/* roulang page: index */
:root {
      --bg-main: #0A0E17;
      --card-bg: #111827;
      --border-color: #1E293B;
      --text-main: #F8FAFC;
      --text-muted: #94A3B8;
      --accent: #00E599;
      --accent-glow: rgba(0, 229, 153, 0.25);
      --accent-blue: #3B82F6;
    }
    body {
      background-color: var(--bg-main);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      overflow-x: hidden;
    }
    .grid-pattern {
      background-size: 40px 40px;
      background-image: 
        linear-gradient(to right, rgba(30, 41, 59, 0.3) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(30, 41, 59, 0.3) 1px, transparent 1px);
    }
    .border-glow:hover {
      border-color: var(--accent);
      box-shadow: 0 0 25px var(--accent-glow);
    }
    .text-glow {
      text-shadow: 0 0 16px rgba(0, 229, 153, 0.4);
    }
    .accordion-content {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease-out;
    }
    .accordion-item.active .accordion-content {
      max-height: 280px;
    }
    .accordion-item.active .accordion-icon {
      transform: rotate(180deg);
      color: var(--accent);
    }
    .accordion-item.active {
      border-color: var(--accent);
    }