/* roulang page: index */
:root {
      --brand-dark: #0F172A;
      --brand-primary: #0EA5E9;
      --brand-emerald: #10B981;
      --brand-accent: #F97316;
      --brand-bg: #F8FAFC;
      --card-border: rgba(226, 232, 240, 0.8);
      --card-shadow: 0 20px 30px -10px rgba(15, 23, 42, 0.06);
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
      background-color: var(--brand-bg);
      color: #334155;
      overflow-x: hidden;
    }
    .hero-glow {
      background: radial-gradient(circle at 50% 20%, rgba(14, 165, 233, 0.12) 0%, rgba(248, 250, 252, 0) 70%);
    }
    .card-hover-effect {
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .card-hover-effect:hover {
      transform: translateY(-6px);
      box-shadow: 0 25px 35px -10px rgba(14, 165, 233, 0.12);
      border-color: rgba(14, 165, 233, 0.35);
    }
    .accordion-content {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease-out;
    }
    .accordion-content.active {
      max-height: 240px;
    }
    .radar-grid {
      background-size: 24px 24px;
      background-image: linear-gradient(to right, rgba(255, 255, 255, 0.05) 1px, transparent 1px),
                        linear-gradient(to bottom, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
    }
    .pulse-dot {
      animation: pulseAnimation 2s infinite cubic-bezier(0.4, 0, 0.6, 1);
    }
    @keyframes pulseAnimation {
      0%, 100% { opacity: 1; transform: scale(1); }
      50% { opacity: 0.4; transform: scale(1.2); }
    }