/* --- Variables & Fluid Logic --- */
:root {
    --font-sans: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
    --font-serif: 'Garamond Regular', serif;

    /* --- Universal Static Fallbacks --- */
    /* Every browser in the world understands these. */
    --fluid-serif: 1.6rem;
    --fluid-serif-sm: 1.4rem;
    --site-name-size: 2.2rem;
    --header-padding: 5rem;
    --min-gutter: 2rem;
    --side-gutter: 5%; 
    --dynamic-main-top: 15rem;
    --live-padding-top: 5rem;
    --live-padding-bottom: 1rem;
    --live-font-size: 2.2rem;
    --live-hamburger: 1;
    --scroll-progress: 0;
}

/* Only use max() if the browser explicitly supports it ----- NEW */
@supports (font-size: clamp(1rem, 1vw, 2rem)) and (padding: max(0px)) {
    :root {
    --fluid-serif: clamp(1.5rem, 0.31vw + 1.38rem, 1.7rem);
    --fluid-serif-sm: calc(var(--fluid-serif) * 0.9);
    --site-name-size: clamp(2rem, 0.77vw + 1.71rem, 2.5rem);
    --header-padding: clamp(4rem, 4.6vw + 2.25rem, 7rem);
    --dynamic-main-top: calc((var(--header-padding) * 2) + var(--site-name-size) + 2rem);
    --side-gutter: max(var(--min-gutter), (100vw - 900px) / 2);
    --min-gutter: clamp(1.85rem, 8vw - 1rem, 6rem);
    --scroll-progress: 0;
    --live-padding-top: calc(var(--header-padding) - ((var(--header-padding) - 1rem) * var(--scroll-progress)));
    --live-padding-bottom: max(1rem, calc(var(--header-padding) - ((var(--header-padding) - 1rem) * var(--scroll-progress) * 1.1)));
    --live-font-size: calc(var(--site-name-size) - ((var(--site-name-size) - var(--fluid-serif)) * var(--scroll-progress)));
    --live-hamburger: calc(1 - (0.25 * var(--scroll-progress)));
    }
}

@font-face {
    font-family: 'Garamond Regular';
    src: url(webfonts/AGPRegular.woff2) format(woff2);
    font-display: swap;
}

@font-face {
    font-family: 'Gill Sans';
    src: url(webfonts/GillSans.woff2) format('woff2');
    font-display: swap;
}

/* --- Base Setup --- */
html {
    font-size: 62.5%;
    -webkit-text-size-adjust: 100%;
    -moz-osx-font-smoothing: grayscale;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

body {
    margin: 0;
    padding: 0;
    line-height: 1.5;
    background-color: #fff;
}

/* --- Typography --- */
h1, h2, header, .menu, .nav-link {
    font-family: var(--font-sans);
}

h3, p, .artwork-item, .exhibition-section, .contact-info, footer {
    font-family: var(--font-serif);
    font-size: var(--fluid-serif);
    font-style: normal;
    font-variant-numeric: oldstyle-nums;
}

h1 {
    margin: 0;
    font-weight: 400;
    font-size: 2rem;
}

h2 {
    display: none;
}

h3, .artwork-title {
    font-weight: 700;
}

p {
    font-weight: 400;
    margin-top: 0;
}

a {
    color: #000;
    text-decoration: none;
}

a:hover {
    color: #0044ff;
}

span.garamond-regular-frac { --garamond-regular-frac: "frac" on; }
@supports (font-variant-numeric: diagonal-fractions) {
    .garamond-regular-frac { font-variant-numeric: diagonal-fractions; }
}

/* --- Header Structure --- */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: 0;
    background-color: #fff;
    z-index: 1100;
}

.header-inner {
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--live-padding-top) var(--side-gutter) var(--live-padding-bottom);
    box-sizing: border-box;
    width: 100%;
}

.site-name {
    font-family: var(--font-sans);
    font-size: var(--live-font-size);
    text-transform: uppercase;
    letter-spacing: 0.2rem;
    margin: 0;
}

.header-inner nav {
    display: flex;
    justify-content: flex-end;
}

.hamburger {
    display: block;
    position: relative;
    width: 30px;
    height: 20px;
    cursor: pointer;
    z-index: 1150;
    transform-origin: right center;
            -webkit-transform: scale(var(--live-hamburger));
    transform: scale(var(--live-hamburger));
}

.hamburger::before {
    content: '';
    position: absolute;
    inset: -20px;
}

.hamburger span {
    display: block;
    position: absolute;
    width: 100%;
    height: 2px;
    background: black;
    border-radius: 5px;
    left: 0;
    transition: top 0.2s ease 0.2s, transform 0.2s ease, opacity 0.2s;
}

.hamburger span:nth-child(1) {
    top: 0;
}

.hamburger span:nth-child(2) {
    top: 8.5px;
}

.hamburger span:nth-child(3) {
    top: 17px;
}

/* Hamburger Animation */
.menu-toggle:checked ~ header .hamburger span {
    transition: top 0.2s ease, transform 0.2s ease 0.2s, opacity 0.2s;
}

.menu-toggle:checked ~ header .hamburger span:nth-child(1) {
    top: 10px;
    transform: rotate(45deg);
}

.menu-toggle:checked ~ header .hamburger span:nth-child(2) {
    opacity: 0;
    transform: scale(0);
}

.menu-toggle:checked ~ header .hamburger span:nth-child(3) {
    top: 10px;
    transform: rotate(-45deg);
}

/* --- Full Screen Menu --- */
.menu-toggle { 
    display: none;
}

.menu {
    position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
    inset: 0;
    background: white;
    display: flex;
        flex-direction: column; 
    justify-content: center;
    align-items: center;
        text-align: center;
    text-transform: uppercase;
    letter-spacing: 0.2rem;
    z-index: 1050;
    opacity: 0;
    visibility: hidden;
        -webkit-transition: opacity 0.4s ease;
        -webkit-transition: visibility 0.4s ease;
    transition: opacity 0.4s ease, visibility 0.4s;
}

.menu-toggle:checked ~ .menu {
    opacity: 1;
    visibility: visible;
}

.menu-toggle:checked ~ header .site-name {
    opacity: 0;
    visibility: hidden;
}

.nav {
    display: flex;
    flex-direction: column;
        width: 100%;
    width: 20rem;
    gap: 1rem;
    font-size: 2rem;
    padding: 0;
    list-style: none;
    text-align: center;
}

    /* Fallback for 'gap' which isn't supported in iOS 12 flex */
    .nav > * + * {
    margin-top: 1.5rem;
    }

.nav-link {
    display: block;
    padding: 1rem; 
    transition: var(--transition);
    color: black;
}

.nav-link:hover {
    color: #00ff8b;
}

/* --- Main Content --- */
main {
    display: flex;
    flex-direction: column;
    box-sizing: border-box;
    padding: var(--dynamic-main-top) var(--side-gutter) 8rem;
}

main > * {
    width: 100%;
}

body.home main {
    padding-bottom: 0;
}

.artwork-item {
    width: 100%;
    max-width: 900px;
    margin: 0 auto;
    display: block;
}

img {
    width: 100%;
    height: auto;
    display: block;
}

.artwork-details-block {
    width: 100%;
    padding-bottom: 7rem;
}

.artwork-title {
    padding: 2rem 0 1rem;
}

.artwork-item:last-of-type .artwork-details-block {
    padding-bottom: 4rem; 
}

h3 {
    display: block;
    margin: 3rem 0;
}

.exhibition-row {
        display: flex;
    display: grid;
    grid-template-columns: 15% 85%;
}

.exhibition-year {
        min-width: 15%;
    font-weight: inherit;
}

.exhibition-detail-block {
    display: flex;
    flex-direction: column;
    margin: 0;
}

dl {
    margin: 0;
}

.gallery-name a {
    font-weight: 700;
}

footer {
    width: 100%;
    text-align: center;
    padding: 2rem 0;
}

@media (min-width: 768px) {
    html {
        /* Legacy prefix */
        -webkit-scroll-snap-type: y mandatory;
        scroll-snap-type: y mandatory;
        scroll-behavior: smooth;
        /* Enable smooth momentum scrolling on iOS */
        -webkit-overflow-scrolling: touch;
    }

    .header-inner {
            padding-left: var(--side-gutter);
            padding-right: var(--side-gutter);
        padding: 4rem var(--side-gutter);
            box-sizing: border-box;
    }

    .site-name {
        font-size: var(--site-name-size);
    }

    .hamburger {
        transform: none;
    }

    body.home main {
        padding: 0 var(--side-gutter);
    }
   
    .artwork-item {
        height: 100vh;
        max-width: none; 
        margin: 0;
            -webkit-scroll-snap-align: start;
            scroll-snap-align: start;
            scroll-snap-stop: always;
        display: flex;
        flex-direction: column;
        justify-content: flex-start;
        align-items: center;
        scroll-snap-align: start;
        scroll-snap-stop: always;
        padding: 0; 
        box-sizing: border-box;
    }

    .artwork-item picture {
        display: flex;
        justify-content: center;
        align-items: center;
        height: 75vh;
        width: 100%;
        padding-top: 11.75rem;
    }

    .artwork-item img {
        width: auto;
        height: auto;
        max-width: 100%;
        max-height: 100%;
        object-fit: contain;
    }

    .artwork-details-block {
        display: flex;
        flex: 1;
        flex-direction: column;
        justify-content: center;
        text-align: center;
        width: 100%;
        padding: 0;
    }

    .artwork-title {
        padding: 0 0 1rem;
    }
    
    .artwork-medium, .artwork-size {
        font-size: var(--fluid-serif-sm);
        padding-bottom: 0;
    }

    footer {
        scroll-snap-align: end;
    }
}

@media (min-width: 1024px) {
    html {
        scroll-snap-type: y mandatory;
        scroll-behavior: smooth;
    }

    .header-inner {
        padding: 4rem var(--side-gutter);
    }

    .site-name {
        font-size: var(--site-name-size);
    }

    .hamburger {
        transform: none;
    }

    body.home main {
        padding: 0 var(--side-gutter);
    }
   
    .artwork-item {
        height: 100vh;
        max-width: none; 
        margin: 0;
        display: flex;
        flex-direction: column;
        justify-content: flex-start;
        align-items: center;
        scroll-snap-align: start;
        scroll-snap-stop: always;
        padding: 0; 
        box-sizing: border-box;
    }

    .artwork-item picture {
        display: flex;
        justify-content: center;
        align-items: center;
        height: calc(100vh - 11.5rem * 2);
        width: 100%;
        padding-top: 11.75rem;
    }

    .artwork-item img {
        width: auto;
        height: auto;
        max-width: 100%;
        max-height: 100%;
        object-fit: contain;
    }

    .artwork-details-block {
        flex: 1;
        flex-direction: column;
        justify-content: center;
        text-align: center;
        width: 100%;
        padding: 0; 
    }

    .artwork-title {
        padding: 1rem 0;
    }
        
    .artwork-size {
        padding-bottom: 0;
    }
}