/* ── BREADCRUMB ── */
 .breadcrumb {
   background-color: black;
   padding-top: 70px;
   padding-bottom: 10px;
   padding-left: 56px;
   padding-right: 56px;
   display: flex;
   align-items: center;
   gap: 8px;
 }

 .bc-item {
   font-family: var(--mono);
   font-size: var(--fs-text);
   letter-spacing: 0.08em;
   color: var(--rule);
   text-decoration: none;
   transition: color 0.2s;
 }

 .bc-item:hover {
   color: var(--rule);
 }

 .bc-sep {
   font-family: var(--mono);
   font-size: var(--fs-text);
   color: var(--rule);
 }

 .bc-current {
   font-family: var(--mono);
   font-size: var(--fs-text);
   letter-spacing: 0.08em;
   color: var(--rule);
 }


 /* ── HERO ── */
 .hero {
   min-height: 100vh;
   background: var(--white);
   display: grid;
   grid-template-columns: 1fr 1fr;
   gap: 64px;
   align-items: center;
   overflow: hidden;
   border-bottom: 1px solid var(--rule);
 }

 .hero-left {
   display: flex;
   flex-direction: column;
   justify-content: center;
   padding: 80px 56px 80px 56px;
   position: relative;
 }

 .hero-eyebrow {
   font-family: var(--mono);
   font-size: 11px;
   letter-spacing: 0.14em;
   color: var(--teal);
   text-transform: uppercase;
   display: flex;
   align-items: center;
   gap: 10px;
   margin-bottom: 24px;
   opacity: 0;
   animation: fadeUp 0.5s 0.1s forwards;
 }

 .hero-eyebrow::before {
   content: '';
   width: 28px;
   height: 1px;
   background: var(--teal);
 }

 .hero-h1 {
   font-family: var(--display);
   font-size: clamp(36px, 4vw, 54px);
   font-weight: 700;
   line-height: 1.05;
   color: var(--ink);
   margin-bottom: 20px;
   opacity: 0;
   animation: fadeUp 0.5s 0.2s forwards;
 }

 .hero-h1 em {
   font-style: italic;
   color: var(--teal);
 }

 .hero-sub {
   font-size: 16px;
   color: var(--ink-mid);
   line-height: 1.7;
   max-width: 460px;
   margin-bottom: 36px;
   opacity: 0;
   animation: fadeUp 0.5s 0.3s forwards;
 }

 .hero-ctas {
   display: flex;
   gap: 14px;
   flex-wrap: wrap;
   opacity: 0;
   animation: fadeUp 0.5s 0.4s forwards;
 }

 .btn-primary {
   display: inline-flex;
   align-items: center;
   gap: 8px;
   background: var(--teal);
   color: var(--white);
   font-family: var(--sans);
   font-weight: 600;
   font-size: 16px;
   letter-spacing: 0.05em;
   padding: 14px 26px;
   text-decoration: none;
   transition: background 0.2s, transform 0.15s;
 }

 .btn-primary:hover {
   background: var(--teal-lt);
   transform: translateY(-1px);
 }

 .btn-secondary {
   display: inline-flex;
   align-items: center;
   gap: 8px;
   background: transparent;
   color: var(--ink);
   font-family: var(--sans);
   font-weight: 600;
   font-size: 16px;
   letter-spacing: 0.05em;
   padding: 14px 26px;
   border: 1.5px solid var(--ink);
   text-decoration: none;
   transition: border-color 0.2s, color 0.2s;
 }

 .btn-secondary:hover {
   border-color: var(--teal);
   color: var(--teal);
 }

 .hero-diagram {
   align-self: stretch;
   background: var(--ink);
   display: flex;
   align-items: center;
   justify-content: center;
   padding: 40px 32px;
   position: relative;
   overflow: hidden;
   opacity: 0;
   animation: fadeIn 0.7s 0.3s forwards;
 }

 .hero-diagram::before {
   content: '';
   position: absolute;
   inset: 0;
   background: repeating-linear-gradient(45deg, transparent, transparent 3px, rgba(10, 107, 82, 0.04) 3px, rgba(10, 107, 82, 0.04) 4px);
 }

 /* ── SHARED ── */
 .section-label {
   font-family: var(--mono);
   font-size: 13px;
   letter-spacing: 0.14em;
   color: var(--teal);
   text-transform: uppercase;
   display: flex;
   align-items: center;
   gap: 8px;
   margin-bottom: 12px;
 }

 .section-label::before {
   content: '';
   width: 20px;
   height: 1px;
   background: var(--teal);
 }

 .section-title {
   font-family: var(--display);
   font-size: clamp(26px, 2.8vw, 38px);
   font-weight: 700;
   line-height: 1.1;
   color: var(--ink);
 }

 .section-title em {
   font-style: italic;
   color: var(--teal);
 }

 .section-header-row {
   display: flex;
   align-items: flex-end;
   justify-content: space-between;
   margin-bottom: 48px;
   padding-bottom: 24px;
   border-bottom: 1px solid var(--rule);
 }

 .section-count {
   font-family: var(--mono);
   font-size: 64px;
   font-weight: 500;
   color: var(--rule);
   line-height: 1;
 }

 /* ── SOLAR AS ARCHITECTURE INTRO ── */
 .intro {
   padding: 80px 56px;
   background: var(--paper);
   display: grid;
   grid-template-columns: 1fr 1fr;
   gap: 80px;
   align-items: start;
 }

 .intro-body {
   font-size: 16px;
   color: var(--ink-mid);
   line-height: 1.8;
 }

 .intro-body p+p {
   margin-top: 16px;
 }

 /* ── PRODUCT TYPES — image-led grid ── */
 .products {
   padding: 80px 56px;
   background: var(--white);
 }

 .products-grid {
   display: grid;
   grid-template-columns: repeat(2, 1fr);
   gap: 2px;
   background: var(--rule);
 }

 .product-card {
   background: var(--white);
   display: flex;
   flex-direction: column;
   position: relative;
   overflow: hidden;
 }

 .product-card::after {
   content: '';
   position: absolute;
   top: 0;
   left: 0;
   right: 0;
   height: 3px;
   background: var(--teal);
   transform: scaleX(0);
   transform-origin: left;
   transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
   z-index: 2;
 }

 .product-card:hover::after {
   transform: scaleX(1);
 }

 .product-card:hover .prod-img img {
   transform: scale(1.04);
   filter: grayscale(0%) brightness(1);
 }

 .product-card:hover .prod-body {
   background: var(--teal-bg);
 }

 .prod-img {
   position: relative;
   height: 300px;
   overflow: hidden;
   flex-shrink: 0;
 }

 .prod-img img {
   width: 100%;
   height: 100%;
   object-fit: cover;
   display: block;
   filter: grayscale(20%) brightness(0.85);
   transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1), filter 0.4s;
 }

 .prod-img-overlay {
   position: absolute;
   inset: 0;
   background: linear-gradient(to bottom, transparent 40%, rgba(10, 107, 82, 0.18) 100%);
 }

 .prod-img-ref {
   position: absolute;
   top: 12px;
   right: 12px;
   z-index: 1;
   font-family: var(--mono);
   font-size: 12px;
   letter-spacing: 0.08em;
   color: var(--white);
   background: rgba(0, 0, 0, 0.45);
   padding: 3px 8px;
   backdrop-filter: blur(4px);
 }

 .prod-body {
   padding: 28px 28px 32px;
   flex: 1;
   transition: background 0.25s;
 }

 .prod-title {
   font-family: var(--sans);
   font-size: 18px;
   font-weight: 700;
   color: var(--ink);
   margin-bottom: 10px;
   line-height: 1.2;
 }

 .prod-desc {
   font-size: 16px;
   color: var(--ink-low);
   line-height: 1.7;
   margin-bottom: 16px;
 }

 .prod-tags {
   display: flex;
   flex-wrap: wrap;
   gap: 6px;
 }

 .prod-tag {
   font-family: var(--mono);
   font-size: 13px;
   letter-spacing: 0.05em;
   color: var(--ink-mid);
   background: var(--paper);
   padding: 3px 8px;
 }

 /* ── WHY SPECIFY BIPV ── */
 .why-bipv {
   padding: 80px 56px;
   background: var(--paper);
   display: grid;
   grid-template-columns: 320px 1fr;
   gap: 80px;
   align-items: start;
 }

 .why-list {
   display: flex;
   flex-direction: column;
 }

 .why-item {
   display: grid;
   grid-template-columns: 48px 1fr;
   gap: 20px;
   padding: 24px 0;
   border-bottom: 1px solid var(--rule);
 }

 .why-item:first-child {
   border-top: 1px solid var(--rule);
 }

 .why-num {
   font-family: var(--mono);
   font-size: 24px;
   font-weight: 500;
   color: rgba(10, 107, 82, 0.3);
   line-height: 1;
 }

 .why-title {
   font-family: var(--sans);
   font-size: 18px;
   font-weight: 700;
   color: var(--ink);
   margin-bottom: 4px;
 }

 .why-desc {
   font-size: 16px;
   color: var(--ink-low);
   line-height: 1.65;
 }

 /* ── SPECIFIER SERVICE — 5-step ── */
 .specifier {
   padding: 80px 56px;
   background: var(--ink);
 }

 .specifier-inner {
   display: grid;
   grid-template-columns: 1fr 1fr;
   gap: 80px;
   align-items: start;
 }

 .spec-label {
   font-family: var(--mono);
   font-size: 13px;
   letter-spacing: 0.12em;
   color: var(--teal-lt);
   text-transform: uppercase;
   margin-bottom: 16px;
 }

 .spec-title {
   font-family: var(--display);
   font-size: clamp(26px, 2.5vw, 36px);
   font-weight: 700;
   color: var(--white);
   line-height: 1.1;
   margin-bottom: 16px;
 }

 .spec-title em {
   font-style: italic;
   color: var(--teal-lt);
 }

 .spec-body {
   font-size: 16px;
   color: rgba(255, 255, 255, 0.45);
   line-height: 1.75;
   margin-bottom: 32px;
 }

 .spec-cta {
   display: inline-flex;
   align-items: center;
   gap: 10px;
   background: var(--teal);
   color: var(--white);
   font-family: var(--sans);
   font-weight: 600;
   font-size: 16px;
   letter-spacing: 0.05em;
   padding: 16px 28px;
   text-decoration: none;
   transition: background 0.2s;
 }

 .spec-cta:hover {
   background: var(--teal-lt);
 }

 .spec-steps {
   display: flex;
   flex-direction: column;
 }

 .spec-step {
   display: grid;
   grid-template-columns: 32px 1fr;
   gap: 16px;
   padding: 20px 0;
   border-bottom: 1px solid rgba(255, 255, 255, 0.06);
 }

 .spec-step:last-child {
   border-bottom: none;
 }

 .spec-num-wrap {
   display: flex;
   flex-direction: column;
   align-items: center;
 }

 .spec-num {
   width: 32px;
   height: 32px;
   background: rgba(10, 107, 82, 0.15);
   border: 1px solid rgba(10, 107, 82, 0.35);
   display: flex;
   align-items: center;
   justify-content: center;
   font-family: var(--mono);
   font-size: 14px;
   color: var(--teal-lt);
   flex-shrink: 0;
 }

 .spec-connector {
   flex: 1;
   width: 1px;
   background: rgba(10, 107, 82, 0.2);
   margin: 4px auto 0;
   min-height: 14px;
 }

 .spec-step:last-child .spec-connector {
   display: none;
 }

 .spec-step-title {
   font-family: var(--sans);
   font-size: 16px;
   font-weight: 700;
   color: var(--white);
   margin-bottom: 4px;
 }

 .spec-step-desc {
   font-size: 15px;
   color: rgba(255, 255, 255, 0.4);
   line-height: 1.6;
 }

 /* ── CASE STUDY ── */
 .proof {
   padding: 80px 56px;
   background: var(--white);
 }

 .cs-card {
   background: var(--paper);
   border: 1px solid var(--rule);
   max-width: 100%;
 }

 .cs-panel {
   background: var(--ink);
   padding: 36px;
   position: relative;
   overflow: hidden;
   min-height: 220px;
   display: flex;
   flex-direction: column;
   justify-content: space-between;
 }

 .cs-bg {
   position: absolute;
   inset: 0;
   background: repeating-linear-gradient(135deg, transparent, transparent 4px, rgba(10, 107, 82, 0.05) 4px, rgba(10, 107, 82, 0.05) 5px), linear-gradient(160deg, #0E1810 0%, #0A1F18 50%, #051510 100%);
 }

 .cs-badge {
   position: relative;
   z-index: 1;
   font-family: var(--mono);
   font-size: 13px;
   letter-spacing: 0.1em;
   color: var(--teal-lt);
   text-transform: uppercase;
   background: rgba(0, 0, 0, 0.35);
   border: 1px solid rgba(10, 107, 82, 0.35);
   padding: 5px 10px;
   display: inline-block;
   align-self: flex-start;
 }

 .cs-metrics-strip {
   position: relative;
   z-index: 1;
   display: grid;
   grid-template-columns: repeat(4, 1fr);
   border-top: 1px solid rgba(255, 255, 255, 0.08);
   margin: 24px -36px 0;
   padding: 0 36px;
 }

 .csm {
   padding: 16px 0;
   border-right: 1px solid rgba(255, 255, 255, 0.08);
   padding-right: 16px;
 }

 .csm:last-child {
   border-right: none;
 }

 .csm:not(:first-child) {
   padding-left: 16px;
 }

 .csm-val {
   font-family: var(--mono);
   font-size: 20px;
   color: var(--white);
   display: block;
 }

 .csm-val em {
   font-style: normal;
   color: var(--teal-lt);
   font-size: 14px;
 }

 .csm-key {
   font-family: var(--mono);
   font-size: 12px;
   letter-spacing: 0.1em;
   color: rgba(255, 255, 255, 0.3);
   text-transform: uppercase;
 }

 .cs-body {
   padding: 28px 28px 32px;
 }

 .cs-loc {
   font-family: var(--mono);
   font-size: 13px;
   letter-spacing: 0.08em;
   color: var(--teal);
   text-transform: uppercase;
   margin-bottom: 10px;
 }

 .cs-title {
   font-family: var(--display);
   font-size: 20px;
   font-weight: 700;
   color: var(--ink);
   margin-bottom: 10px;
   line-height: 1.2;
 }

 .cs-summary {
   font-size: 16px;
   color: var(--ink-mid);
   line-height: 1.7;
   margin-bottom: 20px;
 }

 .cs-outcomes {
   display: flex;
   flex-direction: column;
   gap: 8px;
   margin-bottom: 20px;
 }

 .cs-outcome {
   display: flex;
   align-items: center;
   gap: 10px;
   font-family: var(--mono);
   font-size: 16px;
   color: var(--ink-mid);
 }

 .cs-outcome-dot {
   width: 6px;
   height: 6px;
   background: var(--teal);
   flex-shrink: 0;
 }

 .cs-link {
   font-family: var(--mono);
   font-size: 13px;
   letter-spacing: 0.1em;
   color: var(--teal);
   text-transform: uppercase;
   text-decoration: none;
   display: inline-flex;
   align-items: center;
   gap: 8px;
   border-bottom: 1px solid var(--teal);
   padding-bottom: 2px;
   transition: gap 0.2s;
 }

 .cs-link:hover {
   gap: 12px;
 }

 /* ── CTA BAND ── */
 .cta-band {
   padding: 80px 56px;
   background: var(--paper);
   display: grid;
   grid-template-columns: 1fr auto;
   align-items: center;
   gap: 40px;
   border-top: 1px solid var(--rule);
 }

 .cta-band-title {
   font-family: var(--display);
   font-size: clamp(26px, 3vw, 40px);
   font-weight: 700;
   color: var(--ink);
   line-height: 1.1;
 }

 .cta-band-title em {
   font-style: italic;
   color: var(--teal);
 }

 .cta-band-sub {
   font-size: 16px;
   color: var(--ink-mid);
   line-height: 1.6;
   margin-top: 10px;
   max-width: 420px;
 }

 .cta-group {
   display: flex;
   flex-direction: column;
   gap: 12px;
   align-items: flex-end;
 }

 /* ── ANIMATIONS ── */
 @keyframes fadeUp {
   from {
     opacity: 0;
     transform: translateY(16px);
   }

   to {
     opacity: 1;
     transform: translateY(0);
   }
 }

 @keyframes fadeIn {
   from {
     opacity: 0;
   }

   to {
     opacity: 1;
   }
 }

 @keyframes flow {
   0% {
     stroke-dashoffset: 24;
   }

   100% {
     stroke-dashoffset: 0;
   }
 }

 .flow-line {
   stroke-dasharray: 6 4;
   animation: flow 1.4s linear infinite;
 }

 .reveal {
   opacity: 0;
   transform: translateY(20px);
   transition: opacity 0.6s, transform 0.6s;
 }

 .reveal.visible {
   opacity: 1;
   transform: translateY(0);
 }

 .rd1 {
   transition-delay: 0.1s;
 }

 .rd2 {
   transition-delay: 0.2s;
 }

 .rd3 {
   transition-delay: 0.3s;
 }

 /* ── RESPONSIVE ── */
 @media (max-width:1024px) {

   .hero {
     grid-template-columns: 1fr;
     padding: 28px 32px 0;
     gap: 0;
   }

   .hero-left {
     padding-bottom: 40px;
   }

   .hero-diagram {
     min-height: 300px;
   }

   .intro {
     grid-template-columns: 1fr;
     padding: 60px 32px;
     gap: 40px;
   }

   .products {
     padding: 60px 32px;
   }

   .why-bipv {
     grid-template-columns: 1fr;
     padding: 60px 32px;
     gap: 40px;
   }

   .specifier {
     padding: 60px 32px;
   }

   .specifier-inner {
     grid-template-columns: 1fr;
     gap: 48px;
   }

   .proof {
     padding: 60px 32px;
   }

   .cta-band {
     grid-template-columns: 1fr;
     padding: 60px 32px;
   }

   .cta-group {
     align-items: flex-start;
   }
 }

 @media (max-width:640px) {


   .hero-left {
     padding: 48px 20px;
   }

   .hero {
     padding: 0px;
   }

   .intro {
     padding: 48px 20px;
   }

   .products {
     padding: 48px 20px;
   }

   .products-grid {
     grid-template-columns: 1fr;
   }

   .why-bipv {
     padding: 48px 20px;
   }

   .specifier {
     padding: 48px 20px;
   }

   .proof {
     padding: 48px 20px;
   }

   .cta-band {
     padding: 48px 20px;
   }

   .cs-metrics-strip {
     grid-template-columns: 1fr 1fr;
   }
 }