/*
Theme Name: PHP Editorial
Theme URI: https://example.com/php-editorial
Author: PHPEditorial
Author URI: https://example.com
Description: A premium editorial theme for PHP & developer-focused blogs. Clean, modern design with Tailwind CSS.
Version: 1.0.0
Requires at least: 6.0
Tested up to: 6.7
Requires PHP: 8.0
License: GNU General Public License v2 or later
License URI: https://www.gnu.org/licenses/gpl-2.0.html
Text Domain: php-editorial
Tags: blog, two-columns, right-sidebar, custom-header, custom-menu, featured-images, threaded-comments
*/

/* =========================================================
   CSS Custom Properties (Design Tokens)
   ========================================================= */
:root {
    /* Color palette */
    --color-primary:              #2D3E50;
    --color-primary-container:    #42566A;
    --color-primary-fixed:        #DDE3E9;
    --color-primary-fixed-dim:    #B8CADB;
    --color-on-primary:           #FFFFFF;
    --color-on-primary-container: #A0B3C1;
    --color-on-primary-fixed:     #101D29;

    --color-secondary:            #3E5C76;
    --color-secondary-container:  #90CAF9;
    --color-on-secondary:         #FFFFFF;
    --color-on-secondary-container: #2D3E50;

    --color-tertiary:             #3A4A5A;
    --color-tertiary-fixed:       #CAD5E0;
    --color-on-tertiary:          #FFFFFF;

    --color-surface:              #F8F9FA;
    --color-surface-variant:      #E1E2E4;
    --color-surface-container-lowest: #FFFFFF;
    --color-surface-container-low:    #F1F2F3;
    --color-surface-container:        #EDEEF0;
    --color-surface-container-high:   #E7E8EA;
    --color-surface-container-highest:#E1E2E4;
    --color-surface-bright:       #F8F9FA;
    --color-surface-dim:          #D9DADC;

    --color-background:           #F8F9FA;
    --color-on-background:        #1A1C1E;
    --color-on-surface:           #1A1C1E;
    --color-on-surface-variant:   #44474E;

    --color-outline:              #71787E;
    --color-outline-variant:      #C1C7CE;

    --color-error:                #B00020;
    --color-error-container:      #F9DEDC;
    --color-on-error:             #FFFFFF;

    --color-inverse-surface:      #2F3033;
    --color-inverse-on-surface:   #F2F4F5;
    --color-inverse-primary:      #B8CADB;

    /* Typography */
    --font-headline: 'Space Grotesk', sans-serif;
    --font-body:     'Zen Kaku Gothic New', sans-serif;

    /* Spacing & Radius */
    --radius-sm:   0.375rem;
    --radius:      0.5rem;
    --radius-lg:   0.5rem;
    --radius-xl:   1rem;
    --radius-full: 9999px;

    /* Layout */
    --max-width: 1440px;
    --content-padding-x: 1.5rem;
}

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

html { font-size: 16px; scroll-behavior: smooth; }

body {
    font-family:    var(--font-body);
    font-size:      1rem;
    line-height:    1.8;
    letter-spacing: 0.02em;
    background:     var(--color-background);
    color:          var(--color-on-surface);
}

img, video { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }

/* =========================================================
   Typography
   ========================================================= */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-headline);
    color:       var(--color-primary);
    line-height: 1.2;
}

h1 { font-size: 2rem;   line-height: 1.3; margin-bottom: 1rem; }
h2 { font-size: 1.6rem; line-height: 1.4; margin: 2.5rem 0 1rem; }
h3 { font-size: 1.3rem; line-height: 1.5; margin: 2rem 0 0.8rem; }
h4 { font-size: 1.1rem; line-height: 1.6; margin: 1.5rem 0 0.6rem; }
h5 { font-size: 1rem;   line-height: 1.6; margin: 1.2rem 0 0.5rem; }

p { font-size: 1rem; line-height: 1.9; margin-bottom: 1.5em; }

/* =========================================================
   Layout Helpers
   ========================================================= */
.site-container {
    max-width:      var(--max-width);
    margin-inline:  auto;
    padding-inline: var(--content-padding-x);
}

/* =========================================================
   Site Header / Navigation
   ========================================================= */
.site-header {
    position:    fixed;
    top:         0;
    width:       100%;
    z-index:     50;
    background:  rgba(255,255,255,0.80);
    -webkit-backdrop-filter: blur(20px);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(193,199,206,0.30);
    box-shadow:  0 1px 3px rgba(0,0,0,0.06);
}

.site-header__inner {
    display:         flex;
    align-items:     center;
    justify-content: space-between;
    height:          4rem;
    max-width:       var(--max-width);
    margin-inline:   auto;
    padding-inline:  var(--content-padding-x);
}

@media (min-width: 1024px) {
    .site-header__inner { padding-inline: 3rem; }
}

.site-header__logo a {
    font-family:     var(--font-headline);
    font-size:       1.25rem;
    font-weight:     900;
    color:           var(--color-primary);
    letter-spacing:  -0.05em;
}

/* Primary nav */
.primary-nav { display: none; }
.primary-nav ul { display: flex; align-items: center; gap: 2rem; }
.primary-nav a {
    font-family:    var(--font-headline);
    font-size:      0.85rem;
    font-weight:    500;
    letter-spacing: -0.02em;
    color:          var(--color-on-surface-variant);
    transition:     color .2s;
}
.primary-nav a:hover,
.primary-nav .current-menu-item > a { color: var(--color-primary); }
.primary-nav .current-menu-item > a {
    border-bottom: 2px solid var(--color-secondary);
    padding-bottom: 0.25rem;
}

@media (min-width: 768px) { .primary-nav { display: block; } }

.header-actions { display: flex; align-items: center; gap: 1rem; }

.x-profile-link {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    padding: 0.35rem 0.7rem;
    border-radius: var(--radius-full);
    background: var(--color-surface-container-low);
    border: 1px solid var(--color-outline-variant);
    color: var(--color-on-surface);
    font-family: var(--font-headline);
    font-size: 0.75rem;
    line-height: 1;
    font-weight: 700;
    letter-spacing: 0.02em;
    transition: border-color .2s, color .2s;
}

.x-profile-link img {
    width: 0.875em;
    height: 0.875em;
    object-fit: contain;
    border-radius: var(--radius-full);
}

.header-actions .x-profile-link img {
    width: 0.8em;
    height: 0.8em;
}

.x-profile-link:hover {
    color: var(--color-secondary);
    border-color: var(--color-secondary);
}

.header-search {
    display:         none;
    align-items:     center;
    gap:             0.25rem;
    background:      var(--color-surface-container-low);
    padding:         0.35rem 0.75rem;
    border-radius:   var(--radius);
    transition:      box-shadow .2s;
}
.header-search:focus-within {
    box-shadow: 0 0 0 2px rgba(62,92,118,0.40);
}
.header-search input {
    background:  transparent;
    border:      none;
    outline:     none;
    font-size:   0.75rem;
    width:       8rem;
    font-family: var(--font-body);
    color:       var(--color-on-surface);
}
.header-search .material-symbols-outlined { font-size: 1.1rem; color: var(--color-outline); }

@media (min-width: 640px) { .header-search { display: flex; } }

.btn-newsletter {
    background:      var(--color-primary);
    color:           var(--color-on-primary);
    padding:         0.5rem 1.25rem;
    border-radius:   var(--radius);
    font-size:       0.7rem;
    font-weight:     700;
    letter-spacing:  0.1em;
    text-transform:  uppercase;
    border:          none;
    cursor:          pointer;
    transition:      background .2s;
}
.btn-newsletter:hover { background: var(--color-primary-container); }

/* Hamburger */
.hamburger {
    display:    flex;
    flex-direction: column;
    gap:        5px;
    background: none;
    border:     none;
    cursor:     pointer;
    padding:    4px;
}
.hamburger span {
    display:       block;
    width:         24px;
    height:        2px;
    background:    var(--color-primary);
    border-radius: 2px;
    transition:    transform .25s, opacity .25s;
}
@media (min-width: 768px) { .hamburger { display: none; } }

/* Mobile nav */
.mobile-nav {
    display:    none;
    position:   fixed;
    top:        4rem;
    left:       0;
    width:      100%;
    z-index:    49;
    background: rgba(255,255,255,0.97);
    border-bottom: 1px solid var(--color-outline-variant);
    padding:    1.5rem var(--content-padding-x);
}
.mobile-nav.is-open { display: block; }
.mobile-nav ul { display: flex; flex-direction: column; gap: 1rem; }
.mobile-nav a {
    font-family: var(--font-headline);
    font-weight: 600;
    font-size:   1rem;
    color:       var(--color-on-surface);
}

.mobile-nav__social {
    margin-top: 1.2rem;
    padding-top: 1rem;
    border-top: 1px solid var(--color-outline-variant);
}

.x-profile-link--mobile {
    width: fit-content;
}

/* =========================================================
   Main Content Area
   ========================================================= */
#main-content {
    padding-top:    6rem;   /* nav offset */
    padding-bottom: 3rem;
}

/* =========================================================
   Hero Section (front page)
   ========================================================= */
.hero {
    display:       grid;
    grid-template-columns: 1fr;
    gap:           3rem;
    align-items:   center;
    margin-bottom: 6rem;
    padding-top:   1.5rem;
}

@media (min-width: 1024px) {
    .hero {
        grid-template-columns: 7fr 5fr;
    }
}

.hero__badge {
    display:       inline-block;
    padding:       0.25rem 0.75rem;
    background:    var(--color-secondary-container);
    color:         var(--color-on-secondary-container);
    font-size:     0.625rem;
    font-weight:   700;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    border-radius: var(--radius-full);
    margin-bottom: 1.5rem;
}

.hero__title {
    font-size:      3rem;
    font-weight:    900;
    color:          var(--color-primary);
    line-height:    1.2;
    letter-spacing: -0.04em;
    margin-bottom:  2rem;
}

.hero__title span { color: var(--color-secondary); }

@media (min-width: 768px) { .hero__title { font-size: 4rem; } }

.hero__desc {
    font-size:    1.125rem;
    color:        var(--color-on-surface-variant);
    max-width:    36rem;
    line-height:  1.7;
    margin-bottom: 2.5rem;
}

.hero__actions { display: flex; flex-wrap: wrap; gap: 1rem; }

.btn-primary {
    display:     inline-flex;
    align-items: center;
    gap:         0.75rem;
    background:  var(--color-primary);
    color:       var(--color-on-primary);
    padding:     1rem 2rem;
    border-radius: var(--radius);
    font-weight:   700;
    font-size:     0.85rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    transition:  box-shadow .2s;
    border:      none;
    cursor:      pointer;
}
.btn-primary:hover { box-shadow: 0 8px 24px rgba(45,62,80,0.25); }

.btn-secondary {
    display:     inline-flex;
    align-items: center;
    background:  var(--color-surface-container-highest);
    color:       var(--color-on-surface);
    padding:     1rem 2rem;
    border-radius: var(--radius);
    font-weight:   700;
    font-size:     0.85rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    transition:  background .2s;
    border:      none;
    cursor:      pointer;
}
.btn-secondary:hover { background: var(--color-surface-container-high); }

/* Hero image panel */
.hero__image-wrap {
    position:     relative;
}
.hero__image-inner {
    position:     relative;
    aspect-ratio: 1/1;
    overflow:     hidden;
    border-radius: var(--radius-xl);
    background:   var(--color-primary-container);
}
.hero__image-inner img {
    width:      100%;
    height:     100%;
    object-fit: cover;
    mix-blend-mode: overlay;
    opacity:    0.6;
}
.hero__code-block {
    position:   absolute;
    inset:      0;
    display:    flex;
    align-items: center;
    justify-content: center;
    padding:    2rem;
}
.hero__code-card {
    width:       100%;
    background:  rgba(45,62,80,0.95);
    border-radius: var(--radius);
    padding:     1.5rem;
    box-shadow:  0 24px 48px rgba(0,0,0,0.3);
    border:      1px solid rgba(255,255,255,0.05);
}
.hero__code-dots {
    display:   flex;
    gap:       0.5rem;
    margin-bottom: 1rem;
}
.hero__code-dot {
    width: 0.625rem; height: 0.625rem;
    border-radius: var(--radius-full);
}
.hero__code-dot--red   { background: rgba(176,0,32,0.8); }
.hero__code-dot--blue  { background: rgba(144,202,249,0.8); }
.hero__code-dot--grey  { background: rgba(193,199,206,0.8); }
.hero__code-card code {
    font-family: 'Courier New', Courier, monospace;
    font-size:   0.875rem;
    line-height: 1.7;
    color:       #C6E7FF;
    display:     block;
}
.hero__code-card .cm-comment  { color: var(--color-outline); }
.hero__code-card .cm-keyword  { color: #80C2FF; }
.hero__code-card .cm-string   { color: #80C2FF; }
.hero__code-card .cm-var      { color: var(--color-on-primary-container); }

/* =========================================================
   Content + Sidebar Grid
   ========================================================= */
.content-sidebar-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
}

@media (min-width: 1024px) {
    .content-sidebar-grid {
        grid-template-columns: 8fr 4fr;
    }
}

/* =========================================================
   Section Header (reusable)
   ========================================================= */
.section-header {
    display:         flex;
    align-items:     flex-end;
    justify-content: space-between;
    margin-bottom:   2rem;
    border-bottom:   1px solid var(--color-surface-container-high);
    padding-bottom:  1rem;
}
.section-header h2 {
    font-size:      1.875rem;
    font-weight:    700;
    letter-spacing: -0.04em;
    color:          var(--color-primary);
    margin:         0;
}
.section-header a {
    font-size:   0.875rem;
    font-weight: 700;
    color:       var(--color-secondary);
    display:     flex;
    align-items: center;
    gap:         0.25rem;
    transition:  text-decoration .2s;
}
.section-header a:hover { text-decoration: underline; }

/* =========================================================
   Article Cards Grid
   ========================================================= */
.posts-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

@media (min-width: 640px) {
    .posts-grid { grid-template-columns: repeat(2, 1fr); }
}

/* Card */
.card {
    background:    var(--color-surface-container-lowest);
    border-radius: var(--radius-xl);
    padding:       1.5rem;
    transition:    box-shadow .3s;
}
.card:hover { box-shadow: 0 4px 20px rgba(0,0,0,0.08); }

.card__thumbnail {
    aspect-ratio:  16/9;
    overflow:      hidden;
    border-radius: var(--radius);
    background:    var(--color-surface-container);
    margin-bottom: 1.5rem;
}
.card__thumbnail img {
    width:      100%;
    height:     100%;
    object-fit: cover;
    transition: transform .5s;
}
.card:hover .card__thumbnail img { transform: scale(1.05); }

.card__tags { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 1rem; }
.card__tag {
    font-size:     0.625rem;
    font-weight:   700;
    padding:       0.2rem 0.5rem;
    border-radius: var(--radius-sm);
    letter-spacing: 0.05em;
}
.card__tag--primary { color: var(--color-secondary); background: rgba(144,202,249,0.25); }
.card__tag--tertiary { color: var(--color-tertiary); background: rgba(202,213,224,0.35); }
.card__tag--new { color: var(--color-error); background: rgba(245,222,220,0.5); }

.card__title {
    font-size:    1.25rem;
    font-weight:  700;
    color:        var(--color-primary);
    margin-bottom: 0.75rem;
    line-height:  1.3;
    transition:   color .2s;
}
.card:hover .card__title { color: var(--color-secondary); }

.card__excerpt {
    font-size:   0.875rem;
    color:       var(--color-on-surface-variant);
    line-height: 1.7;
    margin-bottom: 1.5rem;
}

.card__meta {
    display:       flex;
    align-items:   center;
    gap:           0.75rem;
    padding-top:   1.5rem;
    border-top:    1px solid var(--color-surface-container);
    margin-top:    auto;
}
.card__avatar {
    width:           2rem;
    height:          2rem;
    border-radius:   var(--radius-full);
    background:      var(--color-primary-container);
    color:           #fff;
    font-size:       0.625rem;
    font-weight:     700;
    display:         flex;
    align-items:     center;
    justify-content: center;
    flex-shrink:     0;
    overflow:        hidden;
}
.card__avatar img { width: 100%; height: 100%; object-fit: cover; }
.card__byline {
    font-size:      0.625rem;
    font-weight:    700;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color:          var(--color-outline);
}

/* Featured card (2-col span) */
.card--featured {
    grid-column: 1 / -1;
    display:     grid;
    gap:         2rem;
}
@media (min-width: 640px) {
    .card--featured { grid-template-columns: 1fr 1fr; }
    .card--featured .card__thumbnail { aspect-ratio: 1/1; }
}
.card--featured .card__body {
    display:        flex;
    flex-direction: column;
    justify-content: center;
}
.card--featured .card__title { font-size: 1.875rem; }
.card--featured .card__excerpt { font-size: 1rem; }

/* =========================================================
   Sidebar
   ========================================================= */
.sidebar { display: flex; flex-direction: column; gap: 3rem; }

.sidebar__widget {
    background:    var(--color-surface-container-low);
    border-radius: var(--radius-xl);
    padding:       2rem;
}

.sidebar__widget-title {
    font-size:      0.75rem;
    font-weight:    700;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color:          var(--color-primary);
    border-bottom:  1px solid rgba(193,199,206,0.30);
    padding-bottom: 0.5rem;
    margin-bottom:  1.5rem;
}

/* Tag cloud */
.tag-cloud { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.tag-cloud a {
    padding:       0.375rem 0.75rem;
    background:    var(--color-surface-container-lowest);
    font-size:     0.75rem;
    font-weight:   500;
    color:         var(--color-on-surface-variant);
    border-radius: var(--radius-sm);
    transition:    background .2s, color .2s;
}
.tag-cloud a:hover {
    background: var(--color-secondary-container);
    color:      var(--color-on-secondary-container);
}

/* Newsletter widget */
.sidebar__widget--newsletter {
    background: var(--color-primary);
    color:      var(--color-on-primary);
    position:   relative;
    overflow:   hidden;
}
.sidebar__widget--newsletter .sidebar__widget-title { color: var(--color-on-primary); border-color: rgba(255,255,255,0.15); }
.newsletter-icon { font-size: 2.5rem; color: var(--color-secondary-container); margin-bottom: 1rem; }
.newsletter-heading {
    font-size:      1.5rem;
    font-weight:    700;
    letter-spacing: -0.04em;
    margin-bottom:  1rem;
    color:          var(--color-on-primary);
}
.newsletter-desc {
    font-size:   0.875rem;
    color:       var(--color-on-primary-container);
    line-height: 1.6;
    margin-bottom: 2rem;
}
.newsletter-form { display: flex; flex-direction: column; gap: 1rem; }
.newsletter-input {
    background:    var(--color-primary-container);
    border:        none;
    border-radius: var(--radius);
    padding:       0.75rem 1rem;
    font-size:     0.875rem;
    color:         #fff;
    font-family:   var(--font-body);
    outline:       none;
    transition:    box-shadow .2s;
}
.newsletter-input::placeholder { color: var(--color-on-primary-container); }
.newsletter-input:focus { box-shadow: 0 0 0 2px rgba(144,202,249,0.5); }
.btn-subscribe {
    background:    var(--color-secondary-container);
    color:         var(--color-on-secondary-container);
    border:        none;
    padding:       0.75rem;
    border-radius: var(--radius);
    font-weight:   700;
    font-size:     0.75rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    cursor:        pointer;
    font-family:   var(--font-headline);
    transition:    filter .2s;
}
.btn-subscribe:hover { filter: brightness(1.07); }
.newsletter-note {
    font-size:  0.625rem;
    color:      rgba(160,179,193,0.60);
    text-align: center;
    margin-top: 1rem;
}

/* Editorial quote widget */
.sidebar__widget--quote {
    background: var(--color-surface-container-lowest);
    border:     1px solid rgba(193,199,206,0.40);
}
.editorial-quote {
    font-size:   0.875rem;
    font-style:  italic;
    color:       var(--color-on-surface-variant);
    line-height: 1.7;
}

/* Recent posts widget */
.recent-posts__list { display: flex; flex-direction: column; gap: 1rem; }
.recent-posts__item { display: flex; gap: 1rem; align-items: flex-start; }
.recent-posts__thumb {
    width:         4rem;
    height:        4rem;
    border-radius: var(--radius-sm);
    overflow:      hidden;
    flex-shrink:   0;
    background:    var(--color-surface-container);
}
.recent-posts__thumb img { width: 100%; height: 100%; object-fit: cover; }
.recent-posts__title {
    font-size:    0.8125rem;
    font-weight:  600;
    color:        var(--color-primary);
    line-height:  1.4;
    margin-bottom: 0.25rem;
}
.recent-posts__date { font-size: 0.7rem; color: var(--color-outline); }

/* =========================================================
   Pagination
   ========================================================= */
.pagination {
    display:     flex;
    flex-wrap:   wrap;
    gap:         0.5rem;
    margin-top:  3rem;
}
.pagination .page-numbers {
    display:       inline-flex;
    align-items:   center;
    justify-content: center;
    min-width:     2.5rem;
    height:        2.5rem;
    padding:       0 0.75rem;
    border-radius: var(--radius);
    font-weight:   700;
    font-size:     0.875rem;
    background:    var(--color-surface-container-lowest);
    color:         var(--color-on-surface);
    transition:    background .2s, color .2s;
    border:        1px solid var(--color-outline-variant);
}
.pagination .page-numbers.current,
.pagination .page-numbers:hover {
    background: var(--color-primary);
    color:      var(--color-on-primary);
    border-color: var(--color-primary);
}

/* =========================================================
   Single Post
   ========================================================= */
/* Single article layout (article.html inspired) */
.single-article-shell {
    width: 100%;
    display: flex;
    justify-content: center;
}

.single-article {
    width: min(100%, 800px);
    margin-inline: auto;
}

.site-breadcrumb,
.single-article__breadcrumb {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 2rem;
    font-family: var(--font-headline);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-on-surface-variant);
}
.site-breadcrumb a,
.single-article__breadcrumb a {
    transition: color .2s;
}
.site-breadcrumb a:hover,
.single-article__breadcrumb a:hover {
    color: var(--color-primary);
}
.site-breadcrumb .material-symbols-outlined,
.single-article__breadcrumb .material-symbols-outlined {
    font-size: 0.875rem;
}
.site-breadcrumb__current,
.single-article__breadcrumb-current {
    color: var(--color-secondary);
    font-weight: 700;
}

.single-article__header {
    margin-bottom: 3rem;
}

.single-article__title {
    font-family: var(--font-body);
    font-size: 3rem;
    line-height: 1.1;
    letter-spacing: -0.04em;
    font-weight: 900;
    color: var(--color-primary);
    margin: 0 0 2rem;
}

.single-article__featured-image {
    aspect-ratio: 16 / 9;
    overflow: hidden;
    border-radius: var(--radius-xl);
    margin-bottom: 2.5rem;
    background: var(--color-surface-container);
}
.single-article__featured-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.entry-content--article {
    max-width: none;
}
.entry-content--article p {
    font-size: 1.125rem;
    line-height: 1.85;
    color: var(--color-on-surface-variant);
    margin-bottom: 2rem;
}
.entry-content--article > p:first-child {
    font-size: 1.25rem;
    color: var(--color-on-surface);
}
.entry-content--article h2 {
    font-family: var(--font-body);
    font-size: 2rem;
    font-weight: 900;
    margin-top: 3.5rem;
    margin-bottom: 1.25rem;
    color: var(--color-primary);
}
.entry-content--article h3 {
    font-family: var(--font-body);
    font-size: 1.4rem;
    font-weight: 800;
    margin-top: 2.5rem;
}
.entry-content--article pre {
    background: var(--color-primary);
    color: var(--color-on-primary);
    border-radius: var(--radius-xl);
    padding: 1.5rem;
    box-shadow: 0 18px 36px rgba(45,62,80,0.24);
}
.entry-content--article pre code {
    font-family: 'JetBrains Mono', 'Courier New', Courier, monospace;
}
.entry-content--article blockquote {
    background: var(--color-surface-container-low);
    border-left: 4px solid var(--color-secondary);
    border-radius: 0 var(--radius) var(--radius) 0;
}

.single-article__tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 4rem;
    padding-top: 2rem;
    border-top: 1px solid rgba(193,199,206,0.3);
}
.single-article__tags a {
    padding: 0.4rem 1rem;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    background: var(--color-surface-container-high);
    color: var(--color-primary);
    transition: background .2s;
}
.single-article__tags a:hover {
    background: var(--color-surface-container);
}

.single-article__pager {
    margin-top: 5rem;
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}
@media (min-width: 768px) {
    .single-article__pager {
        grid-template-columns: 1fr 1fr;
    }
}

.single-article__pager-card {
    display: block;
    padding: 2rem;
    border-radius: var(--radius);
    background: var(--color-surface-container-low);
    border: 1px solid rgba(193,199,206,0.15);
    transition: background .2s, border-color .2s;
}
.single-article__pager-card:hover {
    background: var(--color-surface-container);
    border-color: rgba(193,199,206,0.35);
}
.single-article__pager-kicker {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    font-family: var(--font-headline);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--color-secondary);
    margin-bottom: 0.75rem;
}
.single-article__pager-title {
    font-size: 1.125rem;
    font-family: var(--font-headline);
    font-weight: 700;
    color: var(--color-primary);
    transition: color .2s;
}
.single-article__pager-card:hover .single-article__pager-title {
    color: var(--color-secondary);
}
.single-article__pager-card--next {
    text-align: right;
}

.single-article__pager:has(.single-article__pager-card:only-child) .single-article__pager-card {
    max-width: 100%;
}

.single-article .comments-area {
    margin-top: 3rem;
}

.single-post__header { margin-bottom: 2.5rem; }

.single-post__tags { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 1.5rem; }

.single-post__title {
    font-size:      2.5rem;
    font-weight:    900;
    letter-spacing: -0.04em;
    line-height:    1.1;
    margin-bottom:  1.5rem;
    margin-top:     0;
}

.single-post__meta {
    display:     flex;
    align-items: center;
    gap:         1rem;
    flex-wrap:   wrap;
}
.single-post__author { display: flex; align-items: center; gap: 0.75rem; }
.single-post__author-avatar {
    width:           2.5rem;
    height:          2.5rem;
    border-radius:   var(--radius-full);
    background:      var(--color-primary-container);
    overflow:        hidden;
}
.single-post__author-avatar img { width: 100%; height: 100%; object-fit: cover; }
.single-post__author-name { font-weight: 700; font-size: 0.875rem; color: var(--color-primary); }
.single-post__date-read {
    font-size:      0.7rem;
    color:          var(--color-outline);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-weight:    700;
}

.single-post__featured-image {
    aspect-ratio:  16 / 9;
    overflow:      hidden;
    border-radius: var(--radius-xl);
    margin-bottom: 2.5rem;
    background:    var(--color-surface-container);
}
.single-post__featured-image img { width: 100%; height: 100%; object-fit: cover; }

/* Article body */
.entry-content {
    font-size:   1rem;
    line-height: 1.85;
    color:       var(--color-on-surface);
}
.entry-content h2 { font-size: 1.6rem; margin: 2.5rem 0 1rem; }
.entry-content h3 { font-size: 1.3rem; margin: 2rem 0 0.8rem; }
.entry-content p  { margin-bottom: 1.5em; }
.entry-content a  { color: var(--color-secondary); text-decoration: underline; text-decoration-color: rgba(62,92,118,0.35); transition: text-decoration-color .2s; }
.entry-content a:hover { text-decoration-color: var(--color-secondary); }
.entry-content ul,
.entry-content ol { padding-left: 1.5rem; margin-bottom: 1.5em; }
.entry-content ul { list-style: disc; }
.entry-content ol { list-style: decimal; }
.entry-content li { margin-bottom: 0.5em; }
.entry-content blockquote {
    border-left:  4px solid var(--color-secondary-container);
    padding:      1rem 1.5rem;
    margin:       2rem 0;
    background:   var(--color-surface-container-low);
    border-radius: 0 var(--radius) var(--radius) 0;
    font-style:   italic;
    color:        var(--color-on-surface-variant);
}
.entry-content code {
    background:    var(--color-surface-container-high);
    padding:       0.15em 0.45em;
    border-radius: var(--radius-sm);
    font-size:     0.9em;
    font-family:   'Courier New', Courier, monospace;
}
.entry-content pre {
    background:    var(--color-inverse-surface);
    color:         var(--color-inverse-on-surface);
    padding:       1.5rem;
    border-radius: var(--radius);
    overflow-x:    auto;
    margin-bottom: 1.5em;
}
.entry-content pre code {
    background: none;
    padding:    0;
    font-size:  0.875rem;
}
.entry-content img {
    border-radius: var(--radius);
    margin: 1.5rem 0;
}
.entry-content table { width: 100%; border-collapse: collapse; margin-bottom: 1.5em; }
.entry-content th,
.entry-content td { border: 1px solid var(--color-outline-variant); padding: 0.75rem 1rem; font-size: 0.875rem; }
.entry-content th { background: var(--color-surface-container-low); font-weight: 700; }
.entry-content figure { margin: 1.5rem 0; }
.entry-content figcaption { font-size: 0.8rem; color: var(--color-outline); margin-top: 0.5rem; text-align: center; }

/* Post footer */
.single-post__footer { margin-top: 3rem; padding-top: 2rem; border-top: 1px solid var(--color-outline-variant); }
.post-tags__label { font-weight: 700; font-size: 0.8rem; color: var(--color-outline); margin-right: 0.5rem; }
.post-tags__list { display: inline-flex; flex-wrap: wrap; gap: 0.5rem; }
.post-tags__list a {
    padding:       0.25rem 0.75rem;
    background:    var(--color-surface-container-low);
    border-radius: var(--radius-full);
    font-size:     0.75rem;
    color:         var(--color-on-surface-variant);
    transition:    background .2s;
}
.post-tags__list a:hover { background: var(--color-secondary-container); color: var(--color-on-secondary-container); }

/* Comments */
.comments-area { margin-top: 3rem; }

/* =========================================================
   Page (static page)
   ========================================================= */
.page-content { max-width: 72ch; }
.page-header { margin-bottom: 2.5rem; }
.page-title {
    font-size:      2.5rem;
    font-weight:    900;
    letter-spacing: -0.04em;
    margin-bottom:  1rem;
    margin-top:     0;
}

/* =========================================================
   Site Footer
   ========================================================= */
.site-footer {
    background:    var(--color-surface-container-low);
    border-top:    1px solid rgba(193,199,206,0.20);
    padding:       3rem var(--content-padding-x);
    margin-top:    6rem;
}
.site-footer__inner {
    max-width:     var(--max-width);
    margin-inline: auto;
    display:       grid;
    grid-template-columns: 1fr;
    gap:           2rem;
    align-items:   center;
}
@media (min-width: 768px) {
    .site-footer__inner { grid-template-columns: 1fr 1fr; }
    .footer-links { justify-content: flex-end; }
}

.footer-brand {
    font-family: var(--font-headline);
    font-weight: 700;
    font-size:   1.125rem;
    color:       var(--color-primary);
    margin-bottom: 0.75rem;
}
.footer-copy {
    font-size:   0.875rem;
    color:       var(--color-on-surface-variant);
    max-width:   28rem;
}

.footer-links {
    display:   flex;
    flex-wrap: wrap;
    gap:       1rem 2rem;
}
.footer-links a {
    font-size:  0.875rem;
    color:      var(--color-on-surface-variant);
    transition: color .2s;
}
.footer-links a:hover { color: var(--color-secondary); }

.footer-x-link {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    font-weight: 700;
}

.footer-x-link img {
    width: 0.875em;
    height: 0.875em;
    object-fit: contain;
    border-radius: var(--radius-full);
}

/* =========================================================
   404 Page
   ========================================================= */
.error-404 {
    text-align:   center;
    padding:      6rem 0;
}
.error-404__code {
    font-size:      8rem;
    font-weight:    900;
    letter-spacing: -0.05em;
    color:          var(--color-surface-container-highest);
    line-height:    1;
    margin-bottom:  1rem;
}
.error-404__title { color: var(--color-primary); margin-bottom: 1rem; }
.error-404__desc  { color: var(--color-on-surface-variant); margin-bottom: 2.5rem; }

/* =========================================================
   Search results
   ========================================================= */
.search-results-header { margin-bottom: 2rem; }

/* =========================================================
   Accessibility
   ========================================================= */
.screen-reader-text {
    position:  absolute;
    clip:      rect(1px, 1px, 1px, 1px);
    overflow:  hidden;
    height:    1px;
    width:     1px;
    word-wrap: normal;
}
.skip-to-content {
    position:   absolute;
    left:       -999px;
    background: var(--color-primary);
    color:      var(--color-on-primary);
    padding:    0.75rem 1.5rem;
    border-radius: 0 0 var(--radius) var(--radius);
    font-weight: 700;
    z-index:    100;
    transition: left 0s;
}
.skip-to-content:focus { left: 1rem; }

/* =========================================================
   Responsive: large screens
   ========================================================= */
@media (min-width: 1024px) {
    .site-header__inner,
    .site-container { padding-inline: 3rem; }
    .site-footer { padding-inline: 3rem; }
}

/* =========================================================
   Responsive: small screens
   ========================================================= */
@media (max-width: 768px) {
    html { font-size: 15px; }
    h1   { font-size: 1.6rem; }
    h2   { font-size: 1.4rem; }
    .hero__title { font-size: 2.25rem; }
    .single-post__title { font-size: 1.75rem; }
    .page-title { font-size: 1.75rem; }
}

/* =========================================================
   Article Meta Information (SEO Enhancement)
   ========================================================= */
.single-article__meta {
    margin-top: 1.5rem;
    padding: 1.5rem;
    background: var(--color-surface-container-low);
    border-radius: var(--radius);
}

.single-article__meta-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.single-article__author-info {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.single-article__author-avatar {
    width: 3rem;
    height: 3rem;
    border-radius: var(--radius-full);
    overflow: hidden;
    flex-shrink: 0;
    background: var(--color-primary-container);
}

.single-article__author-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.single-article__author-details {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.single-article__author-name {
    font-weight: 700;
    font-size: 0.875rem;
    color: var(--color-primary);
}

.single-article__author-name a {
    color: var(--color-secondary);
    text-decoration: none;
}

.single-article__author-name a:hover {
    text-decoration: underline;
}

.single-article__dates {
    font-size: 0.75rem;
    color: var(--color-outline);
    display: flex;
    gap: 0.5rem;
}

.single-article__updated {
    color: var(--color-on-surface-variant);
}

.single-article__reading-time {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--color-outline);
    white-space: nowrap;
}

@media (max-width: 640px) {
    .single-article__meta-row {
        flex-direction: column;
        align-items: flex-start;
    }
    .single-article__reading-time {
        align-self: flex-start;
    }
}

/* =========================================================
   Related Articles Section
   ========================================================= */
.single-article__related {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 2px solid var(--color-surface-container-highest);
}

.single-article__related-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 1.5rem;
    letter-spacing: -0.02em;
}

.single-article__related-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}

@media (min-width: 640px) {
    .single-article__related-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* Article Card */
.article-card {
    background: var(--color-surface-container-lowest);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: box-shadow .2s, transform .2s;
}

.article-card:hover {
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
    transform: translateY(-2px);
}

.article-card__image {
    aspect-ratio: 16/9;
    overflow: hidden;
    background: var(--color-surface-container);
}

.article-card__image a {
    display: block;
    width: 100%;
    height: 100%;
}

.article-card__image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform .3s;
}

.article-card:hover .article-card__image img {
    transform: scale(1.05);
}

.article-card__content {
    padding: 1rem;
    display: flex;
    flex-direction: column;
}

.article-card__title {
    font-size: 0.9375rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 0.5rem;
    line-height: 1.3;
}

.article-card__title a {
    color: inherit;
    text-decoration: none;
}

.article-card__title a:hover {
    color: var(--color-secondary);
}

.article-card__excerpt {
    font-size: 0.8125rem;
    color: var(--color-on-surface-variant);
    line-height: 1.5;
    margin-bottom: 0.75rem;
    flex-grow: 1;
}

.article-card__meta {
    font-size: 0.75rem;
    color: var(--color-outline);
    border-top: 1px solid var(--color-surface-container-highest);
    padding-top: 0.75rem;
}