:root {
    --paper: #f7f1e8;
    --ink: #1c1917;
    --muted: #78716c;
    --rule: rgba(120, 113, 108, 0.32);
    --accent: #b45309;
    --accent-strong: #f59e0b;
}

html {
    scroll-behavior: smooth;
}

body[data-public-page] {
    overflow-x: hidden;
}

body[data-public-page] header {
    gap: 1rem;
}

body[data-public-page] nav {
    flex-wrap: wrap;
    justify-content: flex-end;
    row-gap: 0.5rem;
}

[data-nav-link] {
    position: relative;
    transition: color 160ms ease;
}

[data-nav-link]::after {
    background: currentColor;
    bottom: -0.35rem;
    content: "";
    height: 2px;
    left: 0;
    position: absolute;
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 180ms ease;
    width: 100%;
}

[data-nav-link]:hover::after,
[data-nav-link].is-active::after {
    transform: scaleX(1);
}

.reveal {
    opacity: 0;
    transform: translateY(18px);
    transition: opacity 520ms ease, transform 520ms ease;
}

.reveal.is-visible {
    opacity: 1;
    transform: translateY(0);
}

.interactive-card {
    position: relative;
    transition: border-color 180ms ease, box-shadow 220ms ease, transform 220ms ease;
    will-change: transform;
}

.interactive-card:hover,
.interactive-card:focus-visible {
    box-shadow: 0 18px 45px rgba(28, 25, 23, 0.16);
    transform: translateY(-4px);
}

.interactive-card img {
    transition: transform 420ms ease, filter 420ms ease;
}

.interactive-card:hover img,
.interactive-card:focus-visible img {
    filter: saturate(1.08) contrast(1.04);
    transform: scale(1.045);
}

.editorial-link {
    position: relative;
}

.editorial-link::before {
    background: var(--accent);
    content: "";
    height: calc(100% - 1.25rem);
    left: 0;
    opacity: 0;
    position: absolute;
    top: 0.625rem;
    transform: scaleY(0.35);
    transition: opacity 180ms ease, transform 180ms ease;
    width: 3px;
}

.editorial-link:hover::before,
.editorial-link:focus-visible::before {
    opacity: 1;
    transform: scaleY(1);
}

.filter-chip {
    align-items: center;
    border: 1px solid var(--rule);
    display: inline-flex;
    gap: 0.35rem;
    line-height: 1;
    min-height: 2rem;
    padding: 0.45rem 0.75rem;
    transition: background-color 160ms ease, border-color 160ms ease, color 160ms ease, transform 160ms ease;
}

.filter-chip:hover,
.filter-chip:focus-visible,
.filter-chip.is-active {
    background: var(--ink);
    border-color: var(--ink);
    color: white;
    transform: translateY(-1px);
}

.empty-state {
    background:
        linear-gradient(135deg, rgba(180, 83, 9, 0.08), transparent 42%),
        rgba(255, 255, 255, 0.46);
    border: 1px dashed var(--rule);
}

.reading-progress {
    height: 3px;
    left: 0;
    position: fixed;
    right: 0;
    top: 0;
    z-index: 60;
}

.reading-progress__bar {
    background: var(--accent-strong);
    display: block;
    height: 100%;
    transform: scaleX(0);
    transform-origin: left;
    width: 100%;
}

.reading-layout {
    display: grid;
    gap: 2rem;
    grid-template-columns: minmax(0, 1fr);
}

@media (min-width: 1024px) {
    .reading-layout {
        grid-template-columns: minmax(0, 1fr) 14rem;
    }
}

.reading-toc {
    align-self: start;
    border-left: 1px solid var(--rule);
    color: var(--muted);
    display: none;
    font-size: 0.875rem;
    line-height: 1.45;
    padding-left: 1rem;
    position: sticky;
    top: 5rem;
}

@media (min-width: 1024px) {
    .reading-toc:not(:empty) {
        display: block;
    }
}

.reading-toc__title {
    color: var(--ink);
    font-size: 0.72rem;
    font-weight: 800;
    letter-spacing: 0.22em;
    margin-bottom: 0.85rem;
    text-transform: uppercase;
}

.reading-toc a {
    display: block;
    margin: 0.55rem 0;
    transition: color 160ms ease, transform 160ms ease;
}

.reading-toc a[data-level="3"] {
    padding-left: 0.8rem;
}

.reading-toc a.is-active {
    color: var(--accent);
    transform: translateX(3px);
}

.heading-anchor {
    color: var(--accent);
    font-size: 0.72em;
    margin-left: 0.45rem;
    opacity: 0;
    text-decoration: none;
    transition: opacity 160ms ease;
}

h2:hover .heading-anchor,
h3:hover .heading-anchor,
.heading-anchor:focus-visible {
    opacity: 1;
}

.code-copy-wrapper {
    position: relative;
}

.copy-code-button {
    background: rgba(245, 158, 11, 0.92);
    color: #1c1917;
    font-size: 0.72rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    padding: 0.35rem 0.55rem;
    position: absolute;
    right: 0.65rem;
    text-transform: uppercase;
    top: 0.65rem;
}

.copy-code-button:focus-visible {
    outline: 2px solid white;
    outline-offset: 2px;
}

.back-to-top {
    align-items: center;
    background: var(--ink);
    border: 1px solid rgba(255, 255, 255, 0.18);
    bottom: 1.25rem;
    color: white;
    display: inline-flex;
    font-size: 1rem;
    height: 2.75rem;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    position: fixed;
    right: 1.25rem;
    transform: translateY(10px);
    transition: opacity 180ms ease, transform 180ms ease;
    width: 2.75rem;
    z-index: 50;
}

.back-to-top.is-visible {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
}

.lightbox {
    align-items: center;
    background: rgba(12, 10, 9, 0.9);
    display: none;
    inset: 0;
    justify-content: center;
    padding: 1.25rem;
    position: fixed;
    z-index: 80;
}

.lightbox.is-open {
    display: flex;
}

.lightbox img {
    max-height: 88vh;
    max-width: min(92vw, 80rem);
    object-fit: contain;
}

.lightbox__close {
    background: white;
    color: var(--ink);
    font-weight: 800;
    height: 2.5rem;
    position: absolute;
    right: 1rem;
    top: 1rem;
    width: 2.5rem;
}

[data-lightbox] {
    cursor: zoom-in;
}

.article-body img {
    cursor: zoom-in;
}

.archive-toggle {
    align-items: center;
    display: flex;
    justify-content: space-between;
    text-align: left;
    width: 100%;
}

.archive-toggle__mark {
    color: var(--accent);
    transition: transform 160ms ease;
}

[data-archive-group].is-collapsed .archive-toggle__mark {
    transform: rotate(-90deg);
}

[data-archive-group].is-collapsed [data-archive-items] {
    display: none;
}

.search-highlight {
    background: rgba(245, 158, 11, 0.32);
    color: inherit;
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    *,
    *::before,
    *::after {
        animation-duration: 1ms !important;
        scroll-behavior: auto !important;
        transition-duration: 1ms !important;
    }

    .reveal {
        opacity: 1;
        transform: none;
    }

    .interactive-card:hover,
    .interactive-card:focus-visible,
    .filter-chip:hover,
    .filter-chip:focus-visible {
        transform: none;
    }
}