/*
Theme Name: Retro OS Portfolio
Theme URI: https://github.com/
Author: Balaji Laxman Naik
Author URI: https://github.com/
Description: A custom pixel-art and retro OS inspired portfolio theme for showcasing robotics, computer vision, and engineering projects. Projects can be imported straight from research-paper PDFs. Built with vanilla JS and CSS Grid/Flexbox.
Version: 2.0
Requires at least: 6.0
Tested up to: 6.6
Requires PHP: 7.4
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: retro-portfolio
*/

/* ==========================================================================
   CSS Variables & Design System
   ========================================================================== */
:root {
    /* Color Tokens from Retro-OS UI Kit */
    --color-gray: #A0A0A0;
    --color-white: #F0F0F0;
    --color-blue: #0078D7;
    --color-red: #E81123;
    --color-black: #000000;
    --color-bg-light: #E0EAEF;
    --color-blue-dark: #005A9E;
    --color-ink-soft: #2b2b2b;

    /* Typography */
    --font-bitmap: 'Press Start 2P', 'Courier New', Courier, monospace;
    --font-modern: 'VT323', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;

    /* Borders & Radius */
    --border-standard: 2px solid var(--color-black);
    --border-blue: 1px solid var(--color-blue);
    --radius-standard: 4px;
    --shadow-retro: 2px 2px 0px var(--color-black);

    /* Spacing */
    --space-1: 0.5rem;
    --space-2: 1rem;
    --space-3: 1.5rem;
    --space-4: 2rem;
}

/* ==========================================================================
   Reset & Base Styles
   ========================================================================== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

[hidden] {
    display: none !important;
}

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    background-color: var(--color-bg-light);
    color: var(--color-black);
    font-family: var(--font-modern);
    font-size: 1.3rem; /* VT323 renders small, so the base is larger */
    line-height: 1.4;
    padding: 0.75rem;
    background-image: radial-gradient(var(--color-gray) 1px, transparent 1px);
    background-size: 20px 20px;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-bitmap);
    font-weight: normal;
    line-height: 1.5;
    margin-bottom: 1rem;
    text-transform: uppercase;
    overflow-wrap: anywhere;
}

h1 { font-size: 1.05rem; }
h2 { font-size: 0.9rem; }
h3 { font-size: 0.8rem; }

p + p { margin-top: 0.75rem; }

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

a:hover {
    color: var(--color-red);
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
summary:focus-visible {
    outline: 3px solid var(--color-red);
    outline-offset: 2px;
}

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

.screen-reader-text {
    border: 0;
    clip: rect(1px, 1px, 1px, 1px);
    clip-path: inset(50%);
    height: 1px;
    margin: -1px;
    overflow: hidden;
    padding: 0;
    position: absolute;
    width: 1px;
    word-wrap: normal;
}

.skip-link:focus {
    background: var(--color-white);
    border: var(--border-standard);
    clip: auto;
    clip-path: none;
    color: var(--color-black);
    height: auto;
    left: 0.5rem;
    padding: 0.75rem 1rem;
    top: 0.5rem;
    width: auto;
    z-index: 100000;
}

/* ==========================================================================
   Retro OS Components
   ========================================================================== */

/* Main Window Container */
.os-window {
    background-color: var(--color-white);
    border: var(--border-standard);
    border-radius: var(--radius-standard);
    box-shadow: var(--shadow-retro);
    margin-bottom: var(--space-4);
    overflow: hidden;
}

.os-window--nested {
    border-color: var(--color-blue);
}

/* Window Header Bar */
.os-window-header {
    background-color: var(--color-white);
    border-bottom: var(--border-standard);
    padding: 0.5rem 1rem;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--font-bitmap);
    font-size: 0.75rem;
}

.os-window-header--blue {
    background-color: var(--color-blue);
    color: var(--color-white);
    border-bottom: var(--border-blue);
}

.window-title {
    min-width: 0;
    overflow-wrap: anywhere;
    font-size: 0.7rem;
}

.os-window-controls {
    display: flex;
    gap: 4px;
    flex-shrink: 0;
    margin-left: auto;
}

.os-control-btn {
    width: 18px;
    height: 18px;
    border: 1px solid var(--color-black);
    background-color: var(--color-white);
    display: inline-block;
}

.os-control-btn--close {
    background-color: var(--color-red);
    color: var(--color-white);
    font-family: sans-serif;
    font-weight: bold;
    font-size: 11px;
    line-height: 16px;
    text-align: center;
}

.os-control-btn--close:hover {
    color: var(--color-white);
    background-color: var(--color-black);
}

/* Navigation (mobile first: collapsed behind the Menu button) */
.nav-toggle {
    margin-left: auto;
}

.site-navigation {
    display: none;
    order: 3;
    width: 100%;
}

.site-navigation.is-open {
    display: block;
}

.primary-menu {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    padding: 0.5rem 0;
}

.primary-menu a {
    display: block;
    padding: 0.25rem 0;
}

.primary-menu .current-menu-item > a,
.primary-menu .current_page_item > a {
    color: var(--color-red);
}

/* Buttons */
.retro-btn {
    display: inline-block;
    background-color: var(--color-blue);
    color: var(--color-white);
    border: var(--border-standard);
    border-radius: var(--radius-standard);
    padding: 0.5rem 1rem;
    font-family: var(--font-bitmap);
    font-size: 0.65rem;
    line-height: 1.4;
    text-align: center;
    cursor: pointer;
    box-shadow: 1px 1px 0px var(--color-black);
    transition: transform 0.1s, box-shadow 0.1s;
}

.retro-btn:hover {
    background-color: var(--color-white);
    color: var(--color-blue);
}

.retro-btn:active {
    transform: translate(1px, 1px);
    box-shadow: none;
}

.retro-btn--dark { background-color: var(--color-black); }
.retro-btn--dark:hover { color: var(--color-black); }
.retro-btn--red { background-color: var(--color-red); }
.retro-btn--red:hover { color: var(--color-red); }
.retro-btn--ghost { background-color: var(--color-white); color: var(--color-black); }
.retro-btn--ghost:hover { background-color: var(--color-gray); color: var(--color-black); }

/* Panels: a titled window section */
.panel {
    border: var(--border-blue);
    background: var(--color-white);
    margin-bottom: var(--space-3);
}

.panel__title {
    background: var(--color-blue);
    color: var(--color-white);
    font-size: 0.65rem;
    margin: 0;
    padding: 0.5rem 0.75rem;
}

.panel__body {
    padding: var(--space-2);
}

.alert {
    background: var(--color-white);
    border: var(--border-standard);
    padding: var(--space-2);
    margin-top: var(--space-2);
}

/* ==========================================================================
   Layout wrappers
   ========================================================================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
}

.content-area,
.portfolio-showcase,
.home,
.project-detail-container {
    padding: var(--space-2);
}

.project-detail-container {
    max-width: 1000px;
    margin: 0 auto;
}

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

.archive-header {
    margin-bottom: var(--space-3);
    border-bottom: var(--border-blue);
    padding-bottom: var(--space-2);
}

.archive-title {
    color: var(--color-blue);
    margin-bottom: 0.5rem;
}

.archive-subtitle {
    font-family: var(--font-bitmap);
    font-size: 0.6rem;
    line-height: 1.8;
}

/* ==========================================================================
   Home page
   ========================================================================== */
.boot-screen {
    background: var(--color-black);
    color: var(--color-white);
    border: var(--border-standard);
    box-shadow: var(--shadow-retro);
    padding: var(--space-3) var(--space-2);
    margin-bottom: var(--space-3);
}

.boot-screen__line {
    font-family: var(--font-bitmap);
    font-size: 0.6rem;
    color: var(--color-gray);
    margin-bottom: 1rem;
}

.boot-screen__title {
    font-size: 1.1rem;
    line-height: 1.6;
    margin-bottom: 1rem;
}

.boot-screen__intro {
    max-width: 60ch;
    font-size: 1.5rem;
    margin-bottom: var(--space-3);
}

.cursor {
    animation: blink 1s steps(1) infinite;
}

@keyframes blink {
    50% { opacity: 0; }
}

.boot-stats {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2) var(--space-4);
    margin-bottom: var(--space-3);
}

.boot-stats dt {
    font-size: 1.1rem;
    color: var(--color-gray);
}

.boot-stats dd {
    font-family: var(--font-bitmap);
    font-size: 1.1rem;
    color: var(--color-white);
}

.boot-search {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem;
}

.boot-search input {
    flex: 1 1 14rem;
    min-width: 0;
}

.boot-search .search-field__prompt {
    color: var(--color-white);
}

.guide-list {
    padding-left: 1.5rem;
    max-width: 70ch;
}

.guide-list li + li {
    margin-top: 0.5rem;
}

.folder-list {
    list-style: none;
    display: grid;
    gap: 0.75rem;
    grid-template-columns: 1fr;
}

.folder-list a {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.75rem 1rem;
    border: var(--border-standard);
    background: var(--color-bg-light);
    color: var(--color-black);
}

.folder-list a:hover {
    background: var(--color-blue);
    color: var(--color-white);
}

.folder-list__name {
    font-family: var(--font-bitmap);
    font-size: 0.7rem;
    line-height: 1.6;
}

.home-more {
    margin-top: var(--space-3);
}

/* ==========================================================================
   Search + filters
   ========================================================================== */
.filter-bar {
    margin-bottom: var(--space-3);
}

.filter-row {
    margin-bottom: var(--space-2);
}

.filter-label {
    display: block;
    font-family: var(--font-bitmap);
    font-size: 0.6rem;
    line-height: 1.6;
    margin-bottom: 0.5rem;
    cursor: default;
}

summary.filter-label {
    cursor: pointer;
}

.search-field {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.search-field__prompt {
    font-family: var(--font-bitmap);
    color: var(--color-blue);
}

input[type="search"],
input[type="text"],
select {
    font-family: var(--font-modern);
    font-size: 1.3rem;
    padding: 0.35rem 0.6rem;
    border: var(--border-standard);
    border-radius: 0;
    background: var(--color-white);
    color: var(--color-black);
}

.search-field input {
    flex: 1;
    min-width: 0;
}

.chip-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.chip {
    font-family: var(--font-modern);
    font-size: 1.15rem;
    padding: 0.15rem 0.7rem;
    border: var(--border-standard);
    border-radius: var(--radius-standard);
    background: var(--color-white);
    color: var(--color-black);
    cursor: pointer;
}

.chip:hover {
    background: var(--color-bg-light);
}

.chip[aria-pressed="true"] {
    background: var(--color-blue);
    color: var(--color-white);
}

.filter-row--inline {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-end;
    gap: var(--space-2);
}

.filter-select select {
    min-width: 9rem;
}

.filter-count {
    font-family: var(--font-bitmap);
    font-size: 0.6rem;
    line-height: 1.8;
    margin: 0;
}

/* ==========================================================================
   Project Grid & cards
   ========================================================================== */
.project-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-3);
}

.project-card {
    position: relative;
    display: flex;
    flex-direction: column;
    background: var(--color-white);
    border: var(--border-blue);
    transition: transform 0.2s, box-shadow 0.2s;
}

.project-card:hover,
.project-card:focus-within {
    transform: translateY(-4px);
    box-shadow: 4px 4px 0px var(--color-blue);
}

.project-thumbnail {
    display: block;
    border-bottom: var(--border-standard);
    aspect-ratio: 16 / 10;
    background: var(--color-bg-light);
    overflow: hidden;
}

.project-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: contrast(1.1) grayscale(0.15);
}

.project-thumbnail__empty {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
    font-family: var(--font-bitmap);
    font-size: 0.7rem;
    color: var(--color-ink-soft);
    background-image: repeating-linear-gradient(45deg, var(--color-bg-light) 0 8px, var(--color-white) 8px 16px);
}

.pin-badge {
    position: absolute;
    top: 0.5rem;
    left: 0.5rem;
    background: var(--color-red);
    color: var(--color-white);
    border: var(--border-standard);
    font-family: var(--font-bitmap);
    font-size: 0.55rem;
    padding: 0.25rem 0.4rem;
}

.project-card__body {
    display: flex;
    flex: 1;
    flex-direction: column;
    padding: var(--space-2);
}

.project-card__meta {
    font-size: 1.1rem;
    color: var(--color-ink-soft);
    margin-bottom: 0.25rem;
}

.project-title {
    font-size: 0.8rem;
    margin-bottom: 0.5rem;
}

.project-excerpt {
    font-size: 1.2rem;
    margin-bottom: var(--space-2);
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    margin-top: auto;
}

.tag {
    background-color: var(--color-gray);
    color: var(--color-black);
    padding: 0 0.5rem;
    font-size: 1.05rem;
    line-height: 1.5;
    border: 1px solid var(--color-black);
}

a.tag:hover {
    background-color: var(--color-blue);
    color: var(--color-white);
}

.project-action {
    margin-top: var(--space-2);
}

/* ==========================================================================
   Single project
   ========================================================================== */
.project-article {
    padding: var(--space-2);
}

.project-article .entry-title {
    font-size: 1.05rem;
    line-height: 1.6;
    margin-bottom: var(--space-2);
    padding-bottom: var(--space-2);
    border-bottom: 2px dashed var(--color-gray);
}

.tldr {
    border: var(--border-standard);
    border-left-width: 8px;
    border-left-color: var(--color-blue);
    background: var(--color-white);
    padding: var(--space-2);
    margin-bottom: var(--space-3);
    font-size: 1.45rem;
    max-width: 70ch;
}

.tldr__label {
    display: block;
    font-family: var(--font-bitmap);
    font-weight: normal;
    font-size: 0.6rem;
    color: var(--color-blue);
    margin-bottom: 0.5rem;
}

.project-meta {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-2);
    margin-bottom: var(--space-3);
    background: var(--color-bg-light);
    padding: var(--space-2);
    border: var(--border-standard);
}

.meta-label {
    display: block;
    font-family: var(--font-bitmap);
    font-size: 0.6rem;
    font-weight: normal;
    margin-bottom: 0.4rem;
}

.meta-item--links {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem;
}

.metrics {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(9rem, 1fr));
    gap: var(--space-2);
    margin-bottom: var(--space-3);
}

.metric {
    border: var(--border-standard);
    background: var(--color-white);
    box-shadow: var(--shadow-retro);
    padding: var(--space-2);
}

.metric__value {
    display: block;
    font-family: var(--font-bitmap);
    font-size: 1rem;
    line-height: 1.4;
    color: var(--color-blue);
    overflow-wrap: anywhere;
}

.metric__label {
    display: block;
    font-size: 1.15rem;
    margin-top: 0.4rem;
}

.project-hero {
    border: var(--border-standard);
    margin-bottom: var(--space-3);
    box-shadow: var(--shadow-retro);
}

.project-hero figcaption,
.gallery-caption {
    font-size: 1.1rem;
    padding: 0.4rem 0.6rem;
    color: var(--color-ink-soft);
}

.project-layout {
    display: block;
}

.project-toc {
    border: var(--border-blue);
    background: var(--color-white);
    padding: var(--space-2);
    margin-bottom: var(--space-3);
    width: fit-content;
    max-width: 100%;
    justify-self: start;
    overflow-wrap: anywhere;
}

.project-toc ol { max-width: 100%; }

.project-toc__title {
    display: block;
    font-family: var(--font-bitmap);
    font-size: 0.6rem;
    font-weight: normal;
    color: var(--color-blue);
    margin-bottom: 0.5rem;
}

.project-toc ol {
    list-style: none;
}

.project-toc li + li {
    margin-top: 0.35rem;
}

.project-toc a {
    display: block;
    color: var(--color-black);
    line-height: 1.2;
    padding-left: 0.5rem;
    border-left: 3px solid transparent;
}

.project-toc a:hover,
.project-toc a[aria-current="true"] {
    color: var(--color-blue);
    border-left-color: var(--color-blue);
}

.entry-content {
    font-size: 1.45rem;
    line-height: 1.35;
    min-width: 0;
    max-width: 70ch;
}

.entry-content > * + * {
    margin-top: 1rem;
}

.entry-content h2 {
    font-size: 0.85rem;
    margin-top: var(--space-4);
    padding-bottom: 0.5rem;
    border-bottom: 2px dashed var(--color-gray);
    scroll-margin-top: 1rem;
}

.entry-content h3,
.entry-content h4 {
    font-size: 0.7rem;
    margin-top: var(--space-3);
    color: var(--color-blue);
    scroll-margin-top: 1rem;
}

.entry-content ul,
.entry-content ol {
    padding-left: 1.5rem;
}

.entry-content blockquote {
    border-left: 4px solid var(--color-blue);
    padding-left: 1rem;
}

.entry-content pre,
.entry-content table {
    display: block;
    max-width: 100%;
    overflow-x: auto;
}

.entry-content pre {
    background: var(--color-black);
    color: var(--color-white);
    padding: 1rem;
}

.entry-content th,
.entry-content td {
    border: 1px solid var(--color-black);
    padding: 0.25rem 0.6rem;
}

.project-gallery {
    margin-top: var(--space-4);
}

.project-module {
    margin-top: var(--space-4);
    min-width: 0;
    max-width: 70ch;
}

.project-module h2 {
    font-size: 0.85rem;
    margin-bottom: var(--space-2);
    padding-bottom: 0.5rem;
    border-bottom: 2px dashed var(--color-gray);
}

.project-resources__list {
    list-style: none;
    display: grid;
    gap: var(--space-2);
    padding: 0;
}

.project-resources__list li {
    border: var(--border-standard);
    background: var(--color-white);
    padding: 0.75rem;
    overflow-wrap: anywhere;
}

.project-resources__list p {
    margin: 0.35rem 0 0;
}

.project-module > img,
.project-module video {
    width: 100%;
    height: auto;
    border: var(--border-standard);
    background: var(--color-black);
}

.project-video-embed {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 9;
    border: var(--border-standard);
    background: var(--color-black);
}

.project-video-embed iframe {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    border: 0;
}

.module-placeholder {
    display: inline-block;
    max-width: 100%;
    border: 1px dashed var(--color-blue);
    background: var(--color-bg-light);
    padding: 0.75rem;
    overflow-wrap: anywhere;
}

.project-table-wrap {
    max-width: 100%;
    overflow-x: auto;
    border: var(--border-standard);
}

.project-data-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--color-white);
}

.project-data-table th,
.project-data-table td {
    padding: 0.4rem 0.65rem;
    border: 1px solid var(--color-black);
    text-align: left;
    vertical-align: top;
}

.project-data-table th {
    background: var(--color-bg-light);
    font-family: var(--font-bitmap);
    font-size: 0.55rem;
}

.profile-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: var(--space-2);
}

.profile-grid .panel { min-width: 0; }

.profile-contact {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--space-2);
}

.gallery-grid {
    list-style: none;
    display: grid;
    gap: var(--space-2);
    grid-template-columns: repeat(auto-fill, minmax(10rem, 1fr));
}

.gallery-grid li {
    border: var(--border-standard);
    background: var(--color-white);
}

.gallery-grid a {
    display: block;
    aspect-ratio: 4 / 3;
    overflow: hidden;
    background: var(--color-white);
}

.gallery-grid img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.project-navigation {
    margin-top: var(--space-3);
    text-align: center;
}

.post-navigation {
    margin-top: var(--space-3);
}

.post-navigation .nav-links {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    font-size: 1.2rem;
}

/* Lightbox (native <dialog>) */
.lightbox {
    border: var(--border-standard);
    background: var(--color-white);
    box-shadow: 6px 6px 0 var(--color-black);
    padding: 0;
    max-width: 96vw;
    max-height: 94vh;
    margin: auto;
    overflow: auto;
}

.lightbox::backdrop {
    background: rgba(0, 0, 0, 0.8);
}

.lightbox__bar,
.lightbox__nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
    padding: 0.5rem 0.75rem;
    background: var(--color-blue);
    color: var(--color-white);
    font-family: var(--font-bitmap);
    font-size: 0.6rem;
}

.lightbox__nav {
    background: var(--color-bg-light);
}

.lightbox__figure {
    margin: 0;
    padding: 0.75rem;
}

.lightbox__figure img {
    margin: 0 auto;
    max-height: 70vh;
    object-fit: contain;
}

.lightbox__figure figcaption {
    margin-top: 0.5rem;
    max-width: 70ch;
    font-size: 1.2rem;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.os-window-footer {
    background: var(--color-gray);
    border-top: var(--border-standard);
    padding: 0.75rem 1rem;
    font-family: var(--font-bitmap);
    font-size: 0.6rem;
    line-height: 1.8;
}

.os-window-footer a {
    color: var(--color-black);
    text-decoration: underline;
}

.os-window-footer a:hover {
    color: var(--color-red);
}

.social-links ul {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.5rem 1.25rem;
    margin-bottom: 0.75rem;
}

/* Pagination (blog fallback) */
.pagination {
    margin-top: var(--space-4);
    font-family: var(--font-bitmap);
    font-size: 0.65rem;
}

.pagination .nav-links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.pagination .page-numbers {
    border: var(--border-standard);
    padding: 0.25rem 0.6rem;
    background: var(--color-white);
}

.pagination .current {
    background: var(--color-blue);
    color: var(--color-white);
}

/* ==========================================================================
   Tablet (>= 40em)
   ========================================================================== */
@media (min-width: 40em) {
    body { padding: 1.25rem; }

    .project-grid { grid-template-columns: repeat(2, 1fr); }
    .project-grid--pinned { grid-template-columns: repeat(2, 1fr); }
    .folder-list { grid-template-columns: repeat(2, 1fr); }
    .project-meta { grid-template-columns: repeat(2, 1fr); }
    .meta-item--wide,
    .meta-item--links { grid-column: 1 / -1; }

    .boot-screen { padding: var(--space-4); }
    .boot-screen__title { font-size: 1.4rem; }
    .post-navigation .nav-links { flex-direction: row; justify-content: space-between; }
    .profile-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

/* ==========================================================================
   Desktop (>= 64em)
   ========================================================================== */
@media (min-width: 64em) {
    body { padding: 2rem; }

    .content-area,
    .portfolio-showcase,
    .home,
    .project-detail-container,
    .profile-page { padding: var(--space-4); }

    .project-article { padding: var(--space-4); }

    /* Header: inline navigation, no toggle */
    .nav-toggle { display: none; }
    .site-navigation { display: block; order: 0; width: auto; margin-left: auto; }
    .primary-menu { flex-direction: row; gap: 1.25rem; padding: 0; }
    .primary-menu a { padding: 0; }

    .project-grid { grid-template-columns: repeat(3, 1fr); }
    .project-grid--pinned { grid-template-columns: repeat(2, 1fr); }
    .folder-list { grid-template-columns: repeat(3, 1fr); }
    .project-meta { grid-template-columns: repeat(3, 1fr); }

    .project-layout {
        display: grid;
        grid-template-columns: minmax(0, 14rem) minmax(0, 1fr);
        gap: var(--space-4);
        align-items: start;
    }

    .project-toc {
        position: sticky;
        top: 1rem;
        margin-bottom: 0;
        max-height: calc(100vh - 2rem);
        overflow-y: auto;
    }

    .profile-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

/* ==========================================================================
   Print (project pages double as a quick paper summary)
   ========================================================================== */
@media print {
    body { background: #fff; padding: 0; }
    .site-navigation, .nav-toggle, .os-window-controls, .project-toc,
    .project-navigation, .post-navigation, .os-window-footer { display: none !important; }
    .os-window { box-shadow: none; }
}

/* ==========================================================================
   Reduced motion
   ========================================================================== */
@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    .cursor { animation: none; }
    .project-card,
    .retro-btn { transition: none; }
    .project-card:hover,
    .project-card:focus-within { transform: none; }
}