/* UNIFIED FULL-SCREEN HERO */
.bt-hero-full {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.bt-hero-full-img-wrap { position: absolute; inset: 0; }
.bt-hero-full-img { width: 100%; height: 100%; object-fit: cover; object-position: center 35%; }
.bt-hero-full-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(
    105deg,
    rgba(8,25,4,0.88) 0%,
    rgba(8,25,4,0.65) 45%,
    rgba(8,25,4,0.25) 75%,
    rgba(8,25,4,0.05) 100%
  );
}
.bt-hero-full-content {
  position: relative; z-index: 2;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: center;
  padding-top: calc(var(--nav-h) + 2rem);
  padding-bottom: 4rem;
}
.bt-hero-full-left { display: flex; flex-direction: column; gap: 0; }
.bt-hero-full-h1 {
  font-size: clamp(2.4rem, 5.5vw, 4rem);
  font-weight: 500; color: var(--white);
  line-height: 1.12; letter-spacing: -0.5px;
  margin-bottom: 1.25rem;
}
.bt-hero-full-h1 em { color: var(--green-100); font-style: normal; }
.bt-hero-full-desc {
  font-size: 16px; color: rgba(255,255,255,0.80);
  line-height: 1.7; margin-bottom: 1.5rem;
  max-width: 460px;
}
/* Symbol on dark bg */
.bt-hero-full-left .bt-symbol-item { color: rgba(255,255,255,0.75); margin-bottom: 1.5rem; }
/* Buttons on dark bg */
.bt-hero-full-left .btn-secondary {
  background: transparent;
  border-color: rgba(255,255,255,0.5);
  color: var(--white);
}
.bt-hero-full-left .btn-secondary:hover { background: rgba(255,255,255,0.1); }

/* Cert badges dark variant */
.bt-cert-badge--dark {
  background: rgba(255,255,255,0.12) !important;
  color: rgba(255,255,255,0.85) !important;
  border-color: rgba(255,255,255,0.2) !important;
}

/* Floating product image */
.bt-hero-full-right {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  justify-content: center;
  gap: 0.5rem;
}
.bt-hero-full-right-wrap {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.bt-hero-full-product {
  width: 120%;
  max-width: 720px;
  object-fit: contain;
  filter: drop-shadow(0 20px 60px rgba(0,0,0,0.4));
}

/* Symbol badge — above the product image, right-aligned */
.bt-hero-symbol-badge {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 5px;
  margin-right: 2rem;
}
.bt-hero-symbol-img {
  width: 80px;
  height: 80px;
  object-fit: contain;
  filter: drop-shadow(0 4px 12px rgba(0,0,0,0.25));
}
.bt-hero-symbol-label {
  font-size: 11px;
  font-weight: 500;
  color: rgba(255,255,255,0.85);
  text-align: center;
  text-shadow: 0 1px 4px rgba(0,0,0,0.5);
  letter-spacing: 0.02em;
}

/* STATS BAR */

.bt-stats-bar {
  background: var(--near-black);
  padding: 2.25rem 0;
}
.bt-stats-grid {
  display: flex; align-items: center;
  justify-content: center; flex-wrap: wrap;
}
.bt-stat {
  display: flex; flex-direction: column;
  align-items: center; text-align: center;
  padding: 0.5rem 2.5rem;
}
.bt-stat-num {
  font-size: 24px; font-weight: 600;
  color: var(--green-100); line-height: 1;
  margin-bottom: 4px;
}
.bt-stat-label {
  font-size: 11px; color: var(--gray-400);
  line-height: 1.4; max-width: 120px;
}
.bt-stat-div {
  width: 0.5px; height: 44px;
  background: rgba(255,255,255,0.12);
  flex-shrink: 0;
}

/* COMPARISON TABLE */
.bt-table-wrap {
  overflow-x: auto;
  border-radius: var(--radius-lg);
  border: 0.5px solid var(--gray-200);
}
.bt-table {
  width: 100%; border-collapse: collapse;
  font-size: 14px;
}
.bt-table thead tr {
  background: var(--off-white);
  border-bottom: 1px solid var(--gray-200);
}
.bt-table th {
  padding: 1rem 1.25rem;
  font-weight: 500; font-size: 13px;
  color: var(--near-black); text-align: left;
  vertical-align: bottom;
}
.bt-table th small { font-size: 11px; color: var(--gray-600); font-weight: 400; }
.bt-table-biotoe {
  background: var(--green-50) !important;
  border-left: 2px solid var(--green-600);
  border-right: 2px solid var(--green-600);
  font-weight: 500; color: var(--green-800) !important;
}
.bt-table thead .bt-table-biotoe { border-top: 2px solid var(--green-600); }
.bt-table tbody tr:last-child .bt-table-biotoe { border-bottom: 2px solid var(--green-600); }
.bt-table-badge {
  display: inline-flex; font-size: 10px;
  background: var(--green-600); color: var(--white);
  padding: 2px 8px; border-radius: var(--radius-pill);
  margin-left: 6px; font-weight: 500; vertical-align: middle;
}
.bt-table td {
  padding: 0.875rem 1.25rem;
  border-bottom: 0.5px solid var(--gray-200);
  color: var(--gray-800); vertical-align: middle;
}
.bt-table tbody tr:last-child td { border-bottom: none; }
.bt-table tbody tr:hover td { background: var(--gray-50); }
.bt-table tbody tr:hover .bt-table-biotoe { background: #dff0c8 !important; }
.bt-table-prop { color: var(--near-black) !important; font-weight: 500; background: var(--white); }
.bt-best { color: var(--green-800) !important; }
.bt-best-other { color: var(--gray-800); }
.bt-tick { color: var(--green-600); font-weight: 600; }
.bt-cross { color: var(--gray-400); }
.bt-table-note {
  font-size: 12px; color: var(--gray-600);
  padding: 0.75rem 1.25rem;
  background: var(--green-50);
  border-top: 0.5px solid var(--green-100);
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
}

/* GALLERY */
.bt-gallery {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 1rem;
}
.bt-gallery-main {
  background: var(--white);
  border: 0.5px solid var(--gray-200);
  border-radius: var(--radius-xl);
  overflow: hidden;
  display: flex; align-items: center; justify-content: center;
  padding: 2rem; min-height: 400px;
}
.bt-gallery-img-main {
  width: 100%; max-height: 380px;
  object-fit: contain; mix-blend-mode: multiply;
}
.bt-gallery-grid {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 1rem;
}
.bt-gallery-thumb {
  background: var(--white);
  border: 0.5px solid var(--gray-200);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex; align-items: center; justify-content: center;
  padding: 1rem; aspect-ratio: 1;
  transition: border-color 0.2s, transform 0.2s;
  cursor: pointer;
}
.bt-gallery-thumb:hover { border-color: var(--green-100); transform: scale(1.02); }
.bt-gallery-img {
  width: 100%; height: 100%;
  object-fit: contain; mix-blend-mode: multiply;
}

/* CAD SECTION */
.bt-cad-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem; align-items: center;
}
.bt-cad-desc {
  font-size: 16px; color: var(--gray-800);
  line-height: 1.7; margin-bottom: 1rem;
}
.bt-cad-features {
  display: flex; flex-direction: column; gap: 8px;
  margin-top: 1.25rem;
}
.bt-cad-features li {
  font-size: 14px; color: var(--gray-800);
  display: flex; align-items: center; gap: 8px;
}
.bt-cad-features li::before {
  content: ''; width: 5px; height: 5px;
  border-radius: 50%; background: var(--green-600);
  flex-shrink: 0;
}
.bt-cad-img-stack { position: relative; }
.bt-cad-img-wrap--main {
  background: var(--off-white);
  border-radius: var(--radius-xl);
  overflow: hidden;
  display: flex; align-items: center; justify-content: center;
  padding: 2rem; min-height: 400px;
}
.bt-cad-img { width: 100%; object-fit: contain; }

/* CERTIFICATIONS */
.bt-cert-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem; align-items: center;
}
.bt-cert-desc {
  font-size: 16px; color: rgba(255,255,255,0.75);
  line-height: 1.7; margin: 1rem 0 1.75rem;
}
.bt-cert-list { display: flex; flex-direction: column; gap: 1.25rem; }
.bt-cert-item { display: flex; gap: 1rem; align-items: flex-start; }
.bt-cert-icon {
  width: 28px; height: 28px; flex-shrink: 0;
  background: rgba(255,255,255,0.12);
  border: 0.5px solid rgba(255,255,255,0.2);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 13px; color: var(--green-100);
  margin-top: 2px;
}
.bt-cert-item-title {
  font-size: 15px; font-weight: 500;
  color: var(--white); margin-bottom: 3px;
}
.bt-cert-item-desc {
  font-size: 13px; color: rgba(255,255,255,0.65);
  line-height: 1.55;
}
.bt-cert-right {
  display: flex; align-items: center; justify-content: center;
}
.bt-cert-img {
  width: 100%; max-width: 560px;
  border-radius: var(--radius-lg);
  box-shadow: none;
}

/* ENVIRONMENT */
.bt-env-grid {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 1.5rem; align-items: center;
}
.bt-env-card {
  border-radius: var(--radius-xl);
  padding: 2rem;
}
.bt-env-card--good {
  background: var(--green-50);
  border: 1.5px solid var(--green-100);
}
.bt-env-card--bad {
  background: var(--off-white);
  border: 0.5px solid var(--gray-200);
}
.bt-env-label {
  font-size: 13px; font-weight: 600;
  color: var(--near-black);
  margin-bottom: 1.25rem;
  padding-bottom: 0.75rem;
  border-bottom: 0.5px solid rgba(0,0,0,0.1);
}
.bt-env-list { display: flex; flex-direction: column; gap: 10px; }
.bt-env-list li {
  font-size: 14px; color: var(--gray-800);
  display: flex; align-items: flex-start; gap: 8px;
  line-height: 1.4;
}
.bt-env-vs {
  font-size: 13px; font-weight: 600;
  color: var(--gray-400); text-align: center;
}
.bt-env-footnote {
  font-size: 12px; color: var(--gray-600);
  margin-top: 2rem; text-align: center;
}
.bt-env-footnote a { color: var(--green-600); }

/* RESPONSIVE */
@media (max-width: 1024px) {
  .bt-hero-grid { grid-template-columns: 1fr; gap: 2.5rem; }
  .bt-cad-grid { grid-template-columns: 1fr; gap: 2.5rem; }
  .bt-cert-grid { grid-template-columns: 1fr; gap: 2.5rem; }
  .bt-gallery { grid-template-columns: 1fr; }
  .bt-gallery-main { min-height: 280px; }
  .bt-env-grid { grid-template-columns: 1fr; }
  .bt-env-vs { display: none; }
}
@media (max-width: 768px) {
  .bt-stats-grid { justify-content: flex-start; }
  .bt-stat { width: 50%; padding: 0.75rem 1rem; }
  .bt-stat-div { display: none; }
  .bt-gallery-grid { grid-template-columns: repeat(3, 1fr); }
  .bt-hero { padding-top: calc(var(--nav-h) + 1.5rem); }
}
@media (max-width: 480px) {
  .bt-gallery-grid { grid-template-columns: 1fr 1fr; }
  .bt-stat { width: 100%; }
  .bt-hero-actions { flex-direction: column; }
}

/* HERO BANNER */
.bt-hero-banner {
  position: relative; min-height: 70vh;
  display: flex; align-items: flex-end; overflow: hidden;
}
.bt-hero-banner-img-wrap { position: absolute; inset: 0; }
.bt-hero-banner-img { width: 100%; height: 100%; object-fit: cover; object-position: center 40%; }
.bt-hero-banner-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(
    105deg,
    rgba(10,30,5,0.75) 0%,
    rgba(10,30,5,0.45) 55%,
    rgba(10,30,5,0.05) 100%
  );
}
.bt-hero-banner-content {
  position: relative; z-index: 2;
  padding-bottom: 4rem; padding-top: 2rem;
}
.bt-hero-banner-text { max-width: 560px; }
.bt-hero-banner-h1 {
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  font-weight: 500; color: var(--white);
  line-height: 1.15; letter-spacing: -0.5px;
  margin-bottom: 1rem;
}
.bt-hero-banner-h1 em { color: var(--green-100); font-style: normal; }
.bt-hero-banner-sub {
  font-size: 16px; color: rgba(255,255,255,0.80);
  line-height: 1.6; letter-spacing: 0.01em;
}