#header {
		transition: background-color 0.2s ease;
		background: linear-gradient(to right, rgba(10, 15, 30, 0.95), rgba(15, 25, 45, 0.95));
 	    border-bottom: 1px solid rgba(15, 25, 45, 0.5);
 	    height: 3em;
		line-height: 3em;
		position: fixed;
		width: 100%;
		z-index: 10;
	}

#header > a {
    transition: opacity 0.2s ease;
    left: 2rem;
    position: absolute;
    color: var(--off-white, #f5f5f5);
    text-decoration: none;
    font-size: 1.3rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
}

#header > a:hover {
    color: var(--bleu-ciel, #6ba5d6);
}

#header.alt {
    background: transparent;
    border-bottom: 1px solid transparent;
}

#header.alt > a {
    pointer-events: none;
    opacity: 0;
}

#header.alt nav {
    pointer-events: none;
    opacity: 0;
}

#header nav {
    position: absolute;
    right: 7rem;
    transition: opacity 0.2s ease;
}

#header nav > ul {
    display: flex;
    gap: 1rem;
}

#header nav > ul > li > a {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.75em;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    text-decoration: none;
    transition: color 0.3s ease;
}

#header nav > ul > li > a:hover {
    color: var(--bleu-ciel, #6ba5d6);
}