/* =========================================================================
   KeepSeal Neo — product filters. Layouts: sidebar | horizontal | accordion.
   Panels: plain | card | boxed | stamp. Light & dark.
   ========================================================================= */
.ksn-filters { --f-accent: var(--ksn-primary); --f-accent-rgb: var(--ksn-primary-rgb); width: 100%; margin: 0; }

/* ---- panel styles ---- */
.ksn-filters--panel-card {
	background: var(--ksn-surface); border: 1px solid var(--ksn-line);
	border-radius: calc(var(--ksn-radius) + 8px); box-shadow: var(--ksn-shadow);
	padding: 20px;
}
.ksn-filters--panel-stamp {
	background: var(--ksn-surface); border-top: 3px solid var(--ksn-heat);
	padding: 20px;
	clip-path: polygon(0 0, 100% 0, 100% calc(100% - 24px), calc(100% - 24px) 100%, 0 100%);
}

/* ---- active chips ---- */
.ksn-filters__active { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 16px; }
.ksn-filters__chip {
	display: inline-flex; align-items: center; gap: 7px;
	padding: 6px 12px; border: none; border-radius: 999px; cursor: pointer;
	background: rgba(var(--f-accent-rgb), .1); color: var(--f-accent);
	font-family: var(--ksn-font); font-weight: 700; font-size: 0.8rem;
	transition: background .15s ease, color .15s ease;
}
.ksn-filters__chip i { font-style: normal; font-size: 1.05rem; line-height: 1; opacity: .75; }
.ksn-filters__chip:hover { background: var(--ksn-accent); color: #fff; }

/* ---- list / layout ---- */
.ksn-filters__list { display: flex; flex-direction: column; gap: 6px; }
.ksn-filters--horizontal .ksn-filters__list { flex-direction: row; flex-wrap: wrap; align-items: flex-start; gap: 16px; }
.ksn-filters--horizontal .ksn-filter { flex: 1 1 180px; min-width: 160px; }

/* ---- a filter group ---- */
.ksn-filter { padding: 14px 0; border-bottom: 1px solid var(--ksn-line); }
.ksn-filter:last-child { border-bottom: none; }
.ksn-filters--panel-boxed .ksn-filter {
	border: 1px solid var(--ksn-line); border-radius: 16px; padding: 14px 16px; margin-bottom: 10px; background: var(--ksn-surface);
}
.ksn-filters--horizontal .ksn-filter { border-bottom: none; padding: 0; }

.ksn-filter__head { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin-bottom: 12px; }
.ksn-filter__title { font-weight: 800; font-size: 0.95rem; color: var(--ksn-ink); }
.ksn-filter__toggle { width: 28px; height: 28px; display: grid; place-items: center; border: none; background: transparent; color: var(--ksn-muted); cursor: pointer; }
.ksn-filter__toggle svg { transition: transform .25s ease; }
.ksn-filter.is-collapsed .ksn-filter__toggle svg { transform: rotate(-90deg); }
.ksn-filter__body { overflow: hidden; max-height: 1200px; transition: max-height .3s ease, opacity .2s ease; }
.ksn-filter.is-collapsed .ksn-filter__body { max-height: 0; opacity: 0; }

/* ---- checkbox / list options ---- */
.ksn-filter__opts { display: grid; gap: 4px; max-height: 280px; overflow: auto; }
.ksn-fopt {
	position: relative; display: flex; align-items: center; gap: 10px;
	padding: 6px 4px; cursor: pointer; font-size: 0.92rem; color: var(--ksn-ink);
	border-radius: 8px; transition: background .15s ease;
}
.ksn-fopt:hover { background: var(--ksn-surface-2); }
.ksn-fopt input { position: absolute; opacity: 0; width: 1px; height: 1px; pointer-events: none; }
.ksn-fopt__box { flex: none; width: 20px; height: 20px; border: 2px solid var(--ksn-line); border-radius: 6px; position: relative; transition: background .15s ease, border-color .15s ease; }
.ksn-fopt.is-on .ksn-fopt__box { background: var(--f-accent); border-color: var(--f-accent); }
.ksn-fopt.is-on .ksn-fopt__box::after { content: ""; position: absolute; left: 6px; top: 2px; width: 5px; height: 10px; border: solid #fff; border-width: 0 2px 2px 0; transform: rotate(45deg); }
.ksn-fopt__label { flex: 1; min-width: 0; }
.ksn-fopt__count { flex: none; font-size: 0.76rem; color: var(--ksn-muted); background: var(--ksn-surface-2); padding: 2px 8px; border-radius: 999px; }

/* buttons style */
.ksn-filter--buttons .ksn-filter__opts { display: flex; flex-wrap: wrap; gap: 8px; max-height: none; }
.ksn-filter--buttons .ksn-fopt { padding: 8px 14px; border: 1px solid var(--ksn-line); border-radius: 999px; background: var(--ksn-surface-2); }
.ksn-filter--buttons .ksn-fopt:hover { border-color: rgba(var(--f-accent-rgb), .5); background: var(--ksn-surface-2); }
.ksn-filter--buttons .ksn-fopt__box { display: none; }
.ksn-filter--buttons .ksn-fopt.is-on { background: var(--f-accent); color: #fff; border-color: transparent; }
.ksn-filter--buttons .ksn-fopt.is-on .ksn-fopt__count { background: rgba(255,255,255,.22); color: #fff; }

/* color swatches */
.ksn-filter--color .ksn-filter__opts { display: flex; flex-wrap: wrap; gap: 12px; max-height: none; }
.ksn-filter--color .ksn-fopt { flex-direction: column; gap: 5px; padding: 0; background: transparent; }
.ksn-filter--color .ksn-fopt:hover { background: transparent; }
.ksn-filter--color .ksn-fopt__box { display: none; }
.ksn-filter--color .ksn-fopt__swatch { width: 32px; height: 32px; border-radius: 50%; border: 2px solid var(--ksn-line); background: var(--ksn-surface-2); transition: box-shadow .15s ease; }
.ksn-filter--color .ksn-fopt.is-on .ksn-fopt__swatch { box-shadow: 0 0 0 2px var(--f-accent); border-color: var(--ksn-surface); }
.ksn-filter--color .ksn-fopt__label { font-size: 0.72rem; color: var(--ksn-muted); }
.ksn-filter--color .ksn-fopt__count { display: none; }

/* dropdown */
.ksn-filter__select {
	width: 100%; height: 44px; padding: 0 12px;
	border: 1px solid var(--ksn-line); border-radius: 12px;
	background: var(--ksn-surface-2); color: var(--ksn-ink);
	font-family: var(--ksn-font); font-weight: 600;
}

/* price */
.ksn-fprice { display: flex; align-items: center; gap: 10px; }
.ksn-fprice input {
	flex: 1; min-width: 0; height: 44px; padding: 0 12px;
	border: 1px solid var(--ksn-line); border-radius: 12px;
	background: var(--ksn-surface-2); color: var(--ksn-ink);
	font-family: var(--ksn-font); font-weight: 700; text-align: center;
}
.ksn-fprice__sep { color: var(--ksn-muted); }

/* switch (stock / on-sale) */
.ksn-fswitch { display: inline-flex; align-items: center; gap: 10px; cursor: pointer; font-size: 0.92rem; color: var(--ksn-ink); font-weight: 600; }
.ksn-fswitch input { position: absolute; opacity: 0; }
.ksn-fswitch__track { width: 42px; height: 24px; border-radius: 999px; background: var(--ksn-line); position: relative; transition: background .2s ease; flex: none; }
.ksn-fswitch__track::after { content: ""; position: absolute; top: 3px; inset-inline-end: 3px; width: 18px; height: 18px; border-radius: 50%; background: #fff; transition: transform .2s ease; }
.ksn-fswitch input:checked + .ksn-fswitch__track { background: var(--f-accent); }
.ksn-fswitch input:checked + .ksn-fswitch__track::after { transform: translateX(-18px); }

/* rating */
.ksn-frating { display: grid; gap: 4px; }
.ksn-frating__opt { display: flex; align-items: center; gap: 8px; cursor: pointer; padding: 5px 6px; border-radius: 8px; }
.ksn-frating__opt:hover { background: var(--ksn-surface-2); }
.ksn-frating__opt input { position: absolute; opacity: 0; }
.ksn-frating__stars { color: var(--ksn-heat); letter-spacing: 2px; font-size: 1rem; }
.ksn-frating__plus { font-size: 0.8rem; color: var(--ksn-muted); }
.ksn-frating__opt input:checked ~ .ksn-frating__plus { color: var(--f-accent); font-weight: 800; }

/* search */
.ksn-fsearch { position: relative; display: flex; align-items: center; }
.ksn-fsearch svg { position: absolute; inset-inline-start: 12px; color: var(--ksn-muted); pointer-events: none; }
.ksn-fsearch input {
	width: 100%; height: 46px; padding: 0 42px;
	border: 1px solid var(--ksn-line); border-radius: 12px;
	background: var(--ksn-surface-2); color: var(--ksn-ink);
	font-family: var(--ksn-font); font-size: 0.95rem;
}
.ksn-fsearch input:focus { outline: 2px solid rgba(var(--f-accent-rgb), .4); border-color: transparent; }

/* foot buttons */
.ksn-filters__foot { display: flex; gap: 10px; margin-top: 16px; }
.ksn-filters__apply {
	flex: 1; height: 48px; border: none; border-radius: 13px; cursor: pointer;
	background: var(--f-accent); color: #fff; font-family: var(--ksn-font); font-weight: 800; font-size: 0.95rem;
	transition: transform .18s ease, box-shadow .18s ease;
}
.ksn-filters__apply:hover { transform: translateY(-2px); box-shadow: 0 14px 28px -12px rgba(var(--f-accent-rgb), .6); }
.ksn-filters__clear {
	height: 48px; padding: 0 18px; border: 1px solid var(--ksn-line); border-radius: 13px; cursor: pointer;
	background: transparent; color: var(--ksn-muted); font-family: var(--ksn-font); font-weight: 700; font-size: 0.88rem;
	transition: border-color .18s ease, color .18s ease;
}
.ksn-filters__clear:hover { border-color: var(--ksn-accent); color: var(--ksn-accent); }
.ksn-filters--horizontal .ksn-filters__foot { margin-top: 12px; }

/* clickable collapse header (whole title row) */
.ksn-filter__head { cursor: pointer; user-select: none; }
.ksn-filter__head:hover .ksn-filter__title { color: var(--f-accent); }

/* per-filter option search — appears for long lists like size */
.ksn-fopt-search { position: relative; display: flex; align-items: center; margin-bottom: 10px; }
.ksn-fopt-search svg { position: absolute; inset-inline-start: 11px; color: var(--ksn-muted); pointer-events: none; }
.ksn-fopt-search input {
	width: 100%; height: 40px; padding: 0 34px;
	border: 1px solid var(--ksn-line); border-radius: 10px;
	background: var(--ksn-surface-2); color: var(--ksn-ink);
	font-family: var(--ksn-font); font-size: 0.88rem;
}
.ksn-fopt-search input:focus { outline: 2px solid rgba(var(--f-accent-rgb), .4); border-color: transparent; }

/* facet: an option with zero results under the current selection */
.ksn-fopt.is-empty { opacity: .4; }
.ksn-fopt.is-empty .ksn-fopt__count { background: transparent; }
.ksn-filter--buttons .ksn-fopt.is-empty { filter: grayscale(1); }

/* dark tweaks */
.ksn-dark .ksn-fopt__box,
html.ksn-dark .ksn-filters.ksn-dark .ksn-fopt__box { border-color: rgba(255,255,255,.2); }
.ksn-dark .ksn-fswitch__track { background: rgba(255,255,255,.16); }

/* =========================================================================
   Mobile: turn the filter panel into an off-canvas drawer / bottom sheet
   ========================================================================= */
.ksn-filters-shell { width: 100%; }
.ksn-filters__open,
.ksn-filters__drawerhead,
.ksn-filters__done,
.ksn-filters__scrim { display: none; }

@media (max-width: 768px) {
	/* trigger button (replaces the inline panel) */
	.ksn-filters-shell--drawer .ksn-filters__open,
	.ksn-filters-shell--sheet .ksn-filters__open {
		display: inline-flex; align-items: center; justify-content: center; gap: 9px; width: 100%;
		padding: 13px 18px; border: 1px solid var(--ksn-line); border-radius: 13px; cursor: pointer;
		background: var(--ksn-surface); color: var(--ksn-ink); font-family: var(--ksn-font); font-weight: 800; font-size: 0.95rem;
	}
	.ksn-filters__open-count { display: inline-flex; align-items: center; justify-content: center; min-width: 20px; height: 20px; padding: 0 6px; border-radius: 999px; background: var(--ksn-heat); color: #fff; font-size: 0.72rem; font-weight: 800; }

	/* the panel becomes a fixed drawer */
	.ksn-filters-shell--drawer .ksn-filters,
	.ksn-filters-shell--sheet .ksn-filters {
		position: fixed; z-index: 99980; margin: 0; padding: 0; max-width: none; clip-path: none !important;
		display: flex; flex-direction: column; background: var(--ksn-surface); color: var(--ksn-ink); border: none;
		box-shadow: 0 -12px 44px -14px rgba(0,0,0,.45);
		transition: transform .32s cubic-bezier(.16,1,.3,1);
	}
	.ksn-filters-shell--drawer .ksn-filters { top: 0; bottom: 0; right: 0; left: auto; width: min(88vw, 360px); transform: translateX(100%); }
	.ksn-filters-shell--drawer.is-open .ksn-filters { transform: translateX(0); }
	.ksn-filters-shell--sheet .ksn-filters { left: 0; right: 0; bottom: 0; width: 100%; max-height: 86vh; border-radius: 22px 22px 0 0; transform: translateY(100%); }
	.ksn-filters-shell--sheet.is-open .ksn-filters { transform: translateY(0); }

	.ksn-filters-shell--drawer .ksn-filters__scrim,
	.ksn-filters-shell--sheet .ksn-filters__scrim { display: block; position: fixed; inset: 0; z-index: 99978; background: rgba(8,12,20,.5); opacity: 0; pointer-events: none; transition: opacity .28s ease; }
	.ksn-filters-shell--drawer.is-open .ksn-filters__scrim,
	.ksn-filters-shell--sheet.is-open .ksn-filters__scrim { opacity: 1; pointer-events: auto; }

	.ksn-filters__drawerhead { display: flex; align-items: center; justify-content: space-between; flex: none; padding: 16px 18px; border-bottom: 1px solid var(--ksn-line); }
	.ksn-filters__drawertitle { font-weight: 900; font-size: 1.05rem; color: var(--ksn-ink); }
	.ksn-filters__close { width: 40px; height: 40px; display: grid; place-items: center; border: none; background: var(--ksn-surface-2); color: var(--ksn-ink); border-radius: 10px; cursor: pointer; }

	.ksn-filters__scroll { flex: 1 1 auto; overflow-y: auto; padding: 16px 18px; -webkit-overflow-scrolling: touch; }

	.ksn-filters__foot { flex: none; display: flex; gap: 10px; margin: 0; padding: 14px 18px; border-top: 1px solid var(--ksn-line); background: var(--ksn-surface); }
	.ksn-filters__done { display: block; flex: 1; padding: 13px; border: none; border-radius: 13px; cursor: pointer; background: linear-gradient(120deg, var(--ksn-primary), var(--ksn-accent)); color: #fff; font-family: var(--ksn-font); font-weight: 800; font-size: 0.95rem; }

	/* horizontal layout collapses to a column inside the drawer */
	.ksn-filters-shell--drawer .ksn-filters--horizontal .ksn-filters__list,
	.ksn-filters-shell--sheet .ksn-filters--horizontal .ksn-filters__list { flex-direction: column; }
}

@media (min-width: 769px) {
	.ksn-filters__open, .ksn-filters__scrim, .ksn-filters__drawerhead, .ksn-filters__done { display: none !important; }
}