/* =============================================================
   .filter-drawer — bottom sheet mobile, sidebar desktop
   ============================================================= */
.filter-toggle {
  display: flex;
  width: 100%;
  align-items: center;
  justify-content: space-between;
  min-height: var(--touch-min);
  padding-inline: var(--space-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-md);
  font-weight: 600;
}

@media (min-width: 1024px) {
  .filter-toggle { display: none; }
}

.filter-drawer {
  position: fixed;
  inset: 0;
  z-index: var(--z-drawer);
  pointer-events: none;
  visibility: hidden;
}

.filter-drawer.is-open { pointer-events: auto; visibility: visible; }

.filter-drawer__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(17, 17, 17, 0.5);
  opacity: 0;
  transition: opacity var(--duration-base) var(--ease-out);
}
.filter-drawer.is-open .filter-drawer__backdrop { opacity: 1; }

.filter-drawer__panel {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  max-height: 85vh;
  background: var(--color-surface);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  padding: var(--space-lg);
  padding-bottom: calc(var(--space-lg) + var(--safe-bottom));
  transform: translateY(100%);
  transition: transform var(--duration-base) var(--ease-out);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

@media (max-width: 1023px) {
  /* page-main isolation:isolate → без цього bottom-nav (z:200) над drawer */
  .page-wrapper:has(.filter-drawer.is-open) .page-main {
    position: relative;
    z-index: calc(var(--z-drawer) + 1);
  }

  .filter-drawer__panel {
    max-height: calc(100dvh - var(--safe-top) - 0.75rem);
    padding-bottom: calc(var(--space-lg) + var(--safe-bottom));
  }
}

.filter-drawer.is-open .filter-drawer__panel { transform: translateY(0); }

@media (min-width: 1024px) {
  .filter-drawer {
    position: static;
    inset: auto;
    pointer-events: auto;
    visibility: visible;
    z-index: auto;
  }
  .filter-drawer__backdrop { display: none; }
  .filter-drawer__panel {
    position: sticky;
    top: calc(var(--header-height) + var(--space-lg));
    max-height: none;
    transform: none;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    width: 280px;
  }
  .filter-drawer__close { display: none; }
}

.filter-drawer__handle {
  width: 40px;
  height: 4px;
  background: var(--color-border);
  border-radius: 2px;
  margin: 0 auto;
}

.filter-drawer__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.filter-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid var(--color-border);
}
.filter-group:last-of-type { border-bottom: none; padding-bottom: 0; }

.filter-group__title { font-weight: 700; font-size: var(--font-size-sm); }

.filter-checkbox {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  min-height: var(--touch-min);
  font-size: var(--font-size-sm);
  cursor: pointer;
}

/* Кастомний чекбокс: appearance:none (base.css) прибирає нативний вигляд —
   без явних border/checked-стану чекбокс стає невидимим, особливо в темній темі. */
.filter-checkbox input[type="checkbox"] {
  appearance: none;
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  border: 1.5px solid var(--color-border);
  border-radius: 4px;
  background-color: var(--color-bg);
  background-repeat: no-repeat;
  background-position: center;
  background-size: 11px 11px;
  cursor: pointer;
  transition: background-color var(--duration-fast) var(--ease-out),
              border-color var(--duration-fast) var(--ease-out);
}

.filter-checkbox input[type="checkbox"]:hover {
  border-color: var(--color-text);
}

.filter-checkbox input[type="checkbox"]:focus-visible {
  outline: 2px solid var(--color-text);
  outline-offset: 2px;
}

.filter-checkbox input[type="checkbox"]:checked {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='none' stroke='%23f7f6f3' stroke-width='2.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M3 8.5l3 3 7-7'/%3E%3C/svg%3E");
}

/* Темна тема: --color-accent стає світлим — тік має бути темним, щоб лишатись видимим. */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .filter-checkbox input[type="checkbox"]:checked {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='none' stroke='%23111111' stroke-width='2.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M3 8.5l3 3 7-7'/%3E%3C/svg%3E");
  }
}
:root[data-theme="dark"] .filter-checkbox input[type="checkbox"]:checked {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='none' stroke='%23111111' stroke-width='2.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M3 8.5l3 3 7-7'/%3E%3C/svg%3E");
}

.filter-category-tree,
.filter-category-tree__children {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs, 4px);
  list-style: none;
  margin: 0;
  padding: 0;
}

.filter-category-tree__item + .filter-category-tree__item {
  margin-top: var(--space-xs, 4px);
}

.filter-category-tree__children {
  padding-left: var(--space-lg);
  border-left: 1px solid var(--color-border);
  margin-left: 9px;
}

.filter-checkbox--child {
  font-size: var(--font-size-xs, 0.8125rem);
  color: var(--color-text-muted);
}

.filter-price-row { display: flex; align-items: center; gap: var(--space-sm); }
.filter-price-row input {
  width: 100%;
  min-height: var(--touch-min);
  padding-inline: var(--space-sm);
  border: 1px solid var(--color-border);
}

.filter-drawer__footer {
  margin-top: auto;
  display: flex;
  gap: var(--space-sm);
  position: sticky;
  bottom: 0;
  z-index: 1;
  padding-top: var(--space-md);
  padding-bottom: max(var(--space-sm), var(--safe-bottom));
  margin-inline: calc(-1 * var(--space-lg));
  padding-inline: var(--space-lg);
  background: linear-gradient(
    180deg,
    color-mix(in srgb, var(--color-surface) 0%, transparent) 0%,
    var(--color-surface) 28%
  );
}

@media (min-width: 1024px) {
  .filter-drawer__footer {
    position: static;
    margin-inline: 0;
    padding-inline: 0;
    padding-top: 0;
    padding-bottom: 0;
    background: none;
  }
}

/* --- Premium catalog page --- */
.catalog-page .filter-toggle {
  color: var(--catalog-text);
  background: var(--gradient-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--catalog-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--elevation-soft);
}

.catalog-page .filter-drawer__panel {
  background: var(--gradient-glass);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border: 1px solid var(--catalog-border);
  box-shadow: var(--elevation-lift), var(--elevation-inset);
  color: var(--catalog-text);
}

@media (min-width: 1024px) {
  .catalog-page .filter-drawer__panel {
    border-radius: var(--radius-xl);
    width: 280px;
  }
}

.catalog-page .filter-drawer__head h3 {
  font-weight: var(--font-weight-display);
  font-size: var(--font-size-base);
  letter-spacing: 0.02em;
}

.catalog-page .filter-group {
  border-bottom-color: var(--catalog-border);
}

.catalog-page .filter-group__title {
  color: var(--catalog-text-muted);
  font-weight: 500;
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.14em;
}

.catalog-page .filter-checkbox {
  color: var(--catalog-text);
}

.catalog-page .filter-checkbox--child {
  color: var(--catalog-text-muted);
}

.catalog-page .filter-checkbox input[type="checkbox"] {
  border-color: var(--catalog-border);
  background-color: var(--color-bg);
}

.catalog-page .filter-checkbox input[type="checkbox"]:hover {
  border-color: var(--border-glow);
}

.catalog-page .filter-drawer__footer .btn--primary {
  border-radius: var(--radius-md);
  box-shadow: var(--elevation-soft);
}

.catalog-page .filter-drawer__footer .btn--primary:hover {
  box-shadow: var(--elevation-lift);
}

.catalog-page .filter-checkbox input[type="checkbox"]:checked {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='none' stroke='%23f7f6f3' stroke-width='2.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M3 8.5l3 3 7-7'/%3E%3C/svg%3E");
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .catalog-page .filter-checkbox input[type="checkbox"]:checked {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='none' stroke='%23111111' stroke-width='2.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M3 8.5l3 3 7-7'/%3E%3C/svg%3E");
  }
}

:root[data-theme="dark"] .catalog-page .filter-checkbox input[type="checkbox"]:checked {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='none' stroke='%23111111' stroke-width='2.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M3 8.5l3 3 7-7'/%3E%3C/svg%3E");
}

.catalog-page .filter-category-tree__children {
  border-left-color: var(--catalog-border);
}

.catalog-page .filter-price-row input {
  border: 1px solid var(--catalog-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg);
  color: var(--catalog-text);
}

.catalog-page .filter-price-row input::placeholder {
  color: var(--catalog-text-muted);
}

.catalog-page .filter-drawer__footer .btn--ghost {
  border-color: var(--catalog-border);
  color: var(--catalog-text);
  background: transparent;
}

@media (max-width: 1023px) {
  .catalog-page .filter-drawer__footer {
    background: linear-gradient(
      180deg,
      transparent 0%,
      color-mix(in srgb, var(--color-bg) 92%, transparent) 32%,
      var(--color-bg) 100%
    );
  }
}

.catalog-page .badge--dark {
  background: var(--color-accent);
  color: var(--color-text-inverse);
  border-radius: 999px;
}