/*
* Prefixed by https://autoprefixer.github.io
* PostCSS: v8.4.12,
* Autoprefixer: v10.4.4
* Browsers: last 4 version
*/

:root {
  --ios: hsl(171, 66%, 44%);
  --ios-darker: hsl(171, 66%, 34%);
  --ios-hover: hsl(171, 56%, 54%);
  --ios-opacity: hsla(171, 66%, 44%, .2);
  --mac: hsl(233, 100%, 69%);
  --mac-darker: hsl(233, 100%, 59%);
  --mac-hover: hsl(233, 90%, 79%);
  --mac-opacity: hsla(233, 100%, 69%, .2);
  --h-color: hsl(210, 10%, 33%);
  --p-color: hsl(201, 11%, 66%);
}

* {
  margin: 0;
  padding: 0;
  -webkit-box-sizing: border-box;
          box-sizing: border-box;
}
html {
  font-size: 62.5%;
}
body {
  font-family: 'Bai Jamjuree', sans-serif;
  font-size: 1.8rem;
  line-height: 1.4;
  text-align: center;
  color: var(--p-color);
}
h1, h2, h3 {
  color: var(--h-color);
  font-weight: 600;
}
h1 {
  font-size: 3.2rem;
}
h2 {
  font-size: 2.8rem
}
h3 {
  font-size: 2.6rem;
}
p {
  max-width: 58ch;
}
.sub-grid p {
  max-width: 35ch;
}
.page {
  display: -ms-grid;
  display: grid;
  grid-gap: 16rem;
}

/* header */
header {
  padding: 12.3rem 3rem 0rem;
  background: url("../images/bg-header-mobile.png") no-repeat;
  display: -ms-grid;
  display: grid;
  -ms-grid-columns: 1fr;
  grid-template-columns: 1fr;
  grid-row-gap: 2.4rem;
  justify-items: center;
}
header img {
  margin-bottom: 4.5rem;
}

/* call to action */
.download {
  display: -ms-inline-grid;
  display: inline-grid;
  -ms-grid-columns: 1fr;
  grid-template-columns: 1fr;
  grid-gap: 2.4rem;
  width: 100%;
  margin-top: 2.5rem;
}
.call-to-action {
  display: block;
  text-decoration: none;
  font-weight: 600;
  color: hsl(360, 100%, 100%);
  padding-block: 1.5rem;
  border-radius: 50px;
}
.ios:link, ios:visited {
  background-color: var(--ios);
  border-bottom: 3px solid var(--ios-darker);
  -webkit-box-shadow: 0 10px 10px var(--ios-opacity);
          box-shadow: 0 10px 10px var(--ios-opacity);
}
.ios:hover, .ios:active {
  background-color: var(--ios-hover);
  border-bottom-color: var(--ios);
}
.mac:link, mac:visited {
  background-color: var(--mac);
  border-bottom: 3px solid var(--mac-darker);
  -webkit-box-shadow: 0 10px 10px var(--mac-opacity);
          box-shadow: 0 10px 10px var(--mac-opacity);
}
.mac:hover, .mac:active {
  background-color: var(--mac-hover);
  border-bottom-color: var(--mac);
}

/* main */
main {
  display: -ms-grid;
  display: grid;
  grid-gap: 13rem;
  padding-inline: 3rem;
  -webkit-box-pack: center;
      -ms-flex-pack: center;
          justify-content: center;
}
.track img, .access img {
  display: block;
  width:100%;
}
article {
  display: -ms-grid;
  display: grid;
  grid-gap: 2.4rem;
  justify-items: center;
}
section {
  display: -ms-grid;
  display: grid;
  grid-gap: 2.4rem;
  justify-items: center;
}
.sub-grid {
  margin-top: 4.4rem;
  display: -ms-grid;
  display: grid;
  grid-gap: 6rem;
}
.col-2 {
  width: 100%;
  display: -ms-grid;
  display: grid;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  -webkit-box-pack: center;
      -ms-flex-pack: center;
          justify-content: center;
  -ms-grid-row-align: center;
      align-self: center;
  grid-gap: 6rem;
}
.enterprise-logo {
  padding-inline: 3rem;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  justify-items: center;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
      -ms-flex-direction: column;
          flex-direction: column;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  -webkit-box-pack: justify;
      -ms-flex-pack: justify;
          justify-content: space-between;
  gap: 7rem;
}

/* footer */
footer {
  background-color: hsl(220, 1%, 97%);
  color: var(--h-color);
}
.footer-content {
  padding-block: 4.5rem;
  padding-inline: 3rem;
  display: -ms-grid;
  display: grid;
  justify-items: center;
  grid-gap: 4.5rem;
  max-width: 1110px;
  margin: auto;
}
footer img {
  width: 55px;
}
footer nav {
  display: -ms-grid;
  display: grid;
  grid-gap: 3.5rem;
}
nav a:link, nav a:visited {
  text-decoration: none;
  color: var(--h-color);
}
nav a:hover, nav a:active {
  color: var(--ios);
}
.social {
  display: -ms-grid;
  display: grid;
  grid-auto-flow: column;
  grid-gap: 4rem;
  font-size: 2.2rem;
}
.social i:hover {
  color: var(--ios)
}
.attribution-container {
  background-color: hsl(220, 1%, 97%);
}

@media only screen and (min-width: 376px) {
  header {
    background: url("../images/bg-header-desktop.png") no-repeat;
    background-size: cover;
  }
}
@media only screen and (min-width: 600px) {
  .download {
    -ms-grid-columns: 1fr 2.4rem 1fr;
    grid-template-columns: 1fr 1fr;
    width: auto;
    -webkit-box-pack: center;
        -ms-flex-pack: center;
            justify-content: center;
  }
  .call-to-action {
    width: 226px;
  }
  .enterprise-logo {
    -webkit-box-orient: horizontal;
    -webkit-box-direction: normal;
        -ms-flex-direction: row;
            flex-direction: row;
    -ms-flex-wrap: wrap;
        flex-wrap: wrap;
    -webkit-box-pack: center;
        -ms-flex-pack: center;
            justify-content: center;
  }
  footer nav {
    grid-auto-flow: column;
    grid-gap: 2.5rem;
  }
}
@media only screen and (min-width: 900px) {
  h1 {
    font-size: 4.5rem;
  }
  h2 {
    font-size: 3.6rem
  }
  h3 {
    font-size: 2.4rem;
  }
  .track .sub-grid {
    grid-gap: 0rem;
    -ms-grid-columns: 50% 0rem 50%;
    grid-template-columns: 50% 50%;
    justify-items: start;
    text-align: left;
    width: 100%;
    height: 573px;
    overflow: visible;
  }
  .col-1 {
    position: relative;
    width: 100%;
  }
  .track img {
    height: 573px;
    width: auto;
    position: absolute;
    top: 0;
    right: 0;
  }
  .col-2 {
    padding-left: 2rem;
  }
  .track .sub-grid section {
    justify-items: start;
    -ms-grid-rows: auto 2.4rem 1fr;
    grid-template-rows: auto 1fr;
  }
  .workflow .sub-grid {
    -ms-grid-columns: 1fr 4.3rem 1fr 4.3rem 1fr;
    grid-template-columns: repeat(3, 1fr);
    grid-gap: 4.3rem;
    -webkit-box-pack: center;
        -ms-flex-pack: center;
            justify-content: center;
    max-width: 1110px;
  }
  .workflow section {
    -ms-grid-rows: 40px 2.4rem auto 2.4rem 1fr;
    grid-template-rows: 40px auto 1fr;
    -webkit-box-align: center;
        -ms-flex-align: center;
            align-items: center;
  }
  .workflow section p {
    -ms-flex-item-align: baseline;
        align-self: baseline;
  }
  .enterprise-logo {
    max-width: 1110px;
    -webkit-box-pack: justify;
        -ms-flex-pack: justify;
            justify-content: space-between;
    gap: 1rem;
  }
  .footer-content {
    -ms-grid-columns: auto 4.5rem auto 4.5rem auto;
    grid-template-columns: repeat(3, auto);
    justify-items: baseline;
    -webkit-box-align: center;
        -ms-flex-align: center;
            align-items: center;
  }
  footer nav {
    -ms-grid-columns: auto 2.5rem auto 2.5rem auto;
    grid-template-columns: repeat(3, auto);
    grid-auto-flow: row;
    justify-items: baseline;
  }
  .social {
    font-size: 2.4rem;
    grid-gap: 2.4rem;
    -ms-grid-column-align: end;
        justify-self: end;
  }
}