:root {
    --background: #020708;

    --background-navigation: #0E2023;
    --border: #1B3438;

    --title: #F5F6F2;
    --text: #BCC7C8;
    --text-muted: #819396;

    --accent-water: #1AA8A3;
    --accent-sand: #D6BE8A;
}

body {
    background: var(--background);
    color: var(--text);
    font-family: Arial, sans-serif;
    margin: 0;
}

hr {
    border: 0;
    border-top: 1px solid var(--border);
    margin-block: 1.5rem;
}

a {
    color: var(--accent-sand);
}

a:hover {
    color: var(--accent-water);
}

.site-layout {
    align-items: stretch;
    display: grid;
    grid-template-columns:
        minmax(0, 1fr) var(--nav-width) minmax(0, var(--content-width)) minmax(0, 1fr);
    --layout-max-width: 70rem;
    --layout-width: min(var(--layout-max-width), 100vw);
    --nav-width: calc(var(--layout-width) * 2 / 7);
    --content-width: calc(var(--layout-width) - var(--nav-width));
    --page-gutter: max(0px, calc((100vw - var(--layout-max-width)) / 2));
    min-height: 100vh;
}

.site-layout h1 {
    color: var(--title);
    font-size: clamp(2.25rem, 4vw, 3.25rem);
    line-height: 0.90;
    margin: 0;
}

.site-sidebar {
    background: var(--background-navigation);
    display: grid;
    grid-column: 1 / 3;
    grid-template-columns: minmax(0, 1fr) var(--nav-width);
    position: relative;
}

.site-sidebar-inner {
    box-sizing: border-box;
    grid-column: 2;
    margin-block: 0 auto;
    min-width: 0;
    padding: 2rem;
    width: 100%;
}

.site-sidebar header {
    display: grid;
    gap: 1rem;
    padding-top: 3rem;
}

.sidebar-toggle {
    align-items: center;
    background: var(--background-navigation);
    border: 1px solid var(--border);
    border-radius: 0.25rem;
    color: var(--text-muted);
    cursor: pointer;
    display: inline-flex;
    height: 2rem;
    justify-content: center;
    left: calc(var(--page-gutter) + 2rem);
    padding: 0;
    position: absolute;
    top: 0.75rem;
    width: 2rem;
    z-index: 11;
}

.site-layout.is-sidebar-collapsed .sidebar-toggle {
    pointer-events: auto;
}

.sidebar-toggle:hover {
    border-color: var(--accent-sand);
    color: var(--accent-sand);
}

.sidebar-toggle-icon,
.sidebar-toggle-icon::before,
.sidebar-toggle-icon::after {
    background: currentColor;
    content: "";
    display: block;
    height: 1px;
    width: 0.9rem;
}

.sidebar-toggle-icon {
    position: relative;
}

.sidebar-toggle-icon::before,
.sidebar-toggle-icon::after {
    left: 0;
    position: absolute;
}

.sidebar-toggle-icon::before {
    top: -0.3rem;
}

.sidebar-toggle-icon::after {
    top: 0.3rem;
}

.site-sidebar-content {
    opacity: 1;
    transition: opacity 120ms ease;
}

.site-layout nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

.site-layout nav a {
    color: var(--text-muted);
    display: block;
    padding: 0.25rem 0;
    text-decoration: none;
}

.site-layout nav a:hover {
    color: var(--accent-sand);
    text-decoration: underline;
}

.site-layout nav a.is-selected {
    color: var(--accent-water);
}

.author-card {
    margin-top: 2.5rem;
}

.author-card p {
    margin: 0;
}

.author-card p+p {
    margin-top: 0.4rem;
}

.author-name {
    color: var(--title);
    font-size: 0.95rem;
    font-weight: 700;
    line-height: 1.3;
}

.author-role {
    color: var(--text-muted);
    font-size: 0.8rem;
    line-height: 1.35;
}

.author-expertise {
    color: var(--text-muted);
    font-size: 0.75rem;
    line-height: 1.4;
}

.author-location {
    color: var(--text-muted);
    font-size: 0.72rem;
    line-height: 1.4;
    opacity: 0.72;
}

.site-sidebar-inner nav~p {
    color: var(--text-muted);
    font-size: 0.8rem;
    font-style: italic;
    line-height: 1.5;
}

.site-layout.is-sidebar-collapsed {
    --nav-width: 0rem;
}

.site-layout.is-sidebar-collapsed .site-sidebar {
    pointer-events: none;
}

.site-layout.is-sidebar-collapsed .site-sidebar h1 {
    display: none;
}

.site-layout.is-sidebar-collapsed .site-sidebar-content {
    height: 0;
    opacity: 0;
    overflow: hidden;
    pointer-events: none;
}

#content {
    color: var(--text);
    display: flex;
    flex-direction: column;
    grid-column: 3;
    padding: 2.5rem 2rem 2rem;
}

#content>section {
    margin-block: auto;
}

#content h3 {
    margin-block: 1.5rem 0.5rem;
}

#content ul {
    padding-inline-start: 1.25rem;
}

#content li+li {
    margin-top: 0.5rem;
}

.time-machine-overlay {
    background: rgba(2, 7, 8, 0.78);
    box-sizing: border-box;
    display: grid;
    inset: 0;
    overflow: auto;
    padding: 1rem;
    place-items: center;
    position: fixed;
    z-index: 20;
}

.time-machine-backdrop {
    inset: 0;
    position: fixed;
}

.time-machine-panel {
    background: var(--background);
    border: 1px solid var(--border);
    box-sizing: border-box;
    max-width: 64rem;
    padding: 1rem;
    position: relative;
    width: 100%;
    z-index: 1;
}

.time-machine-close {
    color: var(--text-muted);
    font-size: 1.5rem;
    line-height: 1;
    position: absolute;
    right: 0.75rem;
    text-decoration: none;
    top: 0.5rem;
}

.time-machine-form {
    align-items: end;
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.time-machine-form label {
    color: var(--text-muted);
    display: grid;
    font-size: 0.8rem;
    gap: 0.25rem;
}

.time-machine-form input {
    background: var(--background-navigation);
    border: 1px solid var(--border);
    color: var(--text);
    font: inherit;
    padding: 0.35rem 0.5rem;
}

.time-machine-error {
    color: var(--accent-sand);
}

@media (max-width: 44rem) {
    .site-layout {
        display: block;
    }

    .site-sidebar {
        border-right: 1px solid var(--border);
        box-sizing: border-box;
        display: block;
        inset: 0 auto 0 0;
        overflow-y: auto;
        padding: 2rem;
        position: fixed;
        width: min(19rem, calc(100vw - 2rem));
        z-index: 10;
    }

    .site-sidebar-inner {
        padding: 0;
    }

    .sidebar-toggle {
        left: 2rem;
    }

    .site-layout.is-sidebar-collapsed .site-sidebar {
        background: transparent;
        border-right-color: transparent;
        overflow: visible;
        padding: 0.75rem;
        width: 0;
    }

    .site-layout h1 {
        font-size: 2rem;
    }
}