:root {
  /* Colors */
  --c-text-main: #2b2b2b; /* Dark Gray (Sumi) */
  --c-text-light: #fdfbf7;
  --c-accent: #d4af37; /* Gold */
  --c-accent-dark: #8c640c;
  --c-bg: #fdfbf7; /* Washi White */
  --c-bg-dark: #1a1a1a;
  --c-border: #e0d8cc;
  
  /* Fonts */
  --font-serif: 'Zen Old Mincho', 'Shippori Mincho', serif;
  --font-sans: 'Helvetica Neue', 'Arial', sans-serif;
  
  /* Spacing */
  --sp-sm: 16px;
  --sp-md: 32px;
  --sp-lg: 64px;
  --sp-xl: 120px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-serif);
  color: var(--c-text-main);
  background-color: var(--c-bg);
  line-height: 2.0;
  letter-spacing: 0.1em;
  -webkit-font-smoothing: antialiased;
}

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

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

a:hover {
  opacity: 0.7;
}

/* Utility - Vertical Text */
.t-vert {
  writing-mode: vertical-rl;
  text-orientation: upright;
}

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100px; /* Vertical sidebar style for PC */
  height: 100vh;
  background-color: rgba(253, 251, 247, 0.95);
  border-right: 1px solid var(--c-border);
  z-index: 1000;
  writing-mode: vertical-rl;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 40px 0;
}

.logo {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: 0.2em;
}

.logo-en {
  font-size: 0.8rem;
  margin-right: 10px;
  font-family: var(--font-sans);
  text-transform: uppercase;
  color: var(--c-accent-dark);
}

.global-nav ul {
  list-style: none;
  display: flex;
  gap: 30px;
}

.global-nav a {
  font-size: 1.1rem;
  letter-spacing: 0.15em;
  position: relative;
}

.global-nav a::after {
  content: '';
  position: absolute;
  top: 0;
  left: -10px;
  width: 1px;
  height: 0;
  background-color: var(--c-accent);
  transition: height 0.3s;
}

.global-nav a:hover::after {
  height: 100%;
}

/* Main Layout Adjustment for Sidebar */
main {
  margin-left: 100px;
}

/* Hero Section */
.hero {
  position: relative;
  height: 100vh;
  overflow: hidden;
}

.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scale(1.05);
  animation: bgZoom 20s infinite alternate;
}

@keyframes bgZoom {
  to { transform: scale(1); }
}

.hero-content {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: var(--c-text-light); /* Assuming dark image */
  text-shadow: 0 2px 4px rgba(0,0,0,0.5);
  height: 60vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 40px;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 900;
  line-height: 1.5;
  letter-spacing: 0.3em;
  display: flex;
  gap: 2rem;
}

.hero-lead {
  font-size: 1.2rem;
  height: 200px;
}

.scroll-down {
  position: absolute;
  bottom: 40px;
  right: 50%;
  transform: translateX(50%);
  color: var(--c-text-light);
  font-family: var(--font-sans);
  font-size: 0.8rem;
  letter-spacing: 0.2em;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.scroll-down::after {
  content: '';
  width: 1px;
  height: 60px;
  background-color: var(--c-text-light);
  margin-top: 10px;
  animation: scrollLine 2s infinite;
}

@keyframes scrollLine {
  0% { transform: scaleY(0); transform-origin: top; }
  50% { transform: scaleY(1); transform-origin: top; }
  51% { transform: scaleY(1); transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

/* Sections Common */
.section {
  padding: var(--sp-xl) var(--sp-lg);
}

.container {
  max-width: 1000px;
  margin: 0 auto;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--sp-lg);
}

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

.section-image {
  flex: 1;
}

.section-image img {
  width: 100%;
  border-radius: 4px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.05);
}

.section-content {
  flex: 1;
  height: 400px; /* Height for vertical text flow */
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
}

.section-title {
  font-size: 2rem;
  font-weight: 700;
  margin-left: var(--sp-md);
  color: var(--c-accent-dark);
}

.section-title-horiz {
  font-size: 2rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: var(--sp-sm);
  color: var(--c-accent-dark);
}

.section-desc {
  text-align: center;
  margin-bottom: var(--sp-lg);
  color: #666;
}

/* About Section */
.reverse-layout {
  flex-direction: row-reverse;
}

/* Events */
.event-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--sp-md);
}

.event-card {
  background: white;
  border: 1px solid var(--c-border);
  transition: transform 0.3s;
}

.event-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 20px rgba(0,0,0,0.05);
}

.event-card .card-image img {
  width: 100%;
  height: 250px;
  object-fit: cover;
}

.card-content {
  padding: var(--sp-md);
}

.card-content h4 {
  font-size: 1.4rem;
  margin-bottom: var(--sp-sm);
  border-bottom: 2px solid var(--c-accent);
  display: inline-block;
  padding-bottom: 5px;
}

.card-content .date {
  font-family: var(--font-sans);
  color: var(--c-accent-dark);
  font-weight: bold;
  margin-bottom: var(--sp-sm);
}

/* Access */
.access-content {
  display: flex;
  gap: var(--sp-lg);
}

.access-info {
  flex: 1;
  background: white;
  padding: var(--sp-md);
  border: 1px solid var(--c-border);
}

.access-info h4 {
  font-size: 1.4rem;
  margin-bottom: var(--sp-md);
}

.access-map {
  flex: 1;
  height: 400px;
  background-color: #eee;
  display: flex;
  justify-content: center;
  align-items: center;
}

/* Footer */
.footer {
  background-color: var(--c-bg-dark);
  color: #999;
  padding: var(--sp-lg) 0;
  text-align: center;
  margin-left: 100px; /* match sidebar */
}

.footer-logo {
  font-size: 2rem;
  color: var(--c-text-light);
  margin-bottom: var(--sp-md);
  font-family: var(--font-serif);
}

.footer-nav {
  list-style: none;
  display: flex;
  justify-content: center;
  gap: var(--sp-md);
  margin-bottom: var(--sp-md);
}

.copyright {
  font-family: var(--font-sans);
  font-size: 0.8rem;
}

/* Responsive */
@media (max-width: 768px) {
  .header {
    width: 100%;
    height: 60px;
    writing-mode: horizontal-tb;
    flex-direction: row;
    padding: 0 20px;
    border-right: none;
    border-bottom: 1px solid var(--c-border);
    justify-content: space-between;
  }
  
  .global-nav {
    display: none; /* Simplify for mobile for now (hamburger menu needed ideally) */
  }

  main {
    margin-left: 0;
    margin-top: 60px;
  }
  
  .hero-title {
    font-size: 2.5rem;
  }
  
  .container, .reverse-layout, .access-content {
    flex-direction: column;
    gap: var(--sp-md);
  }
  
  .section-content {
    width: 100%;
    height: auto;
    writing-mode: horizontal-tb;
    text-align: left;
  }
  
  .t-vert {
    writing-mode: horizontal-tb; /* Release vertical text on mobile */
  }
  
  .section-title {
    margin-left: 0;
    margin-bottom: var(--sp-sm);
    border-bottom: 2px solid var(--c-accent);
    display: inline-block;
  }

  .event-grid {
    grid-template-columns: 1fr;
  }
  
  .footer {
    margin-left: 0;
  }
}