/* ========================================
   Renda Group Official Website
   Core CSS System & Responsive Layout
   ======================================== */

/* ========================================
   1. CSS Variables System
   ======================================== */

:root {
  /* Primary Colors */
  --color-primary: #00509D;
  --color-secondary: #00C897;
  --color-accent: #FF6B35;
  
  /* Text Colors */
  --color-text-dark: #333333;
  --color-text-light: #FFFFFF;
  --color-text-gray: #666666;
  
  /* Background Colors */
  --color-background-light: #F8F8F8;
  --color-background-white: #FFFFFF;
  --color-background-dark: #1a1a1a;
  
  /* Border & Divider */
  --color-border: #E0E0E0;
  --color-border-light: #F0F0F0;
  
  /* Spacing System (based on 16px = 1rem) */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-base: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 3.5rem;
  --spacing-3xl: 4.5rem;
  
  /* Typography */
  --font-family-base: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Microsoft YaHei', 'PingFang SC', sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 2rem;
  --font-size-4xl: 2.5rem;
  
  --font-weight-light: 300;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  
  /* Border Radius */
  --border-radius-sm: 3px;
  --border-radius-base: 5px;
  --border-radius-md: 8px;
  --border-radius-lg: 12px;
  
  /* Box Shadow */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
  --shadow-base: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.12);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.15);
  
  /* Transitions */
  --transition-fast: 0.15s ease-in-out;
  --transition-base: 0.3s ease-in-out;
  --transition-slow: 0.5s ease-in-out;
  
  /* Z-index */
  --z-dropdown: 100;
  --z-sticky: 50;
  --z-modal: 1000;
}

/* ========================================
   2. Reset & Base Styles
   ======================================== */

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-text-dark);
  background-color: var(--color-background-white);
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-base);
}

a:hover {
  color: var(--color-secondary);
}

button {
  font-family: var(--font-family-base);
  cursor: pointer;
  border: none;
  background: none;
}

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

/* ========================================
   3. Typography
   ======================================== */

h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-weight-bold);
  line-height: 1.3;
  margin-bottom: var(--spacing-md);
  color: var(--color-text-dark);
}

h1 {
  font-size: var(--font-size-4xl);
}

h2 {
  font-size: var(--font-size-3xl);
}

h3 {
  font-size: var(--font-size-2xl);
}

h4 {
  font-size: var(--font-size-xl);
}

h5 {
  font-size: var(--font-size-lg);
}

h6 {
  font-size: var(--font-size-base);
}

p {
  margin-bottom: var(--spacing-base);
  color: var(--color-text-gray);
}

/* ========================================
   4. Navigation Bar (Fixed Top)
   ======================================== */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 70px;
  background-color: var(--color-background-white);
  border-bottom: 1px solid var(--color-border-light);
  box-shadow: var(--shadow-sm);
  z-index: var(--z-dropdown);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--spacing-lg);
  gap: var(--spacing-lg);
}

.navbar-logo {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  line-height: 1.1;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.navbar-menu {
  display: flex;
  list-style: none;
  gap: 0;
  align-items: center;
  flex-wrap: nowrap;
  white-space: nowrap;
}

.navbar-item {
  position: relative;
  height: 70px;
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.navbar-link {
  padding: 0 var(--spacing-lg);
  height: 70px;
  display: flex;
  align-items: center;
  color: var(--color-text-dark);
  font-weight: var(--font-weight-medium);
  transition: color var(--transition-base);
  border-bottom: 3px solid transparent;
}

.navbar-link:hover {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

/* Dropdown Menu */
.dropdown {
  position: relative;
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  background-color: var(--color-background-white);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-md);
  min-width: 200px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all var(--transition-base);
  list-style: none;
  margin-top: 0;
}

.dropdown:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-item {
  padding: var(--spacing-md) var(--spacing-lg);
  color: var(--color-text-dark);
  display: block;
  transition: all var(--transition-base);
  border-left: 3px solid transparent;
}

.dropdown-item:hover {
  background-color: var(--color-background-light);
  color: var(--color-primary);
  border-left-color: var(--color-primary);
  padding-left: calc(var(--spacing-lg) + 3px);
}

/* Mobile Menu Toggle */
.navbar-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
}

.navbar-toggle span {
  width: 25px;
  height: 3px;
  background-color: var(--color-text-dark);
  border-radius: var(--border-radius-sm);
  transition: all var(--transition-base);
}

/* ========================================
   5. Main Content Area
   ======================================== */

main {
  margin-top: 70px;
  min-height: calc(100vh - 70px);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

/* ========================================
   6. Grid Layout System
   ======================================== */

.grid {
  display: grid;
  gap: var(--spacing-lg);
}

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

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

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

.grid-auto {
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

/* ========================================
   7. Flexbox Utilities
   ======================================== */

.flex {
  display: flex;
}

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

.flex-between {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.flex-column {
  display: flex;
  flex-direction: column;
}

.gap-sm {
  gap: var(--spacing-sm);
}

.gap-base {
  gap: var(--spacing-base);
}

.gap-md {
  gap: var(--spacing-md);
}

.gap-lg {
  gap: var(--spacing-lg);
}

/* ========================================
   8. Buttons
   ======================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--border-radius-base);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  transition: all var(--transition-base);
  cursor: pointer;
  border: 2px solid transparent;
}

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

.btn-primary:hover {
  background-color: #003D7A;
  box-shadow: var(--shadow-md);
}

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

.btn-secondary:hover {
  background-color: #00A876;
  box-shadow: var(--shadow-md);
}

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

.btn-outline:hover {
  background-color: var(--color-primary);
  color: var(--color-text-light);
}

.btn-lg {
  padding: var(--spacing-md) var(--spacing-2xl);
  font-size: var(--font-size-lg);
}

.btn-sm {
  padding: var(--spacing-xs) var(--spacing-md);
  font-size: var(--font-size-sm);
}

/* ========================================
   9. Cards
   ======================================== */

.card {
  background-color: var(--color-background-white);
  border: 1px solid var(--color-border-light);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  transition: all var(--transition-base);
  box-shadow: var(--shadow-sm);
}

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

.card-image {
  width: 100%;
  height: 250px;
  object-fit: cover;
  overflow: hidden;
}

.card-body {
  padding: var(--spacing-lg);
}

.card-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--spacing-base);
  color: var(--color-text-dark);
}

.card-text {
  font-size: var(--font-size-sm);
  color: var(--color-text-gray);
  margin-bottom: var(--spacing-base);
}

.card-footer {
  padding: 0 var(--spacing-lg) var(--spacing-lg);
  border-top: 1px solid var(--color-border-light);
  padding-top: var(--spacing-base);
}

/* ========================================
   10. Sections
   ======================================== */

.section {
  padding: var(--spacing-2xl) 0;
}

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

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

.section-title {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
}

.section-title h2 {
  font-size: var(--font-size-3xl);
  margin-bottom: var(--spacing-md);
}

.section-title p {
  font-size: var(--font-size-lg);
  color: var(--color-text-gray);
}

/* ========================================
   11. Footer
   ======================================== */

footer {
  background-color: var(--color-primary);
  color: var(--color-text-light);
  padding: var(--spacing-2xl) 0 var(--spacing-lg);
  margin-top: var(--spacing-2xl);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-2xl);
}

.footer-section h4 {
  color: var(--color-text-light);
  margin-bottom: var(--spacing-md);
}

.footer-section ul {
  list-style: none;
}

.footer-section li {
  margin-bottom: var(--spacing-sm);
}

.footer-section a {
  color: var(--color-text-light);
  opacity: 0.8;
  transition: opacity var(--transition-base);
}

.footer-section a:hover {
  opacity: 1;
  color: var(--color-secondary);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.2);
  padding-top: var(--spacing-lg);
  text-align: center;
  font-size: var(--font-size-sm);
  opacity: 0.8;
}

/* ========================================
   12. Responsive Design
   ======================================== */

/* Tablet (768px and below) */
@media (max-width: 768px) {
  .navbar {
    padding: 0 var(--spacing-md);
  }

  .navbar-logo {
    font-size: var(--font-size-lg);
    line-height: 1.2;
    white-space: normal;
  }

  .navbar-menu {
    display: none;
    position: absolute;
    top: 70px;
    left: 0;
    right: 0;
    flex-direction: column;
    background-color: var(--color-background-white);
    border-bottom: 1px solid var(--color-border);
    gap: 0;
    white-space: normal;
  }

  .navbar-menu.active {
    display: flex;
  }

  .navbar-item {
    width: 100%;
    height: auto;
  }

  .navbar-link {
    width: 100%;
    height: auto;
    padding: var(--spacing-md) var(--spacing-lg);
    border-bottom: none;
    border-left: 3px solid transparent;
    white-space: normal;
  }

  .navbar-link:hover {
    border-bottom: none;
    border-left-color: var(--color-primary);
    background-color: var(--color-background-light);
  }

  .navbar-toggle {
    display: flex;
  }

  .dropdown-menu {
    position: static;
    opacity: 0;
    visibility: hidden;
    transform: none;
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-base);
  }

  .dropdown.active .dropdown-menu {
    opacity: 1;
    visibility: visible;
    max-height: 500px;
    border: none;
    box-shadow: none;
    background-color: var(--color-background-light);
  }

  .dropdown-item {
    padding-left: var(--spacing-2xl);
  }

  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }

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

  h1 {
    font-size: var(--font-size-3xl);
  }

  h2 {
    font-size: var(--font-size-2xl);
  }

  .section {
    padding: var(--spacing-xl) 0;
  }
}

/* Mobile (480px and below) */
@media (max-width: 480px) {
  :root {
    font-size: 14px;
  }

  .navbar {
    padding: 0 var(--spacing-md);
  }

  .navbar-logo {
    font-size: var(--font-size-base);
    letter-spacing: 0.02em;
  }

  .container {
    padding: 0 var(--spacing-md);
  }

  .footer-content {
    grid-template-columns: 1fr;
  }

  h1 {
    font-size: var(--font-size-2xl);
  }

  h2 {
    font-size: var(--font-size-xl);
  }

  .section {
    padding: var(--spacing-lg) 0;
  }

  .btn-lg {
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: var(--font-size-base);
  }
}

/* ========================================
   13. Utility Classes
   ======================================== */

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

.text-left {
  text-align: left;
}

.text-right {
  text-align: right;
}

.text-primary {
  color: var(--color-primary);
}

.text-secondary {
  color: var(--color-secondary);
}

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

.text-gray {
  color: var(--color-text-gray);
}

.bg-primary {
  background-color: var(--color-primary);
}

.bg-secondary {
  background-color: var(--color-secondary);
}

.bg-light {
  background-color: var(--color-background-light);
}

.mt-sm { margin-top: var(--spacing-sm); }
.mt-base { margin-top: var(--spacing-base); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }

.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-base { margin-bottom: var(--spacing-base); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }

.p-sm { padding: var(--spacing-sm); }
.p-base { padding: var(--spacing-base); }
.p-md { padding: var(--spacing-md); }
.p-lg { padding: var(--spacing-lg); }

.rounded { border-radius: var(--border-radius-base); }
.rounded-md { border-radius: var(--border-radius-md); }
.rounded-lg { border-radius: var(--border-radius-lg); }

.shadow { box-shadow: var(--shadow-base); }
.shadow-md { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }

.hidden { display: none; }
.visible { display: block; }

.opacity-50 { opacity: 0.5; }
.opacity-75 { opacity: 0.75; }

/* ========================================
   14. Animation
   ======================================== */

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  animation: fadeIn var(--transition-base);
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.slide-in-left {
  animation: slideInLeft var(--transition-base);
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.slide-in-right {
  animation: slideInRight var(--transition-base);
}

/* ========================================
   15. Hero & Science Visuals
   ======================================== */

.hero {
  position: relative;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--spacing-xl);
  align-items: center;
  padding: var(--spacing-2xl) 0;
}

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

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.12);
  color: var(--color-text-light);
  font-size: var(--font-size-sm);
  letter-spacing: 1px;
  text-transform: uppercase;
}

.hero-dark .hero-eyebrow {
  background: rgba(255, 255, 255, 0.16);
}

.hero-title {
  font-size: clamp(2.3rem, 3.2vw, 3rem);
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
}

.hero-subtitle {
  font-size: var(--font-size-base);
  color: inherit;
  opacity: 0.88;
  margin-bottom: var(--spacing-lg);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.hero-visual {
  position: relative;
  min-height: 280px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-content {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  max-width: 480px;
}

.dna-helix {
  position: relative;
  width: 220px;
  height: 340px;
  filter: drop-shadow(0 10px 25px rgba(0, 0, 0, 0.25));
}

.dna-helix span {
  --offset: calc(var(--i) * 26px);
  position: absolute;
  top: var(--offset);
  left: 50%;
  transform: translateX(-50%);
  width: 140px;
  height: 2px;
  background: linear-gradient(90deg, rgba(0, 200, 151, 0.1), rgba(0, 200, 151, 0.7), rgba(0, 80, 157, 0.1));
  border-radius: 50%;
  animation: helixWave 6s linear infinite;
  animation-delay: calc(var(--i) * -0.25s);
}

.dna-helix span::before,
.dna-helix span::after {
  content: '';
  position: absolute;
  top: -6px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-secondary), rgba(0, 80, 157, 0.8));
  box-shadow: 0 0 15px rgba(0, 200, 151, 0.6);
}

.dna-helix span::before {
  left: -6px;
  animation: helixSpin 6s linear infinite;
  animation-delay: calc(var(--i) * -0.25s);
}

.dna-helix span::after {
  right: -6px;
  animation: helixSpin 6s linear infinite reverse;
  animation-delay: calc(var(--i) * -0.25s);
}

.hero-orbit {
  position: absolute;
  inset: 10% 5%;
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 40% 60% 65% 35% / 45% 55% 45% 55%;
  animation: orbitPulse 12s ease-in-out infinite;
}

.hero-visual::after {
  content: '';
  position: absolute;
  inset: 15%;
  background: radial-gradient(circle at center, rgba(0, 200, 151, 0.25), rgba(0, 80, 157, 0.05));
  filter: blur(30px);
  z-index: -1;
}

@keyframes helixWave {
  0% {
    transform: translateX(-50%) rotateY(0deg);
    opacity: 0.7;
  }
  50% {
    transform: translateX(-50%) rotateY(180deg);
    opacity: 1;
  }
  100% {
    transform: translateX(-50%) rotateY(360deg);
    opacity: 0.7;
  }
}

@keyframes helixSpin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

@keyframes orbitPulse {
  0%, 100% {
    transform: rotate(0deg) scale(1);
    opacity: 0.6;
  }
  50% {
    transform: rotate(12deg) scale(1.05);
    opacity: 1;
  }
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--spacing-lg);
}

.stat-card {
  background: rgba(255, 255, 255, 0.15);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-xl);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: inherit;
  text-align: left;
}

.stat-card strong {
  font-size: var(--font-size-3xl);
  display: block;
  margin-bottom: var(--spacing-sm);
}

.stat-card span {
  font-size: var(--font-size-sm);
  letter-spacing: 1px;
  text-transform: uppercase;
  opacity: 0.85;
}

/* ========================================
   16. Content Modules & Layouts
   ======================================== */

.section-subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-gray);
  max-width: 720px;
  margin: 0 auto var(--spacing-2xl);
  text-align: center;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--spacing-lg);
}

.feature-card {
  background: var(--color-background-white);
  border-radius: var(--border-radius-lg);
  border: 1px solid var(--color-border-light);
  padding: var(--spacing-xl);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-base);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.feature-card ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--spacing-xs);
}

.feature-card li {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--font-size-sm);
  color: var(--color-text-gray);
}

.feature-card li::before {
  content: '';
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--color-secondary);
  box-shadow: 0 0 0 4px rgba(0, 200, 151, 0.15);
}

.feature-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--spacing-xs);
}

.feature-list li {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--font-size-sm);
  color: var(--color-text-gray);
}

.feature-list li::before {
  content: '';
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--color-secondary);
  box-shadow: 0 0 0 4px rgba(0, 200, 151, 0.15);
}

.feature-card h3 {
  margin-bottom: 0;
}

.feature-card p {
  margin-bottom: 0;
  flex: 1;
  color: var(--color-text-gray);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: 999px;
  background-color: rgba(0, 80, 157, 0.1);
  color: var(--color-primary);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  letter-spacing: 0.5px;
}

.data-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--spacing-lg);
}

.data-card {
  background-color: var(--color-background-white);
  border: 1px solid var(--color-border-light);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-base);
}

.data-card strong {
  font-size: var(--font-size-2xl);
  color: var(--color-primary);
}

.data-card span {
  font-size: var(--font-size-sm);
  color: var(--color-text-gray);
}

.timeline {
  position: relative;
  display: grid;
  gap: var(--spacing-lg);
  padding-left: var(--spacing-3xl);
}

.timeline::before {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: 12px;
  width: 2px;
  background: linear-gradient(to bottom, rgba(0, 80, 157, 0.1), rgba(0, 80, 157, 0.8));
}

.timeline-item {
  position: relative;
  background: var(--color-background-white);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-lg) var(--spacing-xl);
  border: 1px solid var(--color-border-light);
  box-shadow: var(--shadow-sm);
}

.timeline-item::before {
  content: '';
  position: absolute;
  top: var(--spacing-lg);
  left: -var(--spacing-xl);
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--color-primary);
  box-shadow: 0 0 0 4px rgba(0, 80, 157, 0.15);
}

.timeline-year {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-secondary);
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: var(--spacing-sm);
  display: inline-block;
}

.tab-container {
  border: 1px solid var(--color-border-light);
  border-radius: var(--border-radius-lg);
  background-color: var(--color-background-white);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.tab-nav {
  display: flex;
  flex-wrap: wrap;
  border-bottom: 1px solid var(--color-border-light);
  background-color: var(--color-background-light);
}

.tab-button {
  flex: 1;
  min-width: 200px;
  padding: var(--spacing-md) var(--spacing-lg);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  text-align: center;
  color: var(--color-text-gray);
  cursor: pointer;
  transition: background var(--transition-base), color var(--transition-base);
  border-bottom: 2px solid transparent;
}

.tab-button.active {
  color: var(--color-primary);
  background-color: var(--color-background-white);
  border-bottom-color: var(--color-primary);
}

.tab-panel {
  display: none;
  padding: var(--spacing-xl);
}

.tab-panel.active {
  display: block;
}

.media-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
}

.media-card {
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border-light);
  background-color: var(--color-background-white);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
}

.media-card img {
  height: 190px;
  object-fit: cover;
}

.media-card .media-body {
  padding: var(--spacing-lg);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  flex: 1;
}

.media-meta {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  font-size: var(--font-size-xs);
  color: var(--color-text-gray);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.media-meta span {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.quote-card {
  border-left: 4px solid var(--color-primary);
  padding: var(--spacing-xl);
  background: linear-gradient(135deg, rgba(0, 80, 157, 0.08), rgba(0, 200, 151, 0.08));
  border-radius: var(--border-radius-lg);
  font-size: var(--font-size-lg);
  color: var(--color-text-dark);
}

/* ========================================
   17. Forms, Tables & Contact
   ======================================== */

.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--spacing-lg);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.form-group label {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-dark);
}

input[type=\"text\"],
input[type=\"email\"],
input[type=\"tel\"],
input[type=\"number\"],
select,
textarea {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--border-radius-base);
  border: 1px solid var(--color-border);
  font-size: var(--font-size-base);
  transition: border var(--transition-base), box-shadow var(--transition-base);
  background-color: var(--color-background-white);
}

textarea {
  min-height: 140px;
  resize: vertical;
}

input:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(0, 80, 157, 0.12);
}

.form-actions {
  margin-top: var(--spacing-lg);
  display: flex;
  justify-content: flex-end;
}

.table-responsive {
  width: 100%;
  overflow-x: auto;
  border-radius: var(--border-radius-lg);
  border: 1px solid var(--color-border-light);
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 640px;
}

th, td {
  padding: var(--spacing-md);
  text-align: left;
  border-bottom: 1px solid var(--color-border-light);
  font-size: var(--font-size-sm);
}

thead {
  background-color: var(--color-background-light);
}

tbody tr:hover {
  background-color: rgba(0, 80, 157, 0.05);
}

.contact-wrapper {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-2xl);
}

.contact-card {
  border: 1px solid var(--color-border-light);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-xl);
  background-color: var(--color-background-white);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  height: 100%;
}

.contact-card h3 {
  margin-bottom: 0;
}

.contact-details {
  display: grid;
  gap: var(--spacing-sm);
  font-size: var(--font-size-sm);
  color: var(--color-text-gray);
}

.map-embed {
  width: 100%;
  border-radius: var(--border-radius-lg);
  border: 1px solid var(--color-border-light);
  overflow: hidden;
  height: 320px;
}

.partner-logos {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--spacing-lg);
  align-items: center;
}

.partner-logo {
  border-radius: var(--border-radius-lg);
  border: 1px solid var(--color-border-light);
  padding: var(--spacing-lg);
  background-color: var(--color-background-white);
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 120px;
}

.org-chart {
  display: grid;
  gap: var(--spacing-lg);
}

.org-level {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--spacing-lg);
}

.org-card {
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-lg);
  background: linear-gradient(135deg, rgba(0, 80, 157, 0.08), rgba(0, 200, 151, 0.08));
  border: 1px solid rgba(0, 80, 157, 0.15);
  box-shadow: var(--shadow-sm);
}

.org-card h4 {
  margin-bottom: var(--spacing-sm);
}

.org-card ul {
  list-style: none;
  display: grid;
  gap: var(--spacing-xs);
  font-size: var(--font-size-sm);
  color: var(--color-text-gray);
}

/* ========================================
   18. Responsive Tweaks
   ======================================== */

@media (max-width: 992px) {
  .hero {
    grid-template-columns: 1fr;
    text-align: center;
  }

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

  .hero-visual {
    order: -1;
  }

  .timeline {
    padding-left: var(--spacing-2xl);
  }

  .timeline-item::before {
    left: -var(--spacing-lg);
  }
}

@media (max-width: 768px) {
  .feature-card,
  .data-card,
  .timeline-item {
    padding: var(--spacing-lg);
  }

  .tab-button {
    min-width: 140px;
  }

  table {
    min-width: auto;
  }
}

@media (max-width: 576px) {
  .hero {
    padding: var(--spacing-2xl) 0;
  }

  .hero-title {
    font-size: clamp(2rem, 6vw, 2.75rem);
  }

  .hero-subtitle {
    font-size: var(--font-size-base);
  }

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