.form-group {
    margin-bottom: 15px;
}

label {
    display: block;
    margin-bottom: 5px;
}

input[type="text"],
input[type="email"],
input[type="tel"],
textarea,
select {
    width: 100%;
    padding: 8px;
    box-sizing: border-box;
}

.checkbox-group,
.radio-group {
    display: flex;
    flex-direction: column;
    margin-bottom: 15px;
}

.checkbox-group input,
.radio-group input {
    margin-right: 10px;
}

.submit-btn {
    background-color: #000;
    color: #fff;
    padding: 10px 20px;
    border: none;
    cursor: pointer;
}