/* =============================================================================
   Kotora Tech Theme - Main Stylesheet
   ============================================================================= */

/* -----------------------------------------------------------------------------
   CSS Custom Properties (Design Tokens)
   ----------------------------------------------------------------------------- */
:root {
  /* Colors */
  --color-primary: #1a1a2e;
  --color-primary-light: #252547;
  --color-accent: #00b4d8;
  --color-accent-dark: #0096b4;
  --color-accent-light: #e8f8fb;
  --color-text: #2d2d2d;
  --color-text-muted: #6b7280;
  --color-text-light: #9ca3af;
  --color-bg: #f8f9fa;
  --color-bg-white: #ffffff;
  --color-border: #e5e7eb;
  --color-border-light: #f3f4f6;
  --color-code-bg: #0d1117;

  /* Typography */
  --font-sans: 'Inter', 'Noto Sans JP', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;

  /* Border radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.12);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;

  /* Layout */
  --container-max: 1200px;
  --sidebar-width: 300px;
  --content-max: 800px;
}

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

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

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.75;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

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

p {
  margin: 0 0 1.25em;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0 0 0.75em;
  line-height: 1.3;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--color-primary);
}

ul, ol {
  margin: 0 0 1.25em;
  padding-left: 1.75em;
}

li {
  margin-bottom: 0.35em;
}

/* Screen reader only */
.screen-reader-text {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Skip link */
.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  z-index: 9999;
  padding: 0.5rem 1rem;
  background: var(--color-accent);
  color: #fff;
  border-radius: var(--radius-sm);
  font-weight: 600;
}
.skip-link:focus {
  top: 1rem;
}

/* -----------------------------------------------------------------------------
   Layout
   ----------------------------------------------------------------------------- */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

@media (max-width: 768px) {
  .container {
    padding: 0 var(--space-md);
  }
}

/* Main layout with sidebar */
.blog-main.container,
.content-area--single + .container > .blog-main {
  display: grid;
  grid-template-columns: 1fr var(--sidebar-width);
  gap: var(--space-3xl);
  padding-top: var(--space-3xl);
  padding-bottom: var(--space-3xl);
}

.blog-main.container {
  display: grid;
  grid-template-columns: 1fr var(--sidebar-width);
  gap: var(--space-3xl);
  padding-top: var(--space-3xl);
  padding-bottom: var(--space-3xl);
  align-items: start;
}

/* Single post - full width */
.content-area--single {
  max-width: var(--content-max);
  width: 100%;
}

/* Container for single post layout (with sidebar) */
.site-main > .container {
  display: grid;
  grid-template-columns: 1fr var(--sidebar-width);
  gap: var(--space-3xl);
  padding-top: var(--space-3xl);
  padding-bottom: var(--space-3xl);
  align-items: start;
}

@media (max-width: 1024px) {
  .blog-main.container,
  .site-main > .container {
    grid-template-columns: 1fr;
  }

  .sidebar {
    display: none;
  }
}

/* -----------------------------------------------------------------------------
   Header
   ----------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-primary);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

/* WordPress管理バー対応 */
.admin-bar .site-header {
  top: 32px;
}

@media screen and (max-width: 782px) {
  .admin-bar .site-header {
    top: 46px;
  }
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: var(--space-xl);
}

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

/* Logo */
.site-header__logo-link {
  display: flex;
  align-items: center;
  text-decoration: none;
  color: #fff;
}

.site-header__logo-text {
  font-family: var(--font-sans);
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: #fff;
  line-height: 1.2;
}

.site-header__logo-img {
  height: 36px;
  width: auto;
  display: block;
  filter: brightness(0) invert(1);
}

.site-header__logo .custom-logo-link {
  display: flex;
  align-items: center;
  line-height: 0;
}

.site-header__logo .custom-logo {
  height: 36px;
  width: auto;
  display: block;
  filter: brightness(0) invert(1);
}

.site-header__title {
  margin: 0;
  font-size: 1rem;
}

.site-header__title a {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  color: #fff;
  text-decoration: none;
  font-weight: 700;
}

.site-header__title-text {
  font-size: 1.1rem;
  letter-spacing: 0.02em;
}

.site-header__title-badge {
  display: inline-block;
  padding: 2px 8px;
  background: var(--color-accent);
  color: var(--color-primary);
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border-radius: var(--radius-sm);
}

.site-header__description {
  display: none;
}

.site-header__right {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

/* Header CTA Buttons */
.header-cta-btns {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.header-cta-btn {
  display: inline-flex;
  align-items: center;
  padding: 8px 16px;
  font-size: 0.8rem;
  font-weight: 700;
  border-radius: var(--radius-md);
  text-decoration: none;
  white-space: nowrap;
  transition: background var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
}

.header-cta-btn--register {
  background: var(--color-accent);
  color: var(--color-primary);
}

.header-cta-btn--register:hover {
  background: #fff;
  color: var(--color-primary);
  transform: translateY(-1px);
}

.header-cta-btn--mypage {
  background: transparent;
  color: rgba(255, 255, 255, 0.85);
  border: 1px solid rgba(255, 255, 255, 0.4);
}

.header-cta-btn--mypage:hover {
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
  transform: translateY(-1px);
}

@media (max-width: 768px) {
  .header-cta-btns {
    display: none;
  }
}

/* Navigation */
.main-navigation {
  display: flex;
  align-items: center;
}

.nav-menu {
  display: flex;
  align-items: center;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: 0;
}

.nav-menu > li > a {
  display: block;
  padding: var(--space-sm) var(--space-md);
  color: rgba(255, 255, 255, 0.85);
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast), background var(--transition-fast);
}

.nav-menu > li > a:hover,
.nav-menu > li.current-menu-item > a,
.nav-menu > li.current_page_item > a {
  color: #fff;
  background: rgba(255, 255, 255, 0.1);
}

.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 0;
  background: transparent;
  border: none;
  cursor: pointer;
}

.menu-toggle__bar {
  display: block;
  width: 22px;
  height: 2px;
  background: #fff;
  border-radius: 1px;
  transition: transform var(--transition-base), opacity var(--transition-base);
}

/* Search toggle */
.search-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  padding: 0;
  background: transparent;
  border: none;
  color: rgba(255, 255, 255, 0.85);
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast), background var(--transition-fast);
}

.search-toggle:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.1);
}

/* Search Overlay */
.search-overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 80px;
  background: rgba(26, 26, 46, 0.95);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base);
}

.search-overlay.is-open {
  opacity: 1;
  pointer-events: auto;
}

.search-overlay__inner {
  width: 100%;
  max-width: 600px;
  padding: 0 var(--space-xl);
  position: relative;
}

.search-overlay__form {
  display: flex;
  border: 2px solid var(--color-accent);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: #fff;
}

.search-overlay__input {
  flex: 1;
  padding: var(--space-md) var(--space-lg);
  border: none;
  outline: none;
  font-size: 1.125rem;
  font-family: var(--font-sans);
}

.search-overlay__submit {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-md) var(--space-lg);
  background: var(--color-accent);
  border: none;
  color: #fff;
  cursor: pointer;
  transition: background var(--transition-fast);
}

.search-overlay__submit:hover {
  background: var(--color-accent-dark);
}

.search-overlay__close {
  position: absolute;
  top: -60px;
  right: var(--space-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: #fff;
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast), border-color var(--transition-fast);
}

.search-overlay__close:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.6);
}

@media (max-width: 768px) {
  .menu-toggle {
    display: flex;
  }

  .main-navigation .nav-menu {
    display: none;
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--color-primary);
    flex-direction: column;
    padding: var(--space-md) 0;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
  }

  .main-navigation.is-open .nav-menu {
    display: flex;
  }

  .nav-menu > li > a {
    padding: var(--space-md) var(--space-xl);
    border-radius: 0;
  }
}

/* -----------------------------------------------------------------------------
   Blog Hero
   ----------------------------------------------------------------------------- */
.blog-hero {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  padding: var(--space-3xl) 0;
  position: relative;
  overflow: hidden;
}

.blog-hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(0, 180, 216, 0.15) 0%, transparent 70%);
  pointer-events: none;
}

.blog-hero__inner {
  position: relative;
  z-index: 1;
  max-width: 640px;
}

.blog-hero__label {
  display: inline-block;
  margin: 0 0 var(--space-md);
  padding: 4px 12px;
  background: var(--color-accent);
  color: var(--color-primary);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border-radius: var(--radius-full);
}

.blog-hero__title {
  margin: 0 0 var(--space-lg);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  color: #fff;
  line-height: 1.25;
}

.blog-hero__description {
  margin: 0;
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.75);
  line-height: 1.75;
}

/* -----------------------------------------------------------------------------
   Archive Header
   ----------------------------------------------------------------------------- */
.archive-header {
  background: var(--color-primary);
  padding: var(--space-2xl) 0;
  text-align: center;
}

.archive-header__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
}

.archive-header__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  background: rgba(0, 180, 216, 0.15);
  border-radius: var(--radius-full);
  color: var(--color-accent);
  margin-bottom: var(--space-sm);
}

.archive-header__label {
  margin: 0;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.archive-header__title {
  margin: 0;
  font-size: clamp(1.5rem, 3vw, 2rem);
  color: #fff;
}

.archive-header__title mark {
  background: transparent;
  color: var(--color-accent);
}

.archive-header__description {
  margin: 0;
  color: rgba(255, 255, 255, 0.7);
  max-width: 600px;
}

.archive-header__count {
  margin: 0;
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.5);
}

/* -----------------------------------------------------------------------------
   Blog Index Header
   ----------------------------------------------------------------------------- */
.blog-index-header {
  margin-bottom: var(--space-2xl);
  padding-bottom: var(--space-xl);
  border-bottom: 2px solid var(--color-border);
}

.blog-index-header__title {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  font-size: clamp(1.25rem, 2.5vw, 1.75rem);
  margin: 0 0 var(--space-sm);
  color: var(--color-primary);
}

.blog-index-header__badge {
  display: inline-block;
  padding: 4px 12px;
  background: var(--color-accent);
  color: var(--color-primary);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border-radius: var(--radius-full);
  flex-shrink: 0;
}

.blog-index-header__desc {
  margin: 0;
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.blog-index-header--paged .blog-index-header__title {
  font-size: 1.25rem;
}

.blog-index-header__paged {
  margin: 0;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

/* -----------------------------------------------------------------------------
   Featured Post
   ----------------------------------------------------------------------------- */
.featured-post {
  margin-bottom: var(--space-3xl);
}

.featured-article {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  background: var(--color-bg-white);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.featured-article:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.15);
}

.featured-article__thumbnail img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.featured-article__body {
  display: flex;
  flex-direction: column;
  padding: var(--space-2xl);
}

.featured-article__meta {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
}

.featured-article__label {
  display: inline-block;
  padding: 3px 10px;
  background: var(--color-accent);
  color: var(--color-primary);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border-radius: var(--radius-full);
}

.featured-article__title {
  font-size: 1.5rem;
  margin: 0 0 var(--space-md);
  line-height: 1.35;
}

.featured-article__title a {
  color: var(--color-primary);
}

.featured-article__title a:hover {
  color: var(--color-accent-dark);
}

.featured-article__excerpt {
  flex: 1;
  margin: 0 0 var(--space-xl);
  color: var(--color-text-muted);
  font-size: 0.925rem;
  line-height: 1.7;
}

.featured-article__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
}

.featured-article__info {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.featured-article__date,
.featured-article__reading-time {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

@media (max-width: 768px) {
  .featured-article {
    grid-template-columns: 1fr;
  }

  .featured-article__thumbnail {
    height: 200px;
  }
}

/* -----------------------------------------------------------------------------
   Section Heading
   ----------------------------------------------------------------------------- */
.section-heading {
  font-size: 1.25rem;
  font-weight: 700;
  margin: 0 0 var(--space-xl);
  padding-bottom: var(--space-md);
  border-bottom: 2px solid var(--color-border);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.section-heading::before {
  content: '';
  display: block;
  width: 4px;
  height: 1.25em;
  background: var(--color-accent);
  border-radius: 2px;
}

/* -----------------------------------------------------------------------------
   Posts Grid
   ----------------------------------------------------------------------------- */
.posts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--space-xl);
  margin-bottom: var(--space-2xl);
}

@media (max-width: 640px) {
  .posts-grid {
    grid-template-columns: 1fr;
  }
}

/* Post Card */
.post-card {
  background: var(--color-bg-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
  display: flex;
  flex-direction: column;
}

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

.post-card__thumbnail {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--color-border-light);
}

.post-card__thumbnail img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.post-card:hover .post-card__thumbnail img {
  transform: scale(1.03);
}

.post-card__thumbnail--no-image {
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
}

.post-card__no-image-text {
  color: rgba(255, 255, 255, 0.3);
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.05em;
}

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

.post-card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  margin-bottom: var(--space-sm);
}

.post-card__title {
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.45;
  margin: 0 0 var(--space-sm);
}

.post-card__title a {
  color: var(--color-primary);
  text-decoration: none;
}

.post-card__title a:hover {
  color: var(--color-accent-dark);
}

.post-card__excerpt {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.65;
  margin: 0 0 var(--space-lg);
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.post-card__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
  margin-top: auto;
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-border-light);
}

.post-card__info {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.post-card__date,
.post-card__reading-time {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 0.75rem;
  color: var(--color-text-light);
}

.post-card__link {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-accent-dark);
  white-space: nowrap;
}

.post-card__link:hover {
  color: var(--color-accent);
}

/* Category Badge */
.category-badge {
  display: inline-block;
  padding: 3px 10px;
  background: var(--color-accent-light);
  color: var(--color-accent-dark);
  font-size: 0.7rem;
  font-weight: 700;
  border-radius: var(--radius-full);
  text-decoration: none;
  transition: background var(--transition-fast), color var(--transition-fast);
}

.category-badge:hover {
  background: var(--color-accent);
  color: #fff;
}

/* -----------------------------------------------------------------------------
   Single Article
   ----------------------------------------------------------------------------- */
.single-article {
  background: var(--color-bg-white);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.single-article__header {
  padding: var(--space-2xl) var(--space-2xl) 0;
}

.single-article__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
}

.single-article__title {
  font-size: clamp(1.4rem, 3.5vw, 2rem);
  line-height: 1.35;
  margin: 0 0 var(--space-lg);
  color: var(--color-primary);
}

.single-article__info {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-md);
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid var(--color-border-light);
}

.single-article__date,
.single-article__updated,
.single-article__reading-time {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.single-article__eyecatch {
  margin: var(--space-xl) 0 0;
}

.single-article__eyecatch img {
  width: 100%;
  border-radius: var(--radius-md);
}

.single-article__body {
  padding: var(--space-2xl);
}

.single-article__footer {
  padding: var(--space-xl) var(--space-2xl) var(--space-2xl);
  border-top: 1px solid var(--color-border);
}

/* Entry content (article body) */
.single-article__body h2,
.entry-content h2 {
  font-size: 1.5rem;
  margin: 2.5em 0 1em;
  padding: 0.6em 1em;
  background: var(--color-primary);
  color: #fff;
  border-radius: var(--radius-md);
  position: relative;
}

.single-article__body h2::before,
.entry-content h2::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--color-accent);
  border-radius: var(--radius-sm) 0 0 var(--radius-sm);
}

.single-article__body h3,
.entry-content h3 {
  font-size: 1.2rem;
  margin: 2em 0 0.75em;
  padding: 0.5em 0.75em;
  border-left: 3px solid var(--color-accent);
  color: var(--color-primary);
}

.single-article__body h4,
.entry-content h4 {
  font-size: 1.05rem;
  margin: 1.75em 0 0.5em;
  color: var(--color-primary);
}

.single-article__body pre,
.entry-content pre {
  margin: 1.5em 0;
  border-radius: var(--radius-md);
  overflow: hidden;
}

.single-article__body code,
.entry-content code {
  font-family: var(--font-mono);
  font-size: 0.875em;
}

.single-article__body :not(pre) > code,
.entry-content :not(pre) > code {
  padding: 0.2em 0.45em;
  background: #eef0f3;
  border-radius: var(--radius-sm);
  color: #c7254e;
  font-size: 0.85em;
}

.single-article__body blockquote,
.entry-content blockquote {
  margin: 1.5em 0;
  padding: 1.25em 1.5em;
  background: var(--color-bg);
  border-left: 4px solid var(--color-accent);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  color: var(--color-text-muted);
  font-style: italic;
}

.single-article__body table,
.entry-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5em 0;
  font-size: 0.9rem;
}

.single-article__body th,
.entry-content th {
  background: var(--color-primary);
  color: #fff;
  padding: 0.75em 1em;
  text-align: left;
  font-weight: 600;
}

.single-article__body td,
.entry-content td {
  padding: 0.65em 1em;
  border-bottom: 1px solid var(--color-border);
}

.single-article__body tr:nth-child(even) td,
.entry-content tr:nth-child(even) td {
  background: var(--color-border-light);
}

.single-article__body img,
.entry-content img {
  max-width: 100%;
  border-radius: var(--radius-md);
  margin: 1em 0;
}

.single-article__body a,
.entry-content a {
  color: var(--color-accent-dark);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.single-article__body a:hover,
.entry-content a:hover {
  color: var(--color-accent);
}

/* Table of Contents */
.toc {
  margin: 2em 0;
  padding: var(--space-xl);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  border-left: 4px solid var(--color-accent);
}

.toc__title {
  font-size: 1rem;
  font-weight: 700;
  margin: 0 0 var(--space-md);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.toc__title::before {
  content: '📋';
  font-size: 1rem;
}

.toc__list {
  margin: 0;
  padding-left: 1.5em;
}

.toc__list li {
  margin-bottom: 0.4em;
  font-size: 0.9rem;
}

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

.toc__list a:hover {
  color: var(--color-accent-dark);
}

.toc__item--sub {
  padding-left: 1em;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

/* Tags */
.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  list-style: none;
  margin: 0 0 var(--space-xl);
  padding: 0;
}

.tag-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 12px;
  background: var(--color-border-light);
  color: var(--color-text-muted);
  font-size: 0.8rem;
  border-radius: var(--radius-full);
  text-decoration: none;
  transition: background var(--transition-fast), color var(--transition-fast);
}

.tag-link::before {
  content: '#';
  opacity: 0.6;
}

.tag-link:hover {
  background: var(--color-accent-light);
  color: var(--color-accent-dark);
}

/* Share buttons */
.single-article__share-label {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-text-muted);
  margin: 0 0 var(--space-md);
}

.share-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.share-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 8px 16px;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.share-btn:hover {
  opacity: 0.85;
  transform: translateY(-1px);
}

.share-btn--twitter {
  background: #000;
  color: #fff;
}

.share-btn--facebook {
  background: #1877f2;
  color: #fff;
}

.share-btn--hatena {
  background: #00a4de;
  color: #fff;
}

.share-btn--copy {
  background: var(--color-border);
  color: var(--color-text);
}

/* Post Navigation */
.post-navigation {
  margin-top: var(--space-xl);
}

.post-navigation__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
}

.post-navigation__prev,
.post-navigation__next {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  padding: var(--space-lg);
  background: var(--color-bg-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-base);
}

.post-navigation__prev:hover,
.post-navigation__next:hover {
  box-shadow: var(--shadow-md);
}

.post-navigation__next {
  text-align: right;
}

.post-navigation__label {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.post-navigation__next .post-navigation__label {
  justify-content: flex-end;
}

.post-navigation__link {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-primary);
  text-decoration: none;
  line-height: 1.4;
}

.post-navigation__link:hover {
  color: var(--color-accent-dark);
}

@media (max-width: 640px) {
  .post-navigation__inner {
    grid-template-columns: 1fr;
  }
}

/* -----------------------------------------------------------------------------
   Page Article
   ----------------------------------------------------------------------------- */
.page-article {
  background: var(--color-bg-white);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.page-article__header {
  padding: var(--space-2xl) var(--space-2xl) 0;
}

.page-article__title {
  font-size: clamp(1.4rem, 3.5vw, 2rem);
  color: var(--color-primary);
  margin: 0 0 var(--space-lg);
  padding-bottom: var(--space-lg);
  border-bottom: 2px solid var(--color-border);
}

.page-article__eyecatch {
  margin-bottom: var(--space-xl);
}

.page-article__eyecatch img {
  width: 100%;
}

.page-article__body {
  padding: var(--space-2xl);
}

/* -----------------------------------------------------------------------------
   Sidebar
   ----------------------------------------------------------------------------- */
.sidebar {
  align-self: start;
}

.widget {
  background: var(--color-bg-white);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  margin-bottom: var(--space-xl);
  box-shadow: var(--shadow-sm);
}

.widget__title {
  font-size: 0.95rem;
  font-weight: 700;
  margin: 0 0 var(--space-md);
  padding-bottom: var(--space-md);
  border-bottom: 2px solid var(--color-border);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.widget__title::before {
  content: '';
  display: block;
  width: 3px;
  height: 1em;
  background: var(--color-accent);
  border-radius: 2px;
}

.widget ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.widget ul li {
  padding: 0.4em 0;
  border-bottom: 1px solid var(--color-border-light);
  font-size: 0.875rem;
}

.widget ul li:last-child {
  border-bottom: none;
}

.widget ul li a {
  color: var(--color-text);
  text-decoration: none;
}

.widget ul li a:hover {
  color: var(--color-accent-dark);
}

/* SNS Links widget */
.sns-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.sns-link {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: 10px 14px;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 600;
  text-decoration: none;
  transition: opacity var(--transition-fast), transform var(--transition-fast);
  color: #fff;
}

.sns-link:hover {
  opacity: 0.88;
  transform: translateX(3px);
  color: #fff;
}

.sns-link--facebook  { background: #1877f2; }
.sns-link--youtube   { background: #ff0000; }
.sns-link--twitter   { background: #000; }
.sns-link--linkedin  { background: #0077b5; }

/* Tag cloud widget */
.tagcloud {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.tagcloud .tag-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  background: var(--color-border-light);
  color: var(--color-text-muted);
  font-size: 0.775rem;
  border-radius: var(--radius-full);
  text-decoration: none;
  transition: background var(--transition-fast), color var(--transition-fast);
}

.tagcloud .tag-link::before {
  content: '#';
  opacity: 0.5;
}

.tagcloud .tag-link:hover {
  background: var(--color-accent-light);
  color: var(--color-accent-dark);
}

.tag-count {
  font-size: 0.7rem;
  color: var(--color-text-light);
  background: rgba(0, 0, 0, 0.06);
  padding: 1px 5px;
  border-radius: var(--radius-full);
}

/* Search widget */
.widget_search .search-form {
  display: flex;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.widget_search .search-field {
  flex: 1;
  padding: var(--space-sm) var(--space-md);
  border: none;
  outline: none;
  font-size: 0.875rem;
  font-family: var(--font-sans);
}

.widget_search .search-submit {
  padding: var(--space-sm) var(--space-md);
  background: var(--color-accent);
  border: none;
  color: #fff;
  cursor: pointer;
  font-size: 0.875rem;
  font-weight: 600;
  transition: background var(--transition-fast);
}

.widget_search .search-submit:hover {
  background: var(--color-accent-dark);
}

/* -----------------------------------------------------------------------------
   Buttons
   ----------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 10px 24px;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: background var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
}

.btn--primary {
  background: var(--color-accent);
  color: var(--color-primary);
}

.btn--primary:hover {
  background: var(--color-accent-dark);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0, 180, 216, 0.3);
}

/* -----------------------------------------------------------------------------
   Pagination
   ----------------------------------------------------------------------------- */
.pagination-wrapper {
  margin-top: var(--space-2xl);
}

.navigation.pagination {
  display: flex;
  justify-content: center;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  flex-wrap: wrap;
  justify-content: center;
}

.page-numbers {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
  padding: 0 var(--space-sm);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  color: var(--color-text);
  text-decoration: none;
  transition: background var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
}

.page-numbers:hover:not(.current):not(.dots) {
  background: var(--color-accent-light);
  border-color: var(--color-accent);
  color: var(--color-accent-dark);
}

.page-numbers.current {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-primary);
  font-weight: 700;
}

.page-numbers.dots {
  border-color: transparent;
  cursor: default;
}

.prev.page-numbers,
.next.page-numbers {
  font-weight: 600;
  padding: 0 var(--space-md);
}

/* -----------------------------------------------------------------------------
   No Results
   ----------------------------------------------------------------------------- */
.no-results__inner {
  text-align: center;
  padding: var(--space-3xl) var(--space-xl);
}

.no-results__icon {
  color: var(--color-border);
  margin: 0 auto var(--space-lg);
}

.no-results__title {
  font-size: 1.5rem;
  color: var(--color-primary);
  margin: 0 0 var(--space-md);
}

.no-results__text {
  color: var(--color-text-muted);
  margin: 0 0 var(--space-xl);
}

.no-results__search {
  max-width: 400px;
  margin: 0 auto;
}

/* -----------------------------------------------------------------------------
   404 Page
   ----------------------------------------------------------------------------- */
.error-404__inner {
  text-align: center;
  padding: var(--space-3xl) var(--space-xl);
  max-width: 600px;
  margin: 0 auto;
}

.error-404__number {
  font-size: 8rem;
  font-weight: 800;
  line-height: 1;
  color: var(--color-border);
  margin: 0 0 var(--space-md);
  letter-spacing: -0.04em;
}

.error-404__title {
  font-size: 1.75rem;
  color: var(--color-primary);
  margin: 0 0 var(--space-md);
}

.error-404__text {
  color: var(--color-text-muted);
  margin: 0 0 var(--space-xl);
}

.error-404__actions {
  margin: 0 0 var(--space-xl);
}

.error-404__search-label {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin: 0 0 var(--space-md);
}

/* -----------------------------------------------------------------------------
   Footer
   ----------------------------------------------------------------------------- */
.site-footer {
  background: var(--color-primary);
  color: rgba(255, 255, 255, 0.7);
  margin-top: var(--space-3xl);
}

.site-footer__bottom {
  padding: var(--space-2xl) 0 var(--space-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.site-footer__bottom-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-xl);
  margin-bottom: var(--space-lg);
}

.site-footer__logo-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  text-decoration: none;
}

.site-footer__logo-text {
  font-family: var(--font-sans);
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: #fff;
  line-height: 1.2;
}

.site-footer__logo-badge {
  padding: 2px 8px;
  background: var(--color-accent);
  color: var(--color-primary);
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border-radius: var(--radius-sm);
}

.site-footer__tagline {
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.5);
  margin: 4px 0 0;
}

.footer-nav-menu {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: var(--space-lg);
}

.footer-nav-menu li a {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.65);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-nav-menu li a:hover {
  color: #fff;
}

.site-footer__copyright {
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.4);
  text-align: center;
  padding-top: var(--space-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.07);
}

.site-footer__copyright a {
  color: rgba(255, 255, 255, 0.5);
}

@media (max-width: 768px) {
  .site-footer__bottom-top {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .footer-nav-menu {
    justify-content: center;
    flex-wrap: wrap;
  }
}

/* -----------------------------------------------------------------------------
   Comments
   ----------------------------------------------------------------------------- */
.comments-area {
  margin-top: var(--space-2xl);
  padding: var(--space-2xl);
  background: var(--color-bg-white);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
}

.comments-title {
  font-size: 1.25rem;
  margin: 0 0 var(--space-xl);
  padding-bottom: var(--space-md);
  border-bottom: 2px solid var(--color-border);
}

.comment-list {
  list-style: none;
  margin: 0 0 var(--space-xl);
  padding: 0;
}

.comment-body {
  padding: var(--space-lg);
  background: var(--color-bg);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-md);
}

/* Comment form */
.comment-form label {
  display: block;
  margin-bottom: var(--space-xs);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-primary);
}

.comment-form input[type="text"],
.comment-form input[type="email"],
.comment-form input[type="url"],
.comment-form textarea {
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  outline: none;
  transition: border-color var(--transition-fast);
}

.comment-form input[type="text"]:focus,
.comment-form input[type="email"]:focus,
.comment-form input[type="url"]:focus,
.comment-form textarea:focus {
  border-color: var(--color-accent);
}

.comment-form-comment label {
  margin-bottom: var(--space-sm);
}

.comment-form .form-submit {
  margin: 0;
}

/* Search form (WordPress default) */
.search-form {
  display: flex;
}

.search-form .search-field {
  flex: 1;
  padding: var(--space-sm) var(--space-md);
  border: 1px solid var(--color-border);
  border-right: none;
  border-radius: var(--radius-md) 0 0 var(--radius-md);
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  outline: none;
}

.search-form .search-field:focus {
  border-color: var(--color-accent);
}

.search-form .search-submit {
  padding: var(--space-sm) var(--space-lg);
  background: var(--color-accent);
  border: none;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  color: var(--color-primary);
  font-weight: 700;
  cursor: pointer;
  transition: background var(--transition-fast);
}

.search-form .search-submit:hover {
  background: var(--color-accent-dark);
  color: #fff;
}

/* -----------------------------------------------------------------------------
   Utility Classes
   ----------------------------------------------------------------------------- */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
}

/* WordPress alignment classes */
.alignleft {
  float: left;
  margin: 0 var(--space-xl) var(--space-md) 0;
}

.alignright {
  float: right;
  margin: 0 0 var(--space-md) var(--space-xl);
}

.aligncenter {
  display: block;
  margin: 0 auto var(--space-md);
}

/* Clearfix */
.clearfix::after {
  content: '';
  display: table;
  clear: both;
}

/* Highlight.js overrides */
.hljs {
  padding: 1.25em 1.5em;
  font-family: var(--font-mono);
  font-size: 0.875em;
  line-height: 1.6;
}

/* Copy notification */
.copy-notification {
  position: fixed;
  bottom: var(--space-xl);
  right: var(--space-xl);
  padding: var(--space-sm) var(--space-lg);
  background: var(--color-primary);
  color: #fff;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 600;
  z-index: 9999;
  opacity: 0;
  transform: translateY(10px);
  transition: opacity var(--transition-base), transform var(--transition-base);
  pointer-events: none;
}

.copy-notification.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* -----------------------------------------------------------------------------
   Fixed CTA Banner
   ----------------------------------------------------------------------------- */
.fixed-cta {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 500;
  display: flex;
  justify-content: center;
  padding: 0;
  pointer-events: none;
  transform: translateY(100%);
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.fixed-cta.is-visible {
  transform: translateY(0);
  pointer-events: auto;
}

.fixed-cta.is-hidden {
  transform: translateY(100%);
  pointer-events: none;
}

.fixed-cta__inner {
  position: relative;
  width: 100%;
  max-width: 480px;
  margin: 0 auto;
  display: flex;
  align-items: stretch;
  box-shadow: 0 -4px 24px rgba(0, 0, 0, 0.18);
}

.fixed-cta__link {
  display: block;
  flex: 1;
  line-height: 0;
  transition: opacity var(--transition-fast);
}

.fixed-cta__link:hover {
  opacity: 0.92;
}

.fixed-cta__image {
  width: 100%;
  height: auto;
  display: block;
  max-height: 60px;
  object-fit: cover;
}

.fixed-cta__close {
  position: absolute;
  top: 6px;
  right: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  padding: 0;
  background: rgba(0, 0, 0, 0.55);
  border: none;
  border-radius: 50%;
  color: #fff;
  cursor: pointer;
  transition: background var(--transition-fast), transform var(--transition-fast);
  z-index: 1;
}

.fixed-cta__close:hover {
  background: rgba(0, 0, 0, 0.8);
  transform: scale(1.1);
}

/* ページ下部に余白（CTA分） */
body.fixed-cta-visible {
  padding-bottom: 60px;
}

@media (max-width: 640px) {
  .fixed-cta__inner {
    max-width: 100%;
  }

  .fixed-cta__image {
    max-height: 50px;
  }

  body.fixed-cta-visible {
    padding-bottom: 50px;
  }
}