/* Mobile-first approach */
html {
  height: -webkit-fill-available;
  scroll-behavior: smooth;
}
body {
  background-color: #0a1124;
  box-sizing: border-box;
  color: snow;
  font: 300 1.1rem/1.65 "Poppins", sans-serif;
  margin: 0;
  min-height: 100vh;
  min-height: -webkit-fill-available;
  padding: 0;
  overflow-y: scroll;
  overflow-x: hidden;
}

body *,
body *:before,
body *:after {
  box-sizing: inherit;
}
img {
  border: 0;
  display: block; /* collapse top and bottom margins */
  max-width: 100%;
}
.section {
  padding: 16px 20px;
}
.container {
  margin: 0 auto;
  max-width: 560px;
}
.gallery {
  padding-bottom: 10px;
  text-align: center;
}
.gallery-heading {
  color: #00d6c8;
  font-family: "Oswald", sans-serif;
  font-weight: 600;
 font-size: 100px;
  letter-spacing: 0.1em;
  line-height: 1.15;
  text-transform: uppercase;
  margin-top: 0;
  position: relative;
  padding-bottom: 8px;
}
.gallery-heading::after {
  content: "";
  background-color: currentColor;
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  height: 1px;
  width: 100px;
}
.gallery-grid {
  background: #283048;
  background: linear-gradient(to right, #355460, #283048);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  grid-auto-rows: minmax(200px, -webkit-max-content);
  grid-auto-rows: minmax(200px, max-content);
  grid-auto-flow: dense;
  gap: 10px;
  margin-top: 40px;
  padding: 10px;
}

/* 2020-09-20 - Idea from https://www.youtube.com/watch?v=705XCEruZFs */
@-webkit-keyframes gallery-items-animation {
  from {
    opacity: 0;
    transform: scale(0.3);
    -webkit-filter: hue-rotate(180deg);
            filter: hue-rotate(180deg);
  }
  to {
    opacity: 1;
    transform: scale(1);
    -webkit-filter: hue-rotate(0deg);
            filter: hue-rotate(0deg);
  }
}
@keyframes gallery-items-animation {
  from {
    opacity: 0;
    transform: scale(0.3);
    -webkit-filter: hue-rotate(180deg);
            filter: hue-rotate(180deg);
  }
  to {
    opacity: 1;
    transform: scale(1);
    -webkit-filter: hue-rotate(0deg);
            filter: hue-rotate(0deg);
  }
}

/* 2020-09-20 */
.gallery-item {
  -webkit-animation: gallery-items-animation 800ms ease-out;
          animation: gallery-items-animation 800ms ease-out;
  -webkit-animation-fill-mode: both;
          animation-fill-mode: both;
  /* --staggered-delay will be incremented for each item by JS on DOMContentLoaded */
  --staggered-delay: 100ms;
  -webkit-animation-delay: var(--staggered-delay);
          animation-delay: var(--staggered-delay);
}

.gallery-item img {
  border: 0;
  display: block; /* collapse top and bottom margins */
  cursor: pointer;
  -o-object-fit: cover;
  object-fit: cover;
  width: 100%;
  height: 100%;
}

.gallery-item-text {
  display: none;
}

/*******************************
       .lightbox styles
*******************************/
.lightbox {
  display: flex;
  align-items: center;
  justify-content: center;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.5s;
  z-index: 10;
}

/* .preload will be removed by JS code during DOMContentLoaded event. This is done to avoid lightbox transition appearing on page load. */
.lightbox.preload {
  transition: none !important;
}

.lightbox.open {
  opacity: 1;
  pointer-events: auto;
}

.lightbox .lb-content {
  background-color: lightgray;
  display: flex;
  flex-direction: column;
  justify-content: center;
  margin: 1em;
  max-height: 90%;
  padding: 1rem;
  position: relative;
}

.lightbox .lb-img {
  -o-object-fit: contain;
  object-fit: contain;
  margin-bottom: 8px;
  display: block;
  width: 100%;
  height: auto;
}

.lightbox .lb-caption {
  color: #333;
  display: flex;
  flex-direction: column;
  font-size: 0.9rem;
  max-width: 50ch;
  overflow-y: auto; /* may occur in smartphones */
  opacity: 0;
  transition: opacity 0.3s;
}

.lightbox.open .lb-caption {
  opacity: 1;
}

.lightbox .lb-url {
  color: #005fa9;
  text-decoration: underline;
  text-underline-position: under;
  padding-top: 8px;
  padding-bottom: 14px;
}

.lightbox .close {
  background-color: lightgray;
  cursor: pointer;
  color: #333;
  text-decoration: none;
  display: inline-block;
  font-size: 2em;
  line-height: 1em;
  text-align: center;
  position: absolute;
  top: -0.4em;
  right: -0.4em;
  width: 1em;
  height: 1em;
  border-radius: 50%;
}

/* Lightbox overlay */
.lightbox .close::before {
  background-color: rgba(0, 0, 0, 0.9);
  content: "";
  cursor: default;
  position: fixed;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
}

/**********************************
          Media queries
 **********************************/

/* Medium devices (landscape tablets, 768px and up) */
@media screen and (min-width: 768px) {
  .container {
    max-width: 720px;
  }
  .lightbox .lb-caption {
    font-size: 1rem;
  }
}

/* Large devices (laptops/desktops, 1024px and up) */
@media screen and (min-width: 1024px) {
  .container {
    max-width: 960px;
  }
  .lightbox .lb-content {
    flex-direction: row;
  }

  .lightbox .lb-img {
    margin-bottom: 0;
  }

  .lightbox .lb-caption {
    padding: 0 1.5em;
  }
  .lightbox .lb-url {
    padding-top: 0;
  }
}
.footer {
  color: snow;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100px;
}
.footer svg {
  fill: snow;
}
.footer a {
  color: inherit;
  margin-left: 10px;
  text-decoration: underline;
  text-underline-position: under;
}