/* SureFire Biosciences — Professional Clean Theme */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Playfair+Display:wght@400;600;700&display=swap');

:root {
  --red: #E63028;
  --red-dark: #C4251E;
  --red-light: #FEF2F2;
  --dark: #1A1A1A;
  --gray-900: #2D2D2D;
  --gray-700: #4A4A4A;
  --gray-500: #6B7280;
  --gray-300: #D1D5DB;
  --gray-100: #F3F4F6;
  --gray-50: #F9FAFB;
  --white: #FFFFFF;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', sans-serif;
  color: var(--dark);
  line-height: 1.6;
  background: var(--white);
}

h1, h2, h3, h4 { font-family: 'Playfair Display', serif; font-weight: 700; line-height: 1.2; }
h1 { font-size: clamp(2rem, 5vw, 3.2rem); }
h2 { font-size: clamp(1.6rem, 4vw, 2.4rem); }
h3 { font-size: 1.3rem; }

a { color: var(--red); text-decoration: none; transition: color .2s; }
a:hover { color: var(--red-dark); }

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

.container { max-width: 1200px; margin: 0 auto; padding: 0 1.5rem; }

/* === PROMO BANNER === */
.promo-banner {
  background: var(--red);
  color: var(--white);
  text-align: center;
  padding: .6rem 1rem;
  font-weight: 600;
  font-size: .9rem;
  letter-spacing: .5px;
}

/* === NAV === */
.navbar {
  position: sticky; top: 0; z-index: 100;
  background: var(--white);
  border-bottom: 1px solid var(--gray-300);
  box-shadow: 0 1px 4px rgba(0,0,0,.06);
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  max-width: 1200px; margin: 0 auto; padding: .8rem 1.5rem;
}
.nav-logo { display: flex; align-items: center; gap: .6rem; font-weight: 700; font-size: 1.3rem; color: var(--dark); }
.nav-logo img { height: 40px; width: 40px; object-fit: contain; }
.nav-logo span.red { color: var(--red); }

.nav-links { display: flex; gap: 1.8rem; list-style: none; align-items: center; }
.nav-links a { color: var(--gray-700); font-weight: 500; font-size: .95rem; transition: color .2s; }
.nav-links a:hover, .nav-links a.active { color: var(--red); }

/* Dropdown */
.nav-dropdown { position: relative; }
.nav-dropdown > a::after {
  content: '';
  display: inline-block;
  width: 0; height: 0;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 4px solid currentColor;
  margin-left: 5px;
  vertical-align: middle;
}
.dropdown-menu {
  display: none;
  position: absolute;
  top: 100%;
  left: -1rem;
  background: var(--white);
  border: 1px solid var(--gray-300);
  border-radius: 8px;
  box-shadow: 0 8px 24px rgba(0,0,0,.1);
  min-width: 240px;
  padding: .5rem 0;
  z-index: 200;
}
.nav-dropdown:hover .dropdown-menu { display: block; }
.dropdown-menu a {
  display: flex;
  align-items: center;
  gap: .6rem;
  padding: .7rem 1.2rem;
  color: var(--gray-700) !important;
  font-size: .9rem;
  font-weight: 400;
  transition: background .15s;
}
.dropdown-menu a:hover { background: var(--gray-50); color: var(--red) !important; }
.dropdown-menu a i { color: var(--red); width: 18px; text-align: center; font-size: .85rem; }
.dropdown-divider { height: 1px; background: var(--gray-100); margin: .3rem 0; }

.nav-cta {
  background: var(--red); color: var(--white) !important; padding: .55rem 1.3rem;
  border-radius: 6px; font-weight: 600; font-size: .9rem; transition: background .2s;
}
.nav-cta:hover { background: var(--red-dark); color: var(--white) !important; }

.hamburger { display: none; background: none; border: none; cursor: pointer; }
.hamburger span { display: block; width: 24px; height: 2px; background: var(--dark); margin: 5px 0; transition: .3s; }

/* === HERO === */
.hero {
  background: linear-gradient(rgba(0,0,0,0.35), rgba(0,0,0,0.3)), url('images/home-hero-light.png') center/cover no-repeat;
  padding: 7rem 1.5rem 6rem;
  text-align: center;
  color: var(--white);
}
.hero h1 { margin-bottom: 1.2rem; color: var(--white); }
.hero h1 span { color: #ff6b63; }
.hero p { max-width: 650px; margin: 0 auto 2rem; color: rgba(255,255,255,.85); font-size: 1.15rem; }

.btn {
  display: inline-block; padding: .75rem 2rem; border-radius: 6px;
  font-weight: 600; font-size: 1rem; transition: all .2s; cursor: pointer; border: none;
}
.btn-primary { background: var(--red); color: var(--white); }
.btn-primary:hover { background: var(--red-dark); color: var(--white); transform: translateY(-1px); box-shadow: 0 4px 12px rgba(230,48,40,.3); }
.btn-outline { border: 2px solid var(--red); color: var(--red); background: transparent; }
.btn-outline:hover { background: var(--red); color: var(--white); }
.btn-group { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

/* === SECTIONS === */
.section { padding: 4.5rem 1.5rem; }
.section-gray { background: var(--gray-50); }
.section-title { text-align: center; margin-bottom: .6rem; }
.section-sub { text-align: center; color: var(--gray-500); max-width: 600px; margin: 0 auto 2.5rem; }

/* === PRODUCT CARDS === */
.card-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 2rem; }

.card {
  background: var(--white); border: 1px solid var(--gray-300); border-radius: 10px;
  padding: 2rem; transition: all .25s; position: relative; overflow: hidden;
}
.card:hover { transform: translateY(-4px); box-shadow: 0 12px 32px rgba(0,0,0,.08); border-color: var(--red); }

.card-badge {
  display: inline-block; background: var(--red-light); color: var(--red);
  font-size: .75rem; font-weight: 600; padding: .25rem .75rem; border-radius: 20px;
  margin-bottom: 1rem; text-transform: uppercase; letter-spacing: .5px;
}
.card h3 { margin-bottom: .6rem; }
.card p { color: var(--gray-700); font-size: .95rem; margin-bottom: 1rem; }
.card ul { list-style: none; margin-bottom: 1.2rem; }
.card ul li { padding: .25rem 0; padding-left: 1.4rem; position: relative; color: var(--gray-700); font-size: .9rem; }
.card ul li::before { content: "✓"; color: var(--red); position: absolute; left: 0; font-weight: 700; }

.card-link { color: var(--red); font-weight: 600; font-size: .9rem; }
.card-link:hover { text-decoration: underline; }

/* Large category cards */
.category-card {
  text-align: center; padding: 0;
}
.category-card .card-img {
  width: 100%; height: 200px; object-fit: cover; border-radius: 10px 10px 0 0;
}
.category-card .card-body { padding: 1.5rem 2rem 2rem; }
.category-icon {
  width: 64px; height: 64px; background: var(--red-light); border-radius: 16px;
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 1.2rem; font-size: 1.8rem;
}

/* Product card images */
.card .product-img-wrap {
  width: 100%; height: 180px; overflow: hidden; border-radius: 10px 10px 0 0;
  margin: -2rem -2rem 1.5rem -2rem; width: calc(100% + 4rem);
  background: var(--gray-50); display: flex; align-items: center; justify-content: center;
}
.card .product-img-wrap img {
  width: 100%; height: 100%; object-fit: contain; padding: 1rem;
  transition: transform .3s ease;
}
.card:hover .product-img-wrap img { transform: scale(1.05); }

/* Molecular controls placeholder */
.mc-placeholder {
  width: calc(100% + 4rem); height: 180px; margin: -2rem -2rem 1.5rem -2rem;
  border-radius: 10px 10px 0 0;
  display: flex; align-items: center; justify-content: center; flex-direction: column;
  color: white; font-weight: 600; font-size: 1rem; text-align: center; padding: 1rem;
}
.mc-placeholder .mc-icon { font-size: 2.5rem; margin-bottom: .5rem; opacity: .9; }
.mc-placeholder .mc-label { font-size: .85rem; opacity: .8; text-transform: uppercase; letter-spacing: 1px; }

/* Page header with image */
.page-header-hero {
  background: linear-gradient(rgba(0,0,0,0.6), rgba(0,0,0,0.5)), url('images/hero-science.jpg') center/cover no-repeat;
  padding: 4.5rem 1.5rem; text-align: center; color: white;
}
.page-header-hero h1 { color: white; }
.page-header-hero p { color: rgba(255,255,255,.85); max-width: 600px; margin: .6rem auto 0; }

/* About image section */
.about-img-section { position: relative; border-radius: 12px; overflow: hidden; }
.about-img-section img { width: 100%; height: 300px; object-fit: cover; border-radius: 12px; }

/* === ABOUT SNIPPET === */
.about-row { display: grid; grid-template-columns: 1fr 1fr; gap: 3rem; align-items: center; }
.about-row .stat-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.2rem; margin-top: 1.5rem; }
.stat-box { background: var(--gray-50); padding: 1.2rem; border-radius: 8px; text-align: center; }
.stat-box .num { font-family: 'Playfair Display', serif; font-size: 2rem; color: var(--red); font-weight: 700; }
.stat-box .label { font-size: .85rem; color: var(--gray-500); }

/* === CTA SECTION === */
.cta-section {
  background: var(--dark); color: var(--white); text-align: center; padding: 4rem 1.5rem;
}
.cta-section h2 { color: var(--white); margin-bottom: 1rem; }
.cta-section p { color: var(--gray-300); max-width: 550px; margin: 0 auto 2rem; }

/* === FOOTER === */
.footer {
  background: var(--gray-900); color: var(--gray-300); padding: 3.5rem 1.5rem 2rem;
}
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.3fr; gap: 2.5rem; margin-bottom: 2.5rem; }
.footer h4 { color: var(--white); font-family: 'Inter', sans-serif; font-size: 1rem; margin-bottom: 1rem; }
.footer ul { list-style: none; }
.footer ul li { margin-bottom: .5rem; }
.footer ul a { color: var(--gray-300); font-size: .9rem; }
.footer ul a:hover { color: var(--white); }
.footer ul li { display: flex; align-items: center; }
.footer ul li i { flex-shrink: 0; }
.footer-brand p { font-size: .9rem; margin-top: .8rem; }
.footer-bottom { border-top: 1px solid var(--gray-700); padding-top: 1.5rem; text-align: center; font-size: .85rem; }

/* === CONTACT FORM === */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 3rem; }
.form-group { margin-bottom: 1.2rem; }
.form-group label { display: block; font-weight: 500; margin-bottom: .4rem; font-size: .9rem; }
.form-group input, .form-group select, .form-group textarea {
  width: 100%; padding: .7rem 1rem; border: 1px solid var(--gray-300); border-radius: 6px;
  font-family: inherit; font-size: .95rem; transition: border-color .2s;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  outline: none; border-color: var(--red); box-shadow: 0 0 0 3px rgba(230,48,40,.1);
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.checkbox-group { display: flex; flex-wrap: wrap; gap: 1rem; margin-bottom: 1.2rem; }
.checkbox-group label { display: flex; align-items: center; gap: .4rem; font-size: .9rem; cursor: pointer; }

.contact-info-card {
  background: var(--gray-50); border-radius: 10px; padding: 2rem; margin-bottom: 1.5rem;
}
.contact-info-card h4 { margin-bottom: .8rem; }
.contact-info-card p { color: var(--gray-700); font-size: .95rem; margin-bottom: .4rem; }

/* === PAGE HEADER === */
.page-header {
  background: linear-gradient(135deg, var(--gray-50), var(--white));
  padding: 3.5rem 1.5rem; text-align: center;
}
.page-header p { color: var(--gray-500); max-width: 600px; margin: .6rem auto 0; }

/* === DETAIL PAGE === */
.product-detail { padding: 3rem 0; }
.product-hero-text h2 { margin-bottom: .5rem; }
.product-hero-text p.lead { font-size: 1.1rem; color: var(--gray-500); margin-bottom: 1.5rem; }
.feature-list { list-style: none; margin: 1.5rem 0; }
.feature-list li { padding: .5rem 0 .5rem 1.6rem; position: relative; }
.feature-list li::before { content: "✓"; color: var(--red); position: absolute; left: 0; font-weight: 700; }

/* === MISSION / VALUES === */
.values-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px,1fr)); gap: 1.5rem; }
.value-card { background: var(--white); border: 1px solid var(--gray-300); border-radius: 10px; padding: 1.8rem; text-align: center; }
.value-icon { font-size: 2rem; margin-bottom: .8rem; }

/* === RESPONSIVE — TABLET (max 1024px) === */
@media (max-width: 1024px) {
  .container { padding: 0 1.2rem; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 2rem; }
  .about-row { gap: 2rem; }
  .stat-grid { gap: .8rem; }
}

/* === RESPONSIVE — MOBILE (max 768px) === */
@media (max-width: 768px) {
  /* Nav */
  .nav-links {
    display: none; position: absolute; top: 100%; left: 0; right: 0;
    background: var(--white); flex-direction: column; padding: 1.5rem; gap: 1rem;
    border-bottom: 1px solid var(--gray-300); box-shadow: 0 4px 12px rgba(0,0,0,.08);
  }
  .nav-links.open { display: flex; }
  .hamburger { display: block; }
  .nav-dropdown .dropdown-menu {
    position: static; box-shadow: none; border: none; padding-left: 1rem;
    display: none; min-width: auto;
  }
  .nav-dropdown:hover .dropdown-menu,
  .nav-dropdown.open .dropdown-menu { display: block; }

  /* Hero */
  .hero { padding: 3rem 1.5rem; }
  .hero h1 { font-size: clamp(1.6rem, 7vw, 2.4rem); }
  .hero p { font-size: 1rem; }

  /* Page header hero */
  .page-header-hero { padding: 3rem 1.5rem; }
  .page-header-hero h1 { font-size: clamp(1.6rem, 7vw, 2.2rem); }

  /* Sections */
  .section { padding: 3rem 1rem; }
  .section-title { font-size: clamp(1.3rem, 5vw, 1.8rem); }
  .section-sub { font-size: .9rem; }

  /* Grids → single column */
  .about-row, .contact-grid { grid-template-columns: 1fr; }
  .card-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .values-grid { grid-template-columns: 1fr; }

  /* Footer */
  .footer-grid { grid-template-columns: 1fr; gap: 1.5rem; }
  .footer { padding: 2.5rem 1.2rem 1.5rem; }

  /* Stats */
  .stat-grid { grid-template-columns: 1fr 1fr; gap: .8rem; }
  .stat-box { padding: 1rem; }
  .stat-box .num { font-size: 1.6rem; }

  /* Cards */
  .card { padding: 1.5rem; }
  .card .product-img-wrap {
    margin: -1.5rem -1.5rem 1.2rem -1.5rem;
    width: calc(100% + 3rem);
    height: 160px;
  }
  .category-card .card-img { height: 180px; }
  .category-card .card-body { padding: 1.2rem 1.5rem 1.5rem; }

  /* Buttons */
  .btn { padding: .65rem 1.5rem; font-size: .9rem; }
  .btn-group { flex-direction: column; align-items: stretch; gap: .8rem; }
  .btn-group .btn { text-align: center; }

  /* CTA section */
  .cta-section { padding: 3rem 1.2rem; }
  .cta-section h2 { font-size: clamp(1.3rem, 5vw, 1.8rem); }
  .cta-section .btn-group { flex-direction: column; align-items: center; }
  .cta-section .btn-group .btn { min-width: 260px; }

  /* MC placeholder cards */
  .mc-placeholder {
    width: calc(100% + 3rem);
    margin: -1.5rem -1.5rem 1.2rem -1.5rem;
    height: 140px;
  }

  /* Typography */
  h1 { font-size: clamp(1.6rem, 7vw, 2.4rem); }
  h2 { font-size: clamp(1.3rem, 5vw, 1.8rem); }
  h3 { font-size: 1.1rem; }
}

/* === RESPONSIVE — SMALL MOBILE (max 480px) === */
@media (max-width: 480px) {
  .container { padding: 0 1rem; }
  .section { padding: 2.5rem .8rem; }
  .stat-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .hero { padding: 2.5rem 1rem; }
  .nav-inner { padding: .6rem 1rem; }
  .nav-logo { font-size: 1.1rem; }
  .nav-logo img { height: 32px; width: 32px; }
}

/* Molecular Controls photo overlay cards */
.mc-overlay {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: linear-gradient(135deg, rgba(230,48,40,0.75), rgba(0,0,0,0.6));
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.3s ease;
}
.mc-placeholder:hover .mc-overlay {
  background: linear-gradient(135deg, rgba(230,48,40,0.85), rgba(0,0,0,0.7));
}
.mc-placeholder {
  position: relative;
  height: 180px;
  border-radius: 12px 12px 0 0;
  overflow: hidden;
}
.mc-overlay .mc-label {
  color: #fff;
  font-size: 1.1rem;
  font-weight: 700;
  text-align: center;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  text-shadow: 0 2px 4px rgba(0,0,0,0.3);
}