.nav-link {
        position: relative;
        padding-bottom: 4px;
        overflow: hidden;
    }
    .nav-link::after {
        content: '';
        position: absolute;
        width: 100%;
        height: 2px;
        background-color: #38bdf8;
        bottom: 0;
        left: -100%;
        transition: left 0.3s ease-in-out;
    }
    .nav-link:hover::after {
        left: 0;
    }
    .nav-link:hover {
        color: #38bdf8;
        transform: translateY(-1px);
    }
    .nav-link.active {
        color: #f59e0b;
        font-weight: 600;
    }
    .nav-link.active::after {
        left: 0;
        background-color: #f59e0b;
    }
    /* Enhanced navbar */
    #navbar {
        backdrop-filter: blur(10px);
        -webkit-backdrop-filter: blur(10px);
        background: rgba(17, 24, 39, 0.8);
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        transition: all 0.3s ease;
    }
    #navbar.scrolled {
        background: rgba(17, 24, 39, 0.95);
        box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    }
    .navbar-logo {
        background: linear-gradient(135deg, #06b6d4, #f59e0b);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
        font-weight: 800;
        letter-spacing: 1px;
    }
    .mobile-menu-btn {
        transition: all 0.3s ease;
    }
    .mobile-menu-btn:hover {
        transform: scale(1.1);
    }
    .mobile-menu-btn.active {
        transform: rotate(90deg);
    }
    /* Ensure anchor scroll and sections don't hide behind navbar */
    section { scroll-margin-top: 6rem; }
    .header-text {
        font-size: 2rem;
        font-weight: bold;
        color: #38bdf8;
        text-align: center;
        height: 50px;
        overflow: hidden;
        position: relative;
    }
    /* Style de la navbar fixée avec fond blanc */
    .navbar-fixed {
        background-color: white;
        box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
        transition: background-color 0.3s ease, box-shadow 0.3s ease;
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        z-index: 1000;
    }

    .loading-overlay {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background-color: rgba(0, 0, 0, 0.8);
        display: flex;
        justify-content: center;
        align-items: center;
        z-index: 10000;
    }
    .loading-text {
        font-size: 2rem;
        color: #38bdf8;
        font-weight: bold;
    }