/*
Theme Name: ChiNamed Medical
Theme URI: https://yoursite.com
Author: Your Name
Author URI: https://yoursite.com
Description: 专业中医健康资讯网站主题，支持多语言（中文/英文/繁体中文/粤语）。Professional TCM health website theme with multilingual support.
Version: 1.0.0
Requires at least: 6.0
Tested up to: 6.5
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: chinamed
Tags: blog, health, medical, multilingual, rtl-language-support, responsive-layout
*/

/* ============================================================
   CSS CUSTOM PROPERTIES
   ============================================================ */
:root {
  --color-primary:        #2E6B4F;  /* Deep herb green */
  --color-primary-light:  #3D8A63;
  --color-primary-dark:   #1E4D38;
  --color-secondary:      #C8821A;  /* Warm gold */
  --color-secondary-light:#E09B30;
  --color-accent:         #8B2635;  /* Deep red - TCM */
  --color-bg:             #FAFAF7;
  --color-bg-alt:         #F3F0EB;
  --color-surface:        #FFFFFF;
  --color-border:         #E4DDD3;
  --color-text:           #1A1A1A;
  --color-text-muted:     #6B6560;
  --color-text-light:     #9E9892;

  --font-display:  'Noto Serif SC', 'Source Han Serif SC', Georgia, serif;
  --font-body:     'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-en:       'Cormorant Garamond', Georgia, serif;

  --radius-sm:   4px;
  --radius-md:   8px;
  --radius-lg:   16px;
  --radius-xl:   24px;

  --shadow-sm:   0 1px 3px rgba(0,0,0,.06);
  --shadow-md:   0 4px 16px rgba(0,0,0,.08);
  --shadow-lg:   0 8px 32px rgba(0,0,0,.12);

  --transition:  all 0.25s ease;
  --max-width:   1200px;
  --header-h:    72px;
}

/* ============================================================
   RESET & BASE
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-body);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--color-primary-light); }
ul, ol { list-style: none; }
button, input, select, textarea { font-family: inherit; }

/* ============================================================
   TYPOGRAPHY
   ============================================================ */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.3;
  color: var(--color-text);
}
h1 { font-size: clamp(2rem, 4vw, 3rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.25rem); }
h3 { font-size: clamp(1.2rem, 2vw, 1.5rem); }
h4 { font-size: 1.2rem; }
p { margin-bottom: 1.2em; }
.lang-en h1, .lang-en h2, .lang-en h3 { font-family: var(--font-en); }

/* ============================================================
   LAYOUT
   ============================================================ */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}
.grid-sidebar {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 48px;
  align-items: start;
}
@media (max-width: 960px) {
  .grid-sidebar { grid-template-columns: 1fr; }
}

/* ============================================================
   HEADER
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  height: var(--header-h);
  display: flex;
  align-items: center;
  box-shadow: var(--shadow-sm);
}
.site-header .container {
  display: flex;
  align-items: center;
  width: 100%;
}
.site-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}
.site-logo img { height: 44px; width: auto; }
.site-logo-text .site-name {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0.02em;
  display: block;
}
.site-logo-text .site-tagline {
  font-size: 0.72rem;
  color: var(--color-text-muted);
  letter-spacing: 0.05em;
}

/* Primary Navigation */
.main-nav { margin-left: auto; display: flex; align-items: center; gap: 4px; }
.main-nav ul { display: flex; align-items: center; gap: 2px; }
.main-nav > ul > li { position: relative; }
.main-nav > ul > li > a {
  display: block;
  padding: 8px 14px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text);
  border-radius: var(--radius-sm);
  transition: var(--transition);
}
.main-nav > ul > li > a:hover,
.main-nav > ul > li.current-menu-item > a {
  background: var(--color-bg-alt);
  color: var(--color-primary);
}
/* Dropdown */
.main-nav .sub-menu {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  min-width: 180px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: var(--transition);
}
.main-nav li:hover .sub-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.main-nav .sub-menu li a {
  display: block;
  padding: 10px 16px;
  font-size: 0.85rem;
  color: var(--color-text);
  border-bottom: 1px solid var(--color-border);
}
.main-nav .sub-menu li:last-child a { border-bottom: none; }
.main-nav .sub-menu li a:hover { background: var(--color-bg-alt); color: var(--color-primary); }

/* Language switcher in header */
.lang-switcher {
  display: flex;
  align-items: center;
  gap: 2px;
  margin-left: 16px;
  background: var(--color-bg-alt);
  border-radius: var(--radius-md);
  padding: 3px;
}
.lang-switcher a {
  padding: 5px 10px;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-text-muted);
  border-radius: 6px;
  transition: var(--transition);
}
.lang-switcher a.active,
.lang-switcher a:hover {
  background: var(--color-primary);
  color: white;
}

/* Search icon */
.header-search-btn {
  background: none;
  border: none;
  padding: 8px;
  cursor: pointer;
  color: var(--color-text-muted);
  margin-left: 8px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}
.header-search-btn:hover { background: var(--color-bg-alt); color: var(--color-primary); }

/* Mobile hamburger */
.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  color: var(--color-text);
}
@media (max-width: 768px) {
  .main-nav, .lang-switcher, .header-search-btn { display: none; }
  .mobile-menu-toggle { display: flex; margin-left: auto; }
}

/* ============================================================
   HERO / PAGE BANNER
   ============================================================ */
.page-banner {
  background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 60%, var(--color-primary-light) 100%);
  padding: 64px 0 48px;
  position: relative;
  overflow: hidden;
}
.page-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.04'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}
.page-banner .container { position: relative; }
.page-banner h1 {
  color: white;
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  margin-bottom: 12px;
}
.page-banner p { color: rgba(255,255,255,0.8); font-size: 1rem; max-width: 560px; margin-bottom: 0; }
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
  font-size: 0.8rem;
  color: rgba(255,255,255,0.6);
}
.breadcrumb a { color: rgba(255,255,255,0.7); }
.breadcrumb a:hover { color: white; }
.breadcrumb span.sep { opacity: 0.4; }

/* ============================================================
   BLOG ARCHIVE
   ============================================================ */
.blog-page { padding: 56px 0 80px; }

/* Category Filter Bar */
.category-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 40px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--color-border);
}
.cat-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 16px;
  border-radius: 100px;
  font-size: 0.825rem;
  font-weight: 500;
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  background: var(--color-surface);
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
}
.cat-pill:hover { border-color: var(--color-primary); color: var(--color-primary); }
.cat-pill.active { background: var(--color-primary); border-color: var(--color-primary); color: white; }
.cat-pill .count {
  font-size: 0.7rem;
  background: rgba(255,255,255,0.2);
  padding: 1px 6px;
  border-radius: 10px;
}
.cat-pill:not(.active) .count { background: var(--color-bg-alt); color: var(--color-text-muted); }

/* Post Grid */
.posts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 28px;
  margin-bottom: 48px;
}

/* Featured post (first) */
.post-card-featured {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-surface);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-border);
}
@media (max-width: 640px) {
  .post-card-featured { grid-template-columns: 1fr; }
  .posts-grid { grid-template-columns: 1fr; }
}
.post-card-featured .card-img {
  aspect-ratio: 16/9;
  object-fit: cover;
  width: 100%;
  height: 100%;
}
.post-card-featured .card-body { padding: 36px; display: flex; flex-direction: column; justify-content: center; }

/* Regular cards */
.post-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}
.post-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary);
}
.card-img-wrap { overflow: hidden; aspect-ratio: 16/9; }
.card-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.post-card:hover .card-img-wrap img { transform: scale(1.04); }
.card-body { padding: 22px; flex: 1; display: flex; flex-direction: column; }

.card-category {
  display: inline-flex;
  align-items: center;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-primary);
  margin-bottom: 10px;
}
.card-category .dot { width: 5px; height: 5px; background: currentColor; border-radius: 50%; margin-right: 6px; }

.card-title {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: 10px;
  color: var(--color-text);
  transition: var(--transition);
}
.post-card:hover .card-title { color: var(--color-primary); }
.post-card-featured .card-title { font-size: 1.6rem; margin-bottom: 14px; }

.card-excerpt {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.65;
  margin-bottom: 16px;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 14px;
  border-top: 1px solid var(--color-border);
  margin-top: auto;
}
.card-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.78rem;
  color: var(--color-text-light);
}
.card-meta .author {
  display: flex;
  align-items: center;
  gap: 6px;
}
.card-meta .author img {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  object-fit: cover;
}
.card-read-more {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-primary);
  display: flex;
  align-items: center;
  gap: 4px;
}
.card-read-more::after { content: '→'; transition: transform 0.2s; }
.post-card:hover .card-read-more::after { transform: translateX(4px); }

/* Language availability badges */
.card-langs {
  display: flex;
  gap: 4px;
  margin-bottom: 12px;
}
.lang-dot {
  width: 22px;
  height: 16px;
  border-radius: 3px;
  font-size: 9px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg-alt);
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
}
.lang-dot.available { background: var(--color-primary); color: white; border-color: var(--color-primary); }

/* ============================================================
   SIDEBAR
   ============================================================ */
.sidebar { position: sticky; top: calc(var(--header-h) + 24px); }
.widget {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 24px;
}
.widget-title {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-primary);
  padding-bottom: 12px;
  margin-bottom: 16px;
  border-bottom: 2px solid var(--color-primary);
  display: flex;
  align-items: center;
  gap: 8px;
}
/* Search widget */
.search-form { display: flex; gap: 0; }
.search-form input {
  flex: 1;
  padding: 10px 14px;
  border: 1px solid var(--color-border);
  border-right: none;
  border-radius: var(--radius-md) 0 0 var(--radius-md);
  font-size: 0.875rem;
  outline: none;
  background: var(--color-bg);
  transition: var(--transition);
}
.search-form input:focus { border-color: var(--color-primary); }
.search-form button {
  padding: 10px 16px;
  background: var(--color-primary);
  color: white;
  border: none;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  cursor: pointer;
  transition: var(--transition);
}
.search-form button:hover { background: var(--color-primary-dark); }

/* Popular posts widget */
.popular-post {
  display: flex;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--color-border);
}
.popular-post:last-child { border-bottom: none; padding-bottom: 0; }
.popular-post img {
  width: 70px;
  height: 52px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
}
.popular-post-title {
  font-size: 0.85rem;
  font-weight: 500;
  line-height: 1.4;
  color: var(--color-text);
  transition: var(--transition);
}
.popular-post-title:hover { color: var(--color-primary); }
.popular-post-date { font-size: 0.75rem; color: var(--color-text-light); margin-top: 4px; }

/* Category widget */
.cat-list li a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 0;
  font-size: 0.875rem;
  color: var(--color-text);
  border-bottom: 1px solid var(--color-border);
}
.cat-list li:last-child a { border-bottom: none; }
.cat-list li a:hover { color: var(--color-primary); padding-left: 6px; }
.cat-list .count { background: var(--color-bg-alt); font-size: 0.75rem; padding: 2px 8px; border-radius: 10px; }

/* Tag cloud */
.tag-cloud { display: flex; flex-wrap: wrap; gap: 6px; }
.tag-cloud a {
  padding: 5px 12px;
  border: 1px solid var(--color-border);
  border-radius: 100px;
  font-size: 0.78rem;
  color: var(--color-text-muted);
  transition: var(--transition);
}
.tag-cloud a:hover { background: var(--color-primary); color: white; border-color: var(--color-primary); }

/* ============================================================
   SINGLE POST
   ============================================================ */
.single-post { padding: 56px 0 80px; }
.post-header { margin-bottom: 36px; }
.post-category-label {
  display: inline-block;
  background: var(--color-primary);
  color: white;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 5px 14px;
  border-radius: 100px;
  margin-bottom: 16px;
}
.post-title {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  line-height: 1.25;
  margin-bottom: 20px;
}
.post-info {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 20px;
  padding: 16px 0;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  font-size: 0.85rem;
  color: var(--color-text-muted);
}
.post-info .author-card {
  display: flex;
  align-items: center;
  gap: 10px;
}
.post-info .author-card img {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 2px solid var(--color-border);
}
.post-featured-img {
  margin: 28px 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 21/9;
}
.post-featured-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Language selector on post */
.post-lang-selector {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 10px 16px;
  margin-bottom: 28px;
  flex-wrap: wrap;
}
.post-lang-selector span { font-size: 0.8rem; color: var(--color-text-muted); margin-right: 4px; }
.post-lang-btn {
  padding: 5px 14px;
  border-radius: 6px;
  font-size: 0.8rem;
  font-weight: 600;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text-muted);
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 5px;
}
.post-lang-btn.active { background: var(--color-primary); color: white; border-color: var(--color-primary); }
.post-lang-btn:hover:not(.active) { border-color: var(--color-primary); color: var(--color-primary); }

/* Post Content */
.post-content {
  font-size: 1.025rem;
  line-height: 1.85;
  color: #2a2a2a;
}
.post-content h2 {
  margin: 2em 0 0.8em;
  padding-bottom: 0.5em;
  border-bottom: 2px solid var(--color-border);
  color: var(--color-primary-dark);
}
.post-content h3 { margin: 1.8em 0 0.6em; color: var(--color-primary); }
.post-content p { margin-bottom: 1.4em; }
.post-content ul, .post-content ol {
  padding-left: 1.5em;
  margin-bottom: 1.4em;
  list-style: disc;
}
.post-content li { margin-bottom: 0.5em; }
.post-content blockquote {
  border-left: 4px solid var(--color-primary);
  background: var(--color-bg-alt);
  padding: 20px 24px;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin: 2em 0;
  font-style: italic;
  color: var(--color-text-muted);
}
.post-content img {
  border-radius: var(--radius-md);
  margin: 2em 0;
  box-shadow: var(--shadow-md);
}
.post-content a { color: var(--color-primary); text-decoration: underline; }
.post-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 2em 0;
}
.post-content th {
  background: var(--color-primary);
  color: white;
  padding: 10px 16px;
  text-align: left;
  font-size: 0.875rem;
}
.post-content td {
  padding: 10px 16px;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.9rem;
}
.post-content tr:nth-child(even) td { background: var(--color-bg-alt); }

/* Medical disclaimer box */
.medical-disclaimer {
  background: #FFF8E6;
  border: 1px solid #F5C842;
  border-left: 4px solid #C8821A;
  border-radius: var(--radius-md);
  padding: 16px 20px;
  margin: 2em 0;
  font-size: 0.85rem;
  color: #7A5B00;
}
.medical-disclaimer strong { color: #C8821A; }

/* ============================================================
   PAGINATION
   ============================================================ */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 6px;
  padding-top: 20px;
}
.pagination a, .pagination span {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 500;
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  transition: var(--transition);
}
.pagination a:hover { background: var(--color-primary); color: white; border-color: var(--color-primary); }
.pagination .current { background: var(--color-primary); color: white; border-color: var(--color-primary); }

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer {
  background: var(--color-primary-dark);
  color: rgba(255,255,255,0.7);
  padding: 56px 0 24px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}
@media (max-width: 768px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 480px) {
  .footer-grid { grid-template-columns: 1fr; }
}
.footer-brand .logo-text {
  font-family: var(--font-display);
  font-size: 1.4rem;
  color: white;
  font-weight: 700;
  margin-bottom: 12px;
}
.footer-brand p { font-size: 0.875rem; line-height: 1.7; margin-bottom: 20px; }
.footer-socials { display: flex; gap: 10px; }
.social-icon {
  width: 36px;
  height: 36px;
  background: rgba(255,255,255,0.1);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,0.6);
  font-size: 0.85rem;
  transition: var(--transition);
}
.social-icon:hover { background: var(--color-secondary); color: white; }
.footer-col-title {
  font-size: 0.875rem;
  font-weight: 700;
  color: white;
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.footer-links li { margin-bottom: 10px; }
.footer-links a {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.55);
  transition: var(--transition);
}
.footer-links a:hover { color: white; padding-left: 4px; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.8rem;
}
.footer-lang-links { display: flex; gap: 16px; }
.footer-lang-links a { color: rgba(255,255,255,0.4); font-size: 0.78rem; }
.footer-lang-links a:hover { color: rgba(255,255,255,0.8); }

/* ============================================================
   COMPONENTS
   ============================================================ */

/* Notification bar */
.notice-bar {
  background: var(--color-secondary);
  color: white;
  text-align: center;
  padding: 8px 24px;
  font-size: 0.8rem;
}
.notice-bar a { color: white; text-decoration: underline; }

/* Newsletter CTA */
.newsletter-section {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  border-radius: var(--radius-xl);
  padding: 48px;
  text-align: center;
  margin: 48px 0;
  position: relative;
  overflow: hidden;
}
.newsletter-section h3 { color: white; font-size: 1.6rem; margin-bottom: 8px; }
.newsletter-section p { color: rgba(255,255,255,0.75); margin-bottom: 24px; }
.newsletter-form { display: flex; gap: 0; max-width: 440px; margin: 0 auto; }
.newsletter-form input {
  flex: 1;
  padding: 12px 18px;
  border: none;
  border-radius: var(--radius-md) 0 0 var(--radius-md);
  font-size: 0.9rem;
  outline: none;
}
.newsletter-form button {
  padding: 12px 22px;
  background: var(--color-secondary);
  color: white;
  border: none;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}
.newsletter-form button:hover { background: var(--color-secondary-light); }

/* Loading skeleton */
.skeleton { background: linear-gradient(90deg, var(--color-bg-alt) 25%, var(--color-border) 50%, var(--color-bg-alt) 75%); background-size: 200% 100%; animation: shimmer 1.4s infinite; border-radius: var(--radius-sm); }
@keyframes shimmer { to { background-position: -200% 0; } }

/* Back to top */
.back-to-top {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 44px;
  height: 44px;
  background: var(--color-primary);
  color: white;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  transform: translateY(16px);
  transition: var(--transition);
  z-index: 99;
}
.back-to-top.visible { opacity: 1; transform: translateY(0); }
.back-to-top:hover { background: var(--color-primary-dark); }

/* Mobile menu overlay */
.mobile-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 200;
}
.mobile-menu {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: 80%;
  max-width: 320px;
  background: var(--color-surface);
  z-index: 201;
  padding: 24px;
  transform: translateX(-100%);
  transition: transform 0.3s ease;
  overflow-y: auto;
}
.mobile-menu.open { transform: translateX(0); }
.mobile-overlay.open { display: block; }

/* ============================================================
   UTILITY
   ============================================================ */
.text-center { text-align: center; }
.mt-1 { margin-top: 8px; } .mt-2 { margin-top: 16px; } .mt-3 { margin-top: 24px; }
.mb-1 { margin-bottom: 8px; } .mb-2 { margin-bottom: 16px; } .mb-3 { margin-bottom: 24px; }
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); }
.section-title {
  text-align: center;
  margin-bottom: 40px;
}
.section-title h2 { margin-bottom: 10px; }
.section-title p { color: var(--color-text-muted); max-width: 500px; margin: 0 auto; }

/* ============================================================
   PRINT
   ============================================================ */
@media print {
  .site-header, .sidebar, .site-footer, .back-to-top { display: none; }
  .grid-sidebar { grid-template-columns: 1fr; }
  .post-content { font-size: 12pt; }
}