/* ============================================
   UnderCovers Curacao — styles.css
   ============================================ */

/* --- Reset & Base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --navy:       #0d3b6e;
  --teal:       #1D9E75;
  --teal-light: #25b887;
  --white:      #ffffff;
  --off-white:  #f8f7f4;
  --cream:      #f2f0ec;
  --gray-100:   #f0efeb;
  --gray-200:   #e4e2dc;
  --gray-400:   #a8a49a;
  --gray-600:   #6b6760;
  --gray-800:   #2e2c28;
  --text:       #1a1917;
  --font:       'Inter', sans-serif;
  --transition: 0.3s ease;
  --radius:     12px;
  --shadow:     0 4px 24px rgba(13,59,110,0.08);
  --shadow-lg:  0 12px 48px rgba(13,59,110,0.14);
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  overflow-x: hidden;
}

body {
  font-family: var(--font);
  background: var(--off-white);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font: inherit; }

/* --- Typography --- */
h1, h2, h3, h4 {
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--navy);
}

h1 { font-size: clamp(2rem, 5.5vw, 4.2rem); }
h2 { font-size: clamp(1.7rem, 3.5vw, 2.8rem); }
h3 { font-size: clamp(1.05rem, 2vw, 1.4rem); }

p {
  color: var(--gray-600);
  line-height: 1.75;
  font-size: 1rem;
}

.section-label {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: 1rem;
}

/* --- Layout --- */
.container {
  width: 100%;
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

section { padding: 6rem 0; }

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.75rem;
  min-height: 48px;
  border-radius: 50px;
  font-size: 0.95rem;
  font-weight: 600;
  transition: all var(--transition);
  white-space: nowrap;
  -webkit-tap-highlight-color: transparent;
}

.btn-primary {
  background: var(--teal);
  color: var(--white);
  box-shadow: 0 4px 16px rgba(29,158,117,0.3);
}
.btn-primary:hover {
  background: var(--teal-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(29,158,117,0.4);
}
.btn-primary:active { transform: translateY(0); }

.btn-outline {
  background: transparent;
  color: var(--white);
  border: 2px solid rgba(255,255,255,0.6);
}
.btn-outline:hover {
  background: rgba(255,255,255,0.12);
  border-color: var(--white);
}

.btn-outline-dark {
  background: transparent;
  color: var(--navy);
  border: 2px solid var(--navy);
}
.btn-outline-dark:hover {
  background: var(--navy);
  color: var(--white);
}

/* ============================================
   NAVIGATION
   ============================================ */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 1rem 0;
  transition: background var(--transition), box-shadow var(--transition), padding var(--transition);
}

.nav.scrolled {
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 var(--gray-200);
  padding: 0.6rem 0;
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.nav-logo img {
  height: 80px;
  width: auto;
  filter: brightness(0) invert(1);
  transition: opacity var(--transition), filter var(--transition);
  background: transparent;
}

.nav.scrolled .nav-logo img {
  filter: none;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}

.nav-links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--white);
  transition: color var(--transition), opacity var(--transition);
  opacity: 0.85;
  padding: 0.5rem 0;
  min-height: 44px;
  display: flex;
  align-items: center;
}
.nav-links a:hover { opacity: 1; }
.nav.scrolled .nav-links a { color: var(--navy); }
.nav.scrolled .nav-links a:hover { color: var(--teal); }

.nav-cta {
  font-size: 0.85rem;
  padding: 0.6rem 1.2rem;
  min-height: 44px;
  flex-shrink: 0;
}

.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 10px 8px;
  min-width: 44px;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  -webkit-tap-highlight-color: transparent;
}
.nav-hamburger span {
  display: block;
  width: 24px; height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: all var(--transition);
}
.nav.scrolled .nav-hamburger span { background: var(--navy); }

/* Mobile nav */
@media (max-width: 768px) {
  .nav-logo img { height: 56px; }
  .nav-links {
    display: none;
    position: absolute;
    top: 100%; left: 0; right: 0;
    background: var(--white);
    flex-direction: column;
    align-items: flex-start;
    padding: 1.25rem 1.5rem 1.75rem;
    gap: 0.25rem;
    box-shadow: var(--shadow-lg);
  }
  .nav-links.open { display: flex; }
  .nav-links a {
    color: var(--navy);
    font-size: 1rem;
    width: 100%;
    padding: 0.75rem 0;
    min-height: 44px;
    border-bottom: 1px solid var(--gray-100);
  }
  .nav-links a:last-of-type { border-bottom: none; }
  .nav-cta { display: none; }
  .nav-hamburger { display: flex; }
  .nav-mobile-cta {
    display: flex !important;
    margin-top: 0.75rem;
    width: 100%;
    border-bottom: none !important;
  }
  .nav-mobile-cta .btn {
    width: 100%;
    justify-content: center;
    padding: 0.85rem;
  }
}
@media (min-width: 769px) {
  .nav-mobile-cta { display: none; }
}

/* ============================================
   HERO
   ============================================ */
.hero {
  position: relative;
  min-height: 100svh;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-bottom: 7rem;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('images/gallery-5.jpg');
  background-size: cover;
  background-position: center 30%;
  transform: scale(1.04);
  transition: transform 8s ease-out;
}
.hero-bg.loaded { transform: scale(1); }

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to top,
    rgba(13,59,110,0.62) 0%,
    rgba(13,59,110,0.22) 45%,
    rgba(13,59,110,0.04) 100%
  );
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 720px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.25);
  backdrop-filter: blur(8px);
  border-radius: 50px;
  padding: 0.4rem 1rem;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.9);
  margin-bottom: 1.5rem;
}

.hero h1 {
  color: var(--white);
  margin-bottom: 1.25rem;
}
.hero h1 span { color: var(--teal-light); }

.hero-sub {
  color: rgba(255,255,255,0.82);
  font-size: clamp(1rem, 2vw, 1.2rem);
  max-width: 520px;
  margin-bottom: 2.5rem;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
}

.hero-scroll {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  color: rgba(255,255,255,0.5);
  animation: bounce 2s infinite;
}
.hero-scroll svg { opacity: 0.5; }

@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50%       { transform: translateX(-50%) translateY(6px); }
}

/* ============================================
   WHY UNDERCOVERS
   ============================================ */
.why { background: var(--white); }

.why-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: center;
}

.why-image-block { position: relative; }

.why-img-main {
  width: 100%;
  border-radius: var(--radius);
  object-fit: cover;
  aspect-ratio: 4/5;
}

.why-content h2 { margin-bottom: 1.25rem; }
.why-content > p { margin-bottom: 2.5rem; font-size: 1.05rem; }

.benefits {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.benefit {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}

.benefit-icon {
  flex-shrink: 0;
  width: 44px; height: 44px;
  border-radius: 10px;
  background: var(--gray-100);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--teal);
  margin-top: 2px;
}

.benefit h4 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--navy);
  margin-bottom: 0.25rem;
}
.benefit p {
  font-size: 0.88rem;
  line-height: 1.65;
  color: var(--gray-600);
}

/* Before/After strip */
.before-after {
  background: var(--cream);
  padding: 4rem 0;
}

.ba-label {
  text-align: center;
  margin-bottom: 2rem;
}

.ba-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  max-width: 860px;
  margin: 0 auto;
}

.ba-card {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
}

.ba-card img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
}

.ba-tag {
  position: absolute;
  bottom: 1rem;
  left: 1rem;
  background: var(--white);
  color: var(--navy);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.3rem 0.75rem;
  border-radius: 50px;
}

/* ============================================
   BEFORE & AFTER (dedicated section)
   ============================================ */
.beforeafter { background: var(--white); }

.beforeafter-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  max-width: 960px;
  margin: 0 auto;
}

.beforeafter-item {
  display: flex;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.beforeafter-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top;
  display: block;
}

/* ============================================
   PRODUCTS
   ============================================ */
.products { background: var(--off-white); }

.section-header {
  text-align: center;
  max-width: 560px;
  margin: 0 auto 4rem;
}
.section-header h2 { margin-bottom: 0.75rem; }
.section-header p { font-size: 1.05rem; }

.products-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.product-card {
  background: var(--white);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform var(--transition), box-shadow var(--transition);
  display: flex;
  flex-direction: column;
}
.product-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.product-card-badge {
  display: block;
  background: var(--navy);
  color: var(--white);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-align: center;
  padding: 0.5rem;
}
.product-card-badge.featured { background: var(--teal); }

.product-card-img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
  object-position: center;
  background: var(--gray-100);
}

.product-card-body {
  padding: 1.5rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.product-card-body h3 {
  font-size: 1.2rem;
  margin-bottom: 0.25rem;
}

.product-btu {
  font-size: 0.82rem;
  color: var(--teal);
  font-weight: 600;
  margin-bottom: 1rem;
}

.product-dims {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  margin-bottom: 1.25rem;
}

.product-dim-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
}
.product-dim-row span:first-child { color: var(--gray-400); }
.product-dim-row span:last-child { font-weight: 500; color: var(--gray-800); }

.product-divider {
  height: 1px;
  background: var(--gray-200);
  margin: 1rem 0;
}

.product-price {
  display: flex;
  align-items: baseline;
  gap: 0.4rem;
  margin-bottom: 1.25rem;
}
.product-price-amount {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--navy);
}

.product-card-body .btn {
  margin-top: auto;
  width: 100%;
}

.measure-hint {
  margin-top: 3rem;
  background: var(--white);
  border-radius: var(--radius);
  padding: 2rem;
  display: flex;
  gap: 2rem;
  align-items: center;
  box-shadow: var(--shadow);
}
.measure-hint img {
  width: 225px;
  flex-shrink: 0;
  border-radius: 8px;
}
.measure-hint-text h4 {
  font-size: 1rem;
  margin-bottom: 0.5rem;
}
.measure-hint-text p { font-size: 0.9rem; }
.measure-hint-text a {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  color: var(--teal);
  font-weight: 600;
  font-size: 0.9rem;
  margin-top: 0.75rem;
  transition: gap var(--transition);
  min-height: 44px;
}
.measure-hint-text a:hover { gap: 0.55rem; }

/* ============================================
   INSTALLATION
   ============================================ */
.installation { background: var(--navy); color: var(--white); }
.installation .section-label { color: var(--teal-light); }
.installation .section-header h2 { color: var(--white); }
.installation .section-header p { color: rgba(255,255,255,0.65); }

.install-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  max-width: 720px;
  margin: 0 auto;
}

.install-card {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius);
  overflow: hidden;
  transition: background var(--transition);
}
.install-card:hover { background: rgba(255,255,255,0.1); }

.install-card-img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
  opacity: 0.9;
}

.install-card-body { padding: 1.5rem; }

.install-card-body h3 {
  color: var(--white);
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
}

.install-card-body > p {
  color: rgba(255,255,255,0.6);
  font-size: 0.88rem;
  margin-bottom: 1.25rem;
}

.install-components { display: flex; flex-direction: column; gap: 0.5rem; }

.install-component {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.8);
}

.install-component::before {
  content: '';
  display: block;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--teal);
  flex-shrink: 0;
}

.install-excluded { color: rgba(255,255,255,0.35) !important; }
.install-excluded::before { background: rgba(255,255,255,0.2) !important; }

.install-footer {
  margin-top: 3.5rem;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius);
  padding: 1.75rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.install-footer-text h4 { color: var(--white); font-size: 1rem; margin-bottom: 0.25rem; }
.install-footer-text p { color: rgba(255,255,255,0.6); font-size: 0.88rem; }

/* ============================================
   GALLERY
   ============================================ */
.gallery { background: var(--off-white); }

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.gallery-item {
  border-radius: var(--radius);
  overflow: hidden;
  cursor: pointer;
  position: relative;
}

.gallery-item img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
  display: block;
  transition: transform 0.5s ease, filter 0.5s ease;
}

.gallery-item::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(13,59,110,0);
  transition: background 0.3s ease;
  pointer-events: none;
}

.gallery-item:hover img {
  transform: scale(1.04);
  filter: brightness(0.85);
}
.gallery-item:hover::after {
  background: rgba(13,59,110,0.15);
}

/* Lightbox */
.lightbox {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 2000;
  background: rgba(0,0,0,0.92);
  align-items: center;
  justify-content: center;
  padding: 2rem;
}
.lightbox.open { display: flex; }
.lightbox img {
  max-width: 90vw;
  max-height: 90vh;
  object-fit: contain;
  border-radius: 6px;
}
.lightbox-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  color: var(--white);
  font-size: 2.2rem;
  line-height: 1;
  cursor: pointer;
  opacity: 0.7;
  transition: opacity var(--transition);
  background: none;
  border: none;
  min-width: 44px;
  min-height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.lightbox-close:hover { opacity: 1; }

/* ============================================
   FAQ
   ============================================ */
.faq { background: var(--white); }

.faq-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  max-width: 960px;
  margin: 0 auto;
}

.faq-item {
  background: var(--off-white);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--gray-200);
  transition: border-color var(--transition);
}
.faq-item.open { border-color: var(--teal); }

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.15rem 1.25rem;
  min-height: 56px;
  text-align: left;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--navy);
  transition: color var(--transition);
  -webkit-tap-highlight-color: transparent;
}
.faq-question:hover { color: var(--teal); }

.faq-icon {
  flex-shrink: 0;
  width: 24px; height: 24px;
  border-radius: 50%;
  background: var(--gray-200);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition), transform var(--transition);
  color: var(--navy);
  font-size: 1.1rem;
  line-height: 1;
}
.faq-item.open .faq-icon {
  background: var(--teal);
  color: var(--white);
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s ease;
  padding: 0 1.25rem;
}
.faq-item.open .faq-answer {
  max-height: 400px;
  padding: 0 1.25rem 1.25rem;
}
.faq-answer p {
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--gray-600);
}

/* ============================================
   CONTACT
   ============================================ */
.contact { background: var(--cream); }

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: center;
}

.contact-content h2 { margin-bottom: 0.75rem; }
.contact-content > p {
  font-size: 1.05rem;
  margin-bottom: 2.5rem;
}

.contact-methods {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.contact-method {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.25rem;
  min-height: 64px;
  background: var(--white);
  border-radius: var(--radius);
  transition: box-shadow var(--transition), transform var(--transition);
  text-decoration: none;
  -webkit-tap-highlight-color: transparent;
}
.contact-method:hover {
  box-shadow: var(--shadow);
  transform: translateX(4px);
}

.contact-method-icon {
  width: 44px; height: 44px;
  border-radius: 10px;
  background: var(--gray-100);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-method-info { flex: 1; min-width: 0; }
.contact-method-info span {
  display: block;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--gray-400);
  margin-bottom: 0.15rem;
}
.contact-method-info strong {
  font-size: 0.9rem;
  color: var(--navy);
  font-weight: 600;
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.contact-method-arrow {
  color: var(--gray-400);
  font-size: 1.1rem;
  transition: color var(--transition);
  flex-shrink: 0;
}
.contact-method:hover .contact-method-arrow { color: var(--teal); }

.contact-visual { position: relative; }
.contact-visual img {
  width: 100%;
  border-radius: var(--radius);
  aspect-ratio: 4/5;
  object-fit: cover;
}

.contact-visual-badge {
  position: absolute;
  bottom: -1.5rem;
  left: -1.5rem;
  background: var(--teal);
  color: var(--white);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  box-shadow: var(--shadow-lg);
}
.contact-visual-badge strong {
  display: block;
  font-size: 1.4rem;
  font-weight: 700;
}
.contact-visual-badge span {
  font-size: 0.8rem;
  opacity: 0.85;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
  background: var(--navy);
  color: rgba(255,255,255,0.65);
  padding: 3rem 0 2rem;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 2rem;
  flex-wrap: wrap;
}

.footer-brand img {
  height: 40px;
  margin-bottom: 0.75rem;
  filter: brightness(10);
  background: transparent;
}
.footer-brand p {
  font-size: 0.85rem;
  max-width: 260px;
  line-height: 1.6;
  color: rgba(255,255,255,0.6);
}

.footer-links-group h5 {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--white);
  margin-bottom: 1rem;
}
.footer-links-group a {
  display: block;
  font-size: 0.88rem;
  color: rgba(255,255,255,0.6);
  margin-bottom: 0.6rem;
  transition: color var(--transition);
  padding: 0.2rem 0;
}
.footer-links-group a:hover { color: var(--white); }

.footer-divider {
  height: 1px;
  background: rgba(255,255,255,0.1);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  font-size: 0.8rem;
  color: rgba(255,255,255,0.45);
}

.footer-bottom a { color: rgba(255,255,255,0.5); transition: color var(--transition); }
.footer-bottom a:hover { color: var(--white); }

/* ============================================
   FLOATING WHATSAPP
   ============================================ */
.whatsapp-float {
  position: fixed;
  bottom: 1.75rem;
  right: 1.75rem;
  z-index: 900;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: #25D366;
  color: var(--white);
  padding: 0.85rem 1.3rem;
  border-radius: 50px;
  box-shadow: 0 4px 20px rgba(37,211,102,0.45);
  font-weight: 600;
  font-size: 0.88rem;
  transition: transform var(--transition), box-shadow var(--transition);
  text-decoration: none;
  -webkit-tap-highlight-color: transparent;
}
.whatsapp-float:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 28px rgba(37,211,102,0.55);
}
.whatsapp-float svg { flex-shrink: 0; }

/* ============================================
   ANIMATIONS
   ============================================ */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.stagger > * { transition-delay: calc(var(--i, 0) * 80ms); }

/* ============================================
   RESPONSIVE — 1024px
   ============================================ */
@media (max-width: 1024px) {
  .why-grid { gap: 3rem; }
  .products-grid { grid-template-columns: repeat(2, 1fr); }
  .install-grid { grid-template-columns: repeat(2, 1fr); }
  .gallery-grid { grid-template-columns: repeat(2, 1fr); }
}

/* ============================================
   RESPONSIVE — 768px (tablet/mobile)
   ============================================ */
@media (max-width: 768px) {
  section { padding: 3.5rem 0; }

  /* Hero image swap */
  .hero-bg {
    background-image: url('images/gallery-3.png');
    background-position: center center;
  }

  /* Why */
  .why-grid { grid-template-columns: 1fr; gap: 2rem; }
  .why-image-block { display: block; }
  .why-img-main { aspect-ratio: 4/3; }
  .why-content > p { font-size: 1rem; }
  .benefit p { font-size: 0.95rem; }

  /* Before/After */
  .ba-grid { grid-template-columns: 1fr; max-width: 420px; }
  .beforeafter-grid { grid-template-columns: 1fr; max-width: 480px; }

  /* Products */
  .products-grid { grid-template-columns: 1fr; max-width: 420px; margin: 0 auto; }
  .product-dim-row { font-size: 0.95rem; }
  .product-btu { font-size: 0.9rem; }

  /* Installation readability */
  .install-card-body > p { font-size: 0.95rem; }
  .install-component { font-size: 0.95rem; }
  .install-footer-text p { font-size: 0.95rem; }

  /* Installation */
  .install-grid { grid-template-columns: 1fr; }
  .install-footer { flex-direction: column; align-items: flex-start; }
  .install-footer .btn { width: 100%; }

  /* Gallery: always 2 columns on mobile */
  .gallery-grid { grid-template-columns: repeat(2, 1fr); gap: 0.75rem; }

  /* FAQ */
  .faq-grid { grid-template-columns: 1fr; }

  /* Contact */
  .contact-grid { grid-template-columns: 1fr; gap: 2rem; }
  .contact-visual { display: none; }

  /* Measure hint */
  .measure-hint { flex-direction: column; gap: 1.25rem; }
  .measure-hint img { width: 100%; max-width: 320px; margin: 0 auto; }
  .measure-hint-text p { font-size: 0.95rem; }

  /* FAQ readability */
  .faq-answer p { font-size: 0.95rem; }

  /* Contact readability */
  .contact-method-info strong { font-size: 0.95rem; }

  /* Footer */
  .footer-top { flex-direction: column; gap: 2rem; }

  /* WhatsApp float: icon-only pill on mobile */
  .whatsapp-float span { display: none; }
  .whatsapp-float {
    padding: 0.95rem;
    border-radius: 50%;
    bottom: 1.25rem;
    right: 1.25rem;
  }
}

/* ============================================
   RESPONSIVE — 480px (small phones)
   ============================================ */
@media (max-width: 480px) {
  .container { padding: 0 1.5rem; }

  /* Hero — sit in upper-center area, not bottom */
  .hero { padding-top: 5.5rem; padding-bottom: 6rem; align-items: center; }
  .hero-content { padding-bottom: 0; }
  .hero h1 { font-size: clamp(1.9rem, 8.5vw, 2.4rem); }
  .hero-sub { font-size: 1rem; margin-bottom: 2rem; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .hero-actions .btn { width: 100%; justify-content: center; }
  .hero-badge { font-size: 0.75rem; }

  /* Products full-width */
  .products-grid { max-width: 100%; }

  /* Gallery stays 2-col even on small phones */
  .gallery-grid { grid-template-columns: repeat(2, 1fr); gap: 0.5rem; }
  .gallery-item img { aspect-ratio: 1/1; }

  /* FAQ */
  .faq-question { font-size: 0.95rem; padding: 1rem; }

  /* Footer bottom stack */
  .footer-bottom { flex-direction: column; align-items: flex-start; gap: 0.4rem; }
}