:root {
    --color1: #2c3e50; /* Midnight Blue */
    --color2: #09622e; /* Dark Green */
    --color3: #eaecee; /* Light Steel Gray */
    --roboto: "Open Sans", "Roboto", Arial, sans-serif;
}

/************ HEADER ****************/
header {
    background-color: var(--color1);
    color: white;
    border-bottom: 5px solid var(--color2);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 10px 0;
    width: 100%;
}

.header-container {
    display: grid;
    grid-template-columns: auto 1fr auto; /* logo | span | button */
    align-items: center;
    column-gap: 1rem;
    width: 100%;
    padding: 0 1rem;
    margin: 0 auto;
}

header span {
    font-family: var(--roboto);
    color: #fff;
    font-size: 1.1rem;
    font-weight: bold;
    justify-self: start;
}

.logo img {
    max-width: 85px;
    height: auto;
    border-radius: 6px;
    display: block;
}

/***************** HAMBURGER NAVIGATION *********************/
#humbutton {
    background: none;
    border: none;
    font-size: 2.5rem;
    color: white;
    cursor: pointer;
    justify-self: end;
}

#humbutton::before {
    content: "≡";
}

#humbutton.show::before {
    content: "x";
}

.navigation {
    display: none;
    grid-column: 1 / 4;
    font-family: var(--roboto);
    text-align: left;
    font-size: 1.2rem;
    text-decoration: none;
}

.navigation.show {
    display: block;
}

.navigation ul {
    list-style-type: none;
    margin: 1rem 0 0 0;
    padding: 0;
}

.navigation a {
    display: block;
    padding: 0.9rem 10px;
    text-decoration: none;
    color: #fff;
    text-align: center;
    cursor: pointer;
    transition: background-color 0.4s ease;
}

.navigation li.current a {
    background-color: var(--color3);
    color: var(--color1);
    font-weight: bold;
    border-radius: 10px;
}

.navigation a:hover {
    color: var(--color1);
    background-color: var(--color3);
    border-radius: 10px;
}

@media only screen and (min-width: 962px) {
    .header-container {
        grid-template-columns: auto 1fr auto; /* logo | span | nav */
        max-width: 1530px;
    }

    header span {
        font-size: 1.5rem;
    }

    #humbutton {
        display: none;
    }

    .navigation {
        display: block;
        grid-column: 3/4;
    }
    
    .navigation ul {
        display: flex;
        justify-content: flex-end;
        gap: 5px;
        margin: 0;
    }

    .navigation a {
        padding: 10px 15px;
        border-radius: 6px;
    }
}