:root {
    --bg-pagina: 45, 45, 45;
    --bg-navbar-primario: 30, 30, 30;
    --bg-navbar-secondario: 35, 35, 35;
    --colore-primario: 80, 180, 45;
    --colore-primario-hover: 70, 140, 45;
    --altezza-menu: 64px;
    --max-width-contenuto: 900px;
    --padding: 32px;
    --spessore-testo: 500;
}

*, *::before, *::after {
    box-sizing: border-box;
}

body {
    margin: 0;
    padding: 0;
    background-color: rgb(var(--bg-pagina));
    font-family:'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: white;
}

.spazio-menu {
    height: calc(var(--altezza-menu) + var(--padding));
}

/* Contenitore principale del menu */
.menu {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--altezza-menu);
    background-color: rgb(var(--bg-navbar-primario));
    box-shadow: 0 4px 4px rgb(var(--bg-navbar-primario));
}

.menu .contenuto-menu {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: var(--max-width-contenuto);
    width: 100%;
    height: 100%;
    margin: 0 auto;
    padding-inline: var(--padding);
}

/* Logo */
.menu .contenuto-menu .immagine img {
    height: calc(var(--altezza-menu)*0.6);
    display: block;
}

/* Lista orizzontale */
.menu .contenuto-menu .opzioni ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    gap: 30px;
}

a {
    color: white;
    text-decoration: none;
    font-weight: var(--spessore-testo);
    cursor: pointer;
    transition: 0.1s;
    transition: color 0.3s;
}

a:hover {
    color: rgb(var(--colore-primario));
}

#titolo {
    text-align: center;
}

.menu .hamburger {
    display: none;
    cursor: pointer;
}

button {
    padding: 12px 24px;
    border: none;
    font-size: 16px;
    color: white;
    font-weight: bold;
    background-color: rgb(var(--colore-primario));
    cursor: pointer;
    transition: 0.1s;
    transition: filter 0.3s;
}

button:hover {
    filter: brightness(0.8);
}

button:active {
    transform: scale(0.98);
}

.contenuto {
    max-width: calc(var(--max-width-contenuto) - calc(var(--padding)*2));
    width: calc(100% - calc(var(--padding)*2));
    margin: 0 auto;
    padding: var(--padding);
    background-color: rgb(var(--bg-navbar-secondario));
}

img {
    width: 100%;
}

@media screen and (max-width: 600px) {
    :root {
        --altezza-menu: 56px;
        --padding: 16px;
    }
    
    .menu .contenuto-menu .opzioni ul {
        display: none;
        flex-direction: column;
        position: absolute;
        top: var(--altezza-menu);
        right: 0;
        background-color: rgb(var(--bg-navbar-primario));
        box-shadow: 0 4px 4px rgb(var(--bg-navbar-primario));
        width: 100%;
        padding: 16px 0;
        text-align: center;
        gap: 30px;
        opacity: 0;
        pointer-events: none;
        transform: translateY(-10px);
    }

    /* Quando il menu è attivo */
    .menu .contenuto-menu .opzioni ul.attivo {
        display: flex;
        opacity: 1;
        transform: translateY(0);
        pointer-events: auto;
    }

    .menu .hamburger {
        display: block;
    }

    .menu .hamburger img {
        height: calc(var(--altezza-menu) * 0.4);
        transition: 0.1s;
    }

    .menu .hamburger img:active {
        filter: brightness(0.8);
        transform: scale(0.94);
    }
}