/* CSS Variables */
:root {
  --color-primary: #8E9A7A;
  --color-secondary: #E8E2D8;
  --color-text: #343434;
  --color-text-light: #9A8F86;
  --color-bg: #E8E2D8;
  --color-bg-secondary: #B8ADA0;
  --color-accent: #8E9A7A;
  --color-divider: #9A8F86;
  
  --font-heading: 'Libre Baskerville', serif;
  --font-body: 'Inter', sans-serif;
  
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-xxl: 4rem;
  
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  
  --shadow-sm: 0 2px 4px rgba(52, 52, 52, 0.1);
  --shadow-md: 0 4px 8px rgba(52, 52, 52, 0.15);
  --shadow-lg: 0 8px 16px rgba(52, 52, 52, 0.2);
  
  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;
}

/* Reset & Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family: var(--font-body);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 400;
  line-height: 1.3;
  margin-bottom: var(--space-md);
  color: var(--color-text);
}

h1 {
  font-size: clamp(2rem, 5vw, 3rem);
}

h2 {
  font-size: clamp(1.5rem, 4vw, 2.25rem);
}

h3 {
  font-size: clamp(1.25rem, 3vw, 1.75rem);
}

p {
  margin-bottom: var(--space-md);
}

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

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

/* Header */
.site-header {
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-divider);
  padding: var(--space-md) var(--space-lg);
  position: relative;
}

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

.brand-text {
  font-family: var(--font-heading);
  font-size: clamp(1rem, 2vw, 1.75rem);
  color: var(--color-text);
  font-weight: 400;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.nav-list {
  display: flex;
  list-style: none;
  gap: var(--space-lg);
  align-items: center;
}

.nav-link {
  color: var(--color-text);
  font-size: 0.95rem;
  padding: var(--space-sm) 0;
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background-color: var(--color-accent);
  transition: width var(--transition-base);
}

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

.burger-button {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
  color: var(--color-text);
  font-size: 1.5rem;
  order: 999;
}

.burger-icon {
  display: block;
  width: 24px;
  height: 24px;
}

/* Mobile Navigation */
.mobile-nav {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-divider);
  padding: var(--space-lg);
  z-index: 1000;
}

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

.mobile-nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.mobile-nav-link {
  color: var(--color-text);
  font-size: 1rem;
  padding: var(--space-sm) 0;
  display: block;
}

/* Main Content */
.main-content {
  flex: 1;
  width: 100%;
}

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

.section {
  margin-bottom: var(--space-xxl);
}

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

/* Hero Section */
.hero-section {
  padding: var(--space-xxl) var(--space-lg);
  text-align: center;
  background-color: var(--color-bg-secondary);
  position: relative;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}

.hero-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(232, 226, 216, 0.85);
  z-index: 1;
}

.hero-section .container {
  position: relative;
  z-index: 2;
}

.hero-home {
  background-image: url('../media/freepik__the-style-is-candid-image-photography-with-natural__24198.webp');
}

.hero-materials {
  background-image: url('../media/freepik__the-style-is-candid-image-photography-with-natural__24198.webp');
}

.hero-usage {
  background-image: url('../media/freepik__the-style-is-candid-image-photography-with-natural__24198.webp');
}

.hero-lifespan {
  background-image: url('../media/freepik__the-style-is-candid-image-photography-with-natural__24198.webp');
}

.hero-contact {
  background-image: url('../media/freepik__the-style-is-candid-image-photography-with-natural__24200.webp');
}

.hero-title {
  margin-bottom: var(--space-lg);
}

.hero-text {
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  max-width: 800px;
  margin: 0 auto var(--space-xl);
  color: var(--color-text-light);
}

/* Banner */
.banner-image {
  width: 100%;
  height: 400px;
  object-fit: cover;
  border-radius: var(--radius-md);
  margin-bottom: var(--space-lg);
  box-shadow: var(--shadow-md);
}

/* Content Sections */
.content-section {
  padding: var(--space-xl) 0;
}

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

.content-card {
  background-color: var(--color-bg);
  padding: var(--space-lg);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-divider);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

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

.card-image {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-md);
}

.card-title {
  font-size: 1.5rem;
  margin-bottom: var(--space-sm);
}

.card-text {
  color: var(--color-text-light);
  font-size: 0.95rem;
}

/* Material Cards */
.material-card {
  background-color: var(--color-bg);
  padding: var(--space-lg);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-divider);
  margin-bottom: var(--space-lg);
}

.material-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-md);
  cursor: pointer;
}

.material-title {
  margin: 0;
  font-size: 1.5rem;
}

.expand-icon {
  font-size: 1.25rem;
  transition: transform var(--transition-base);
}

.material-card.expanded .expand-icon {
  transform: rotate(180deg);
}

.material-content {
  display: none;
}

.material-card.expanded .material-content {
  display: block;
}

.material-info {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-md);
  margin-top: var(--space-md);
}

.info-item {
  padding: var(--space-sm);
}

.info-label {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--color-text-light);
  margin-bottom: var(--space-xs);
}

.info-value {
  color: var(--color-text);
}

/* Comparison Table */
.comparison-table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--space-lg) 0;
  background-color: var(--color-bg);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.comparison-table th,
.comparison-table td {
  padding: var(--space-md);
  text-align: left;
  border-bottom: 1px solid var(--color-divider);
}

.comparison-table th {
  background-color: var(--color-bg-secondary);
  font-weight: 600;
  color: var(--color-text);
}

.comparison-table tr:last-child td {
  border-bottom: none;
}

/* Timeline */
.timeline-container {
  position: relative;
  padding: var(--space-lg) 0;
}

.timeline-item {
  display: flex;
  gap: var(--space-lg);
  margin-bottom: var(--space-xl);
  position: relative;
}

.timeline-marker {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: var(--color-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-bg);
  font-weight: 600;
  flex-shrink: 0;
}

.timeline-content {
  flex: 1;
  padding: var(--space-md);
  background-color: var(--color-bg);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-divider);
}

/* Contact Form */
.contact-section {
  padding: var(--space-xl) 0;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  margin-top: var(--space-lg);
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.info-block {
  padding: var(--space-md);
  background-color: var(--color-bg);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-divider);
}

.info-label {
  font-weight: 600;
  margin-bottom: var(--space-sm);
  color: var(--color-text-light);
}

.info-value {
  color: var(--color-text);
  font-size: 1.1rem;
}

.map-container {
  width: 100%;
  height: 400px;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-divider);
}

.map-iframe {
  width: 100%;
  height: 100%;
  border: none;
}

.form-container {
  background-color: var(--color-bg);
  padding: var(--space-lg);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-divider);
}

.form-group {
  margin-bottom: var(--space-lg);
}

.form-label {
  display: block;
  margin-bottom: var(--space-sm);
  font-weight: 500;
  color: var(--color-text);
}

.form-input,
.form-textarea {
  width: 100%;
  padding: var(--space-md);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-sm);
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 1rem;
  transition: border-color var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-accent);
}

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

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

.checkbox-input {
  margin-top: 4px;
  flex-shrink: 0;
}

.checkbox-label {
  font-size: 0.9rem;
  color: var(--color-text-light);
}

.submit-button {
  background-color: var(--color-accent);
  color: var(--color-bg);
  border: none;
  padding: var(--space-md) var(--space-xl);
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-family: var(--font-body);
  cursor: pointer;
  transition: background-color var(--transition-base), transform var(--transition-fast);
}

.submit-button:hover {
    color: white;
  background-color: var(--color-text);
  transform: translateY(-2px);
}

.submit-button:active {
  transform: translateY(0);
}

.submit-button {
  display: inline-block;
  text-decoration: none;
}

/* Footer */
.site-footer {
  background-color: var(--color-text);
  border-top: 1px solid var(--color-divider);
  padding: var(--space-xl) var(--space-lg);
  margin-top: var(--space-xxl);
}

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

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-lg);
  margin-bottom: var(--space-lg);
}

.footer-section {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer-title {
  font-size: 1.1rem;
  margin-bottom: var(--space-sm);
  color: var(--color-bg);
}

.footer-link {
  color: var(--color-bg);
  font-size: 0.9rem;
  opacity: 0.9;
}

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

.footer-bottom {
  text-align: center;
  padding-top: var(--space-lg);
  border-top: 1px solid rgba(232, 226, 216, 0.3);
  color: var(--color-bg);
  font-size: 0.9rem;
  opacity: 0.8;
}

/* Privacy Popup */
.privacy-popup {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(52, 52, 52, 0.8);
  z-index: 10000;
  align-items: center;
  justify-content: center;
  padding: var(--space-lg);
}

.privacy-popup.active {
  display: flex;
}

.popup-content {
  background-color: var(--color-bg);
  max-width: 600px;
  width: 100%;
  max-height: 80vh;
  overflow-y: auto;
  padding: var(--space-xl);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  position: relative;
}

.popup-close {
  position: absolute;
  top: var(--space-md);
  right: var(--space-md);
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--color-text);
  cursor: pointer;
  padding: var(--space-sm);
  line-height: 1;
}

.popup-title {
  margin-bottom: var(--space-lg);
}

.popup-text {
  color: var(--color-text-light);
  font-size: 0.95rem;
  line-height: 1.7;
}

.popup-buttons {
  display: flex;
  gap: var(--space-md);
  margin-top: var(--space-lg);
}

.popup-button {
  flex: 1;
  padding: var(--space-md);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-sm);
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  cursor: pointer;
  transition: background-color var(--transition-fast);
}

.popup-button.accept {
  background-color: var(--color-accent);
  color: var(--color-bg);
  border-color: var(--color-accent);
}

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

.popup-button.accept:hover {
  background-color: var(--color-text);
}

/* Thank You Page */
.thank-you-section {
  text-align: center;
  padding: var(--space-xxl) var(--space-lg);
  min-height: 60vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.thank-you-title {
  margin-bottom: var(--space-lg);
}

.thank-you-text {
  font-size: 1.1rem;
  color: var(--color-text-light);
  max-width: 600px;
  margin-bottom: var(--space-xl);
}

/* 404 Page */
.error-section {
  text-align: center;
  padding: var(--space-xxl) var(--space-lg);
  min-height: 60vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.error-code {
  font-size: clamp(4rem, 10vw, 8rem);
  font-weight: 300;
  color: var(--color-text-light);
  margin-bottom: var(--space-md);
}

.error-title {
  margin-bottom: var(--space-lg);
}

.error-text {
  font-size: 1.1rem;
  color: var(--color-text-light);
  max-width: 600px;
  margin-bottom: var(--space-xl);
}

/* Utility Classes */
.text-center {
  text-align: center;
}

.mt-sm {
  margin-top: var(--space-sm);
}

.mt-md {
  margin-top: var(--space-md);
}

.mt-lg {
  margin-top: var(--space-lg);
}

.mb-sm {
  margin-bottom: var(--space-sm);
}

.mb-md {
  margin-bottom: var(--space-md);
}

.mb-lg {
  margin-bottom: var(--space-lg);
}

.date {
  font-style: italic;
  color: var(--color-text-light);
}

/* Responsive Design */
@media (max-width: 768px) {
  .nav-list {
    display: none;
  }
  
  .burger-button {
    display: block;
  }
  
  .contact-grid {
    grid-template-columns: 1fr;
  }
  
  .content-grid {
    grid-template-columns: 1fr;
  }
  
  .material-info {
    grid-template-columns: 1fr;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
  }
  
  .timeline-item {
    flex-direction: column;
  }
  
  .timeline-marker {
    align-self: flex-start;
  }
}

@media (max-width: 480px) {
  html {
    font-size: 14px;
  }
  
  .container {
    padding: var(--space-md);
  }
  
  .hero-section {
    padding: var(--space-xl) var(--space-md);
  }
  
  .section {
    margin-bottom: var(--space-xl);
  }
}

@media (max-width: 320px) {
  html {
    font-size: 12px;
  }
  
  .header-container {
    padding: var(--space-sm);
  }
  
  .container {
    padding: var(--space-sm);
  }
}