/* site.css — salian.in
 * Single stylesheet per AGENTS.md § 9.
 * Structure: properties → reset → typography → layout → header →
 * footer → components → pages → utilities → responsive.
 */

/* ==========================================================================
   1. CUSTOM PROPERTIES
   ========================================================================== */

:root {
    /* Fonts */
    --font-display: 'Newsreader', Georgia, 'Times New Roman', serif;
    --font-body: 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;

    /* Colors — warm, editorial palette */
    --color-ink: #1a1a2e;
    --color-ink-light: #2d2d44;
    --color-paper: #faf8f4;
    --color-paper-warm: #f5f0e8;
    --color-accent: #b8860b;
    --color-accent-hover: #9a7209;
    --color-accent-soft: #f5eddb;
    --color-accent-glow: rgba(184, 134, 11, 0.08);
    --color-muted: #6b6b7b;
    --color-muted-light: #9b9bab;
    --color-border: #e4e0d8;
    --color-border-light: #eeebe5;
    --color-surface: #ffffff;
    --color-surface-hover: #fdfcfa;

    /* Spacing scale */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2.5rem;
    --space-2xl: 4rem;
    --space-3xl: 6rem;

    /* Layout */
    --container-max: 1120px;
    --reading-max: 720px;
    --sidebar-gap: 2rem;

    /* Shadows — layered for depth */
    --shadow-sm: 0 1px 2px rgba(26, 26, 46, 0.04),
                 0 1px 3px rgba(26, 26, 46, 0.06);
    --shadow-md: 0 2px 4px rgba(26, 26, 46, 0.04),
                 0 4px 12px rgba(26, 26, 46, 0.08);
    --shadow-lg: 0 4px 8px rgba(26, 26, 46, 0.04),
                 0 8px 24px rgba(26, 26, 46, 0.10);
    --shadow-xl: 0 8px 16px rgba(26, 26, 46, 0.06),
                 0 16px 48px rgba(26, 26, 46, 0.12);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;

    /* Border radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
}


/* ==========================================================================
   2. RESET / BASE
   ========================================================================== */

*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--color-ink);
    background-color: var(--color-paper);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

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

button {
    cursor: pointer;
    font-family: inherit;
    border: none;
    background: none;
    color: inherit;
}

ul, ol {
    list-style: none;
}

[x-cloak] {
    display: none !important;
}


/* ==========================================================================
   3. TYPOGRAPHY
   ========================================================================== */

h1, h2, h3 {
    font-family: var(--font-display);
    color: var(--color-ink);
    line-height: 1.2;
    font-weight: 600;
}

h1 {
    font-size: 2.5rem;
    letter-spacing: -0.02em;
}

h2 {
    font-size: 1.75rem;
    letter-spacing: -0.01em;
}

h3 {
    font-size: 1.35rem;
}

a {
    color: var(--color-ink);
    text-decoration-color: var(--color-border);
    text-underline-offset: 3px;
    transition: color var(--transition-fast),
                text-decoration-color var(--transition-fast);
}

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

/* Body text in reading contexts */
.reading-column p,
.reading-column li {
    font-size: 1.125rem;
    line-height: 1.7;
    color: var(--color-ink-light);
}

.reading-column p + p {
    margin-top: var(--space-lg);
}

.reading-column ul,
.reading-column ol {
    margin-top: var(--space-md);
    margin-bottom: var(--space-md);
    padding-left: var(--space-lg);
}

.reading-column ul {
    list-style: disc;
}

.reading-column ol {
    list-style: decimal;
}

.reading-column li + li {
    margin-top: var(--space-sm);
}

.reading-column a {
    color: var(--color-accent);
    text-decoration: underline;
    text-decoration-color: rgba(184, 134, 11, 0.3);
}

.reading-column a:hover {
    text-decoration-color: var(--color-accent);
}

.reading-column strong {
    font-weight: 600;
    color: var(--color-ink);
}

.reading-column code {
    font-size: 0.9em;
    background: var(--color-accent-soft);
    padding: 0.15em 0.4em;
    border-radius: var(--radius-sm);
}

.reading-column pre {
    background: var(--color-ink);
    color: var(--color-paper);
    padding: var(--space-lg);
    border-radius: var(--radius-md);
    overflow-x: auto;
    margin: var(--space-xl) 0;
    font-size: 0.9rem;
    line-height: 1.5;
}

.reading-column pre code {
    background: none;
    padding: 0;
    color: inherit;
}


/* ==========================================================================
   4. LAYOUT
   ========================================================================== */

main {
    flex: 1;
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: var(--space-xl) var(--space-lg);
}

.reading-column {
    max-width: var(--reading-max);
}

.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-lg);
}


/* ==========================================================================
   5. HEADER
   ========================================================================== */

.site-header {
    border-bottom: 1px solid var(--color-border-light);
    background: var(--color-paper);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-inner {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: var(--space-lg) var(--space-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.site-name {
    font-family: var(--font-display);
    font-size: 1.35rem;
    font-weight: 600;
    text-decoration: none;
    color: var(--color-ink);
    letter-spacing: -0.01em;
}

.site-name:hover {
    color: var(--color-accent);
}

.site-nav {
    display: flex;
    gap: var(--space-xl);
}

.site-nav a {
    font-size: 0.9rem;
    font-weight: 450;
    text-decoration: none;
    color: var(--color-muted);
    position: relative;
    padding-bottom: 2px;
    transition: color var(--transition-fast);
}

.site-nav a:hover {
    color: var(--color-ink);
}

.site-nav a.is-active {
    color: var(--color-ink);
}

.site-nav a.is-active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--color-accent);
    border-radius: 1px;
}

.nav-toggle {
    display: none;
    padding: var(--space-sm);
    color: var(--color-ink);
}


/* ==========================================================================
   6. FOOTER
   ========================================================================== */

.site-footer {
    border-top: 1px solid var(--color-border-light);
    margin-top: var(--space-3xl);
    padding: var(--space-2xl) 0;
    background: var(--color-paper);
}

.footer-inner {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-inner p {
    font-size: 0.85rem;
    color: var(--color-muted);
}

.footer-links {
    display: flex;
    gap: var(--space-md);
    align-items: center;
}

.footer-links a {
    color: var(--color-muted);
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--color-accent);
}

.footer-links svg {
    display: block;
}


/* ==========================================================================
   7. COMPONENTS
   ========================================================================== */

/* --- Tags --- */

.tag {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.03em;
    text-transform: uppercase;
    color: var(--color-accent);
    background: var(--color-accent-soft);
    padding: 0.2em 0.7em;
    border-radius: 3px;
}

.tags-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

/* --- Buttons --- */

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 0.9rem;
    font-weight: 500;
    text-decoration: none;
    padding: 0.6em 1.4em;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    background: var(--color-accent);
    color: var(--color-surface);
}

.btn:hover {
    background: var(--color-accent-hover);
    color: var(--color-surface);
    box-shadow: var(--shadow-sm);
}

.btn-outline {
    background: transparent;
    color: var(--color-ink);
    box-shadow: inset 0 0 0 1.5px var(--color-border);
}

.btn-outline:hover {
    background: var(--color-surface-hover);
    color: var(--color-ink);
    box-shadow: inset 0 0 0 1.5px var(--color-muted-light);
}

/* --- Meta line --- */

.meta-line {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--space-sm);
    font-size: 0.85rem;
    color: var(--color-muted);
}

.meta-line .sep::before {
    content: '\00b7';
    margin: 0 0.15em;
}

.meta-line .category {
    text-transform: capitalize;
}

/* --- Read link (arrow) --- */

.read-link {
    display: inline-flex;
    align-items: center;
    gap: 0.35em;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--color-accent);
    text-decoration: none;
    transition: gap var(--transition-fast);
}

.read-link::after {
    content: '\2192';
    transition: transform var(--transition-fast);
}

.read-link:hover {
    color: var(--color-accent-hover);
}

.read-link:hover::after {
    transform: translateX(3px);
}

/* --- Callouts --- */

.callout {
    border-left: 3px solid var(--color-accent);
    background: var(--color-accent-glow);
    padding: var(--space-lg);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    margin: var(--space-xl) 0;
}

.callout p {
    font-size: 1.05rem;
}

.callout-tip {
    border-left-color: #2e8b57;
    background: rgba(46, 139, 87, 0.06);
}

.callout-info {
    border-left-color: #3b82f6;
    background: rgba(59, 130, 246, 0.06);
}

/* --- Blockquote --- */

.reading-column blockquote {
    border-left: 3px solid var(--color-accent);
    padding: var(--space-md) var(--space-lg);
    margin: var(--space-xl) 0;
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-style: italic;
    line-height: 1.5;
    color: var(--color-ink);
}

.reading-column blockquote p {
    font-family: var(--font-display);
    font-size: 1.25rem;
    line-height: 1.5;
    color: var(--color-ink);
}

/* --- Callout highlight (projects) --- */

.callout-highlight {
    font-family: var(--font-display);
    font-size: 1.3rem;
    font-weight: 500;
    color: var(--color-accent);
    padding: var(--space-lg);
    background: var(--color-accent-glow);
    border-radius: var(--radius-md);
    text-align: center;
    margin: var(--space-lg) 0;
}

/* --- Essay card --- */

.essay-card {
    padding: var(--space-lg) 0;
    border-bottom: 1px solid var(--color-border-light);
}

.essay-card:last-child {
    border-bottom: none;
}

.essay-card h2,
.essay-card h3 {
    font-family: var(--font-display);
    line-height: 1.3;
    margin-bottom: var(--space-xs);
}

.essay-card h2 {
    font-size: 1.4rem;
}

.essay-card h3 {
    font-size: 1.25rem;
}

.essay-card h2 a,
.essay-card h3 a {
    text-decoration: none;
    color: var(--color-ink);
}

.essay-card h2 a:hover,
.essay-card h3 a:hover {
    color: var(--color-accent);
}

.essay-card .meta-line {
    margin-bottom: var(--space-sm);
}

.essay-card p {
    font-size: 0.95rem;
    color: var(--color-muted);
    line-height: 1.55;
    margin-top: var(--space-sm);
}

.essay-card .read-link {
    margin-top: var(--space-sm);
    font-size: 0.85rem;
}

/* --- Blog card --- */

.blog-card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: box-shadow var(--transition-base),
                transform var(--transition-base);
}

.blog-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.blog-card-image {
    aspect-ratio: 16 / 10;
    overflow: hidden;
    background: var(--color-paper-warm);
}

.blog-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.blog-card-body {
    padding: var(--space-lg);
}

.blog-card h2 {
    font-size: 1.2rem;
    font-family: var(--font-display);
    margin-bottom: var(--space-xs);
    line-height: 1.3;
}

.blog-card h2 a {
    text-decoration: none;
    color: var(--color-ink);
}

.blog-card h2 a:hover {
    color: var(--color-accent);
}

.blog-card .meta-line {
    margin-bottom: var(--space-sm);
}

.blog-card p {
    font-size: 0.9rem;
    color: var(--color-muted);
    line-height: 1.5;
}

/* --- Project card --- */

.project-card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    cursor: pointer;
    transition: box-shadow var(--transition-base),
                transform var(--transition-base);
}

.project-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.project-card-image {
    aspect-ratio: 16 / 10;
    overflow: hidden;
    background: var(--color-paper-warm);
}

.project-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.project-card-body {
    padding: var(--space-lg);
}

.project-card h2 {
    font-size: 1.2rem;
    font-family: var(--font-display);
    margin-bottom: var(--space-xs);
    line-height: 1.3;
}

.project-card .subtitle {
    font-size: 0.9rem;
    color: var(--color-muted);
}

.project-card .tags-list {
    margin-top: var(--space-sm);
}

/* --- Project modal --- */

.project-modal-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(26, 26, 46, 0.6);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 200;
    padding: var(--space-lg);
}

.project-modal {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    max-width: 600px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-xl);
    position: relative;
    padding: var(--space-2xl);
}

.modal-close {
    position: absolute;
    top: var(--space-lg);
    right: var(--space-lg);
    padding: var(--space-sm);
    color: var(--color-muted);
    border-radius: var(--radius-sm);
    transition: color var(--transition-fast),
                background var(--transition-fast);
    z-index: 1;
}

.modal-close:hover {
    color: var(--color-ink);
    background: var(--color-border-light);
}

.modal-image {
    width: 100%;
    border-radius: var(--radius-md);
    margin-bottom: var(--space-lg);
}

.project-modal h2 {
    font-size: 1.5rem;
    font-family: var(--font-display);
    margin-bottom: var(--space-xs);
}

.project-modal .subtitle {
    font-size: 1rem;
    color: var(--color-muted);
    margin-bottom: var(--space-lg);
}

.modal-blurb {
    font-size: 0.95rem;
    line-height: 1.65;
    color: var(--color-ink-light);
    margin-bottom: var(--space-lg);
}

.modal-blurb p + p {
    margin-top: var(--space-md);
}

.modal-links {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    margin-bottom: var(--space-lg);
}

.modal-press {
    border-top: 1px solid var(--color-border-light);
    padding-top: var(--space-lg);
}

.modal-press h3 {
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-muted);
    margin-bottom: var(--space-sm);
}

.modal-press ul {
    list-style: none;
}

.modal-press li {
    font-size: 0.9rem;
    margin-bottom: var(--space-xs);
}

.modal-press a {
    color: var(--color-accent);
    text-decoration: none;
}

.modal-press a:hover {
    text-decoration: underline;
}

.press-source {
    font-size: 0.8rem;
    color: var(--color-muted);
    margin-left: var(--space-sm);
}

/* --- Related posts --- */

.related-posts {
    border-top: 1px solid var(--color-border-light);
    margin-top: var(--space-3xl);
    padding-top: var(--space-xl);
}

.related-posts h2 {
    font-size: 1.1rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    margin-bottom: var(--space-lg);
    color: var(--color-muted);
    text-transform: uppercase;
    font-family: var(--font-body);
}

.related-posts-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.related-posts-list a {
    font-family: var(--font-display);
    font-size: 1.15rem;
    text-decoration: none;
    color: var(--color-ink);
}

.related-posts-list a:hover {
    color: var(--color-accent);
}

/* --- Prev/Next navigation --- */

.prev-next-nav {
    display: flex;
    justify-content: space-between;
    gap: var(--space-lg);
    border-top: 1px solid var(--color-border-light);
    margin-top: var(--space-xl);
    padding-top: var(--space-xl);
}

.prev-next-nav a {
    text-decoration: none;
    font-size: 0.9rem;
    color: var(--color-muted);
    transition: color var(--transition-fast);
}

.prev-next-nav a:hover {
    color: var(--color-accent);
}

.prev-next-nav .nav-label {
    display: block;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-xs);
}

.prev-next-nav .nav-title {
    font-family: var(--font-display);
    font-size: 1.05rem;
    color: var(--color-ink);
}

.prev-next-nav a:hover .nav-title {
    color: var(--color-accent);
}

.prev-next-nav .nav-next {
    text-align: right;
    margin-left: auto;
}

/* --- Section header (used on index pages) --- */

.section-header {
    margin-bottom: var(--space-2xl);
}

.section-header h1 {
    font-size: 2.75rem;
    margin-bottom: var(--space-sm);
}

.section-header p {
    font-size: 1.1rem;
    color: var(--color-muted);
    max-width: var(--reading-max);
}


/* ==========================================================================
   8. PAGE-SPECIFIC
   ========================================================================== */

/* --- Homepage --- */

.page-home {
    display: flex;
    flex-direction: column;
    gap: var(--space-3xl);
}

/* Featured essay */
.featured-essay {
    padding: var(--space-2xl) 0;
    border-bottom: 1px solid var(--color-border-light);
}

.featured-essay .overline {
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: var(--space-md);
}

.featured-essay h1 {
    font-size: 3rem;
    line-height: 1.1;
    margin-bottom: var(--space-sm);
    max-width: var(--reading-max);
}

.featured-essay .subtitle {
    font-family: var(--font-display);
    font-size: 1.35rem;
    font-weight: 400;
    font-style: italic;
    color: var(--color-muted);
    margin-bottom: var(--space-lg);
    max-width: var(--reading-max);
}

.featured-essay .summary {
    font-size: 1.1rem;
    line-height: 1.6;
    color: var(--color-ink-light);
    margin-bottom: var(--space-lg);
    max-width: var(--reading-max);
}

.featured-essay .read-link {
    font-size: 1rem;
}

/* Recent writing */
.recent-writing h2 {
    font-size: 1rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--color-muted);
    font-family: var(--font-body);
    margin-bottom: var(--space-lg);
}

/* Homepage project highlight */
.home-project {
    padding: var(--space-xl);
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.home-project .overline {
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: var(--space-md);
}

.home-project h3 {
    font-family: var(--font-display);
    font-size: 1.4rem;
    margin-bottom: var(--space-xs);
}

.home-project .subtitle {
    font-size: 0.95rem;
    color: var(--color-muted);
    margin-bottom: var(--space-md);
}

.home-project .project-blurb {
    font-size: 0.95rem;
    color: var(--color-ink-light);
    line-height: 1.55;
    margin-bottom: var(--space-lg);
}

.home-project .project-blurb p + p {
    margin-top: var(--space-sm);
}

/* Homepage photograph */
.home-photograph {
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.home-photograph figure {
    position: relative;
}

.home-photograph img {
    width: 100%;
    display: block;
}

.home-photograph .photo-placeholder {
    aspect-ratio: 21 / 9;
    background: linear-gradient(
        135deg,
        var(--color-paper-warm) 0%,
        var(--color-border-light) 100%
    );
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-muted-light);
    font-size: 0.9rem;
}

.home-photograph figcaption {
    font-size: 0.85rem;
    color: var(--color-muted);
    padding: var(--space-sm) 0;
    font-style: italic;
}


/* --- Single essay --- */

.essay-header {
    margin-bottom: var(--space-2xl);
    max-width: var(--reading-max);
}

.essay-header h1 {
    font-size: 2.75rem;
    line-height: 1.1;
    margin-bottom: var(--space-sm);
}

.essay-header .subtitle {
    font-family: var(--font-display);
    font-size: 1.3rem;
    font-weight: 400;
    font-style: italic;
    color: var(--color-muted);
    margin-bottom: var(--space-lg);
}

.essay-header .meta-line {
    padding-top: var(--space-md);
    border-top: 1px solid var(--color-border-light);
}

.essay-body section {
    margin-top: var(--space-2xl);
}

.essay-body h2 {
    margin-bottom: var(--space-lg);
}

.essay-tags {
    margin-top: var(--space-2xl);
    max-width: var(--reading-max);
}


/* --- Essay index --- */

.page-essay-index .section-header {
    margin-bottom: var(--space-xl);
}


/* --- Single blog post --- */

.blog-post .post-header {
    margin-bottom: var(--space-xl);
}

.blog-post .post-header h1 {
    font-size: 2.25rem;
    margin-bottom: var(--space-sm);
}

.post-hero-image {
    margin-bottom: var(--space-xl);
    border-radius: var(--radius-lg);
    overflow: hidden;
    max-width: var(--reading-max);
}

.post-hero-image img {
    width: 100%;
    display: block;
}

/* Placeholder for missing hero images */
.post-hero-placeholder {
    aspect-ratio: 16 / 9;
    background: linear-gradient(
        135deg,
        var(--color-paper-warm) 0%,
        var(--color-border-light) 100%
    );
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-xl);
    max-width: var(--reading-max);
}

.post-body section {
    margin-top: var(--space-2xl);
}

.post-body h2 {
    margin-bottom: var(--space-lg);
}

.post-tags {
    margin-top: var(--space-2xl);
    max-width: var(--reading-max);
}


/* --- Blog index --- */

.blog-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-xl);
}


/* --- Projects --- */

.project-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-xl);
}


/* --- Photography --- */

.page-photography .section-header {
    margin-bottom: var(--space-xl);
}

.photo-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-md);
}

.photo-item {
    border-radius: var(--radius-md);
    overflow: hidden;
    cursor: pointer;
    position: relative;
}

.photo-item .photo-placeholder {
    aspect-ratio: 1;
    background: linear-gradient(
        135deg,
        var(--color-paper-warm) 0%,
        var(--color-border-light) 100%
    );
}

.photo-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.photo-item:hover img {
    transform: scale(1.03);
}

/* Lightbox */
.lightbox-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(26, 26, 46, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 200;
    padding: var(--space-xl);
}

.lightbox-content {
    max-width: 90vw;
    max-height: 85vh;
    position: relative;
}

.lightbox-content img {
    max-width: 100%;
    max-height: 80vh;
    border-radius: var(--radius-md);
}

.lightbox-close {
    position: absolute;
    top: calc(-1 * var(--space-xl));
    right: 0;
    color: white;
    padding: var(--space-sm);
}

.lightbox-caption {
    text-align: center;
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
    margin-top: var(--space-md);
    font-style: italic;
}


/* --- About page --- */

.page-about {
    max-width: var(--reading-max);
}

.page-about h1 {
    font-size: 2.75rem;
    margin-bottom: var(--space-2xl);
}

.about-photo {
    width: 180px;
    height: 180px;
    border-radius: 50%;
    overflow: hidden;
    float: right;
    margin: 0 0 var(--space-lg) var(--space-xl);
    box-shadow: var(--shadow-md);
}

.about-photo .photo-placeholder {
    width: 100%;
    height: 100%;
    background: linear-gradient(
        135deg,
        var(--color-paper-warm) 0%,
        var(--color-accent-soft) 100%
    );
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-muted-light);
    font-size: 3rem;
    font-family: var(--font-display);
}

.about-section {
    margin-bottom: var(--space-2xl);
}

.about-section h2 {
    font-size: 1.35rem;
    margin-bottom: var(--space-md);
}

.about-section p {
    font-size: 1.05rem;
    line-height: 1.7;
    color: var(--color-ink-light);
}

.about-section p + p {
    margin-top: var(--space-md);
}

.about-links {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-md);
    margin-top: var(--space-lg);
}

.about-links a {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 0.9rem;
    color: var(--color-accent);
    text-decoration: none;
}

.about-links a:hover {
    text-decoration: underline;
}


/* --- 404 page --- */

.page-404 {
    text-align: center;
    padding: var(--space-3xl) 0;
}

.page-404 h1 {
    font-size: 4rem;
    margin-bottom: var(--space-md);
    color: var(--color-border);
}

.page-404 .four-oh-four-message {
    font-size: 1.15rem;
    color: var(--color-muted);
    margin-bottom: var(--space-2xl);
}

.not-found-nav {
    display: flex;
    justify-content: center;
    gap: var(--space-xl);
    flex-wrap: wrap;
}

.not-found-nav a {
    color: var(--color-accent);
    text-decoration: none;
    font-weight: 500;
}

.not-found-nav a:hover {
    text-decoration: underline;
}


/* ==========================================================================
   9. UTILITIES
   ========================================================================== */

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.text-center {
    text-align: center;
}

.text-muted {
    color: var(--color-muted);
}

.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }
.mt-2xl { margin-top: var(--space-2xl); }

.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }


/* ==========================================================================
   10. RESPONSIVE
   ========================================================================== */

/* Tablet and below */
@media (max-width: 1023px) {
    .blog-grid {
        gap: var(--space-lg);
    }

    .project-grid {
        gap: var(--space-lg);
    }

    .photo-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Mobile */
@media (max-width: 767px) {
    /* Header */
    .nav-toggle {
        display: block;
    }

    .site-nav {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--color-paper);
        border-bottom: 1px solid var(--color-border-light);
        padding: var(--space-lg);
        gap: var(--space-lg);
        box-shadow: var(--shadow-md);
    }

    .site-nav.is-open {
        display: flex;
    }

    .site-nav a {
        font-size: 1rem;
    }

    .site-nav a.is-active::after {
        display: none;
    }

    /* Typography */
    h1 {
        font-size: 2rem;
    }

    .featured-essay h1 {
        font-size: 2.25rem;
    }

    .featured-essay .subtitle {
        font-size: 1.15rem;
    }

    .section-header h1 {
        font-size: 2.25rem;
    }

    .essay-header h1 {
        font-size: 2rem;
    }

    /* Grids */
    .blog-grid {
        grid-template-columns: 1fr;
    }

    .project-grid {
        grid-template-columns: 1fr;
    }

    .photo-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    /* About */
    .about-photo {
        float: none;
        margin: 0 auto var(--space-xl) auto;
    }

    /* Prev/next */
    .prev-next-nav {
        flex-direction: column;
    }

    .prev-next-nav .nav-next {
        text-align: left;
    }

    /* Modal */
    .project-modal {
        padding: var(--space-lg);
    }

    /* Footer */
    .footer-inner {
        flex-direction: column;
        gap: var(--space-md);
        text-align: center;
    }

    /* Main padding */
    main {
        padding: var(--space-lg) var(--space-md);
    }

    /* Home page */
    .page-home {
        gap: var(--space-2xl);
    }

    /* 404 */
    .page-404 h1 {
        font-size: 3rem;
    }
}

/* Small mobile */
@media (max-width: 374px) {
    .photo-grid {
        grid-template-columns: 1fr;
    }

    .not-found-nav {
        flex-direction: column;
        align-items: center;
    }
}