:root {
  --primary-color: #0077be;
  --secondary-color: #00a8e8;
  --accent-color: #4dd0e1;
  --text-dark: #1a1a1a;
  --text-light: #ffffff;
  --text-gray: #666666;
  --bg-light: #f8f9fa;
  --bg-white: #ffffff;
  --bg-dark: #2c3e50;
  --font-primary: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  --font-secondary: Georgia, 'Times New Roman', serif;
  --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
  --shadow-md: 0 4px 8px rgba(0,0,0,0.15);
  --shadow-lg: 0 8px 16px rgba(0,0,0,0.2);
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 3rem;
  --spacing-xl: 4rem;
  --transition: all 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
}

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

header {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: var(--text-light);
  padding: var(--spacing-sm) 0;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: var(--shadow-md);
}

.header-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-sm);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.brand {
  font-size: 1.5rem;
  font-weight: 700;
  text-decoration: none;
  color: var(--text-light);
  transition: var(--transition);
}

.brand:hover {
  opacity: 0.9;
  transform: scale(1.05);
}

nav ul {
  list-style: none;
  display: flex;
  gap: var(--spacing-md);
}

nav a {
  color: var(--text-light);
  text-decoration: none;
  font-weight: 500;
  transition: var(--transition);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
}

nav a:hover {
  background-color: rgba(255,255,255,0.2);
  transform: translateY(-2px);
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-light);
  font-size: 1.5rem;
  cursor: pointer;
}

main {
  min-height: 60vh;
}

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

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

.hero {
  background: linear-gradient(135deg, rgba(0,119,190,0.9), rgba(0,168,232,0.9)), url('../hydration-assets/hero-banner.jpg') center/cover;
  color: var(--text-light);
  text-align: center;
  padding: var(--spacing-xl) var(--spacing-sm);
  min-height: 500px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-content h1 {
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
  animation: fadeInUp 1s ease;
}

.hero-content p {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-md);
  animation: fadeInUp 1s ease 0.2s backwards;
}

.btn {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: var(--accent-color);
  color: var(--text-dark);
  text-decoration: none;
  border-radius: var(--radius-md);
  font-weight: 600;
  transition: var(--transition);
  border: none;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
}

.btn:hover {
  background-color: var(--secondary-color);
  color: var(--text-light);
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

.btn-secondary {
  background-color: transparent;
  border: 2px solid var(--text-light);
  color: var(--text-light);
}

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

.section-title {
  text-align: center;
  font-size: 2.5rem;
  margin-bottom: var(--spacing-md);
  color: var(--primary-color);
}

.section-subtitle {
  text-align: center;
  font-size: 1.125rem;
  color: var(--text-gray);
  margin-bottom: var(--spacing-lg);
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-md);
  margin-top: var(--spacing-md);
}

.card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

.card-icon {
  font-size: 3rem;
  color: var(--secondary-color);
  margin-bottom: var(--spacing-sm);
}

.card h3 {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-sm);
  color: var(--primary-color);
}

.card p {
  color: var(--text-gray);
  line-height: 1.8;
}

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

.bg-gradient {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: var(--text-light);
}

.feature-image {
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

.two-column {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-lg);
  align-items: center;
}

.content-box {
  padding: var(--spacing-md);
}

.content-box h3 {
  font-size: 2rem;
  margin-bottom: var(--spacing-sm);
  color: var(--primary-color);
}

.content-box ul {
  list-style: none;
  margin-top: var(--spacing-sm);
}

.content-box li {
  padding: var(--spacing-xs) 0;
  padding-left: var(--spacing-md);
  position: relative;
}

.content-box li::before {
  content: "💧";
  position: absolute;
  left: 0;
}

.stats {
  display: flex;
  justify-content: space-around;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  margin-top: var(--spacing-md);
}

.stat-item {
  text-align: center;
  padding: var(--spacing-md);
}

.stat-number {
  font-size: 3rem;
  font-weight: 700;
  color: var(--secondary-color);
  display: block;
}

.stat-label {
  font-size: 1rem;
  color: var(--text-gray);
  margin-top: var(--spacing-xs);
}

.form-group {
  margin-bottom: var(--spacing-md);
}

.form-group label {
  display: block;
  margin-bottom: var(--spacing-xs);
  font-weight: 600;
  color: var(--text-dark);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: var(--spacing-sm);
  border: 2px solid #e0e0e0;
  border-radius: var(--radius-md);
  font-family: var(--font-primary);
  font-size: 1rem;
  transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(0,119,190,0.1);
}

.form-group textarea {
  resize: vertical;
  min-height: 150px;
}

.form-group.error input,
.form-group.error textarea {
  border-color: #e74c3c;
}

.error-message {
  color: #e74c3c;
  font-size: 0.875rem;
  margin-top: var(--spacing-xs);
  display: none;
}

.form-group.error .error-message {
  display: block;
}

.checkbox-group {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-xs);
}

.checkbox-group input[type="checkbox"] {
  width: auto;
  margin-top: 4px;
}

.checkbox-group label {
  margin-bottom: 0;
  font-weight: 400;
}

.thank-you-container {
  text-align: center;
  padding: var(--spacing-xl) var(--spacing-sm);
  min-height: 60vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.thank-you-icon {
  font-size: 5rem;
  color: var(--secondary-color);
  margin-bottom: var(--spacing-md);
}

.thank-you-container h1 {
  font-size: 2.5rem;
  color: var(--primary-color);
  margin-bottom: var(--spacing-sm);
}

.thank-you-container p {
  font-size: 1.125rem;
  color: var(--text-gray);
  margin-bottom: var(--spacing-md);
  max-width: 600px;
}

.policy-content {
  max-width: 900px;
  margin: 0 auto;
  padding: var(--spacing-lg) var(--spacing-sm);
}

.policy-content h1 {
  font-size: 2.5rem;
  color: var(--primary-color);
  margin-bottom: var(--spacing-md);
}

.policy-content h2 {
  font-size: 1.75rem;
  color: var(--primary-color);
  margin-top: var(--spacing-lg);
  margin-bottom: var(--spacing-sm);
}

.policy-content h3 {
  font-size: 1.25rem;
  color: var(--text-dark);
  margin-top: var(--spacing-md);
  margin-bottom: var(--spacing-xs);
}

.policy-content p,
.policy-content li {
  color: var(--text-gray);
  line-height: 1.8;
  margin-bottom: var(--spacing-sm);
}

.policy-content ul {
  margin-left: var(--spacing-md);
  margin-bottom: var(--spacing-sm);
}

.disclaimer {
  background-color: #fff3cd;
  border-left: 4px solid #ffc107;
  padding: var(--spacing-md);
  margin: var(--spacing-md) 0;
  border-radius: var(--radius-sm);
}

.disclaimer p {
  color: var(--text-dark);
  margin-bottom: 0;
}

footer {
  background-color: var(--bg-dark);
  color: var(--text-light);
  padding: var(--spacing-lg) 0 var(--spacing-sm);
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-sm);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
}

.footer-section h3 {
  margin-bottom: var(--spacing-sm);
  color: var(--accent-color);
}

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

.footer-section a {
  color: var(--text-light);
  text-decoration: none;
  transition: var(--transition);
  display: block;
  padding: var(--spacing-xs) 0;
}

.footer-section a:hover {
  color: var(--accent-color);
  padding-left: var(--spacing-xs);
}

.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-md);
  border-top: 1px solid rgba(255,255,255,0.1);
  color: rgba(255,255,255,0.7);
}

.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: var(--bg-white);
  box-shadow: 0 -4px 12px rgba(0,0,0,0.15);
  padding: var(--spacing-md);
  z-index: 2000;
  display: none;
}

.cookie-banner.active {
  display: block;
}

.cookie-content {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

.cookie-text {
  flex: 1;
  min-width: 250px;
}

.cookie-buttons {
  display: flex;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

.cookie-settings {
  display: none;
  margin-top: var(--spacing-md);
  padding: var(--spacing-md);
  background-color: var(--bg-light);
  border-radius: var(--radius-md);
}

.cookie-settings.active {
  display: block;
}

.cookie-category {
  margin-bottom: var(--spacing-sm);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.cookie-category label {
  font-weight: 600;
}

.toggle-switch {
  position: relative;
  width: 50px;
  height: 24px;
}

.toggle-switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: #ccc;
  transition: var(--transition);
  border-radius: 24px;
}

.slider::before {
  position: absolute;
  content: "";
  height: 18px;
  width: 18px;
  left: 3px;
  bottom: 3px;
  background-color: white;
  transition: var(--transition);
  border-radius: 50%;
}

input:checked + .slider {
  background-color: var(--primary-color);
}

input:checked + .slider::before {
  transform: translateX(26px);
}

input:disabled + .slider {
  opacity: 0.5;
  cursor: not-allowed;
}

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

@media (max-width: 768px) {
  .menu-toggle {
    display: block;
  }

  nav ul {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    padding: var(--spacing-sm);
    gap: 0;
  }

  nav ul.active {
    display: flex;
  }

  nav li {
    width: 100%;
  }

  nav a {
    display: block;
    padding: var(--spacing-sm);
  }

  .hero-content h1 {
    font-size: 2rem;
  }

  .hero-content p {
    font-size: 1rem;
  }

  .section-title {
    font-size: 1.75rem;
  }

  .two-column {
    grid-template-columns: 1fr;
  }

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

  .cookie-content {
    flex-direction: column;
    align-items: stretch;
  }

  .cookie-buttons {
    flex-direction: column;
  }

  .stats {
    flex-direction: column;
  }
}

@media (max-width: 480px) {
  :root {
    --spacing-xl: 2rem;
    --spacing-lg: 1.5rem;
  }

  .hero-content h1 {
    font-size: 1.5rem;
  }

  .section-title {
    font-size: 1.5rem;
  }

  .brand {
    font-size: 1.125rem;
  }
}