radius:3px;overflow:hidden}.stack-row{padding:15px 18px;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;align-items:center;gap:12px;font-size:13.5px}.stack-row:last-child{border-bottom:none}.stack-row .layer{font-family:IBM Plex Mono,monospace;font-size:11px;color:var(--accent);letter-spacing:.05em}.stack-row .name{font-weight:600;color:var(--ink)}.stack-row:hover{background:#1f6feb0a}.cases{display:grid;gap:22px}.case{border:1px solid var(--line);background:var(--card);border-radius:3px;padding:28px 30px;box-shadow:var(--shadow);transition:transform .18s,border-color .18s;position:relative}.case:hover{transform:translateY(-2px);border-color:var(--accent)}.case-tag{font-family:IBM Plex Mono,monospace;font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--accent-deep);margin-bottom:12px}.case h3{font-family:Fraunces,serif;font-weight:500;font-size:1.4rem;letter-spacing:-.01em;margin-bottom:10px}.case p{color:var(--ink-soft);font-size:15px;max-width:70ch}.case .chips{margin-top:16px;display:flex;flex-wrap:wrap;gap:8px}.chip{font-family:IBM Plex Mono,monospace;font-size:11px;padding:4px 9px;border:1px solid var(--line-strong);border-radius:2px;color:var(--ink-soft)}.case .outcome{margin-top:16px;padding-top:14px;border-top:1px dashed var(--line-strong);font-size:13.5px;color:var(--ink)}.case .outcome b{color:var(--amber);font-family:IBM Plex Mono,monospace}.certs{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}@media (max-width:640px){.certs{grid-template-columns:1fr}}.cert{border-left:2px solid var(--accent);padding:6px 0 6px 18px}.cert .t{font-weight:600;font-size:15px}.cert .y{font-family:IBM Plex Mono,monospace;font-size:12px;color:var(--ink-soft)}.writing p{color:var(--ink-soft);max-width:60ch}.contact-card{border:1px solid var(--accent);background:linear-gradient(180deg,rgba(31,111,235,.04),transparent);border-radius:3px;padding:44px;text-align:center}.contact-card h2{font-family:Fraunces,serif;font-weight:500;font-size:clamp(1.8rem,4vw,2.6rem);letter-spacing:-.015em}.contact-card p{color:var(--ink-soft);margin:14px auto 28px;max-width:48ch}.contact-links{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}footer{padding:40px 0 60px;border-top:1px solid var(--line);color:var(--ink-soft);font-size:13px}footer .wrap{display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px}footer .mono{font-family:IBM Plex Mono,monospace}.diagram-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:20px}.diagram-card{border:1px solid var(--line);background:var(--card);border-radius:3px;overflow:hidden;box-shadow:var(--shadow)}.diagram-card img{width:100%;height:190px;object-fit:cover;display:block;background:#eee;cursor:zoom-in}.diagram-card .meta{padding:14px 16px}.diagram-card .meta .t{font-weight:600;font-size:14.5px;margin-bottom:3px}.diagram-card .meta .d{font-size:13px;color:var(--ink-soft)}.empty{border:1px dashed var(--line-strong);border-radius:3px;padding:40px;text-align:center;color:var(--ink-soft)}.lightbox{position:fixed;top:0;right:0;bottom:0;left:0;background:#0d1b2ae0;z-index:100;display:flex;align-items:center;justify-content:center;padding:32px;cursor:zoom-out}.lightbox img{max-width:100%;max-height:100%;box-shadow:0 20px 60px #00000080}.prep-tabs{display:flex;gap:8px;border-bottom:1px solid var(--line);margin-bottom:32px;flex-wrap:wrap}.prep-tabs button{font-family:IBM Plex Mono,monospace;font-size:13px;padding:10px 16px;border:none;background:none;color:var(--ink-soft);cursor:pointer;border-bottom:2px solid transparent;margin-bottom:-1px}.prep-tabs button.active{color:var(--accent);border-bottom-color:var(--accent)}.offer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:20px;margin-top:8px}.offer{border:1px solid var(--line);background:var(--card);border-radius:3px;padding:26px;box-shadow:var(--shadow)}.offer .price{font-family:IBM Plex Mono,monospace;color:var(--accent);font-size:13px;margin-bottom:8px}.offer h3{font-family:Fraunces,serif;font-weight:500;font-size:1.3rem;margin-bottom:10px}.offer ul{list-style:none;margin-top:12px}.offer li{font-size:14px;color:var(--ink-soft);padding:6px 0 6px 20px;position:relative}.offer li:before{content:"→";position:absolute;left:0;color:var(--accent)}.gate{border:1px solid var(--line);background:var(--card);border-radius:3px;padding:36px;max-width:440px;margin:0 auto;text-align:center}.gate input{width:100%;padding:12px 14px;border:1px solid var(--line-strong);border-radius:2px;font-family:IBM Plex Mono,monospace;font-size:14px;margin:14px 0}.study-toolbar{display:flex;gap:10px;flex-wrap:wrap;align-items:center;margin-bottom:24px}.pill{font-family:IBM Plex Mono,monospace;font-size:12px;padding:6px 12px;border:1px solid var(--line-strong);border-radius:20px;cursor:pointer;background:none;color:var(--ink-soft)}.pill.active{background:var(--accent);color:#fff;border-color:var(--accent)}.flashcard{border:1px solid var(--line);background:var(--card);border-radius:4px;padding:40px;min-height:220px;display:flex;flex-direction:column;justify-content:center;box-shadow:var(--shadow);cursor:pointer;text-align:center}.flashcard .q{font-family:Fraunces,serif;font-size:1.35rem;font-weight:500}.flashcard .a{color:var(--ink-soft);font-size:15px;margin-top:16px;text-align:left;line-height:1.7}.flashcard .hint{font-family:IBM Plex Mono,monospace;font-size:11px;color:var(--accent);margin-top:20px;letter-spacing:.04em}.study-nav{display:flex;justify-content:space-between;align-items:center;margin-top:20px}.study-count{font-family:IBM Plex Mono,monospace;font-size:13px;color:var(--ink-soft)}.admin-bar{position:fixed;bottom:20px;right:20px;z-index:60}.admin-toggle{font-family:IBM Plex Mono,monospace;font-size:12px;padding:10px 16px;background:var(--ink);color:var(--paper);border:none;border-radius:2px;cursor:pointer;box-shadow:var(--shadow)}.uploader{border:1px solid var(--line);background:var(--card);border-radius:3px;padding:24px;margin-top:24px}.uploader label{display:block;font-size:13px;font-weight:600;margin:14px 0 6px}.uploader input[type=text],.uploader input[type=file]{width:100%;padding:10px 12px;border:1px solid var(--line-strong);border-radius:2px;font-family:inherit;font-size:14px}.uploader .row{display:flex;gap:12px;align-items:flex-end;flex-wrap:wrap;margin-top:16px}.msg{font-family:IBM Plex Mono,monospace;font-size:13px;margin-top:12px}.msg.ok{color:#1a7f37}.msg.err{color:#b42318}.del-btn{font-family:IBM Plex Mono,monospace;font-size:11px;color:#b42318;background:none;border:1px solid #f2c4bf;border-radius:2px;padding:4px 10px;cursor:pointer;margin-top:8px}.reveal{opacity:0;transform:translateY(14px);transition:opacity .6s ease,transform .6s ease}.reveal.in{opacity:1;transform:none}@media (prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}html{scroll-behavior:auto}.ticker .caret{animation:none}}:focus-visible{outline:2px solid var(--accent);outline-offset:3px}