/* Header */
#site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    max-width: 100%;
    height: var(--header-height);
    z-index: 1000;
    display: block;
    padding: 0;
    margin: 0;
    overflow: visible;
    background-color: var(--secondary-background);
    box-shadow: var(--subtle-shadow);
}

/* Home button */
.home-button {
    position: absolute;
    top: 50%;
    left: 2%;
    transform: translateY(-50%);
    height: 60%;
    aspect-ratio: 4/1;
    -webkit-mask-image: url('../images/EoSApplications_Grey.PNG');
    mask-image: url('../images/EoSApplications_Grey.PNG');
    -webkit-mask-repeat: no-repeat;
    mask-repeat: no-repeat;
    -webkit-mask-position: left center;
    mask-position: left center;
    -webkit-mask-size: contain;
    mask-size: contain;
    background-color: var(--secondary-text);
    border: none;
    cursor: pointer;
    transition: transform 0.25s ease-in-out;
}
.home-button:hover {
    background-color: var(--primary-accent);
    transform: translateY(-50%) scale(1.05);
}

/* Menu toggle button */
#menu-toggle {
    position: absolute;
    top: 50%;
    right: calc(2% + 6vh);
    transform: translateY(-50%);
    height: 50%;
    aspect-ratio: 1/1;
    -webkit-mask-image: url('../images/Menu_Bars.PNG');
    mask-image: url('../images/Menu_Bars.PNG');
    -webkit-mask-repeat: no-repeat;
    mask-repeat: no-repeat;
    -webkit-mask-position: center;
    mask-position: center;
    -webkit-mask-size: contain;
    mask-size: contain;
    background-color: var(--secondary-text);
    border: none;
    cursor: pointer;
    transition: transform 0.25s ease-in-out;
}
#menu-toggle:hover {
    background-color: var(--primary-accent);
    transform: translateY(-50%) scale(1.1);
}

/* Collapsible navigation menu — styled like the app's QComboBox#Dropdown
   popup (see Dropdowns.qss / .eosholo-dropdown-list): Quaternary_Background
   panel, rounded items, Primary_Color/Primary_Background on hover. */
.menu {
    display: none;
    position: absolute;
    z-index: 1000;
    list-style: none;
    margin: 0;
    padding: 4px 8px;
    border-radius: var(--corner-rounding);
    background-color: var(--quaternary-background);
    box-shadow: var(--medium-shadow);
    max-width: 600px;
}
.menu.visible {
    display: block;
}
.menu li {
    position: relative;
    margin: 0;
    list-style: none;
}
.menu li a {
    text-decoration: none;
    display: block;
    padding: 0.5rem 1rem;
    margin: 4px 0;
    border-radius: var(--corner-rounding);
    color: var(--quaternary-text);
    font-size: 1rem;
    transition: background-color 0.15s ease-in-out, color 0.15s ease-in-out;
}
.menu li a:hover {
    background-color: var(--primary-color);
    color: var(--primary-background);
}

/* Light/dark mode toggle button */
#theme-toggle {
    position: absolute;
    top: 50%;
    right: 2%;
    transform: translateY(-50%);
    height: 50%;
    aspect-ratio: 1/1;
    -webkit-mask-image: url('../images/LightDark_Mode.PNG');
    mask-image: url('../images/LightDark_Mode.PNG');
    -webkit-mask-repeat: no-repeat;
    mask-repeat: no-repeat;
    -webkit-mask-position: center;
    mask-position: center;
    -webkit-mask-size: contain;
    mask-size: contain;
    background-color: var(--secondary-text);
    border: none;
    cursor: pointer;
    transition: transform 0.25s ease-in-out;
}
#theme-toggle:hover {
    background-color: var(--primary-accent);
    transform: translateY(-50%) scale(1.1);
}