* { box-sizing: border-box; }
body { font-family: system-ui, -apple-system, sans-serif; margin: 0;
       color: #222; background: #fafafa; }
header { display: flex; align-items: center; gap: 16px; padding: 12px 16px;
         background: #fff; border-bottom: 1px solid #eee; }
header .brand { font-weight: 700; text-decoration: none; color: inherit; }
header nav { display: flex; gap: 12px; flex: 1; }
header nav a { text-decoration: none; color: #444; }
main { max-width: 960px; margin: 0 auto; padding: 16px; }
form p { margin: 8px 0; }
button, input, select, textarea { font: inherit; padding: 8px;
                                  border: 1px solid #ccc; border-radius: 4px; }
button { background: #2a6; color: white; border: 0; cursor: pointer; }
.lang-switch { margin-left: auto; }
@media (max-width: 600px) { header { flex-wrap: wrap; } }