/* Header */
        header {
            background-color: white;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
            position: fixed;
            width: 100%;
            top: 0;
            z-index: 1000;
        }

        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
        }

        .logo {
            display: flex;
            align-items: center;
        }

        .logo h1 {
            font-size: 1.8rem;
            color: var(--azul-petroleo);
            font-weight: 700;
        }

        .logo span {
            color: var(--marrom-madeira);
        }

        nav ul {
            display: flex;
            list-style: none;
        }

        nav ul li {
            margin-left: 30px;
        }

        nav ul li a {
            text-decoration: none;
            color: var(--azul-petroleo);
            font-weight: 600;
            font-size: 1rem;
            transition: color 0.3s ease;
            position: relative;
        }

        nav ul li a:hover {
            color: var(--marrom-madeira);
        }

        nav ul li a::after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--marrom-madeira);
            transition: width 0.3s ease;
        }

        nav ul li a:hover::after {
            width: 100%;
        }

        .mobile-menu {
            display: none;
            font-size: 1.5rem;
            cursor: pointer;
            color: var(--azul-petroleo);
        }