/* roulang page: index */
:root {
      --deep-space: #0b0d17;
      --cosmic-navy: #161b2a;
      --star-gold: #f0b90b;
      --stardust: #c0caf5;
      --nebula: #7a5af5;
      --soft-white: #e0e6ff;
      --border-dim: rgba(255, 255, 255, 0.08);
      --card-bg: rgba(20, 25, 45, 0.8);
      --card-border: rgba(255, 255, 255, 0.1);
      --radius-md: 1rem;
      --radius-lg: 1.5rem;
      --shadow-glow: 0 8px 32px rgba(122, 90, 245, 0.25);
      --shadow-card: 0 20px 40px -15px rgba(0,0,0,0.6);
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    body {
      background-color: var(--deep-space);
      color: var(--stardust);
      font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
      line-height: 1.6;
      background-image: radial-gradient(ellipse at 40% 30%, rgba(122, 90, 245, 0.1) 0%, transparent 60%),
                        radial-gradient(ellipse at 70% 70%, rgba(240, 185, 11, 0.06) 0%, transparent 55%);
      background-attachment: fixed;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: 0.25s ease;
    }

    img {
      max-width: 100%;
      display: block;
      object-fit: cover;
    }

    button, input {
      font-family: inherit;
    }

    .glass-card {
      background: rgba(15, 20, 35, 0.7);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      border: 1px solid var(--card-border);
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-card);
    }

    .hover-lift {
      transition: transform 0.3s ease, box-shadow 0.3s ease;
    }
    .hover-lift:hover {
      transform: translateY(-6px);
      box-shadow: 0 25px 40px -12px rgba(122,90,245,0.5);
      border-color: rgba(122,90,245,0.5);
    }

    .gradient-text {
      background: linear-gradient(135deg, #f0b90b 0%, #c084fc 60%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    .btn-primary {
      background: linear-gradient(135deg, #7a5af5, #4f3eb0);
      border: none;
      padding: 0.8rem 2rem;
      border-radius: 3rem;
      color: white;
      font-weight: 600;
      letter-spacing: 0.5px;
      box-shadow: 0 8px 22px rgba(122,90,245,0.5);
      transition: all 0.25s;
      display: inline-flex;
      align-items: center;
      gap: 0.5rem;
    }
    .btn-primary:hover {
      background: linear-gradient(135deg, #8f6eff, #5b48c5);
      box-shadow: 0 12px 28px rgba(122,90,245,0.7);
      transform: scale(1.03);
    }

    .section-tag {
      background: rgba(122,90,245,0.2);
      color: #c4b5fd;
      border-radius: 3rem;
      padding: 0.25rem 1.2rem;
      font-weight: 600;
      font-size: 0.8rem;
      letter-spacing: 0.3px;
      display: inline-block;
      border: 1px solid rgba(192, 138, 255, 0.3);
    }

    .nav-card-panel {
      background: rgba(12, 16, 30, 0.85);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border: 1px solid rgba(255,255,255,0.1);
      border-radius: 5rem;
      padding: 0.5rem 1.5rem;
      display: flex;
      align-items: center;
      justify-content: space-between;
      box-shadow: 0 12px 35px rgba(0,0,0,0.7);
    }

    @media (max-width: 768px) {
      .nav-card-panel {
        flex-wrap: wrap;
        border-radius: 2.5rem;
        padding: 1rem;
      }
    }