/* ─── RESET & BASE ─── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --blue:       #3675FF;
  --blue-dark:  #2455CC;
  --blue-light: #EDF3FF;
  --blue-mid:   #DAEAFF;
  --teal:       #00C49A;
  --navy:       #1A2B6B;
  --text:       #111827;
  --muted:      #6B7280;
  --border:     #E5E7EB;
  --white:      #FFFFFF;
  --gray-50:    #F9FAFB;
  --gray-100:   #F3F4F6;
  --gray-200:   #E5E7EB;
  --red:        #EF4444;
  --gold:       #F59E0B;
  --green:      #10B981;
  --shadow-sm:  0 1px 4px rgba(0,0,0,.07);
  --shadow:     0 4px 16px rgba(0,0,0,.08);
  --shadow-lg:  0 12px 40px rgba(0,0,0,.12);
  --radius-sm:  8px;
  --radius:     12px;
  --radius-lg:  20px;
  --radius-xl:  32px;
  --pill:       9999px;
  --transition: all .22s ease;
  --max-w:      1200px;
}
html { scroll-behavior: smooth; }
body {
  font-family: 'Montserrat', sans-serif;
  color: var(--text);
  background: var(--white);
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
button { font-family: inherit; cursor: pointer; border: none; }
ul, ol { list-style: none; }

/* ─── UTILS ─── */
.inner { max-width: var(--max-w); margin: 0 auto; padding: 0 32px; }
.btn {
  display: inline-flex; align-items: center; gap: 7px;
  font-size: 14px; font-weight: 600; letter-spacing: -.01em;
  border-radius: var(--pill); padding: 12px 22px; border: none;
  cursor: pointer; transition: var(--transition); white-space: nowrap;
  text-decoration: none;
}
.btn-primary { background: var(--blue); color: var(--white); }
.btn-primary:hover { background: var(--blue-dark); transform: translateY(-1px); box-shadow: 0 6px 20px rgba(54,117,255,.35); }
.btn-teal { background: var(--teal); color: var(--white); }
.btn-teal:hover { background: #009c7a; transform: translateY(-1px); box-shadow: 0 6px 20px rgba(0,196,154,.35); }
.btn-outline { background: transparent; color: var(--blue); border: 2px solid var(--blue); }
.btn-outline:hover { background: var(--blue-light); }
.btn-white { background: var(--white); color: var(--navy); }
.btn-white:hover { background: #f0f2ff; }
.tag {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 12px; font-weight: 700; letter-spacing: .07em; text-transform: uppercase;
  color: var(--blue);
}
.tag::before { content: ''; width: 8px; height: 8px; border-radius: 50%; background: var(--blue); display: block; }

/* ─── 1. ANNOUNCEMENT BAR ─── */
.announce-bar {
  background: var(--teal); color: var(--white);
  text-align: center; padding: 11px 32px;
  font-size: 13.5px; font-weight: 600; letter-spacing: -.01em;
}
.announce-bar a { color: var(--white); font-weight: 700; text-decoration: underline; }
.announce-bar a:hover { opacity: .85; }

/* ─── 2. NAVIGATION ─── */
#site-header {
  position: sticky; top: 0; z-index: 200;
}
header {
  background: var(--white);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}
.nav-inner {
  max-width: var(--max-w); margin: 0 auto; padding: 0 32px;
  display: flex; align-items: center; gap: 32px; height: 70px;
}
.logo { display: flex; align-items: center; gap: 10px; flex-shrink: 0; text-decoration: none; }
.logo-icon {
  width: 38px; height: 38px; border-radius: 50%;
  background: linear-gradient(135deg, var(--blue), #60A5FA);
  display: flex; align-items: center; justify-content: center;
  font-size: 18px; font-weight: 800; color: var(--white); flex-shrink: 0;
}
.logo-text { line-height: 1; }
.logo-text strong { font-size: 15px; font-weight: 800; color: var(--text); letter-spacing: -.03em; display: block; }
.logo-text span { font-size: 10.5px; color: var(--muted); font-weight: 500; letter-spacing: .01em; }
nav.main-nav { display: flex; align-items: center; gap: 2px; flex: 1; }
nav.main-nav a {
  font-size: 14px; font-weight: 500; color: var(--text);
  padding: 8px 14px; border-radius: var(--pill); transition: var(--transition);
  display: flex; align-items: center; gap: 5px;
}
nav.main-nav a:hover { background: var(--blue-light); color: var(--blue); }
nav.main-nav a .nav-arrow { transition: transform 0.25s ease; flex-shrink: 0; opacity: 0.55; }
nav.main-nav a:hover .nav-arrow { transform: rotate(180deg); opacity: 1; }
nav.main-nav .nav-item:hover > a .nav-arrow { transform: rotate(180deg); opacity: 1; }
nav.main-nav .nav-item:hover > a { background: var(--blue-light); color: var(--blue); }
.nav-actions { display: flex; align-items: center; gap: 14px; margin-left: auto; }

/* ─── DROPDOWN MENUS ─── */
.nav-item { position: relative; }
.nav-item::after { content: ''; position: absolute; top: 100%; left: 0; right: 0; height: 8px; }
.dropdown {
  display: none; position: absolute; top: calc(100% + 4px); left: -8px;
  background: var(--white); border-radius: var(--radius);
  box-shadow: 0 8px 32px rgba(0,0,0,.12); border: 1px solid var(--border);
  min-width: 180px; padding: 6px; z-index: 300;
}
.nav-item:hover .dropdown { display: block; }
nav.main-nav .dropdown a {
  display: block; padding: 9px 14px; border-radius: var(--radius-sm);
  font-size: 14px; font-weight: 500; color: var(--text);
  background: none;
}
nav.main-nav .dropdown a:hover { background: var(--blue-light); color: var(--blue); }
.nav-phone { font-size: 13.5px; font-weight: 600; color: var(--muted); }
.nav-phone:hover { color: var(--blue); }

/* ─── 3. BREADCRUMB ─── */
.breadcrumb {
  background: var(--blue-light);
  border-bottom: 1px solid var(--blue-mid);
  padding: 11px 0;
}
.breadcrumb .inner {
  display: flex; align-items: center; gap: 7px;
  font-size: 13px; color: var(--muted); font-weight: 500;
}
.breadcrumb a { color: var(--blue); }
.breadcrumb a:hover { text-decoration: underline; }
.breadcrumb .sep { opacity: .4; font-size: 11px; }
.breadcrumb .current { color: var(--text); }

/* ─── 4. PRODUCT HERO ─── */
.product-hero {
  max-width: var(--max-w); margin: 0 auto;
  padding: 48px 32px 64px;
  display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: start;
}
/* Gallery */
.gallery { display: flex; flex-direction: column; gap: 14px; position: sticky; top: 130px; }
.gallery-main {
  border-radius: var(--radius-lg); overflow: hidden;
  background: var(--blue-light); aspect-ratio: 1 / 1;
  cursor: zoom-in; position: relative;
}
.gallery-main img { width: 100%; height: 100%; object-fit: contain; transition: transform .4s ease; padding: 24px; }
.gallery-main:hover img { transform: scale(1.04); }
.gallery-thumbs { display: grid; grid-template-columns: repeat(5, 1fr); gap: 10px; }
.thumb {
  border-radius: var(--radius-sm); overflow: hidden;
  background: var(--blue-light); aspect-ratio: 1;
  cursor: pointer; border: 2px solid transparent; transition: var(--transition);
}
.thumb.active, .thumb:hover { border-color: var(--blue); }
.thumb img { width: 100%; height: 100%; object-fit: contain; padding: 8px; }

/* Buy Box */
.buy-box { display: flex; flex-direction: column; gap: 24px; }
.product-badges { display: flex; flex-wrap: wrap; gap: 8px; }
.badge {
  background: var(--blue-light); color: var(--blue);
  border-radius: var(--pill); padding: 5px 13px;
  font-size: 11.5px; font-weight: 700; border: 1px solid var(--blue-mid);
  letter-spacing: .02em;
}
.badge-green { background: #ECFDF5; color: #065F46; border-color: #A7F3D0; }
.badge-navy  { background: var(--navy); color: var(--white); border-color: transparent; }
.product-title { font-size: clamp(22px, 2.8vw, 34px); font-weight: 800; letter-spacing: -.04em; line-height: 1.1; }
.product-subtitle { color: var(--muted); font-size: 15.5px; font-weight: 400; line-height: 1.6; margin-top: 4px; }

/* Stars */
.rating-row { display: flex; align-items: center; gap: 10px; }
.stars { display: flex; gap: 2px; }
.star { color: var(--gold); font-size: 18px; }
.star.half { position: relative; display: inline-block; }
.rating-count { font-size: 13.5px; font-weight: 500; color: var(--blue); text-decoration: underline; }

/* Product Description */
.product-desc { font-size: 15px; color: var(--muted); line-height: 1.7; }

/* CTA Group */
.cta-group { display: flex; flex-direction: column; gap: 12px; }
.cta-group .btn { width: 100%; justify-content: center; font-size: 15px; padding: 15px 28px; }
.trust-line {
  font-size: 12.5px; color: var(--muted); display: flex; align-items: center; gap: 6px;
}
.trust-line svg { color: var(--green); }

/* Accordion Features */
.accordion { border-top: 1px solid var(--border); }
.acc-item { border-bottom: 1px solid var(--border); }
.acc-trigger {
  width: 100%; display: flex; align-items: center; justify-content: space-between;
  padding: 18px 0; background: none; border: none; cursor: pointer;
  font-size: 15px; font-weight: 600; color: var(--text); gap: 16px; text-align: left;
}
.acc-trigger:hover { color: var(--blue); }
.acc-icon {
  width: 28px; height: 28px; border-radius: 50%; border: 1.5px solid var(--border);
  display: flex; align-items: center; justify-content: center; flex-shrink: 0;
  transition: var(--transition); font-size: 16px; font-weight: 300; color: var(--muted);
}
.acc-trigger[aria-expanded="true"] .acc-icon { background: var(--blue); color: var(--white); border-color: var(--blue); transform: rotate(45deg); }
.acc-panel { display: none; padding-bottom: 18px; }
.acc-panel p { font-size: 14.5px; color: var(--muted); line-height: 1.7; }
.acc-panel.open { display: block; }

/* ─── 5. TAB NAV ─── */
.tab-nav-wrap {
  border-bottom: 2px solid var(--border);
  background: var(--white);
  position: sticky; top: 114px; z-index: 150;
}
.tab-nav {
  max-width: var(--max-w); margin: 0 auto; padding: 0 32px;
  display: flex; gap: 0; overflow-x: auto;
}
.tab-btn {
  font-size: 14px; font-weight: 600; color: var(--muted);
  padding: 17px 20px; border: none; background: none; cursor: pointer;
  border-bottom: 3px solid transparent; margin-bottom: -2px;
  transition: var(--transition); white-space: nowrap; letter-spacing: -.01em;
}
.tab-btn:hover { color: var(--blue); }
.tab-btn.active { color: var(--blue); border-bottom-color: var(--blue); }

/* Tab panels */
.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* ─── 6. FEATURES SECTION ─── */
.features-section { padding: 72px 0; }
.features-section .inner { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center; }
.features-list-wrap h2 { font-size: clamp(26px, 3vw, 38px); font-weight: 800; letter-spacing: -.04em; margin-bottom: 8px; }
.features-list { display: flex; flex-direction: column; gap: 0; margin-top: 32px; }
.feat-row {
  display: grid; grid-template-columns: 180px 1fr; gap: 24px;
  padding: 24px 0; border-bottom: 1px solid var(--border);
}
.feat-row:first-child { padding-top: 0; }
.feat-label { font-size: 14.5px; font-weight: 700; color: var(--text); letter-spacing: -.01em; }
.feat-desc { font-size: 14px; color: var(--muted); line-height: 1.65; }
.features-img {
  border-radius: var(--radius-lg); overflow: hidden;
  background: var(--blue-light);
  aspect-ratio: 4/5; display: flex; align-items: center; justify-content: center;
}
.features-img img { width: 80%; object-fit: contain; }

/* ─── 7. OPTIONS SECTION ─── */
.options-section { padding: 72px 0; background: var(--gray-50); }
.options-section h2 { font-size: clamp(24px, 2.8vw, 36px); font-weight: 800; letter-spacing: -.04em; max-width: 600px; }
.options-section p.lead { color: var(--muted); font-size: 15px; line-height: 1.7; max-width: 640px; margin-top: 14px; }
.options-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px; margin-top: 48px; }
.option-card { display: flex; flex-direction: column; gap: 10px; }
.option-icon { font-size: 26px; margin-bottom: 4px; }
.option-card h4 { font-size: 15px; font-weight: 700; color: var(--text); letter-spacing: -.02em; }
.option-card p { font-size: 13.5px; color: var(--muted); line-height: 1.65; }

/* ─── 8. GUARANTEE BANNER ─── */
.guarantee-bar {
  border-top: 1px solid var(--border); border-bottom: 1px solid var(--border);
  padding: 28px 0;
}
.guarantee-bar .inner { display: flex; align-items: flex-start; gap: 28px; }
.guarantee-icon { font-size: 40px; flex-shrink: 0; }
.guarantee-text h4 { font-size: 16px; font-weight: 700; }
.guarantee-text p { font-size: 14px; color: var(--muted); margin-top: 4px; line-height: 1.6; max-width: 680px; }

/* ─── 9. CERTIFIED BAR ─── */
.certified-bar { padding: 28px 0; border-bottom: 1px solid var(--border); }
.certified-bar .inner { display: flex; align-items: flex-start; gap: 28px; }
.cert-icon { font-size: 36px; flex-shrink: 0; }
.cert-text { max-width: 700px; }
.cert-text h4 { font-size: 15.5px; font-weight: 700; }
.cert-text p { font-size: 14px; color: var(--muted); line-height: 1.65; margin-top: 6px; }
.cert-text a { color: var(--blue); }

/* ─── 10. CTA BANNER ─── */
.cta-banner {
  background: var(--blue); color: var(--white);
  padding: 60px 0;
}
.cta-banner .inner { display: grid; grid-template-columns: 1fr auto; gap: 40px; align-items: center; }
.cta-banner h2 { font-size: clamp(24px, 2.8vw, 34px); font-weight: 800; letter-spacing: -.04em; }
.cta-banner p { font-size: 15px; opacity: .85; margin-top: 10px; line-height: 1.65; max-width: 560px; }

/* ─── 11. SAVINGS SECTION ─── */
.savings-section { padding: 72px 0; }
.savings-section h2 { font-size: clamp(26px, 3vw, 38px); font-weight: 800; letter-spacing: -.04em; }
.savings-section > .inner > p { font-size: 15px; color: var(--muted); max-width: 520px; margin-top: 12px; line-height: 1.7; }
.savings-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 40px; }
.savings-card {
  border-radius: var(--radius-lg); padding: 32px 28px;
  display: flex; flex-direction: column; gap: 12px;
}
.savings-card.dark { background: var(--navy); color: var(--white); }
.savings-card.teal { background: var(--teal); color: var(--white); }
.savings-card.blue { background: var(--blue); color: var(--white); }
.savings-card .stat { font-size: 42px; font-weight: 800; letter-spacing: -.05em; }
.savings-card p { font-size: 14px; opacity: .85; line-height: 1.6; }

/* ─── 12. MORE REASONS ─── */
.reasons-section { padding: 72px 0; }
.reasons-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.reasons-text h2 { font-size: clamp(26px, 3vw, 40px); font-weight: 800; letter-spacing: -.04em; line-height: 1.1; }
.reasons-img { border-radius: var(--radius-lg); overflow: hidden; }
.reasons-img img { width: 100%; height: 420px; object-fit: cover; }
.reasons-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; margin-top: 40px; }
.reason-item { display: flex; flex-direction: column; gap: 8px; }
.reason-num { font-size: 13px; font-weight: 700; color: var(--blue); letter-spacing: .06em; }
.reason-item h4 { font-size: 16px; font-weight: 700; letter-spacing: -.02em; }
.reason-item p { font-size: 13.5px; color: var(--muted); line-height: 1.65; }

/* ─── 13. ENVIRONMENTAL ─── */
.env-section { padding: 72px 0; background: var(--gray-50); }
.env-section h2 { font-size: clamp(26px, 3vw, 36px); font-weight: 800; letter-spacing: -.04em; text-align: center; margin-bottom: 48px; }
.env-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px; }
.env-card { display: flex; flex-direction: column; align-items: center; text-align: center; gap: 14px; }
.env-icon-wrap {
  width: 68px; height: 68px; border-radius: 50%;
  border: 2px solid var(--blue-mid); background: var(--blue-light);
  display: flex; align-items: center; justify-content: center; font-size: 28px;
}
.env-card h4 { font-size: 15.5px; font-weight: 700; letter-spacing: -.02em; }
.env-card p { font-size: 13.5px; color: var(--muted); line-height: 1.65; }

/* ─── 14. SPECIFICATIONS ─── */
.specs-section { padding: 72px 0; }
.section-acc { border-top: 2px solid var(--border); }
.section-acc-item { border-bottom: 1px solid var(--border); }
.section-acc-trigger {
  width: 100%; display: flex; align-items: center; justify-content: space-between;
  padding: 28px 0; background: none; border: none; cursor: pointer;
  font-size: 20px; font-weight: 700; letter-spacing: -.03em;
  transition: var(--transition);
}
.section-acc-trigger svg { transition: transform .25s; flex-shrink: 0; }
.section-acc-trigger[aria-expanded="true"] svg { transform: rotate(180deg); }
.section-acc-panel { display: none; padding-bottom: 40px; }
.section-acc-panel.open { display: block; }

/* Tables */
.spec-table-wrap { overflow-x: auto; margin-top: 20px; border-radius: var(--radius); border: 1px solid var(--border); }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
thead th {
  background: var(--blue); color: var(--white);
  padding: 13px 18px; font-weight: 700; text-align: left; font-size: 13px;
  letter-spacing: -.01em;
}
thead th:first-child { border-radius: var(--radius-sm) 0 0 0; }
thead th:last-child { border-radius: 0 var(--radius-sm) 0 0; }
tbody tr { border-bottom: 1px solid var(--border); }
tbody tr:last-child { border-bottom: none; }
tbody tr:nth-child(even) { background: var(--gray-50); }
tbody td { padding: 13px 18px; color: var(--text); font-size: 14px; }
tbody td:first-child { font-weight: 600; }
.table-subtitle {
  font-size: 13px; color: var(--muted); margin-top: 10px; font-style: italic;
}

.specs-warranty h4 { font-size: 15px; font-weight: 700; margin-bottom: 12px; }
.specs-warranty ul { display: flex; flex-direction: column; gap: 7px; }
.specs-warranty li { font-size: 14px; color: var(--muted); padding-left: 16px; position: relative; }
.specs-warranty li::before { content: '•'; position: absolute; left: 0; color: var(--blue); }
.specs-warranty .dl-link { color: var(--blue); font-size: 14px; font-weight: 600; margin-top: 14px; display: inline-flex; align-items: center; gap: 5px; }

/* Dimension tabs */
.dim-tabs { display: flex; gap: 4px; border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; margin-bottom: 24px; }
.dim-tab { flex: 1; padding: 12px; text-align: center; font-size: 14px; font-weight: 600; background: var(--gray-50); color: var(--muted); cursor: pointer; transition: var(--transition); border: none; }
.dim-tab.active { background: var(--blue); color: var(--white); }
.dim-tab:hover:not(.active) { background: var(--blue-light); color: var(--blue); }
.dim-table-wrap { display: none; }
.dim-table-wrap.active { display: block; }

/* ─── 15. INSTALLATION ─── */
.install-section { padding: 72px 0; background: var(--gray-50); }
.install-section h2 { font-size: clamp(22px, 2.5vw, 30px); font-weight: 800; letter-spacing: -.04em; margin-bottom: 10px; }
.install-section > .inner > p { font-size: 15px; color: var(--muted); max-width: 640px; line-height: 1.7; }
.install-icons { display: grid; grid-template-columns: repeat(4, 1fr); gap: 36px; margin-top: 44px; }
.install-item { display: flex; flex-direction: column; gap: 10px; }
.install-icon { font-size: 32px; }
.install-item h4 { font-size: 15px; font-weight: 700; letter-spacing: -.02em; }
.install-item p { font-size: 13.5px; color: var(--muted); line-height: 1.65; }
.install-visual { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center; margin-top: 56px; background: var(--white); border-radius: var(--radius-lg); padding: 40px; box-shadow: var(--shadow); }
.install-visual img { width: 100%; height: 260px; object-fit: cover; border-radius: var(--radius); }
.install-visual-text h3 { font-size: 22px; font-weight: 800; letter-spacing: -.04em; margin-bottom: 10px; }
.install-visual-text p { font-size: 14.5px; color: var(--muted); line-height: 1.7; }
.install-visual-text a { color: var(--blue); font-weight: 600; margin-top: 14px; display: inline-flex; align-items: center; gap: 5px; }

/* ─── 16-17. Q&A and REVIEWS ─── */
.qa-section { padding: 72px 0; }

/* ─── 18. LETS GET STARTED ─── */
.get-started {
  display: grid; grid-template-columns: 1fr 1fr; gap: 0;
  overflow: hidden; border-radius: 0;
}
.get-started-text {
  background: var(--gray-50); padding: 72px 64px;
  display: flex; flex-direction: column; gap: 20px; justify-content: center;
}
.get-started-text h2 { font-size: clamp(26px, 3vw, 38px); font-weight: 800; letter-spacing: -.04em; }
.get-started-text p { font-size: 15px; color: var(--muted); line-height: 1.7; max-width: 380px; }
.get-started-img { position: relative; min-height: 400px; }
.get-started-img img { width: 100%; height: 100%; object-fit: cover; }

/* ─── 19. YOU MAY ALSO LIKE ─── */
.related-section { padding: 72px 0; background: var(--gray-50); }
.related-section h2 { font-size: clamp(24px, 2.5vw, 32px); font-weight: 800; letter-spacing: -.04em; }
.related-section > .inner > p { font-size: 14.5px; color: var(--muted); margin-top: 8px; }
.related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 36px; }
.product-card {
  background: var(--white); border-radius: var(--radius-lg);
  border: 1px solid var(--border); overflow: hidden;
  transition: var(--transition); display: flex; flex-direction: column;
}
.product-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-2px); }
.card-img {
  background: var(--blue-light); aspect-ratio: 4/3;
  display: flex; align-items: center; justify-content: center; padding: 24px;
}
.card-img img { max-height: 160px; object-fit: contain; }
.card-body { padding: 20px; flex: 1; display: flex; flex-direction: column; gap: 8px; }
.card-tag { font-size: 11px; font-weight: 700; color: var(--blue); letter-spacing: .05em; text-transform: uppercase; }
.card-body h4 { font-size: 15.5px; font-weight: 700; letter-spacing: -.02em; }
.card-body p { font-size: 13.5px; color: var(--muted); line-height: 1.6; flex: 1; }
.card-footer { padding: 0 20px 20px; display: flex; align-items: center; justify-content: space-between; }
.card-arrow { width: 36px; height: 36px; border-radius: 50%; background: var(--blue-light); color: var(--blue); display: flex; align-items: center; justify-content: center; font-size: 16px; transition: var(--transition); }
.card-arrow:hover { background: var(--blue); color: var(--white); }
.badge-pill { background: var(--blue); color: var(--white); border-radius: var(--pill); padding: 4px 12px; font-size: 11px; font-weight: 700; }

/* ─── 20. FREQUENTLY BOUGHT TOGETHER ─── */
.fbt-section { padding: 72px 0; }
.fbt-section h2 { font-size: clamp(24px, 2.5vw, 32px); font-weight: 800; letter-spacing: -.04em; }
.fbt-section > .inner > p { font-size: 14.5px; color: var(--muted); margin-top: 8px; }

/* ─── DISCLAIMERS ─── */
.disclaimers { padding: 32px 0; border-top: 1px solid var(--border); }
.disclaimers p { font-size: 12px; color: var(--muted); line-height: 1.7; max-width: 860px; margin-top: 4px; }

/* ─── FOOTER ─── */
footer { background: var(--blue); color: var(--white); padding: 60px 0 0; }
.footer-top {
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 56px;
  padding-bottom: 48px; border-bottom: 1px solid rgba(255,255,255,.12);
}
.footer-brand { display: flex; flex-direction: column; gap: 16px; }
.footer-logo { display: flex; align-items: center; gap: 10px; }
.footer-logo-icon {
  width: 36px; height: 36px; border-radius: 50%; background: rgba(255,255,255,.15);
  display: flex; align-items: center; justify-content: center; font-size: 16px; font-weight: 800;
}
.footer-logo-text strong { font-size: 15px; font-weight: 800; display: block; color: var(--white); }
.footer-logo-text span { font-size: 10px; opacity: .7; }
.footer-brand p { font-size: 14px; opacity: .7; line-height: 1.7; max-width: 260px; }
.footer-cta {
  background: rgba(255,255,255,.1); border-radius: var(--radius); padding: 20px;
  display: flex; flex-direction: column; gap: 12px;
}
.footer-cta h4 { font-size: 14px; font-weight: 700; }
.footer-cta p { font-size: 13px; opacity: .75; line-height: 1.6; }
.footer-col h4 { font-size: 13.5px; font-weight: 700; margin-bottom: 16px; letter-spacing: .01em; }
.footer-col ul { display: flex; flex-direction: column; gap: 10px; }
.footer-col a { font-size: 14px; opacity: .75; transition: var(--transition); }
.footer-col a:hover { opacity: 1; }
.footer-bottom {
  padding: 24px 0;
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 12px;
}
.footer-bottom p { font-size: 13px; opacity: .6; }
.footer-links { display: flex; gap: 24px; flex-wrap: wrap; }
.footer-links a { font-size: 13px; opacity: .6; transition: var(--transition); }
.footer-links a:hover { opacity: 1; }
.social-row { display: flex; gap: 10px; }
.social-btn {
  width: 36px; height: 36px; border-radius: 50%;
  background: rgba(255,255,255,.12); display: flex; align-items: center; justify-content: center;
  font-size: 16px; transition: var(--transition); text-decoration: none;
}
.social-btn:hover { background: rgba(255,255,255,.25); }

/* ─── TESTIMONIAL CAROUSEL ─── */
.testimonial-section {
  padding: 80px 0;
  background: var(--navy);
  overflow: hidden;
}
.testimonial-section .section-header {
  text-align: center;
  margin-bottom: 48px;
}
.testimonial-section .tag {
  color: rgba(255,255,255,0.7);
}
.testimonial-section .tag::before { background: rgba(255,255,255,0.7); }
.testimonial-section h2 {
  font-size: clamp(26px, 3vw, 36px);
  font-weight: 800;
  letter-spacing: -.04em;
  color: var(--white);
  margin-top: 10px;
}
.carousel-track-wrap {
  position: relative;
  overflow: hidden;
}
.carousel-track {
  display: flex;
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}
.carousel-slide {
  min-width: 100%;
  padding: 0 32px;
  box-sizing: border-box;
}
.testimonial-card-carousel {
  max-width: 760px;
  margin: 0 auto;
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 24px;
  padding: 44px 48px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}
.t-stars { color: #FCD34D; font-size: 20px; letter-spacing: 3px; }
.t-quote {
  font-size: 17px;
  line-height: 1.75;
  color: rgba(255,255,255,0.95);
  font-style: italic;
  font-weight: 400;
}
.t-author {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-top: 4px;
}
.t-avatar {
  width: 44px; height: 44px;
  border-radius: 50%;
  background: rgba(255,255,255,0.2);
  display: flex; align-items: center; justify-content: center;
  font-size: 17px; font-weight: 800; color: var(--white);
  flex-shrink: 0;
}
.t-name { font-size: 15px; font-weight: 700; color: var(--white); }
.t-location { font-size: 13px; color: rgba(255,255,255,0.6); margin-top: 2px; }
.carousel-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-top: 40px;
}
.carousel-btn {
  width: 44px; height: 44px;
  border-radius: 50%;
  background: rgba(255,255,255,0.15);
  border: 1px solid rgba(255,255,255,0.25);
  color: var(--white);
  font-size: 18px;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: var(--transition);
  line-height: 1;
}
.carousel-btn:hover { background: rgba(255,255,255,0.28); }
.carousel-dots {
  display: flex;
  gap: 8px;
  align-items: center;
}
.carousel-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: rgba(255,255,255,0.35);
  cursor: pointer;
  transition: var(--transition);
  border: none;
  padding: 0;
}
.carousel-dot.active {
  background: var(--white);
  width: 24px;
  border-radius: 4px;
}

/* ─── MOBILE NAV ─── */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  background: none;
  border: none;
  padding: 8px 4px;
  cursor: pointer;
  flex-shrink: 0;
  margin-left: auto;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: var(--transition);
}
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.mobile-nav-overlay {
  position: fixed; inset: 0; z-index: 500;
  background: rgba(0,0,0,0.5);
  opacity: 0; visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}
.mobile-nav-overlay.open { opacity: 1; visibility: visible; }

.mobile-nav-drawer {
  position: absolute; top: 0; right: 0; bottom: 0;
  width: min(340px, 88vw);
  background: var(--white);
  display: flex; flex-direction: column;
  transform: translateX(100%);
  transition: transform 0.3s cubic-bezier(0.4,0,0.2,1);
  overflow-y: auto;
  box-shadow: -8px 0 40px rgba(0,0,0,0.18);
}
.mobile-nav-overlay.open .mobile-nav-drawer { transform: translateX(0); }

.mobile-nav-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.mobile-nav-close {
  background: none; border: none; cursor: pointer;
  padding: 6px; color: var(--text);
  display: flex; align-items: center; justify-content: center;
  border-radius: var(--radius-sm); transition: var(--transition);
}
.mobile-nav-close:hover { background: var(--gray-100); }

.mobile-nav-links { flex: 1; overflow-y: auto; }
.mobile-nav-group { border-bottom: 1px solid var(--border); padding: 8px 0; }
.mobile-nav-group:last-child { border-bottom: none; }
.mobile-nav-group-label {
  font-size: 11px; font-weight: 700; letter-spacing: .08em;
  text-transform: uppercase; color: var(--muted);
  padding: 10px 24px 4px;
}
.mobile-nav-links a {
  display: block; padding: 12px 24px;
  font-size: 15px; font-weight: 500; color: var(--text);
  transition: var(--transition); text-decoration: none;
}
.mobile-nav-links a:hover { background: var(--blue-light); color: var(--blue); }

.mobile-nav-footer {
  padding: 20px 24px; border-top: 1px solid var(--border);
  display: flex; flex-direction: column; gap: 10px; flex-shrink: 0;
}

/* ─── RESPONSIVE ─── */
@media (max-width: 900px) {
  .product-hero { grid-template-columns: 1fr; gap: 40px; }
  .gallery { position: static; }
  .features-section .inner { grid-template-columns: 1fr; }
  .options-grid { grid-template-columns: repeat(2, 1fr); }
  .savings-cards { grid-template-columns: 1fr; }
  .reasons-inner { grid-template-columns: 1fr; }
  .reasons-img { display: none; }
  .env-grid { grid-template-columns: 1fr; }
  .install-icons { grid-template-columns: repeat(2, 1fr); }
  .install-visual { grid-template-columns: 1fr; }
  .get-started { grid-template-columns: 1fr; }
  .get-started-img { min-height: 280px; }
  .get-started-text { padding: 48px 40px; }
  .related-grid { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr 1fr; gap: 36px; }
  .cta-banner .inner { grid-template-columns: 1fr; }
  .feat-row { grid-template-columns: 1fr; gap: 6px; }
}

/* ─── Hamburger breakpoint ─── */
@media (max-width: 768px) {
  .nav-toggle { display: flex; }
  nav.main-nav { display: none; }
  .nav-actions { display: none; }
  /* Tab nav: offset just the header height since announce bar may wrap */
  .tab-nav-wrap { top: 70px; }
}

@media (max-width: 600px) {
  .inner { padding: 0 20px; }
  .announce-bar { font-size: 12px; padding: 10px 20px; }
  .footer-top { grid-template-columns: 1fr; }
  .options-grid { grid-template-columns: 1fr; }
  .savings-cards { grid-template-columns: 1fr; }
  .reasons-grid { grid-template-columns: 1fr; }
  .gallery-thumbs { grid-template-columns: repeat(4, 1fr); }
  .get-started-text { padding: 36px 24px; }
  .testimonial-card-carousel { padding: 28px 20px; }
  .t-quote { font-size: 15px; }
  .install-icons { grid-template-columns: 1fr; }
}

/* ─── PRODUCT SVG PLACEHOLDER ─── */
.tank-svg { display: block; width: 100%; height: 100%; }