* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; background: #f8f5f0; }
.container { max-width: 600px; margin: 50px auto; padding: 20px; background: white; border-radius: 8px; box-shadow: 0 2px 10px rgba(0,0,0,0.1); }
input, select, textarea, button { width: 100%; padding: 10px; margin: 8px 0; border: 1px solid #ddd; border-radius: 4px; }
button { background: #2c3e50; color: white; border: none; cursor: pointer; }
button:hover { background: #1a252f; }
.error { color: red; }
.success { color: green; }