:root {
  /* Modern Palette */
  --primary-color: #0d47a1;
  /* Deep Blue */
  --secondary-color: #1976d2;
  /* Lighter Blue */
  --accent-color: #00b4d8;
  /* Cyan/Teal Accent */
  --accent-hover: #0096c7;
  --text-primary: #1e293b;
  --text-secondary: #475569;
  --bg-page: #f8fafc;
  --bg-card: #ffffff;
  --border-radius: 16px;
  --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
  --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.05), 0 4px 6px -2px rgba(0, 0, 0, 0.025);
  --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.05), 0 10px 10px -5px rgba(0, 0, 0, 0.02);
  --font-main: "Noto Sans JP", sans-serif;
  --font-display: "Outfit", sans-serif;
}

body {
  margin: 0;
  font-family: var(--font-main);
  color: var(--text-primary);
  background-color: var(--bg-page);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--secondary-color);
  text-decoration: none;
  transition: all 0.2s ease;
}

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

/* ===== Header & Nav ===== */
header {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: var(--shadow-sm);
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-brand {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.brand-sub {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-secondary);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.brand-main {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-color);
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 1.5rem;
  margin: 0;
  padding: 0;
}

.nav-links a {
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.95rem;
  padding: 0.5rem 0.8rem;
  border-radius: 8px;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--primary-color);
  background: #f1f5f9;
}

.nav-links i {
  font-size: 0.9rem;
  opacity: 0.8;
}

/* ===== Hero Section ===== */
.hero {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: white;
  padding: 6rem 2rem;
  text-align: center;
  position: relative;
  overflow: hidden;
  margin-bottom: 3rem;
}

/* Abstract Pattern Overlay */
.hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image:
    radial-gradient(circle at 10% 20%, rgba(255, 255, 255, 0.1) 0%, transparent 20%),
    radial-gradient(circle at 90% 80%, rgba(255, 255, 255, 0.1) 0%, transparent 20%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
  z-index: 1;
  animation: fadeIn 0.8s ease-out;
}

.hero-subtitle {
  font-size: 1.1rem;
  opacity: 0.9;
  margin-bottom: 1rem;
  font-weight: 500;
  letter-spacing: 0.05em;
}

.hero-title {
  font-family: var(--font-main);
  font-size: 3rem;
  font-weight: 700;
  margin: 0 0 1.5rem 0;
  line-height: 1.3;
  text-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}

.hero-date {
  display: inline-block;
  background: rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(4px);
  padding: 0.6rem 1.5rem;
  border-radius: 50px;
  font-size: 1.2rem;
  font-weight: 500;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ===== Main container ===== */
main {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 1.5rem 4rem 1.5rem;
}

/* ===== Section Styling ===== */
section {
  background: var(--bg-card);
  border-radius: var(--border-radius);
  padding: 2.5rem;
  margin-bottom: 2.5rem;
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(0, 0, 0, 0.03);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

section:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

section h2 {
  font-size: 1.5rem;
  color: var(--primary-color);
  margin-top: 0;
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.8rem;
  border-bottom: 2px solid #e2e8f0;
  padding-bottom: 0.8rem;
}

section h2 i {
  color: var(--accent-color);
}

/* News Section */
.news-list {
  list-style: none;
  padding: 0;
}

.news-list li {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.8rem 0;
  border-bottom: 1px dashed #e2e8f0;
}

.date-badge {
  background: #f1f5f9;
  color: var(--text-secondary);
  font-size: 0.85rem;
  padding: 0.2rem 0.6rem;
  border-radius: 6px;
  font-family: var(--font-display);
  font-weight: 500;
}

/* Highlight Box */
.highlight-box {
  background: #f0f9ff;
  border-left: 4px solid var(--accent-color);
  padding: 1.5rem;
  border-radius: 8px;
  margin: 1.5rem 0;
  display: flex;
  gap: 1.2rem;
  align-items: flex-start;
}

.highlight-box i {
  font-size: 1.5rem;
  color: var(--accent-color);
  margin-top: 0.2rem;
}

.highlight-box p {
  margin: 0;
  font-weight: 500;
  color: #0c4a6e;
}

/* Info Grid */
.info-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin-bottom: 2rem;
}

.info-item {
  background: #f8fafc;
  padding: 1.5rem;
  border-radius: 12px;
  text-align: center;
}

.info-item h3 {
  margin: 0 0 0.5rem 0;
  font-size: 1rem;
  color: var(--text-secondary);
  font-weight: 600;
}

.large-text {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0.5rem 0;
}

.small-link {
  font-size: 0.9rem;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  margin-top: 0.5rem;
}

/* Timeline/Schedule */
.schedule-timeline {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-top: 1rem;
}

.timeline-item {
  display: flex;
  align-items: center;
  background: white;
  border: 1px solid #e2e8f0;
  border-radius: 10px;
  padding: 1rem;
  transition: border-color 0.2s;
}

.timeline-item:hover {
  border-color: var(--accent-color);
}

.timeline-date {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--primary-color);
  width: 160px;
  flex-shrink: 0;
}

.timeline-content {
  font-weight: 500;
}

/* Buttons */
.btn-primary,
.btn-accent {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.8rem 1.5rem;
  border-radius: 50px;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Primary Button Action */
.action-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  background: #f8fafc;
  padding: 2rem;
  border-radius: 12px;
  text-align: center;
}

.btn-primary {
  background: var(--primary-color);
  color: white;
  box-shadow: 0 4px 10px rgba(13, 71, 161, 0.3);
}

.btn-primary:hover {
  background: #1565c0;
  transform: translateY(-2px);
  box-shadow: 0 6px 15px rgba(13, 71, 161, 0.4);
  color: white;
}


/* Secondary Button */
.btn-secondary {
  background: white;
  color: var(--secondary-color);
  border: 1px solid #e2e8f0;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
}

.btn-secondary:hover {
  background: #f8fafc;
  border-color: var(--accent-color);
  color: var(--accent-color);
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.05);
}

/* Accent Button (CTA) */
.cta-section {
  text-align: center;
  background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
  border: 1px solid #bae6fd;
}

.btn-accent {
  background: var(--accent-color);
  color: white;
  font-size: 1.1rem;
  padding: 1rem 2rem;
  box-shadow: 0 4px 12px rgba(0, 180, 216, 0.4);
}

.btn-accent:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(0, 180, 216, 0.5);
  color: white;
}

.marker {
  background: linear-gradient(120deg, rgba(255, 255, 255, 0) 0%, rgba(255, 255, 255, 0) 100%);
  background-repeat: no-repeat;
  background-size: 100% 40%;
  background-position: 0 88%;
  background-color: #fef3c7;
  padding: 0 0.2rem;
  font-weight: 600;
  color: #92400e;
}

/* Contact Box */
.contact-box {
  background: #1e293b;
  color: white;
  padding: 2rem;
  border-radius: 12px;
  text-align: center;
}

.contact-name {
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.contact-email {
  font-family: var(--font-display);
  font-size: 1.2rem;
  color: var(--accent-color);
  margin: 0.5rem 0;
}

.contact-note {
  font-size: 0.85rem;
  opacity: 0.7;
}

/* Committee */
.committee-list {
  list-style: none;
  padding: 0;
}

.committee-list li {
  margin-bottom: 0.8rem;
  display: flex;
  align-items: baseline;
  gap: 0.8rem;
  border-bottom: 1px solid #f1f5f9;
  padding-bottom: 0.8rem;
}

.committee-list .role {
  background: #e2e8f0;
  color: #475569;
  font-size: 0.75rem;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  font-weight: 700;
  width: 60px;
  text-align: center;
}

.committee-list .name {
  font-weight: 600;
}

/* Footer */
footer {
  background: #0f172a;
  color: #94a3b8;
  padding: 3rem 1rem;
  text-align: center;
  font-size: 0.9rem;
  margin-top: 3rem;
}

/* Responsive */
@media (max-width: 768px) {
  .nav-container {
    flex-direction: column;
    gap: 1rem;
    padding: 1rem;
  }

  .nav-links {
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.5rem;
  }

  .nav-links a {
    font-size: 0.85rem;
    padding: 0.4rem 0.6rem;
  }

  .hero {
    padding: 4rem 1rem;
  }

  .hero-title {
    font-size: 2rem;
  }

  .info-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  section {
    padding: 1.5rem;
  }
}

/* Utilities */
.d-flex {
  display: flex;
  flex-wrap: wrap;
}

.justify-content-center {
  justify-content: center;
}

.gap-2 {
  gap: 1rem;
}