/* ════════════════════════════════════════════════════════════
   filters.css — DermLab · панель фільтрів каталогу
   Підключається в index.html ПІСЛЯ style.css.
   Використовує змінні теми з style.css (--c-gold, --c-surface …).
   ════════════════════════════════════════════════════════════ */

/* ── Розкладка каталогу: фільтри зліва, сітка справа ─────── */
.catalog__layout {
  display: block;
}
body.has-filters .catalog__layout {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  gap: 32px;
  align-items: start;
}
.catalog__main { min-width: 0; }

/* Сітка: на 280px менше місця → 3 колонки замість 4 */
body.has-filters .catalog__layout .products-grid {
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

/* ── Панель ───────────────────────────────────────────────── */
.filters {
  position: sticky;
  top: 150px;
  max-height: calc(100vh - 170px);
  display: flex;
  flex-direction: column;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--r-lg);
  overflow: hidden;
}
body:not(.has-filters) .filters,
body:not(.has-filters) .filters-toggle { display: none; }

.filters__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 16px 20px 14px;
  border-bottom: 1px solid var(--c-border);
}
.filters__title {
  font-size: 15px;
  font-weight: 600;
  color: var(--c-text-primary);
}
.filters__reset {
  background: none;
  border: none;
  padding: 0;
  font-family: inherit;
  font-size: 12.5px;
  color: var(--c-gold);
  cursor: pointer;
}
.filters__reset:hover { color: var(--c-gold-dark); text-decoration: underline; }
.filters__reset[hidden] { display: none; }
.filters__close { display: none; }

.filters__scroll {
  flex: 1;
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: 4px 20px 12px;
  scrollbar-width: thin;
  scrollbar-color: var(--c-gold-deep) transparent;
}
.filters__foot { display: none; }

/* ── Швидкі перемикачі ────────────────────────────────────── */
.fquick {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 14px 0 16px;
  border-bottom: 1px solid var(--c-border);
}
.fquick__btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 7px 13px;
  font-family: inherit;
  font-size: 13px;
  color: var(--c-text-secondary);
  background: transparent;
  border: 1px solid var(--c-border-med);
  border-radius: 99px;
  cursor: pointer;
  transition: border-color var(--t-fast) var(--ease), color var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
}
.fquick__btn span { color: var(--c-text-muted); font-size: 12px; }
.fquick__btn:hover { border-color: var(--c-gold-mid); color: var(--c-text-primary); }
.fquick__btn.is-on {
  background: var(--c-gold-light);
  border-color: var(--c-gold);
  color: var(--c-gold-dark);
}

/* ── Група ────────────────────────────────────────────────── */
.fgroup { border-bottom: 1px solid var(--c-border); }
.fgroup:last-child { border-bottom: none; }
.fgroup__head {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 15px 0;
  background: none;
  border: none;
  font-family: inherit;
  font-size: 14px;
  font-weight: 600;
  text-align: left;
  color: var(--c-text-primary);
  cursor: pointer;
}
.fgroup__head svg {
  color: var(--c-text-muted);
  transition: transform var(--t-fast) var(--ease);
  flex-shrink: 0;
}
.fgroup.is-open .fgroup__head svg { transform: rotate(180deg); }
.fgroup__body { display: none; padding-bottom: 14px; }
.fgroup.is-open .fgroup__body { display: block; }

.fsearch {
  width: 100%;
  margin-bottom: 10px;
  padding: 9px 12px;
  font-family: inherit;
  font-size: 13px;
  color: var(--c-text-primary);
  background: var(--c-bg);
  border: 1px solid var(--c-border);
  border-radius: var(--r-md);
  outline: none;
  transition: border-color var(--t-fast) var(--ease), box-shadow var(--t-fast) var(--ease);
}
.fsearch::placeholder { color: var(--c-text-muted); }
.fsearch:focus { border-color: var(--c-gold); box-shadow: 0 0 0 3px var(--c-gold-light); }

/* ── Значення (чекбокси) ──────────────────────────────────── */
.fopts { list-style: none; margin: 0; padding: 0; }
.fopts__empty { padding: 6px 0; font-size: 13px; color: var(--c-text-muted); }
.fopt {
  position: relative;
  display: flex;
  align-items: center;
  gap: 11px;
  padding: 6px 0;
  cursor: pointer;
  font-size: 13.5px;
  color: var(--c-text-secondary);
}
.fopt input {
  position: absolute;
  opacity: 0;
  width: 18px; height: 18px;
  margin: 0;
  cursor: pointer;
}
.fopt__box {
  width: 18px; height: 18px;
  flex-shrink: 0;
  border: 1.5px solid var(--c-border-med);
  border-radius: 5px;
  background: var(--c-bg);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: background var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}
.fopt:hover .fopt__box { border-color: var(--c-gold-mid); }
.fopt input:checked + .fopt__box { background: var(--c-gold); border-color: var(--c-gold); }
.fopt input:checked + .fopt__box::after {
  content: '';
  width: 4px; height: 9px;
  border: solid var(--c-black);
  border-width: 0 2px 2px 0;
  transform: rotate(45deg) translate(-1px, -1px);
}
.fopt input:focus-visible + .fopt__box { outline: 2px solid var(--c-gold); outline-offset: 2px; }
.fopt input:checked ~ .fopt__name { color: var(--c-text-primary); }
.fopt__name { flex: 1; min-width: 0; line-height: 1.35; }
.fopt__count { font-size: 12px; color: var(--c-text-muted); font-variant-numeric: tabular-nums; }

.fmore {
  margin-top: 4px;
  padding: 6px 0;
  background: none;
  border: none;
  font-family: inherit;
  font-size: 13px;
  color: var(--c-gold);
  cursor: pointer;
}
.fmore:hover { color: var(--c-gold-dark); text-decoration: underline; }

/* ── Ціна ─────────────────────────────────────────────────── */
.fprice__row { display: flex; align-items: center; gap: 8px; }
.fprice__in {
  flex: 1;
  min-width: 0;
  padding: 9px 10px;
  font-family: inherit;
  font-size: 13.5px;
  color: var(--c-text-primary);
  background: var(--c-bg);
  border: 1px solid var(--c-border);
  border-radius: var(--r-md);
  outline: none;
  -moz-appearance: textfield;
  appearance: textfield;
}
.fprice__in::-webkit-outer-spin-button,
.fprice__in::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
.fprice__in:focus { border-color: var(--c-gold); box-shadow: 0 0 0 3px var(--c-gold-light); }
.fprice__dash { color: var(--c-text-muted); }
.fprice__ok {
  padding: 9px 14px;
  font-family: inherit;
  font-size: 13px;
  font-weight: 600;
  color: var(--c-black);
  background: var(--c-gold);
  border: none;
  border-radius: var(--r-md);
  cursor: pointer;
  transition: background var(--t-fast) var(--ease);
}
.fprice__ok:hover { background: var(--c-gold-dark); }

.fhist {
  height: 46px;
  margin-top: 16px;
  display: flex;
  align-items: flex-end;
  gap: 2px;
}
.fhist__bar {
  flex: 1;
  background: var(--c-gold);
  opacity: .55;
  border-radius: 2px 2px 0 0;
  transition: opacity var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
}
.fhist__bar.is-out { background: var(--c-border-med); opacity: .6; }

.frange {
  --l: 0%; --r: 100%;
  position: relative;
  height: 22px;
  margin: 0 9px;
}
.frange__track {
  position: absolute;
  left: 0; right: 0; top: 50%;
  height: 3px;
  margin-top: -1.5px;
  border-radius: 3px;
  background: var(--c-border-med);
}
.frange__track::after {
  content: '';
  position: absolute;
  top: 0; bottom: 0;
  left: var(--l);
  right: calc(100% - var(--r));
  background: var(--c-gold);
  border-radius: 3px;
}
.frange__in {
  position: absolute;
  left: -9px; right: -9px;
  width: calc(100% + 18px);
  top: 0; height: 22px;
  margin: 0;
  background: none;
  pointer-events: none;
  -webkit-appearance: none;
  appearance: none;
}
.frange__in::-webkit-slider-runnable-track { background: none; height: 22px; }
.frange__in::-moz-range-track { background: none; }
.frange__in::-webkit-slider-thumb {
  -webkit-appearance: none;
  pointer-events: auto;
  width: 18px; height: 18px;
  margin-top: 2px;
  border-radius: 50%;
  background: var(--c-surface);
  border: 2px solid var(--c-gold);
  cursor: grab;
  box-shadow: 0 1px 4px rgba(0,0,0,.5);
}
.frange__in::-moz-range-thumb {
  pointer-events: auto;
  width: 14px; height: 14px;
  border-radius: 50%;
  background: var(--c-surface);
  border: 2px solid var(--c-gold);
  cursor: grab;
}
.frange__in:focus-visible::-webkit-slider-thumb { outline: 2px solid var(--c-gold); outline-offset: 2px; }

/* ── Активні фільтри над сіткою ───────────────────────────── */
.filters-active {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 0 22px;
}
.filters-active[hidden] { display: none; }
.fchip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 8px 6px 13px;
  font-family: inherit;
  font-size: 13px;
  color: var(--c-gold-dark);
  background: var(--c-gold-light);
  border: 1px solid var(--c-gold-mid);
  border-radius: 99px;
  cursor: pointer;
  transition: border-color var(--t-fast) var(--ease);
}
.fchip span { font-size: 16px; line-height: 1; opacity: .75; }
.fchip:hover { border-color: var(--c-gold); }
.fchip:hover span { opacity: 1; }
.fchip-reset {
  padding: 6px 4px;
  background: none;
  border: none;
  font-family: inherit;
  font-size: 13px;
  color: var(--c-text-muted);
  cursor: pointer;
}
.fchip-reset:hover { color: var(--c-text-primary); text-decoration: underline; }

/* Порожній результат */
.catalog-empty {
  grid-column: 1 / -1;
  padding: 64px 0;
  text-align: center;
}
.catalog-empty__title { font-size: 16px; font-weight: 600; color: var(--c-text-primary); margin-bottom: 8px; }
.catalog-empty__text  { font-size: 14px; color: var(--c-text-muted); margin-bottom: 20px; }

/* Кнопка «Фільтри» — лише на вузьких екранах */
.filters-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  padding: 9px 16px;
  font-family: inherit;
  font-size: 13.5px;
  font-weight: 500;
  color: var(--c-text-primary);
  background: var(--c-surface);
  border: 1px solid var(--c-border-med);
  border-radius: var(--r-md);
  cursor: pointer;
}
.filters-toggle:hover { border-color: var(--c-gold-mid); }
.filters-toggle__badge {
  min-width: 20px; height: 20px;
  padding: 0 6px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 11.5px;
  font-weight: 700;
  color: var(--c-black);
  background: var(--c-gold);
  border-radius: 99px;
}
.filters-toggle__badge[hidden] { display: none; }
.filters-overlay { display: none; }

.catalog__tools { display: flex; align-items: center; gap: 14px; }

/* ── Адаптив ──────────────────────────────────────────────── */
@media (max-width: 1180px) {
  body.has-filters .catalog__layout { grid-template-columns: 250px minmax(0, 1fr); gap: 24px; }
  body.has-filters .catalog__layout .products-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }
}

@media (max-width: 900px) {
  body.has-filters .catalog__layout { display: block; }
  body.has-filters .catalog__layout .products-grid { grid-template-columns: repeat(3, 1fr); gap: 18px; }

  body.has-filters .filters-toggle { display: inline-flex; }

  .filters {
    position: fixed;
    z-index: 1200;
    top: 0; left: 0; bottom: 0;
    width: min(88vw, 360px);
    max-height: none;
    border-radius: 0 var(--r-lg) var(--r-lg) 0;
    transform: translateX(-102%);
    transition: transform 260ms var(--ease);
    box-shadow: var(--shadow-lg);
  }
  .filters.is-open { transform: none; }
  .filters__close {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 34px; height: 34px;
    font-size: 22px;
    line-height: 1;
    color: var(--c-text-secondary);
    background: none;
    border: 1px solid var(--c-border);
    border-radius: 50%;
    cursor: pointer;
  }
  .filters__foot {
    display: block;
    padding: 12px 20px calc(12px + env(safe-area-inset-bottom, 0px));
    border-top: 1px solid var(--c-border);
    background: var(--c-surface);
  }
  .filters__foot .btn { width: 100%; justify-content: center; padding: 13px; }

  .filters-overlay {
    display: block;
    position: fixed;
    inset: 0;
    z-index: 1100;
    background: rgba(0,0,0,.6);
    opacity: 0;
    pointer-events: none;
    transition: opacity 260ms var(--ease);
  }
  .filters-overlay.is-open { opacity: 1; pointer-events: auto; }
  body.filters-lock { overflow: hidden; }
}

@media (max-width: 768px) {
  body.has-filters .catalog__layout .products-grid { grid-template-columns: repeat(2, 1fr); gap: 14px; }
  .catalog__tools { width: 100%; justify-content: space-between; }
}

@media (max-width: 480px) {
  body.has-filters .catalog__layout .products-grid { gap: 10px; }
}

@media (prefers-reduced-motion: reduce) {
  .filters, .filters-overlay { transition: none; }
}