/* ═══════════════════════════════════════════════════════════
   styles.css — AB BIOSCIENCE Global Brand Stylesheet
   Colors: Forest #044F3D | Brown #A27B55 | Black #0D0C0B | White #FFFFFF
═══════════════════════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=Montserrat:wght@400;500;600;700;800;900&display=swap');

/* ── CSS Variables ── */
:root {
  --navy:        #044F3D;
  --navy-light:  #0a6650;
  --navy-dark:   #0D0C0B;
  --sci-green:   #A27B55;
  --sci-green-l: #c49b72;
  --sci-green-d: #7d5f3d;
  --white:       #ffffff;
  --gray-50:     #f9fafb;
  --gray-100:    #f3f4f6;
  --gray-200:    #e5e7eb;
  --gray-500:    #6b7280;
  --gray-700:    #374151;
  --gray-900:    #111827;
  --shadow-sm:   0 1px 3px rgba(0,0,0,.08);
  --shadow-md:   0 4px 20px rgba(4,79,61,.08);
  --shadow-lg:   0 16px 40px rgba(4,79,61,.12);
  --shadow-xl:   0 30px 60px rgba(4,79,61,.18);
  --radius-sm:   6px;
  --radius-md:   12px;
  --radius-lg:   20px;
  --transition:  all .3s ease;
}

/* ── Reset & Base ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: 'Inter', 'Montserrat', sans-serif;
  color: var(--gray-900);
  background: var(--white);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

/* ══════════════════════════════════════
   NAVIGATION
══════════════════════════════════════ */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(4, 79, 61, .96);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(162, 123, 85, .18);
  transition: var(--transition);
}
.navbar.scrolled {
  background: rgba(13, 12, 11, .99);
  box-shadow: 0 4px 30px rgba(0,0,0,.35);
}
.nav-logo {
  font-family: 'Montserrat', sans-serif;
  font-weight: 800;
  font-size: 1.35rem;
  color: #fff;
  letter-spacing: -.3px;
  display: flex;
  align-items: center;
  gap: .6rem;
}
.nav-logo .logo-icon {
  width: 34px; height: 34px;
  background: linear-gradient(135deg, var(--sci-green), var(--sci-green-d));
  border-radius: 7px;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.nav-logo span { color: var(--sci-green); }

.nav-link {
  color: rgba(255,255,255,.82);
  font-size: .875rem;
  font-weight: 500;
  letter-spacing: .2px;
  transition: color .25s ease;
  position: relative;
  white-space: nowrap;
}
.nav-link::after {
  content: '';
  position: absolute; bottom: -5px; left: 0;
  width: 0; height: 2px;
  background: var(--sci-green);
  transition: width .3s ease;
}
.nav-link:hover, .nav-link.active { color: var(--sci-green); }
.nav-link:hover::after, .nav-link.active::after { width: 100%; }

/* Dropdown */
.dropdown { position: relative; }
.dropdown-menu {
  position: absolute;
  top: calc(100% + 14px); left: 50%;
  transform: translateX(-50%) translateY(-8px);
  background: rgba(13, 12, 11, .98);
  backdrop-filter: blur(14px);
  border: 1px solid rgba(162, 123, 85, .22);
  border-radius: 8px;
  padding: .5rem 0;
  min-width: 210px;
  opacity: 0; visibility: hidden;
  transition: all .3s ease;
  box-shadow: 0 24px 48px rgba(0,0,0,.3);
}
.dropdown:hover .dropdown-menu {
  opacity: 1; visibility: visible;
  transform: translateX(-50%) translateY(0);
}
.dropdown-item {
  display: block;
  padding: .55rem 1.25rem;
  color: rgba(255,255,255,.75);
  font-size: .8125rem;
  border-left: 2px solid transparent;
  transition: all .2s ease;
}
.dropdown-item:hover {
  color: var(--sci-green);
  border-left-color: var(--sci-green);
  background: rgba(162,123,85,.07);
  padding-left: 1.6rem;
}

/* CTA Button in Nav */
.btn-nav-cta {
  background: var(--sci-green);
  color: #fff;
  font-weight: 600;
  font-size: .8125rem;
  padding: .5rem 1.25rem;
  border-radius: var(--radius-sm);
  border: 2px solid var(--sci-green);
  transition: var(--transition);
  letter-spacing: .2px;
  white-space: nowrap;
}
.btn-nav-cta:hover {
  background: transparent;
  color: var(--sci-green);
}

/* Mobile Menu */
.mobile-menu {
  background: rgba(13, 12, 11, .98);
  border-top: 1px solid rgba(162,123,85,.18);
}
.mobile-nav-link {
  display: block;
  padding: .7rem 0;
  color: rgba(255,255,255,.8);
  font-size: .9rem;
  border-bottom: 1px solid rgba(255,255,255,.07);
  transition: color .2s ease;
}
.mobile-nav-link:hover { color: var(--sci-green); }

/* ══════════════════════════════════════
   HERO SECTIONS
══════════════════════════════════════ */
.hero-section {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.hero-bg {
  position: absolute; inset: 0;
  background-size: cover;
  background-position: center top;
}
.hero-bg::after {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(135deg,
    rgba(4,79,61,.92) 0%,
    rgba(4,79,61,.68) 55%,
    rgba(13,12,11,.85) 100%);
}

/* Glass card */
.glass-card {
  background: rgba(255,255,255,.07);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border: 1px solid rgba(255,255,255,.13);
  border-radius: var(--radius-lg);
  box-shadow: 0 25px 50px rgba(0,0,0,.22);
}

/* Inner page hero */
.page-hero {
  position: relative;
  padding: 9rem 0 5rem;
  background: linear-gradient(135deg, var(--navy-dark) 0%, var(--navy) 55%, #0D0C0B 100%);
  overflow: hidden;
}
.page-hero::before {
  content: '';
  position: absolute;
  top: -40%; right: -15%;
  width: 700px; height: 700px;
  background: radial-gradient(circle, rgba(162,123,85,.1) 0%, transparent 65%);
  border-radius: 50%;
}
.page-hero-image {
  position: absolute; inset: 0;
  background-size: cover;
  background-position: center;
  opacity: .22;
}

/* ══════════════════════════════════════
   TYPOGRAPHY HELPERS
══════════════════════════════════════ */
.section-badge {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  background: rgba(162,123,85,.1);
  border: 1px solid rgba(162,123,85,.28);
  color: var(--sci-green);
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  padding: .32rem 1rem;
  border-radius: 50px;
}
.section-title {
  font-family: 'Montserrat', sans-serif;
  font-weight: 800;
  font-size: clamp(1.85rem, 3.8vw, 3rem);
  line-height: 1.14;
  color: var(--navy);
}
.section-title.light { color: #fff; }
.green-line {
  width: 56px; height: 4px;
  background: linear-gradient(90deg, var(--sci-green), var(--sci-green-l));
  border-radius: 2px;
  margin: .9rem 0 1.5rem;
}
.green-line.center { margin-left: auto; margin-right: auto; }

/* ══════════════════════════════════════
   CARDS
══════════════════════════════════════ */
.feature-card {
  background: var(--white);
  border-radius: var(--radius-md);
  border: 1px solid rgba(4,79,61,.07);
  box-shadow: var(--shadow-md);
  transition: var(--transition);
  overflow: hidden;
}
.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(162,123,85,.28);
}
.card-icon {
  width: 62px; height: 62px;
  background: linear-gradient(135deg, rgba(162,123,85,.12), rgba(162,123,85,.05));
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.6rem;
  color: var(--sci-green);
  margin-bottom: 1.2rem;
  transition: all .3s ease;
}
.feature-card:hover .card-icon {
  background: var(--sci-green);
  color: #fff;
  transform: scale(1.05);
}
.card-learn-more {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  font-size: .875rem;
  font-weight: 600;
  color: var(--sci-green);
  margin-top: 1.1rem;
  transition: gap .2s ease;
}
.feature-card:hover .card-learn-more { gap: .75rem; }

/* Product card */
.product-card {
  background: var(--white);
  border-radius: var(--radius-md);
  border: 1px solid rgba(4,79,61,.07);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: var(--transition);
}
.product-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}
.product-badge {
  display: inline-block;
  background: rgba(162,123,85,.1);
  color: var(--sci-green);
  font-size: .68rem;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  padding: .2rem .65rem;
  border-radius: 3px;
}

/* Certification badge */
.cert-badge {
  background: var(--white);
  border: 1px solid rgba(4,79,61,.08);
  border-radius: var(--radius-md);
  padding: 1.6rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: .75rem;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}
.cert-badge:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--sci-green);
}
.cert-icon {
  width: 58px; height: 58px;
  background: linear-gradient(135deg, var(--navy), var(--navy-light));
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: var(--sci-green);
  font-size: 1.5rem;
}

/* Job card */
.job-card {
  background: var(--white);
  border: 1px solid rgba(4,79,61,.08);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  box-shadow: var(--shadow-md);
  transition: var(--transition);
  border-left: 4px solid var(--sci-green);
}
.job-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

/* ══════════════════════════════════════
   BUTTONS
══════════════════════════════════════ */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  background: var(--sci-green);
  color: #fff;
  font-weight: 600;
  font-size: .9375rem;
  padding: .875rem 2rem;
  border-radius: var(--radius-sm);
  border: 2px solid var(--sci-green);
  transition: var(--transition);
  letter-spacing: .2px;
}
.btn-primary:hover {
  background: var(--sci-green-d);
  border-color: var(--sci-green-d);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(162,123,85,.35);
}
.btn-outline-white {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  background: transparent;
  color: #fff;
  font-weight: 600;
  font-size: .9375rem;
  padding: .875rem 2rem;
  border-radius: var(--radius-sm);
  border: 2px solid rgba(255,255,255,.45);
  transition: var(--transition);
}
.btn-outline-white:hover {
  background: rgba(255,255,255,.1);
  border-color: #fff;
  transform: translateY(-2px);
}
.btn-outline-navy {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  background: transparent;
  color: var(--navy);
  font-weight: 600;
  font-size: .9rem;
  padding: .75rem 1.6rem;
  border-radius: var(--radius-sm);
  border: 2px solid rgba(4,79,61,.3);
  transition: var(--transition);
}
.btn-outline-navy:hover {
  background: var(--navy);
  color: #fff;
  border-color: var(--navy);
}
.btn-download {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  background: transparent;
  color: var(--sci-green);
  font-weight: 600;
  font-size: .825rem;
  padding: .55rem 1.1rem;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--sci-green);
  transition: var(--transition);
}
.btn-download:hover {
  background: var(--sci-green);
  color: #fff;
}

/* ══════════════════════════════════════
   TABS (Industries)
══════════════════════════════════════ */
.tab-btn {
  padding: .7rem 1.5rem;
  font-weight: 600;
  font-size: .875rem;
  border-radius: var(--radius-sm);
  border: 2px solid rgba(4,79,61,.14);
  color: var(--navy);
  background: var(--white);
  transition: var(--transition);
  white-space: nowrap;
}
.tab-btn:hover { background: var(--navy); color: #fff; border-color: var(--navy); }
.tab-btn.active { background: var(--sci-green); color: #fff; border-color: var(--sci-green); }
.tab-panel { display: none; }
.tab-panel.active { display: grid; }

/* ══════════════════════════════════════
   STATS
══════════════════════════════════════ */
.stat-number {
  font-family: 'Montserrat', sans-serif;
  font-weight: 900;
  font-size: clamp(2rem, 4.5vw, 3.25rem);
  background: linear-gradient(135deg, var(--sci-green), var(--sci-green-l));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
}

/* ══════════════════════════════════════
   MODAL
══════════════════════════════════════ */
.modal-overlay {
  position: fixed; inset: 0;
  background: rgba(13,12,11,.88);
  backdrop-filter: blur(6px);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.25rem;
  opacity: 0; visibility: hidden;
  transition: all .3s ease;
}
.modal-overlay.active { opacity: 1; visibility: visible; }
.modal-box {
  background: #fff;
  border-radius: 16px;
  max-width: 580px;
  width: 100%;
  box-shadow: 0 40px 80px rgba(0,0,0,.35);
  transform: translateY(20px) scale(.97);
  transition: all .3s ease;
  overflow: hidden;
  max-height: 92vh;
  overflow-y: auto;
}
.modal-overlay.active .modal-box { transform: translateY(0) scale(1); }
.modal-header {
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-light) 100%);
  padding: 1.75rem 2rem;
  position: relative;
}
.modal-body { padding: 1.75rem 2rem; }

/* ══════════════════════════════════════
   FORMS
══════════════════════════════════════ */
.form-label {
  display: block;
  font-size: .8125rem;
  font-weight: 600;
  color: var(--navy);
  margin-bottom: .38rem;
  letter-spacing: .2px;
}
.form-input {
  width: 100%;
  padding: .68rem 1rem;
  border: 1.5px solid var(--gray-200);
  border-radius: var(--radius-sm);
  font-size: .9rem;
  color: var(--gray-900);
  background: var(--gray-50);
  transition: var(--transition);
  outline: none;
  font-family: 'Inter', sans-serif;
}
.form-input:focus {
  border-color: var(--sci-green);
  background: var(--white);
  box-shadow: 0 0 0 3px rgba(162,123,85,.1);
}
textarea.form-input { resize: vertical; min-height: 120px; }
select.form-input {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20'%3E%3Cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='M6 8l4 4 4-4'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right .75rem center;
  background-size: 1.2em;
}

/* ══════════════════════════════════════
   FOOTER
══════════════════════════════════════ */
.footer {
  background: var(--navy-dark);
  color: rgba(255,255,255,.7);
  padding: 4.5rem 0 2rem;
  border-top: 1px solid rgba(162,123,85,.18);
}
.footer-heading {
  font-family: 'Montserrat', sans-serif;
  font-weight: 700;
  color: #fff;
  font-size: .9375rem;
  margin-bottom: 1.2rem;
  padding-bottom: .7rem;
  position: relative;
}
.footer-heading::after {
  content: '';
  position: absolute; bottom: 0; left: 0;
  width: 30px; height: 2px;
  background: var(--sci-green);
}
.footer-link {
  display: block;
  color: rgba(255,255,255,.55);
  font-size: .825rem;
  padding: .22rem 0;
  transition: all .25s ease;
}
.footer-link:hover { color: var(--sci-green); padding-left: 5px; }
.social-link {
  width: 36px; height: 36px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,.2);
  display: flex; align-items: center; justify-content: center;
  color: rgba(255,255,255,.55);
  font-size: .875rem;
  transition: var(--transition);
}
.social-link:hover {
  background: var(--sci-green);
  border-color: var(--sci-green);
  color: #fff;
  transform: translateY(-2px);
}

/* ══════════════════════════════════════
   GALLERY
══════════════════════════════════════ */
.gallery-item {
  overflow: hidden;
  border-radius: 10px;
  position: relative;
}
.gallery-item img {
  transition: transform .6s ease;
  width: 100%; height: 100%;
  object-fit: cover;
}
.gallery-item:hover img { transform: scale(1.06); }

/* Map placeholder */
.map-placeholder {
  background: linear-gradient(135deg, #f4ede3, #ede5da);
  border-radius: var(--radius-md);
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  min-height: 320px;
  border: 2px dashed rgba(4,79,61,.15);
  color: var(--navy); font-weight: 600;
  gap: .75rem;
}

/* ══════════════════════════════════════
   SCROLL-TO-TOP
══════════════════════════════════════ */
.scroll-top {
  position: fixed;
  bottom: 1.75rem; right: 1.75rem;
  width: 44px; height: 44px;
  background: var(--sci-green);
  color: #fff;
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  z-index: 200;
  opacity: 0; visibility: hidden;
  transition: var(--transition);
  box-shadow: 0 4px 15px rgba(162,123,85,.4);
  cursor: pointer;
}
.scroll-top.visible { opacity: 1; visibility: visible; }
.scroll-top:hover { background: var(--navy); transform: translateY(-2px); }

/* ══════════════════════════════════════
   ANIMATIONS / REVEALS
══════════════════════════════════════ */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(32px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-12px); }
}
@keyframes pulseGreen {
  0%, 100% { box-shadow: 0 0 0 0 rgba(162,123,85,.5); }
  50%       { box-shadow: 0 0 0 14px rgba(162,123,85,0); }
}

.animate-fade-up { animation: fadeInUp .85s ease forwards; }
.animate-float   { animation: float 4.5s ease-in-out infinite; }

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .7s ease, transform .7s ease;
}
.reveal.visible { opacity: 1; transform: translateY(0); }

.delay-1 { transition-delay: .12s; }
.delay-2 { transition-delay: .24s; }
.delay-3 { transition-delay: .36s; }
.delay-4 { transition-delay: .48s; }

/* ══════════════════════════════════════
   UTILITIES
══════════════════════════════════════ */
.section-py { padding-top: 5.5rem; padding-bottom: 5.5rem; }
.text-sci-green  { color: var(--sci-green); }
.text-navy       { color: var(--navy); }
.bg-navy         { background-color: var(--navy); }
.bg-sci-green    { background-color: var(--sci-green); }
.bg-navy-dark    { background-color: var(--navy-dark); }

/* Progress bars */
.progress-bar {
  height: 8px;
  background: rgba(255,255,255,.15);
  border-radius: 4px;
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  border-radius: 4px;
  background: linear-gradient(90deg, var(--sci-green), var(--sci-green-l));
}

/* Accent strip */
.accent-strip {
  height: 4px;
  background: linear-gradient(90deg, var(--sci-green), var(--sci-green-l), var(--navy-light));
}

/* ══════════════════════════════════════
   RESPONSIVE
══════════════════════════════════════ */
@media (max-width: 1024px) {
  .page-hero { padding: 8rem 0 4.5rem; }
}
@media (max-width: 768px) {
  .section-py { padding-top: 3.5rem; padding-bottom: 3.5rem; }
  .page-hero  { padding: 7.5rem 0 4rem; }
  .modal-body { padding: 1.5rem; }
  .modal-header { padding: 1.5rem; }
  .hero-section { min-height: auto; padding: 6rem 0 4rem; }
}