.propane-form {
    display: flex;
    max-width: 600px;
    margin: 20px auto;
}

.propane-form p {
    flex: 1;
    margin: 0;
    display: flex;
    flex-direction: column;
    padding: 10px;
}

.propane-form p + p {
    border-left: 1px solid #ccc;
}

.propane-form .form-title {
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 16px;
    text-transform: uppercase;
    color: #000!important;
    font-weight: 600;
    flex: 0 0 auto;
    flex-direction: row;
    padding-right:30px;

}
.propane-form p.label_forms {
    border:1px solid #ccc;
}


.propane-form .button-wrapper {
    flex: 0 0 auto;
    padding: 0;
}

.propane-form label {
    font-size: 12px;
    text-transform: uppercase;
    color: #666;
    margin-bottom: 4px;
}

.propane-form select,
.propane-form input {
    border: none;
    font-size: 20px;
    padding: 0;
    background: transparent;
}

.propane-form input::placeholder {
    color: #999;
    opacity: 1;
}

.propane-form button {
    height: 100%;
    padding: 0 20px;
    background: #000;
    color: #fff;
    border: none;
    text-transform: uppercase;
    cursor: pointer;
}

.propane-result {
    max-width: 600px;
    margin: 20px auto;
    padding: 15px;
    background: #e0ffe0;
    border: 1px solid #b2d8b2;
    border-radius: 8px;
}

@media (max-width: 900px) {
    .propane-form {
        flex-wrap: wrap;
        padding: 0 15px;
    }

    .propane-form p {
        flex: 1 1 50%;
        border-left: none;
    }

    .propane-form p + p {
        border-left: none;
    }

    .propane-form .button-wrapper {
        width: 100%;
        margin-top: 10px;
    }
}

@media (max-width: 600px) {
    .propane-form {
        flex-direction: column;
        padding: 0 10px;
    }

    .propane-form p {
        flex: 1 1 100%;
        padding: 10px 0;
    }

    .propane-form .form-title {
        padding-right: 0;
        margin-bottom: 10px;
    }

    .propane-form .button-wrapper {
        padding: 10px 0 0;
    }

    .propane-form button {
        width: 100%;
    }
}