:root{color:#181818;--primary-red:#b2322e;--primary-dark:#181818;--white:#fff;--off-white:#f4f4f4;--app-bg:#faf9f9;--text-muted:#777;--border-light:#ebebeb;--shadow-sm:0 2px 6px #0000000a;--shadow-md:0 6px 16px #00000014;--shadow-lg:0 16px 48px #0000001f;background:#faf9f9;font-family:DM Sans,Avenir Next,-apple-system,BlinkMacSystemFont,sans-serif}*{box-sizing:border-box}body{background:var(--app-bg);min-width:320px;min-height:100vh;margin:0}button,input,select,textarea{font:inherit}button{cursor:pointer;border:0}.app-shell{background:var(--app-bg);width:min(430px,100%);min-height:100vh;margin:0 auto;padding:0 0 84px}.app-header{z-index:100;border-bottom:1px solid var(--border-light);background:var(--white);justify-content:space-between;align-items:center;padding:18px 20px 14px;display:flex;position:sticky;top:0}.header-title{min-width:0;color:var(--primary-dark);align-items:center;font-size:1.3rem;font-weight:900;display:flex}.header-logo{object-fit:contain;width:42px;height:42px;display:block}.app-svg-icon{fill:currentColor;width:22px;height:22px;display:block}.header-title span,.message,.see-all{color:var(--primary-red)}.icon-btn,.detail-nav-btn{border:1px solid var(--border-light);width:38px;height:38px;color:var(--primary-dark);background:var(--off-white);border-radius:999px;place-items:center;font-size:1rem;font-weight:900;display:grid}.header-icon-btn,.clear-btn{min-height:34px;color:var(--primary-red);background:var(--off-white);border-radius:7px;place-items:center;padding:0 10px;font-size:.72rem;font-weight:900;display:grid}.header-icon-btn{border-radius:999px;width:38px;height:38px;padding:0}.header-search-form{grid-template-columns:minmax(0,1fr) 38px;gap:8px;width:100%;display:grid}.header-search-form input{border:1px solid var(--border-light);background:var(--white);border-radius:8px;outline:0;min-width:0;padding:10px 12px;font-size:.82rem}.header-search-form button{color:var(--primary-red);background:var(--off-white);border-radius:8px;place-items:center;padding:0;font-size:.72rem;font-weight:900;display:grid}.close-icon-btn .app-svg-icon{width:19px;height:19px}.message{margin:10px 20px 0;font-size:.82rem;font-weight:700}.splash-screen{min-height:100vh;color:var(--white);background:var(--primary-dark);align-content:center;place-items:center;gap:18px;padding:40px;display:grid}.splash-logo-img{object-fit:contain;width:112px;height:112px}.splash-sub{color:#cfcfcf;letter-spacing:.14em;margin:0;font-size:.72rem;font-weight:900}.splash-loader-bar{background:#ffffff29;border-radius:999px;width:180px;height:4px;overflow:hidden}.splash-progress{border-radius:inherit;background:var(--primary-red);width:74%;height:100%;animation:1.4s ease-in-out forwards splash-progress;display:block}@keyframes splash-progress{0%{width:0}to{width:100%}}.hero-card{color:var(--white);background:var(--primary-dark);box-shadow:var(--shadow-md);border-radius:18px;margin:20px 20px 24px;padding:24px;position:relative;overflow:hidden}.hero-tag,.prod-sku,.cart-item-sku,.detail-sku{color:var(--primary-red);letter-spacing:.04em;text-transform:uppercase;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.65rem;font-weight:800}.hero-card h2{z-index:1;max-width:260px;margin:8px 0 10px;font-size:1.42rem;font-weight:900;line-height:1.22;position:relative}.hero-card p{z-index:1;color:#aaa;max-width:220px;margin:0;font-size:.82rem;line-height:1.45;position:relative}.hero-bg-img{object-fit:cover;opacity:.42;filter:grayscale(35%);width:170px;height:170px;position:absolute;bottom:-22px;right:-22px}.search-bar{border:1px solid var(--border-light);background:var(--white);box-shadow:var(--shadow-sm);border-radius:12px;grid-template-columns:minmax(0,1fr) auto;gap:8px;margin:0 20px 24px;padding:6px;display:grid}.search-bar input{min-width:0;color:var(--primary-dark);background:0 0;border:0;outline:0;padding:12px;font-size:.86rem}.search-bar button,.filter-form button,.btn-primary{color:var(--white);background:var(--primary-red);border-radius:8px;font-weight:900}.search-bar button{padding:0 14px}.section{margin:0 0 24px}.section-title{justify-content:space-between;align-items:center;gap:12px;margin-bottom:14px;padding:0 20px;display:flex}.section-title h2{color:var(--primary-dark);margin:0;font-size:1.05rem;font-weight:900}.section-title span,.section-title button,.prod-spec,.category-row-card em,.prod-actions span,.detail-desc,.status-card p{color:var(--text-muted)}.see-all{background:0 0;font-size:.78rem;font-weight:900}.category-tabs{scrollbar-width:none;gap:12px;padding:0 20px;display:flex;overflow-x:auto}.category-tabs::-webkit-scrollbar{display:none}.category-tabs button{white-space:nowrap;border:1px solid var(--border-light);color:var(--text-muted);background:var(--white);border-radius:999px;padding:10px 18px;font-size:.82rem;font-weight:900}.category-tabs .active{color:var(--white);border-color:var(--primary-dark);background:var(--primary-dark)}.series-list,.cart-list,.rfq-form,.filter-form,.profile-screen,.tools-grid{gap:14px;display:grid}.series-list{padding:0 20px}.category-row-card{border:1px solid var(--border-light);width:100%;color:var(--primary-dark);background:var(--white);box-shadow:var(--shadow-sm);text-align:left;border-radius:12px;justify-content:space-between;align-items:center;gap:16px;padding:16px;display:flex}.category-row-card.compact{padding:12px 14px}.categories-screen{padding:20px 0 100px}.category-subtitle{margin-top:22px}.cat-row-left{align-items:center;gap:14px;min-width:0;display:flex}.cat-row-icon{width:46px;height:46px;color:var(--primary-red);background:#b2322e0d;border-radius:8px;flex:0 0 46px;place-items:center;font-weight:900;display:grid;overflow:hidden}.cat-row-icon img{object-fit:cover;filter:grayscale(30%);width:100%;height:100%}.cat-row-info{gap:3px;min-width:0;display:grid}.cat-row-info strong{text-overflow:ellipsis;white-space:nowrap;overflow:hidden}.cat-row-info em{text-overflow:ellipsis;white-space:nowrap;font-size:.74rem;font-style:normal;overflow:hidden}.row-arrow{color:var(--primary-red);font-weight:900}.prod-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;padding:0 20px;display:grid}.prod-card{border:1px solid var(--border-light);background:var(--white);min-width:0;box-shadow:var(--shadow-sm);border-radius:12px;flex-direction:column;padding:14px;display:flex}.prod-card-main{color:inherit;text-align:left;display:contents}.prod-card-img{aspect-ratio:1.15;background:var(--off-white);border-radius:8px;width:100%;margin-bottom:12px;overflow:hidden}.prod-card-img img,.cart-item-img img{object-fit:cover;filter:grayscale(35%);width:100%;height:100%}.prod-card strong{min-height:2.5em;color:var(--primary-dark);-webkit-line-clamp:2;-webkit-box-orient:vertical;font-size:.88rem;line-height:1.28;display:-webkit-box;overflow:hidden}.prod-spec{-webkit-line-clamp:2;-webkit-box-orient:vertical;min-height:2.5em;margin-top:8px;font-size:.72rem;line-height:1.35;display:-webkit-box;overflow:hidden}.prod-actions{justify-content:space-between;align-items:center;gap:8px;margin-top:12px;display:flex}.prod-actions span{text-overflow:ellipsis;white-space:nowrap;font-size:.7rem;overflow:hidden}.add-cart-btn{width:32px;height:32px;color:var(--white);background:var(--primary-red);border-radius:999px;flex:0 0 32px;place-items:center;font-size:1.1rem;font-weight:900;display:grid}.filter-strip{border-bottom:1px solid var(--border-light);background:var(--white);justify-content:space-between;align-items:center;gap:12px;padding:10px 20px;display:flex}.filter-count{color:var(--text-muted);font-size:.8rem;font-weight:700}.filter-open-btn{color:var(--primary-red);background:0 0;font-size:.8rem;font-weight:900}.products-screen{padding-bottom:100px}.products-toolbar{justify-content:space-between;align-items:center;gap:12px;padding:12px 20px 18px;display:flex}.products-toolbar span{color:var(--text-muted);font-size:.78rem;font-weight:800}.products-toolbar button{color:var(--primary-dark);background:var(--white);box-shadow:var(--shadow-sm);border-radius:999px;align-items:center;gap:7px;padding:9px 13px;font-size:.78rem;font-weight:900;display:inline-flex}.products-toolbar .app-svg-icon{width:16px;height:16px}.drawer-scrim{z-index:180;background:#00000052;display:none;position:fixed;inset:0}.drawer-scrim.open{display:block}.filter-drawer{z-index:190;border-left:1px solid var(--border-light);background:var(--white);width:min(360px,88vw);box-shadow:var(--shadow-lg);transition:transform .18s;position:fixed;top:0;bottom:0;right:max(0px,50vw - 215px);overflow-y:auto;transform:translate(105%)}.filter-drawer.open{transform:translate(0)}.filter-drawer-header{z-index:1;border-bottom:1px solid var(--border-light);background:var(--white);justify-content:space-between;align-items:center;padding:18px 20px;display:flex;position:sticky;top:0}.filter-drawer-header strong{color:var(--primary-dark);font-size:1.05rem}.filter-drawer-header button{width:34px;height:34px;color:var(--primary-red);background:var(--off-white);border-radius:999px;place-items:center;font-size:.78rem;font-weight:900;display:grid}.filter-drawer .filter-form{box-shadow:none;border:0;border-radius:0}.filter-drawer-footer{border-top:1px solid var(--border-light);background:var(--white);grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin:8px -24px -24px;padding:16px 24px 24px;display:grid;position:sticky;bottom:0}.filter-section{padding:24px 20px}.filter-form{border:1px solid var(--border-light);background:var(--white);box-shadow:var(--shadow-sm);border-radius:12px;padding:24px}.filter-form label{color:var(--text-muted);gap:8px;font-size:.78rem;font-weight:900;display:grid}.filter-form select,.filter-form input,.rfq-form input,.rfq-form textarea{border:1px solid var(--border-light);width:100%;color:var(--primary-dark);background:var(--white);border-radius:8px;outline:none;padding:12px}.filter-pair{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;display:grid}.filter-form button{min-height:48px}.detail-screen{background:var(--white);min-height:100vh;padding-bottom:92px}.detail-nav{z-index:50;justify-content:space-between;padding:0 20px;display:flex;position:absolute;top:18px;left:0;right:0}.detail-nav-btn{box-shadow:var(--shadow-sm);background:#ffffffeb}.detail-media-box{background:var(--off-white);width:100%;height:320px}.detail-media-box img{object-fit:cover;filter:grayscale(20%);width:100%;height:100%}.detail-content{padding:24px 20px 0}.detail-title{color:var(--primary-dark);margin:8px 0 12px;font-size:1.35rem;font-weight:900;line-height:1.28}.detail-desc{margin:0 0 24px;font-size:.86rem;line-height:1.6}.detail-specs-table{border:1px solid var(--border-light);border-radius:8px;margin-bottom:24px;overflow:hidden}.detail-spec-row{border-bottom:1px solid var(--border-light);grid-template-columns:38% minmax(0,1fr);gap:12px;padding:12px 14px;font-size:.82rem;display:grid}.detail-spec-row:last-child{border-bottom:0}.detail-spec-row span{color:var(--text-muted)}.detail-spec-row strong{color:var(--primary-dark);font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.78rem;line-height:1.35}.drawing-panel{border:1px solid var(--border-light);background:var(--white);border-radius:8px;gap:10px;padding:14px;display:grid}.drawing-panel span{color:var(--text-muted);text-transform:uppercase;font-size:.75rem;font-weight:900}.drawing-panel img{background:var(--off-white);border-radius:6px;width:100%;height:auto}.action-footer{z-index:120;border-top:1px solid var(--border-light);background:var(--white);gap:12px;width:min(430px,100%);padding:16px 20px 24px;display:flex;position:fixed;bottom:0;left:50%;transform:translate(-50%)}.btn{text-align:center;border-radius:6px;flex:1;min-height:48px;padding:14px 12px;font-weight:900}.btn-outline{border:1px solid var(--border-light);color:var(--primary-dark);background:0 0}.cart-screen{padding:20px 20px 120px}.cart-empty-state{min-height:320px;color:var(--text-muted);text-align:center;align-content:center;place-items:center;gap:10px;padding:36px 22px;display:grid}.cart-empty-state .app-svg-icon{width:58px;height:58px;color:var(--primary-red)}.cart-empty-state h3{color:var(--primary-dark);margin:8px 0 0;font-size:1rem}.cart-empty-state p{max-width:250px;margin:0;font-size:.82rem;line-height:1.45}.cart-cad-upload-box{background:var(--white);text-align:center;border:1px dashed #d6d6d6;border-radius:10px;gap:2px;margin-top:18px;padding:16px;display:grid}.cart-cad-upload-box p{color:var(--text-muted);margin:0;font-size:.74rem}.cart-cad-upload-box strong{color:var(--primary-red)}.cart-item{border:1px solid var(--border-light);background:var(--white);box-shadow:var(--shadow-sm);border-radius:12px;grid-template-columns:70px minmax(0,1fr);gap:14px;padding:14px;display:grid;position:relative}.cart-item-img{background:var(--off-white);border-radius:8px;width:70px;height:70px;overflow:hidden}.cart-item-details h4{color:var(--primary-dark);margin:0 24px 4px 0;font-size:.88rem;line-height:1.3}.cart-remove-btn{color:var(--text-muted);background:0 0;font-size:1.2rem;position:absolute;top:12px;right:12px}.cart-item-actions{margin-top:8px;display:flex}.cart-qty-control{background:var(--off-white);border-radius:999px;align-items:center;gap:8px;padding:3px;display:flex}.cart-qty-control button{border:1px solid var(--border-light);background:var(--white);border-radius:999px;place-items:center;width:28px;height:28px;font-weight:900;display:grid}.cart-qty-control input{text-align:center;background:0 0;border:0;outline:0;width:48px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-weight:900}.rfq-form{margin-top:24px}.rfq-form textarea{resize:vertical;min-height:96px}.cart-submit{min-height:48px}.profile-screen{padding:20px}.profile-title{margin:18px 0 12px;padding:0}.profile-card{color:var(--white);background:var(--primary-dark);box-shadow:var(--shadow-md);border-radius:16px;align-items:center;gap:16px;padding:24px;display:flex;position:relative}.guest-profile-card{align-items:flex-start}.avatar{border:2px solid var(--white);background:var(--primary-red);border-radius:999px;place-items:center;width:54px;height:54px;font-size:1.5rem;font-weight:900;display:grid}.profile-card h3{margin:0 0 4px}.profile-card span{color:#aaa;font-size:.72rem;line-height:1.35}.profile-signout{color:var(--white);background:#ffffff1f;border-radius:999px;padding:8px 10px;font-size:.68rem;font-weight:900;position:absolute;top:16px;right:16px}.status-card,.tools-grid button,.tool-card{border:1px solid var(--border-light);background:var(--white);box-shadow:var(--shadow-sm);border-radius:12px;padding:20px}.status-header{border-bottom:1px solid var(--border-light);justify-content:space-between;gap:12px;padding-bottom:12px;display:flex}.status-header span{color:var(--primary-red);font-weight:900}.buyer-meta-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin-top:16px;display:grid}.buyer-meta-grid span{min-width:0;color:var(--text-muted);gap:4px;font-size:.68rem;font-weight:800;display:grid}.buyer-meta-grid strong{color:var(--primary-dark);text-overflow:ellipsis;white-space:nowrap;font-size:.74rem;overflow:hidden}.auth-card{border:1px solid var(--border-light);background:var(--white);box-shadow:var(--shadow-sm);border-radius:12px;gap:12px;padding:20px;display:grid}.auth-card label{color:var(--text-muted);gap:8px;font-size:.74rem;font-weight:900;display:grid}.auth-card input{border:1px solid var(--border-light);width:100%;color:var(--primary-dark);background:var(--white);border-radius:8px;outline:0;padding:12px}.auth-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;display:grid}.guest-link-btn{min-height:42px;color:var(--text-muted);background:0 0;font-size:.78rem;font-weight:900}.auth-note{color:var(--text-muted);font-size:.8rem;line-height:1.45}.signed-out-status p{margin:14px 0 0;font-size:.82rem;line-height:1.5}.tracker-summary{color:var(--text-muted);margin:14px 0 0;font-size:.78rem;line-height:1.45}.profile-timeline{grid-template-columns:repeat(4,minmax(0,1fr));gap:8px;margin-top:18px;display:grid;position:relative}.profile-step{color:var(--text-muted);text-align:center;justify-items:center;gap:8px;font-size:.66rem;font-weight:800;display:grid}.profile-step-circle{background:var(--white);border:2px solid #cfcfcf;border-radius:999px;width:13px;height:13px;display:block}.profile-step.done .profile-step-circle{border-color:var(--primary-red);background:var(--primary-red)}.profile-step.active{color:var(--primary-dark)}.profile-step.active .profile-step-circle{border-color:var(--primary-red)}.tools-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.tools-grid button{color:var(--primary-dark);text-align:left;font-weight:900}.tool-card{align-content:start;gap:8px;min-height:110px;display:grid}.tool-card span{color:var(--primary-dark);font-weight:900}.tool-card small{color:var(--text-muted);font-size:.72rem;line-height:1.35}.calculator-screen{background:var(--app-bg);min-height:100vh;padding-bottom:40px}.calc-card{border:1px solid var(--border-light);background:var(--white);box-shadow:var(--shadow-sm);border-radius:14px;gap:16px;margin:20px;padding:24px;display:grid}.calc-group{gap:8px;display:grid}.calc-label{color:var(--text-muted);font-size:.74rem;font-weight:900}.calc-select,.calc-input{border:1px solid var(--border-light);width:100%;color:var(--primary-dark);background:var(--white);border-radius:8px;outline:0;padding:12px}.btn-calc{min-height:48px;color:var(--white);background:var(--primary-red);border-radius:8px;font-weight:900}.result-panel{background:var(--primary-dark);border-radius:10px;gap:6px;padding:16px;display:grid}.result-desc{color:#b9b9b9;font-size:.72rem;font-weight:700}.result-val{color:var(--white);font-size:1.6rem;font-weight:900}.video-screen{height:100vh;color:var(--white);background:#050505;overflow:hidden}.video-header{z-index:100;color:var(--white);align-items:center;gap:12px;padding:0 20px;display:flex;position:absolute;top:18px;left:0;right:0}.video-header button{color:var(--white);background:0 0;font-size:1.2rem}.video-canvas{background:linear-gradient(#00000038,#000c),radial-gradient(circle at 50% 35%,#3d3d3d 0,#111 48%,#050505 100%);place-items:center;height:100vh;display:grid;position:relative}.video-overlay-info{position:absolute;bottom:48px;left:20px;right:82px}.video-overlay-info span{background:var(--primary-red);border-radius:4px;margin-bottom:8px;padding:4px 8px;font-size:.65rem;font-weight:900;display:inline-block}.video-overlay-info h2{margin:0 0 8px;font-size:1.2rem;line-height:1.25}.video-overlay-info p{color:#ccc;margin:0;font-size:.85rem;line-height:1.4}.action-side-bar{gap:18px;display:grid;position:absolute;bottom:60px;right:20px}.action-side-bar button,.action-side-bar a{width:48px;min-height:48px;color:var(--white);background:#ffffff1f;border:1px solid #ffffff3d;border-radius:999px;place-items:center;font-size:.72rem;font-weight:900;text-decoration:none;display:grid}.bottom-nav{z-index:100;border-top:1px solid var(--border-light);background:var(--white);grid-template-columns:repeat(5,1fr);width:min(430px,100%);height:64px;padding-bottom:8px;display:grid;position:fixed;bottom:0;left:50%;transform:translate(-50%)}.bottom-nav button{color:var(--text-muted);background:0 0;grid-template-rows:24px auto;align-content:center;place-items:center;gap:2px;font-size:.66rem;font-weight:900;display:grid;position:relative}.bottom-nav .app-svg-icon{width:21px;height:21px}.bottom-nav .active{color:var(--primary-red)}.nav-badge{border:2px solid var(--white);min-width:18px;height:18px;color:var(--white);background:var(--primary-red);border-radius:999px;place-items:center;padding:0 5px;font-size:.68rem;line-height:1;display:grid;position:absolute;top:8px;right:16px}.app-modal-overlay{z-index:220;background:#0000006b;place-items:center;padding:20px;display:grid;position:fixed;inset:0}.app-modal-card{background:var(--white);width:min(330px,100%);box-shadow:var(--shadow-lg);text-align:center;border-radius:14px;gap:12px;padding:26px;display:grid}.app-modal-card h3{color:var(--primary-dark);margin:0}.app-modal-card p{color:var(--text-muted);margin:0;font-size:.84rem;line-height:1.45}@media (width<=360px){.prod-grid{gap:10px;padding:0 14px}.prod-card{padding:10px}.filter-pair{grid-template-columns:1fr}}