.theme-btn{border:1px solid var(--line);border-radius:9px;background:var(--panel);color:var(--muted);padding:8px 12px;cursor:pointer}.page-cards{grid-template-columns:repeat(3,minmax(0,1fr))}.question-card{padding:17px;border:1px solid var(--line);border-radius:12px;background:var(--bg2)}.question-options{display:grid;gap:8px}.question-option{display:flex;gap:9px;padding:10px;border:1px solid var(--line);border-radius:8px;background:var(--panel);cursor:pointer}.question-option.right{border-color:var(--green);background:rgba(52,211,153,.1)}.question-option.wrong{border-color:var(--red);background:rgba(248,113,113,.1)}.question-feedback{margin-top:12px;padding:10px;border-radius:8px;background:var(--panel)}.lab-steps{display:grid;gap:9px;margin:14px 0;padding:0;list-style:none}.lab-steps li{padding:11px 13px;border:1px solid var(--line);border-radius:9px;background:var(--bg2)}.lab-steps b{color:var(--cyan)}@media(max-width:760px){.page-cards{grid-template-columns:1fr}}