/* =============================================
   GREEN DRAIN - MAIN STYLESHEET
   Design reference: seed.com
   Mobile-first responsive approach
   ============================================= */

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

:root {
  /* Colors */
  --color-green-dark: #1a3c1a;
  --color-green-mid: #2d5a2d;
  --color-green-soft: #3d6b3d;
  --color-green-light: #e8f0e4;
  --color-cream: #f8f7f2;
  --color-cream-dark: #f0efe6;
  --color-white: #ffffff;
  --color-text-dark: #1a3c1a;
  --color-text-light: #f8f7f2;
  --color-text-muted: rgba(26, 60, 26, 0.7);
  --color-text-light-muted: rgba(248, 247, 242, 0.7);
  --color-border: rgba(26, 60, 26, 0.1);
  --color-border-light: rgba(248, 247, 242, 0.2);

  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-weight-light: 300;
  --font-weight-regular: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;

  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;
  --space-4xl: 80px;
  --space-5xl: 100px;

  /* Layout */
  --container-max: 1200px;
  --container-padding: 20px;

  /* Radius */
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --radius-full: 100px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 300ms ease;
  --transition-slow: 500ms ease;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-primary);
  font-weight: var(--font-weight-regular);
  color: var(--color-text-dark);
  background-color: var(--color-cream);
  line-height: 1.5;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

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

ul, ol {
  list-style: none;
}

/* ----- CONTAINER ----- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

/* ----- PLACEHOLDER IMAGES ----- */
/* Production: hide placeholder sections on greendrains.com only.
   JS adds .prod to <html> when hostname === 'greendrains.com'.
   Staging (any other hostname) never gets .prod — placeholders stay visible. */
.prod .placeholder-img,
.prod figure:has(.placeholder-img),
.prod .industry-solution-visual:has(.placeholder-img),
.prod .industry-image-break:has(.placeholder-img),
.prod .placeholder-about-product,
.prod .article-card-image:has(span):not(:has(img)),
.prod figure:has(.article-figure-img:not(:has(img))) {
  display: none !important;
}

.placeholder-img {
  background: var(--color-cream-dark);
  border: 2px dashed rgba(26, 60, 26, 0.15);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.8rem;
  line-height: 1.4;
  font-weight: var(--font-weight-medium);
}

.placeholder-hero {
  width: 100%;
  aspect-ratio: 1;
  max-width: 500px;
  margin: 0 auto;
}

.placeholder-product {
  width: 100%;
  aspect-ratio: 1;
}

.placeholder-highlight {
  width: 100%;
  aspect-ratio: 1;
}

.highlight-img {
  width: 100%;
  height: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  border-radius: var(--radius-md);
  display: block;
}

.placeholder-howitworks {
  width: 100%;
  aspect-ratio: 1;
  max-width: 350px;
  margin: 0 auto;
  border-color: rgba(248, 247, 242, 0.2);
  color: var(--color-text-light-muted);
  background: rgba(255, 255, 255, 0.05);
}

.placeholder-education {
  width: 100%;
  aspect-ratio: 16/9;
}

.placeholder-industry {
  width: 100%;
  aspect-ratio: 4/3;
}


/* =============================================
   BUTTONS
   ============================================= */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 14px 28px;
  border-radius: var(--radius-full);
  font-family: var(--font-primary);
  font-size: 0.9rem;
  font-weight: var(--font-weight-medium);
  letter-spacing: -0.01em;
  line-height: 1;
  border: none;
  cursor: pointer;
  transition: opacity var(--transition-base), transform var(--transition-fast);
  white-space: nowrap;
}

.btn:hover {
  opacity: 0.85;
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--color-green-dark);
  color: var(--color-text-light);
}

.btn-secondary {
  background: var(--color-green-dark);
  color: var(--color-text-light);
  padding: 10px 22px;
  font-size: 0.85rem;
}

.btn-light {
  background: var(--color-cream);
  color: var(--color-green-dark);
}

.btn-outline-light {
  background: transparent;
  color: var(--color-cream);
  border: 1.5px solid rgba(248, 247, 242, 0.4);
}

.btn-outline-light:hover {
  background: rgba(248, 247, 242, 0.1);
}

.btn-sm {
  padding: 10px 20px;
  font-size: 0.85rem;
}

.btn-text {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.9rem;
  font-weight: var(--font-weight-medium);
  color: var(--color-text-dark);
  border-bottom: 1px solid currentColor;
  padding-bottom: 2px;
  transition: opacity var(--transition-base);
}

.btn-text:hover {
  opacity: 0.7;
}

.btn-text.light {
  color: var(--color-text-light);
}


/* =============================================
   SECTION 1: ANNOUNCEMENT BAR
   ============================================= */
.announcement-bar {
  background: var(--color-green-dark);
  text-align: center;
  padding: 10px var(--container-padding);
}

.announcement-bar a {
  color: var(--color-text-light);
  font-size: 0.8rem;
  font-weight: var(--font-weight-medium);
  letter-spacing: 0.02em;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: opacity var(--transition-base);
}

.announcement-bar a:hover {
  opacity: 0.8;
}


/* =============================================
   SECTION 2: NAVIGATION
   ============================================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--color-cream);
  border-bottom: 1px solid var(--color-border);
  transition: background var(--transition-base), box-shadow var(--transition-base);
}

.site-header.scrolled {
  background: rgba(248, 247, 242, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

/* When mobile menu is open, remove backdrop-filter so the
   fixed-position overlay isn't trapped inside the header */
.site-header.menu-open {
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  background: var(--color-cream);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  height: 60px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 8px;
}

.logo-text {
  font-size: 1.2rem;
  font-weight: var(--font-weight-semibold);
  color: var(--color-green-dark);
  letter-spacing: -0.02em;
}

.nav-links {
  display: none;
  gap: var(--space-xl);
}

.nav-link {
  font-size: 0.9rem;
  font-weight: var(--font-weight-regular);
  color: var(--color-text-dark);
  transition: opacity var(--transition-base);
}

.nav-link:hover {
  opacity: 0.7;
}

/* Dropdown wrapper */
.nav-dropdown {
  position: relative;
}

.nav-dropdown-trigger {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 0.9rem;
  font-weight: var(--font-weight-regular);
  color: var(--color-text-dark);
  transition: opacity var(--transition-base);
  cursor: pointer;
  background: none;
  border: none;
  padding: 0;
  font-family: inherit;
}

.nav-dropdown-trigger:hover {
  opacity: 0.7;
}

.nav-dropdown-arrow {
  width: 8px;
  height: 8px;
  transition: transform 0.2s ease;
}

.nav-dropdown.open .nav-dropdown-arrow {
  transform: rotate(180deg);
}

/* Dropdown menu - desktop */
.dropdown-menu {
  display: none;
  position: absolute;
  top: calc(100% + 12px);
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-cream);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 8px 0;
  min-width: 200px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
  z-index: 1002;
  opacity: 0;
  transition: opacity 0.15s ease;
}

/* Invisible bridge so mouse can travel from trigger to menu */
.dropdown-menu::before {
  content: '';
  position: absolute;
  top: -12px;
  left: 0;
  right: 0;
  height: 12px;
}

.nav-dropdown.open .dropdown-menu {
  display: block;
  opacity: 1;
}

.dropdown-menu a {
  display: block;
  padding: 8px 20px;
  font-size: 0.85rem;
  color: var(--color-text-dark);
  transition: background 0.15s ease, color 0.15s ease;
  white-space: nowrap;
}

.dropdown-menu a:hover {
  background: var(--color-green-light);
  color: var(--color-green-dark);
}

.dropdown-divider {
  height: 1px;
  background: var(--color-border);
  margin: 4px 0;
}

.nav-actions {
  display: none;
  align-items: center;
  gap: var(--space-lg);
}

.nav-contact {
  font-size: 0.85rem;
}

/* Mobile hamburger */
.nav-toggle {
  display: flex;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  z-index: 1001;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-green-dark);
  border-radius: 2px;
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.nav-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile menu overlay */
.nav-links.mobile-open {
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--color-cream);
  z-index: 999;
  padding: 100px var(--container-padding) var(--space-2xl);
  gap: 0;
  overflow-y: auto;
}

.nav-links.mobile-open .nav-dropdown {
  border-bottom: 1px solid var(--color-border);
}

.nav-links.mobile-open .nav-dropdown-trigger {
  font-size: 1.5rem;
  font-weight: var(--font-weight-light);
  padding: var(--space-md) 0;
  width: 100%;
  justify-content: space-between;
}

.nav-links.mobile-open .nav-dropdown-arrow {
  width: 12px;
  height: 12px;
}

.nav-links.mobile-open .dropdown-menu {
  position: static;
  transform: none;
  border: none;
  border-radius: 0;
  box-shadow: none;
  padding: 0 0 var(--space-md) var(--space-md);
  min-width: 0;
  background: transparent;
}

.nav-links.mobile-open .dropdown-menu::before {
  display: none;
}

.nav-links.mobile-open .dropdown-menu a {
  font-size: 1.1rem;
  padding: var(--space-sm) 0;
  font-weight: var(--font-weight-light);
  color: var(--color-text-muted);
}

.nav-links.mobile-open .dropdown-menu a:hover {
  background: transparent;
  color: var(--color-green-dark);
}

.nav-links.mobile-open .dropdown-divider {
  display: none;
}


/* =============================================
   SECTION 3: HERO
   ============================================= */
.hero {
  padding: var(--space-3xl) 0 var(--space-4xl);
  background: linear-gradient(180deg, var(--color-cream) 0%, var(--color-green-light) 100%);
  min-height: 70vh;
  display: flex;
  align-items: center;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2xl);
  align-items: center;
}

.hero-product-image {
  width: 100%;
  height: auto;
  display: block;
  object-fit: contain;
  max-height: 340px;
  margin: 0 auto;
}

@media (min-width: 1024px) {
  .hero-product-image {
    max-height: none;
  }
}

.hero-label {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: var(--font-weight-medium);
  letter-spacing: 0.03em;
  color: var(--color-text-muted);
  padding: 6px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-lg);
}

.hero-headline {
  font-size: 2.2rem;
  font-weight: var(--font-weight-light);
  line-height: 1.1;
  letter-spacing: -0.03em;
  color: var(--color-green-dark);
  margin-bottom: var(--space-lg);
}

.hero-subtitle {
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text-muted);
  max-width: 480px;
  margin-bottom: var(--space-xl);
}

.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-lg);
}


/* =============================================
   SECTION 4: PRODUCT CAROUSEL
   ============================================= */
.products-section {
  background: var(--color-green-dark);
  padding: var(--space-3xl) 0;
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
}

.section-header-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
  margin-bottom: var(--space-2xl);
}

.section-headline {
  font-size: 1.8rem;
  font-weight: var(--font-weight-light);
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.section-headline.light {
  color: var(--color-text-light);
}

.section-subtitle {
  font-size: 0.95rem;
  line-height: 1.5;
  color: var(--color-text-muted);
}

.section-subtitle.light {
  color: var(--color-text-light-muted);
}

.section-body {
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text-muted);
}

.section-body.light {
  color: var(--color-text-light-muted);
}

.product-cards-scroll {
  overflow: visible;
  padding: 0;
}

.product-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
  padding: 0 var(--container-padding);
  max-width: var(--container-max);
  margin: 0 auto;
}

.product-card {
  display: flex;
  flex-direction: column;
  background: var(--color-green-mid);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  min-width: 0;
  position: relative;
  transition: transform var(--transition-base);
  text-decoration: none;
}

.product-card:hover {
  transform: translateY(-4px);
}

.product-badge {
  position: absolute;
  top: var(--space-md);
  left: var(--space-md);
  background: var(--color-cream);
  color: var(--color-green-dark);
  font-size: 0.7rem;
  font-weight: var(--font-weight-semibold);
  padding: 4px 10px;
  border-radius: var(--radius-full);
  letter-spacing: 0.02em;
}

.badge-best {
  background: #d3fa99;
}

.product-card-top {
  margin-bottom: var(--space-md);
}

.product-model {
  font-size: 0.8rem;
  font-weight: var(--font-weight-medium);
  color: var(--color-text-light-muted);
  letter-spacing: 0.05em;
}

.product-name {
  font-size: 1.1rem;
  font-weight: var(--font-weight-medium);
  color: var(--color-text-light);
  margin-top: var(--space-xs);
}

.product-card-media {
  flex: 1;
  margin-bottom: var(--space-lg);
}

.product-card-bottom {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.product-use {
  font-size: 0.75rem;
  color: var(--color-text-light-muted);
}


/* =============================================
   SECTION 5: PRODUCT HIGHLIGHT
   ============================================= */
.highlight-section {
  padding: var(--space-4xl) 0;
  background: var(--color-cream);
}

.highlight-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2xl);
  align-items: center;
}

.highlight-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: var(--font-weight-semibold);
  color: var(--color-green-dark);
  background: var(--color-green-light);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-lg);
}

.highlight-content .section-headline {
  margin-bottom: var(--space-md);
}

.highlight-content .section-body {
  margin-bottom: var(--space-xl);
}

.highlight-image-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
}


/* =============================================
   SECTION 6: HOW IT WORKS
   ============================================= */
.howitworks-section {
  background: var(--color-green-dark);
  padding: var(--space-4xl) 0;
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
}

.howitworks-header {
  text-align: center;
  margin-bottom: var(--space-3xl);
}

.howitworks-label {
  font-size: 0.8rem;
  font-weight: var(--font-weight-medium);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-light-muted);
  margin-bottom: var(--space-lg);
}

.howitworks-headline {
  font-size: 2rem;
  max-width: 600px;
  margin: 0 auto;
}

.howitworks-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2xl);
  align-items: start;
}

.howitworks-col-title {
  font-size: 0.75rem;
  font-weight: var(--font-weight-semibold);
  letter-spacing: 0.15em;
  color: var(--color-text-light);
  margin-bottom: var(--space-lg);
}

.howitworks-list li {
  color: var(--color-text-light-muted);
  font-size: 0.95rem;
  line-height: 1.5;
  padding: var(--space-sm) 0;
  border-bottom: 1px solid var(--color-border-light);
}

.howitworks-visual {
  text-align: center;
}

.howitworks-stat {
  margin-top: var(--space-2xl);
  padding-bottom: var(--space-xl);
  text-align: center;
  display: block;
  width: 100%;
}

.stat-number {
  display: block;
  font-size: 2.5rem;
  font-weight: var(--font-weight-light);
  color: #d3fa99;
  letter-spacing: -0.02em;
}

.stat-label {
  display: block;
  font-size: 0.85rem;
  color: var(--color-text-light-muted);
  margin-top: var(--space-xs);
}


/* =============================================
   SECTION 7: EDUCATION
   ============================================= */
.education-section {
  padding: var(--space-4xl) 0;
  background: var(--color-cream);
}

.education-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2xl);
  align-items: center;
}

.education-label {
  display: block;
  font-size: 0.75rem;
  font-weight: var(--font-weight-semibold);
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-lg);
}

.education-content .section-headline {
  margin-bottom: var(--space-md);
}

.education-content .section-body {
  margin-bottom: var(--space-xl);
}


/* =============================================
   SECTION 8: INDUSTRY GRID
   ============================================= */
.industry-section {
  padding: var(--space-4xl) 0;
  background: var(--color-cream-dark);
}

.section-header-center {
  text-align: center;
  max-width: 600px;
  margin: 0 auto var(--space-2xl);
}

.section-header-center .section-subtitle {
  margin-top: var(--space-md);
}

.industry-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
}

.industry-card {
  background: var(--color-white);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.industry-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(26, 60, 26, 0.08);
}

.industry-card-title {
  font-size: 0.95rem;
  font-weight: var(--font-weight-medium);
  padding: var(--space-md) var(--space-md) var(--space-xs);
}

.industry-card-desc {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  padding: 0 var(--space-md) var(--space-md);
}

.industry-card-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  display: block;
}

.section-cta-center {
  text-align: center;
  margin-top: var(--space-2xl);
}


/* =============================================
   SECTION 9: CERTIFICATIONS
   ============================================= */
.certs-section {
  padding: var(--space-3xl) 0;
  background: var(--color-cream);
  border-top: 1px solid var(--color-border);
}

.certs-content {
  text-align: center;
  margin-bottom: var(--space-2xl);
}

.certs-headline {
  font-size: 1.4rem;
  font-weight: var(--font-weight-light);
  letter-spacing: -0.02em;
  margin-bottom: var(--space-md);
}

/* Marquee container with edge fade */
.certs-marquee {
  position: relative;
  overflow: hidden;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
}

.certs-marquee-track {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
  width: max-content;
  animation: marquee-scroll 25s linear infinite;
}

.certs-marquee:hover .certs-marquee-track {
  animation-play-state: paused;
}

@keyframes marquee-scroll {
  0% {
    transform: translateX(0);
  }
  100% {
    transform: translateX(-25%);
  }
}

.cert-logo {
  width: 120px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.cert-logo img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}

/* Reduced motion: disable marquee, show static grid */
@media (prefers-reduced-motion: reduce) {
  .certs-marquee {
    -webkit-mask-image: none;
    mask-image: none;
  }

  .certs-marquee-track {
    animation: none;
    flex-wrap: wrap;
    justify-content: center;
    width: auto;
  }
}


/* =============================================
   SECTION 10: TESTIMONIALS
   ============================================= */
.testimonials-section {
  padding: var(--space-4xl) 0;
  background: var(--color-cream);
}

.testimonials-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
}

.testimonial-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
}

.testimonial-quote {
  font-size: 1rem;
  font-weight: var(--font-weight-light);
  line-height: 1.6;
  color: var(--color-text-dark);
  margin-bottom: var(--space-lg);
  font-style: italic;
}

.testimonial-name {
  font-size: 0.9rem;
  font-weight: var(--font-weight-medium);
}

.testimonial-org {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-top: 2px;
}

.testimonial-tag {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: var(--font-weight-semibold);
  color: var(--color-green-dark);
  background: var(--color-green-light);
  padding: 3px 10px;
  border-radius: var(--radius-full);
  margin-top: var(--space-sm);
}


/* =============================================
   SECTION 11: RESEARCH CALLOUT
   ============================================= */
.research-section {
  background: var(--color-green-mid);
  padding: var(--space-4xl) 0;
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
}

.research-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2xl);
}

.research-content .section-headline {
  margin-bottom: var(--space-md);
}

.research-content .section-body {
  margin-bottom: var(--space-xl);
}

.research-study {
  padding: var(--space-lg);
  background: rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-md);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.study-tag {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: var(--font-weight-semibold);
  letter-spacing: 0.05em;
  color: #d3fa99;
  margin-bottom: var(--space-sm);
}

.study-title {
  font-size: 0.9rem;
  font-weight: var(--font-weight-regular);
  color: var(--color-text-light);
  line-height: 1.5;
}


/* =============================================
   SECTION 12: CTA BANNER
   ============================================= */
.cta-section {
  background: var(--color-green-dark);
  padding: var(--space-4xl) 0;
  text-align: center;
}

.cta-headline {
  font-size: 2rem;
  font-weight: var(--font-weight-light);
  color: var(--color-text-light);
  letter-spacing: -0.02em;
  margin-bottom: var(--space-md);
}

.cta-subtitle {
  font-size: 1rem;
  color: var(--color-text-light-muted);
  margin-bottom: var(--space-xl);
}

.cta-buttons {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-md);
}


/* =============================================
   SECTION 13: FOOTER
   Matches seed.com mobile-first footer pattern
   ============================================= */
.site-footer {
  background: var(--color-green-dark);
  color: var(--color-text-light);
  padding: var(--space-3xl) 0 var(--space-xl);
}

/* Brand */
.footer-brand {
  text-align: center;
  margin-bottom: var(--space-2xl);
}

.footer-logo {
  font-size: 1.3rem;
  font-weight: var(--font-weight-semibold);
  letter-spacing: -0.02em;
  display: block;
}

.footer-tagline {
  font-size: 1.1rem;
  font-weight: var(--font-weight-light);
  color: var(--color-text-light);
  line-height: 1.4;
  margin-top: var(--space-lg);
  max-width: 400px;
  margin-left: auto;
  margin-right: auto;
}

/* Newsletter */
.footer-newsletter {
  margin-bottom: var(--space-2xl);
}

.footer-newsletter-title {
  font-size: 0.9rem;
  font-weight: var(--font-weight-medium);
  margin-bottom: var(--space-xs);
}

.footer-newsletter-subtitle {
  font-size: 0.8rem;
  color: var(--color-text-light-muted);
  margin-bottom: var(--space-md);
}

.newsletter-form {
  max-width: 100%;
}

.newsletter-input-wrap {
  display: flex;
  align-items: center;
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-full);
  padding: 4px 4px 4px 20px;
  transition: border-color var(--transition-base);
}

.newsletter-input-wrap:focus-within {
  border-color: rgba(248, 247, 242, 0.5);
}

.newsletter-input {
  flex: 1;
  padding: 10px 0;
  border: none;
  background: transparent;
  color: var(--color-text-light);
  font-family: var(--font-primary);
  font-size: 0.9rem;
  outline: none;
  min-width: 0;
}

.newsletter-input::placeholder {
  color: var(--color-text-light-muted);
}

.newsletter-submit {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--color-border-light);
  background: transparent;
  color: var(--color-text-light);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  flex-shrink: 0;
  transition: background var(--transition-base), border-color var(--transition-base);
}

.newsletter-submit:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(248, 247, 242, 0.4);
}

/* Footer columns - 2 column grid on mobile like seed.com */
.footer-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl) var(--space-lg);
  margin-bottom: var(--space-2xl);
}

.footer-col {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer-col-title {
  font-size: 0.7rem;
  font-weight: var(--font-weight-semibold);
  letter-spacing: 0.08em;
  color: var(--color-text-light-muted);
  margin-bottom: var(--space-xs);
}

.footer-col a {
  font-size: 0.9rem;
  font-weight: var(--font-weight-regular);
  color: var(--color-text-light);
  transition: opacity var(--transition-base);
}

.footer-col a:hover {
  opacity: 0.7;
}

/* Footer bottom */
.footer-bottom {
  padding-top: var(--space-xl);
  border-top: 1px solid var(--color-border-light);
  font-size: 0.75rem;
  color: var(--color-text-light-muted);
  text-align: center;
}


/* =============================================
   RESPONSIVE: TABLET (481px+)
   ============================================= */
@media (min-width: 481px) {
  :root {
    --container-padding: 32px;
  }

  .hero-headline {
    font-size: 2.8rem;
  }

  .section-headline {
    font-size: 2.2rem;
  }

  .howitworks-headline {
    font-size: 2.4rem;
  }

  .industry-grid {
    grid-template-columns: repeat(3, 1fr);
  }

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

  .footer-columns {
    grid-template-columns: repeat(3, 1fr);
  }

  .newsletter-form {
    max-width: 440px;
  }

  .cta-headline {
    font-size: 2.4rem;
  }
}


/* =============================================
   RESPONSIVE: DESKTOP (1024px+)
   ============================================= */
@media (min-width: 1024px) {
  :root {
    --container-padding: 40px;
  }

  /* Nav */
  .nav-links {
    display: flex;
    align-items: center;
  }

  .nav-actions {
    display: flex;
  }

  .nav-toggle {
    display: none;
  }

  /* Hero */
  .hero {
    min-height: 85vh;
    padding: var(--space-5xl) 0;
  }

  .hero-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
  }

  .hero-headline {
    font-size: 3.5rem;
  }

  .hero-subtitle {
    font-size: 1.1rem;
  }

  /* Products */
  .products-section {
    padding: var(--space-4xl) 0;
  }

  .section-header-row {
    grid-template-columns: 1fr 1fr;
    align-items: end;
  }

  .section-header-meta {
    text-align: right;
  }

  .product-cards {
    grid-template-columns: repeat(4, 1fr);
  }

  /* Highlight */
  .highlight-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
  }

  /* How It Works */
  .howitworks-headline {
    font-size: 2.8rem;
  }

  .howitworks-layout {
    grid-template-columns: 1fr 1.2fr 1fr;
    gap: var(--space-2xl);
    align-items: center;
  }

  /* Education */
  .education-grid {
    grid-template-columns: 1fr 1.2fr;
    gap: var(--space-3xl);
  }

  /* Industry */
  .industry-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  /* Sections general */
  .section-headline {
    font-size: 2.8rem;
  }

  /* Testimonials */
  .testimonials-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  /* Research */
  .research-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    align-items: center;
  }

  /* CTA */
  .cta-headline {
    font-size: 3rem;
  }

  /* Footer */
  .footer-brand {
    text-align: left;
  }

  .footer-tagline {
    margin-left: 0;
    margin-right: 0;
  }

  .footer-columns {
    grid-template-columns: repeat(4, 1fr);
  }

  .certs-headline {
    font-size: 1.8rem;
  }
}


/* =============================================
   REGION SWITCHER
   Geo-detection banner + region selector
   ============================================= */

/* --- Geo Banner --- */
.region-banner {
  background: var(--color-cream-dark);
  border-bottom: 1px solid var(--color-border);
  padding: 12px var(--container-padding);
  animation: regionBannerSlide 0.4s ease forwards;
}

@keyframes regionBannerSlide {
  from { transform: translateY(-100%); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

@media (prefers-reduced-motion: reduce) {
  .region-banner { animation: none; }
}

.region-banner-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  flex-wrap: wrap;
  font-size: 0.85rem;
  color: var(--color-text-dark);
}

.region-banner-text {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.region-banner-actions {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.region-banner-switch {
  background: var(--color-green-dark);
  color: var(--color-text-light);
  border: none;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: var(--font-weight-medium);
  font-family: var(--font-primary);
  cursor: pointer;
  transition: opacity var(--transition-fast);
}

.region-banner-switch:hover {
  opacity: 0.85;
}

.region-banner-dismiss {
  background: none;
  border: none;
  color: var(--color-text-muted);
  font-size: 0.8rem;
  font-family: var(--font-primary);
  cursor: pointer;
  padding: 6px 12px;
  transition: color var(--transition-fast);
}

.region-banner-dismiss:hover {
  color: var(--color-text-dark);
}

/* --- Region Selector (Desktop) --- */
.region-selector {
  position: relative;
  display: flex;
  align-items: center;
}

.region-selector-btn svg,
.region-selector-option svg,
.region-selector-mobile button svg,
.region-banner-text svg {
  flex-shrink: 0;
  display: inline-block;
}

.region-selector-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  padding: 5px 12px;
  font-size: 0.8rem;
  font-weight: var(--font-weight-medium);
  font-family: var(--font-primary);
  color: var(--color-text-dark);
  cursor: pointer;
  transition: border-color var(--transition-fast), background var(--transition-fast);
  white-space: nowrap;
}

.region-selector-btn:hover {
  border-color: var(--color-green-mid);
  background: var(--color-green-light);
}

.region-selector-dropdown {
  display: none;
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  background: var(--color-cream);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
  min-width: 160px;
  z-index: 1001;
  padding: 6px 0;
}

.region-selector.open .region-selector-dropdown {
  display: block;
}

.region-selector-option {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  width: 100%;
  background: none;
  border: none;
  padding: 8px 16px;
  font-size: 0.85rem;
  font-family: var(--font-primary);
  color: var(--color-text-dark);
  cursor: pointer;
  transition: background var(--transition-fast);
}

.region-selector-option:hover {
  background: var(--color-green-light);
}

.region-selector-option.active {
  font-weight: var(--font-weight-semibold);
  color: var(--color-green-dark);
}

/* --- Region Selector (Mobile) --- */
.region-selector-mobile {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  padding: var(--space-lg) 0;
  margin-top: var(--space-md);
  border-top: 1px solid var(--color-border);
  font-size: 1rem;
}

.region-selector-mobile span {
  color: var(--color-text-muted);
}

.region-selector-mobile button {
  background: none;
  border: none;
  font-size: 1rem;
  font-family: var(--font-primary);
  cursor: pointer;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast);
}

.region-selector-mobile button:hover {
  background: var(--color-green-light);
}

.region-selector-mobile button.active {
  font-weight: var(--font-weight-semibold);
  color: var(--color-green-dark);
}

@media (min-width: 1024px) {
  .region-selector-mobile {
    display: none;
  }
}

/* ── Form submission messages ─────────────────────────────── */
.form-message {
  padding: 14px 18px;
  border-radius: 8px;
  font-size: 0.95rem;
  line-height: 1.5;
  margin-bottom: 16px;
}
.form-message--success {
  background: #f0faf0;
  border: 1px solid #4caf50;
  color: #2d5a2d;
}
.form-message--error {
  background: #fff5f5;
  border: 1px solid #e53e3e;
  color: #c53030;
}
