:root {
  --primary-color: #003366;
  /* Deep Navy */
  --accent-color: #C5A059;
  /* Muted Gold */
  --highlight-color: #E63946;
  /* Alert/Attention Red */
  --bg-color: #F8F9FA;
  --text-color: #2D3748;
  --text-light: #718096;
  --white: #ffffff;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.24);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --font-base: 'Noto Sans JP', sans-serif;
}

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

body {
  font-family: var(--font-base);
  background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
  min-height: 100vh;
  color: var(--text-color);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  background-attachment: fixed;
  /* Parallax-like feel */
}

/* Optional: Add a subtle overlay pattern for texture */
body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: radial-gradient(#003366 0.5px, transparent 0.5px);
  background-size: 20px 20px;
  opacity: 0.05;
  z-index: -1;
  pointer-events: none;
}

.container {
  max-width: 800px;
  /* Slightly punchier width */
  margin: 0 auto;
  padding: 60px 20px;
}

/* Banner Section */
.banner-wrapper {
  width: 100%;
  margin-bottom: 30px;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 15px 35px rgba(0, 51, 102, 0.15);
  /* Richer shadow */
  transition: transform 0.3s ease;
}

.banner-wrapper:hover {
  transform: translateY(-2px);
}

.banner-img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

/* Header Title */
.page-title {
  text-align: center;
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: 30px;
  padding-bottom: 20px;
  border-bottom: 2px solid var(--accent-color);
  line-height: 1.4;
  text-shadow: 1px 1px 0 #fff;
}

/* Content Sections */
.content-section {
  background: rgba(255, 255, 255, 0.95);
  /* Slight glass effect */
  backdrop-filter: blur(10px);
  padding: 35px 40px;
  border-radius: 16px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
  margin-bottom: 25px;
  border: 1px solid rgba(255, 255, 255, 0.6);
}

.greeting-text {
  margin-bottom: 20px;
  white-space: normal;
  /* Fix spacing/indent issues */
  text-align: justify;
  /* Cleaner block text */
}

.greeting-text p {
  margin-bottom: 1rem;
  /* Tighter standard spacing */
  text-indent: 0;
  /* Ensure no auto-indent */
}

.note-box {
  background-color: #FFFAF0;
  border-left: 4px solid var(--accent-color);
  padding: 15px 20px;
  margin: 20px 0;
  font-size: 0.95rem;
  color: #555;
}

/* Event Details Card */
.event-details {
  background: linear-gradient(to right bottom, #ffffff, #fdfdfd);
  border: 1px solid #e2e8f0;
}

.section-header {
  font-size: 1.5rem;
  color: var(--primary-color);
  margin-bottom: 25px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

.section-header::before,
.section-header::after {
  content: '';
  display: block;
  width: 30px;
  height: 2px;
  background-color: var(--accent-color);
}

.details-list dl {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 15px 20px;
  margin-bottom: 20px;
}

.details-list dt {
  font-weight: 700;
  color: var(--primary-color);
  background: #EDF2F7;
  padding: 8px 12px;
  border-radius: 4px;
  display: flex;
  align-items: center;
}

.details-list dd {
  padding: 8px 0;
  display: flex;
  align-items: center;
}

/* CTA Section */
.cta-section {
  text-align: center;
  margin: 50px 0;
}

.btn-primary {
  display: inline-block;
  background-color: var(--highlight-color);
  color: var(--white);
  padding: 18px 50px;
  font-size: 1.25rem;
  font-weight: 700;
  text-decoration: none;
  border-radius: 50px;
  box-shadow: 0 4px 15px rgba(230, 57, 70, 0.4);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(230, 57, 70, 0.6);
  background-color: #d62f3c;
  /* Slightly darker on hover */
}

.btn-secondary {
  display: inline-block;
  margin-top: 20px;
  color: var(--primary-color);
  text-decoration: underline;
  font-weight: 500;
  transition: color 0.2s;
}

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

/* Contact Footer */
.footer-contact {
  background-color: #2D3748;
  color: #fff;
  padding: 40px;
  border-radius: 12px;
  margin-top: 60px;
}

.footer-contact h3 {
  font-size: 1.2rem;
  margin-bottom: 20px;
  border-bottom: 1px solid #4A5568;
  padding-bottom: 10px;
}

.contact-info p {
  margin-bottom: 8px;
  display: flex;
  gap: 10px;
}

.contact-label {
  min-width: 80px;
  color: #A0AEC0;
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
  .container {
    padding: 20px 15px;
  }

  .content-section {
    padding: 25px 20px;
  }

  .details-list dl {
    grid-template-columns: 1fr;
    gap: 5px;
  }

  .details-list dt {
    width: 100%;
  }

  .details-list dd {
    padding-left: 10px;
    margin-bottom: 15px;
  }

  .btn-primary {
    width: 100%;
    padding: 15px 20px;
  }
}