:root{--bg:#f6f9fb;--paper:#fff;--ink:#1d2a39;--muted:#657589;--accent:#126cbc;--green:#149a77;--border:#e2eaf0;--dark:#0a182a}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);background:var(--bg);line-height:1.55}
a{color:inherit}button{font:inherit;cursor:pointer}.wrap{max-width:1210px;margin:auto;padding:0 22px}.nav{position:sticky;top:0;z-index:15;background:rgba(255,255,255,.94);border-bottom:1px solid var(--border);backdrop-filter:blur(16px)}
.navinner{display:flex;justify-content:space-between;align-items:center;min-height:72px;gap:20px}.brand{font-weight:850;font-size:17px;text-decoration:none;letter-spacing:-.04em}.brand span{color:var(--green)}.navlinks{display:flex;align-items:center;flex-wrap:wrap;gap:17px}.navlinks a{font-size:13px;font-weight:660;text-decoration:none;color:#405166}.navlinks a:hover{color:var(--accent)}.navlinks .nav-cta{background:var(--dark);color:#fff;padding:10px 15px;border-radius:9px}
.hero{background:linear-gradient(120deg,#0a192d,#153456 74%,#144e4a);color:#fff;padding:72px 0 64px;overflow:hidden;position:relative}.hero::after{content:"";position:absolute;right:-160px;top:-140px;width:650px;height:650px;background:radial-gradient(circle,rgba(38,180,158,.23),transparent 65%);pointer-events:none}.over{color:#6cd7c0;font-size:11px;letter-spacing:.17em;font-weight:800;text-transform:uppercase}.hero h1{max-width:960px;font-size:clamp(35px,5.6vw,69px);letter-spacing:-.055em;line-height:1.1;margin:14px 0 18px}.hero p{max-width:790px;color:#cbdbeb;font-size:clamp(16px,2.1vw,19px)}.hero .pill{color:#d9f2eb;background:#ffffff13;border:1px solid #ffffff33;display:inline-block;border-radius:999px;padding:7px 13px;font-size:12px;margin-top:14px}
.section{padding:55px 0}.sectionhead{display:flex;justify-content:space-between;gap:22px;align-items:end;flex-wrap:wrap;margin-bottom:24px}.eyebrow{font-size:12px;letter-spacing:.13em;color:var(--accent);font-weight:800;text-transform:uppercase}.section h2{font-size:clamp(28px,4vw,43px);letter-spacing:-.045em;line-height:1.15;margin:0 0 12px}.section .lead{max-width:780px;color:var(--muted);margin:0}.filters{display:flex;gap:8px;flex-wrap:wrap}.filter{border:1px solid #d8e4ea;background:#fff;color:#44576a;border-radius:99px;padding:9px 14px;font-size:13px;font-weight:700}.filter[aria-pressed="true"]{background:var(--dark);color:#fff;border-color:var(--dark)}.grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.card{background:white;border:1px solid var(--border);border-radius:17px;padding:22px;box-shadow:0 7px 25px rgba(11,30,51,.035);display:flex;flex-direction:column;gap:12px}.card:hover{border-color:#abc6d4}.card h3{font-size:20px;line-height:1.28;letter-spacing:-.025em;margin:0}.card p{color:#566779;margin:0;font-size:14px}.meta{display:flex;gap:7px;flex-wrap:wrap}.tag{font-size:11px;border-radius:5px;background:#e9f3f8;color:#23658b;font-weight:800;padding:5px 8px}.tag.green{background:#e7f6ed;color:#197653}.copy{margin-top:auto;display:flex;flex-wrap:wrap;gap:7px}.button{border:1px solid var(--dark);border-radius:9px;background:var(--dark);color:white;padding:10px 14px;text-decoration:none;font-size:13px;font-weight:730;display:inline-flex;align-items:center;justify-content:center;gap:8px}.button.secondary{background:white;border-color:#cfdde5;color:#233e56}.button.disabled{background:#e8eef2;border-color:#dfe6eb;color:#657589;cursor:not-allowed}.caption{font-size:12px!important;color:var(--muted)!important}.note{padding:18px 20px;background:#eaf5f5;border-left:3px solid var(--green);border-radius:9px;color:#244c54}.note p{margin:0}.book-icon{width:54px;height:58px;background:linear-gradient(135deg,#c1e8e2,#e7f0ff);border-radius:10px;display:grid;place-items:center;font-size:24px;font-weight:900;color:#183956}.bookcard{min-height:328px}.bookcard .titleband{display:flex;gap:13px;align-items:center}.price{font-size:23px;letter-spacing:-.035em;font-weight:850;color:var(--dark)}.course-links{display:flex;flex-wrap:wrap;gap:9px;margin-top:auto}.detail{display:grid;grid-template-columns:1.4fr .8fr;gap:35px}.lessons{padding:0;list-style:none}.lessons li{padding:12px 0;border-bottom:1px solid var(--border)}.lessons li b{display:block}.footer{padding:34px 0 45px;background:#0e1b2a;color:#bac6d1;font-size:13px}.footer a{color:#e0eff7;text-decoration:none}.two{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.step{border:1px solid var(--border);border-radius:15px;background:#fff;padding:20px}.step strong{color:var(--accent)}.copy-output{white-space:pre-wrap;background:#ecf4f7;border-radius:9px;padding:14px;color:#30465d;font-size:13px}.hide{display:none!important}@media(max-width:900px){.grid{grid-template-columns:repeat(2,minmax(0,1fr))}.detail{grid-template-columns:1fr}.navlinks{gap:9px}}@media(max-width:600px){.grid,.two{grid-template-columns:1fr}.hero{padding:55px 0 43px}.navinner{padding:11px 0;align-items:start;flex-direction:column}.navlinks{width:100%;gap:12px}.navlinks a{font-size:12px}.section{padding:42px 0}.card{padding:18px}}