/* roulang page: index */
:root {
      --primary: #1e40af;
      --primary-light: #2563eb;
      --accent: #0d9488;
      --bg-soft: #f8fafc;
      --text-main: #0f172a;
      --text-muted: #475569;
      --border-color: rgba(226, 232, 240, 0.9);
      --card-shadow: 0 4px 20px -4px rgba(30, 58, 138, 0.06);
      --card-shadow-hover: 0 16px 36px -6px rgba(30, 58, 138, 0.14);
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      color: var(--text-main);
      background-color: #ffffff;
      margin: 0;
      padding: 0;
      line-height: 1.6;
    }
    .custom-shadow {
      box-shadow: var(--card-shadow);
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .custom-shadow:hover {
      box-shadow: var(--card-shadow-hover);
      transform: translateY(-3px);
    }
    .dark-card-shadow {
      box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
    }
    .grid-bg {
      background-size: 40px 40px;
      background-image: 
        linear-gradient(to right, rgba(37, 99, 235, 0.05) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(37, 99, 235, 0.05) 1px, transparent 1px);
    }