:root {
    --blanco: #fff;
    --azul_oscuro: linear-gradient(135deg, #0f141f 0%, #1a2332 100%);
}

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

.menu {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 5%;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
}

.menu::before {
    content: "";
    position: absolute;
    inset: 0;
    background: var(--azul_oscuro);
    opacity: 0;
    transition: opacity 0.5s ease;
    z-index: -1;
}

.menu.scrolled::before {
    opacity: 1;
}

.logo {
    display: flex;
    align-items: center;
    gap: 4px;
    z-index: 20;
    position: relative;
}

.logo img {
    height: 3rem;
    width: auto;
    border-radius: 10px;
}

.logo_titulo {
    font-size: 1.5rem;
    font-weight: bold;
    margin-left: 5px;
    color: var(--blanco);
    font-family: 'Franklin Gothic Medium', 'Arial Narrow', Arial, sans-serif;
    text-shadow: 1px 1px 2px #0f141f;
}

.menu_lista {
    position: static;
    display: flex;
    flex-direction: row;
    gap: 1.5rem;
    list-style: none;
}

.menu_lista a {
    font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
    color: var(--blanco);
    font-weight: bold;
    font-size: 1.3rem;
    text-decoration: none;
    text-shadow: 1px 1px 2px #0f141f;
}

/* icono hamburguesa */
.menu_hamburguesa {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    width: 40px;
    height: 40px;
    position: relative;
    z-index: 1001;
}

.linea {
    position: absolute;
    width: 30px;
    height: 4px;
    background-color: var(--blanco);
    border-radius: 2px;
    transition: all 0.4s ease;
}

.linea1 {
    transform: translateY(-10px);
}

.linea2 {
    transform: translateY(0);
}

.linea3 {
    transform: translateY(10px);
}

#menu_checkbox {
    display: none;
}

#menu_checkbox:checked+.menu_hamburguesa .linea1 {
    transform: rotate(45deg);
}

#menu_checkbox:checked+.menu_hamburguesa .linea2 {
    opacity: 0;
}

#menu_checkbox:checked+.menu_hamburguesa .linea3 {
    transform: rotate(-45deg);
}

/* Menu para móviles */
@media (max-width: 768px) {
    .menu_hamburguesa {
        display: flex;
    }

    .menu_lista {
        position: fixed;
        top: 0;
        left: 0;
        width: 100vw;
        height: 100vh;
        background: var(--azul_oscuro);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 2rem;
        z-index: 100;
        opacity: 0;
        transform: translateY(-20px);
        pointer-events: none;
        transition: opacity 0.3s ease, transform 0.3s ease;
    }

    /* Activación del menú */
    #menu_checkbox:checked~.menu_lista {
        opacity: 1;
        transform: translateY(0);
        pointer-events: auto;
    }

    .menu_lista li {
        width: 100%;
        text-align: center;
    }

    .menu_lista a {
        font-size: 1.5rem;
        padding: 0.5rem 1rem;
        display: block;
    }
}

@media (max-width: 480px) {
    .logo img {
        height: 2.5rem;
    }

    .logo_titulo {
        font-size: 1.3rem;
    }

    .menu_hamburguesa {
        width: 32px;
        height: 32px;
    }

    .linea {
        width: 25px;
        height: 3px;
    }

    .menu_lista a {
        font-size: 1.4rem;
    }
}

@media (max-width: 360px) {
    .menu {
        padding: 15px 3%;
    }

    .logo img {
        height: 2rem;
    }

    .menu_hamburguesa {
        width: 30px;
        height: 30px;
    }

    .linea {
        width: 25px;
        height: 3px;
    }
}