.portfolio {
  margin: 60px 0px 30px 0px;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.button_portfolio {
  display: flex;
  align-items: center;
  justify-content: center;

  & > a {
    margin-block: 40px;
    text-decoration: none;

    & > button {
      color: var(--color-1);
      padding: 10px 20px 10px 30px;
      display: flex;
      align-items: center;
      justify-content: center;
      background-color: transparent;
      border: 1px solid var(--color-1);
      border-radius: 10px;
      font-size: 20px;
      cursor: pointer;
      transition: 0.4s all ease-in-out;

      & > i {
        margin-left: 15px;
        font-size: 25px;
      }

      &:hover {
        background-color: var(--color-1);
        color: var(--color-white);
      }
    }
  }
}

.nl_title {
  width: max-content;
  display: block;
  align-items: center;
  align-self: center;

  & > h1 {
    color: var(--color-2);
    font-size: var(--title-size);
  }

  & > hr {
    width: 110px;
    margin-top: 10px;
    margin-inline: auto;
    border: none;
    height: 2px;
    background: var(--color-1);
  }
}

.container_portfolio_items {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  max-width: 1400px;
  width: 90%;
  margin: auto;
  margin-top: 40px;
  gap: 12px;
}
.portfolio_item {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 200px;
  border-radius: 6px;
  position: relative;
  text-decoration: none;
  overflow: hidden;
  background-position: center;
  background-repeat: no-repeat;
  background-size: 150%;
  transition: background-size 0.5s ease;
}
.portfolio_item::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0);
  pointer-events: none;
  z-index: 1;
  transition: background-color 0.4s ease;
}

.portfolio_content {
  position: absolute;
  z-index: 2;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
  opacity: 0;
  transition: 0.4s ease;
  width: 80%;
}

.portfolio_content h2 {
  color: #fff;
  font-size: 20px;
  margin-bottom: 10px;
}

.portfolio_content p {
  color: #fff;
  font-size: 14px;
}

.portfolio_item:hover {
  background-size: 170%;
}
.portfolio_item:hover::after {
  background-color: rgba(0, 0, 0, 0.6);
}
.portfolio_item:hover .portfolio_content {
  opacity: 1;
}

@media (max-width: 750px) {
  .container_portfolio_items {
    grid-template-columns: repeat(1, 1fr);
  }

  .portfolio_item {
    height: 160px;
    background-size: cover;
  }

  .portfolio_content {
    opacity: 1 !important;
  }

  .portfolio_item::after {
    background-color: rgba(0, 0, 0, 0.4);
  }
}