.challenge,.problem-hub,.generator{padding:90px 0;border-top:1px solid var(--line)}
.top-links{display:flex;align-items:center;gap:16px}.support-link{padding:7px 12px;border:1px solid #315343;border-radius:9px;color:var(--green);font-size:13px;font-weight:700;text-decoration:none}
h2{margin-bottom:20px}
.section-lead{max-width:780px;margin:0 0 34px;color:var(--muted);font-size:18px}
.challenge-actions{display:flex;gap:14px;margin-top:26px;flex-wrap:wrap}
.challenge-note{font-size:13px}
.problem-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.problem-grid>a{display:block;padding:28px;border:1px solid var(--line);border-radius:16px;background:linear-gradient(145deg,#101720,#0b1017);text-decoration:none;transition:transform .18s ease,border-color .18s ease}
.problem-grid>a:hover{transform:translateY(-3px);border-color:#3e6071}
.problem-grid span{font:800 12px ui-monospace,monospace;color:var(--cyan);letter-spacing:.12em}
.problem-grid h3{margin:18px 0 8px;font-size:22px}
.problem-grid p{min-height:52px;color:var(--muted)}
.problem-grid b{color:var(--green);font-size:14px}
.support-cta{display:flex;justify-content:space-between;align-items:center;gap:24px;margin-top:22px;padding:24px 26px;border:1px solid #315343;border-radius:16px;background:linear-gradient(120deg,rgba(98,245,174,.1),rgba(101,217,255,.06))}
.support-cta b,.support-cta span{display:block}.support-cta span{margin-top:4px;color:var(--muted);font-size:14px}.support-cta a{flex:0 0 auto;padding:12px 18px;border-radius:10px;background:var(--green);color:#04120c;text-decoration:none;font-weight:800}
.after-copy-support{display:block;margin-top:4px;color:var(--green);font-size:14px;font-weight:700;text-decoration:none}
@media(max-width:820px){.problem-grid{grid-template-columns:1fr}.problem-grid p{min-height:0}}
@media(max-width:620px){.support-cta{align-items:flex-start;flex-direction:column}.support-cta a{width:100%;text-align:center}}
@media(max-width:480px){.challenge-actions>a{width:100%}.problem-hub{padding:64px 0}.top-links{gap:8px}.support-link{padding:6px 9px;font-size:12px}}