/* roulang page: index */
:root {
      --primary-color: #4F46E5;
      --accent-cyan: #06B6D4;
      --accent-green: #10B981;
      --bg-dark: #0B0F19;
      --bg-light: #F8FAFC;
      --text-main: #0F172A;
      --text-muted: #64748B;
      --radius-box: 1rem;
      --shadow-soft: 0 10px 30px -5px rgba(0, 0, 0, 0.05);
      --shadow-hover: 0 20px 40px -10px rgba(79, 70, 229, 0.15);
    }
    
    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }
    
    body {
      color: var(--text-main);
      background-color: var(--bg-light);
      -webkit-font-smoothing: antialiased;
    }

    .glass-header {
      background: rgba(11, 15, 25, 0.88);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }

    .hero-glow {
      background: radial-gradient(circle at 50% 30%, rgba(79, 70, 229, 0.25) 0%, rgba(6, 182, 212, 0.1) 45%, rgba(11, 15, 25, 0) 80%);
    }

    .glow-border {
      position: relative;
      border: 1px solid rgba(255, 255, 255, 0.1);
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

    .glow-border:hover {
      border-color: rgba(6, 182, 212, 0.5);
      box-shadow: 0 0 25px rgba(6, 182, 212, 0.2);
      transform: translateY(-4px);
    }

    .card-light {
      background: #FFFFFF;
      border: 1px solid #E2E8F0;
      box-shadow: var(--shadow-soft);
      transition: all 0.3s ease;
    }

    .card-light:hover {
      box-shadow: var(--shadow-hover);
      border-color: #CBD5E1;
      transform: translateY(-3px);
    }

    .btn-pulse {
      animation: pulse-ring 2.5s infinite;
    }

    @keyframes pulse-ring {
      0% { box-shadow: 0 0 0 0 rgba(6, 182, 212, 0.5); }
      70% { box-shadow: 0 0 0 14px rgba(6, 182, 212, 0); }
      100% { box-shadow: 0 0 0 0 rgba(6, 182, 212, 0); }
    }

    .accordion-body {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease, padding 0.35s ease;
    }

    .accordion-item.active .accordion-body {
      max-height: 300px;
    }

    .accordion-item.active .accordion-icon {
      transform: rotate(180deg);
    }