/* Avangard Engineering: портфолио, лайтбокс, инженерные объекты.
   Переменные объявлены в css/style.css (:root). */

/* ================= Фильтры ================= */
.pf-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0 0 32px;
}

.pf-filter {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  max-width: 100%;
  min-height: 44px;
  padding: 10px 18px;
  border: 1px solid var(--c-line);
  border-radius: 999px;
  text-align: left;
  background: var(--c-bg);
  color: var(--c-text);
  font: 600 15px/1.2 var(--font);
  cursor: pointer;
  transition: border-color .2s ease, background-color .2s ease, color .2s ease;
}

.pf-filter:hover { border-color: var(--c-ink); }

.pf-filter.is-active {
  background: var(--c-ink);
  border-color: var(--c-ink);
  color: #fff;
}

.pf-filter__count {
  flex: none;
  min-width: 22px;
  padding: 2px 7px;
  border-radius: 999px;
  background: var(--c-bg-alt);
  color: var(--c-muted);
  font-size: 12px;
  font-weight: 700;
  text-align: center;
}

.pf-filter.is-active .pf-filter__count {
  background: var(--c-red);
  color: #fff;
}

/* QA: на светлом фоне бирюзовый даёт 2,8:1 (меньше 3:1), поэтому фокус красный, как в style.css */
.pf-filter:focus-visible,
.eng-tab:focus-visible,
.pf-card__open:focus-visible::after {
  outline: 3px solid var(--c-red);
  outline-offset: 3px;
}

/* ================= Сетка ================= */
.pf-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}

.pf-card {
  position: relative;
  display: flex;
  flex-direction: column;
  min-width: 0;
  overflow: hidden;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background: var(--c-bg);
  cursor: pointer;
  transition: opacity .22s ease, transform .22s ease, box-shadow .3s ease, border-color .3s ease;
}

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

.pf-card.is-hiding {
  opacity: 0;
  transform: translateY(10px) scale(.98);
}

/* красная линия снизу при наведении */
.pf-card::before {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  z-index: 2;
  width: 100%;
  height: 3px;
  background: var(--c-red);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform .4s ease;
}

.pf-card:hover,
.pf-card:focus-within {
  border-color: transparent;
  box-shadow: var(--shadow);
}

.pf-card:hover::before,
.pf-card:focus-within::before { transform: scaleX(1); }

.pf-card__media {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--c-bg-alt);
}

.pf-card__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .7s cubic-bezier(.2, .7, .2, 1);
}

.pf-card:hover .pf-card__media img,
.pf-card:focus-within .pf-card__media img { transform: scale(1.05); }

.pf-card__badge {
  position: absolute;
  top: 14px;
  left: 14px;
  padding: 6px 12px;
  border-radius: 6px;
  background: var(--c-red);
  color: #fff;
  font: 700 12px/1 var(--font);
  letter-spacing: .04em;
  text-transform: uppercase;
}

.pf-card__count {
  position: absolute;
  right: 14px;
  bottom: 14px;
  padding: 5px 10px;
  border-radius: 6px;
  background: rgba(30, 30, 30, .72);
  color: #fff;
  font: 600 12px/1 var(--font);
}

.pf-card__body {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 20px 22px;
}

.pf-card__title {
  margin: 0;
  color: var(--c-ink);
  font: 700 19px/1.3 var(--font);
  /* длинные казахские и английские названия: перенос по слогам, в крайнем случае внутри слова */
  overflow-wrap: anywhere;
  -webkit-hyphens: auto;
  hyphens: auto;
}

.pf-card__open {
  padding: 0;
  border: 0;
  background: none;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
}

.pf-card__open:focus { outline: none; }

/* вся карточка кликабельна */
.pf-card__open::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 3;
  border-radius: var(--radius);
}

.pf-card__open:focus-visible::after { outline-offset: -3px; }

.pf-card__meta {
  margin: 0;
  overflow-wrap: anywhere;
  color: var(--c-muted);
  font-size: 14px;
}

.pf-card__status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 4px 0 0;
  color: var(--c-text);
  font-size: 13px;
  font-weight: 600;
  line-height: 1.35;
}

.pf-card__status::before {
  content: "";
  width: 8px;
  height: 8px;
  flex: none;
  border-radius: 50%;
  background: var(--c-cyan);
}

/* Первая видимая карточка (.pf-card--lead) становится широкой, если так ряды
   заполняются целиком. data-mod3 / data-mod2 ставит portfolio.js.
   3 колонки: остаток 0 → 2×2 (крупная), остаток 2 → на 2 колонки. */
.pf-grid[data-mod3="0"] .pf-card--lead { grid-column: span 2; grid-row: span 2; }
.pf-grid[data-mod3="2"] .pf-card--lead { grid-column: span 2; }

.pf-grid[data-mod3="0"] .pf-card--lead .pf-card__media {
  aspect-ratio: auto;
  flex: 1 1 auto;
  min-height: 320px;
}

.pf-grid[data-mod3="0"] .pf-card--lead .pf-card__title,
.pf-grid[data-mod3="2"] .pf-card--lead .pf-card__title { font-size: 22px; }

@media (max-width: 1100px) {
  .pf-grid { gap: 20px; }
}

/* 2 колонки: при нечётном числе первая карточка на всю ширину */
@media (max-width: 820px) {
  .pf-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }

  .pf-grid[data-mod3] .pf-card--lead { grid-column: auto; grid-row: auto; }
  .pf-grid[data-mod2="1"] .pf-card--lead { grid-column: 1 / -1; }

  .pf-grid[data-mod3] .pf-card--lead .pf-card__media {
    flex: none;
    min-height: 0;
    aspect-ratio: 16 / 10;
  }
  .pf-grid[data-mod2="1"] .pf-card--lead .pf-card__media { aspect-ratio: 16 / 8; }

  .pf-grid[data-mod3] .pf-card--lead .pf-card__title { font-size: 19px; }
  .pf-grid[data-mod2="1"] .pf-card--lead .pf-card__title { font-size: 21px; }
}

@media (max-width: 560px) {
  .pf-filters {
    flex-wrap: nowrap;
    overflow-x: auto;
    margin-bottom: 24px;
    padding-bottom: 4px;
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
  }
  .pf-filters::-webkit-scrollbar { display: none; }
  /* лента прокручивается, поэтому подписи не переносим */
  .pf-filter { flex: none; max-width: none; padding: 9px 14px; font-size: 14px; white-space: nowrap; }

  .pf-grid { grid-template-columns: 1fr; gap: 16px; }
  .pf-grid[data-mod2] .pf-card--lead { grid-column: auto; }
  .pf-grid[data-mod2] .pf-card--lead .pf-card__media { aspect-ratio: 16 / 10; }
  .pf-card__title,
  .pf-grid[data-mod2] .pf-card--lead .pf-card__title { font-size: 18px; }
}

/* ================= Лайтбокс ================= */
body.lb-open { overflow: hidden; }

.lb {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  opacity: 0;
  transition: opacity .2s ease;
}

.lb[hidden] { display: none; }
.lb.is-open { opacity: 1; }

.lb__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(14, 15, 16, .94);
}

.lb__dialog {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 340px;
  gap: 28px;
  width: 100%;
  max-width: 1480px;
  height: 100%;
  max-height: 920px;
  color: #fff;
  font-family: var(--font);
  transform: translateY(12px);
  transition: transform .25s ease;
}

.lb.is-open .lb__dialog { transform: none; }

.lb__main {
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-width: 0;
  min-height: 0;
}

.lb__stage {
  position: relative;
  flex: 1 1 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 0;
  touch-action: pan-y;
  user-select: none;
}

.lb__img {
  display: block;
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  border-radius: 6px;
  transition: opacity .25s ease;
}

.lb__stage.is-loading .lb__img { opacity: .35; }

.lb__loader {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 36px;
  height: 36px;
  margin: -18px 0 0 -18px;
  border: 3px solid rgba(255, 255, 255, .2);
  border-top-color: var(--c-red);
  border-radius: 50%;
  opacity: 0;
  pointer-events: none;
}

.lb__stage.is-loading .lb__loader {
  opacity: 1;
  animation: lb-spin .8s linear infinite;
}

@keyframes lb-spin { to { transform: rotate(360deg); } }

.lb__nav,
.lb__close {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(255, 255, 255, .18);
  border-radius: 50%;
  background: rgba(30, 30, 30, .7);
  color: #fff;
  cursor: pointer;
  transition: background-color .2s ease, border-color .2s ease;
}

.lb__nav:hover,
.lb__close:hover {
  background: var(--c-red);
  border-color: var(--c-red);
}

.lb__nav:focus-visible,
.lb__close:focus-visible,
.lb__thumb:focus-visible {
  outline: 3px solid var(--c-cyan);
  outline-offset: 2px;
}

.lb__nav {
  position: absolute;
  top: 50%;
  width: 52px;
  height: 52px;
  margin-top: -26px;
}

.lb__nav--prev { left: 12px; }
.lb__nav--next { right: 12px; }
.lb__nav[hidden],
.lb__strip[hidden],
.lb__badge[hidden] { display: none; }

.lb__close {
  position: absolute;
  top: 0;
  right: 0;
  z-index: 2;
  width: 46px;
  height: 46px;
}

.lb__bar {
  display: flex;
  align-items: center;
  gap: 16px;
  min-width: 0;
}

.lb__counter {
  flex: none;
  min-width: 56px;
  margin: 0;
  color: rgba(255, 255, 255, .75);
  font-size: 14px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

.lb__strip {
  display: flex;
  gap: 8px;
  min-width: 0;
  overflow-x: auto;
  padding: 3px;
  scrollbar-width: thin;
  scrollbar-color: rgba(255, 255, 255, .25) transparent;
}

.lb__thumb {
  flex: none;
  width: 88px;
  height: 58px;
  padding: 0;
  overflow: hidden;
  border: 2px solid transparent;
  border-radius: 6px;
  background: #222;
  opacity: .55;
  cursor: pointer;
  transition: opacity .2s ease, border-color .2s ease;
}

.lb__thumb img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.lb__thumb:hover { opacity: .9; }

.lb__thumb.is-active {
  border-color: var(--c-red);
  opacity: 1;
}

.lb__info {
  align-self: center;
  max-height: 100%;
  overflow-y: auto;
  padding: 56px 4px 8px 0;
}

.lb__badge {
  display: inline-block;
  margin-bottom: 14px;
  padding: 6px 12px;
  border-radius: 6px;
  background: var(--c-red);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .04em;
  text-transform: uppercase;
}

.lb__title {
  margin: 0 0 8px;
  color: #fff;
  font-size: 26px;
  font-weight: 800;
  line-height: 1.2;
  overflow-wrap: anywhere;
  -webkit-hyphens: auto;
  hyphens: auto;
}

.lb__meta {
  margin: 0 0 18px;
  color: var(--c-cyan);
  font-size: 14px;
  font-weight: 600;
}

.lb__summary {
  margin: 0 0 20px;
  color: rgba(255, 255, 255, .82);
  font-size: 15px;
  line-height: 1.6;
}

.lb__facts {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 18px 0 0;
  border-top: 1px solid rgba(255, 255, 255, .14);
  list-style: none;
}

.lb__facts li {
  position: relative;
  padding-left: 20px;
  color: rgba(255, 255, 255, .9);
  font-size: 14px;
  line-height: 1.45;
}

.lb__facts li::before {
  content: "";
  position: absolute;
  top: .55em;
  left: 0;
  width: 10px;
  height: 2px;
  background: var(--c-red);
}

@media (max-width: 1100px) {
  .lb__dialog { grid-template-columns: minmax(0, 1fr) 280px; gap: 20px; }
  .lb__title { font-size: 22px; }
}

@media (max-width: 820px) {
  .lb { padding: 0; align-items: stretch; }

  .lb__dialog {
    display: flex;
    flex-direction: column;
    gap: 0;
    max-height: none;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
  }

  .lb__main {
    flex: none;
    gap: 10px;
    padding: 64px 0 0;
  }

  .lb__stage {
    flex: none;
    height: 58vh;
    height: 58svh;
  }

  .lb__img { border-radius: 0; }

  .lb__bar { padding: 0 16px; }

  .lb__close { top: 10px; right: 12px; position: fixed; }

  .lb__nav { width: 44px; height: 44px; margin-top: -22px; }
  .lb__nav--prev { left: 8px; }
  .lb__nav--next { right: 8px; }

  .lb__info {
    align-self: stretch;
    max-height: none;
    overflow: visible;
    padding: 22px 16px 32px;
  }
}

@media (max-width: 560px) {
  .lb__stage { height: 46vh; height: 46svh; }
  .lb__thumb { width: 68px; height: 46px; }
  .lb__title { font-size: 20px; }
}

/* ================= Инженерные объекты ================= */
.eng-tabs {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0 0 28px;
  padding: 6px;
  border: 1px solid var(--c-line);
  border-radius: 999px;
  background: var(--c-bg-alt);
}

.eng-tab {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  padding: 10px 20px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--c-text);
  font: 700 15px/1.2 var(--font);
  cursor: pointer;
  transition: background-color .2s ease, color .2s ease, box-shadow .2s ease;
}

.eng-tab:hover { color: var(--c-ink); }

.eng-tab.is-active {
  background: var(--c-bg);
  color: var(--c-ink);
  box-shadow: 0 2px 10px rgba(0, 0, 0, .08);
}

.eng-tab__count {
  min-width: 24px;
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--c-line);
  color: var(--c-muted);
  font-size: 12px;
  text-align: center;
}

.eng-tab.is-active .eng-tab__count {
  background: var(--c-red);
  color: #fff;
}

.eng-panel[hidden] { display: none; }
.eng-panel:focus { outline: none; }
.eng-panel:focus-visible { outline: 3px solid var(--c-red); outline-offset: 6px; border-radius: var(--radius); }
.eng-panel + .eng-panel { margin-top: 40px; }
.eng-panel[role="tabpanel"] + .eng-panel { margin-top: 0; }

.eng-panel__title {
  margin: 0 0 16px;
  color: var(--c-ink);
  font: 700 20px/1.3 var(--font);
}

.eng-panel.is-entering .eng-card { animation: eng-in .35s ease both; }
.eng-panel.is-entering .eng-card:nth-child(2) { animation-delay: .03s; }
.eng-panel.is-entering .eng-card:nth-child(3) { animation-delay: .06s; }
.eng-panel.is-entering .eng-card:nth-child(4) { animation-delay: .09s; }
.eng-panel.is-entering .eng-card:nth-child(n+5) { animation-delay: .12s; }

@keyframes eng-in {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: none; }
}

.eng-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.eng-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-width: 0;
  padding: 24px 24px 22px 76px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background: var(--c-bg);
  transition: border-color .25s ease, box-shadow .25s ease;
}

.eng-card::before {
  content: "";
  position: absolute;
  top: 24px;
  bottom: 24px;
  left: 0;
  width: 3px;
  border-radius: 0 3px 3px 0;
  background: var(--c-line);
  transition: background-color .25s ease;
}

.eng-card:hover {
  border-color: transparent;
  box-shadow: var(--shadow);
}

.eng-card:hover::before { background: var(--c-red); }

.eng-card__num {
  position: absolute;
  top: 22px;
  left: 24px;
  color: var(--c-red);
  font: 800 18px/1.3 var(--font);
  font-variant-numeric: tabular-nums;
}

.eng-card__title {
  margin: 0;
  color: var(--c-ink);
  font: 700 17px/1.35 var(--font);
  overflow-wrap: anywhere;
}

.eng-card__params {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.eng-card__params li {
  padding: 5px 10px;
  border-radius: 6px;
  background: var(--c-bg-alt);
  color: var(--c-ink);
  font-size: 13px;
  font-weight: 600;
  line-height: 1.3;
}

.eng-card__details {
  display: grid;
  gap: 8px;
  margin: auto 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--c-line);
}

.eng-card__details > div {
  display: grid;
  grid-template-columns: 82px minmax(0, 1fr);
  gap: 12px;
}

.eng-card__details dt {
  color: var(--c-muted);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .04em;
  line-height: 1.6;
  text-transform: uppercase;
}

.eng-card__details dd {
  margin: 0;
  color: var(--c-text);
  font-size: 14px;
  line-height: 1.5;
}

@media (max-width: 820px) {
  .eng-list { grid-template-columns: 1fr; }
}

@media (max-width: 560px) {
  .eng-tabs { display: flex; border-radius: var(--radius); }
  .eng-tab { flex: 1 1 0; justify-content: center; padding: 10px 12px; border-radius: calc(var(--radius) - 4px); }
  .eng-card { padding: 20px 18px 18px; }
  .eng-card__num { position: static; font-size: 15px; }
  .eng-card__details > div { grid-template-columns: 1fr; gap: 2px; }
}

/* ================= Без анимаций ================= */
@media (prefers-reduced-motion: reduce) {
  .pf-card,
  .pf-card::before,
  .pf-card__media img,
  .lb,
  .lb__dialog,
  .lb__img,
  .eng-card { transition: none; }
  .pf-card:hover .pf-card__media img,
  .pf-card:focus-within .pf-card__media img { transform: none; }
  .eng-panel.is-entering .eng-card { animation: none; }
  .lb__stage.is-loading .lb__loader { animation: none; }
}