/* Modern info box styling */
.info-box {
  --info-card-radius: 20px;
  --info-header-gradient: var(--primary-gradient);
  --info-header-accent: var(--primary-color);
  max-width: 900px;
  margin: 0 auto;
  background: var(--bg-white);
  border-radius: var(--info-card-radius);
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--border-light);
  overflow: hidden;
  position: relative;
}

.info-box::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--info-header-gradient);
  border-top-left-radius: var(--info-card-radius);
  border-top-right-radius: var(--info-card-radius);
}

.info-box-header {
  color: white;
  padding: 2rem;
  text-align: center;
  position: relative;
  border-top-left-radius: var(--info-card-radius);
  border-top-right-radius: var(--info-card-radius);
  isolation: isolate;
}

.info-box-header::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--info-header-gradient);
  border-top-left-radius: inherit;
  border-top-right-radius: inherit;
  z-index: -1;
}

.info-box-header::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 0;
  border-left: 15px solid transparent;
  border-right: 15px solid transparent;
  border-top: 10px solid var(--info-header-accent);
}

.info-box-header h1,
.info-box-header h2 {
  margin: 0;
  font-size: 2.25rem;
  font-weight: 700;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  font-family: 'Kaisei Opti', serif;
}

.info-box-header .subtitle {
  margin-top: 0.5rem;
  font-size: 1.1rem;
  opacity: 0.9;
  font-weight: 300;
}

.info-box-content {
  padding: 3rem 2.5rem;
  text-align: left;
  line-height: 1.8;
  color: var(--text-dark);
}

.info-box-content h3 {
  color: var(--primary-color);
  font-size: 1.5rem;
  font-weight: 600;
  margin: 2rem 0 1rem 0;
  padding-left: 1rem;
  border-left: 4px solid var(--primary-color);
  font-family: 'Kaisei Opti', serif;
}

.info-box-content h4 {
  color: var(--text-dark);
  font-size: 1.25rem;
  font-weight: 600;
  margin: 1.5rem 0 0.75rem 0;
  position: relative;
  padding-left: 1.5rem;
}

.info-box-content h4::before {
  content: '▶';
  position: absolute;
  left: 0;
  color: var(--accent-color);
  font-size: 0.8rem;
}

.info-box-content p {
  margin-bottom: 1.25rem;
  color: var(--text-dark);
  font-size: 1rem;
}

.info-box-content ul, .info-box-content ol {
  margin: 1rem 0 1.5rem 1.5rem;
  color: var(--text-dark);
}

.info-box-content li {
  margin-bottom: 0.75rem;
  line-height: 1.7;
}

.info-box-content li strong {
  color: var(--text-dark);
  font-weight: 600;
}

.info-box-content a {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 500;
  transition: all 0.2s ease;
  border-bottom: 1px solid transparent;
}

.info-box-content a:hover {
  color: var(--accent-color);
  border-bottom-color: var(--accent-color);
}

.info-box-content code {
  background: var(--primary-light);
  color: var(--primary-color);
  padding: 0.25rem 0.5rem;
  border-radius: 6px;
  font-family: 'Courier New', monospace;
  font-size: 0.9rem;
  font-weight: 500;
}

/* Contact form styling */
.contact-form-link {
  display: inline-flex;
  align-items: center;
  background: var(--primary-action-gradient, linear-gradient(135deg, #1e40af 0%, #2563eb 100%));
  color: white;
  padding: 1rem 2rem;
  border-radius: 50px;
  text-decoration: none;
  font-weight: 600;
  font-size: 1.1rem;
  transition: all 0.3s ease;
  box-shadow: var(--shadow-md);
  margin-top: 1rem;
}

.contact-form-link:hover {
  background: var(--primary-action-gradient-hover, linear-gradient(135deg, #1e3a8a 0%, #1d4ed8 100%));
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  color: white;
  text-decoration: none;
}

.contact-form-link::after {
  content: '→';
  margin-left: 0.5rem;
  transition: transform 0.3s ease;
}

.contact-form-link:hover::after {
  transform: translateX(4px);
}

/*
 * .info-box-content a の方が詳細度が高く、ボタン上の文字色が
 * リンク色(濃いティール)に上書きされて背景と同化してしまうため、
 * ボタン内は白文字・下線なしを明示的に維持して視認性を確保する。
 */
.info-box-content .contact-form-link,
.info-box-content .contact-form-link:hover,
.info-box-content .modern-btn,
.info-box-content .modern-btn:hover,
.info-box-content .modern-btn-success,
.info-box-content .modern-btn-success:hover {
  color: #ffffff !important;
  text-decoration: none !important;
  border-bottom: none !important;
}

/* Responsive design */
@media (max-width: 767.98px) {
  .info-page {
    padding: 1rem 0.5rem;
  }

  .info-box {
    --info-card-radius: 16px;
    border-radius: var(--info-card-radius);
  }

  .info-box-header {
    padding: 1.5rem 1rem;
  }
  
  .info-box-header h1,
  .info-box-header h2 {
    font-size: 1.8rem;
  }
  
  .info-box-content {
    padding: 2rem 1.5rem;
  }
  
  .info-box-content h3 {
    font-size: 1.3rem;
  }
  
  .info-box-content h4 {
    font-size: 1.1rem;
  }
}