:root{color-scheme:dark}*{box-sizing:border-box}body,html{margin:0;padding:0;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;background:#0b1220;color:#e5e7eb}a{color:inherit;text-decoration:none}main{min-height:100vh}.container{width:min(1080px,92%);margin:0 auto}.card{background:#111827;border:1px solid #1f2937;border-radius:12px;padding:18px}.input{width:100%;border:1px solid #374151;background:#0f172a;color:#e5e7eb;padding:11px 12px;border-radius:10px}.button{border:0;border-radius:10px;padding:10px 14px;background:#2563eb;color:white;font-weight:600;cursor:pointer}.button.secondary{background:#1f2937}.grid{display:grid;gap:14px}.grid.columns-2{grid-template-columns:repeat(2,minmax(0,1fr))}@media (max-width:860px){.grid.columns-2{grid-template-columns:1fr}}