/* ==========================================================================
   Reset & Base
   ========================================================================== */

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: 1.8;
  color: var(--color-text);
  background-color: var(--color-bg);
  letter-spacing: 0.02em;
}

img, video { max-width: 100%; height: auto; display: block; }
a { color: var(--color-link); text-decoration: none; transition: color var(--transition-base); }
a:hover { color: var(--color-link-hover); }
ul, ol { list-style: none; }

/* ==========================================================================
   Layout
   ========================================================================== */

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 40px;
}
.container--wide   { max-width: var(--container-wide);   margin: 0 auto; padding: 0 40px; }
.container--narrow { max-width: var(--container-narrow); margin: 0 auto; padding: 0 40px; }

.content-area { padding-top: var(--space-8); padding-bottom: var(--space-16); }

/* ==========================================================================
   Buttons
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 24px;
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  font-weight: 700;
  line-height: 1.4;
  cursor: pointer;
  border: 2px solid transparent;
  text-decoration: none;
  transition: background-color var(--transition-base), color var(--transition-base), border-color var(--transition-base), transform var(--transition-base);
  white-space: nowrap;
}
.btn:hover { transform: translateY(-1px); }

.btn--primary { background: var(--color-primary); color: #fff; }
.btn--primary:hover { background: var(--color-primary-dark); color: #fff; }

.btn--accent { background: var(--color-accent); color: #fff; border-color: var(--color-accent); }
.btn--accent:hover { background: var(--color-accent-hover); border-color: var(--color-accent-hover); color: #fff; }

.btn--outline-white { background: transparent; color: #fff; border-color: #fff; }
.btn--outline-white:hover { background: rgba(255,255,255,0.15); color: #fff; }

.btn--lg { padding: 14px 32px; font-size: var(--text-base); }
.btn--sm { padding: 8px 20px; font-size: var(--text-xs); }
.btn--block { display: flex; width: 100%; }

/* ==========================================================================
   Header
   ========================================================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--color-bg);
  box-shadow: var(--shadow-header);
  height: var(--header-height);
  display: flex;
  align-items: center;
}

.site-header__inner {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  height: 100%;
}

.site-branding { flex-shrink: 0; }

.site-branding__title-link {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0.05em;
}

.main-navigation { flex: 1; }

.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.nav-menu li a {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text);
  padding-bottom: 4px;
  border-bottom: 2px solid transparent;
  transition: color var(--transition-base), border-color var(--transition-base);
}
.nav-menu li a:hover,
.nav-menu li.current-menu-item a {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

.site-header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-shrink: 0;
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.hamburger__line {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform var(--transition-base), opacity var(--transition-base);
}
.hamburger[aria-expanded="true"] .hamburger__line:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger[aria-expanded="true"] .hamburger__line:nth-child(2) { opacity: 0; }
.hamburger[aria-expanded="true"] .hamburger__line:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ==========================================================================
   Hero
   ========================================================================== */

.hero {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  color: #fff;
  min-height: 480px;
  display: flex;
  align-items: center;
  padding: var(--space-16) 0;
}

.hero__title {
  font-size: var(--text-4xl);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: 0.03em;
  margin-bottom: var(--space-4);
}

.hero__sub {
  font-size: var(--text-md);
  opacity: 0.9;
  margin-bottom: var(--space-8);
  max-width: 560px;
}

.hero__actions {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
}

/* ==========================================================================
   Sections
   ========================================================================== */

.section { padding: var(--space-16) 0; }
.section--white { background: var(--color-bg); }
.section--light { background: var(--color-bg-light); }

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-8);
}

.section-title {
  font-size: var(--text-2xl);
  font-weight: 700;
  letter-spacing: 0.05em;
}

.section-more {
  font-size: var(--text-sm);
  color: var(--color-primary);
  font-weight: 500;
}

/* ==========================================================================
   Article Cards
   ========================================================================== */

.article-grid {
  display: grid;
  gap: var(--space-6);
}
.article-grid--3 { grid-template-columns: repeat(3, 1fr); }
.article-grid--4 { grid-template-columns: repeat(4, 1fr); }

.article-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}
.article-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

.article-card__thumbnail img {
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
}

.article-card__no-thumb {
  width: 100%;
  aspect-ratio: 16/9;
  background: var(--color-bg-light);
}

.article-card__body {
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.article-card__title {
  font-size: var(--text-base);
  font-weight: 700;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

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

.article-card__meta {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  display: flex;
  gap: var(--space-3);
}

/* Card Medium */
.article-card-md {
  display: flex;
  gap: var(--space-4);
  align-items: flex-start;
}

.article-card-md__thumb-link img,
.article-card-md__no-thumb {
  width: 120px;
  height: 80px;
  object-fit: cover;
  flex-shrink: 0;
  border-radius: var(--radius-sm);
  background: var(--color-bg-light);
}

.article-card-md__body { flex: 1; }

.article-card-md__title {
  font-size: var(--text-sm);
  font-weight: 700;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ==========================================================================
   Category Nav
   ========================================================================== */

.category-nav-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: var(--space-3);
}

.category-nav-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-4) var(--space-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  text-align: center;
  gap: var(--space-1);
  transition: background-color var(--transition-base), border-color var(--transition-base);
  color: var(--color-text);
}
.category-nav-card:hover {
  background: var(--color-bg-light);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.category-nav-card__name { font-size: var(--text-sm); font-weight: 700; }
.category-nav-card__count { font-size: var(--text-xs); color: var(--color-text-muted); }

/* ==========================================================================
   Category Badge
   ========================================================================== */

.category-badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: var(--radius-sm);
  font-size: var(--text-xs);
  font-weight: 700;
  text-decoration: none;
}

/* ==========================================================================
   CTA Band
   ========================================================================== */

.cta-band {
  background: var(--color-primary);
  color: #fff;
  padding: var(--space-12) 0;
}

.cta-band__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-8);
}

.cta-band__title {
  font-size: var(--text-xl);
  font-weight: 700;
  margin-bottom: var(--space-2);
}

.cta-band__desc {
  font-size: var(--text-sm);
  opacity: 0.9;
}

.cta-band__actions {
  display: flex;
  gap: var(--space-4);
  flex-shrink: 0;
  flex-wrap: wrap;
}

/* ==========================================================================
   Inline CTA
   ========================================================================== */

.cta-inline {
  background: #F0F6FF;
  border: 1px solid var(--color-primary);
  border-left: 4px solid var(--color-primary);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: 24px 28px;
  margin: var(--space-8) 0;
}

.cta-inline__title {
  font-size: var(--text-md);
  font-weight: 700;
  margin-bottom: var(--space-2);
}

.cta-inline__text {
  font-size: var(--text-sm);
  color: var(--color-text-sub);
  margin-bottom: var(--space-4);
}

/* ==========================================================================
   Sidebar CTA
   ========================================================================== */

/* CTA Sidebar */
.cta-sidebar {
  background: #fff;
  border-radius: var(--radius-md);
  border-top: 4px solid var(--color-primary);
  box-shadow: 0 2px 16px rgba(0,0,0,.08);
  padding: var(--space-6);
  margin-bottom: var(--space-5);
  text-align: center;
}

.cta-sidebar__header {
  margin-bottom: var(--space-3);
}

.cta-sidebar__badge {
  display: inline-block;
  background: var(--color-accent);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .05em;
  padding: 3px 12px;
  border-radius: 20px;
  margin-bottom: var(--space-2);
}

.cta-sidebar__title {
  font-size: 15px;
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.6;
  margin-bottom: 0;
}

.cta-sidebar__list {
  list-style: none;
  padding: var(--space-3) 0;
  margin: 0 0 var(--space-4);
  text-align: left;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.cta-sidebar__list li {
  font-size: 13px;
  color: var(--color-text-muted);
  padding: 4px 0 4px 20px;
  position: relative;
}

.cta-sidebar__list li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--color-primary);
  font-weight: 700;
}

.cta-sidebar__btn {
  margin-bottom: var(--space-2);
}

.cta-sidebar__link {
  display: block;
  font-size: 13px;
  color: var(--color-primary);
  text-decoration: none;
  transition: color .2s;
}

.cta-sidebar__link:hover {
  text-decoration: underline;
}

/* Sidebar Sections */
.sidebar-section {
  margin-bottom: var(--space-5);
}

.sidebar-section__title {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 12px;
  font-weight: 700;
  color: var(--color-text-muted);
  letter-spacing: .1em;
  text-transform: uppercase;
  margin-bottom: var(--space-3);
}

.sidebar-section__title::before {
  content: '';
  display: inline-block;
  width: 3px;
  height: 14px;
  background: var(--color-primary);
  border-radius: 2px;
  flex-shrink: 0;
}

/* Category tags */
.sidebar-cat-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.sidebar-cat-list__item a {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 5px 12px;
  background: #f3f6fb;
  color: var(--color-text);
  text-decoration: none;
  font-size: 12px;
  border-radius: 20px;
  border: 1px solid #e4eaf4;
  transition: background .2s, color .2s, border-color .2s;
  white-space: nowrap;
}

.sidebar-cat-list__item a:hover {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

.sidebar-cat-list__count {
  font-size: 10px;
  color: inherit;
  opacity: .65;
}

/* Recent Posts */
.sidebar-recent-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.sidebar-recent-list__item {
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-border);
}

.sidebar-recent-list__item:first-child {
  padding-top: 0;
}

.sidebar-recent-list__item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.sidebar-recent-list__item a {
  display: flex;
  gap: var(--space-3);
  align-items: flex-start;
  text-decoration: none;
  color: var(--color-text);
}

.sidebar-recent-list__item a:hover .sidebar-recent-list__title {
  color: var(--color-primary);
}

.sidebar-recent-list__thumb {
  flex-shrink: 0;
  width: 80px;
  height: 54px;
  border-radius: 6px;
  overflow: hidden;
  margin: 0;
}

.sidebar-recent-list__thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.sidebar-recent-list__title {
  font-size: 12px;
  line-height: 1.55;
  color: var(--color-text);
  transition: color .2s;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ==========================================================================
   Single Article Layout
   ========================================================================== */

.single-layout {
  display: grid;
  grid-template-columns: 1fr var(--sidebar-width);
  gap: var(--space-8);
  align-items: start;
  padding-top: var(--space-8);
  padding-bottom: var(--space-16);
}

.single-sidebar {
  position: sticky;
  top: calc(var(--header-height) + var(--space-4));
}

/* Article Header */
.article-header { margin-bottom: var(--space-6); }

.article-header__meta {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-bottom: var(--space-3);
  flex-wrap: wrap;
}

.article-meta__date,
.article-meta__reading-time {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.article-header__title {
  font-size: var(--text-3xl);
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: 0.03em;
}

/* Article Thumbnail */
.article-thumbnail {
  margin-bottom: var(--space-8);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.article-thumbnail img {
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
}

/* ==========================================================================
   Article Body (entry-content)
   ========================================================================== */

.entry-content {
  font-size: var(--text-base);
  line-height: 1.8;
  color: var(--color-text);
}

.entry-content h2 {
  font-size: var(--text-2xl);
  font-weight: 700;
  margin: var(--space-12) 0 var(--space-4);
  padding-left: var(--space-4);
  border-left: 4px solid var(--color-primary);
  letter-spacing: 0.03em;
}

.entry-content h3 {
  font-size: var(--text-xl);
  font-weight: 700;
  margin: var(--space-8) 0 var(--space-3);
  padding-bottom: var(--space-2);
  border-bottom: 2px solid var(--color-border);
}

.entry-content h4 {
  font-size: var(--text-lg);
  font-weight: 700;
  margin: var(--space-6) 0 var(--space-2);
}

.entry-content p { margin-bottom: var(--space-4); }

.entry-content ul, .entry-content ol {
  list-style: initial;
  padding-left: var(--space-6);
  margin-bottom: var(--space-4);
}
.entry-content li { margin-bottom: var(--space-2); }

.entry-content table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: var(--space-6);
  font-size: var(--text-sm);
}
.entry-content th,
.entry-content td {
  border: 1px solid var(--color-border);
  padding: var(--space-3) var(--space-4);
  text-align: left;
}
.entry-content th {
  background: var(--color-bg-light);
  font-weight: 700;
}

.entry-content code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background: var(--color-bg-light);
  border: 1px solid var(--color-border);
  border-radius: 3px;
  padding: 2px 6px;
}

.entry-content pre {
  background: #1E1E1E;
  color: #D4D4D4;
  border-radius: var(--radius-md);
  padding: var(--space-4) var(--space-6);
  overflow-x: auto;
  margin-bottom: var(--space-4);
}
.entry-content pre code {
  background: none;
  border: none;
  padding: 0;
  font-size: var(--text-sm);
  color: inherit;
}

.entry-content blockquote {
  border-left: 4px solid var(--color-primary-light);
  margin: var(--space-6) 0;
  padding: var(--space-4) var(--space-6);
  background: var(--color-bg-light);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  color: var(--color-text-sub);
  font-style: italic;
}

.entry-content img {
  border-radius: var(--radius-md);
  margin: var(--space-4) 0;
}

/* ==========================================================================
   TOC
   ========================================================================== */

.toc {
  background: var(--color-bg-light);
  border-left: 4px solid var(--color-primary);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: var(--space-6);
  margin-bottom: var(--space-8);
}

.toc__label {
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--space-3);
}

.toc__list { counter-reset: toc; }

.toc__list li {
  counter-increment: toc;
  padding: 4px 0;
}

.toc__list li::before {
  content: counter(toc) '. ';
  font-weight: 700;
  color: var(--color-primary);
  font-size: var(--text-sm);
}

.toc__list li.toc__item--sub {
  counter-reset: none;
  padding-left: var(--space-4);
}

.toc__list li.toc__item--sub::before { content: ''; }

.toc__list a {
  font-size: var(--text-sm);
  color: var(--color-text);
  font-weight: 700;
}
.toc__list .toc__item--sub a {
  font-size: var(--text-xs);
  font-weight: 400;
  color: var(--color-text-sub);
}
.toc__list a:hover { color: var(--color-primary); text-decoration: underline; }
.toc__list a.is-active { color: var(--color-primary); font-weight: 700; }

/* ==========================================================================
   Author Box
   ========================================================================== */

.author-box {
  position: relative;
  background: var(--color-bg-light);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-6);
  margin: var(--space-8) 0;
}

.author-box__badge {
  position: absolute;
  top: -1px;
  left: -1px;
  background: var(--color-primary);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: var(--radius-sm) 0 var(--radius-sm) 0;
}

.author-box__inner {
  display: flex;
  gap: var(--space-4);
  align-items: flex-start;
  margin-top: var(--space-3);
}

.author-box__avatar {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  flex-shrink: 0;
  object-fit: cover;
}

.author-box__name {
  font-size: var(--text-base);
  font-weight: 700;
  margin-bottom: var(--space-1);
}

.author-box__bio {
  font-size: var(--text-sm);
  color: var(--color-text-sub);
  line-height: 1.7;
}

/* ==========================================================================
   Related Posts
   ========================================================================== */

.related-posts { margin: var(--space-8) 0; }

.related-posts__title {
  font-size: var(--text-lg);
  font-weight: 700;
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-2);
  border-bottom: 2px solid var(--color-border);
}

.related-posts__grid {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

/* ==========================================================================
   Breadcrumb
   ========================================================================== */

.breadcrumb {
  margin-bottom: var(--space-4);
}

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

.breadcrumb li {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.breadcrumb li:not(:last-child)::after {
  content: '›';
  margin-left: var(--space-2);
  color: #AAAAAA;
}

.breadcrumb a { color: var(--color-primary); }
.breadcrumb li[aria-current="page"] { color: var(--color-text); }

/* ==========================================================================
   FAQ
   ========================================================================== */

.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-2);
  overflow: hidden;
}

.faq-item__question {
  width: 100%;
  text-align: left;
  background: var(--color-bg-light);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--color-text);
  transition: background-color var(--transition-base);
}

.faq-item__question:hover { background: #EDF2FB; }

.faq-q-label {
  color: var(--color-primary);
  font-size: 1.25rem;
  font-weight: 700;
  flex-shrink: 0;
}

.faq-toggle {
  margin-left: auto;
  color: var(--color-text-muted);
  font-size: 1.25rem;
  flex-shrink: 0;
}

.faq-item__answer {
  padding: 0 var(--space-5) var(--space-4) 44px;
  font-size: 15px;
  line-height: 1.8;
  display: flex;
  gap: var(--space-3);
}

.faq-item__answer[hidden] {
  display: none;
}

.faq-a-label {
  color: var(--color-secondary);
  font-size: 1.25rem;
  font-weight: 700;
  flex-shrink: 0;
  margin-top: -2px;
}

/* ==========================================================================
   Archive Header
   ========================================================================== */

.archive-header {
  margin-bottom: var(--space-8);
  padding-bottom: var(--space-4);
  border-bottom: 2px solid var(--color-border);
}

.archive-title {
  font-size: var(--text-3xl);
  font-weight: 700;
}

.archive-description {
  font-size: var(--text-base);
  color: var(--color-text-sub);
  margin-top: var(--space-2);
}

/* ==========================================================================
   Pagination
   ========================================================================== */

.nav-links {
  display: flex;
  justify-content: center;
  gap: var(--space-2);
  margin-top: var(--space-12);
  flex-wrap: wrap;
}

.nav-links .page-numbers {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  color: var(--color-text);
  transition: background-color var(--transition-base), color var(--transition-base);
}
.nav-links .page-numbers:hover { background: var(--color-bg-light); }
.nav-links .page-numbers.current {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

/* ==========================================================================
   Footer
   ========================================================================== */

.site-footer {
  background: #1A1A1A;
  color: #CCCCCC;
  padding-top: var(--space-16);
}

.site-footer__inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--space-12);
  padding-bottom: var(--space-12);
}

.footer-logo {
  display: block;
  font-size: 1.25rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: var(--space-3);
}

.footer-tagline {
  font-size: var(--text-sm);
  color: #AAAAAA;
  line-height: 1.7;
}

.footer-col__title {
  font-size: var(--text-sm);
  font-weight: 700;
  color: #fff;
  margin-bottom: var(--space-4);
}

.footer-nav {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.footer-nav li a {
  font-size: var(--text-sm);
  color: #CCCCCC;
}
.footer-nav li a:hover { color: var(--color-primary-light); }

.site-footer__copyright {
  background: #111111;
  padding: var(--space-4) 0;
  text-align: center;
}

.site-footer__copyright p {
  font-size: var(--text-xs);
  color: #888;
}

/* ==========================================================================
   Accessibility
   ========================================================================== */

.skip-link {
  position: absolute;
  left: -9999px;
  top: auto;
  width: 1px;
  height: 1px;
  overflow: hidden;
}
.skip-link:focus {
  position: fixed;
  top: var(--space-2);
  left: var(--space-2);
  width: auto;
  height: auto;
  padding: var(--space-3) var(--space-4);
  background: var(--color-primary);
  color: #fff;
  font-weight: 700;
  z-index: 9999;
  border-radius: var(--radius-sm);
}

.screen-reader-text {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
}

/* ==========================================================================
   Responsive
   ========================================================================== */

@media (max-width: 1024px) {
  .container { padding: 0 24px; }
  .article-grid--4 { grid-template-columns: repeat(2, 1fr); }
  .category-nav-grid { grid-template-columns: repeat(4, 1fr); }
  .cta-band__inner { flex-direction: column; text-align: center; }
}

@media (max-width: 768px) {
  :root {
    --text-3xl: 1.625rem; /* 26px */
    --text-4xl: 1.75rem;  /* 28px */
    --header-height: 56px;
  }

  .container { padding: 0 16px; }

  /* Header */
  .header-cta { display: none; }
  .hamburger { display: flex; }
  .main-navigation {
    position: fixed;
    inset: 0;
    background: var(--color-bg);
    z-index: 999;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    transform: translateX(100%);
    transition: transform 0.3s ease;
  }
  .main-navigation.is-open { transform: translateX(0); }
  .nav-menu { flex-direction: column; gap: var(--space-6); font-size: var(--text-lg); }

  /* Hero */
  .hero { min-height: 360px; padding: var(--space-12) 0; }
  .hero__actions { flex-direction: column; align-items: flex-start; }

  /* Grids */
  .article-grid--3,
  .article-grid--4 { grid-template-columns: 1fr; }
  .category-nav-grid { grid-template-columns: repeat(3, 1fr); }

  /* Single */
  .single-layout { grid-template-columns: 1fr; }
  .single-sidebar { position: static; }
  .cta-sidebar { display: none; }

  /* Footer */
  .site-footer__inner { grid-template-columns: 1fr; gap: var(--space-8); }
  .cta-band__inner { flex-direction: column; }
  .cta-band__actions { flex-direction: column; align-items: stretch; }
}

@media (max-width: 480px) {
  .category-nav-grid { grid-template-columns: repeat(2, 1fr); }
}