:root {
  /* Light theme */
  --bg-primary: #ffffff;
  --bg-secondary: #f8f9fa;
  --text-primary: #202124;
  --text-secondary: #5f6368;
  --accent-color: #1a73e8;
  --button-color: #1a73e8;
  --button-hover: #1557b0;
  --surface-color: #ffffff;
  --border-color: #dadce0;
  --banner-bg: #e8f0fe;
  --shadow-color: rgba(60, 64, 67, 0.3);
  --card-hover: #f1f3f4;
}

[data-theme="dark"] {
  /* Dark theme */
  --bg-primary: #202124;
  --bg-secondary: #292a2d;
  --text-primary: #e8eaed;
  --text-secondary: #9aa0a6;
  --accent-color: #8ab4f8;
  --button-color: #8ab4f8;
  --button-hover: #93b8f7;
  --surface-color: #292a2d;
  --border-color: #5f6368;
  --banner-bg: #303134;
  --shadow-color: rgba(0, 0, 0, 0.3);
  --card-hover: #303134;
}

body {
  font-family: 'Google Sans', 'Roboto', sans-serif;
  line-height: 1.6;
  margin: 0;
  padding: 0;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  transition: background-color 0.3s ease;
}

.container {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

header {
  background-color: var(--surface-color);
  padding: 12px 0;
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 1000;
  backdrop-filter: blur(8px);
}

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

.logo {
  font-family: 'Google Sans', sans-serif;
  font-weight: 500;
  font-size: 22px;
  color: var(--text-primary);
  text-decoration: none;
}

.theme-toggle {
  background: transparent;
  border: none;
  padding: 8px;
  border-radius: 50%;
  cursor: pointer;
  color: var(--text-primary);
  transition: background-color 0.2s ease;
}

.theme-toggle:hover {
  background-color: var(--card-hover);
}

.banner {
  background-color: var(--banner-bg);
  padding: 48px 24px;
  margin: 24px 0;
  border-radius: 8px;
}

.banner h1 {
  font-size: 32px;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.banner p {
  color: var(--text-secondary);
  margin-bottom: 24px;
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
  margin: 48px 0;
}

.service-item {
  background-color: var(--surface-color);
  padding: 24px;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  transition: all 0.2s ease;
}

.service-item:hover {
  box-shadow: 0 1px 2px 0 var(--shadow-color);
  background-color: var(--card-hover);
}

button {
  background-color: var(--button-color);
  color: #ffffff;
  border: none;
  padding: 8px 24px;
  border-radius: 4px;
  font-family: 'Google Sans', sans-serif;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
}

button:hover {
  background-color: var(--button-hover);
  box-shadow: 0 1px 2px 0 var(--shadow-color);
}

/* Material ripple effect for buttons */
button {
  position: relative;
  overflow: hidden;
}

button::after {
  content: '';
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  pointer-events: none;
  background-image: radial-gradient(circle, #fff 10%, transparent 10.01%);
  background-repeat: no-repeat;
  background-position: 50%;
  transform: scale(10, 10);
  opacity: 0;
  transition: transform .5s, opacity 1s;
}

button:active::after {
  transform: scale(0, 0);
  opacity: 0.3;
  transition: 0s;
}

/* List styling */
ul {
  list-style: none;
  padding: 0;
}

ul li {
  margin-bottom: 12px;
  padding-left: 24px;
  position: relative;
  color: var(--text-secondary);
}

ul li::before {
  content: '•';
  color: var(--accent-color);
  position: absolute;
  left: 0;
}

@media (max-width: 768px) {
  .banner {
    padding: 32px 16px;
  }
  
  .service-grid {
    grid-template-columns: 1fr;
  }
}

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 64px;
}

.left-nav {
    display: flex;
    align-items: center;
    gap: 40px;
}

.nav-links {
    display: flex;
    gap: 32px;
}

.nav-links a {
    color: var(--text-primary);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: color 0.2s ease;
}

.nav-links a:hover {
    color: var(--accent-color);
}

.right-nav {
    display: flex;
    align-items: center;
    gap: 16px;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--text-primary);
}

.mobile-menu {
    display: none;
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background-color: var(--bg-primary);
    padding: 16px;
    border-top: 1px solid var(--border-color);
    box-shadow: 0 4px 6px -1px var(--shadow-color);
}

.mobile-menu-links {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.mobile-menu-links a {
    color: var(--text-primary);
    text-decoration: none;
    font-size: 16px;
    padding: 8px 16px;
    border-radius: 4px;
}

.mobile-menu-links a:hover {
    background-color: var(--card-hover);
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .menu-toggle {
        display: block;
    }

    .mobile-menu.active {
        display: block;
    }
}

.page-header {
    padding: 80px 0;
    text-align: center;
}

.page-header h1 {
    font-size: 48px;
    margin-bottom: 16px;
    font-weight: 700;
}

.page-header p {
    font-size: 20px;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.content-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
    padding: 40px 0;
}

.content-card {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 24px;
    transition: transform 0.2s ease;
}

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

.content-card h2 {
    margin-bottom: 16px;
    font-size: 24px;
}

.content-card p {
    color: var(--text-secondary);
    margin-bottom: 24px;
}

/* Safety Page Specific Styles */
.safety-hero {
    background: var(--banner-bg);
    padding: 80px 0;
    text-align: center;
    margin-bottom: 60px;
}

.safety-hero h1 {
    font-size: 48px;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.safety-hero p {
    font-size: 20px;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 32px;
    margin: 60px 0;
}

.feature-card {
    padding: 32px;
    background: var(--surface-color);
    border-radius: 12px;
    text-align: center;
    border: 1px solid var(--border-color);
    transition: transform 0.2s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
}

.feature-card i {
    font-size: 32px;
    color: var(--accent-color);
    margin-bottom: 20px;
}

.resources-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
    margin: 40px 0;
}

.resource-card {
    padding: 32px;
    background: var(--surface-color);
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.resource-card ul {
    margin: 20px 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 32px;
    margin: 40px 0;
}

.stat-card {
    text-align: center;
    padding: 32px;
    background: var(--surface-color);
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.stat-card h3 {
    font-size: 36px;
    color: var(--accent-color);
    margin-bottom: 8px;
}

.cta-section {
    text-align: center;
    padding: 80px 0;
}

.cta-content {
    max-width: 600px;
    margin: 0 auto;
}

.cta-content h2 {
    margin-bottom: 20px;
}

.primary-button {
    background-color: var(--button-color);
    color: white;
    padding: 12px 24px;
    border-radius: 6px;
    border: none;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.2s ease;
    margin-top: 20px;
}

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

@media (max-width: 768px) {
    .safety-hero h1 {
        font-size: 36px;
    }

    .safety-hero {
        padding: 60px 0;
    }

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

/* Research Page Specific Styles */
.research-hero {
    background: var(--banner-bg);
    padding: 80px 0;
    text-align: center;
    margin-bottom: 60px;
}

.findings-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 32px;
    margin: 40px 0;
}

.finding-card {
    background: var(--surface-color);
    padding: 32px;
    border-radius: 12px;
    text-align: center;
    border: 1px solid var(--border-color);
    transition: transform 0.2s ease;
}

.finding-card:hover {
    transform: translateY(-5px);
}

.stat-highlight {
    font-size: 48px;
    font-weight: 700;
    color: var(--accent-color);
    margin-bottom: 16px;
}

.impact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
    margin: 40px 0;
}

.impact-card {
    background: var(--surface-color);
    padding: 32px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.impact-card h3 {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
}

.impact-card i {
    color: var(--accent-color);
}

.impact-stat {
    margin-top: 20px;
    padding: 16px;
    background: var(--bg-secondary);
    border-radius: 8px;
    text-align: center;
}

.timeline-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 32px;
    margin: 40px 0;
}

.timeline-card {
    background: var(--surface-color);
    padding: 32px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.solutions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 32px;
    margin: 40px 0;
}

.solution-card {
    text-align: center;
    padding: 32px;
    background: var(--surface-color);
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.solution-card i {
    font-size: 32px;
    color: var(--accent-color);
    margin-bottom: 16px;
}

.cta-research {
    text-align: center;
    padding: 80px 0;
}

.secondary-button {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    padding: 12px 24px;
    border-radius: 6px;
    border: 1px solid var(--border-color);
    font-weight: 500;
    cursor: pointer;
    margin-left: 16px;
    transition: background-color 0.2s ease;
}

.secondary-button:hover {
    background-color: var(--card-hover);
}

@media (max-width: 768px) {
    .research-hero h1 {
        font-size: 36px;
    }
    
    .secondary-button {
        margin: 16px 0 0 0;
    }
}

.stat-highlight i {
    font-size: 36px;
    color: var(--accent-color);
}

.finding-card .stat-highlight {
    display: flex;
    align-items: center;
    justify-content: center;
}

.reference-list cite a {
    color: var(--text-primary);
    text-decoration: none;
    transition: color 0.2s ease;
}

.reference-list cite a:hover {
    color: var(--accent-color);
}

.reference-list cite a::after {
    content: '↗';
    margin-left: 4px;
    font-size: 0.8em;
}

.coming-soon {
    text-align: center;
    padding: 48px;
    max-width: 600px;
    margin: 0 auto;
}

.coming-soon i {
    font-size: 48px;
    color: var(--accent-color);
    margin-bottom: 24px;
}

.coming-soon h2 {
    font-size: 32px;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.coming-soon p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 24px;
}

.coming-soon .contact-info {
    font-size: 18px;
    margin: 24px 0;
}

.coming-soon .contact-info a {
    color: var(--accent-color);
    text-decoration: none;
    font-weight: 500;
    transition: opacity 0.2s ease;
}

.coming-soon .contact-info a:hover {
    opacity: 0.8;
}

.coming-soon .primary-button {
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.coming-soon .primary-button i {
    font-size: 18px;
    margin: 0;
}

.team-grid {
    display: grid;
    gap: 2rem;
    padding: 2rem 0;
}

.team-member {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 2rem;
    border-radius: 8px;
    background: var(--card-bg);
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.member-image {
    margin-bottom: 1.5rem;
}

.member-info h2 {
    margin-bottom: 0.5rem;
}

.member-info h3 {
    color: var(--secondary-text);
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.social-links {
    margin-top: 1rem;
}

.social-links a {
    margin: 0 0.5rem;
    color: var(--primary-text);
    font-size: 1.2rem;
}

/* Dark mode support */
[data-theme="dark"] .team-member {
    background: var(--dark-card-bg);
}

[data-theme="dark"] .member-info h3 {
    color: var(--dark-secondary-text);
}

@media (min-width: 768px) {
    .team-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}