* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: Arial, Helvetica, sans-serif;
        }

        body {
            background-color: #000;
            color: #fff;
            height: 100vh;
            display: flex;
            flex-direction: column;
        }

        header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 30px;
            border-bottom: 1px solid #222;
        }

        .brand {
            display: flex;
            align-items: center;
            gap: 15px;
        }

        .brand img {
            width: 45px;
        }

        nav {
            position: relative;
        }

        nav ul {
            list-style: none;
            display: flex;
            gap: 25px;
        }

        nav a {
            color: #fff;
            text-decoration: none;
            cursor: pointer;
        }

        nav a:hover {
            color: #aaa;
        }

        /* BOTÓN HAMBURGUESA */
        .menu-toggle {
            display: none;
            font-size: 28px;
            cursor: pointer;
        }

        main {
            flex: 1;
            overflow-y: auto;
        }

        footer {
            border-top: 1px solid #222;
            text-align: center;
            padding: 15px;
            color: #aaa;
        }

        /* RESPONSIVE */
        @media (max-width: 768px) {

            nav ul {
                display: none;
                flex-direction: column;
                background-color: #000;
                position: absolute;
                top: 45px;
                right: 0;
                width: 200px;
                border: 1px solid #222;
            }

            nav ul.active {
                display: flex;
            }

            nav ul li {
                padding: 12px;
                border-bottom: 1px solid #222;
            }

            .menu-toggle {
                display: block;
            }
        }