:root{
  --graphite:#24282e; --graphite-2:#2e333a; --yellow:#e0b400; --steel:#6b7684;
  --text:#e7e9ec; --text-dim:#9aa2ab; --white:#ffffff;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--graphite);color:var(--text);font-family:'Cairo',Tahoma,sans-serif}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer;border:none}
h1,h2,h3{font-family:'Zain',sans-serif}
select,input,textarea{font-family:inherit}

.back-pill{position:fixed;inset-block-start:16px;inset-inline-start:16px;z-index:120;background:rgba(20,22,25,.9);color:var(--yellow);padding:8px 16px;border-radius:6px;font-size:13px;border:1px solid var(--yellow)}

/* ---- Topbar ---- */
.topbar{position:sticky;inset-block-start:0;z-index:90;background:var(--graphite-2);border-block-end:2px solid var(--yellow)}
.topbar__inner{max-width:1320px;margin-inline:auto;padding:14px 24px;display:flex;align-items:center;justify-content:space-between;gap:20px}
.brand{display:flex;align-items:center;gap:10px}
.brand__mark{width:38px;height:38px;border-radius:8px;background:var(--yellow);color:var(--graphite);display:flex;align-items:center;justify-content:center;font-family:'Zain',sans-serif;font-weight:800;font-size:20px}
.brand__name{font-family:'Zain',sans-serif;font-weight:700;font-size:16px}
.topbar__nav{display:flex;gap:24px;font-size:14px;color:var(--text-dim)}
.topbar__nav a:hover{color:var(--yellow)}
.rfq-toggle{background:var(--yellow);color:var(--graphite);font-weight:700;font-size:13.5px;padding:10px 18px;border-radius:6px;display:flex;align-items:center;gap:8px}
.rfq-badge{background:var(--graphite);color:var(--yellow);border-radius:999px;width:20px;height:20px;display:flex;align-items:center;justify-content:center;font-size:11px}

/* ---- Diagram hero (archetype K anchor) ---- */
.diagram-hero{max-width:1320px;margin:0 auto;padding:50px 24px 30px;display:grid;grid-template-columns:1fr 1.3fr;gap:40px;align-items:center}
.eyebrow{color:var(--yellow);font-size:13px;font-weight:700;letter-spacing:.5px}
.diagram-hero__text h1{font-size:clamp(26px,3.2vw,38px);margin:10px 0 16px;line-height:1.3}
.diagram-hero__text p{color:var(--text-dim);font-size:15px;line-height:1.8}
.diagram-wrap{background:var(--graphite-2);border-radius:16px;padding:10px;border:1px solid #3a4048}
.diagram-svg{width:100%;height:auto}
.hotspot{cursor:pointer}
.hotspot__circle{fill:var(--yellow);opacity:.9;transition:opacity .2s,transform .2s}
.hotspot:hover .hotspot__circle,.hotspot:focus .hotspot__circle{opacity:1;transform:scale(1.08)}
.hotspot__label{fill:var(--text);font-size:15px;font-family:'Cairo',sans-serif;text-anchor:middle}

/* ---- Filters ---- */
.filters-bar{background:var(--graphite-2);border-block:1px solid #3a4048;position:sticky;inset-block-start:65px;z-index:60}
.filters-bar__inner{max-width:1320px;margin-inline:auto;padding:14px 24px;display:flex;flex-wrap:wrap;gap:14px;align-items:center;justify-content:space-between}
.filter-group{display:flex;gap:8px;flex-wrap:wrap}
.chip{background:transparent;border:1px solid var(--steel);color:var(--text-dim);padding:8px 16px;border-radius:999px;font-size:13px;font-weight:600}
.chip.is-active{background:var(--yellow);border-color:var(--yellow);color:var(--graphite)}
.filter-group--spec select{background:var(--graphite);border:1px solid var(--steel);color:var(--text);padding:8px 12px;border-radius:6px;font-size:13px}

/* ---- Catalog grid ---- */
.catalog-grid-section{max-width:1320px;margin:0 auto;padding:30px 24px 10px}
.catalog-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(270px,1fr));gap:18px}
.product-card{background:var(--graphite-2);border:1px solid #3a4048;border-radius:12px;padding:18px;display:flex;flex-direction:column;gap:8px}
.product-card__top{display:flex;justify-content:space-between;font-size:11.5px}
.product-card__cat{color:var(--yellow);font-weight:700}
.product-card__origin{color:var(--text-dim)}
.product-card__name{font-size:16px;margin:0;font-family:'Cairo',sans-serif;font-weight:600}
.product-card__code{font-size:12px;color:var(--text-dim);margin:0}
.product-card__price{font-weight:700;color:var(--white);margin:4px 0}
.product-card__actions{display:flex;flex-direction:column;gap:8px;margin-block-start:auto}
.btn-ghost{background:transparent;color:var(--yellow);font-size:13px;font-weight:600;padding:6px 0;text-align:start}
.btn-secondary{background:#3a4048;color:var(--text);padding:9px 14px;border-radius:6px;font-size:13px;font-weight:600}
.btn-primary{background:var(--yellow);color:var(--graphite);padding:12px 20px;border-radius:8px;font-weight:700;font-size:14px}
.empty-state{grid-column:1/-1;text-align:center;color:var(--text-dim);padding:40px 0}

/* ---- Content photo sections ---- */
.content-photo,.brands-note{max-width:1320px;margin:50px auto;padding:0 24px;display:grid;grid-template-columns:1fr 1fr;gap:30px;align-items:center}
.content-photo img,.brands-note__img{border-radius:12px;object-fit:cover;height:280px;width:100%}
.content-photo__text h2,.brands-note__text h2{margin:0 0 12px;font-size:24px}
.content-photo__text p,.brands-note__text p{color:var(--text-dim);line-height:1.8;font-size:14.5px}
.origin-badges{display:flex;gap:10px;flex-wrap:wrap;margin-block-start:14px}
.origin-badge{background:var(--graphite-2);border:1px solid var(--steel);padding:8px 14px;border-radius:999px;font-size:12.5px;color:var(--text)}

.rfq-section{max-width:900px;margin:50px auto;padding:30px 24px;text-align:center;background:var(--graphite-2);border-radius:16px}
.rfq-section h2{margin:0 0 10px}
.rfq-section p{color:var(--text-dim)}

/* ---- Footer ---- */
.site-footer{background:#1a1d21;border-block-start:2px solid var(--yellow);padding:40px 24px 20px;margin-block-start:60px}
.footer-grid{max-width:1320px;margin:0 auto;display:grid;grid-template-columns:repeat(3,1fr);gap:30px}
.footer-grid h3{font-size:15px;margin:0 0 10px;color:var(--yellow)}
.footer-grid p{color:var(--text-dim);font-size:13px;line-height:1.8;margin:0 0 6px}
.tax-line{font-size:11.5px;opacity:.7}
.footer-bottom{text-align:center;color:var(--text-dim);font-size:12px;margin-block-start:30px;padding-block-start:20px;border-block-start:1px solid #333}

/* ---- Product modal ---- */
.modal-backdrop{position:fixed;inset:0;background:rgba(0,0,0,.6);z-index:200;display:none;align-items:center;justify-content:center;padding:16px}
.modal-backdrop.is-open{display:flex}
.modal{background:var(--graphite-2);border-radius:14px;max-width:520px;width:100%;max-height:88vh;overflow:auto;padding:26px;position:relative}
.modal__close{position:absolute;inset-block-start:14px;inset-inline-end:14px;width:32px;height:32px;border-radius:50%;background:#3a4048;color:var(--text);font-size:15px}
.modal__code{color:var(--text-dim);font-size:13px;margin:4px 0 16px}
.spec-table{width:100%;border-collapse:collapse;font-size:13.5px;margin-block-end:16px}
.spec-table td{padding:9px 6px;border-block-end:1px solid #3a4048}
.spec-table td:first-child{color:var(--text-dim);width:45%}
.modal__price{font-weight:700;font-size:16px;margin-block-end:14px}

/* ---- RFQ panel (off-canvas, anchored inline-start = right edge in RTL) ---- */
.rfq-backdrop{position:fixed;inset:0;background:rgba(0,0,0,.5);z-index:210;opacity:0;pointer-events:none;transition:opacity .25s}
.rfq-backdrop.is-open{opacity:1;pointer-events:auto}
.rfq-panel{position:fixed;inset-block:0;inset-inline-start:0;width:88%;max-width:400px;background:var(--graphite-2);z-index:220;
  transform:translateX(100%);transition:transform .3s ease;display:flex;flex-direction:column;padding:22px;overflow-y:auto}
.rfq-panel.is-open{transform:none}
.rfq-panel__head{display:flex;justify-content:space-between;align-items:center;margin-block-end:18px}
.rfq-panel__head h3{margin:0}
.rfq-empty{color:var(--text-dim);font-size:14px}
.rfq-item{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:12px 0;border-block-end:1px solid #3a4048;font-size:13px}
.rfq-item__code{color:var(--text-dim);font-size:11.5px}
.rfq-item__qty{display:flex;align-items:center;gap:8px}
.qty-btn{width:26px;height:26px;border-radius:6px;background:#3a4048;color:var(--text)}
.rfq-item__remove{color:var(--text-dim);font-size:14px}
.rfq-form{display:flex;flex-direction:column;gap:10px;margin-block-start:18px}
.rfq-form input,.rfq-form textarea{background:var(--graphite);border:1px solid var(--steel);color:var(--text);padding:11px 14px;border-radius:8px;font-size:13.5px}
.rfq-confirm{text-align:center;padding:20px 0}
.rfq-confirm__icon{width:52px;height:52px;border-radius:50%;background:var(--yellow);color:var(--graphite);display:flex;align-items:center;justify-content:center;font-size:24px;margin:0 auto 14px}
.rfq-confirm__ref{font-weight:700;font-size:15px;color:var(--yellow)}
.rfq-confirm p{color:var(--text-dim);font-size:13.5px;line-height:1.7}

/* ---- Responsive ---- */
@media (max-width:900px){
  .diagram-hero{grid-template-columns:1fr}
  .content-photo,.brands-note{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:20px}
  .topbar__nav{display:none}
}
@media (max-width:480px){
  .diagram-hero{padding:30px 16px 20px}
  .catalog-grid-section{padding:20px 16px}
  .filters-bar__inner{padding:12px 16px}
  .content-photo,.brands-note{padding:0 16px}
}