discourse/app/assets/stylesheets/common/admin/customize-install-theme.scss

.admin-install-theme-modal {
  .modal-inner-container {
    width: 100%;
  }
}

.install-theme {
  display: flex;
  @include breakpoint(mobile-extra-large) {
    .install-theme-items {
      flex: 0 0 150px;
    }
    .install-theme-content {
      flex: 1 1 100%;
    }
    .select-kit {
      width: 100%;
    }
  }
}

.install-theme-items {
  width: 200px;
}

.install-theme-item {
  border: 1px solid var(--primary-low);
  border-bottom: none;
  position: relative;

  &:last-child {
    border-bottom: 1px solid var(--primary-low);
  }

  input,
  .d-icon-caret-right {
    display: none;
  }

  label {
    display: block;
    padding: 10px 30px 10px 10px;
    margin-bottom: 0px;
    cursor: pointer;
  }

  input:checked + label {
    color: var(--secondary);
    background-color: var(--tertiary);
    + .d-icon {
      display: block;
      color: var(--secondary);
    }
  }

  .d-icon-caret-right {
    position: absolute;
    right: 5px;
    top: 50%;
    margin-top: -7px;
  }
}

.install-theme-content {
  width: calc(100% - 20px);
  input[type="file"] {
    width: 100%;
    overflow: hidden; // Chrome needs this
  }
}

.install-theme-items + .install-theme-content {
  padding: 0px 0px 10px 20px;
  width: calc(100% - 200px);
}

.repo {
  input[type="text"] {
    width: 90%;
  }
}

.popular-theme-items {
  height: 65vh;
  overflow: auto;
  padding-right: 20px;
}

.popular-theme-item {
  border-bottom: 1px solid var(--primary-low);
  padding: 8px 0px;
  display: flex;
  align-items: center;

  @include breakpoint(mobile-extra-large) {
    flex-direction: column;
    align-items: initial;
  }
  .popular-theme-name {
    flex: 1;
    .popular-theme-type {
      font-weight: normal;
      font-size: var(--font-down-2);
      color: var(--primary-medium);
    }

    a {
      color: var(--primary-very-high);
      font-weight: bold;
      &:hover,
      &:visited,
      &:active {
        color: var(--primary-high);
      }
    }

    .popular-theme-description {
      font-size: var(--font-down-1);
      padding-right: 20px;
    }
  }
  .popular-theme-buttons {
    @include breakpoint(mobile-extra-large) {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-top: 0.25em;
    }

    > span {
      font-style: italic;
      font-size: var(--font-down-1);
      color: var(--primary-medium);
      margin-right: 8px;
    }

    > a {
      display: block;
      font-size: var(--font-down-2);
      margin-top: 5px;
      text-align: center;
    }
  }
}

.install-theme-warning {
  margin-bottom: 10px;
}