/* roulang page: index */
:root {
      --primary: #0284c7;
      --secondary: #059669;
      --accent: #ea580c;
      --bg-light: #f8fafc;
      --text-main: #0f172a;
      --text-muted: #334155;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
      color: var(--text-main);
      background-color: var(--bg-light);
      -webkit-font-smoothing: antialiased;
    }
    .hero-banner-bg {
      background-image: linear-gradient(135deg, rgba(15, 23, 42, 0.88), rgba(2, 132, 199, 0.85)), url('/assets/images/4707936f89b0140b.jpg');
      background-size: cover;
      background-position: center;
    }
    .dark-board-bg {
      background-image: linear-gradient(180deg, rgba(15, 23, 42, 0.95), rgba(30, 41, 59, 0.98)), url('/assets/images/1b796d2d46a1b709.webp');
      background-size: cover;
      background-position: center;
    }
    details summary::-webkit-details-marker {
      display: none;
    }