* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); min-height: 100vh; padding: 20px; }
.container { max-width: 900px; margin: 0 auto; background: white; border-radius: 20px; box-shadow: 0 20px 40px rgba(0,0,0,0.1); overflow: hidden; }
.header { background: linear-gradient(135deg, #22543d, #2b6cb0); color: white; padding: 40px; text-align: center; }
.header h1 { font-size: 2.5em; margin-bottom: 10px; }
.input-section { padding: 50px; text-align: center; }
select, button { padding: 18px 35px; font-size: 18px; border: none; border-radius: 12px; margin: 15px; }
select { background: #f8f9ff; border: 3px solid #e2e8f0; width: 250px; font-weight: bold; }
button { background: linear-gradient(135deg, #38a169, #48bb78); color: white; cursor: pointer; font-weight: bold; transition: all 0.3s; box-shadow: 0 5px 15px rgba(56,161,105,0.4); }
button:hover { transform: translateY(-2px); box-shadow: 0 8px 25px rgba(56,161,105,0.6); }
button:active { transform: translateY(0); }
.loading { display: none; text-align: center; padding: 50px; font-size: 20px; color: #38a169; background: #f0fff4; }
.success { display: none; text-align: center; padding: 30px; background: #d4edda; color: #155724; border-radius: 10px; margin: 20px; }
@media (max-width: 768px) { 
    .input-section { padding: 30px 20px; } 
    .header h1 { font-size: 2em; } 
    select { width: 100%; max-width: 300px; } 
}