.aprender .w{max-width:900px}.aprender h1{font-size:clamp(30px,4.2vw,52px);margin:10px 0 14px}
.niveis{list-style:none;margin:30px 0 0;padding:0;display:grid;gap:18px;counter-reset:nivel}
.nivel{background:var(--painel);border:1px solid var(--line);border-radius:16px;padding:24px 24px 26px;position:relative}
.nivel h2{font-size:clamp(22px,2.6vw,30px);margin:4px 0 14px}.nivel h3{font:400 12px/1.4 "JetBrains Mono",monospace;letter-spacing:.14em;text-transform:uppercase;color:var(--dim);margin:16px 0 6px}
.nivel p{margin:0 0 4px;color:rgba(244,247,248,.86)}.nivel .k{margin:0}
.exercicios{margin:0;padding-left:22px}.exercicios li{margin:4px 0;color:rgba(244,247,248,.86)}
.nivel .prova{border-left:3px solid var(--brand);padding-left:12px}
.nivel .bt{margin-top:18px}
@media (max-width:640px){.nivel{padding:18px 16px 20px}}