/* ============================================================
   portfolio.css — страница портфолио, фильтр, lightbox
   ============================================================ */

/* Фильтр по категориям */
.portfolio-filter {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin-bottom: 2.5rem;
}

.filter-btn {
  padding: .5rem 1.125rem;
  font-family: var(--ff-accent);
  font-size: .8125rem;
  font-weight: 600;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--c-ink-soft);
  background: transparent;
  border: 1px solid var(--c-line);
  border-radius: 100px;
  cursor: pointer;
  text-decoration: none;
  transition:
    background-color var(--t-fast),
    border-color var(--t-fast),
    color var(--t-fast);
  display: inline-flex;
  align-items: center;
  gap: .375rem;
}
.filter-btn:hover,
.filter-btn.is-active {
  background: var(--c-accent);
  border-color: var(--c-accent);
  color: #fff;
}
.filter-btn:focus-visible {
  outline: 2px solid var(--c-accent);
  outline-offset: 3px;
}

.filter-btn__count {
  font-family: var(--ff-mono);
  font-size: .6875rem;
  opacity: .7;
}

/* Расширенная bento-grid для страницы портфолио */
.portfolio-bento {
  display: grid;
  gap: 1rem;
  grid-template-columns: 1fr;
}
@media (min-width: 576px) {
  .portfolio-bento { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 992px) {
  .portfolio-bento {
    grid-template-columns: repeat(3, 1fr);
    grid-auto-rows: 280px;
  }
  .portfolio-bento .project-card:nth-child(4n+1) {
    grid-column: span 2;
  }
  .portfolio-bento .project-card:nth-child(7n+2) {
    grid-row: span 2;
  }
}

/* Детальная проекта — боковая панель */
.project-sidebar {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.project-sidebar-box {
  background: var(--c-surface);
  border-radius: var(--r-lg);
  border: 1px solid var(--c-line);
  padding: 1.5rem;
}

.project-sidebar-box__title {
  font-family: var(--ff-accent);
  font-size: .75rem;
  font-weight: 600;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--c-ink-mute);
  margin-bottom: 1rem;
}

.project-sidebar-box__tags {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
}

/* Lightbox */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: var(--z-lightbox);
  background: rgba(0,0,0,.95);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--t-base), visibility var(--t-base);
}
.lightbox.is-open {
  opacity: 1;
  visibility: visible;
}

.lightbox__img {
  max-width: 100%;
  max-height: 90vh;
  object-fit: contain;
  border-radius: var(--r-md);
  transition: opacity var(--t-fast);
}

.lightbox__close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(255,255,255,.1);
  border: 1px solid rgba(255,255,255,.2);
  color: #fff;
  font-size: 1.25rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color var(--t-fast);
}
.lightbox__close:hover { background: rgba(255,255,255,.2); }
.lightbox__close:focus-visible {
  outline: 2px solid #fff;
  outline-offset: 3px;
}

.lightbox__prev,
.lightbox__next {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(255,255,255,.1);
  border: 1px solid rgba(255,255,255,.2);
  color: #fff;
  font-size: 1.25rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color var(--t-fast);
}
.lightbox__prev { left: 1rem; }
.lightbox__next { right: 1rem; }
.lightbox__prev:hover,
.lightbox__next:hover { background: rgba(255,255,255,.22); }
.lightbox__prev:focus-visible,
.lightbox__next:focus-visible {
  outline: 2px solid #fff;
  outline-offset: 3px;
}

.lightbox__caption {
  position: absolute;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%);
  font-size: .875rem;
  color: rgba(255,255,255,.6);
  text-align: center;
  white-space: nowrap;
}

.lightbox__counter {
  font-family: var(--ff-mono);
  font-size: .8125rem;
}