.projects-page-filters {
  width: 80%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin: 0 auto;
  padding: 120px 0 45px 0;
}
.projects-page-filters button {
  position: relative;
  font-size: 10px;
  line-height: 12px;
  letter-spacing: 0.16em;
  color: #181818;
  font-weight: 400;
  text-transform: uppercase;
  padding-bottom: 2px;
  border: none;
  background: none;
  transition: color 0.3s ease;
}
.projects-page-filters button::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background: #000;
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.35s ease;
}
.projects-page-filters button:hover {
  color: #000;
}
.projects-page-filters button:hover::after {
  transform: scaleX(1);
}
.projects-page-filters button.active {
  color: #4d4d4d;
}
.projects-page-filters button.active::after {
  transform: scaleX(1);
}

.projects-page-list {
  display: flex;
  flex-wrap: wrap;
 
}
.projects-page-item {
  width: 25%;
  height: 350px;
  transition: opacity 0.3s ease;
}
.projects-page-item.hidden {
  opacity: 0;
  pointer-events: none;
}
.projects-page-link {
  width: 100%;
  height: 100%;
  background-repeat: no-repeat;
  background-size: cover;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  gap: 10px;
  padding: 24px 28px;
  position: relative;
  overflow: hidden;
  /* затемнение фона */
  /* стартовое состояние элементов */
  /* плавная последовательность */
}
.projects-page-link::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0);
  transition: background 0.4s ease;
  z-index: 1;
}
.projects-page-link span {
  transform: translateY(20px);
  opacity: 0;
  transition: transform 0.45s ease, opacity 0.45s ease;
  z-index: 2;
}
.projects-page-link:hover::before {
  background: rgba(0, 0, 0, 0.45);
}
.projects-page-link:hover span {
  transform: translateY(0);
  opacity: 1;
}
.projects-page-link:hover span.projects-page-label{
  opacity: 0.6;
}
.projects-page-link span:nth-child(1) {
  transition-delay: 0.05s;
}
.projects-page-link span:nth-child(2) {
  transition-delay: 0.12s;
}
.projects-page-link span:nth-child(3) {
  transition-delay: 0.18s;
}
.projects-page-label {
  color: #fff;
  font-size: 10px;
  font-weight: 400;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  opacity: 0.6;
}
.projects-page-concept {
  position: absolute;
  top: 24px;
  right: 28px;
  display: flex;
  align-items: center;
  gap: 12px;
  color: #fff;
 font-size: 10px;
  line-height: 19px;
  letter-spacing: 0.15em;
  font-weight: 400;
  text-transform: uppercase;
  z-index: 2;
}
.projects-page-name {
  font-size: 24px;
  line-height: 130%;
  font-weight: 300;
  color: #fafafa;
}
.projects-page-filters-mobile {
  display: none;
}

@media screen and (max-width: 1760px){
    .projects-page-item {
        height: 250px;
    }
}

@media screen and (max-width: 1200px){
    .projects-page-item {
        width: 33.3333333333%;
    }
    .projects-page-filters {
        width: 100%;
        padding: 50px 24px;
    }
}

@media screen and (max-width: 992px){
    .projects-page-filters {
        display: none;
    }
    /* контейнер */
    .projects-page-filters-mobile {
        display: block;
        position: relative;
        width: 100%;
        max-width: 100%;
        font-size: 16px;
        -webkit-user-select: none;
        -moz-user-select: none;
                user-select: none;
        padding: 26px 24px;
        border-top: 1px solid #00000024;
    }
     /* открытый дропдаун */
    .projects-page-filters-mobile.open .ppf-mobile-list {
        display: block;
    }
    .projects-page-filters-mobile.open .ppf-mobile-selected .ppf-mobile-arrow {
        transform: rotate(135deg);
    }
    .projects-page-item {
        width: 50%;
    }
    .projects-page-link span {
        opacity: 0.6;
        transform: initial;
    }
    .projects-page-link::before {
        background: rgba(0, 0, 0, 0.45);
    }
    .projects-page-link span.projects-page-name{
      opacity: 1;
    }
    /* выбранное поле */
    .ppf-mobile-selected {
        cursor: pointer;
        position: relative;
        display: flex;
        align-items: center;
        justify-content: space-between;
        font-size: 10px;
        line-height: 12px;
        letter-spacing: 0.16em;
        font-weight: 400;
        color: #999999;
        text-transform: uppercase;
    }
    .ppf-mobile-selected .ppf-mobile-arrow {
        width: 10px;
        height: 10px;
        display: block;
        border-left: 1px solid #999999;
        border-bottom: 1px solid #999999;
        transform: rotate(-45deg);
        transition: 0.25s;
    }
    /* выпадающий список */
    .ppf-mobile-list {
        margin-top: 4px;
        background: #fff;
        overflow: hidden;
        display: none;
        position: absolute;
        left: 0;
        width: 100%;
        padding: 24px;
        z-index: 5;
    }
    /* элементы списка */
    .ppf-mobile-item {
        padding-bottom: 10px;
        cursor: pointer;
        transition: 0.2s;
        font-size: 10px;
        line-height: 12px;
        letter-spacing: 0.16em;
        font-weight: 400;
        color: #999999;
        text-transform: uppercase;
    }
    .ppf-mobile-item:hover {
        background: #f4f4f4;
    }
}

@media screen and (max-width: 768px){
    .projects-page-item {
        width: 100%;
    }
}