:root {
    --paper: #f2f2f2;
    --ink: #1a1a1a;
}

* {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
    background: var(--paper);
    color: var(--ink);
}

body {
    font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
    font-weight: 400;
    font-size: 16.5px;
    line-height: 1.5;
}

.layout {
    display: flex;
    align-items: flex-start;
    padding: 3rem;
    gap: 7rem;
}

nav {
    flex: 0 0 160px;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

nav a {
    color: var(--ink);
    text-decoration: none;
}

nav .brand {
    margin-bottom: 2rem;
}

.sub-nav {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    padding-left: 1rem;
}

.content {
    flex: 1 1 auto;
    max-width: 750px;
}

p {
    margin: 0 0 1em 0;
}

h1, h2 {
    font-size: 1em;
    font-weight: 700;
    margin: 0 0 1em 0;
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: 1em;
}

.page-header h1 {
    margin: 0;
}

a {
    color: var(--ink);
    text-decoration: none;
}

a:hover {
    background-color: #ffe600;
}

nav a.active {
    background-color: #ffe600;
}

.content a {
    text-decoration: underline;
}

em, i {
    font-style: italic;
}

ul {
    margin: 0 0 1em 0;
    padding: 0;
    list-style: none;
}

li {
    margin: 0 0 0.4em 0;
}

.two-col {
    columns: 2;
    column-gap: 2rem;
}

.list-row {
    display: grid;
    grid-template-columns: repeat(3, max-content);
    justify-content: space-between;
    gap: 3.5rem;
    margin-bottom: 1em;
}

.gallery {
    columns: 3;
    column-gap: 0.75rem;
    column-fill: auto;
    margin-bottom: 1em;
}

.gallery a {
    display: block;
    break-inside: avoid;
}

.gallery img {
    width: 100%;
    display: block;
    margin-bottom: 0.75rem;
}

.gallery.js-masonry {
    columns: unset;
    display: flex;
    gap: 0.75rem;
}

.gallery-column {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    min-width: 0;
}

.gallery-column a {
    display: block;
}

.gallery-column img {
    width: 100%;
    display: block;
    margin-bottom: 0;
}

.lightbox {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.lightbox:target {
    display: flex;
}

.lightbox img {
    max-width: 90%;
    max-height: 90%;
}

.lightbox-close {
    position: absolute;
    top: 1.5rem;
    right: 2rem;
    color: #f2f2f2;
    font-size: 2.5rem;
    text-decoration: none;
    line-height: 1;
}

@media (max-width: 900px) {
    .gallery {
        columns: 2;
    }
}

@media (max-width: 640px) {
    body {
        font-size: 16px;
    }
    .layout {
        flex-direction: column;
        padding: 1.5rem;
        gap: 2rem;
    }
    nav {
        flex: none;
        width: 100%;
    }
    .content {
        max-width: 100%;
    }
    .gallery {
        columns: 1;
    }
}