:root {
    --primary-color: #3498db;
    --primary-dark: #2980b9;
    --error-color: #e74c3c;
    --success-color: #2ecc71;
    --text-color: #333;
    --light-gray: #f5f5f5;
    --border-color: #ddd;
    --border-radius: 4px;
    --box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.complex-flight .container {
    max-width: 900px;
    margin: 0 auto;
    background: white;
    padding: 30px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

.complex-flight h1 {
    text-align: center;
    margin-bottom: 30px;
    color: var(--primary-dark);
}

.complex-flight fieldset {
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 20px;
    margin-bottom: 20px;
}

.complex-flight legend {
    padding: 0 10px;
    font-weight: bold;
    color: var(--primary-dark);
}

.complex-flight .form-row {
    display: flex;
    flex-wrap: wrap;
    margin: 0 -10px;
}

.complex-flight .form-group {
    flex: 1 0 200px;
    margin: 0 10px 15px;
    min-width: 0;
}

.complex-flight label {
    display: block;
    margin-bottom: 5px;
    font-weight: 600;
}

.complex-flight input[type="text"],
.complex-flight input[type="email"],
.complex-flight input[type="tel"],
.complex-flight input[type="date"],
.complex-flight input[type="password"],
.complex-flight select,
.complex-flight textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 16px;
}

.complex-flight input:focus,
.complex-flight select:focus,
.complex-flight textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(52, 152, 219, 0.2);
}

.complex-flight .checkbox-group {
    display: flex;
    align-items: center;
}

.complex-flight .checkbox-group input {
    width: auto;
    margin-right: 10px;
}

.complex-flight .error {
    color: var(--error-color);
    font-size: 14px;
    margin-top: 5px;
    display: block;
}

.complex-flight .alert {
    padding: 10px 15px;
    margin-bottom: 20px;
    border-radius: var(--border-radius);
}

.complex-flight .alert.error {
    background-color: rgba(231, 76, 60, 0.1);
    border-left: 4px solid var(--error-color);
}

.complex-flight .alert.success {
    background-color: rgba(46, 204, 113, 0.1);
    border-left: 4px solid var(--success-color);
}

.complex-flight .submit-btn {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 12px 20px;
    font-size: 16px;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: background-color 0.3s;
    width: 100%;
}

.complex-flight .submit-btn:hover {
    background-color: var(--primary-dark);
}

.complex-flight .form-actions {
    text-align: center;
    margin-top: 20px;
}

/* Responsive Design */
@media (max-width: 768px) {
    .complex-flight .form-group {
        flex: 1 0 100%;
    }
    
    .complex-flight .container {
        padding: 20px;
    }
}

@media (max-width: 480px) {
    
    .complex-flight fieldset {
        padding: 15px;
    }
}