Aligning Div with Centre

Question

I am having an issue aligning a image gallery to the center. I would like to align the row of 3 images to the center. This is my code:

function openModal() {
  document.getElementById("myModal").style.display = "block";
}

function closeModal() {
  document.getElementById("myModal").style.display = "none";
}

var slideIndex = 1;
showSlides(slideIndex);

function plusSlides(n) {
  showSlides(slideIndex += n);
}

function currentSlide(n) {
  showSlides(slideIndex = n);
}

function showSlides(n) {
  var i;
  var slides = document.getElementsByClassName("slideshow");
  var dots = document.getElementsByClassName("demo");
  var captionText = document.getElementById("caption");
  if (n > slides.length) {
    slideIndex = 1
  }
  if (n < 1) {
    slideIndex = slides.length
  }
  for (i = 0; i < slides.length; i++) {
    slides[i].style.display = "none";
  }
  for (i = 0; i < dots.length; i++) {
    dots[i].className = dots[i].className.replace(" active", "");
  }
  slides[slideIndex - 1].style.display = "block";
  dots[slideIndex - 1].className += " active";
  captionText.innerHTML = dots[slideIndex - 1].alt;
}

.row>.column {
  padding: 0 8px;
}

.row:after {
  content: "";
  display: table;
  clear: both;
}

.column {
  float: left;
  width: 33%;
}


/* The Modal (background) */

.modal {
  display: none;
  position: fixed;
  z-index: 1;
  padding-top: 100px;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  overflow: auto;
  background-color: black;
}


/* Modal Content */

.modal-content {
  position: relative;
  background-color: #fefefe;
  margin: auto;
  padding: 0;
  width: 90%;
  max-width: 1200px;
}


/* The Close Button */

.close {
  color: white;
  position: absolute;
  top: 10px;
  right: 25px;
  font-size: 35px;
  font-weight: bold;
}

.close:hover,
.close:focus {
  color: #999;
  text-decoration: none;
  cursor: pointer;
}

.slideshow {
  display: none;
}

.cursor {
  cursor: pointer;
}


/* Next & previous buttons */

.prev,
.next {
  cursor: pointer;
  position: absolute;
  top: 50%;
  width: auto;
  padding: 16px;
  margin-top: -50px;
  color: white;
  font-weight: bold;
  font-size: 20px;
  transition: 0.6s ease;
  border-radius: 0 3px 3px 0;
  user-select: none;
  -webkit-user-select: none;
}


/* Position the "next button" to the right */

.next {
  right: 0;
  border-radius: 3px 0 0 3px;
}


/* On hover, add a black background color with a little bit see-through */

.prev:hover,
.next:hover {
  background-color: rgba(0, 0, 0, 0.8);
}


/* Number text (1/3 etc) */

.numbertext {
  color: #f2f2f2;
  font-size: 12px;
  padding: 8px 12px;
  position: absolute;
  top: 0;
}

img {
  margin-bottom: -4px;
}

.caption-container {
  text-align: center;
  background-color: black;
  padding: 2px 16px;
  color: white;
}

.demo {
  opacity: 0.6;
}

.active,
.demo:hover {
  opacity: 1;
}

img.hover-shadow {
  transition: 0.3s;
}

.hover-shadow:hover {
  box-shadow: 0 8px 16px 0 rgba(103, 101, 101, 0.4), 0 12px 40px 0 rgba(103, 101, 101, 0.19);
}

.gallery {
  width: 80%;
}

.center {
  text-align: center;
  display: inline-block
}

<div class="gallery">
  <!-- Images used to open the lightbox -->
  <div class="center" align="center">
    <div class="row">
      <center>
        <div class="column">
          <img src="images/gallery/gallery/small/img1.jpg" onclick="openModal();currentSlide(1)" class="hover-shadow" width=90%>
        </div>
        <div class="column">
          <img src="images/gallery/gallery/small/img2.jpg" onclick="openModal();currentSlide(2)" class="hover-shadow" width=90%>
        </div>
        <div class="column">
          <img src="images/gallery/gallery/small/img3.jpg" onclick="openModal();currentSlide(3)" class="hover-shadow">
        </div>
        <div class="column">
          <img src="images/gallery/gallery/img1.jpg" onclick="openModal();currentSlide(4)" class="hover-shadow">
        </div>
      </center>
    </div>
  </div>

  <!-- The Modal/Lightbox -->
  <div id="myModal" class="modal">
    <span class="close cursor" onclick="closeModal()">&times;</span>
    <div class="modal-content">

      <div class="slideshow">
        <div class="numbertext">1 / 4</div>
        <img src="images/gallery/gallery/large/img1.jpg" style="width:100%">
      </div>

      <div class="slideshow">
        <div class="numbertext">2 / 4</div>
        <img src="images/gallery/gallery/large/img2.jpg" style="width:100%">
      </div>

      <div class="slideshow">
        <div class="numbertext">3 / 4</div>
        <img src="images/gallery/gallery/large/img3.jpg" style="width:100%">
      </div>

      <div class="slideshow">
        <div class="numbertext">4 / 4</div>
        <img src="images/gallery/gallery/img1.jpg" style="width:100%">
      </div>

      <!-- Next/previous controls -->
      <a class="prev" onclick="plusSlides(-1)">&#10094;</a>
      <a class="next" onclick="plusSlides(1)">&#10095;</a>

      <!-- Caption text -->
      <div class="caption-container">
        <p id="caption"></p>
      </div>

      <!-- Thumbnail image controls -->
      <div class="column">
        <img class="demo" src="images/gallery/gallery/small/img1.jpg" onclick="currentSlide(1)" alt="Nature">
      </div>

      <div class="column">
        <img class="demo" src="images/gallery/gallery/small/img2.jpg" onclick="currentSlide(2)" alt="Snow">
      </div>

      <div class="column">
        <img class="demo" src="images/gallery/gallery/small/img3.jpg" onclick="currentSlide(3)" alt="Mountains">
      </div>

      <div class="column">
        <img class="demo" src="images/gallery/gallery/img1.jpg" onclick="currentSlide(4)" alt="Lights">
      </div>
    </div>
  </div>
</div>

Image of what it currently looks like:

NOTE: THIS IS ONLY THE CODE FOR THIS SECTION.

Thanks.

Answer 1

Try doing . gallery { width:80%; right : 10%}