/* VARIABLES */
:root {
    --main-bg-color: #edf3f3;
    --image-border: 0.4em solid #fff;
}

/* DEFAULTS */

html, body, div, span, h1, h2, h3, h4, h5, h6, p, ul, ol, li, dl, dt, dd, img, fieldset, form, label, legend, table, caption, tbody, tfoot, thead, tr, th, td, a, article, aside, details, figcaption, figure, footer, header, hgroup, main, menu, nav, section {
    /* Cancel out some differences between browser defaults */
    margin: 0;
    padding: 0;
    border: 0;
    font: inherit;
    vertical-align: baseline;
}

/* Apply a natural box layout model to all elements, but allowing components to change it.
 */
html {
	box-sizing: border-box;
}

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

ul {
	list-style-position: inside;
}

nav ul {
	list-style-type: none;
}


/* COLOUR SCHEME */

body {
    background-color: var(--main-bg-color);
    color: #222;
}

a {
    color: #222;
}

#main-menu {
    background-color: #566666;
}

#main-menu a {
    color: #fff;
}

/* Lightbox overrides */

.goverlay {
    background-color: #fff !important;
}

.glightbox-clean .gclose, .glightbox-clean .gnext, .glightbox-clean .gprev {
    background-color: rgba(0,0,0,.8) !important;
}

.glightbox-clean .gclose {
    opacity: 1 !important;
}

.glightbox-clean .gslide-title {
    font-family: "Montserrat", "Helvetica Neue", "Lucida Grande", Arial, sans-serif !important;
    font-weight: 400 !important;
}

.glightbox-container {
    padding-top: 1em !important;
}


/* TYPOGRAPHY */

html {
    /* font-size: 112.5%; */ /* 1.125 x 16 --> 18 */
}

body {
    line-height: 1.5;
    font-family: "Montserrat", "Helvetica Neue", "Lucida Grande", Arial, sans-serif;
    font-weight: 400;
}

footer {
    text-align: right;
}

h1, h2 { 
    font-weight: 500;
}

h1 {
    margin: 4em 0 0 0;
    font-size: 1.33333333rem; /* 1 1/3 x 18 --> 24 */
}  

main h1 {
    margin-bottom: 1em;
}

h2 {
	font-size: 1.25rem;
    font-weight: 500;
    margin: 2em 0 1em 0;
}

p { 
    margin: 0 0 1em 0; 
}

.name {
    margin-bottom: 0;
}

#tagline {
    font-size: 2rem;
    font-weight: 500;
    margin: 1em 0;
}

.exhibition .description {
    margin-top: 2em;
}

#ArtworkMenuPage .name {
    font-style: italic;
}

#ArtworkMenuPage .media {
    font-style: normal;
}

/* IMAGES */

img {
	margin: 0;
	width: 100%;
    height: auto;
    vertical-align: bottom;
}

#logo {
    width: 18em;
}

#social-media img {
    width: 2.5rem;
}

#ArtworkMenuPage .artwork img.sold {
    margin: 0 0.5em 0 0;
    vertical-align: middle;
}


/* MOBILE MENU */

#main-menu {
    height: 100%;
    width: 0;
    max-width: 22em;
    position: fixed;
    z-index: 10;
    top: 0;
    left: 0;
    overflow-x: hidden; /* Disable horizontal scroll */
    padding-top: 6rem;
    transition: 0.3s; /* Transition effect to slide in the sidenav */

    &.menu-open {
        width: 100%;
    }

    & ul {
        white-space: nowrap;
    }

    & li {
        line-height: 1.2;
        padding: 0.8em 2em;
        text-align: left;
    }

    & li a {
        text-decoration: none;
        text-transform: uppercase;
    }
}

#menu-open-button, #menu-close-button {
    display: block;
    width: 1em;
    cursor: pointer;
    line-height: 1;
}

#menu-open-button {
    font-size: 2rem;
    color: #222;
    margin-bottom: 1em;
}

#menu-close-button {
    position: absolute;
    top: 2rem;
    right: 1rem;
    font-size: 2rem;
    color: #fff;
}


/* DEFAULT LAYOUT - SINGLE COLUMN */

body {
    max-width: 32rem;
    margin: 0 auto;
}

header, main {
    padding: 2em 1em;
}

header {
    text-align: center;
}

footer {
    padding: 1em;
}

#main-image {
    & img {
        border: var(--image-border);
    }
}

#featured-artworks {
    & #artworks {
        & img {
            border: var(--image-border);
        };
        & .artwork-name {
            text-align: center;
            margin-top: 0.5em;
        }
    }
}

#ArtworkMenuPage {
    & .artwork {
        margin-bottom: 2em;
    }

    & .artwork img {
        margin-bottom: 1em;
        border: var(--image-border);
    }
}

#ExhibitionMenuPage {
    & .exhibition {
        margin-bottom: 4em;
    }
}

#social-media > a {
    margin-right: 1em;
}

/* MEDIUM LAYOUT */

@media screen and (min-width: 40em) {

    body {
        max-width: 100%;
        display: grid;
        grid-template-columns: 1fr 90% 1fr;
        grid-template-areas: ". header ."
                             ". main ."
                             ". footer .";
    }
    header {
        grid-area: header;
        padding: 2em 0;
    }
    
    #menu-open-button, #menu-close-button {
        margin-bottom: 2em;
    }
    
    main {
        grid-area: main;
        padding: 4em 0 2em 0;
    }
    
    footer {
        grid-area: footer;
        padding: 2em 0;
    }
    
    #ArtworkMenuPage {
        & #artworks {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 4em;
        }
        
        & .artwork {
            margin-bottom: 0;
        }
    }

}


/* LARGE LAYOUT */

@media screen and (min-width: 52em) {

/*    body {
        max-width: 100%;
        display: grid;
        grid-template-columns: 1fr 90% 1fr;
        grid-template-areas: ". header ."
                             ". main ."
                             ". footer .";
    }
   
    header {
        grid-area: header;
        padding: 2em 0;
    }
    
    #menu-open-button, #menu-close-button {
        margin-bottom: 2em;
    }
    
    main {
        grid-area: main;
        padding: 4em 0 2em 0;
    }
    
    footer {
        grid-area: footer;
        padding: 2em 0;
    }
*/
    
    #page-head {
        display: flex;
        gap: 4em;
        & > * {
            flex-basis: 0;
            flex-grow: 1;
        };
    }
    
    #featured-artworks {
        & #artworks {
            display: flex;
            gap: 4em;
            & > div {
                flex-basis: 0;
                flex-grow: 1;
            }
        }
    }
        
    #content {
            width: 40em;
            margin: 2em auto;
    }
    
    #ArtworkMenuPage {
        & #artworks {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 4em;
        }
        
        & .artwork {
            margin-bottom: 0;
        }
    }
    
    #ExhibitionMenuPage main .exhibition {
		width: 32em;
		margin: 0 auto 12em auto;
    }
    
    /* Typography */
    
    h2 {
        font-size: 2rem;
        text-align: center;
    }
    
    /* Main Menu */
    
    #main-menu {
        position: static;
        width: 100%;
        max-width: 100%;
        height: auto;
        overflow-x: visible;
        padding-top: 2em;
        background-color: var(--main-bg-color);
    
        & > ul {
            display: flex;
            justify-content: center;
            align-items: center;
            height: 100%;
            margin: 0;
            padding: 0;
            border-top: 0;
        }
        
        & li {
            line-height: 1;
        }
        
        & a {
            color: #333;
            margin: 0 1em;
            padding: 0;
        }

        & a:hover, li.current, a.section { 
            background-color: transparent;
        }
        
        & li > a {
            /* Border in same colour as background prevents jumping of menu items on hover */
            border-bottom: 1px solid var(--main-bg-color);
            padding-bottom: 0.1em;
        }
        
        & li.current > a, li > a:hover {
            border-bottom: 1px solid #333;	
        }
    }
    
    #menu-open-button, #menu-close-button {
        display: none;
    }
    
}

/* VERY LARGE LAYOUT */

@media screen and (min-width: 72em) {

    #tagline {
        font-size: 2.5rem;
    }
    
}