/* ────────────────────────────────────────────
   Interflex Group Inc. — Main Stylesheet
   ──────────────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

:root {
  --navy:        #0D1F3C;
  --navy-light:  #132843;
  --blue:        #1D72D4;
  --blue-light:  #3B8EF0;
  --accent:      #F5A623;
  --text:        #1A1A2E;
  --muted:       #6B7A99;
  --bg:          #F4F7FC;
  --white:       #FFFFFF;
  --border:      #DDE4F0;
  --font-display: 'Inter', sans-serif;
  --font-body:    'Inter', sans-serif;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  overflow-x: clip;
}

body {
  font-family: 'Inter', var(--font-body);
  color: var(--text);
  background: var(--white);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

h3 { line-height: 1.2; }

/* ── UTILITIES ── */
.container {
  max-width: 1200px;
  margin: 0 auto;
}

.btn {
  display: inline-block;
  padding: 11px 24px;
  border-radius: 6px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 15px;
  cursor: pointer;
  text-decoration: none;
  transition: background .2s, border-color .2s, color .2s, transform .2s, box-shadow .2s;
  border: 2px solid transparent;
  position: relative;
  overflow: hidden;
}

/* Shimmer sweep */
.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -80%;
  width: 55%;
  height: 100%;
  background: linear-gradient(to right, transparent, rgba(255,255,255,0.22), transparent);
  transform: skewX(-18deg);
  transition: left .55s ease;
  pointer-events: none;
}
.btn:hover::before { left: 150%; }


@keyframes btn-pulse {
  0%   { box-shadow: 0 0 0 0   rgba(29,114,212,.55); }
  70%  { box-shadow: 0 0 0 10px rgba(29,114,212,0);  }
  100% { box-shadow: 0 0 0 0   rgba(29,114,212,0);   }
}

.btn-primary {
  background: var(--blue);
  color: var(--white);
  border-color: var(--blue);
}
.btn-primary:hover {
  background: var(--blue-light);
  border-color: var(--blue-light);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(29,114,212,.35);
}

/* Pulse only on navbar CTA */
.nav-links .btn-primary {
  animation: btn-pulse 2s ease-out infinite;
}
.nav-links .btn-primary:hover {
  animation-play-state: paused;
}

.btn-outline {
  background: transparent;
  color: var(--blue);
  border-color: var(--blue);
}
.btn-outline:hover {
  background: var(--blue);
  color: var(--white);
  transform: translateY(-1px);
}

.btn-white {
  background: var(--white);
  color: var(--navy);
  border-color: var(--white);
}
.btn-white:hover {
  background: var(--bg);
  transform: translateY(-1px);
}

.eyebrow {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 16px;
  display: block;
}

.section-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 46px;
  line-height: 1.1;
  letter-spacing: -0.03em;
  color: var(--navy);
  margin-bottom: 20px;
}
.section-title.white { color: var(--white); }

.section-sub {
  font-size: 17px;
  color: #4A5568;
  max-width: 540px;
  line-height: 1.7;
}
.section-sub.white { color: rgba(255,255,255,.75); }

/* Image placeholders */
.img-placeholder {
  background: linear-gradient(135deg, #c8d6e8 0%, #a8bdd6 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(13,31,60,.4);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 1px;
  text-align: center;
}

/* ── NAVIGATION ── */
#site-nav {
  position: sticky;
  top: 0;
  z-index: 200;
  background: rgba(255,255,255,.72);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(221,228,240,.6);
  height: 80px;
  box-shadow: 0 2px 24px rgba(13,31,60,.06);
  transition: height .35s ease, background .3s, box-shadow .3s;
  display: flex;
  align-items: center;
  justify-content: center;
}
#site-nav.scrolled {
  height: 64px;
  box-shadow: 0 2px 16px rgba(13,31,60,.10);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  padding: 0 40px;
  max-width: 1200px;
  width: 100%;
  box-sizing: border-box;
  transition: padding .35s ease;
}
#site-nav.scrolled .nav-inner {
  padding: 0;
}
.nav-logo img {
  height: 75px;
  width: auto;
  display: block;
  transition: height .35s ease;
}
#site-nav.scrolled .nav-logo img {
  height: 65px;
}

/* Active nav link — set by IntersectionObserver */
.nav-links a.is-active {
  color: var(--blue);
  font-weight: 600;
}
.nav-links a.is-active::after {
  content: '';
  display: block;
  height: 2px;
  background: var(--blue);
  border-radius: 2px;
  margin-top: 2px;
  animation: navUnderline .2s ease forwards;
}
@keyframes navUnderline {
  from { transform: scaleX(0); }
  to   { transform: scaleX(1); }
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  flex-shrink: 0;
}
.nav-logo svg { width: 56px; height: 56px; }

.nav-logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}
.nav-logo-text span:first-child {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 24px;
  color: var(--navy);
  letter-spacing: -0.5px;
}
.nav-logo-text span:last-child {
  font-size: 11px;
  color: var(--muted);
  font-weight: 500;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-links li { display: flex; align-items: center; }
.nav-links a {
  text-decoration: none;
  color: var(--text);
  font-weight: 500;
  font-size: 15px;
  transition: color .2s;
}
.nav-links a:not(.btn):hover { color: var(--blue); }

#site-nav .btn-primary {
  background: var(--blue);
  border-color: var(--blue);
  color: var(--white);
}
#site-nav .btn-primary:hover {
  background: var(--blue-light);
  border-color: var(--blue-light);
  color: var(--white);
}

/* Hamburger button */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  background: none;
  border: none;
  border-radius: 4px;
}
.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--blue);
  border-radius: 2px;
  transition: all .25s;
}
.hamburger[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.hamburger[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}
.hamburger[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile navigation overlay */
.mobile-nav-overlay {
  display: none;
  position: fixed;
  top: 64px;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--navy);
  z-index: 190;
  padding: 40px 28px 40px;
  overflow-y: auto;
}
.mobile-nav-overlay.is-open { display: flex; flex-direction: column; }

.mobile-nav-overlay ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0;
  flex: 1;
}

.mobile-nav-overlay ul li a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 0;
  font-size: 22px;
  font-weight: 600;
  color: rgba(255,255,255,.85);
  text-decoration: none;
  border-bottom: 1px solid rgba(255,255,255,.08);
  transition: color .2s, padding-left .2s;
  letter-spacing: -0.01em;
}
.mobile-nav-overlay ul li a::after {
  content: '';
  width: 8px;
  height: 8px;
  border-right: 2px solid rgba(255,255,255,.2);
  border-top: 2px solid rgba(255,255,255,.2);
  transform: rotate(45deg);
  flex-shrink: 0;
  transition: border-color .2s, transform .2s;
}
.mobile-nav-overlay ul li a:hover {
  color: var(--white);
  padding-left: 6px;
}
.mobile-nav-overlay ul li a:hover::after {
  border-color: var(--blue);
  transform: rotate(45deg) translateX(2px) translateY(-2px);
}

.mobile-nav-overlay ul li:last-child a {
  margin-top: 28px;
  border-bottom: none;
  background: var(--blue);
  color: var(--white);
  padding: 16px 24px;
  border-radius: 8px;
  font-size: 16px;
  font-weight: 700;
  justify-content: center;
  letter-spacing: 0;
}
.mobile-nav-overlay ul li:last-child a::after { display: none; }
.mobile-nav-overlay ul li:last-child a:hover {
  background: var(--blue-light);
  padding-left: 24px;
}

/* ── HERO ── */
.hero {
  padding: 80px 40px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  min-height: 560px;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 20px;
}
.hero-eyebrow::before {
  content: '';
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--blue);
}

.hero h1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 56px;
  line-height: 1.05;
  letter-spacing: -0.03em;
  color: var(--navy);
  margin-bottom: 6px;
}
.hero h1 span {
  color: var(--blue);
  display: block;
}

.hero p {
  font-size: 17px;
  color: #4A5568;
  margin: 20px 0 36px;
  line-height: 1.7;
}

.hero-image-wrap { position: relative; }
.hero-image-wrap img {
  width: 100%;
  height: 380px;
  object-fit: cover;
  border-radius: 12px;
}

.hero-badge {
  position: absolute;
  bottom: 20px;
  right: 20px;
  background: var(--navy);
  color: var(--white);
  padding: 10px 18px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
}
.hero-badge svg { color: #4ADE80; flex-shrink: 0; }

/* ── TRUST BAR ── */
.trust-bar {
  background: var(--navy);
  padding: 18px 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px 0;
}

.trust-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: rgba(255,255,255,.45);
  margin-right: 32px;
  white-space: nowrap;
}

.trust-items {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  justify-content: center;
}

.trust-item {
  color: rgba(255,255,255,.85);
  font-weight: 600;
  font-size: 14px;
  padding: 4px 20px;
  border-right: 1px solid rgba(255,255,255,.15);
  white-space: nowrap;
}
.trust-item:last-child { border-right: none; }

/* ── SECTIONS ── */
section { padding: 80px 40px; }

/* ── ABOUT ── */
.about { background: var(--white); }

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.about p {
  color: #4A5568;
  font-size: 16px;
  line-height: 1.75;
  margin-bottom: 16px;
}

.stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 32px;
}

.stat-card {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px 24px;
  background: var(--bg);
}

.stat-num {
  font-family: var(--font-display);
  font-size: 40px;
  font-weight: 800;
  color: var(--navy);
  line-height: 1;
}
.stat-num sup {
  font-size: 22px;
  color: var(--blue);
}

.stat-label {
  font-size: 13px;
  color: var(--muted);
  margin-top: 4px;
  font-weight: 500;
}

.about-images { position: relative; }
.about-images img {
  width: 100%;
  height: 420px;
  object-fit: cover;
  border-radius: 12px;
}
.about-images .img-inset {
  position: absolute;
  bottom: -24px;
  right: -24px;
  width: 180px;
  height: 140px;
  border-radius: 10px;
  object-fit: cover;
  border: 4px solid var(--white);
  box-shadow: 0 8px 30px rgba(0,0,0,.15);
}

/* ── CAPABILITIES ── */
.capabilities {
  background: var(--navy);
  padding: 80px 40px;
}

.cap-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 52px;
}

.cap-card {
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.10);
  border-radius: 12px;
  padding: 28px 24px;
  transition: all .25s;
}
.cap-card:hover {
  background: rgba(255,255,255,.10);
  transform: translateY(-4px);
  border-color: rgba(29,114,212,.5);
}

.cap-icon {
  width: 44px;
  height: 44px;
  background: rgba(29,114,212,.2);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  font-size: 22px;
}
.cap-icon--img { background: rgba(255,255,255,.10); padding: 8px; }
.cap-icon img  { width: 100%; height: 100%; object-fit: contain; display: block; filter: brightness(0) invert(1); }

.cap-card h3 {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 10px;
}
.cap-card p {
  font-size: 14px;
  color: rgba(255,255,255,.65);
  line-height: 1.6;
}

/* ── PRODUCTS ── */
.products { background: var(--bg); }

.products-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 48px;
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.product-card {
  background: var(--white);
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--border);
  transition: all .25s;
}
.product-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(13,31,60,.12);
  border-color: var(--blue);
}
.product-card img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  background: #dde4f0;
}
.product-card-body { padding: 18px 20px; }
.product-card h3 {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 6px;
}
.product-card p {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.5;
}

.products-cta { text-align: center; margin-top: 48px; }

/* ── LDPE SECTION ── */
.ldpe-section { background: var(--white); }

.ldpe-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-top: 48px;
}

.ldpe-card {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 32px 28px;
  background: var(--bg);
  transition: all .25s;
}
.ldpe-card:hover {
  box-shadow: 0 8px 32px rgba(13,31,60,.10);
  border-color: var(--blue);
  transform: translateY(-3px);
}

.ldpe-icon {
  font-size: 32px;
  margin-bottom: 16px;
  display: block;
}
.ldpe-card--has-image { padding: 0; overflow: hidden; }
.ldpe-card--has-image .ldpe-card-body { padding: 24px 28px 28px; }
.ldpe-image {
  width: 100%;
  aspect-ratio: 16 / 10;
  overflow: hidden;
}
.ldpe-image img {
  width: 100%;
  height: 100%;
  object-fit: fill;
  display: block;
  transition: transform .4s ease;
}
.ldpe-card--has-image:hover .ldpe-image img { transform: scale(1.04); }
.ldpe-card h3 {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 12px;
}
.ldpe-card ul { list-style: none; padding: 0; }
.ldpe-card ul li {
  font-size: 14px;
  color: #4A5568;
  padding: 5px 0 5px 18px;
  position: relative;
  line-height: 1.5;
}
.ldpe-card ul li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--blue);
  font-size: 12px;
}
.ldpe-card ul li strong {
  color: var(--navy);
  font-weight: 600;
}

/* ── WHY CHOOSE ── */
.why { background: var(--bg); }

.why-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 48px;
}

.why-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px 24px;
  transition: all .25s;
}
.why-card:hover {
  box-shadow: 0 8px 30px rgba(13,31,60,.10);
  border-color: var(--blue);
  transform: translateY(-3px);
}

.why-icon {
  width: 75px;
  height: 75px;
  background: rgba(29,114,212,.1);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  margin-bottom: 16px;
}
.why-icon--img { background: transparent; padding: 0; }
.why-icon img  { width: 100%; height: 100%; object-fit: contain; display: block; }
.why-title { max-width: 700px; }
.why-card h3 {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 10px;
}
.why-card p { font-size: 14px; color: var(--muted); line-height: 1.65; }

/* ── SUSTAINABLE ── */
.sustainable { background: var(--white); }

.sustain-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  margin-top: 16px;
}

.sustain-options {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 24px;
}

.sustain-tag {
  background: rgba(29,114,212,.08);
  border: 1px solid rgba(29,114,212,.2);
  border-radius: 8px;
  padding: 14px 18px;
  font-size: 14px;
  font-weight: 600;
  color: var(--navy);
  display: flex;
  align-items: center;
  gap: 10px;
}
.sustain-tag span { font-size: 18px; }

.sustain-image img {
  width: 100%;
  height: 380px;
  object-fit: cover;
  border-radius: 12px;
}

/* ── MARKETS ── */
.markets { background: var(--bg); }

.markets-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
}

.market-card--has-image { padding: 0; overflow: hidden; }
.market-card--has-image .market-card-body { padding: 28px; }
.market-image {
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: #eef2f7;
}
.market-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform .4s ease;
}
.market-card--has-image:hover .market-image img { transform: scale(1.04); }

.market-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 32px 28px;
  transition: all .25s;
  position: relative;
  overflow: hidden;
}
.market-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: var(--blue);
  transform: scaleX(0);
  transition: transform .3s;
}
.market-card:hover::before { transform: scaleX(1); }
.market-card:hover {
  box-shadow: 0 10px 40px rgba(13,31,60,.12);
  transform: translateY(-4px);
}

.market-icon { font-size: 36px; margin-bottom: 16px; display: block; }
.market-card h3 {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 12px;
}
.market-card p { font-size: 14px; color: var(--muted); line-height: 1.7; }

/* ── TESTIMONIALS ── */
.testimonials { background: var(--navy); }

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
}

.testi-card {
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.10);
  border-radius: 12px;
  padding: 32px 28px;
  position: relative;
}

.testi-stars {
  color: #FBBF24;
  font-size: 16px;
  letter-spacing: 2px;
  margin-bottom: 16px;
}
.testi-quote {
  font-size: 22px;
  color: rgba(255,255,255,.2);
  position: absolute;
  top: 24px; right: 24px;
  font-family: Georgia, serif;
  line-height: 1;
}
.testi-card blockquote {
  font-size: 15px;
  color: rgba(255,255,255,.85);
  line-height: 1.7;
  font-style: italic;
  margin-bottom: 24px;
}

.testi-author { display: flex; align-items: center; gap: 12px; }
.testi-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--blue);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 13px;
  color: var(--white);
  flex-shrink: 0;
}
.testi-author-info strong {
  display: block;
  font-size: 14px;
  color: var(--white);
  font-weight: 600;
}
.testi-author-info span { font-size: 12px; color: rgba(255,255,255,.5); }

/* ── CONTACT ── */
.contact { background: var(--bg); }

.contact-wrap {
  background: var(--white);
  border-radius: 16px;
  box-shadow: 0 4px 40px rgba(13,31,60,.08);
  display: grid;
  grid-template-columns: 1fr 1fr;
  overflow: hidden;
  border: 1px solid var(--border);
}

.contact-left {
  padding: 52px 48px;
  background: var(--navy);
  color: var(--white);
}
.contact-left .eyebrow { color: rgba(255,255,255,.55); }
.contact-left h2 {
  font-family: var(--font-display);
  font-size: 38px;
  font-weight: 800;
  color: var(--white);
  line-height: 1.1;
  margin-bottom: 16px;
}
.contact-left p {
  font-size: 15px;
  color: rgba(255,255,255,.7);
  line-height: 1.7;
  margin-bottom: 32px;
}

.contact-checklist { list-style: none; display: flex; flex-direction: column; gap: 12px; }
.contact-checklist li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 14px;
  color: rgba(255,255,255,.8);
}
.contact-checklist li::before {
  content: '✓';
  background: rgba(29,114,212,.3);
  border: 1px solid rgba(29,114,212,.5);
  color: #60A5FA;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 1px;
}

.contact-right { padding: 52px 48px; }

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 20px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 7px;
  margin-bottom: 20px;
}
.form-group.half { margin-bottom: 0; }

.form-group label {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--muted);
}

.form-group input,
.form-group select,
.form-group textarea {
  padding: 12px 16px;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  font-family: var(--font-body);
  font-size: 15px;
  color: var(--text);
  background: var(--bg);
  transition: border-color .2s;
  outline: none;
  appearance: none;
  -webkit-appearance: none;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--blue);
  background: var(--white);
}
.form-group select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%236B7A99' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 36px;
}
.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.form-submit { width: 100%; padding: 14px; font-size: 16px; }

/* Form success message */
.form-success {
  margin-top: 20px;
  border-radius: 10px;
  border: 1px solid rgba(34,197,94,.25);
  background: rgba(34,197,94,.06);
  padding: 20px 24px;
}
.form-success[hidden] { display: none; }

.form-success-inner {
  display: flex;
  align-items: flex-start;
  gap: 14px;
}
.form-success-inner strong {
  display: block;
  font-size: 15px;
  color: var(--text);
  font-weight: 700;
  margin-bottom: 4px;
}
.form-success-inner p {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.5;
}

/* ── FOOTER ── */
footer {
  background: var(--navy);
  padding: 64px 40px 32px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.8fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,.10);
}

.footer-brand p {
  font-size: 14px;
  color: rgba(255,255,255,.5);
  line-height: 1.7;
  margin-top: 16px;
  max-width: 280px;
}

.footer-col h4 {
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: rgba(255,255,255,.4);
  margin-bottom: 20px;
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-col ul li a {
  font-size: 14px;
  color: rgba(255,255,255,.65);
  text-decoration: none;
  transition: color .2s;
}
.footer-col ul li a:hover { color: var(--white); }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 28px;
}
.footer-bottom p { font-size: 13px; color: rgba(255,255,255,.35); }

.footer-bottom-links { display: flex; gap: 24px; }
.footer-bottom-links a {
  font-size: 13px;
  color: rgba(255,255,255,.4);
  text-decoration: none;
  transition: color .2s;
}
.footer-bottom-links a:hover { color: rgba(255,255,255,.8); }

/* ────────────────────────────────────────────
   RESPONSIVE — 1280px (large laptop)
   ──────────────────────────────────────────── */
@media (max-width: 1280px) {
  .hero { padding: 72px 40px; }
  .hero h1 { font-size: 50px; }
  .section-title { font-size: 42px; }
}

/* ────────────────────────────────────────────
   RESPONSIVE — 1024px (tablet landscape)
   ──────────────────────────────────────────── */
@media (max-width: 1024px) {
  .cap-grid    { grid-template-columns: repeat(2, 1fr); }
  .products-grid { grid-template-columns: repeat(2, 1fr); }
  .why-grid    { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .about-grid  { gap: 48px; }
}

/* ────────────────────────────────────────────
   RESPONSIVE — 768px (tablet portrait / mobile)
   ──────────────────────────────────────────── */
@media (max-width: 768px) {
  /* ── Nav: fixed on mobile ── */
  #site-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 72px;
    background: rgba(255,255,255,1);
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    box-shadow: 0 1px 0 rgba(221,228,240,.8);
    transition: height .3s ease, background .3s, box-shadow .3s;
  }
  #site-nav.scrolled {
    height: 58px;
    background: rgba(255,255,255,.75);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    box-shadow: 0 2px 16px rgba(13,31,60,.10);
  }
  .nav-inner { padding: 0 20px; }
  #site-nav.scrolled .nav-inner { padding: 0 20px; }
  .nav-logo img { height: 50px; transition: height .3s ease; }
  #site-nav.scrolled .nav-logo img { height: 40px; }
  .nav-links { display: none; }
  .hamburger { display: flex; }

  /* Compensate for fixed nav + clip horizontal overflow */
  html { overflow-x: hidden; scroll-padding-top: 72px; }
  body {
    padding-top: 72px;
    overflow-x: hidden;
  }

  /* Mobile overlay tracks nav height */
  .mobile-nav-overlay { top: 72px; transition: top .3s ease; }
  #site-nav.scrolled ~ .mobile-nav-overlay { top: 58px; }

  /* Buttons: disable pulse (battery), add tap feedback */
  .btn-primary { animation: none; }
  .btn:active   { transform: scale(0.96); transition: transform .1s ease; }

  /* Reduce section padding */
  section { padding: 56px 20px; }
  .capabilities { padding: 56px 20px; }

  /* Section titles */
  .section-title { font-size: 34px; }

  /* Hero */
  .hero {
    grid-template-columns: 1fr;
    padding: 48px 20px;
    gap: 40px;
    min-height: auto;
    width: 100%;
  }
  .hero > * { min-width: 0; }
  .hero h1 { font-size: 40px; }
  .hero p  { font-size: 16px; }
  .hero-image-wrap img { height: 260px; }

  /* Trust bar */
  .trust-bar {
    flex-direction: column;
    gap: 12px;
    padding: 24px 20px;
  }
  .trust-label { margin-right: 0; }
  .trust-items { justify-content: center; flex-wrap: wrap; gap: 8px; }
  .trust-item {
    padding: 4px 16px;
    font-size: 13px;
  }

  /* About */
  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .about-images .img-inset { display: none; }
  .about-images img { height: 280px; }
  .stats-grid { grid-template-columns: 1fr 1fr; }

  /* Capabilities */
  .cap-grid { grid-template-columns: 1fr; }

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

  /* LDPE */
  .ldpe-grid { grid-template-columns: 1fr; }

  /* Sustainable */
  .sustain-grid { grid-template-columns: 1fr; gap: 32px; }
  .sustain-options { grid-template-columns: 1fr; }
  .sustain-image img { height: 240px; }

  /* Why */
  .why-grid { grid-template-columns: 1fr; }

  /* Markets */
  .markets-grid { grid-template-columns: 1fr; }

  /* Testimonials */
  .testimonials-grid { grid-template-columns: 1fr; }

  /* Contact */
  .contact-wrap { grid-template-columns: 1fr; }
  .contact-left  { padding: 40px 28px; }
  .contact-right { padding: 40px 28px; }
  .contact-left h2 { font-size: 30px; }
  .form-row { grid-template-columns: 1fr; }

  /* Footer */
  footer { padding: 48px 20px 24px; }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
    padding-bottom: 32px;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }
  .footer-bottom-links { flex-wrap: wrap; justify-content: center; gap: 16px; }
}

/* ────────────────────────────────────────────
   RESPONSIVE — 480px (small phones)
   ──────────────────────────────────────────── */
@media (max-width: 480px) {
  .stats-grid { grid-template-columns: 1fr 1fr; }

  .hero h1 { font-size: 34px; }
  .section-title { font-size: 30px; }
  .contact-left h2 { font-size: 26px; }

  .hero-badge {
    font-size: 11px;
    padding: 8px 12px;
    bottom: 12px;
    right: 12px;
  }

  .nav-logo-text span:last-child { display: none; }
}