:root{--ink:#1a1a1a;--paper:#fffdf7;--yellow:#fcd848;--blue:#0f5e7c;--teal:#0a7f75;--magenta:#c00c54;--pink:#f9d3e0;--mint:#d5f1ec;--muted:#5c5c5c}*{box-sizing:border-box}body{background:var(--paper);color:var(--ink);margin:0;font-family:Poppins,system-ui,-apple-system,Segoe UI,sans-serif;line-height:1.5}a{color:inherit}.bar{border-bottom:3px solid var(--ink);background:#fff;justify-content:space-between;align-items:center;gap:12px;padding:12px 16px;display:flex}.brand img{width:auto;height:44px;display:block}.bar nav{flex-wrap:wrap;align-items:center;gap:14px;font-weight:700;display:flex}.bar nav a{text-decoration:none}.bar nav a:hover{text-decoration:underline}.btn{font:inherit;border:2px solid var(--ink);background:var(--yellow);color:var(--ink);box-shadow:3px 3px 0 var(--ink);border-radius:12px;padding:9px 16px;font-weight:800;display:inline-block;text-decoration:none!important}.btn-plain{background:#fff}main{max-width:960px;margin:0 auto;padding:32px 16px 64px}.hero h1{color:var(--blue);margin:0 0 12px;font-size:clamp(30px,6vw,52px);line-height:1.05}.kicker{letter-spacing:.14em;text-transform:uppercase;color:var(--magenta);margin:0 0 8px;font-size:12px;font-weight:800}.lead{max-width:46ch;font-size:18px}.actions{flex-wrap:wrap;gap:12px;margin-top:20px;display:flex}.cards{grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:18px;margin-top:24px;display:grid}.card{border:2px solid var(--ink);box-shadow:5px 5px 0 var(--ink);background:#fff;border-radius:16px;padding:20px;text-decoration:none;display:block}.card:hover{background:var(--mint)}.card h2{color:var(--blue);margin:8px 0 6px}.card p{margin:0}.tag{background:var(--yellow);border:2px solid var(--ink);border-radius:999px;padding:1px 10px;font-size:12px;font-weight:800;display:inline-block}.auth{justify-content:center;padding-top:16px;display:flex}@media (max-width:520px){.brand img{height:36px}.bar nav{gap:10px;font-size:14px}}.notice{border:2px solid var(--ink);border-left:8px solid var(--yellow);background:#fff;border-radius:12px;padding:12px 14px;font-weight:600}.small{color:var(--muted);font-size:14px}.course{flex-direction:column;display:flex}.course .buy{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;margin-top:auto;padding-top:16px;display:flex}.course .price{color:var(--blue);font-size:22px;font-weight:800}.course.owned{background:var(--mint)}.course.bundle{background:#fff8d6;border-width:3px}.btn:disabled{opacity:.5;cursor:wait}button.btn{cursor:pointer}.foot{border-top:2px solid var(--ink);flex-wrap:wrap;justify-content:center;gap:8px 20px;padding:20px 16px 32px;font-size:14px;font-weight:600;display:flex}.foot a{color:var(--blue)}