:root {
  --portfolio-dark: #474747;
  --portfolio-text: #5b5b5b;
  --portfolio-surface: #e6e6e6;
  --portfolio-accent: #fbae17;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 0;
  color: var(--portfolio-text);
  font-family: Roboto, Arial, sans-serif;
  background: #fff;
}

button,
a {
  font: inherit;
}

.portfolio-intro {
  border-bottom: 1px solid #bbb;
  background: #fff;
}

.portfolio-intro__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 30px 24px 39px;
}

.portfolio-intro__title {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.portfolio-intro__text {
  max-width: 900px;
  margin: 0;
  font-size: 18px;
  font-weight: 300;
  line-height: 1.45;
  text-align: center;
}

.portfolio-catalog__heading {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.portfolio-catalog__filter-menu {
  background: #fff;
}

.portfolio-catalog__filters {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(35px, 4vw, 78px);
  min-height: 106px;
  padding: 23px 24px;
  background: #fff;
}

.portfolio-catalog__filter {
  padding: 0 0 6px;
  border: 0;
  border-bottom: 1px solid currentColor;
  color: var(--portfolio-text);
  background: transparent;
  font-size: 24px;
  font-weight: 300;
  line-height: 1.1;
  text-transform: uppercase;
  cursor: pointer;
  transition: color .2s ease, transform .2s ease;
}

.portfolio-catalog__filter:hover,
.portfolio-catalog__filter:focus-visible {
  color: var(--portfolio-accent);
  transform: translateY(-2px);
  outline: none;
}

.portfolio-catalog__filter--active {
  color: var(--portfolio-accent);
}

.portfolio-catalog__surface {
  min-height: 700px;
  padding: 40px max(5.5%, 30px) 86px;
  background: var(--portfolio-surface);
}

.portfolio-catalog__list {
  display: flex;
  flex-wrap: wrap;
  gap: 61px 40px;
  width: 100%;
  margin: 0 auto;
}

.portfolio-card {
  flex: 1 1 calc((100% - 80px) / 3);
  min-width: 0;
  max-width: calc((100% - 80px) / 3);
}

.portfolio-card[hidden] {
  display: none;
}

.portfolio-card__link {
  display: block;
  color: inherit;
  text-decoration: none;
}

.portfolio-card__figure {
  margin: 0;
}

.portfolio-card__image {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1;
  object-fit: cover;
  background: #d7d7d7;
  transition: transform .45s ease, filter .45s ease;
}

.portfolio-card__link:hover .portfolio-card__image,
.portfolio-card__link:focus-visible .portfolio-card__image {
  transform: scale(1.018);
  filter: brightness(.96);
}

.portfolio-card__caption {
  padding-top: 20px;
}

.portfolio-card__title {
  margin: 0;
  color: #4f4f4f;
  font-size: 23px;
  font-weight: 300;
  line-height: 1.12;
  text-transform: uppercase;
}

.portfolio-card__description {
  margin: 9px 0 0;
  color: #777;
  font-size: 15px;
  font-weight: 300;
  line-height: 1.3;
}

.portfolio-catalog__empty {
  margin: 0;
  padding: 60px 20px;
  font-size: 20px;
  text-align: center;
}

@media (max-width: 1120px) {
  .portfolio-catalog__filters {
    gap: 28px;
  }

  .portfolio-catalog__filter {
    font-size: 20px;
  }

  .portfolio-catalog__surface {
    padding-right: 5%;
    padding-left: 5%;
  }

  .portfolio-card {
    flex-basis: calc((100% - 32px) / 2);
    max-width: calc((100% - 32px) / 2);
  }

  .portfolio-catalog__list {
    gap: 48px 32px;
  }

}

@media (max-width: 767px) {
  .portfolio-catalog__surface {
    padding-right: 5%;
    padding-left: 5%;
  }

  .portfolio-catalog__list {
    flex-direction: column;
    gap: 39px;
  }

  .portfolio-card {
    flex-basis: auto;
    width: 100%;
    max-width: none;
  }
}

@media (max-width: 700px) {
  .portfolio-catalog__filter-menu {
    display: none;
  }

  .portfolio-intro__inner {
    align-items: flex-start;
    padding: 14px 15px 25px;
  }

  .portfolio-intro__title {
    position: static;
    width: auto;
    max-width: 330px;
    height: auto;
    padding: 0;
    margin: 0 0 18px;
    overflow: visible;
    clip: auto;
    white-space: normal;
    color: var(--portfolio-dark);
    font-size: 22px;
    font-weight: 700;
    line-height: 1.03;
    text-transform: uppercase;
  }

  .portfolio-intro__text {
    max-width: 330px;
    font-size: 18px;
    line-height: 1.45;
    text-align: left;
    white-space: pre-line;
  }

  .portfolio-catalog__filter-menu {
    padding: 20px 15px;
  }

  .portfolio-catalog__filters {
    display: flex;
    visibility: visible;
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    min-height: 0;
    max-height: none;
    margin: 0;
    padding: 0;
    gap: 13px 22px;
    opacity: 1;
  }

  .portfolio-catalog__filter {
    flex: 0 0 auto;
    width: auto;
    padding: 0 0 4px;
    border-bottom: 1px solid currentColor;
    font-size: 14px;
    line-height: 1.2;
    text-align: center;
  }

  .portfolio-catalog__filter:hover,
  .portfolio-catalog__filter:focus-visible {
    transform: none;
  }

  .portfolio-catalog__surface {
    min-height: 0;
    padding: 40px 15px 55px;
  }

  .portfolio-card {
    margin: 0;
  }

  .portfolio-card__caption {
    padding-top: 13px;
  }

  .portfolio-card__title {
    font-size: 20px;
  }

  .portfolio-card__description {
    margin-top: 6px;
    font-size: 14px;
  }

}

/* На страницах разделов панель категорий — это ссылки, а не кнопки:
   сбрасываем оформление ссылки, чтобы вид остался прежним. */
a.portfolio-catalog__filter {
  display: inline-block;
  text-decoration: none;
}