:root{--teal:#0E7C7B;--teal-dark:#0A5F5E;--teal-bg:#E5F5F5;--ink:#1A1C1C;--gray:#6B7378;--bg:#FAFAF8;--border:#E0E3E0;--amber:#B57300;--amber-bg:#FEF0D4;--green:#128040;--green-bg:#E5F8EA;--red:#CC4040;--red-bg:#FCE8E8}*{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,system-ui,sans-serif;background:var(--bg);color:var(--ink);line-height:1.6;-webkit-font-smoothing:antialiased}a{color:var(--teal);text-decoration:none}a:hover{text-decoration:underline}.wrap{max-width:720px}.wrap,.wrap-wide{margin:0 auto;padding:0 24px}.wrap-wide{max-width:980px}.card{background:#fff;border:1px solid var(--border);border-radius:14px;padding:20px;margin-bottom:14px}.chip{display:inline-block;padding:6px 14px;border-radius:999px;font-size:13px;font-weight:600}.chip-amber{background:var(--amber-bg);color:var(--amber)}.chip-teal{background:var(--teal-bg);color:var(--teal)}.btn{display:inline-block;background:var(--teal);color:#fff!important;font-weight:700;font-size:16px;padding:15px 32px;border-radius:14px;border:none;cursor:pointer;text-decoration:none!important}.btn:hover{background:var(--teal-dark)}.btn-block{display:block;width:100%;text-align:center}.btn-secondary{background:#fff;color:var(--teal)!important;border:1.5px solid var(--teal)}.btn-secondary:hover{background:var(--teal-bg)}.site-nav{display:flex;align-items:center;justify-content:space-between;padding:18px 0}.site-nav .logo{font-size:20px;font-weight:800;color:var(--ink);text-decoration:none}.site-nav .logo span{color:var(--teal)}.site-nav .links{display:flex;gap:20px;font-size:14px;font-weight:600}.site-footer{border-top:1px solid var(--border);margin-top:64px;padding:32px 0 48px;font-size:13px;color:var(--gray)}.site-footer .cols{display:flex;flex-wrap:wrap;gap:32px}.site-footer h4{font-size:12px;text-transform:uppercase;letter-spacing:.05em;margin-bottom:8px;color:var(--ink)}.site-footer ul{list-style:none}.site-footer li{margin-bottom:4px}.hero{padding:56px 0 40px}.hero h1{font-size:40px;line-height:1.15;font-weight:800;letter-spacing:-.02em}.hero h1 em{color:var(--teal);font-style:normal}.hero .sub{font-size:18px;color:var(--gray);margin:18px 0 28px;max-width:560px}.feature-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));grid-gap:14px;gap:14px;margin:32px 0}.feature-grid .card{margin:0}.feature-grid h3{font-size:15px;margin:8px 0 4px}.feature-grid p{font-size:13px;color:var(--gray)}h2.section{font-size:26px;font-weight:800;margin:48px 0 16px;letter-spacing:-.01em}article h1{font-size:34px;line-height:1.2;font-weight:800;margin:32px 0 8px;letter-spacing:-.02em}article .meta{color:var(--gray);font-size:14px;margin-bottom:24px}article h2{font-size:24px;font-weight:700;margin:36px 0 12px}article p{margin-bottom:14px;font-size:16.5px}article ol,article ul{margin:0 0 14px 24px}article li{margin-bottom:6px}.formula{background:var(--teal-bg);border-radius:12px;padding:14px 18px;font-weight:700;font-size:16px;margin:14px 0;color:var(--teal-dark)}.q-block{margin-bottom:16px}.q-block .vignette{font-size:15.5px;margin-bottom:6px}.q-block .prompt{font-weight:600;font-size:15.5px}.q-block details{margin-top:10px}.q-block summary{cursor:pointer;font-weight:600;color:var(--teal);font-size:14px}.q-block .steps{margin-top:10px;padding-left:4px}.q-block .step{display:flex;gap:10px;margin-bottom:8px;align-items:baseline}.q-block .step .n{background:var(--teal-bg);font-size:12px;width:22px;height:22px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;flex-shrink:0}.q-block .answer,.q-block .step .n{color:var(--teal);font-weight:700}.q-block .mistake{background:var(--amber-bg);color:var(--amber);border-radius:10px;padding:10px 14px;font-size:13.5px;margin-top:10px}.cta-band{background:var(--teal);border-radius:20px;color:#fff;padding:36px 32px;margin:48px 0;text-align:center}.cta-band h2{font-size:26px;font-weight:800;margin-bottom:8px}.cta-band p{opacity:.9;margin-bottom:20px}.cta-band .btn{background:#fff;color:var(--teal)!important}@media (max-width:640px){.hero h1{font-size:30px}.site-nav .links{gap:12px;font-size:13px}}