/* ==========================================================================
   JSK (Jason Soft Korea) Official Homepage Stylesheet
   Design System: Navy & Green Modern Tech Aesthetic
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Design Tokens & CSS Variables
   -------------------------------------------------------------------------- */
:root {
  /* Color Palette */
  --clr-primary-900: #0f172a; /* Deep Navy */
  --clr-primary-800: #1e293b;
  --clr-primary-700: #334155;
  
  --clr-accent-600: #16a34a; /* Brand Green */
  --clr-accent-500: #22c55e;
  --clr-accent-700: #15803d;
  --clr-accent-50: #f0fdf4;
  --clr-accent-100: #dcfce7;

  --clr-bg-main: #ffffff;
  --clr-bg-alt: #f8fafc;
  --clr-bg-card: #ffffff;
  --clr-bg-dark: #0f172a;

  --clr-text-main: #0f172a;
  --clr-text-muted: #475569;
  --clr-text-light: #94a3b8;
  --clr-text-inverse: #ffffff;

  --clr-border: #e2e8f0;
  --clr-border-focus: #22c55e;

  /* Typography */
  --ff-main: 'Pretendard', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  
  /* Spacing */
  --nav-height: 72px;
  --container-max: 1200px;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.08);
  --shadow-md: 0 4px 20px -2px rgba(15, 23, 42, 0.06), 0 2px 6px -1px rgba(15, 23, 42, 0.04);
  --shadow-lg: 0 12px 32px -4px rgba(15, 23, 42, 0.12), 0 4px 12px -2px rgba(15, 23, 42, 0.06);

  /* Transitions */
  --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--ff-main);
  background-color: var(--clr-bg-main);
  color: var(--clr-text-main);
  line-height: 1.6;
  font-weight: 400;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* Focus Visible for Accessibility */
:focus-visible {
  outline: 3px solid var(--clr-border-focus);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* Reduced Motion for Accessibility */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

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

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

button, input, textarea {
  font: inherit;
}

/* Skip link for screen reader accessibility */
.skip-link {
  position: absolute;
  top: -100px;
  left: 20px;
  background: var(--clr-primary-900);
  color: var(--clr-text-inverse);
  padding: 12px 20px;
  z-index: 9999;
  border-radius: var(--radius-sm);
  font-weight: 600;
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 20px;
}

/* --------------------------------------------------------------------------
   3. Layout & Container Utilities
   -------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

.section {
  padding: 96px 0;
}

.section-alt {
  background-color: var(--clr-bg-alt);
}

.section-dark {
  background-color: var(--clr-bg-dark);
  color: var(--clr-text-inverse);
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 64px auto;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background-color: var(--clr-accent-100);
  color: var(--clr-accent-700);
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  margin-bottom: 16px;
}

.section-title {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--clr-primary-900);
  letter-spacing: -0.02em;
  line-height: 1.3;
  margin-bottom: 16px;
}

.section-dark .section-title {
  color: var(--clr-text-inverse);
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--clr-text-muted);
  line-height: 1.6;
}

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

/* --------------------------------------------------------------------------
   4. Header & Navigation
   -------------------------------------------------------------------------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--nav-height);
  background-color: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(226, 232, 240, 0.8);
  z-index: 1000;
  transition: background-color var(--transition-normal), box-shadow var(--transition-normal);
}

.site-header.scrolled {
  box-shadow: var(--shadow-sm);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.5rem;
  font-weight: 900;
  color: var(--clr-primary-900);
  letter-spacing: -0.03em;
}

.logo-sub {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--clr-text-muted);
  margin-left: 4px;
}

.logo-accent {
  color: var(--clr-accent-600);
}

.nav-desktop {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-link {
  font-size: 1rem;
  font-weight: 600;
  color: var(--clr-primary-700);
  padding: 8px 4px;
  position: relative;
  transition: color var(--transition-fast);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background-color: var(--clr-accent-600);
  transition: width var(--transition-fast);
}

.nav-link:hover, .nav-link.active {
  color: var(--clr-accent-600);
}

.nav-link:hover::after, .nav-link.active::after {
  width: 100%;
}

/* Mobile Hamburger Toggle */
.mobile-nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  color: var(--clr-primary-900);
  border-radius: var(--radius-sm);
}

.hamburger-icon {
  width: 24px;
  height: 20px;
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.hamburger-bar {
  display: block;
  width: 100%;
  height: 2.5px;
  background-color: var(--clr-primary-900);
  border-radius: 2px;
  transition: transform var(--transition-normal), opacity var(--transition-normal);
}

.mobile-nav-toggle[aria-expanded="true"] .hamburger-bar:nth-child(1) {
  transform: translateY(8.5px) rotate(45deg);
}
.mobile-nav-toggle[aria-expanded="true"] .hamburger-bar:nth-child(2) {
  opacity: 0;
}
.mobile-nav-toggle[aria-expanded="true"] .hamburger-bar:nth-child(3) {
  transform: translateY(-8.5px) rotate(-45deg);
}

/* Mobile Menu Panel */
.mobile-nav-drawer {
  position: fixed;
  top: var(--nav-height);
  left: 0;
  width: 100%;
  background-color: var(--clr-bg-main);
  border-bottom: 1px solid var(--clr-border);
  box-shadow: var(--shadow-lg);
  padding: 24px 0;
  display: flex;
  flex-direction: column;
  gap: 16px;
  transform: translateY(-150%);
  opacity: 0;
  visibility: hidden;
  transition: transform var(--transition-normal), opacity var(--transition-normal), visibility var(--transition-normal);
  z-index: 999;
}

.mobile-nav-drawer.open {
  transform: translateY(0);
  opacity: 1;
  visibility: visible;
}

.mobile-nav-link {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--clr-primary-900);
  padding: 12px 24px;
  display: block;
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.mobile-nav-link:hover, .mobile-nav-link:focus {
  background-color: var(--clr-bg-alt);
  color: var(--clr-accent-600);
}

/* --------------------------------------------------------------------------
   5. Buttons & Interactive Elements
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  font-size: 1rem;
  font-weight: 700;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-normal);
  text-align: center;
  white-space: nowrap;
}

.btn-primary {
  background-color: var(--clr-accent-600);
  color: var(--clr-text-inverse);
  box-shadow: 0 4px 14px rgba(22, 163, 74, 0.25);
}

.btn-primary:hover {
  background-color: var(--clr-accent-700);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(22, 163, 74, 0.35);
}

.btn-secondary {
  background-color: var(--clr-primary-900);
  color: var(--clr-text-inverse);
}

.btn-secondary:hover {
  background-color: var(--clr-primary-800);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-outline {
  background-color: transparent;
  border-color: var(--clr-border);
  color: var(--clr-primary-900);
}

.btn-outline:hover {
  border-color: var(--clr-accent-600);
  color: var(--clr-accent-600);
  background-color: var(--clr-accent-50);
}

.btn-sm {
  padding: 8px 16px;
  font-size: 0.875rem;
  border-radius: var(--radius-sm);
}

.btn-disabled, button:disabled {
  background-color: #f1f5f9;
  color: #94a3b8;
  border-color: #e2e8f0;
  cursor: not-allowed;
  pointer-events: auto;
  box-shadow: none !important;
  transform: none !important;
}

.icon-inline {
  width: 18px;
  height: 18px;
}

/* --------------------------------------------------------------------------
   6. Hero Section
   -------------------------------------------------------------------------- */
.hero-section {
  padding-top: calc(var(--nav-height) + 64px);
  padding-bottom: 96px;
  background: linear-gradient(180deg, #f8fafc 0%, #ffffff 100%);
  position: relative;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 45% 55%;
  gap: 40px;
  align-items: center;
}

.hero-content {
  max-width: 100%;
}

.hero-title {
  font-size: 3rem;
  font-weight: 900;
  color: var(--clr-primary-900);
  line-height: 1.2;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--clr-text-muted);
  line-height: 1.6;
  margin-bottom: 36px;
}

.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.hero-visual {
  position: relative;
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-image-wrapper {
  position: relative;
  width: 100%;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 16px 40px -8px rgba(15, 23, 42, 0.25), 0 0 36px rgba(34, 197, 94, 0.22);
  border: 1px solid rgba(34, 197, 94, 0.25);
  background-color: transparent;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.hero-image-wrapper:hover {
  box-shadow: 0 20px 48px -6px rgba(15, 23, 42, 0.3), 0 0 48px rgba(34, 197, 94, 0.35);
}

.hero-image-wrapper img {
  width: 100%;
  height: auto;
  object-fit: contain;
  display: block;
}

/* --------------------------------------------------------------------------
   7. About Us Section
   -------------------------------------------------------------------------- */
.about-intro-card {
  background-color: var(--clr-bg-main);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-md);
  margin-bottom: 48px;
  border-left: 6px solid var(--clr-accent-600);
}

.about-intro-text {
  font-size: 1.25rem;
  font-weight: 500;
  color: var(--clr-primary-900);
  line-height: 1.7;
}

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

.capability-card {
  background-color: var(--clr-bg-main);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-md);
  padding: 32px 24px;
  text-align: left;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.capability-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--clr-accent-600);
}

.capability-icon-wrapper {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  background-color: var(--clr-accent-50);
  color: var(--clr-accent-600);
  display: flex;
  align-items: center;
  justify-content: center;
}

.capability-icon-wrapper svg {
  width: 28px;
  height: 28px;
}

.capability-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--clr-primary-900);
}

.capability-desc {
  font-size: 0.95rem;
  color: var(--clr-text-muted);
  line-height: 1.5;
}

/* --------------------------------------------------------------------------
   8. Products Section
   -------------------------------------------------------------------------- */
.products-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.product-card {
  background-color: var(--clr-bg-card);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.product-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.product-image-container {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 10;
  background-color: var(--clr-primary-900);
  overflow: hidden;
}

.product-image-container img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-normal);
}

.product-card:hover .product-image-container img {
  transform: scale(1.03);
}

.product-status-tag {
  position: absolute;
  top: 16px;
  right: 16px;
  padding: 6px 12px;
  font-size: 0.75rem;
  font-weight: 700;
  border-radius: var(--radius-full);
  background-color: rgba(15, 23, 42, 0.85);
  color: var(--clr-text-inverse);
  backdrop-filter: blur(4px);
}

.product-status-tag.status-active {
  background-color: var(--clr-accent-600);
  color: #ffffff;
}

.product-status-tag.status-prep {
  background-color: #f59e0b;
  color: #ffffff;
}

.product-body {
  padding: 32px 24px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.product-title {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--clr-primary-900);
  margin-bottom: 8px;
}

.product-subtitle {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--clr-accent-600);
  margin-bottom: 16px;
}

.product-desc {
  font-size: 0.95rem;
  color: var(--clr-text-muted);
  line-height: 1.6;
  margin-bottom: 24px;
  flex-grow: 1;
}

.product-cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: auto;
}

/* --------------------------------------------------------------------------
   9. Farm Block Showcase & Testbeds
   -------------------------------------------------------------------------- */
.farmblock-banner {
  background: linear-gradient(135deg, #0f172a 0%, #064e3b 100%);
  border-radius: var(--radius-lg);
  padding: 48px;
  color: var(--clr-text-inverse);
  margin-bottom: 64px;
  box-shadow: var(--shadow-lg);
}

.farmblock-banner-content {
  max-width: 800px;
}

.farmblock-banner-title {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 16px;
}

.farmblock-banner-desc {
  font-size: 1.125rem;
  color: #e2e8f0;
  line-height: 1.7;
}

.farmblock-features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 64px;
}

.farmblock-feature-card {
  background-color: var(--clr-bg-main);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.feature-icon-box {
  width: 48px;
  height: 48px;
  flex-shrink: 0;
  background-color: var(--clr-accent-100);
  color: var(--clr-accent-700);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
}

.feature-icon-box svg {
  width: 24px;
  height: 24px;
}

.feature-info h4 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--clr-primary-900);
  margin-bottom: 6px;
}

.feature-info p {
  font-size: 0.9rem;
  color: var(--clr-text-muted);
}

/* Testbeds Sub-section */
.testbeds-wrapper {
  margin-top: 64px;
}

.testbeds-title {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--clr-primary-900);
  text-align: center;
  margin-bottom: 32px;
}

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

.testbed-card {
  background-color: var(--clr-bg-main);
  border: 1px solid var(--clr-border);
  border-top: 4px solid var(--clr-accent-600);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  box-shadow: var(--shadow-sm);
}

.testbed-location {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--clr-accent-700);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 8px;
}

.testbed-name {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--clr-primary-900);
  margin-bottom: 12px;
}

/* Farm Block Block Diagram Architecture */
.diagram-image-wrapper {
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.diagram-image-wrapper:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px -4px rgba(15, 23, 42, 0.2), 0 0 24px rgba(34, 197, 94, 0.2) !important;
}

.diagram-image-wrapper:focus-visible {
  outline: 3px solid var(--clr-accent-600);
  outline-offset: 4px;
}

.diagram-cards-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  max-width: 1200px;
  margin: 0 auto;
}

.diagram-card {
  background-color: var(--clr-bg-main);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-md);
  padding: 24px 20px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
}

.diagram-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--clr-accent-600);
}

.diagram-card-step {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 800;
  color: var(--clr-accent-600);
  background: var(--clr-accent-50);
  padding: 2px 10px;
  border-radius: 12px;
  margin-bottom: 12px;
}

.diagram-card-title {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--clr-primary-900);
  margin-bottom: 8px;
}

.diagram-card-desc {
  font-size: 0.925rem;
  color: var(--clr-text-muted);
  line-height: 1.5;
}

/* --------------------------------------------------------------------------
   10. Development Philosophy Section
   -------------------------------------------------------------------------- */
.philosophy-box {
  background: var(--clr-primary-900);
  color: var(--clr-text-inverse);
  border-radius: var(--radius-lg);
  padding: 64px 48px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.philosophy-box::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, #22c55e, #16a34a);
}

.philosophy-quote {
  font-size: 2rem;
  font-weight: 800;
  line-height: 1.4;
  max-width: 900px;
  margin: 0 auto 24px auto;
  color: #ffffff;
}

.philosophy-desc {
  font-size: 1.125rem;
  color: #94a3b8;
  max-width: 760px;
  margin: 0 auto;
  line-height: 1.7;
}

/* --------------------------------------------------------------------------
   11. Contact Section
   -------------------------------------------------------------------------- */
.contact-card {
  background-color: var(--clr-bg-main);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  padding: 48px;
  box-shadow: var(--shadow-lg);
  max-width: 800px;
  margin: 0 auto;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  margin-bottom: 40px;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
}

.contact-icon-box {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background-color: var(--clr-accent-50);
  color: var(--clr-accent-600);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-icon-box svg {
  width: 24px;
  height: 24px;
}

.contact-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--clr-text-muted);
  text-transform: uppercase;
  margin-bottom: 4px;
}

.contact-value {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--clr-primary-900);
}

.contact-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  padding-top: 32px;
  border-top: 1px solid var(--clr-border);
}

/* --------------------------------------------------------------------------
   12. Footer
   -------------------------------------------------------------------------- */
.site-footer {
  background-color: var(--clr-primary-900);
  color: var(--clr-text-light);
  padding: 48px 0 32px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 0.9rem;
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  text-align: center;
}

.footer-logo {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--clr-text-inverse);
}

.footer-links {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  justify-content: center;
}

.footer-link {
  color: #94a3b8;
  font-weight: 500;
  transition: color var(--transition-fast);
}

.footer-link:hover, .footer-link:focus {
  color: var(--clr-accent-500);
}

.footer-link-disabled {
  color: #64748b;
  cursor: not-allowed;
  opacity: 0.7;
}

.footer-link-disabled:hover {
  color: #64748b;
}

.footer-copy {
  color: #64748b;
  font-size: 0.85rem;
}

/* --------------------------------------------------------------------------
   14. Modal Dialog & Screenshot Gallery (UpClock Showcase)
   -------------------------------------------------------------------------- */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(15, 23, 42, 0.75);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-normal), visibility var(--transition-normal);
}

.modal-backdrop.open {
  opacity: 1;
  visibility: visible;
}

.modal-container {
  background-color: var(--clr-bg-main);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 900px;
  max-height: 90vh;
  overflow-y: auto;
  position: relative;
  transform: scale(0.95);
  transition: transform var(--transition-normal);
}

.modal-backdrop.open .modal-container {
  transform: scale(1);
}

.modal-header {
  position: sticky;
  top: 0;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  padding: 20px 28px;
  border-bottom: 1px solid var(--clr-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  z-index: 10;
}

.modal-title {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--clr-primary-900);
}

.modal-close-btn {
  background: none;
  border: none;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--clr-text-muted);
  cursor: pointer;
  padding: 4px 12px;
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.modal-close-btn:hover {
  background-color: var(--clr-bg-alt);
  color: var(--clr-primary-900);
}

.modal-body {
  padding: 32px 28px;
}

.upclock-hero-banner {
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: 28px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--clr-border);
}

.upclock-hero-banner img {
  width: 100%;
  height: auto;
  display: block;
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin: 24px 0 32px 0;
}

.gallery-item {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--clr-border);
  background-color: #000;
  box-shadow: var(--shadow-sm);
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-normal);
}

.gallery-item:hover img {
  transform: scale(1.04);
}

.gallery-caption {
  font-size: 0.85rem;
  font-weight: 600;
  text-align: center;
  padding: 8px 12px;
  background-color: var(--clr-primary-900);
  color: #ffffff;
}

.feature-pill-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 24px;
}

.feature-pill {
  background-color: var(--clr-accent-50);
  color: var(--clr-accent-700);
  border: 1px solid var(--clr-accent-100);
  padding: 8px 16px;
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 600;
}

.upclock-section-heading {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--clr-primary-900);
  margin-top: 24px;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.upclock-text-block {
  font-size: 0.95rem;
  color: var(--clr-text-muted);
  line-height: 1.7;
  margin-bottom: 16px;
}

.attribution-footer {
  background-color: var(--clr-bg-alt);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  margin-top: 24px;
  font-size: 0.85rem;
  color: var(--clr-text-muted);
}

@media (max-width: 768px) {
  .gallery-grid {
    grid-template-columns: 1fr;
  }
  .modal-container {
    max-height: 95vh;
  }
}

/* --------------------------------------------------------------------------
   13. Responsive Breakpoints
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 45% 55%;
    gap: 24px;
  }

  .hero-image-wrapper {
    max-width: 95%;
    margin: 0 auto;
  }

  .capabilities-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .products-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .farmblock-features-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .testbeds-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .diagram-cards-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 32px;
    text-align: center;
  }

  .hero-content {
    max-width: 100%;
    margin: 0 auto;
  }

  .hero-buttons {
    justify-content: center;
  }

  .hero-image-wrapper {
    max-width: 100%;
  }

  .nav-desktop {
    display: none;
  }

  .mobile-nav-toggle {
    display: block;
  }

  .section {
    padding: 64px 0;
  }

  .hero-title {
    font-size: 2.25rem;
  }

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

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

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

  .farmblock-features-grid {
    grid-template-columns: 1fr;
  }

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

  .diagram-cards-grid {
    grid-template-columns: 1fr;
  }

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

  .philosophy-box {
    padding: 40px 24px;
  }

  .philosophy-quote {
    font-size: 1.5rem;
  }

  .contact-card {
    padding: 32px 20px;
  }

  .contact-actions {
    flex-direction: column;
    width: 100%;
  }

  .contact-actions .btn {
    width: 100%;
  }
}