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

:root {
  --color-bg: #f5f3f0;
  --color-text: #2a2a2a;
  --color-accent-primary: #1a3a4a;
  --color-accent-secondary: #d4c4a8;
  --color-white: #ffffff;
  --color-border: #d9d4ce;
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
}

html, body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', sans-serif;
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
}

h1, h2, h3, h4, h5, h6 {
  line-height: 1.3;
  margin-bottom: var(--spacing-md);
  font-weight: 600;
}

h1 {
  font-size: 2.5rem;
}

h2 {
  font-size: 2rem;
}

h3 {
  font-size: 1.5rem;
}

p {
  margin-bottom: var(--spacing-sm);
  font-size: 1rem;
  line-height: 1.6;
}

a {
  color: var(--color-accent-primary);
  text-decoration: none;
  transition: color 0.3s ease;
}

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

header {
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  padding: var(--spacing-md) var(--spacing-lg);
  position: sticky;
  top: 0;
  z-index: 100;
}

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

header .logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-accent-primary);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

header nav {
  display: flex;
  gap: var(--spacing-lg);
  align-items: center;
}

header nav a {
  color: var(--color-text);
  font-size: 0.95rem;
  transition: color 0.3s ease;
}

header nav a:hover {
  color: var(--color-accent-primary);
}

.btn {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-md);
  border: 2px solid var(--color-accent-primary);
  background-color: transparent;
  color: var(--color-accent-primary);
  text-decoration: none;
  border-radius: 4px;
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s ease;
  text-align: center;
}

.btn:hover {
  transform: scale(1.02);
  background-color: var(--color-accent-primary);
  color: var(--color-white);
}

.btn-primary {
  background-color: var(--color-accent-primary);
  color: var(--color-white);
  border-color: var(--color-accent-primary);
}

.btn-primary:hover {
  background-color: transparent;
  color: var(--color-accent-primary);
}

.hero {
  background: linear-gradient(rgba(26, 58, 74, 0.5), rgba(26, 58, 74, 0.5)), url(../images/hero-index.jpg) center/cover;
  background-attachment: fixed;
  color: var(--color-white);
  padding: 6rem var(--spacing-lg) 4rem;
  text-align: center;
  min-height: 400px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero h1 {
  color: var(--color-white);
  font-size: 2.5rem;
  margin-bottom: var(--spacing-md);
}

.hero p {
  color: rgba(255, 255, 255, 0.95);
  font-size: 1.1rem;
  margin-bottom: var(--spacing-lg);
}

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

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

.section-sand {
  background-color: var(--color-accent-secondary);
  background-color: rgba(212, 196, 168, 0.3);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
}

.row {
  display: flex;
  flex-wrap: wrap;
  margin: calc(var(--spacing-md) * -1);
}

.col {
  flex: 1;
  padding: var(--spacing-md);
  min-width: 280px;
}

.col-12 {
  flex: 0 0 100%;
  padding: var(--spacing-md);
}

.col-6 {
  flex: 0 0 50%;
  padding: var(--spacing-md);
}

.col-4 {
  flex: 0 0 33.333%;
  padding: var(--spacing-md);
}

.col-3 {
  flex: 0 0 25%;
  padding: var(--spacing-md);
}

.grid {
  display: grid;
  gap: var(--spacing-lg);
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
}

.card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  overflow: hidden;
  transition: all 0.3s ease;
}

.card:hover {
  box-shadow: 0 4px 12px rgba(26, 58, 74, 0.1);
  transform: translateY(-2px);
}

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

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

.card-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--color-accent-primary);
}

.card-text {
  font-size: 0.95rem;
  color: #666;
  margin-bottom: var(--spacing-md);
  line-height: 1.5;
}

.card-price {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-accent-primary);
  margin-bottom: var(--spacing-md);
}

.usage-blocks {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-lg);
  margin: var(--spacing-lg) 0;
}

.usage-block {
  background-color: var(--color-white);
  border: 2px solid var(--color-border);
  padding: var(--spacing-lg);
  text-align: center;
  border-radius: 8px;
  transition: all 0.3s ease;
}

.usage-block:hover {
  border-color: var(--color-accent-primary);
  background-color: rgba(26, 58, 74, 0.05);
}

.usage-block h3 {
  color: var(--color-accent-primary);
  margin-bottom: var(--spacing-sm);
}

.usage-block p {
  font-size: 0.95rem;
  color: #666;
  margin: 0;
}

.filter-buttons {
  display: flex;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
  margin: var(--spacing-lg) 0;
}

.filter-btn {
  padding: var(--spacing-sm) var(--spacing-md);
  border: 2px solid var(--color-border);
  background-color: var(--color-white);
  color: var(--color-text);
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.95rem;
  transition: all 0.3s ease;
}

.filter-btn:hover,
.filter-btn.active {
  border-color: var(--color-accent-primary);
  background-color: var(--color-accent-primary);
  color: var(--color-white);
}

.faq-item {
  background-color: var(--color-white);
  margin-bottom: var(--spacing-md);
  border-radius: 4px;
  overflow: hidden;
  border: 1px solid var(--color-border);
}

.faq-question {
  padding: var(--spacing-md);
  cursor: pointer;
  background-color: var(--color-white);
  border: none;
  width: 100%;
  text-align: left;
  font-weight: 600;
  color: var(--color-accent-primary);
  font-size: 1rem;
  transition: background-color 0.3s ease;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq-question:hover {
  background-color: rgba(26, 58, 74, 0.05);
}

.faq-answer {
  padding: 0 var(--spacing-md);
  color: #666;
  line-height: 1.6;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
}

.faq-item.active .faq-answer {
  padding: var(--spacing-md);
  max-height: 500px;
}

.faq-icon {
  font-size: 1.2rem;
}

footer {
  background-color: var(--color-accent-primary);
  color: var(--color-white);
  padding: var(--spacing-xl) var(--spacing-lg);
  margin-top: var(--spacing-xl);
}

footer a {
  color: var(--color-accent-secondary);
  text-decoration: none;
}

footer a:hover {
  text-decoration: underline;
}

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

.footer-section h4 {
  color: var(--color-white);
  font-size: 1rem;
  margin-bottom: var(--spacing-sm);
}

.footer-section p,
.footer-section a {
  font-size: 0.95rem;
  line-height: 1.8;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.2);
  padding-top: var(--spacing-md);
  text-align: center;
  font-size: 0.9rem;
}

.form-group {
  margin-bottom: var(--spacing-md);
  display: flex;
  flex-direction: column;
}

.form-group label {
  margin-bottom: var(--spacing-xs);
  font-weight: 500;
  color: var(--color-text);
}

.form-group input,
.form-group textarea {
  padding: var(--spacing-sm);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  font-family: inherit;
  font-size: 1rem;
  color: var(--color-text);
  background-color: var(--color-white);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-accent-primary);
  box-shadow: 0 0 0 3px rgba(26, 58, 74, 0.1);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.checkbox-group {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin: var(--spacing-md) 0;
}

.checkbox-group input[type="checkbox"] {
  width: 18px;
  height: 18px;
  cursor: pointer;
}

.checkbox-group label {
  margin: 0;
  font-size: 0.95rem;
  cursor: pointer;
}

.thank-you-message {
  text-align: center;
  padding: var(--spacing-xl);
  background-color: var(--color-white);
  border-radius: 8px;
  max-width: 500px;
  margin: var(--spacing-xl) auto;
}

.thank-you-message h2 {
  color: var(--color-accent-primary);
  margin-bottom: var(--spacing-md);
}

.thank-you-message p {
  margin-bottom: var(--spacing-lg);
  font-size: 1.05rem;
}

.breadcrumb {
  display: flex;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
  font-size: 0.95rem;
}

.breadcrumb a {
  color: var(--color-accent-primary);
}

.breadcrumb span {
  color: #999;
}

.cookie-consent {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: var(--color-white);
  border-top: 1px solid var(--color-border);
  padding: var(--spacing-md) var(--spacing-lg);
  z-index: 1000;
  display: none;
}

.cookie-consent.show {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-lg);
}

.cookie-consent p {
  margin: 0;
  font-size: 0.95rem;
  flex: 1;
}

.cookie-consent .btn {
  white-space: nowrap;
}

@media (max-width: 768px) {
  h1 {
    font-size: 1.8rem;
  }

  h2 {
    font-size: 1.4rem;
  }

  h3 {
    font-size: 1.2rem;
  }

  header {
    padding: var(--spacing-md) var(--spacing-sm);
  }

  header nav {
    gap: var(--spacing-md);
    font-size: 0.9rem;
  }

  header nav a {
    display: none;
  }

  header nav a:first-child {
    display: inline;
  }

  .hero {
    padding: 3rem var(--spacing-md) 2rem;
    min-height: 300px;
  }

  .hero h1 {
    font-size: 1.6rem;
  }

  .col-6 {
    flex: 0 0 100%;
  }

  .col-4 {
    flex: 0 0 50%;
  }

  .col-3 {
    flex: 0 0 50%;
  }

  .grid {
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  }

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

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

  .filter-btn {
    width: 100%;
  }

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

  .cookie-consent p {
    order: 1;
  }

  .cookie-consent .btn {
    order: 2;
    width: 100%;
  }
}