.filter-overlay{
  will-change: backdrop-filter;
  overflow-y: auto;
  position: fixed;
  overscroll-behavior: contain;
  inset: 0;
  display: none;
  z-index: 1000;
  background:
    radial-gradient(circle at top left, rgba(0,198,194,0.10), transparent 30%),
    radial-gradient(circle at top right, rgba(12,99,231,0.14), transparent 34%),
    rgba(8,18,38,0.56);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  padding: 24px;
  box-sizing: border-box;
}

.filter-panel{
  display: flex;
  flex-direction: column;
  position: relative;
  width: min(1400px, 100%);
  height: 100%;
  max-height: 100%;
  margin: 0 auto;
  border-radius: 34px;
  overflow: hidden;
  background: linear-gradient(180deg, rgba(255,255,255,0.98) 0%, rgba(244,248,255,0.98) 100%);
  box-shadow:
    0 30px 80px rgba(4,20,53,0.28),
    0 8px 30px rgba(12,99,231,0.10);
  border: 1px solid rgba(255,255,255,0.55);
}

.filter-panel::before{
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at 15% 15%, rgba(0,198,194,0.08), transparent 24%),
    radial-gradient(circle at 85% 10%, rgba(12,99,231,0.10), transparent 28%);
}

.filter-panel-inner{
  -webkit-overflow-scrolling: touch;
  position: relative;
  z-index: 1;
  height: 100%;
  overflow-y: auto;
  padding: 56px 42px 42px;
  scroll-behavior: smooth;
}

.filter-panel-inner::-webkit-scrollbar{
  width: 10px;
}

.filter-panel-inner::-webkit-scrollbar-track{
  background: rgba(222,232,248,0.58);
  border-radius: 999px;
}

.filter-panel-inner::-webkit-scrollbar-thumb{
  background: linear-gradient(180deg, rgba(12,99,231,0.35), rgba(0,198,194,0.35));
  border-radius: 999px;
}

.filter-close{
  position: absolute;
  top: 18px;
  right: 18px;
  z-index: 7;
  width: 52px;
  height: 52px;
  border: none;
  border-radius: 18px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 30px;
  line-height: 1;
  color: var(--deep);
  background: rgba(255,255,255,0.90);
  box-shadow:
    0 12px 28px rgba(12,99,231,0.14),
    inset 0 1px 0 rgba(255,255,255,0.8);
  transition: transform .22s ease, box-shadow .22s ease, background .22s ease;
}

.filter-close:hover{
  transform: translateY(-2px) scale(1.03);
  background: #ffffff;
}

.filter-close.is-disabled,
.root-category-card.is-disabled,
.filter-step-item.is-disabled,
.filter-back-btn.is-disabled{
  opacity: .55;
  cursor: not-allowed;
  pointer-events: none;
}

.filter-header{
  max-width: 900px;
  margin: 0 auto 42px;
  text-align: center;
}

.filter-header-badge{
  width: 78px;
  height: 78px;
  margin: 0 auto 18px;
  border-radius: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  color: #fff;
  background: linear-gradient(135deg, var(--deep), var(--blue), var(--aqua));
  box-shadow: 0 20px 45px rgba(12,99,231,0.24);
}

.filter-panel h2{
  margin: 0 0 14px;
  font-size: clamp(28px, 3vw, 42px);
  line-height: 1.15;
  font-weight: 900;
  letter-spacing: -0.8px;
  color: var(--deep);
}

.filter-intro{
  max-width: 760px;
  margin: 0 auto;
}

.filter-intro p{
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
  color: #557094;
}

/* root tree */

.filter-root-categories{
  max-width: 1240px;
  margin: 0 auto;
  opacity: 1;
  transform: translateX(0);
  transition: opacity .28s ease, transform .28s ease;
}

.filter-root-categories.is-hidden{
  display: none;
}

.filter-block-title{
  margin: 0 0 24px;
  text-align: center;
  font-size: clamp(20px, 2vw, 28px);
  font-weight: 850;
  letter-spacing: -0.4px;
  color: var(--deep);
}

.root-category-grid{
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}

.root-category-card{
  position: relative;
  width: 100%;
  min-height: 180px;
  border: none;
  border-radius: 30px;
  padding: 26px 24px;
  display: flex;
  align-items: center;
  gap: 18px;
  text-align: left;
  cursor: pointer;
  overflow: hidden;
  isolation: isolate;
  background: linear-gradient(145deg, rgba(255,255,255,0.98), rgba(244,248,255,0.96));
  box-shadow:
    0 18px 44px rgba(12,41,95,0.10),
    inset 0 1px 0 rgba(255,255,255,0.95);
  transition: transform .28s ease, box-shadow .28s ease, background .28s ease;
}

.root-category-card::before{
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1.2px;
  background: linear-gradient(135deg, rgba(12,99,231,0.18), rgba(0,198,194,0.20), rgba(12,99,231,0.08));
  -webkit-mask:
    linear-gradient(#fff 0 0) content-box,
    linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
}

.root-category-card::after{
  content: "";
  position: absolute;
  width: 180px;
  height: 180px;
  right: -70px;
  top: -70px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(12,99,231,0.12), transparent 70%);
  z-index: -1;
  transition: transform .35s ease;
}

.root-category-card:hover{
  transform: translateY(-8px);
  box-shadow:
    0 28px 60px rgba(12,41,95,0.16),
    0 10px 24px rgba(0,198,194,0.08);
}

.root-category-card:hover::after{
  transform: scale(1.12);
}

.root-category-icon{
  flex: 0 0 78px;
  width: 78px;
  height: 78px;
  border-radius: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 30px;
  color: #fff;
  background: linear-gradient(135deg, var(--deep), var(--blue), var(--aqua));
  box-shadow: 0 18px 34px rgba(12,99,231,0.24);
}

.root-category-content{
  flex: 1 1 auto;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.root-category-name{
  display: block;
  font-size: clamp(21px, 1.8vw, 26px);
  line-height: 1.22;
  font-weight: 900;
  letter-spacing: -0.4px;
  color: var(--deep);
  word-break: break-word;
}

.root-category-description{
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  font-size: 14px;
  line-height: 1.7;
  color: #5b7397;
  max-width: 34ch;
}

.root-category-arrow{
  flex: 0 0 auto;
  width: 42px;
  height: 42px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--blue);
  background: rgba(12,99,231,0.08);
  transition: transform .25s ease, background .25s ease, color .25s ease;
}

.root-category-card:hover .root-category-arrow{
  transform: translateX(4px);
}

/* wizard */

.filter-levels-wizard{
  max-width: 1240px;
  margin: 0 auto;
  overflow: hidden;
  min-height: 300px;
  display: none;
  opacity: 0;
  transform: translateX(24px);
  transition: opacity .28s ease, transform .28s ease;
}

.filter-levels-wizard.is-visible{
  display: block;
  opacity: 1;
  transform: translateX(0);
}

.filter-levels-track{
  display: flex;
  width: 100%;
  transition: transform .34s ease;
  will-change: transform;
}

.filter-step{
  min-width: 100%;
  max-width: 100%;
  flex: 0 0 100%;
  box-sizing: border-box;
}

.filter-step-card{
  background: #ffffff;
  border: 1px solid rgba(12,99,231,0.10);
  border-radius: 24px;
  padding: 20px;
  box-shadow: 0 10px 25px rgba(12,41,95,0.06);
}

.filter-step-top{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 18px;
}

.filter-step-top-left{
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.filter-back-btn{
  border: none;
  background: #eef4ff;
  color: var(--deep);
  height: 42px;
  padding: 0 16px;
  border-radius: 12px;
  font-size: 14px;
  font-weight: 800;
  cursor: pointer;
  transition: all .2s ease;
}

.filter-back-btn:hover{
  background: #dfeaff;
}

.filter-step-title{
  margin: 0;
  font-size: 20px;
  font-weight: 800;
  color: var(--deep);
}

.filter-step-path{
  font-size: 13px;
  color: #5b7397;
}

.filter-step-grid{
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.filter-step-item{
  border: none;
  border-radius: 16px;
  padding: 14px;
  min-height: 78px;
  text-align: left;
  cursor: pointer;
  background: #f7faff;
  color: var(--deep);
  font-size: 15px;
  font-weight: 700;
  transition: all .2s ease;
  box-shadow: inset 0 0 0 1px rgba(12,99,231,0.08);
}

.filter-step-item:hover{
  transform: translateY(-2px);
  background: #eef4ff;
}

.filter-step-item.is-all{
  background: #eefcfb;
  box-shadow: inset 0 0 0 1px rgba(0,198,194,0.14);
}

/* full filters mode */

.filters-container{
  max-width: 1180px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.filters-section{
  position: relative;
  background: rgba(255,255,255,0.88);
  border: 1px solid rgba(12,99,231,0.10);
  border-radius: 24px;
  box-shadow:
    0 14px 34px rgba(12,41,95,0.07),
    inset 0 1px 0 rgba(255,255,255,0.88);
  overflow: hidden;
}

.filters-section::before{
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(255,255,255,0.22), transparent 38%);
}

.filters-section-head{
  position: relative;
  z-index: 1;
  padding: 18px 22px 0;
}

.filters-section-head h3{
  margin: 0;
  font-size: 19px;
  font-weight: 900;
  letter-spacing: -0.3px;
  color: var(--deep);
}

.filters-section-summary{
  padding: 0 22px 16px;
  font-size: 13.5px;
  color: #6480a3;
  line-height: 1.6;
}

.filters-section-body{
  position: relative;
  z-index: 1;
  padding: 0 22px 22px;
}

.filters-section-toggle{
  width: 100%;
  border: none;
  background: transparent;
  padding: 18px 22px 10px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  cursor: pointer;
  text-align: left;
  color: var(--deep);
  font-size: 19px;
  font-weight: 900;
  letter-spacing: -0.3px;
}

.filters-section-toggle i{
  transition: transform .22s ease;
}

.filters-section-toggle.is-collapsed i{
  transform: rotate(-180deg);
}

.filters-section-body:not(.is-open){
  display: none;
}

/* selected filters */

.filters-selected-bar{
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding: 4px 2px 2px;
}

.selected-filter-chip{
  border: none;
  background: linear-gradient(135deg, rgba(12,99,231,0.08), rgba(0,198,194,0.08));
  color: var(--deep);
  border-radius: 999px;
  padding: 10px 14px;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 13.5px;
  font-weight: 700;
  cursor: pointer;
  box-shadow:
    inset 0 0 0 1px rgba(12,99,231,0.10),
    0 8px 20px rgba(12,99,231,0.06);
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}

.selected-filter-chip:hover{
  transform: translateY(-1px);
  box-shadow:
    inset 0 0 0 1px rgba(12,99,231,0.16),
    0 12px 22px rgba(12,99,231,0.09);
}

.selected-filter-chip i{
  font-size: 12px;
  opacity: .8;
}

.selected-filter-chip--category{
  background: linear-gradient(135deg, rgba(8,35,91,0.10), rgba(12,99,231,0.12));
}

.filters-selected-empty{
  padding: 12px 14px;
  border-radius: 18px;
  background: rgba(248,251,255,0.95);
  color: #6f87a7;
  font-size: 14px;
  border: 1px dashed rgba(12,99,231,0.14);
}

/* category chain */

.category-filter-chain{
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 14px;
}

.category-filter-level{
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.category-filter-label{
  font-size: 13px;
  font-weight: 800;
  color: #667f9f;
}

.category-filter-select{
  width: 100%;
  min-height: 46px;
  border: 1px solid rgba(12,99,231,0.14);
  border-radius: 14px;
  padding: 0 14px;
  background: #fff;
  color: var(--deep);
  font-size: 14px;
  font-weight: 700;
  outline: none;
  transition: border-color .2s ease, box-shadow .2s ease;
}

.category-filter-select:focus{
  border-color: rgba(12,99,231,0.30);
  box-shadow: 0 0 0 4px rgba(12,99,231,0.08);
}

/* generic fields */

.filter-field-block{
  margin-bottom: 18px;
}

.filter-field-block:last-child{
  margin-bottom: 0;
}

.filter-label{
  display: block;
  margin-bottom: 8px;
  font-size: 14px;
  font-weight: 900;
  color: var(--deep);
}

.filter-subtitle{
  margin-bottom: 8px;
  font-size: 12.5px;
  line-height: 1.55;
  color: #7087a5;
}

.filter-help-text{
  margin-top: 8px;
  font-size: 12.5px;
  line-height: 1.55;
  color: #7087a5;
}

.filters-empty-state{
  padding: 14px 16px;
  border-radius: 16px;
  background: rgba(248,251,255,0.95);
  color: #6f87a7;
  font-size: 14px;
  border: 1px dashed rgba(12,99,231,0.14);
}

/* inputs */

.price-range-inputs{
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.filter-range-input{
  width: 100%;
  min-height: 46px;
  border: 1px solid rgba(12,99,231,0.14);
  border-radius: 14px;
  padding: 0 14px;
  background: #fff;
  color: var(--deep);
  font-size: 14px;
  font-weight: 700;
  outline: none;
  box-sizing: border-box;
  transition: border-color .2s ease, box-shadow .2s ease, background .2s ease;
}

.filter-range-input::placeholder{
  color: #8ba0bb;
  font-weight: 600;
}

.filter-range-input:focus{
  border-color: rgba(12,99,231,0.30);
  box-shadow: 0 0 0 4px rgba(12,99,231,0.08);
  background: #ffffff;
}

/* chips / buttons */

.filter-chip-grid{
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.filter-chip-btn{
  border: 1px solid rgba(12,99,231,0.12);
  background: #fff;
  color: var(--deep);
  border-radius: 999px;
  padding: 10px 14px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 800;
  line-height: 1.2;
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease, background .18s ease, color .18s ease;
  box-shadow: 0 8px 18px rgba(12,99,231,0.04);
}

.filter-chip-btn:hover{
  transform: translateY(-1px);
  border-color: rgba(12,99,231,0.24);
  box-shadow: 0 12px 20px rgba(12,99,231,0.08);
}

.filter-chip-btn.is-selected{
  color: #fff;
  background: linear-gradient(135deg, var(--deep), var(--blue));
  border-color: transparent;
  box-shadow: 0 14px 28px rgba(12,99,231,0.20);
}

.filter-chip-btn.is-inactive,
.filter-chip-btn:disabled{
  opacity: .42;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

/* checkbox list */

.filter-values-scroll{
  max-height: 176px;
  overflow-y: auto;
  padding-right: 4px;
}

.filter-values-scroll::-webkit-scrollbar{
  width: 8px;
}

.filter-values-scroll::-webkit-scrollbar-track{
  background: rgba(232,239,250,0.7);
  border-radius: 999px;
}

.filter-values-scroll::-webkit-scrollbar-thumb{
  background: rgba(12,99,231,0.24);
  border-radius: 999px;
}

.filter-checkbox-list{
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.filter-checkbox-item{
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 42px;
  padding: 10px 12px;
  border-radius: 14px;
  background: rgba(248,251,255,0.95);
  border: 1px solid rgba(12,99,231,0.08);
  color: var(--deep);
  font-size: 13.5px;
  font-weight: 700;
  transition: background .18s ease, border-color .18s ease, opacity .18s ease;
}

.filter-checkbox-item:hover{
  background: #f3f8ff;
  border-color: rgba(12,99,231,0.14);
}

.filter-checkbox-item input{
  width: 16px;
  height: 16px;
  accent-color: var(--blue);
  flex: 0 0 auto;
}

.filter-checkbox-item.is-inactive{
  opacity: .48;
}

/* actions */

.filters-actions{
  position: sticky;
  bottom: 0;
  z-index: 6;
  display: flex;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
  padding: 16px 0 4px;
  margin-top: 4px;
  background: linear-gradient(180deg, rgba(244,248,255,0) 0%, rgba(244,248,255,0.92) 24%, rgba(244,248,255,0.98) 100%);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}

.filters-reset-btn,
.filters-apply-btn{
  min-height: 50px;
  border: none;
  border-radius: 16px;
  padding: 0 20px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 900;
  transition: transform .18s ease, box-shadow .18s ease, opacity .18s ease;
}

.filters-reset-btn{
  background: #eef4ff;
  color: var(--deep);
  box-shadow: inset 0 0 0 1px rgba(12,99,231,0.08);
}

.filters-apply-btn{
  flex: 1 1 auto;
  color: #fff;
  background: linear-gradient(135deg, var(--deep), var(--blue), var(--aqua));
  box-shadow: 0 18px 34px rgba(12,99,231,0.22);
}

.filters-reset-btn:hover,
.filters-apply-btn:hover{
  transform: translateY(-1px);
}

.filters-reset-btn:disabled,
.filters-apply-btn:disabled{
  opacity: .55;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

/* spacing helpers */

.static-filters-body{
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.filters-block{
  display: block;
}

/* responsive */

@media (max-width: 1200px){
  .filter-overlay{
    padding: 18px;
  }

  .filter-panel-inner{
    padding: 50px 28px 30px;
  }

  .root-category-grid{
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .filter-step-grid{
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .filters-container{
    max-width: 100%;
  }
}

@media (max-width: 768px){
  .filter-overlay{
    padding: 10px;
  }

  .filter-panel{
    border-radius: 24px;
  }

  .filter-panel-inner{
    padding: 48px 18px 22px;
  }

  .filter-close{
    top: 12px;
    right: 12px;
    width: 46px;
    height: 46px;
    font-size: 26px;
    border-radius: 14px;
  }

  .filter-header{
    margin-bottom: 30px;
  }

  .filter-header-badge{
    width: 66px;
    height: 66px;
    border-radius: 20px;
    font-size: 24px;
    margin-bottom: 14px;
  }

  .filter-intro p{
    font-size: 14px;
    line-height: 1.75;
  }

  .filter-block-title{
    margin-bottom: 18px;
  }

  .root-category-grid,
  .filter-step-grid,
  .price-range-inputs,
  .category-filter-chain{
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .root-category-card{
    min-height: 140px;
    padding: 20px 18px;
    gap: 14px;
    border-radius: 24px;
  }

  .root-category-icon{
    width: 62px;
    height: 62px;
    flex-basis: 62px;
    border-radius: 18px;
    font-size: 24px;
  }

  .root-category-arrow{
    width: 38px;
    height: 38px;
    border-radius: 12px;
  }

  .root-category-description{
    font-size: 13px;
    max-width: 100%;
  }

  .filters-section-toggle{
    font-size: 17px;
    padding: 16px 18px 8px;
  }

  .filters-section-head{
    padding: 16px 18px 0;
  }

  .filters-section-summary{
    padding: 0 18px 14px;
  }

  .filters-section-body{
    padding: 0 18px 18px;
  }

  .filter-chip-grid{
    gap: 8px;
  }

  .filter-chip-btn,
  .selected-filter-chip{
    font-size: 12.5px;
    padding: 9px 12px;
  }

  .filters-actions{
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
  }

  .filters-reset-btn,
  .filters-apply-btn{
    width: 100%;
  }
}

@media (max-width: 480px){
  .filter-overlay{
    padding: 0;
  }

  .filter-panel{
    width: 100%;
    height: 100%;
    border-radius: 0;
  }

  .filter-panel-inner{
    padding: 52px 14px 18px;
  }

  .filter-panel h2{
    font-size: 25px;
  }

  .filter-block-title{
    font-size: 19px;
  }

  .root-category-card{
    min-height: 128px;
    padding: 16px 14px;
    gap: 12px;
  }

  .root-category-name{
    font-size: 19px;
  }

  .root-category-description{
    font-size: 12.5px;
    line-height: 1.6;
  }

  .filters-section{
    border-radius: 20px;
  }

  .filters-section-toggle,
  .filters-section-head h3{
    font-size: 16px;
  }

  .filter-label{
    font-size: 13px;
  }

  .filter-range-input,
  .category-filter-select{
    min-height: 44px;
    font-size: 13px;
  }
}