* { margin: 0; padding: 0; box-sizing: border-box; }
html { overflow-x: hidden; }
body { font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; background: #f9fafb; color: #1f2937; line-height: 1.6; }
a { color: #dc2626; text-decoration: none; }
a:hover { text-decoration: underline; }
button:hover { transform: translateY(-2px); box-shadow: 0 4px 12px rgba(0,0,0,0.15); }
input:focus { outline: none; border-color: #dc2626 !important; box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.1); }
@media (max-width: 768px) {
  nav { display: none !important; }
  h1 { font-size: 2rem !important; }
  h2 { font-size: 1.5rem !important; }
  [style*="grid-template-columns"] { grid-template-columns: 1fr !important; }
}