:root {
  --color-primary: #0d9488;
  --color-primary-dark: #0f766e;
  --color-primary-light: #ccfbf1;
  --color-secondary: #ff7f50;
  --color-secondary-dark: #e8673a;
  --color-accent: #ff6b6b;
  --color-bg: #fffbf5;
  --color-bg-card: #ffffff;
  --color-bg-muted: #f9fafb;
  --color-text: #1f2937;
  --color-text-secondary: #6b7280;
  --color-text-muted: #9ca3af;
  --color-border: #e5e7eb;
  --color-border-focus: #0d9488;
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-danger: #ef4444;
  --color-info: #3b82f6;

  --font-heading: 'Poppins', system-ui, sans-serif;
  --font-body: 'Inter', system-ui, sans-serif;
  --font-size-base: 16px;
  --line-height-body: 1.7;
  --line-height-heading: 1.2;

  --fs-xs: clamp(0.75rem, 1.5vw, 0.875rem);
  --fs-sm: clamp(0.875rem, 1.8vw, 1rem);
  --fs-base: clamp(1rem, 2vw, 1.125rem);
  --fs-lg: clamp(1.125rem, 2.2vw, 1.25rem);
  --fs-xl: clamp(1.25rem, 2.5vw, 1.5rem);
  --fs-2xl: clamp(1.375rem, 3vw, 2rem);
  --fs-3xl: clamp(1.75rem, 4vw, 2.5rem);
  --fs-4xl: clamp(1.75rem, 5vw, 3rem);

  --radius-sm: 6px;
  --radius: 12px;
  --radius-lg: 18px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;
  --space-20: 80px;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow: 0 4px 12px rgba(13, 148, 136, 0.10);
  --shadow-md: 0 6px 20px rgba(13, 148, 136, 0.14);
  --shadow-lg: 0 12px 32px rgba(13, 148, 136, 0.18);
  --shadow-focus: 0 0 0 3px rgba(13, 148, 136, 0.25);

  --max-width: 1200px;
  --content-width: 720px;
  --sidebar-width: 300px;

  --transition-fast: 150ms ease;
  --transition: 250ms ease;
  --transition-slow: 400ms ease;

  --header-height: 64px;
  --z-base: 1;
  --z-sticky: 100;
  --z-overlay: 200;
  --z-modal: 300;
  --z-toast: 400;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #0f172a;
    --color-bg-card: #1e293b;
    --color-bg-muted: #1a2540;
    --color-text: #f1f5f9;
    --color-text-secondary: #94a3b8;
    --color-text-muted: #64748b;
    --color-border: #334155;
    --color-primary-light: #134e4a;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 6px 20px rgba(0, 0, 0, 0.45);
    --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.5);
  }
}

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

html {
  font-size: var(--font-size-base);
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scrollbar-width: thin;
  scrollbar-color: var(--color-primary) var(--color-bg-muted);
}

::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: var(--color-bg-muted);
}

::-webkit-scrollbar-thumb {
  background: var(--color-primary);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-primary-dark);
}

body {
  font-family: var(--font-body);
  font-size: var(--fs-base);
  line-height: var(--line-height-body);
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img,
video,
svg {
  display: block;
  max-width: 100%;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-primary-dark);
}

ul,
ol {
  list-style: none;
}

button,
input,
select,
textarea {
  font: inherit;
  color: inherit;
  border: none;
  background: none;
  outline: none;
}

button {
  cursor: pointer;
}

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
  z-index: calc(var(--z-sticky) + 10);
  transition: width 0.1s linear;
  will-change: width;
}

.site-header {
  position: sticky;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: rgba(255, 251, 245, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  z-index: var(--z-sticky);
  transition: border-color var(--transition), box-shadow var(--transition), background var(--transition);
}

@media (prefers-color-scheme: dark) {
  .site-header {
    background: rgba(15, 23, 42, 0.85);
  }
}

.site-header.scrolled {
  border-color: var(--color-border);
  box-shadow: var(--shadow-sm);
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-4);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
}

.site-logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-heading);
  font-size: var(--fs-xl);
  font-weight: 700;
  color: var(--color-primary);
  flex-shrink: 0;
}

.site-logo img {
  width: 36px;
  height: 36px;
  object-fit: contain;
}

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

.site-nav {
  display: none;
}

@media (min-width: 768px) {
  .site-nav {
    display: flex;
    align-items: center;
    gap: var(--space-1);
  }
}

.site-nav a {
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--color-text);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast), background var(--transition-fast);
}

.site-nav a:hover,
.site-nav a.active {
  color: var(--color-primary);
  background: var(--color-primary-light);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.btn-search {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  color: var(--color-text-secondary);
  transition: color var(--transition-fast), background var(--transition-fast);
}

.btn-search:hover {
  color: var(--color-primary);
  background: var(--color-primary-light);
}

.btn-menu {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}

@media (min-width: 768px) {
  .btn-menu {
    display: none;
  }
}

.mobile-nav {
  position: fixed;
  inset: 0;
  background: var(--color-bg-card);
  z-index: var(--z-overlay);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  transform: translateX(100%);
  transition: transform var(--transition-slow);
}

.mobile-nav.open {
  transform: translateX(0);
}

.mobile-nav a {
  font-family: var(--font-heading);
  font-size: var(--fs-xl);
  font-weight: 600;
  color: var(--color-text);
  padding: var(--space-4) 0;
  border-bottom: 1px solid var(--color-border);
  display: block;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-4);
}

@media (min-width: 640px) {
  .container {
    padding: 0 var(--space-6);
  }
}

.ad-banner-top {
  width: 100%;
  min-height: 90px;
  background: var(--color-bg-muted);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  margin: var(--space-6) auto;
  max-width: var(--max-width);
  padding: 0 var(--space-4);
  contain: strict;
  border: 1px dashed var(--color-border);
}

.ad-in-content {
  display: block;
  width: 100%;
  max-width: 336px;
  min-height: 280px;
  margin: var(--space-8) auto;
  background: var(--color-bg-muted);
  border-radius: var(--radius);
  overflow: hidden;
  contain: strict;
  border: 1px dashed var(--color-border);
}

.ad-sidebar {
  position: sticky;
  top: calc(var(--header-height) + var(--space-4));
  width: 100%;
  max-width: 300px;
  min-height: 250px;
  background: var(--color-bg-muted);
  border-radius: var(--radius);
  overflow: hidden;
  contain: strict;
  border: 1px dashed var(--color-border);
  margin-bottom: var(--space-6);
}

.ad-footer {
  width: 100%;
  min-height: 90px;
  background: var(--color-bg-muted);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  contain: strict;
  border: 1px dashed var(--color-border);
  margin: var(--space-8) 0;
}

.hero {
  position: relative;
  width: 100%;
  min-height: 480px;
  display: flex;
  align-items: flex-end;
  overflow: hidden;
  border-radius: var(--radius-lg);
  margin: var(--space-6) 0;
}

@media (min-width: 768px) {
  .hero {
    min-height: 560px;
  }
}

.hero-image {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to top,
    rgba(15, 23, 42, 0.85) 0%,
    rgba(15, 23, 42, 0.4) 50%,
    rgba(15, 23, 42, 0.1) 100%
  );
}

.hero-content {
  position: relative;
  z-index: var(--z-base);
  padding: var(--space-8) var(--space-6);
  max-width: 680px;
}

.hero-category {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--fs-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #ffffff;
  background: var(--color-secondary);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-4);
}

.hero-title {
  font-family: var(--font-heading);
  font-size: var(--fs-4xl);
  font-weight: 700;
  line-height: var(--line-height-heading);
  color: #ffffff;
  margin-bottom: var(--space-4);
}

.hero-meta {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.hero-meta span {
  font-size: var(--fs-sm);
  color: rgba(255, 255, 255, 0.8);
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.page-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
  margin: var(--space-8) 0;
}

@media (min-width: 1024px) {
  .page-layout {
    grid-template-columns: minmax(0, 1fr) var(--sidebar-width);
    gap: var(--space-10);
  }
}

.main-content {
  min-width: 0;
}

.sidebar {
  min-width: 0;
}

.posts-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

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

@media (min-width: 1024px) {
  .posts-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.post-card {
  background: var(--color-bg-card);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  transition: transform var(--transition), box-shadow var(--transition);
  contain: content;
  display: flex;
  flex-direction: column;
}

.post-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  will-change: transform;
}

.post-card-image-wrap {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--color-bg-muted);
  flex-shrink: 0;
}

.post-card-image-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.post-card:hover .post-card-image-wrap img {
  transform: scale(1.05);
  will-change: transform;
}

.post-card-body {
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  flex: 1;
}

.post-card-footer {
  margin-top: auto;
  padding-top: var(--space-3);
  border-top: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.category-pill {
  display: inline-flex;
  align-items: center;
  font-size: var(--fs-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-primary);
  background: var(--color-primary-light);
  padding: 2px var(--space-2);
  border-radius: var(--radius-full);
  transition: background var(--transition-fast), color var(--transition-fast);
}

.category-pill:hover {
  background: var(--color-primary);
  color: #ffffff;
}

.category-pill.secondary {
  color: var(--color-secondary-dark);
  background: rgba(255, 127, 80, 0.12);
}

.post-card-title {
  font-family: var(--font-heading);
  font-size: var(--fs-lg);
  font-weight: 600;
  line-height: 1.35;
  color: var(--color-text);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.post-card-title a {
  color: inherit;
}

.post-card-title a:hover {
  color: var(--color-primary);
}

.post-card-excerpt {
  font-size: var(--fs-sm);
  color: var(--color-text-secondary);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.post-meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
}

.post-meta span {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.post-meta svg {
  width: 13px;
  height: 13px;
  flex-shrink: 0;
}

.post-card-featured {
  grid-column: 1 / -1;
  flex-direction: row;
}

.post-card-featured .post-card-image-wrap {
  width: 45%;
  flex-shrink: 0;
  aspect-ratio: auto;
  min-height: 240px;
}

@media (max-width: 639px) {
  .post-card-featured {
    flex-direction: column;
  }

  .post-card-featured .post-card-image-wrap {
    width: 100%;
    aspect-ratio: 16 / 9;
    min-height: auto;
  }
}

.article-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
  margin: var(--space-6) 0 var(--space-16);
}

@media (min-width: 1024px) {
  .article-layout {
    grid-template-columns: minmax(0, 1fr) var(--sidebar-width);
    gap: var(--space-12);
  }
}

.article-wrap {
  min-width: 0;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  margin-bottom: var(--space-6);
}

.breadcrumb a {
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}

.breadcrumb a:hover {
  color: var(--color-primary);
}

.breadcrumb-sep {
  color: var(--color-border);
  user-select: none;
}

.article-header {
  margin-bottom: var(--space-8);
}

.article-header .category-pill {
  margin-bottom: var(--space-4);
}

.article-title {
  font-family: var(--font-heading);
  font-size: clamp(1.75rem, 5vw, 3rem);
  font-weight: 700;
  line-height: 1.15;
  color: var(--color-text);
  margin-bottom: var(--space-5);
}

.article-meta-bar {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-wrap: wrap;
  padding: var(--space-4);
  background: var(--color-bg-muted);
  border-radius: var(--radius);
  font-size: var(--fs-xs);
  color: var(--color-text-secondary);
  border-left: 3px solid var(--color-primary);
}

.article-meta-bar .meta-item {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.fact-checked-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--fs-xs);
  font-weight: 600;
  color: var(--color-success);
  background: rgba(16, 185, 129, 0.1);
  padding: 2px var(--space-2);
  border-radius: var(--radius-full);
  border: 1px solid rgba(16, 185, 129, 0.2);
}

.article-featured-image {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: var(--radius);
  margin-bottom: var(--space-8);
}

.article-body {
  max-width: var(--content-width);
}

.article-body p {
  margin-bottom: var(--space-5);
  font-size: var(--fs-base);
  line-height: var(--line-height-body);
  max-width: 68ch;
  color: var(--color-text);
}

.article-body h2 {
  font-family: var(--font-heading);
  font-size: var(--fs-2xl);
  font-weight: 700;
  line-height: var(--line-height-heading);
  color: var(--color-text);
  margin-top: var(--space-12);
  margin-bottom: var(--space-5);
  padding-bottom: var(--space-3);
  border-bottom: 2px solid var(--color-primary-light);
}

.article-body h3 {
  font-family: var(--font-heading);
  font-size: var(--fs-xl);
  font-weight: 600;
  line-height: 1.3;
  color: var(--color-text);
  margin-top: var(--space-8);
  margin-bottom: var(--space-4);
}

.article-body h4 {
  font-family: var(--font-heading);
  font-size: var(--fs-lg);
  font-weight: 600;
  color: var(--color-text);
  margin-top: var(--space-6);
  margin-bottom: var(--space-3);
}

.article-body ul,
.article-body ol {
  margin-bottom: var(--space-5);
  padding-left: var(--space-6);
}

.article-body ul {
  list-style: none;
}

.article-body ul li {
  position: relative;
  padding-left: var(--space-5);
  margin-bottom: var(--space-2);
}

.article-body ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.65em;
  width: 8px;
  height: 8px;
  background: var(--color-primary);
  border-radius: 50%;
  flex-shrink: 0;
}

.article-body ol {
  list-style: decimal;
}

.article-body ol li {
  margin-bottom: var(--space-2);
  padding-left: var(--space-2);
}

.article-body ol li::marker {
  color: var(--color-primary);
  font-weight: 700;
}

.article-body a {
  color: var(--color-primary);
  text-decoration: underline;
  text-decoration-color: rgba(13, 148, 136, 0.3);
  text-underline-offset: 3px;
  transition: text-decoration-color var(--transition-fast), color var(--transition-fast);
}

.article-body a:hover {
  color: var(--color-primary-dark);
  text-decoration-color: var(--color-primary);
}

.article-body strong {
  font-weight: 700;
  color: var(--color-text);
}

.article-body em {
  font-style: italic;
}

.article-body img {
  border-radius: var(--radius);
  margin: var(--space-6) 0;
  box-shadow: var(--shadow);
}

.article-body figure {
  margin: var(--space-8) 0;
}

.article-body figcaption {
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  text-align: center;
  margin-top: var(--space-2);
}

.article-body blockquote {
  border-left: 4px solid var(--color-primary);
  padding: var(--space-4) var(--space-6);
  margin: var(--space-8) 0;
  background: var(--color-primary-light);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-size: var(--fs-lg);
  font-style: italic;
  color: var(--color-text-secondary);
}

.article-body blockquote p {
  margin-bottom: 0;
  max-width: none;
}

.article-body blockquote cite {
  display: block;
  font-size: var(--fs-sm);
  font-style: normal;
  font-weight: 600;
  color: var(--color-primary);
  margin-top: var(--space-3);
}

.callout {
  display: flex;
  gap: var(--space-4);
  padding: var(--space-5);
  border-radius: var(--radius);
  margin: var(--space-6) 0;
  border: 1px solid;
}

.callout-icon {
  font-size: 1.25rem;
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.callout-body {
  flex: 1;
  min-width: 0;
}

.callout-title {
  font-family: var(--font-heading);
  font-size: var(--fs-sm);
  font-weight: 700;
  margin-bottom: var(--space-2);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.callout-body p {
  font-size: var(--fs-sm);
  margin-bottom: 0;
  max-width: none;
}

.callout.tip {
  background: rgba(13, 148, 136, 0.06);
  border-color: rgba(13, 148, 136, 0.2);
  color: var(--color-text);
}

.callout.tip .callout-title {
  color: var(--color-primary);
}

.callout.warning {
  background: rgba(245, 158, 11, 0.08);
  border-color: rgba(245, 158, 11, 0.25);
}

.callout.warning .callout-title {
  color: var(--color-warning);
}

.callout.note {
  background: rgba(59, 130, 246, 0.06);
  border-color: rgba(59, 130, 246, 0.2);
}

.callout.note .callout-title {
  color: var(--color-info);
}

.callout.danger {
  background: rgba(239, 68, 68, 0.06);
  border-color: rgba(239, 68, 68, 0.2);
}

.callout.danger .callout-title {
  color: var(--color-danger);
}

.table-wrap {
  overflow-x: auto;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  margin: var(--space-8) 0;
  box-shadow: var(--shadow-sm);
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--fs-sm);
}

.comparison-table thead {
  background: var(--color-primary);
  color: #ffffff;
}

.comparison-table thead th {
  font-family: var(--font-heading);
  font-weight: 600;
  padding: var(--space-4) var(--space-5);
  text-align: left;
  white-space: nowrap;
}

.comparison-table thead th:first-child {
  border-radius: var(--radius) 0 0 0;
}

.comparison-table thead th:last-child {
  border-radius: 0 var(--radius) 0 0;
}

.comparison-table tbody tr {
  border-bottom: 1px solid var(--color-border);
  transition: background var(--transition-fast);
}

.comparison-table tbody tr:last-child {
  border-bottom: none;
}

.comparison-table tbody tr:nth-child(even) {
  background: var(--color-bg-muted);
}

.comparison-table tbody tr:hover {
  background: var(--color-primary-light);
}

.comparison-table td {
  padding: var(--space-4) var(--space-5);
  color: var(--color-text);
}

.comparison-table .col-highlight {
  font-weight: 600;
  color: var(--color-primary);
}

.table-check {
  color: var(--color-success);
  font-weight: 700;
}

.table-cross {
  color: var(--color-danger);
}

.author-box {
  display: flex;
  gap: var(--space-5);
  align-items: flex-start;
  padding: var(--space-6);
  background: var(--color-bg-card);
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  margin: var(--space-10) 0;
  box-shadow: var(--shadow-sm);
}

@media (max-width: 480px) {
  .author-box {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }
}

.author-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--color-primary-light);
  flex-shrink: 0;
}

.author-info {
  flex: 1;
  min-width: 0;
}

.author-label {
  font-size: var(--fs-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-primary);
  font-weight: 600;
  margin-bottom: var(--space-1);
}

.author-name {
  font-family: var(--font-heading);
  font-size: var(--fs-lg);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.author-bio {
  font-size: var(--fs-sm);
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin-bottom: var(--space-4);
}

.author-socials {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.author-social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: var(--radius-sm);
  background: var(--color-bg-muted);
  color: var(--color-text-secondary);
  transition: background var(--transition-fast), color var(--transition-fast);
}

.author-social-link:hover {
  background: var(--color-primary);
  color: #ffffff;
}

.social-share-bar {
  display: flex;
  gap: var(--space-2);
  align-items: center;
  flex-wrap: wrap;
  margin: var(--space-8) 0;
  padding: var(--space-5);
  background: var(--color-bg-card);
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
}

.social-share-label {
  font-size: var(--fs-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
  margin-right: var(--space-2);
}

.social-share-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  font-size: var(--fs-xs);
  font-weight: 600;
  transition: opacity var(--transition-fast), transform var(--transition-fast);
  color: #ffffff;
}

.social-share-btn:hover {
  opacity: 0.9;
  transform: translateY(-1px);
  color: #ffffff;
}

.social-share-btn.twitter { background: #1da1f2; }
.social-share-btn.facebook { background: #1877f2; }
.social-share-btn.pinterest { background: #e60023; }
.social-share-btn.email { background: var(--color-text-secondary); }

.social-share-fixed {
  display: none;
}

@media (min-width: 1280px) {
  .social-share-fixed {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    position: fixed;
    left: max(var(--space-4), calc((100vw - var(--max-width)) / 2 - 56px));
    top: 50%;
    transform: translateY(-50%);
    z-index: var(--z-sticky);
  }

  .social-share-fixed .social-share-btn {
    width: 42px;
    height: 42px;
    padding: 0;
    border-radius: var(--radius-sm);
    justify-content: center;
  }

  .social-share-fixed .social-share-btn span {
    display: none;
  }
}

.social-share-mobile {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  display: flex;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-4);
  background: var(--color-bg-card);
  border-top: 1px solid var(--color-border);
  z-index: var(--z-sticky);
  justify-content: space-around;
  box-shadow: 0 -4px 12px rgba(0, 0, 0, 0.08);
}

@media (min-width: 768px) {
  .social-share-mobile {
    display: none;
  }
}

.social-share-mobile .social-share-btn {
  flex: 1;
  justify-content: center;
  border-radius: var(--radius-sm);
}

.toc-widget {
  background: var(--color-bg-card);
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  overflow: hidden;
  margin-bottom: var(--space-6);
}

.toc-widget-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-5);
  background: var(--color-primary-light);
  font-family: var(--font-heading);
  font-size: var(--fs-sm);
  font-weight: 700;
  color: var(--color-primary);
  cursor: pointer;
}

.toc-list {
  padding: var(--space-4) var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.toc-item a {
  font-size: var(--fs-sm);
  color: var(--color-text-secondary);
  display: block;
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  border-left: 2px solid transparent;
  transition: color var(--transition-fast), border-color var(--transition-fast), background var(--transition-fast);
}

.toc-item a:hover,
.toc-item.active a {
  color: var(--color-primary);
  border-color: var(--color-primary);
  background: var(--color-primary-light);
}

.toc-item.level-3 a {
  padding-left: var(--space-5);
  font-size: var(--fs-xs);
}

.sidebar-widget {
  background: var(--color-bg-card);
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  overflow: hidden;
  margin-bottom: var(--space-6);
  box-shadow: var(--shadow-sm);
}

.widget-title {
  font-family: var(--font-heading);
  font-size: var(--fs-sm);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text);
  padding: var(--space-4) var(--space-5);
  border-bottom: 2px solid var(--color-primary);
}

.widget-body {
  padding: var(--space-5);
}

.widget-post-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.widget-post {
  display: flex;
  gap: var(--space-3);
  align-items: flex-start;
}

.widget-post-image {
  width: 64px;
  height: 64px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
  background: var(--color-bg-muted);
}

.widget-post-title {
  font-size: var(--fs-xs);
  font-weight: 600;
  color: var(--color-text);
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: var(--space-1);
}

.widget-post-title a {
  color: inherit;
}

.widget-post-title a:hover {
  color: var(--color-primary);
}

.widget-post-date {
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
}

.newsletter-widget {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: #ffffff;
  border-radius: var(--radius);
  padding: var(--space-6);
  margin-bottom: var(--space-6);
  text-align: center;
}

.newsletter-icon {
  font-size: 2rem;
  margin-bottom: var(--space-3);
}

.newsletter-title {
  font-family: var(--font-heading);
  font-size: var(--fs-lg);
  font-weight: 700;
  margin-bottom: var(--space-2);
}

.newsletter-desc {
  font-size: var(--fs-sm);
  opacity: 0.9;
  line-height: 1.6;
  margin-bottom: var(--space-5);
}

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

.newsletter-input {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius);
  border: none;
  background: rgba(255, 255, 255, 0.95);
  font-size: var(--fs-sm);
  color: var(--color-text);
}

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

.newsletter-input:focus {
  outline: 2px solid rgba(255, 255, 255, 0.5);
  outline-offset: 1px;
}

.newsletter-submit {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius);
  background: var(--color-secondary);
  color: #ffffff;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: var(--fs-sm);
  transition: background var(--transition-fast), transform var(--transition-fast);
}

.newsletter-submit:hover {
  background: var(--color-secondary-dark);
  transform: translateY(-1px);
}

.newsletter-privacy {
  font-size: var(--fs-xs);
  opacity: 0.75;
  margin-top: var(--space-2);
}

.newsletter-section {
  background: var(--color-bg-muted);
  padding: var(--space-12) 0;
  border-radius: var(--radius-lg);
  margin: var(--space-12) 0;
}

.newsletter-section-inner {
  max-width: 560px;
  margin: 0 auto;
  padding: 0 var(--space-4);
  text-align: center;
}

.newsletter-section .newsletter-title {
  font-family: var(--font-heading);
  font-size: var(--fs-2xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-3);
}

.newsletter-section .newsletter-desc {
  color: var(--color-text-secondary);
  opacity: 1;
  margin-bottom: var(--space-6);
}

.newsletter-section .newsletter-form {
  flex-direction: row;
  gap: var(--space-2);
}

.newsletter-section .newsletter-input {
  flex: 1;
  border: 1px solid var(--color-border);
}

.newsletter-section .newsletter-submit {
  width: auto;
  flex-shrink: 0;
  background: var(--color-primary);
}

.newsletter-section .newsletter-submit:hover {
  background: var(--color-primary-dark);
}

@media (max-width: 480px) {
  .newsletter-section .newsletter-form {
    flex-direction: column;
  }
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius);
  font-family: var(--font-heading);
  font-size: var(--fs-sm);
  font-weight: 700;
  line-height: 1;
  cursor: pointer;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), opacity var(--transition-fast);
  white-space: nowrap;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn:active {
  transform: translateY(0);
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: #ffffff;
  box-shadow: var(--shadow);
}

.btn-primary:hover {
  box-shadow: var(--shadow-md);
  color: #ffffff;
}

.btn-secondary {
  background: var(--color-secondary);
  color: #ffffff;
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
  background: var(--color-secondary-dark);
  color: #ffffff;
}

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
  box-shadow: none;
}

.btn-outline:hover {
  background: var(--color-primary-light);
  color: var(--color-primary);
}

.btn-ghost {
  background: transparent;
  color: var(--color-text-secondary);
}

.btn-ghost:hover {
  background: var(--color-bg-muted);
  color: var(--color-text);
}

.btn-sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--fs-xs);
}

.btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--fs-base);
}

.cta-box {
  background: linear-gradient(135deg, var(--color-primary-light), rgba(255, 127, 80, 0.08));
  border-radius: var(--radius-lg);
  padding: var(--space-8) var(--space-6);
  margin: var(--space-10) 0;
  text-align: center;
  border: 1px solid rgba(13, 148, 136, 0.2);
}

.cta-box-title {
  font-family: var(--font-heading);
  font-size: var(--fs-2xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-3);
}

.cta-box-desc {
  font-size: var(--fs-base);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-6);
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}

.cta-box-actions {
  display: flex;
  gap: var(--space-3);
  justify-content: center;
  flex-wrap: wrap;
}

.related-posts {
  margin: var(--space-10) 0;
}

.related-title {
  font-family: var(--font-heading);
  font-size: var(--fs-xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-3);
  border-bottom: 2px solid var(--color-border);
}

.related-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
}

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

@media (min-width: 768px) {
  .related-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  flex-wrap: wrap;
  padding: var(--space-8) 0;
}

.pagination-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
  padding: 0 var(--space-3);
  border-radius: var(--radius);
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--color-text-secondary);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  transition: color var(--transition-fast), background var(--transition-fast), border-color var(--transition-fast);
}

.pagination-btn:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
  background: var(--color-primary-light);
}

.pagination-btn.active {
  background: var(--color-primary);
  color: #ffffff;
  border-color: var(--color-primary);
}

.pagination-btn:disabled,
.pagination-btn.disabled {
  opacity: 0.4;
  pointer-events: none;
}

.pagination-dots {
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  padding: 0 var(--space-1);
}

.tag-cloud {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.tag {
  display: inline-flex;
  align-items: center;
  font-size: var(--fs-xs);
  font-weight: 500;
  color: var(--color-text-secondary);
  background: var(--color-bg-muted);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
  transition: color var(--transition-fast), background var(--transition-fast), border-color var(--transition-fast);
}

.tag:hover {
  color: var(--color-primary);
  background: var(--color-primary-light);
  border-color: var(--color-primary);
}

.rating-stars {
  display: inline-flex;
  gap: 2px;
  align-items: center;
}

.star {
  width: 16px;
  height: 16px;
  fill: var(--color-warning);
  color: var(--color-warning);
}

.star.empty {
  fill: var(--color-border);
  color: var(--color-border);
}

.product-card {
  background: var(--color-bg-card);
  border-radius: var(--radius);
  border: 2px solid var(--color-border);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.product-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow);
}

.product-card-badge {
  background: var(--color-accent);
  color: #ffffff;
  font-size: var(--fs-xs);
  font-weight: 700;
  text-transform: uppercase;
  padding: var(--space-1) var(--space-3);
  letter-spacing: 0.06em;
}

.product-card-body {
  padding: var(--space-5);
}

.product-price {
  font-family: var(--font-heading);
  font-size: var(--fs-2xl);
  font-weight: 700;
  color: var(--color-primary);
  margin: var(--space-3) 0;
}

.product-price-original {
  font-size: var(--fs-base);
  color: var(--color-text-muted);
  text-decoration: line-through;
  margin-left: var(--space-2);
}

.product-pros-cons {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
  margin: var(--space-4) 0;
  font-size: var(--fs-sm);
}

.pros-title {
  font-weight: 700;
  color: var(--color-success);
  margin-bottom: var(--space-2);
  font-family: var(--font-heading);
}

.cons-title {
  font-weight: 700;
  color: var(--color-danger);
  margin-bottom: var(--space-2);
  font-family: var(--font-heading);
}

.pros-list li,
.cons-list li {
  position: relative;
  padding-left: var(--space-4);
  margin-bottom: var(--space-1);
  color: var(--color-text-secondary);
}

.pros-list li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--color-success);
  font-weight: 700;
}

.cons-list li::before {
  content: '✗';
  position: absolute;
  left: 0;
  color: var(--color-danger);
  font-weight: 700;
}

.back-to-top {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: var(--color-primary);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  opacity: 0;
  transform: translateY(12px);
  transition: opacity var(--transition), transform var(--transition);
  pointer-events: none;
  z-index: var(--z-sticky);
}

@media (max-width: 767px) {
  .back-to-top {
    bottom: calc(var(--space-12) + var(--space-4));
  }
}

.back-to-top.visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
  will-change: transform;
}

.back-to-top:hover {
  background: var(--color-primary-dark);
  color: #ffffff;
}

.site-footer {
  background: var(--color-text);
  color: rgba(255, 255, 255, 0.7);
  padding: var(--space-12) 0 var(--space-6);
  margin-top: var(--space-16);
}

@media (prefers-color-scheme: dark) {
  .site-footer {
    background: #0a0f1e;
  }
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
  margin-bottom: var(--space-10);
}

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

@media (min-width: 1024px) {
  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr 1fr;
  }
}

.footer-brand {
  grid-column: 1;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-heading);
  font-size: var(--fs-xl);
  font-weight: 700;
  color: #ffffff;
  margin-bottom: var(--space-4);
}

.footer-desc {
  font-size: var(--fs-sm);
  line-height: 1.7;
  margin-bottom: var(--space-5);
}

.footer-column-title {
  font-family: var(--font-heading);
  font-size: var(--fs-sm);
  font-weight: 700;
  color: #ffffff;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-4);
}

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

.footer-links a {
  font-size: var(--fs-sm);
  color: rgba(255, 255, 255, 0.6);
  transition: color var(--transition-fast);
}

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

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--space-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
  font-size: var(--fs-xs);
}

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

.footer-legal a {
  color: rgba(255, 255, 255, 0.5);
  font-size: var(--fs-xs);
  transition: color var(--transition-fast);
}

.footer-legal a:hover {
  color: rgba(255, 255, 255, 0.9);
}

.affiliate-disclosure {
  width: 100%;
  padding: var(--space-4) var(--space-5);
  background: rgba(255, 127, 80, 0.08);
  border-left: 3px solid var(--color-secondary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: var(--fs-xs);
  color: var(--color-text-secondary);
  margin: var(--space-6) 0;
  line-height: 1.6;
}

.skip-link {
  position: absolute;
  top: -9999px;
  left: var(--space-4);
  padding: var(--space-2) var(--space-4);
  background: var(--color-primary);
  color: #ffffff;
  border-radius: var(--radius);
  font-weight: 700;
  z-index: 9999;
}

.skip-link:focus {
  top: var(--space-4);
}

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

.section-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
  flex-wrap: wrap;
}

.section-title {
  font-family: var(--font-heading);
  font-size: var(--fs-2xl);
  font-weight: 700;
  color: var(--color-text);
  position: relative;
  padding-bottom: var(--space-3);
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 40px;
  height: 3px;
  background: var(--color-primary);
  border-radius: var(--radius-full);
}

.section-link {
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--color-primary);
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  white-space: nowrap;
  flex-shrink: 0;
}

.section-link svg {
  width: 14px;
  height: 14px;
  transition: transform var(--transition-fast);
}

.section-link:hover svg {
  transform: translateX(3px);
}

.category-nav {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
  margin-bottom: var(--space-8);
}

.category-nav-btn {
  padding: var(--space-2) var(--space-5);
  border-radius: var(--radius-full);
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--color-text-secondary);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  transition: all var(--transition-fast);
}

.category-nav-btn:hover,
.category-nav-btn.active {
  color: var(--color-primary);
  background: var(--color-primary-light);
  border-color: var(--color-primary);
}

.badge {
  display: inline-flex;
  align-items: center;
  font-size: 11px;
  font-weight: 700;
  padding: 2px var(--space-2);
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.badge-new { background: rgba(13, 148, 136, 0.12); color: var(--color-primary); }
.badge-hot { background: rgba(239, 68, 68, 0.12); color: var(--color-danger); }
.badge-sale { background: rgba(245, 158, 11, 0.12); color: var(--color-warning); }
.badge-popular { background: rgba(255, 127, 80, 0.12); color: var(--color-secondary); }

.loading-skeleton {
  background: linear-gradient(
    90deg,
    var(--color-bg-muted) 25%,
    var(--color-border) 50%,
    var(--color-bg-muted) 75%
  );
  background-size: 200% 100%;
  animation: skeleton-shimmer 1.5s ease-in-out infinite;
  border-radius: var(--radius-sm);
}

@keyframes skeleton-shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

@media (prefers-reduced-motion: reduce) {
  .loading-skeleton {
    animation: none;
    background: var(--color-bg-muted);
  }
}

.divider {
  width: 100%;
  height: 1px;
  background: var(--color-border);
  margin: var(--space-8) 0;
}

.text-primary { color: var(--color-primary); }
.text-secondary { color: var(--color-text-secondary); }
.text-muted { color: var(--color-text-muted); }
.text-accent { color: var(--color-secondary); }
.font-heading { font-family: var(--font-heading); }
.font-bold { font-weight: 700; }
.font-semibold { font-weight: 600; }
.text-center { text-align: center; }
.mt-auto { margin-top: auto; }
.w-full { width: 100%; }
.flex { display: flex; }
.items-center { align-items: center; }
.gap-2 { gap: var(--space-2); }
.gap-4 { gap: var(--space-4); }