.overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 999;
    display: none;
} 

.centered-div {
    position: fixed;
    width: 70%;
    min-height: 300px;
    background: white;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    padding: 30px;
    display: none;
    z-index: 1000;
    overflow: hidden;
}

.centered-div .close-btn {
    position: absolute;
    top: 15px;
    right: 20px;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: #666;
    cursor: pointer;
    padding: 5px;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.centered-div .close-btn:hover {
    color: #ff4757;
}



#registrationForm .form-label {
    font-weight: 600;
    color: #2c3e50;
    margin-bottom: 8px;
}

#registrationForm .form-control, .form-select {
    border-radius: 8px;
    padding: 12px 15px;
    border: 2px solid #e9ecef;
    transition: all 0.3s;
}

#registrationForm .form-control:focus, .form-select:focus {
    border-color: #3498db;
    box-shadow: 0 0 0 0.25rem rgba(52, 152, 219, 0.25);
}

#registrationForm .is-invalid {
    border-color: #e74c3c;
}

#registrationForm .is-valid {
    border-color: #2ecc71;
}

#registrationForm .invalid-feedback {
    display: none;
    color: #e74c3c;
    font-size: 0.875rem;
    margin-top: 5px;
}

#registrationForm .valid-feedback {
    display: none;
    color: #2ecc71;
    font-size: 0.875rem;
    margin-top: 5px;
}

#registrationForm .btn-submit {
    background: linear-gradient(135deg, #3498db 0%, #2c3e50 100%);
    border: none;
    color: white;
    padding: 12px 30px;
    border-radius: 8px;
    font-weight: 600;
    width: 100%;
    transition: all 0.3s;
    margin-top: 10px;
}

#registrationForm .btn-submit:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

#registrationForm .btn-submit:disabled {
    background: #bdc3c7;
    transform: none;
    box-shadow: none;
}

#registrationForm .alert {
    border-radius: 8px;
    border: none;
    padding: 15px 20px;
    margin-top: 20px;
}


#registrationForm .d-none {
    display: none !important;
}