* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'Open Sans', Arial, sans-serif; background: linear-gradient(135deg, #059598 0%, #013f54 100%); min-height: 100vh; display: flex; align-items: center; justify-content: center; }
.login-container { background: white; padding: 40px; border-radius: 15px; box-shadow: 0 20px 40px rgba(0,0,0,0.3); width: 100%; max-width: 400px; }
.login-header { text-align: center; margin-bottom: 30px; }
.login-header h1 { color: #013f54; margin-bottom: 10px; font-size: 2rem; }
.form-group { margin-bottom: 20px; }
.form-group label { display: block; margin-bottom: 8px; font-weight: 600; color: #333; }
.form-group input { width: 100%; padding: 12px 16px; border: 1px solid #ddd; border-radius: 8px; font-size: 16px; }
.login-btn { width: 100%; padding: 12px 16px; background: linear-gradient(135deg, #059598 0%, #013f54 100%); color: white; border: none; border-radius: 8px; font-size: 16px; font-weight: 600; cursor: pointer; }
.alert { padding: 12px 16px; margin-bottom: 20px; border-radius: 8px; display: none; }
.alert-error { background: #f8d7da; border: 1px solid #f5c6cb; color: #721c24; }
.alert-success { background: #d4edda; border: 1px solid #c3e6cb; color: #155724; }