/**
 * MerchFuse Phase 11 — Filters, Collections and Catalog Navigation.
 * Progressive enhancement only; the underlying form and links work without JS.
 */
:root{--mf-catnav-border:rgba(17,17,17,.14);--mf-catnav-soft:#f7f5f0;--mf-catnav-shadow:0 18px 60px rgba(0,0,0,.16)}
.mf-catalog-shell{position:relative}
.mf-shop-layout--with-sidebar{display:grid;grid-template-columns:minmax(250px,292px) minmax(0,1fr);gap:clamp(24px,3vw,44px);align-items:start}
.mf-shop-sidebar{position:sticky;top:calc(var(--mf-header-height,72px) + 18px);max-height:calc(100vh - var(--mf-header-height,72px) - 36px);overflow:auto;border:1px solid var(--mf-catnav-border);background:#fff;border-radius:10px;scrollbar-width:thin;z-index:15}
.mf-filter-panel__head{display:flex;justify-content:space-between;align-items:flex-start;gap:16px;padding:20px 20px 16px;border-bottom:1px solid var(--mf-catnav-border);background:#fff;position:sticky;top:0;z-index:2}
.mf-filter-panel__head h2{font-size:18px;line-height:1.2;margin:0 0 5px}.mf-filter-panel__head p{font-size:12px;line-height:1.45;color:var(--mf-color-muted,#666);margin:0}.mf-sidebar-close{display:none}
.mf-catalog-filter-form{padding:0 20px 20px}.mf-filter-group{border:0;border-bottom:1px solid var(--mf-catnav-border);padding:18px 0;margin:0;min-width:0}.mf-filter-group legend{display:flex;align-items:center;justify-content:space-between;width:100%;font-size:13px;font-weight:700;letter-spacing:.02em;padding:0;margin:0 0 12px}.mf-filter-group__selected{display:inline-flex;min-width:22px;height:22px;align-items:center;justify-content:center;border-radius:999px;background:var(--mf-catnav-soft);font-size:11px;color:#444}.mf-filter-search{display:block;margin-bottom:10px}.mf-filter-search input{width:100%;height:40px;border:1px solid var(--mf-catnav-border);border-radius:6px;padding:0 12px;font-size:13px}.mf-filter-options{display:grid;gap:3px;max-height:255px;overflow:auto;padding-right:3px}.mf-filter-option{display:grid;grid-template-columns:20px minmax(0,1fr) auto;gap:9px;align-items:center;min-height:38px;padding:5px 4px;border-radius:5px;font-size:13px;cursor:pointer}.mf-filter-option:hover{background:var(--mf-catnav-soft)}.mf-filter-option input{width:18px;height:18px;margin:0;accent-color:#111}.mf-filter-option small{font-size:11px;color:var(--mf-color-muted,#777)}.mf-filter-option.is-disabled{opacity:.42;cursor:not-allowed}.mf-filter-option[hidden]{display:none}.mf-filter-group--toggles .mf-filter-option{grid-template-columns:20px minmax(0,1fr)}
.mf-price-filter{display:grid;grid-template-columns:1fr 1fr;gap:10px}.mf-price-filter label span{display:block;font-size:11px;color:var(--mf-color-muted,#666);margin-bottom:5px}.mf-price-filter input{width:100%;height:42px;border:1px solid var(--mf-catnav-border);border-radius:6px;padding:0 10px}
.mf-filter-actions{display:grid;grid-template-columns:1fr 1fr;gap:9px;padding-top:18px}.mf-filter-actions .mf-btn{min-height:44px;justify-content:center}.mf-filter-panel__widgets{padding:0 20px 20px;border-top:1px solid var(--mf-catnav-border)}
.mf-filter-chips{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin:0 0 20px}.mf-filter-chips__label{font-size:12px;font-weight:700}.mf-filter-chip,.mf-filter-clear{display:inline-flex;align-items:center;gap:7px;min-height:34px;padding:6px 10px;border:1px solid var(--mf-catnav-border);border-radius:999px;background:#fff;color:inherit;text-decoration:none;font-size:12px}.mf-filter-chip:hover,.mf-filter-chip:focus-visible{border-color:#111}.mf-filter-clear{border:0;text-decoration:underline;padding-inline:5px}.mf-filter-toggle__count{display:inline-flex;width:8px;height:8px;border-radius:999px;background:currentColor;overflow:hidden;color:transparent;vertical-align:middle}
.mf-catalog-results{position:relative}.mf-catalog-shell.is-loading .mf-catalog-results{opacity:.55;pointer-events:none}.mf-catalog-shell.is-loading:after{content:"";position:fixed;left:50%;top:50%;width:36px;height:36px;margin:-18px;border:3px solid rgba(0,0,0,.16);border-top-color:#111;border-radius:50%;animation:mf-catnav-spin .7s linear infinite;z-index:1100}@keyframes mf-catnav-spin{to{transform:rotate(360deg)}}
.mf-catalog-discovery{margin:clamp(36px,6vw,72px) 0 10px;padding:clamp(24px,4vw,42px);background:var(--mf-catnav-soft);border-radius:10px;display:grid;grid-template-columns:minmax(0,1fr) minmax(280px,1fr);gap:28px;align-items:center}.mf-catalog-discovery__eyebrow{font-size:11px;text-transform:uppercase;letter-spacing:.15em;font-weight:700;margin:0 0 8px}.mf-catalog-discovery h2{font-size:clamp(24px,3vw,38px);line-height:1.08;margin:0 0 12px}.mf-catalog-discovery p{max-width:62ch}.mf-catalog-discovery__links{display:grid;grid-template-columns:1fr 1fr;gap:10px}.mf-catalog-discovery__link{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:58px;padding:14px 16px;background:#fff;border:1px solid var(--mf-catnav-border);border-radius:7px;color:inherit;text-decoration:none;font-size:13px;font-weight:650}.mf-catalog-discovery__link:hover,.mf-catalog-discovery__link:focus-visible{border-color:#111;transform:translateY(-1px)}
.mf-filter-backdrop{display:none}
@media(max-width:1024px){
 .mf-shop-layout--with-sidebar{display:block}.mf-shop-sidebar{position:fixed;inset:0 auto 0 0;width:min(92vw,390px);max-height:none;border:0;border-radius:0;box-shadow:var(--mf-catnav-shadow);transform:translateX(-105%);transition:transform .24s ease;z-index:1002}.mf-shop-sidebar.is-open{transform:translateX(0)}.mf-sidebar-close{display:inline-flex}.mf-filter-backdrop{display:block;position:fixed;inset:0;background:rgba(0,0,0,.48);z-index:1001;opacity:0;transition:opacity .2s ease}.mf-filter-backdrop:not([hidden]){opacity:1}.mf-filter-panel__head{padding-top:max(20px,env(safe-area-inset-top))}.mf-catalog-filter-form{padding-bottom:max(24px,env(safe-area-inset-bottom))}.mf-filter-actions{position:sticky;bottom:0;background:#fff;padding:14px 0 max(14px,env(safe-area-inset-bottom));border-top:1px solid var(--mf-catnav-border);z-index:3}.mf-filter-panel__widgets{display:none}.mf-catalog-discovery{grid-template-columns:1fr}.mf-catalog-discovery__links{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media(max-width:600px){.mf-catalog-discovery__links{grid-template-columns:1fr}.mf-filter-chips{margin-bottom:14px}.mf-filter-chip{max-width:100%}.mf-filter-chip span:first-child{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.mf-shop-toolbar{gap:10px;align-items:center}.mf-shop-toolbar__left{flex-wrap:wrap}.mf-price-filter{grid-template-columns:1fr 1fr}}
@media(prefers-reduced-motion:reduce){.mf-shop-sidebar,.mf-filter-backdrop,.mf-catalog-discovery__link{transition:none!important}.mf-catalog-shell.is-loading:after{animation-duration:1.4s}}