:root {
  /* Design System: Japanese Zen / Mountain Retreat */
  
  /* Base Colors */
  --bg-base: #f7f9f6; /* Soft rice paper white */
  --bg-surface: #ffffff; /* Clean white */
  --bg-alt: #eef1ec; /* Light stone grey */
  --text-main: #232c27; /* Charcoal pine */
  --text-muted: #5c6662; /* Soft moss grey */
  
  /* Accent Colors */
  --accent-pine: #1a362d; /* Deep Pine Green */
  --accent-bamboo: #c89f55; /* Warm Bamboo Gold */
  --accent-sora: #779bb5; /* Calm Sky Blue */
  
  /* Gradients */
  --gradient-primary: linear-gradient(135deg, var(--accent-pine) 0%, #2a4a3f 100%);
  --gradient-gold: linear-gradient(135deg, var(--accent-bamboo) 0%, #dfb56b 100%);
  
  /* UI Elements */
  --glass-bg: rgba(247, 249, 246, 0.85);
  --glass-border: rgba(200, 159, 85, 0.2);
  --shadow-soft: 0 12px 40px rgba(26, 54, 45, 0.06);
  --shadow-hover: 0 16px 50px rgba(26, 54, 45, 0.12);
  --radius-sm: 12px;
  --radius-md: 16px;
  --radius-lg: 20px;
  
  /* Layout */
  --max-width: 1320px;
  --section-spacing-desktop: 120px;
  --section-spacing-tablet: 80px;
  --section-spacing-mobile: 60px;
  --padding-desktop: 32px;
  --padding-tablet: 24px;
  --padding-mobile: 16px;
  
  /* Typography */
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-serif: 'Playfair Display', Georgia, serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-base);
  color: var(--text-main);
  line-height: 1.6;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif);
  font-weight: 500;
  color: var(--accent-pine);
  line-height: 1.2;
}

a {
  text-decoration: none;
  color: inherit;
  transition: all 0.3s ease;
}

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

/* Layout Utilities */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--padding-desktop);
}

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

/* Header & Navigation */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--glass-border);
  z-index: 1000;
  transition: all 0.3s ease;
}

.site-header.scrolled {
  box-shadow: var(--shadow-soft);
  background: rgba(247, 249, 246, 0.95);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 80px;
}

.brand-logo {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--accent-pine);
  display: flex;
  align-items: center;
  gap: 8px;
}

.brand-logo span {
  color: var(--accent-bamboo);
}

.nav-links {
  display: flex;
  gap: 40px;
  list-style: none;
}

.nav-links a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-muted);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0%;
  height: 2px;
  background: var(--accent-bamboo);
  transition: width 0.3s ease;
}

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

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  flex-direction: column;
  gap: 5px;
}

.mobile-menu-btn span {
  width: 24px;
  height: 2px;
  background: var(--accent-pine);
  transition: 0.3s;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 28px;
  border-radius: var(--radius-md);
  font-weight: 500;
  font-size: 1rem;
  cursor: pointer;
  transition: transform 0.3s ease, box-shadow 0.3s ease, background 0.3s ease;
  border: none;
}

.btn-primary {
  background: var(--gradient-primary);
  color: #fff;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(26, 54, 45, 0.2);
  color: #fff;
}

.btn-gold {
  background: var(--gradient-gold);
  color: #fff;
}

.btn-gold:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(200, 159, 85, 0.3);
  color: #fff;
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--accent-pine);
  color: var(--accent-pine);
}

.btn-outline:hover {
  background: rgba(26, 54, 45, 0.05);
  transform: translateY(-2px);
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 80px;
  position: relative;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-content h1 {
  font-size: 4rem;
  margin-bottom: 24px;
}

.hero-content p {
  font-size: 1.125rem;
  color: var(--text-muted);
  margin-bottom: 40px;
  max-width: 90%;
}

.hero-actions {
  display: flex;
  gap: 20px;
  margin-bottom: 24px;
}

.hero-disclaimer {
  font-size: 0.75rem;
  color: var(--text-muted);
  opacity: 0.8;
}

.hero-visual {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-soft);
  transform: translateZ(0);
}

.hero-visual::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(26,54,45,0.1) 0%, rgba(0,0,0,0) 100%);
  pointer-events: none;
}

.hero-visual img {
  width: 100%;
  height: 600px;
  object-fit: cover;
  transition: transform 10s ease;
}

.hero-visual:hover img {
  transform: scale(1.05);
}

/* Standard Page Header */
.page-header {
  padding: 160px 0 80px;
  text-align: center;
  background: var(--bg-alt);
  border-bottom: 1px solid var(--glass-border);
}

.page-header h1 {
  font-size: 3rem;
  margin-bottom: 16px;
}

.page-header p {
  color: var(--text-muted);
  font-size: 1.125rem;
  max-width: 600px;
  margin: 0 auto;
}

/* Content Sections */
.content-section {
  background: var(--bg-surface);
  border-radius: var(--radius-lg);
  padding: 60px;
  box-shadow: var(--shadow-soft);
  margin-bottom: 40px;
}

.content-section h2 {
  font-size: 2rem;
  margin-bottom: 24px;
}

.content-section p {
  margin-bottom: 16px;
  color: var(--text-muted);
}

.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-header h2 {
  font-size: 2.5rem;
  margin-bottom: 16px;
}

.section-header p {
  color: var(--text-muted);
}

/* Info Cards (Legal / Eco / Features) */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}

.feature-card {
  background: var(--bg-surface);
  padding: 40px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
  border: 1px solid rgba(26,54,45,0.03);
  transition: transform 0.3s ease;
}

.feature-card:hover {
  transform: translateY(-8px);
}

.feature-icon {
  width: 48px;
  height: 48px;
  background: rgba(200, 159, 85, 0.1);
  color: var(--accent-bamboo);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
}

.feature-icon svg {
  width: 24px;
  height: 24px;
}

.feature-card h3 {
  font-size: 1.25rem;
  margin-bottom: 16px;
}

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

/* Contact Form */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-group label {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--accent-pine);
}

.form-group input,
.form-group textarea {
  padding: 16px;
  border: 1px solid rgba(26,54,45,0.2);
  border-radius: var(--radius-sm);
  background: var(--bg-base);
  font-family: var(--font-sans);
  font-size: 1rem;
  transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent-bamboo);
  background: var(--bg-surface);
}

/* Footer */
.site-footer {
  background: var(--accent-pine);
  color: rgba(255,255,255,0.7);
  padding: 80px 0 40px;
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 60px;
  margin-bottom: 60px;
}

.footer-brand .brand-logo {
  color: #fff;
  margin-bottom: 16px;
}

.footer-brand p {
  font-size: 0.9rem;
  max-width: 300px;
  line-height: 1.8;
}

.footer-links h4 {
  color: #fff;
  font-family: var(--font-sans);
  font-size: 1rem;
  margin-bottom: 24px;
}

.footer-links ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-links a {
  font-size: 0.9rem;
}

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

.footer-bottom {
  padding-top: 40px;
  border-top: 1px solid rgba(255,255,255,0.1);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
}

/* Animations */
.fade-in-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.fade-in-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Media Queries */
@media (max-width: 1024px) {
  :root {
    --padding-desktop: var(--padding-tablet);
  }
  
  .hero-content h1 {
    font-size: 3rem;
  }
  
  .hero-visual img {
    height: 500px;
  }
  
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  :root {
    --padding-desktop: var(--padding-mobile);
  }
  
  .nav-links {
    position: fixed;
    top: 80px;
    left: -100%;
    width: 100%;
    height: calc(100vh - 80px);
    background: var(--bg-surface);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 32px;
    transition: 0.3s ease-in-out;
  }
  
  .nav-links.active {
    left: 0;
  }
  
  .nav-links .btn {
    display: inline-flex;
  }
  
  .mobile-menu-btn {
    display: flex;
  }
  
  .mobile-menu-btn.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }
  .mobile-menu-btn.active span:nth-child(2) {
    opacity: 0;
  }
  .mobile-menu-btn.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }
  
  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
    padding-top: 40px;
  }
  
  .hero-content p {
    margin: 0 auto 40px;
  }
  
  .hero-actions {
    justify-content: center;
    flex-direction: column;
  }
  
  .features-grid {
    grid-template-columns: 1fr;
  }
  
  .contact-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  
  .footer-bottom {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }
}