/* roulang page: index */
:root {
      --primary: #00E575;
      --secondary: #00C896;
      --accent: #FF6B00;
      --dark-bg: #0B0E14;
      --card-bg: #18202C;
      --text-main: #FFFFFF;
      --text-muted: #8E9AA8;
      --light-bg: #F4F6F9;
    }
    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    }
    body {
      background-color: var(--dark-bg);
      color: #E2E8F0;
      overflow-x: hidden;
    }
    .scroll-mt-header {
      scroll-margin-top: 5.5rem;
    }
    .neon-border {
      border: 1px solid rgba(0, 229, 117, 0.25);
      transition: all 0.3s ease;
    }
    .neon-border:hover {
      border-color: rgba(0, 229, 117, 0.8);
      box-shadow: 0 8px 30px -4px rgba(0, 229, 117, 0.25);
      transform: translateY(-3px);
    }
    .glass-nav {
      background: rgba(11, 14, 20, 0.88);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }
    .glow-btn {
      background: linear-gradient(135deg, #00E575 0%, #00C896 100%);
      box-shadow: 0 4px 18px rgba(0, 229, 117, 0.35);
      transition: all 0.25s ease;
    }
    .glow-btn:hover {
      transform: scale(1.02);
      box-shadow: 0 8px 26px rgba(0, 229, 117, 0.55);
    }
    .accordion-content {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .accordion-item.active .accordion-content {
      max-height: 200px;
    }
    .accordion-item.active .accordion-icon {
      transform: rotate(180deg);
    }