:root {
      --primary: #0F172A;
      --accent: #3B82F6;
      --surface: #F8FAFC;
    }
    body { 
      background-color: var(--surface);
      font-family: 'Plus Jakarta Sans', 'Pretendard', sans-serif; 
      line-height: 1.8; 
      color: #1E293B; 
      word-break: keep-all;
    }
    .container-wide { max-width: 1440px; margin: 0 auto; padding: 0 2rem; }
    .glass-nav { background: rgba(255, 255, 255, 0.8); backdrop-filter: blur(20px); border-bottom: 1px solid rgba(0,0,0,0.05); }
    .bento-grid { display: grid; grid-template-columns: repeat(12, 1fr); gap: 1.5rem; }
    .reveal { opacity: 0; transform: translateY(40px); transition: all 1.2s cubic-bezier(0.22, 1, 0.36, 1); }
    .reveal.active { opacity: 1; transform: translateY(0); }
    h1, h2, h3 { font-weight: 800; tracking: -0.04em; }
    /* Additional Custom CSS for smooth scrolling and details summary marker customization */
html {
  scroll-behavior: smooth;
}

details > summary {
  list-style: none;
}
details > summary::-webkit-details-marker {
  display: none;
}
details > summary::after {
  content: '+';
  float: right;
  font-weight: bold;
  color: #3b82f6;
}
details[open] > summary::after {
  content: '-';
}

/* Image hover effects */
.group:hover img {
  transform: scale(1.05);
}