/*
Theme Name: KairiLab - Cocoon Child Theme
Theme URI: https://kairilab.com
Description: KairiLab | 研究者の思考ノート - Premium LanPraデザインシステムを採用したCocoon子テーマ
Author: KairiLab
Author URI: https://kairilab.com
Template: cocoon-master
Version: 2.0.5
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: kairilab
*/

/* ========================================
   Premium CSS Variables - Luxury Design System
   ======================================== */

:root {
  /* Primary Colors - High Contrast Dark */
  --primary: #1e293b;
  --primary-dark: #0f172a;
  --primary-darker: #020617;
  --primary-light: #334155;
  --primary-lighter: #475569;
  --primary-soft: rgba(30, 41, 59, 0.08);

  /* Accent Colors - Bright Blue for High Visibility */
  --accent: #0066cc;
  --accent-light: #0080ff;
  --accent-dark: #0052a3;
  --accent-darker: #003d7a;
  --accent-soft: rgba(0, 102, 204, 0.12);
  --accent-gradient: linear-gradient(135deg, #0066cc 0%, #0080ff 100%);

  /* Secondary Accent */
  --accent-blue: #0066cc;
  --accent-blue-light: #0080ff;
  --accent-blue-dark: #0052a3;
  --accent-blue-soft: rgba(0, 102, 204, 0.12);

  /* Background Colors - Clean White Base */
  --bg-base: #ffffff;
  --bg-surface: #f8fafc;
  --bg-section: #f1f5f9;
  --bg-overlay: rgba(0, 0, 0, 0.5);
  --bg-gradient: linear-gradient(to bottom, #ffffff 0%, #f8fafc 50%, #f1f5f9 100%);
  --bg-hero: var(--bg-gradient);

  /* Text Colors - High Contrast */
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --text-white: #ffffff;
  --text-accent: #0066cc;

  /* Border Colors - More Visible */
  --border-light: #e2e8f0;
  --border-medium: #cbd5e1;
  --border-dark: #94a3b8;
  --border-accent: rgba(0, 102, 204, 0.3);

  /* Shadows - Stronger for Better Depth */
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1), 0 2px 4px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.12);
  --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.2);
  --shadow-accent: 0 8px 32px rgba(0, 102, 204, 0.3);

  /* Spacing Scale */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;
  --space-5xl: 8rem;

  /* Typography Scale */
  --font-xs: 0.875rem;
  --font-sm: 1rem;
  --font-md: 1.125rem;
  --font-lg: 1.25rem;
  --font-xl: 1.5rem;
  --font-2xl: 1.875rem;
  --font-3xl: 2.25rem;
  --font-4xl: 2.75rem;
  --font-5xl: 3.5rem;
  --font-6xl: 4.5rem;
  --font-7xl: 5.5rem;

  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.25rem;
  --radius-3xl: 1.5rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 200ms cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --transition-normal: 300ms cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --transition-slow: 400ms cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --transition-smooth: 600ms cubic-bezier(0.16, 1, 0.3, 1);

  /* Container Widths */
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
  --container-xl: 1280px;
  --container-2xl: 1536px;
}

/* ========================================
   Base Styles - Premium Typography
   ======================================== */

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Hiragino Kaku Gothic ProN', 'Hiragino Sans', 'Yu Gothic Medium', Meiryo, sans-serif;
  font-size: var(--font-sm);
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--bg-gradient);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: "kern" 1, "liga" 1;
}

/* Main Content Area - Adjust for Fixed Header */
.site-content,
#content {
  margin-top: 80px;
}

@media (max-width: 768px) {
  .site-content,
  #content {
    margin-top: 64px;
  }
}

/* ========================================
   Premium Typography
   ======================================== */

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.25;
  color: var(--text-primary);
  margin-bottom: var(--space-lg);
  letter-spacing: -0.025em;
}

h1 {
  font-size: var(--font-5xl);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.035em;
  word-spacing: 0.02em;
}

h2 {
  font-size: var(--font-4xl);
  font-weight: 750;
  letter-spacing: -0.03em;
  line-height: 1.15;
}

h3 {
  font-size: var(--font-2xl);
  font-weight: 650;
  letter-spacing: -0.02em;
  line-height: 1.3;
}

h4 {
  font-size: var(--font-xl);
  font-weight: 600;
  letter-spacing: -0.015em;
  line-height: 1.35;
}

p {
  margin-bottom: var(--space-lg);
  line-height: 1.85;
  color: var(--text-secondary);
  font-size: var(--font-md);
}

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

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

/* ========================================
   Container & Layout
   ======================================== */

.container,
.wrap {
  max-width: var(--container-xl);
  margin: 0 auto;
  padding: 0 var(--space-2xl);
}

.container-sm {
  max-width: var(--container-sm);
  margin: 0 auto;
  padding: 0 var(--space-2xl);
}

/* ========================================
   Premium Buttons - Enhanced Design
   ======================================== */

.btn,
button[type="submit"],
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 16px 40px;
  min-width: 200px;
  background: #007aff;
  color: white;
  font-size: 16px;
  font-weight: 500;
  border: none;
  border-radius: 9999px;
  box-shadow:
    0 1px 3px rgba(0, 122, 255, 0.12),
    0 1px 2px rgba(0, 0, 0, 0.08);
  cursor: pointer;
  transition: all 280ms cubic-bezier(0.4, 0, 0.2, 1);
  text-decoration: none;
  min-height: 52px;
  letter-spacing: 0.01em;
  position: relative;
}

.btn:hover,
button[type="submit"]:hover,
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow:
    0 4px 12px rgba(0, 122, 255, 0.2),
    0 2px 4px rgba(0, 0, 0, 0.12);
  background: #0066cc;
  color: white;
}

.btn:active,
button[type="submit"]:active,
.btn-primary:active {
  transform: translateY(0);
  box-shadow:
    0 1px 3px rgba(0, 122, 255, 0.12),
    0 1px 2px rgba(0, 0, 0, 0.08);
  transition: all 100ms ease;
}

/* ボタン内のテキストと矢印 */
.btn-text,
.btn-icon-arrow {
  display: inline-block;
  line-height: 1;
}

.btn-icon-arrow {
  font-size: 16px;
  transition: transform 280ms cubic-bezier(0.4, 0, 0.2, 1);
}

.btn-primary:hover .btn-icon-arrow,
.btn:hover .btn-icon-arrow,
button[type="submit"]:hover .btn-icon-arrow {
  transform: translateX(3px);
}

/* フォーカス状態（アクセシビリティ） */
.btn:focus-visible,
button[type="submit"]:focus-visible,
.btn-primary:focus-visible {
  outline: 3px solid rgba(0, 122, 255, 0.4);
  outline-offset: 2px;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 16px 40px;
  min-width: 200px;
  background: transparent;
  color: #475569;
  font-size: 16px;
  font-weight: 500;
  border: 1.5px solid rgba(71, 85, 105, 0.15);
  border-radius: 9999px;
  cursor: pointer;
  transition: all 280ms cubic-bezier(0.4, 0, 0.2, 1);
  text-decoration: none;
  min-height: 52px;
  letter-spacing: 0.01em;
  box-shadow: none;
}

.btn-secondary:hover {
  transform: translateY(-2px);
  background: rgba(71, 85, 105, 0.04);
  border-color: rgba(71, 85, 105, 0.3);
  color: #334155;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.btn-secondary:active {
  transform: translateY(0);
  box-shadow: none;
  transition: all 100ms ease;
}

.btn-secondary:focus-visible {
  outline: 3px solid rgba(71, 85, 105, 0.3);
  outline-offset: 2px;
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  background: transparent;
  color: var(--text-secondary);
  font-size: var(--font-sm);
  font-weight: 600;
  padding: var(--space-sm) var(--space-md);
  min-height: auto;
  box-shadow: none;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition-fast);
  will-change: transform;
}

.btn-ghost:hover {
  color: var(--accent);
  background: transparent;
  box-shadow: none;
  transform: translateX(4px);
}

/* ボタンのモバイル最適化 */
@media (max-width: 768px) {
  .btn,
  button[type="submit"],
  .btn-primary {
    width: 100%;
    max-width: 340px;
    padding: 17px 40px;
    min-width: auto;
    font-size: 15px;
  }

  .btn-secondary {
    width: 100%;
    max-width: 300px;
    padding: 17px 36px;
    min-width: auto;
    font-size: 15px;
  }

  .btn-icon-arrow {
    font-size: 16px;
  }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
  .btn,
  .btn-primary,
  .btn-secondary,
  .btn-ghost,
  .btn-icon-arrow {
    transition: none;
  }
}

/* ========================================
   Container & Layout
   ======================================== */

.container {
  max-width: 1280px;
  width: 100%;
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

section {
  padding: var(--space-5xl) 0;
}

#features,
#recent-posts {
  background: var(--bg-section);
}

.section-title {
  font-size: var(--font-4xl);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  color: var(--primary);
  margin-bottom: var(--space-lg);
  text-align: center;
}

.section-subtitle {
  font-size: var(--font-lg);
  color: var(--text-secondary);
  line-height: 1.7;
  text-align: center;
  margin-bottom: var(--space-3xl);
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
  font-weight: 400;
}

.label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: var(--font-xs);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-dark);
  margin-bottom: var(--space-md);
  padding: 7px 14px;
  background: var(--accent-soft);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-full);
  box-shadow: 0 1px 3px rgba(212, 175, 55, 0.1);
}

.text-center {
  text-align: center;
}

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

  section {
    padding: var(--space-3xl) 0;
  }

  .section-title {
    font-size: var(--font-3xl);
  }

  .section-subtitle {
    font-size: var(--font-md);
  }
}

/* ========================================
   Premium Cards
   ======================================== */

.card,
.article-card,
.entry-card {
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-2xl);
  padding: var(--space-2xl);
  box-shadow: 0 2px 8px rgba(15, 23, 42, 0.04), 0 1px 3px rgba(15, 23, 42, 0.02);
  transition: all var(--transition-smooth);
  position: relative;
  overflow: hidden;
  will-change: transform, box-shadow;
}

/* モバイルではbackdrop-filterを軽量化 */
@media (max-width: 768px) {
  .card,
  .article-card,
  .entry-card {
    backdrop-filter: blur(12px) saturate(180%);
    -webkit-backdrop-filter: blur(12px) saturate(180%);
  }
}

.card::before,
.article-card::before,
.entry-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--accent);
  opacity: 0;
  transition: opacity var(--transition-smooth);
}

.card::after,
.article-card::after,
.entry-card::after {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--accent-soft);
  opacity: 0;
  transition: opacity var(--transition-smooth);
  z-index: -1;
}

.card:hover,
.article-card:hover,
.entry-card:hover {
  transform: translateY(-10px) scale(1.01);
  box-shadow: 0 16px 48px rgba(15, 23, 42, 0.12), 0 8px 24px rgba(15, 23, 42, 0.06);
  border-color: var(--border-accent);
}

.card:hover::before,
.article-card:hover::before,
.entry-card:hover::before {
  opacity: 1;
}

.card:hover::after,
.article-card:hover::after,
.entry-card:hover::after {
  opacity: 1;
}

/* ========================================
   Forms
   ======================================== */

input[type="text"],
input[type="email"],
input[type="url"],
input[type="password"],
input[type="search"],
input[type="number"],
input[type="tel"],
textarea,
select {
  width: 100%;
  padding: 14px 18px;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(8px);
  border: 1.5px solid var(--border-medium);
  border-radius: var(--radius-lg);
  font-size: var(--font-md);
  color: var(--text-primary);
  transition: all var(--transition-smooth);
  font-family: inherit;
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.04);
}

input:hover,
textarea:hover,
select:hover {
  border-color: var(--border-dark);
}

input:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--accent);
  background: white;
  box-shadow: 0 0 0 4px var(--accent-soft), 0 4px 12px rgba(15, 23, 42, 0.08);
  transform: translateY(-1px);
}

textarea {
  resize: vertical;
  min-height: 140px;
  line-height: 1.75;
}

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

@media (max-width: 768px) {
  :root {
    --font-5xl: 2.5rem;
    --font-4xl: 2rem;
    --font-3xl: 1.75rem;
    --font-2xl: 1.5rem;
    --font-xl: 1.375rem;
    --font-lg: 1.1875rem;
    --space-2xl: 2rem;
    --space-3xl: 2.75rem;
    --space-4xl: 3.75rem;
    --space-5xl: 5.5rem;
  }

  body {
    font-size: var(--font-md);
    line-height: 1.8;
  }

  .container,
  .wrap,
  .container-sm {
    padding: 0 var(--space-lg);
  }

  h1 {
    line-height: 1.15;
  }

  h2 {
    line-height: 1.2;
  }

  h3 {
    line-height: 1.35;
  }

  .btn,
  button[type="submit"],
  .btn-primary,
  .btn-secondary {
    padding: 12px 24px;
    font-size: var(--font-sm);
    min-height: 48px;
  }

  /* モバイルではカードのホバー効果を軽減 */
  .card:hover,
  .article-card:hover,
  .entry-card:hover {
    transform: translateY(-5px) scale(1.005);
  }
}

/* タッチデバイスではホバー効果を抑制 */
@media (hover: none) and (pointer: coarse) {
  .card:hover,
  .article-card:hover,
  .entry-card:hover {
    transform: none;
    box-shadow: 0 2px 8px rgba(15, 23, 42, 0.04), 0 1px 3px rgba(15, 23, 42, 0.02);
  }

  .btn:hover,
  .btn-primary:hover,
  .btn-secondary:hover {
    transform: none;
  }

  /* タッチ時のフィードバック */
  .btn:active,
  .btn-primary:active,
  .btn-secondary:active {
    transform: scale(0.98);
  }
}

/* ========================================
   Utilities
   ======================================== */

.text-center {
  text-align: center;
}

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--space-sm); }
.mt-2 { margin-top: var(--space-md); }
.mt-3 { margin-top: var(--space-lg); }
.mt-4 { margin-top: var(--space-xl); }
.mt-5 { margin-top: var(--space-2xl); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--space-sm); }
.mb-2 { margin-bottom: var(--space-md); }
.mb-3 { margin-bottom: var(--space-lg); }
.mb-4 { margin-bottom: var(--space-xl); }
.mb-5 { margin-bottom: var(--space-2xl); }

/* ========================================
   Premium Accents
   ======================================== */

.accent-line {
  width: 60px;
  height: 4px;
  background: var(--accent-gradient);
  border-radius: var(--radius-full);
  margin: var(--space-lg) auto;
}

.premium-underline {
  position: relative;
  display: inline-block;
}

.premium-underline::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--accent-gradient);
  border-radius: var(--radius-full);
}

/* ========================================
   Header Styles - Managed by header.css
   ======================================== */

/* All header styles have been moved to assets/css/header.css for better organization */

.main-navigation a:hover {
  color: var(--primary);
  background: var(--accent-soft);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.1);
}

.main-navigation a:active {
  transform: translateY(0px);
  box-shadow: 0 2px 6px rgba(59, 130, 246, 0.08);
}

.main-navigation a:hover::before {
  transform: translateX(-50%) scaleX(1);
  opacity: 1;
}

.main-navigation .current-menu-item a {
  color: var(--accent-dark);
  background: var(--accent-soft);
  box-shadow: 0 2px 8px rgba(59, 130, 246, 0.12);
}

.main-navigation .current-menu-item a::before {
  transform: translateX(-50%) scaleX(1);
  opacity: 1;
}

/* Dropdown Menu Styles */
.main-navigation .menu-item-has-children {
  position: relative;
}

.main-navigation .menu-item-has-children > a::after {
  content: '';
  width: 6px;
  height: 6px;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: rotate(45deg) translateY(-2px);
  transition: transform var(--transition-normal);
  margin-left: 2px;
}

.main-navigation .menu-item-has-children:hover > a::after {
  transform: rotate(45deg) translateY(0px);
}

.main-navigation .sub-menu {
  display: none;
  position: absolute;
  top: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%) translateY(-10px);
  min-width: 240px;
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(40px) saturate(180%);
  -webkit-backdrop-filter: blur(40px) saturate(180%);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  box-shadow: 0 16px 64px rgba(15, 23, 42, 0.15), 0 4px 16px rgba(15, 23, 42, 0.08);
  padding: var(--space-sm);
  z-index: 1000;
  flex-direction: column;
  gap: 2px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 300ms cubic-bezier(0.4, 0, 0.2, 1),
              transform 300ms cubic-bezier(0.4, 0, 0.2, 1),
              visibility 300ms;
  pointer-events: none;
}

.main-navigation .menu-item-has-children:hover > .sub-menu {
  display: flex;
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
  pointer-events: auto;
}

.main-navigation .sub-menu::before {
  content: '';
  position: absolute;
  top: -6px;
  left: 50%;
  transform: translateX(-50%) rotate(45deg);
  width: 12px;
  height: 12px;
  background: white;
  border-left: 1px solid var(--border-light);
  border-top: 1px solid var(--border-light);
}

.main-navigation .sub-menu li {
  width: 100%;
}

.main-navigation .sub-menu a {
  width: 100%;
  padding: 11px 16px;
  font-size: var(--font-sm);
  border-radius: var(--radius-lg);
  justify-content: flex-start;
  opacity: 0;
  transform: translateX(-10px);
  transition: all 250ms cubic-bezier(0.4, 0, 0.2, 1);
}

.main-navigation .menu-item-has-children:hover > .sub-menu a {
  opacity: 1;
  transform: translateX(0);
}

/* Stagger effect for submenu items */
.main-navigation .sub-menu li:nth-child(1) a {
  transition-delay: 50ms;
}

.main-navigation .sub-menu li:nth-child(2) a {
  transition-delay: 100ms;
}

.main-navigation .sub-menu li:nth-child(3) a {
  transition-delay: 150ms;
}

.main-navigation .sub-menu li:nth-child(4) a {
  transition-delay: 200ms;
}

.main-navigation .sub-menu li:nth-child(5) a {
  transition-delay: 250ms;
}

.main-navigation .sub-menu a::before {
  display: none;
}

.main-navigation .sub-menu a::after {
  display: none;
}

.main-navigation .sub-menu a:hover {
  background: var(--accent-soft);
  color: var(--primary);
  transform: translateX(4px);
  box-shadow: 0 2px 8px rgba(59, 130, 246, 0.12);
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 28px;
  height: 20px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0;
  z-index: 1001;
  position: relative;
  transition: transform 200ms cubic-bezier(0.4, 0, 0.2, 1);
  /* Mobile touch optimization */
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
  user-select: none;
  -webkit-user-select: none;
}

.mobile-menu-toggle:hover {
  transform: scale(1.1);
}

.mobile-menu-toggle:active {
  transform: scale(0.95);
}

.menu-icon {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--primary);
  border-radius: var(--radius-full);
  transition: all 350ms cubic-bezier(0.4, 0, 0.2, 1);
  transform-origin: center;
}

.mobile-menu-toggle.active .menu-icon:nth-child(1) {
  transform: translateY(9px) rotate(45deg);
  background: var(--accent);
}

.mobile-menu-toggle.active .menu-icon:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.mobile-menu-toggle.active .menu-icon:nth-child(3) {
  transform: translateY(-9px) rotate(-45deg);
  background: var(--accent);
}

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

  .header-content {
    min-height: 68px;
  }

  .site-logo {
    font-size: var(--font-xl);
    letter-spacing: -0.02em;
  }

  /* Lock body scroll when menu is open */
  body.menu-open {
    overflow: hidden;
    position: fixed;
    width: 100%;
    height: 100%;
  }

  .main-navigation {
    position: fixed;
    top: 68px;
    right: 0;
    bottom: 0;
    width: 85%;
    max-width: 400px;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(40px) saturate(180%);
    -webkit-backdrop-filter: blur(40px) saturate(180%);
    padding: var(--space-xl) var(--space-lg);
    overflow-y: auto;
    overflow-x: hidden;
    z-index: 1000;
    /* Smooth scrolling for iOS */
    -webkit-overflow-scrolling: touch;
    /* Slide from right - hidden by default */
    transform: translateX(100%);
    visibility: hidden;
    opacity: 0;
    transition: transform 350ms cubic-bezier(0.4, 0, 0.2, 1),
                opacity 350ms cubic-bezier(0.4, 0, 0.2, 1),
                visibility 350ms;
    /* Custom scrollbar styling */
    scrollbar-width: thin;
    scrollbar-color: rgba(59, 130, 246, 0.3) transparent;
    box-shadow: -4px 0 20px rgba(0, 0, 0, 0.1);
  }

  .main-navigation.active {
    transform: translateX(0);
    visibility: visible;
    opacity: 1;
  }

  /* Webkit scrollbar styling */
  .main-navigation::-webkit-scrollbar {
    width: 6px;
  }

  .main-navigation::-webkit-scrollbar-track {
    background: transparent;
  }

  .main-navigation::-webkit-scrollbar-thumb {
    background: rgba(59, 130, 246, 0.3);
    border-radius: var(--radius-full);
    transition: background 250ms ease;
  }

  .main-navigation::-webkit-scrollbar-thumb:hover {
    background: rgba(59, 130, 246, 0.5);
  }

  /* Backdrop overlay */
  .menu-backdrop {
    position: fixed;
    top: 68px;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    opacity: 0;
    visibility: hidden;
    transition: opacity 350ms ease, visibility 350ms;
    z-index: 999;
  }

  .menu-backdrop.active {
    opacity: 1;
    visibility: visible;
  }

  .main-navigation ul {
    flex-direction: column;
    gap: 6px;
    width: 100%;
  }

  .main-navigation li {
    width: 100%;
  }

  .main-navigation a {
    width: 100%;
    padding: 14px 20px;
    font-size: var(--font-md);
    font-weight: 600;
    justify-content: flex-start;
    border-radius: var(--radius-lg);
    transition: all 200ms cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    /* Touch optimization */
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
    min-height: 48px;
    display: flex;
    align-items: center;
    /* Prevent iOS text size adjustment */
    -webkit-text-size-adjust: 100%;
  }

  /* Improved touch feedback */
  @media (hover: none) {
    .main-navigation a:active {
      background: var(--accent-soft);
      transform: scale(0.98);
    }
  }

  /* Mouse hover (desktop) */
  @media (hover: hover) {
    .main-navigation a:hover {
      background: var(--accent-soft);
      color: var(--accent);
      transform: translateX(4px);
      box-shadow: 0 2px 8px rgba(59, 130, 246, 0.15);
    }

    .main-navigation a:active {
      transform: scale(0.98) translateX(4px);
    }
  }

  .main-navigation a:focus {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
  }

  .main-navigation a::before {
    display: none;
  }

  /* Mobile submenu styles */
  .main-navigation .sub-menu {
    position: static;
    display: none;
    box-shadow: none;
    background: rgba(15, 23, 42, 0.03);
    backdrop-filter: none;
    margin: 6px 0 0 var(--space-lg);
    padding: var(--space-xs);
    border-radius: var(--radius-lg);
    border-left: 3px solid var(--accent);
    overflow: hidden;
    transition: all 250ms cubic-bezier(0.4, 0, 0.2, 1);
  }

  .main-navigation .sub-menu::before {
    display: none;
  }

  .main-navigation .sub-menu a {
    font-size: var(--font-sm);
    padding: 12px 16px;
    font-weight: 500;
    min-height: 44px;
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
    transition: all 200ms cubic-bezier(0.4, 0, 0.2, 1);
  }

  @media (hover: none) {
    .main-navigation .sub-menu a:active {
      background: rgba(59, 130, 246, 0.15);
      transform: scale(0.98);
    }
  }

  @media (hover: hover) {
    .main-navigation .sub-menu a:hover {
      background: rgba(59, 130, 246, 0.08);
      transform: translateX(4px);
    }
  }

  .main-navigation .menu-item-has-children.active > .sub-menu {
    display: flex;
    animation: slideDown 250ms ease-out forwards;
  }

  .main-navigation .menu-item-has-children > a {
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
    cursor: pointer;
  }

  .main-navigation .menu-item-has-children > a::after {
    margin-left: auto;
    transition: transform 300ms cubic-bezier(0.4, 0, 0.2, 1);
    font-size: 0.8em;
  }

  .main-navigation .menu-item-has-children.active > a::after {
    transform: rotate(180deg);
  }

  .main-navigation .menu-item-has-children.active > a {
    background: var(--accent-soft);
    color: var(--accent);
    font-weight: 700;
  }

  @media (hover: none) {
    .main-navigation .menu-item-has-children > a:active {
      background: var(--accent-soft);
    }
  }

  @media (hover: hover) {
    .main-navigation .menu-item-has-children > a:hover {
      background: var(--accent-soft);
    }
  }

  .mobile-menu-toggle {
    display: flex;
  }

  .kairilab-header.scrolled {
    box-shadow: 0 4px 20px rgba(15, 23, 42, 0.08), 0 2px 8px rgba(15, 23, 42, 0.04);
  }
}

/* ========================================
   Premium Footer Styles
   ======================================== */

.site-footer {
  background: var(--primary);
  color: rgba(255, 255, 255, 0.9);
  margin-top: var(--space-5xl);
  position: relative;
  overflow: hidden;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--accent-gradient);
}

.footer-container {
  max-width: var(--container-2xl);
  margin: 0 auto;
  padding: var(--space-4xl) var(--space-2xl) var(--space-2xl);
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-3xl);
  margin-bottom: var(--space-3xl);
}

.footer-brand {
  font-size: var(--font-2xl);
  font-weight: 800;
  margin-bottom: var(--space-lg);
  color: #ffffff;
  letter-spacing: -0.02em;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.footer-description {
  font-size: var(--font-sm);
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.7);
  max-width: 360px;
  margin-bottom: var(--space-md);
}

.footer-tagline {
  font-size: var(--font-xs);
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: rgba(212, 175, 55, 0.8);
  margin: 0;
}

.footer-title {
  font-size: var(--font-md);
  font-weight: 700;
  margin-bottom: var(--space-lg);
  color: white;
  letter-spacing: -0.01em;
}

.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-links li {
  margin-bottom: var(--space-sm);
}

.footer-links a {
  font-size: var(--font-sm);
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  transition: all var(--transition-fast);
  display: inline-block;
}

.footer-links a:hover {
  color: white;
  transform: translateX(4px);
}

.footer-divider {
  height: 1px;
  background: rgba(255, 255, 255, 0.15);
  margin: var(--space-2xl) 0;
}

.footer-bottom {
  text-align: center;
  padding-top: var(--space-xl);
}

.copyright {
  font-size: var(--font-xs);
  color: rgba(255, 255, 255, 0.5);
  letter-spacing: 0.02em;
}

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

  .footer-about {
    grid-column: 1 / -1;
  }
}

@media (max-width: 768px) {
  .footer-container {
    padding: var(--space-3xl) var(--space-lg) var(--space-xl);
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
  }

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

  .footer-brand {
    font-size: var(--font-xl);
  }
}

/* ========================================
   Blog Post Cards (index.php)
   ======================================== */

.blog-post-card {
  background: var(--bg-base);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  margin-bottom: var(--space-2xl);
  box-shadow: var(--shadow-sm);
  transition: var(--transition-smooth);
}

.blog-post-card:hover {
  box-shadow: var(--shadow-lg);
  border-color: var(--border-accent);
  transform: translateY(-2px);
}

.blog-post-card .entry-header {
  margin-bottom: var(--space-lg);
}

.blog-post-card .entry-title {
  font-size: var(--font-2xl);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.3;
  margin: 0 0 var(--space-md) 0;
  color: var(--primary);
}

.blog-post-card .entry-title a {
  color: var(--primary);
  text-decoration: none;
  transition: var(--transition-smooth);
}

.blog-post-card .entry-title a:hover {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.blog-post-card .entry-meta {
  display: flex;
  gap: var(--space-lg);
  flex-wrap: wrap;
  font-size: var(--font-sm);
  color: var(--text-muted);
  margin-top: var(--space-sm);
}

.blog-post-card .entry-meta a {
  color: var(--text-muted);
  text-decoration: none;
  transition: var(--transition-smooth);
  padding: var(--space-xs) var(--space-md);
  background: var(--accent-soft);
  border-radius: var(--radius-sm);
}

.blog-post-card .entry-meta a:hover {
  color: var(--accent);
  background: var(--accent-soft);
}

.blog-post-card .post-thumbnail {
  margin: var(--space-xl) 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.blog-post-card .post-thumbnail img {
  width: 100%;
  height: auto;
  display: block;
  transition: var(--transition-smooth);
}

.blog-post-card .post-thumbnail:hover img {
  transform: scale(1.02);
}

.blog-post-card .entry-content {
  font-size: var(--font-md);
  line-height: 1.8;
  color: var(--text-secondary);
}

.blog-post-card .entry-content p {
  margin-bottom: var(--space-lg);
}

.blog-post-card .read-more {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  margin-top: var(--space-lg);
  padding: var(--space-md) var(--space-xl);
  background: var(--accent-gradient);
  color: white;
  text-decoration: none;
  border-radius: var(--radius-md);
  font-weight: 700;
  font-size: var(--font-sm);
  letter-spacing: 0.02em;
  box-shadow: var(--shadow-accent);
  transition: var(--transition-smooth);
}

.blog-post-card .read-more:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.blog-post-card .entry-footer {
  margin-top: var(--space-xl);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--border-light);
}

.blog-post-card .tags-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.blog-post-card .tags-links a {
  font-size: var(--font-xs);
  color: var(--text-muted);
  background: var(--bg-surface);
  padding: var(--space-xs) var(--space-md);
  border-radius: var(--radius-full);
  text-decoration: none;
  transition: var(--transition-smooth);
  border: 1px solid var(--border-light);
}

.blog-post-card .tags-links a:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--accent-soft);
}

/* Page Header */
.page-header {
  margin-bottom: var(--space-3xl);
  text-align: center;
  padding: var(--space-2xl) 0;
}

.page-header .page-title {
  font-size: var(--font-4xl);
  font-weight: 800;
  letter-spacing: -0.02em;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin: 0;
}

/* No Results */
.no-results {
  text-align: center;
  padding: var(--space-5xl) var(--space-xl);
}

.no-results h1 {
  font-size: var(--font-3xl);
  font-weight: 800;
  color: var(--primary);
  margin-bottom: var(--space-lg);
}

.no-results p {
  font-size: var(--font-lg);
  color: var(--text-muted);
}

/* Pagination */
.pagination {
  display: flex;
  justify-content: center;
  gap: var(--space-md);
  margin: var(--space-4xl) 0;
  flex-wrap: wrap;
}

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

.pagination a,
.pagination span {
  padding: var(--space-md) var(--space-lg);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  text-decoration: none;
  color: var(--text-secondary);
  font-weight: 600;
  font-size: var(--font-sm);
  transition: var(--transition-smooth);
  background: var(--bg-base);
}

.pagination a:hover {
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: var(--shadow-sm);
}

.pagination .current {
  background: var(--accent-gradient);
  color: white;
  border-color: transparent;
  box-shadow: var(--shadow-accent);
}

/* Page Links */
.page-links {
  margin: var(--space-xl) 0;
  padding: var(--space-lg);
  background: var(--bg-surface);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-light);
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
  align-items: center;
}

.page-links a,
.page-links span {
  padding: var(--space-xs) var(--space-md);
  border-radius: var(--radius-sm);
  background: var(--bg-base);
  border: 1px solid var(--border-light);
  text-decoration: none;
  color: var(--text-secondary);
  font-size: var(--font-sm);
  transition: var(--transition-smooth);
}

.page-links a:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* ========================================
   Newsletter Form Styles
   ======================================== */

.newsletter-form {
  margin: var(--space-2xl) 0;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.newsletter-signup .form-group {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

.newsletter-input {
  flex: 1;
  min-width: 250px;
  padding: var(--space-md) var(--space-lg);
  border: 2px solid var(--border-light);
  border-radius: var(--radius-lg);
  font-size: var(--font-md);
  background: rgba(255, 255, 255, 0.95);
  transition: all var(--transition-normal);
}

.newsletter-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(212, 175, 55, 0.1);
}

.newsletter-submit {
  padding: var(--space-md) var(--space-2xl);
  white-space: nowrap;
}

.newsletter-note {
  font-size: var(--font-sm);
  color: rgba(255, 255, 255, 0.8);
  text-align: center;
  margin-top: var(--space-md);
}

.newsletter-message {
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-lg);
  text-align: center;
  font-weight: 600;
}

.newsletter-message.success {
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgb(16, 185, 129);
  color: rgb(16, 185, 129);
}

.newsletter-message.error {
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgb(239, 68, 68);
  color: rgb(239, 68, 68);
}

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

/* ========================================
   Mobile Optimization for Glassmorphism
   ======================================== */

/* Reduce backdrop-filter intensity on mobile for better performance */
@media (max-width: 768px) {
  .card,
  .article-card,
  .entry-card {
    backdrop-filter: blur(12px) saturate(140%);
    -webkit-backdrop-filter: blur(12px) saturate(140%);
  }

  .main-navigation {
    backdrop-filter: blur(20px) saturate(140%);
    -webkit-backdrop-filter: blur(20px) saturate(140%);
  }

  .cta-box {
    backdrop-filter: blur(20px) saturate(140%);
    -webkit-backdrop-filter: blur(20px) saturate(140%);
  }
}

/* Fallback for browsers that don't support backdrop-filter */
@supports not (backdrop-filter: blur(1px)) {
  .card,
  .article-card,
  .entry-card,
  .main-navigation,
  .cta-box {
    background: rgba(255, 255, 255, 0.98);
  }

  .kairilab-header {
    background: rgba(255, 255, 255, 0.98);
  }
}

/* ========================================
   Respect User Motion Preferences
   ======================================== */

/* Disable animations for users who prefer reduced motion */
@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;
  }

  .card:hover,
  .article-card:hover,
  .entry-card:hover,
  .feature-card:hover,
  .post-card:hover {
    transform: none;
  }
}

/* ========================================
   Responsive Newsletter Form
   ======================================== */

@media (max-width: 768px) {
  .newsletter-signup .form-group {
    flex-direction: column;
  }

  .newsletter-input {
    min-width: 100%;
  }

  .newsletter-submit {
    width: 100%;
  }
}

/* ========================================
   Reading Progress Bar
   ======================================== */

.reading-progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background: var(--accent-gradient-vibrant);
  width: 0%;
  transition: width 150ms ease-out;
  z-index: 9999;
  box-shadow: 0 0 8px rgba(212, 175, 55, 0.4);
}

/* ========================================
   Ripple Effect
   ======================================== */

.ripple-effect {
  position: absolute;
  border-radius: 50%;
  background: rgba(212, 175, 55, 0.3);
  transform: scale(0);
  animation: ripple-animation 600ms ease-out;
  pointer-events: none;
}

@keyframes ripple-animation {
  to {
    transform: scale(2.5);
    opacity: 0;
  }
}

/* ========================================
   Scroll to Top Button
   ======================================== */

.scroll-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 56px;
  height: 56px;
  background: var(--accent);
  color: var(--primary);
  border: none;
  border-radius: 50%;
  font-size: 24px;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 8px 24px rgba(212, 175, 55, 0.3), 0 4px 12px rgba(15, 23, 42, 0.1);
  transition: all var(--transition-smooth);
  z-index: 999;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0.9;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.scroll-to-top:hover {
  transform: translateY(-4px) scale(1.05);
  box-shadow: 0 12px 32px rgba(212, 175, 55, 0.4), 0 6px 16px rgba(15, 23, 42, 0.15);
  opacity: 1;
}

.scroll-to-top:active {
  transform: translateY(-2px) scale(1);
}

@media (max-width: 768px) {
  .scroll-to-top {
    bottom: 24px;
    right: 24px;
    width: 48px;
    height: 48px;
    font-size: 20px;
  }
}

/* ========================================
   Enhanced Link Styles
   ======================================== */

a {
  position: relative;
}

.entry-content a:not(.btn):not(.btn-primary):not(.btn-secondary),
.post-card-content a:not(.btn) {
  color: var(--accent-dark);
  text-decoration: underline;
  text-decoration-color: rgba(212, 175, 55, 0.3);
  text-underline-offset: 3px;
  text-decoration-thickness: 1.5px;
  transition: all var(--transition-fast);
}

.entry-content a:not(.btn):not(.btn-primary):not(.btn-secondary):hover,
.post-card-content a:not(.btn):hover {
  color: var(--accent);
  text-decoration-color: var(--accent);
  text-decoration-thickness: 2px;
}

/* ========================================
   Improved Selection Styling
   ======================================== */

::selection {
  background: var(--accent-soft);
  color: var(--primary);
  text-shadow: none;
}

::-moz-selection {
  background: var(--accent-soft);
  color: var(--primary);
  text-shadow: none;
}

/* ========================================
   Focus Visible States (A11y)
   ======================================== */

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

button:focus-visible,
a:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}

/* ========================================
   Skeleton Loading (Future Use)
   ======================================== */

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

.skeleton {
  background: var(--bg-surface);
  animation: skeleton-loading 1.5s ease-in-out infinite;
  border-radius: var(--radius-lg);
}

/* ========================================
   Custom Scrollbar
   ======================================== */

::-webkit-scrollbar {
  width: 12px;
  height: 12px;
}

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

::-webkit-scrollbar-thumb {
  background: var(--accent);
  border-radius: var(--radius-full);
  border: 2px solid var(--bg-section);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--accent);
}

/* Firefox scrollbar */
* {
  scrollbar-width: thin;
  scrollbar-color: var(--accent) var(--bg-section);
}

/* ========================================
   Enhanced Card Components
   ======================================== */

/* Post Card Styles */
.post-card {
  background: var(--bg-base);
  border-radius: var(--radius-xl);
  overflow: hidden;
  border: 1px solid var(--border-light);
  transition: all 400ms cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  flex-direction: column;
  height: 100%;
  box-shadow: var(--shadow-sm);
  position: relative;
  /* Touch optimization */
  -webkit-tap-highlight-color: transparent;
}

.post-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--accent-soft);
  opacity: 0;
  transition: opacity 400ms cubic-bezier(0.4, 0, 0.2, 1);
  pointer-events: none;
  z-index: 1;
}

.post-card:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: var(--shadow-xl), 0 0 0 1px var(--border-accent);
  border-color: var(--accent);
}

.post-card:hover::before {
  opacity: 1;
}

.post-card:active {
  transform: translateY(-4px) scale(1.01);
}

.post-card-thumbnail {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  transition: transform 500ms cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  z-index: 2;
}

.post-card:hover .post-card-thumbnail {
  transform: scale(1.08);
}

.post-card-thumbnail.no-image {
  /* グラデーションパターン */
  background:
    linear-gradient(135deg, var(--bg-surface) 25%, transparent 25%),
    linear-gradient(225deg, var(--bg-surface) 25%, transparent 25%),
    linear-gradient(45deg, var(--bg-surface) 25%, transparent 25%),
    linear-gradient(315deg, var(--bg-surface) 25%, var(--bg-section) 25%);
  background-size: 40px 40px;
  background-position: 0 0, 20px 0, 20px -20px, 0px 20px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.post-card-thumbnail.no-image::after {
  content: '📄';
  font-size: var(--font-4xl);
  opacity: 0.3;
}

.post-card-content {
  padding: var(--space-lg);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  flex: 1;
  position: relative;
  z-index: 2;
}

.post-card-category {
  display: inline-flex;
  align-items: center;
  align-self: flex-start;
  padding: var(--space-sm) var(--space-lg);
  background: var(--primary-soft);    /* 薄いグレー */
  color: var(--primary);              /* 濃いグレー */
  border-radius: var(--radius-full);
  font-size: var(--font-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;             /* 文字間を広げる */
  transition: all var(--transition-fast);
}

.post-card:hover .post-card-category {
  background: var(--accent-soft);
  color: var(--accent-dark);
}

.post-card-title {
  font-size: var(--font-xl);
  font-weight: 700;
  line-height: 1.3;
  margin: 0;
}

.post-card-title a {
  color: var(--text-primary);
  text-decoration: none;
  transition: color 300ms cubic-bezier(0.4, 0, 0.2, 1);
  display: inline;
  background-image: linear-gradient(to right, var(--accent) 0%, var(--accent-light) 100%);
  background-repeat: no-repeat;
  background-size: 0% 2px;
  background-position: 0 100%;
  transition: background-size 400ms cubic-bezier(0.4, 0, 0.2, 1), color 300ms;
}

.post-card:hover .post-card-title a {
  color: var(--accent-dark);
  background-size: 100% 2px;
}

.post-card-excerpt {
  font-size: var(--font-sm);
  color: var(--text-secondary);
  line-height: 1.7;
  flex: 1;
}

.post-card-meta {
  display: flex;
  gap: var(--space-md);
  font-size: var(--font-xs);
  color: var(--text-muted);
  padding-top: var(--space-sm);
  border-top: 1px solid var(--border-light);
}

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

/* Feature Card Styles */
.feature-card {
  background: var(--bg-base);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-2xl);
  padding: var(--space-2xl);
  transition: all 500ms cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  -webkit-tap-highlight-color: transparent;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 500ms cubic-bezier(0.4, 0, 0.2, 1);
}

.feature-card:hover::before {
  transform: scaleX(1);
}

.feature-card::after {
  content: '';
  position: absolute;
  top: -50%;
  right: -50%;
  width: 200%;
  height: 200%;
  background: var(--accent-soft);
  opacity: 0;
  transition: opacity 500ms cubic-bezier(0.4, 0, 0.2, 1);
  pointer-events: none;
}

.feature-card:hover {
  transform: translateY(-12px);
  box-shadow: var(--shadow-xl);
  border-color: var(--accent);
}

.feature-card:hover::after {
  opacity: 1;
}

.feature-icon {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-xl);
  background: var(--accent-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  transition: all 400ms cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  z-index: 1;
  box-shadow: var(--shadow-md);
}

.feature-card:hover .feature-icon {
  transform: rotate(10deg) scale(1.1);
  box-shadow: var(--shadow-lg), 0 0 24px rgba(212, 175, 55, 0.3);
}

/* CSS-based icons - no emojis */
.feature-icon::before {
  content: '';
  display: block;
  width: 32px;
  height: 32px;
  margin: 0 auto;
}

/* Thinking icon - abstract head with lightbulb */
.feature-icon.icon-brain::before {
  background: var(--accent);
  border-radius: 50% 50% 0 0;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  position: relative;
}

/* Science icon - beaker/flask shape */
.feature-icon.icon-science::before {
  background: var(--accent-blue);
  clip-path: polygon(30% 0%, 70% 0%, 70% 40%, 85% 100%, 15% 100%, 30% 40%);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

/* Globe icon - circular with grid */
.feature-icon.icon-globe::before {
  background: var(--primary);
  border-radius: 50%;
  box-shadow: inset 4px 4px 8px rgba(255, 255, 255, 0.2),
              inset -4px -4px 8px rgba(0, 0, 0, 0.2),
              0 2px 4px rgba(0, 0, 0, 0.1);
  border: 2px solid rgba(255, 255, 255, 0.3);
}

.feature-card .card-title {
  font-size: var(--font-2xl);
  font-weight: 700;
  margin: 0;
  color: var(--text-primary);
  position: relative;
  z-index: 1;
  transition: color 300ms cubic-bezier(0.4, 0, 0.2, 1);
}

.feature-card:hover .card-title {
  color: var(--accent-dark);
}

.feature-card .body-text {
  font-size: var(--font-sm);
  line-height: 1.7;
  color: var(--text-secondary);
  margin: 0;
  position: relative;
  z-index: 1;
}

/* Grid Layouts */
.post-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: var(--space-2xl);
  margin: var(--space-2xl) 0;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-xl);
  margin: var(--space-3xl) 0;
}

@media (max-width: 768px) {
  .post-grid,
  .feature-grid {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

  .post-card-content {
    padding: var(--space-md);
  }

  .feature-card {
    padding: var(--space-xl);
  }

  .post-card-title {
    font-size: var(--font-lg);
  }

  .feature-card .card-title {
    font-size: var(--font-xl);
  }
}

/* ========================================
   Enhanced Button Styles
   ======================================== */

.btn-primary,
.btn-secondary,
.btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  padding: var(--space-md) var(--space-xl);
  font-size: var(--font-md);
  font-weight: 600;
  line-height: 1;
  text-decoration: none;
  border-radius: var(--radius-full);
  border: none;
  cursor: pointer;
  transition: all 350ms cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
  white-space: nowrap;
  /* Touch optimization */
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
  user-select: none;
  min-height: 48px;
  min-width: 120px;
}

/* Button sizes */
.btn-sm {
  padding: var(--space-sm) var(--space-lg);
  font-size: var(--font-sm);
  min-height: 40px;
}

.btn-lg {
  padding: var(--space-lg) var(--space-2xl);
  font-size: var(--font-lg);
  min-height: 56px;
}

@media (max-width: 768px) {
  .btn-primary,
  .btn-secondary,
  .btn-ghost {
    padding: var(--space-sm) var(--space-lg);
    font-size: var(--font-sm);
  }
}

/* ========================================
   Enhanced Footer Styles
   ======================================== */

.site-footer {
  position: relative;
  overflow: hidden;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--accent);
}

.footer-container {
  max-width: var(--container-2xl);
  margin: 0 auto;
  padding: var(--space-4xl) var(--space-xl) var(--space-xl);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-3xl);
  margin-bottom: var(--space-3xl);
}

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

.footer-brand {
  font-size: var(--font-2xl);
  font-weight: 800;
  color: #ffffff;
  margin-bottom: var(--space-sm);
  letter-spacing: -0.02em;
  transition: all 400ms cubic-bezier(0.4, 0, 0.2, 1);
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.footer-brand:hover {
  color: #0080ff;
  transform: translateX(4px);
  text-shadow: 0 2px 8px rgba(0, 128, 255, 0.4);
}

.footer-description,
.footer-tagline {
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.6;
  font-size: var(--font-sm);
}

.footer-tagline {
  font-style: italic;
  color: rgba(212, 175, 55, 0.6);
  font-size: var(--font-xs);
}

.footer-title {
  font-size: var(--font-md);
  font-weight: 700;
  color: rgba(255, 255, 255, 0.95);
  margin: 0 0 var(--space-md);
  position: relative;
  padding-bottom: var(--space-sm);
}

.footer-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 40px;
  height: 2px;
  background: var(--accent-gradient);
  border-radius: var(--radius-full);
}

.footer-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer-links li {
  margin: 0;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  font-size: var(--font-sm);
  transition: all 300ms cubic-bezier(0.4, 0, 0.2, 1);
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  position: relative;
  padding-left: var(--space-sm);
}

.footer-links a::before {
  content: '→';
  position: absolute;
  left: 0;
  opacity: 0;
  transform: translateX(-8px);
  transition: all 300ms cubic-bezier(0.4, 0, 0.2, 1);
  color: var(--accent);
}

.footer-links a:hover {
  color: var(--accent-light);
  transform: translateX(8px);
}

.footer-links a:hover::before {
  opacity: 1;
  transform: translateX(0);
}

.footer-divider {
  height: 1px;
  background: rgba(255, 255, 255, 0.1);
  margin: var(--space-2xl) 0;
}

.footer-bottom {
  text-align: center;
  padding: var(--space-lg) 0;
}

.copyright {
  color: rgba(255, 255, 255, 0.5);
  font-size: var(--font-xs);
  margin: 0;
}

@media (max-width: 768px) {
  .footer-container {
    padding: var(--space-3xl) var(--space-lg) var(--space-lg);
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
  }

  .footer-section {
    text-align: left;
  }

  .footer-brand {
    font-size: var(--font-xl);
  }
}

/* ========================================
   Hero Section - Premium Ultra-Refined
   ======================================== */

.hero-section {
  position: relative;
  overflow: hidden;
  min-height: 90vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 180px 40px 160px;
  background:
    radial-gradient(circle at 30% 20%, rgba(0, 122, 255, 0.02) 0%, transparent 60%),
    radial-gradient(circle at 70% 80%, rgba(71, 85, 105, 0.03) 0%, transparent 60%),
    linear-gradient(to bottom, #fafafa 0%, #ffffff 100%);
}

.hero-section::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(0, 122, 255, 0.015) 0%, transparent 70%);
  opacity: 0.5;
  animation: float 20s ease-in-out infinite;
}

@keyframes float {
  0%, 100% {
    transform: translate(0, 0) rotate(0deg);
  }
  33% {
    transform: translate(30px, -30px) rotate(5deg);
  }
  66% {
    transform: translate(-20px, 20px) rotate(-5deg);
  }
}

.hero-section .container {
  position: relative;
  z-index: 1;
  max-width: 960px;
  margin: 0 auto;
  text-align: center;
}

.hero-label {
  display: inline-block;
  padding: 8px 20px;
  background: rgba(71, 85, 105, 0.06);
  color: #475569;
  border-radius: 9999px;
  font-size: 12px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 32px;
  box-shadow: none;
  transition: all 300ms ease;
  animation: fadeInUp 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.hero-label:hover {
  background: rgba(71, 85, 105, 0.1);
}

.hero-title {
  font-size: clamp(40px, 7vw, 80px);
  font-weight: 100;
  line-height: 1.05;
  letter-spacing: -0.03em;
  color: #0a0a0a;
  margin: 0 0 28px;
  animation: fadeInUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.1s backwards;
}

.hero-title-emphasis {
  font-weight: 300;
  color: #007aff;
  background: linear-gradient(135deg, #007aff 0%, #0066cc 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  position: relative;
  display: inline-block;
}

/* グラデーション未対応ブラウザ用フォールバック */
@supports not (background-clip: text) {
  .hero-title-emphasis {
    color: #007aff;
    background: none;
    -webkit-text-fill-color: currentColor;
  }
}

.hero-title-emphasis::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(135deg, #007aff 0%, #0066cc 100%);
  border-radius: 9999px;
  opacity: 0.2;
}

.hero-subtitle {
  font-size: clamp(18px, 2.5vw, 26px);
  font-weight: 200;
  line-height: 1.5;
  color: rgba(0, 0, 0, 0.65);
  margin: 0 0 24px;
  letter-spacing: 0.01em;
  opacity: 0.8;
  animation: fadeInUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.2s backwards;
}

.hero-description {
  font-size: 16px;
  font-weight: 300;
  line-height: 1.8;
  color: #6e6e73;
  max-width: 680px;
  margin: 0 auto 56px;
  opacity: 0.9;
  animation: fadeInUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.3s backwards;
}

.hero-cta {
  display: flex;
  gap: 14px;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  margin-top: 56px;
  animation: fadeInUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.4s backwards;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 768px) {
  .hero-section {
    min-height: 85vh;
    padding: 120px 24px 100px;
  }

  .hero-label {
    font-size: 11px;
    padding: 6px 16px;
    margin-bottom: 24px;
  }

  .hero-title {
    font-size: 36px;
    margin-bottom: 20px;
  }

  .hero-subtitle {
    font-size: 18px;
    margin-bottom: 16px;
  }

  .hero-description {
    font-size: 15px;
    margin-bottom: 40px;
  }

  .hero-cta {
    flex-direction: column;
    gap: 12px;
    margin-top: 48px;
  }
}

/* ========================================
   CTA Section Enhancements
   ======================================== */

.cta-section {
  padding: var(--space-5xl) var(--space-xl);
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--accent-soft);
  opacity: 0.5;
}

.cta-box {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
  padding: var(--space-4xl) var(--space-3xl);
  background: var(--bg-base);
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--border-light);
  position: relative;
  z-index: 1;
  transition: all 400ms cubic-bezier(0.4, 0, 0.2, 1);
}

.cta-box:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl), 0 20px 60px rgba(212, 175, 55, 0.2);
  border-color: var(--accent);
}

.cta-box h2 {
  font-size: var(--font-4xl);
  font-weight: 800;
  margin: 0 0 var(--space-lg);
  background: var(--primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.cta-box p {
  font-size: var(--font-lg);
  color: var(--text-secondary);
  margin: 0 0 var(--space-2xl);
  line-height: 1.6;
}

.cta-buttons {
  display: flex;
  gap: var(--space-lg);
  justify-content: center;
  flex-wrap: wrap;
}

@media (max-width: 768px) {
  .cta-section {
    padding: var(--space-4xl) var(--space-lg);
  }

  .cta-box {
    padding: var(--space-2xl) var(--space-lg);
  }

  .cta-box h2 {
    font-size: var(--font-2xl);
  }

  .cta-box p {
    font-size: var(--font-md);
  }

  .cta-buttons {
    flex-direction: column;
    align-items: stretch;
  }
}

/* ========================================
   Section Styles
   ======================================== */

section {
  padding: var(--space-5xl) var(--space-xl);
  position: relative;
}

.section-title {
  font-size: var(--font-4xl);
  font-weight: 800;
  margin: 0 0 var(--space-lg);
  text-align: center;
  letter-spacing: -0.02em;
  background: var(--primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-subtitle {
  font-size: var(--font-lg);
  color: var(--text-secondary);
  text-align: center;
  max-width: 700px;
  margin: 0 auto var(--space-3xl);
  line-height: 1.6;
}

.label {
  display: inline-block;
  padding: var(--space-xs) var(--space-md);
  background: var(--accent-blue);
  color: white;
  border-radius: var(--radius-full);
  font-size: var(--font-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-md);
  box-shadow: var(--shadow-md);
}

.container {
  max-width: var(--container-2xl);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.text-center {
  text-align: center;
}

@media (max-width: 768px) {
  section {
    padding: var(--space-4xl) var(--space-lg);
  }

  .section-title {
    font-size: var(--font-3xl);
  }

  .section-subtitle {
    font-size: var(--font-md);
  }

  .container {
    padding: 0 var(--space-lg);
  }
}

/* ========================================
   Utility Classes & Performance
   ======================================== */

/* Smooth transitions with GPU acceleration */
.gpu-accelerated {
  transform: translateZ(0);
  will-change: transform;
  backface-visibility: hidden;
}

/* Loading state */
.is-loading {
  pointer-events: none;
  opacity: 0.6;
  cursor: wait;
}

/* Hidden but accessible */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* ========================================
   About Page Styles - Premium Design
   ======================================== */

/* About Hero Section */
.about-hero {
  position: relative;
  min-height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 120px 40px 80px;
  background:
    radial-gradient(circle at 20% 30%, rgba(0, 122, 255, 0.02) 0%, transparent 50%),
    linear-gradient(to bottom, #fafafa 0%, #ffffff 100%);
  text-align: center;
}

.about-label {
  display: inline-block;
  padding: 6px 18px;
  background: rgba(71, 85, 105, 0.06);
  color: #475569;
  border-radius: 9999px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 24px;
  animation: fadeInUp 0.6s ease-out;
}

.about-title {
  font-size: clamp(32px, 6vw, 64px);
  font-weight: 100;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: #0a0a0a;
  margin: 0 0 24px;
  animation: fadeInUp 0.6s ease-out 0.1s backwards;
}

.about-emphasis {
  font-weight: 300;
  background: linear-gradient(135deg, #007aff 0%, #0066cc 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.about-subtitle {
  font-size: clamp(16px, 2vw, 20px);
  font-weight: 300;
  line-height: 1.6;
  color: #6e6e73;
  max-width: 600px;
  margin: 0 auto;
  animation: fadeInUp 0.6s ease-out 0.2s backwards;
}

/* About Content */
.about-content {
  padding: 80px 40px 120px;
  background: #ffffff;
}

.container-narrow {
  max-width: 800px;
  margin: 0 auto;
}

.about-section {
  margin-bottom: 80px;
  animation: fadeInUp 0.6s ease-out;
}

.section-heading {
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 300;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: #0a0a0a;
  margin: 0 0 24px;
  position: relative;
  padding-bottom: 16px;
}

.section-heading::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 60px;
  height: 2px;
  background: linear-gradient(135deg, #007aff 0%, #0066cc 100%);
  border-radius: 9999px;
}

.body-paragraph {
  font-size: 16px;
  font-weight: 300;
  line-height: 1.8;
  color: #475569;
  margin: 0 0 20px;
}

.body-paragraph strong {
  font-weight: 500;
  color: #0a0a0a;
}

.body-paragraph.closing {
  font-size: 18px;
  font-style: italic;
  color: #6e6e73;
  margin-top: 32px;
}

/* Timeline */
.timeline-section {
  margin-top: 100px;
}

.timeline {
  position: relative;
  padding-left: 40px;
  margin-top: 40px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 8px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, #007aff 0%, #0066cc 100%);
  opacity: 0.2;
}

.timeline-item {
  position: relative;
  margin-bottom: 48px;
}

.timeline-marker {
  position: absolute;
  left: -36px;
  top: 6px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #007aff;
  box-shadow: 0 0 0 4px rgba(0, 122, 255, 0.1);
}

.timeline-content {
  padding-left: 16px;
}

.timeline-title {
  font-size: 20px;
  font-weight: 500;
  color: #0a0a0a;
  margin: 0 0 8px;
}

.timeline-description {
  font-size: 15px;
  font-weight: 300;
  color: #6e6e73;
  margin: 0;
}

/* Expertise Grid */
.expertise-section {
  margin-top: 100px;
}

.expertise-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 32px;
  margin-top: 40px;
}

.expertise-card {
  padding: 32px 24px;
  background: rgba(248, 250, 252, 0.6);
  border: 1px solid rgba(0, 0, 0, 0.03);
  border-radius: 16px;
  text-align: center;
  transition: all 400ms cubic-bezier(0.16, 1, 0.3, 1);
}

.expertise-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
  border-color: rgba(0, 122, 255, 0.1);
  background: #ffffff;
}

.expertise-icon {
  font-size: 48px;
  margin-bottom: 16px;
}

.expertise-title {
  font-size: 18px;
  font-weight: 500;
  color: #0a0a0a;
  margin: 0 0 12px;
}

.expertise-description {
  font-size: 14px;
  font-weight: 300;
  line-height: 1.6;
  color: #6e6e73;
  margin: 0;
}

/* About CTA */
.about-cta {
  margin-top: 100px;
  padding: 60px 40px;
  background: rgba(248, 250, 252, 0.6);
  border: 1px solid rgba(0, 0, 0, 0.03);
  border-radius: 24px;
  text-align: center;
}

.cta-heading {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 300;
  letter-spacing: -0.01em;
  color: #0a0a0a;
  margin: 0 0 16px;
}

.cta-text {
  font-size: 16px;
  font-weight: 300;
  line-height: 1.7;
  color: #6e6e73;
  margin: 0 0 40px;
}

.cta-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* Mobile Optimization */
@media (max-width: 768px) {
  .about-hero {
    min-height: 50vh;
    padding: 100px 24px 60px;
  }

  .about-title {
    font-size: 32px;
  }

  .about-subtitle {
    font-size: 16px;
  }

  .about-content {
    padding: 60px 24px 80px;
  }

  .about-section {
    margin-bottom: 60px;
  }

  .section-heading {
    font-size: 24px;
  }

  .body-paragraph {
    font-size: 15px;
  }

  .timeline {
    padding-left: 32px;
  }

  .timeline-marker {
    left: -30px;
  }

  .expertise-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .about-cta {
    padding: 40px 24px;
  }

  .cta-buttons {
    flex-direction: column;
  }

  .cta-buttons .btn-primary,
  .cta-buttons .btn-secondary {
    width: 100%;
    max-width: 320px;
  }
}



/* ========================================
   Utility Classes
   ======================================== */

/* Spacing Utilities */
.mt-xs { margin-top: var(--space-xs); }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }
.mt-2xl { margin-top: var(--space-2xl); }
.mt-3xl { margin-top: var(--space-3xl); }

.mb-xs { margin-bottom: var(--space-xs); }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }
.mb-2xl { margin-bottom: var(--space-2xl); }
.mb-3xl { margin-bottom: var(--space-3xl); }

.pt-xs { padding-top: var(--space-xs); }
.pt-sm { padding-top: var(--space-sm); }
.pt-md { padding-top: var(--space-md); }
.pt-lg { padding-top: var(--space-lg); }
.pt-xl { padding-top: var(--space-xl); }
.pt-2xl { padding-top: var(--space-2xl); }
.pt-3xl { padding-top: var(--space-3xl); }

.pb-xs { padding-bottom: var(--space-xs); }
.pb-sm { padding-bottom: var(--space-sm); }
.pb-md { padding-bottom: var(--space-md); }
.pb-lg { padding-bottom: var(--space-lg); }
.pb-xl { padding-bottom: var(--space-xl); }
.pb-2xl { padding-bottom: var(--space-2xl); }
.pb-3xl { padding-bottom: var(--space-3xl); }

/* Text Alignment */
.text-left { text-align: left; }
.text-center { text-align: center; }
.text-right { text-align: right; }

/* Display */
.flex { display: flex; }
.inline-flex { display: inline-flex; }
.block { display: block; }
.inline-block { display: inline-block; }
.hidden { display: none; }

/* Flex Utilities */
.flex-row { flex-direction: row; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.items-end { align-items: flex-end; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.justify-around { justify-content: space-around; }
.flex-wrap { flex-wrap: wrap; }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }
.gap-xl { gap: var(--space-xl); }

/* ========================================
   Scroll Animations
   ======================================== */

/* Fade In Up Animation */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(40px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Fade In Animation */
@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

/* Slide In from Right */
@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(40px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* Slide In from Left */
@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-40px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* Animation Classes */
.animate-fade-in-up {
  animation: fadeInUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.animate-fade-in {
  animation: fadeIn 0.6s ease-out forwards;
}

.animate-slide-in-right {
  animation: slideInRight 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.animate-slide-in-left {
  animation: slideInLeft 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

/* Animation Delays */
.delay-100 { animation-delay: 100ms; }
.delay-200 { animation-delay: 200ms; }
.delay-300 { animation-delay: 300ms; }
.delay-400 { animation-delay: 400ms; }
.delay-500 { animation-delay: 500ms; }

/* Initial state for animated elements */
.will-animate {
  opacity: 0;
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
  .animate-fade-in-up,
  .animate-fade-in,
  .animate-slide-in-right,
  .animate-slide-in-left {
    animation: none;
    opacity: 1;
    transform: none;
  }

  .will-animate {
    opacity: 1;
  }
}

/* ========================================
   Contact Form 7 Custom Styles
   ======================================== */

/* Contact Page Sections */
.contact-page {
  background: var(--bg-base);
}

.contact-hero {
  padding: var(--space-5xl) 0 var(--space-4xl);
  background: var(--bg-gradient);
  text-align: center;
}

.contact-hero .label {
  display: inline-block;
  font-size: var(--font-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--accent);
  margin-bottom: var(--space-md);
}

.contact-hero .page-title {
  font-size: var(--font-5xl);
  font-weight: 700;
  line-height: 1.1;
  color: var(--text-primary);
  margin-bottom: var(--space-lg);
  letter-spacing: -0.02em;
}

.contact-hero .page-subtitle {
  font-size: var(--font-md);
  line-height: 1.8;
  color: var(--text-secondary);
  max-width: 640px;
  margin: 0 auto;
}

.contact-form-section {
  padding: var(--space-5xl) 0;
}

.contact-form-wrapper {
  background: var(--bg-base);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-2xl);
  padding: var(--space-3xl);
  margin-bottom: var(--space-4xl);
  box-shadow: var(--shadow-sm);
}

.contact-direct-info {
  text-align: center;
  padding: var(--space-3xl) var(--space-2xl);
  background: var(--bg-surface);
  border-radius: var(--radius-xl);
  margin-bottom: var(--space-2xl);
}

.contact-direct-info .section-heading {
  font-size: var(--font-2xl);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-md);
}

.contact-direct-info .body-paragraph {
  font-size: var(--font-md);
  line-height: 1.8;
  color: var(--text-secondary);
  margin-bottom: var(--space-lg);
}

.contact-email {
  margin-top: var(--space-xl);
}

.contact-notice {
  text-align: center;
  padding: var(--space-xl);
  background: var(--accent-soft);
  border-left: 4px solid var(--accent);
  border-radius: var(--radius-md);
}

.contact-notice .notice-text {
  font-size: var(--font-sm);
  line-height: 1.8;
  color: var(--text-secondary);
  margin: 0;
}

/* Contact Form 7 Form Styles */
.wpcf7 {
  width: 100%;
}

.wpcf7-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
}

.wpcf7-form p {
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.wpcf7-form label {
  font-size: var(--font-sm);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-xs);
}

.wpcf7-form-control-wrap {
  display: block;
  width: 100%;
}

/* Input Fields */
.wpcf7-form input[type="text"],
.wpcf7-form input[type="email"],
.wpcf7-form input[type="tel"],
.wpcf7-form input[type="url"],
.wpcf7-form textarea,
.wpcf7-form select {
  width: 100%;
  padding: var(--space-md) var(--space-lg);
  font-size: var(--font-md);
  line-height: 1.5;
  color: var(--text-primary);
  background: var(--bg-base);
  border: 1.5px solid var(--border-medium);
  border-radius: var(--radius-md);
  transition: all 0.2s ease;
  font-family: inherit;
}

.wpcf7-form input[type="text"]:focus,
.wpcf7-form input[type="email"]:focus,
.wpcf7-form input[type="tel"]:focus,
.wpcf7-form input[type="url"]:focus,
.wpcf7-form textarea:focus,
.wpcf7-form select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.wpcf7-form textarea {
  min-height: 180px;
  resize: vertical;
}

/* Submit Button */
.wpcf7-form input[type="submit"] {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-md) var(--space-3xl);
  font-size: var(--font-md);
  font-weight: 600;
  color: var(--text-white);
  background: var(--accent);
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: var(--shadow-sm);
  text-decoration: none;
  min-width: 160px;
}

.wpcf7-form input[type="submit"]:hover {
  background: var(--accent-dark);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.wpcf7-form input[type="submit"]:active {
  transform: translateY(0);
  box-shadow: var(--shadow-sm);
}

/* Validation Messages */
.wpcf7-not-valid-tip {
  font-size: var(--font-xs);
  color: #dc2626;
  margin-top: var(--space-xs);
}

.wpcf7-form .wpcf7-not-valid {
  border-color: #dc2626;
}

.wpcf7-response-output {
  margin: var(--space-xl) 0 0;
  padding: var(--space-lg);
  border-radius: var(--radius-md);
  font-size: var(--font-sm);
  line-height: 1.6;
}

.wpcf7-mail-sent-ok {
  background: #d1fae5;
  color: #065f46;
  border: 1px solid #6ee7b7;
}

.wpcf7-validation-errors,
.wpcf7-mail-sent-ng {
  background: #fee2e2;
  color: #991b1b;
  border: 1px solid #fca5a5;
}

.wpcf7-spam-blocked {
  background: #fef3c7;
  color: #92400e;
  border: 1px solid #fcd34d;
}

/* Loading Spinner */
.wpcf7-spinner {
  margin-left: var(--space-md);
  display: inline-block;
}

/* Accessibility */
.wpcf7-form .screen-reader-response {
  position: absolute;
  overflow: hidden;
  clip: rect(1px, 1px, 1px, 1px);
  clip-path: inset(50%);
  height: 1px;
  width: 1px;
  margin: -1px;
  padding: 0;
  border: 0;
}

/* Responsive Design */
@media (max-width: 768px) {
  .contact-hero {
    padding: var(--space-4xl) 0 var(--space-3xl);
  }

  .contact-hero .page-title {
    font-size: var(--font-4xl);
  }

  .contact-hero .page-subtitle {
    font-size: var(--font-sm);
  }

  .contact-form-wrapper {
    padding: var(--space-2xl) var(--space-xl);
  }

  .contact-direct-info {
    padding: var(--space-2xl) var(--space-lg);
  }

  .wpcf7-form input[type="submit"] {
    width: 100%;
  }
}

@media (max-width: 480px) {
  .contact-hero .page-title {
    font-size: var(--font-3xl);
  }

  .contact-form-wrapper {
    padding: var(--space-xl);
  }
}

/* ========================================
   Article Thumbnail Placeholder Styles
   ======================================== */

/* Thumbnail Base */
.article-thumbnail,
.post-card-thumbnail {
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  overflow: hidden;
  position: relative;
}

.article-thumbnail img,
.post-card-thumbnail img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-normal);
}

.article-card:hover .article-thumbnail img,
.post-card:hover .post-card-thumbnail img {
  transform: scale(1.05);
}

/* Placeholder (no image) */
.article-thumbnail-placeholder,
.post-card-thumbnail.no-image {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

/* Gradient Variations */
.article-thumbnail-placeholder[data-variant="1"],
.post-card-thumbnail.no-image[data-variant="1"] {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.article-thumbnail-placeholder[data-variant="2"],
.post-card-thumbnail.no-image[data-variant="2"] {
  background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

.article-thumbnail-placeholder[data-variant="3"],
.post-card-thumbnail.no-image[data-variant="3"] {
  background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}

.article-thumbnail-placeholder[data-variant="4"],
.post-card-thumbnail.no-image[data-variant="4"] {
  background: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
}

.article-thumbnail-placeholder[data-variant="5"],
.post-card-thumbnail.no-image[data-variant="5"] {
  background: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
}

/* Title Letter Display */
.thumbnail-letter {
  font-size: 6rem;
  font-weight: 800;
  color: rgba(255, 255, 255, 0.3);
  line-height: 1;
  user-select: none;
  pointer-events: none;
}

/* Decorative Pattern */
.article-thumbnail-placeholder::before,
.post-card-thumbnail.no-image::before {
  content: '';
  position: absolute;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(255,255,255,0.1) 1px, transparent 1px);
  background-size: 30px 30px;
  opacity: 0.5;
  animation: drift 20s linear infinite;
}

@keyframes drift {
  0% { transform: translate(0, 0); }
  100% { transform: translate(50px, 50px); }
}

/* ========================================
   Articles Page Styles
   ======================================== */

/* Articles Hero Section */
.articles-hero {
  padding: var(--space-5xl) 0 var(--space-3xl);
  background: var(--bg-gradient);
  text-align: center;
}

.articles-hero .hero-title {
  font-size: var(--font-5xl);
  font-weight: 700;
  line-height: 1.1;
  color: var(--text-primary);
  margin-bottom: var(--space-md);
  letter-spacing: -0.02em;
}

.articles-hero .hero-subtitle {
  font-size: var(--font-xl);
  font-weight: 300;
  line-height: 1.6;
  color: var(--text-secondary);
  max-width: 700px;
  margin: 0 auto;
}

/* Filter Section */
.articles-filter {
  padding: var(--space-2xl) 0;
  background: var(--bg-base);
  border-bottom: 1px solid var(--border-light);
}

.filter-tabs {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
  flex-wrap: wrap;
}

.filter-tab {
  padding: var(--space-sm) var(--space-xl);
  background: transparent;
  color: var(--text-secondary);
  border: 1.5px solid var(--border-medium);
  border-radius: var(--radius-full);
  font-size: var(--font-sm);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.filter-tab:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-soft);
}

.filter-tab.active {
  background: var(--accent);
  color: var(--text-white);
  border-color: var(--accent);
}

/* Articles Grid Section */
.articles-grid-section {
  padding: var(--space-5xl) 0;
  background: var(--bg-base);
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: var(--space-2xl);
}

/* Article Card */
.article-card {
  background: var(--bg-base);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: all var(--transition-normal);
  position: relative;
  display: flex;
  flex-direction: column;
}

.article-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--border-medium);
}

.article-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--accent-gradient);
  opacity: 0;
  transition: opacity var(--transition-fast);
  z-index: 1;
}

.article-card:hover::before {
  opacity: 1;
}

.article-link {
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
  height: 100%;
}

.article-content {
  padding: var(--space-xl);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.article-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-md);
  gap: var(--space-md);
}

.article-meta .label {
  font-size: var(--font-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: var(--space-xs) var(--space-md);
  background: var(--primary-soft);
  color: var(--primary);
  border-radius: var(--radius-sm);
  white-space: nowrap;
}

.article-date {
  font-size: var(--font-xs);
  color: var(--text-muted);
  white-space: nowrap;
}

.article-title {
  font-size: var(--font-xl);
  font-weight: 600;
  line-height: 1.4;
  color: var(--text-primary);
  margin-bottom: var(--space-sm);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-card:hover .article-title {
  color: var(--accent);
}

.article-excerpt {
  font-size: var(--font-sm);
  line-height: 1.7;
  color: var(--text-secondary);
  margin-bottom: var(--space-md);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  flex: 1;
}

.article-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--space-md);
  border-top: 1px solid var(--border-light);
}

.read-time {
  font-size: var(--font-xs);
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.read-time::before {
  content: '📖';
  font-size: var(--font-sm);
}

/* Pagination */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-md);
  margin-top: var(--space-4xl);
  flex-wrap: wrap;
}

.pagination-btn {
  padding: var(--space-sm) var(--space-lg);
  background: transparent;
  color: var(--text-secondary);
  border: 1.5px solid var(--border-medium);
  border-radius: var(--radius-md);
  font-size: var(--font-sm);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.pagination-btn:hover:not(:disabled) {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-soft);
}

.pagination-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.pagination-numbers {
  display: flex;
  gap: var(--space-sm);
}

.pagination-number {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  color: var(--text-secondary);
  border: 1.5px solid var(--border-medium);
  border-radius: var(--radius-md);
  font-size: var(--font-sm);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.pagination-number:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-soft);
}

.pagination-number.active {
  background: var(--accent);
  color: var(--text-white);
  border-color: var(--accent);
}

/* WordPress Pagination */
.pagination .page-numbers {
  padding: var(--space-sm) var(--space-lg);
  background: transparent;
  color: var(--text-secondary);
  border: 1.5px solid var(--border-medium);
  border-radius: var(--radius-md);
  font-size: var(--font-sm);
  font-weight: 500;
  text-decoration: none;
  transition: all var(--transition-fast);
}

.pagination .page-numbers:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-soft);
}

.pagination .page-numbers.current {
  background: var(--accent);
  color: var(--text-white);
  border-color: var(--accent);
}

.pagination .page-numbers.dots {
  border: none;
}

/* Responsive Design */
@media (max-width: 768px) {
  .articles-hero {
    padding: var(--space-4xl) 0 var(--space-2xl);
  }

  .articles-hero .hero-title {
    font-size: var(--font-4xl);
  }

  .articles-hero .hero-subtitle {
    font-size: var(--font-md);
  }

  .articles-grid {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }

  .filter-tabs {
    gap: var(--space-sm);
  }

  .filter-tab {
    padding: var(--space-xs) var(--space-md);
    font-size: var(--font-xs);
  }

  .article-content {
    padding: var(--space-lg);
  }

  .thumbnail-letter {
    font-size: 4rem;
  }
}

@media (max-width: 480px) {
  .articles-hero .hero-title {
    font-size: var(--font-3xl);
  }

  .article-title {
    font-size: var(--font-lg);
  }

  .thumbnail-letter {
    font-size: 3rem;
  }
}

/* ========================================
   About Page Enhanced Styles
   ======================================== */

/* Expertise Section Enhancement */
.expertise-section {
  margin-top: var(--space-4xl);
}

.expertise-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-xl);
  margin-top: var(--space-xl);
}

.expertise-card {
  padding: var(--space-2xl);
  background: var(--bg-base);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  transition: all var(--transition-normal);
  position: relative;
}

.expertise-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--accent-gradient);
  border-radius: var(--radius-xl) 0 0 var(--radius-xl);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.expertise-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--border-medium);
}

.expertise-card:hover::before {
  opacity: 1;
}

.expertise-title {
  font-size: var(--font-xl);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-md);
  line-height: 1.3;
}

.expertise-description {
  font-size: var(--font-sm);
  line-height: 1.7;
  color: var(--text-secondary);
}

/* Timeline Section Enhancement */
.timeline-section {
  margin-top: var(--space-4xl);
}

.timeline {
  position: relative;
  padding-left: var(--space-2xl);
  margin-top: var(--space-xl);
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--border-light);
}

.timeline-item {
  position: relative;
  margin-bottom: var(--space-2xl);
}

.timeline-item:last-child {
  margin-bottom: 0;
}

.timeline-marker {
  position: absolute;
  left: calc(-1 * var(--space-2xl) - 5px);
  top: 8px;
  width: 12px;
  height: 12px;
  background: var(--accent);
  border: 2px solid var(--bg-base);
  border-radius: 50%;
  box-shadow: 0 0 0 2px var(--accent-soft);
}

.timeline-title {
  font-size: var(--font-lg);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-xs);
}

.timeline-description {
  font-size: var(--font-sm);
  color: var(--text-secondary);
  line-height: 1.6;
}

/* About CTA Enhancement */
.about-cta {
  margin-top: var(--space-5xl);
  padding: var(--space-4xl) var(--space-3xl);
  background: var(--bg-gradient);
  border-radius: var(--radius-2xl);
  text-align: center;
}

.cta-heading {
  font-size: var(--font-3xl);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-lg);
}

.cta-text {
  font-size: var(--font-md);
  line-height: 1.8;
  color: var(--text-secondary);
  margin-bottom: var(--space-2xl);
}

.cta-buttons {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
  flex-wrap: wrap;
}

/* Responsive Design for About Page */
@media (max-width: 768px) {
  .expertise-grid {
    grid-template-columns: 1fr;
  }

  .about-cta {
    padding: var(--space-3xl) var(--space-2xl);
  }

  .cta-heading {
    font-size: var(--font-2xl);
  }

  .cta-buttons {
    flex-direction: column;
  }

  .cta-buttons .btn-primary,
  .cta-buttons .btn-secondary {
    width: 100%;
  }
}

/* ========================================
   Force Remove All Icon Fonts
   ======================================== */

/* Remove Font Awesome and other icon fonts */
.fa,
.fas,
.far,
.fal,
.fab,
[class*="icon-"],
[class^="icon-"],
.material-icons,
.dashicons,
.glyphicon {
  display: none !important;
}

/* Remove pseudo-element icons from About page */
.expertise-icon {
  display: none !important;
  visibility: hidden !important;
  opacity: 0 !important;
  height: 0 !important;
  width: 0 !important;
  margin: 0 !important;
  padding: 0 !important;
}

/* Prevent any icon insertion via pseudo-elements */
.expertise-card .expertise-icon::before,
.expertise-card .expertise-icon::after,
.feature-item::before,
.section-heading::before,
.expertise-title::before {
  content: none !important;
  display: none !important;
}

/* Ensure no icon fonts are loaded */
@font-face {
  font-family: 'FontAwesome';
  src: none !important;
}

@font-face {
  font-family: 'dashicons';
  src: none !important;
}

/* Remove any list style icons */
.expertise-grid li::before,
.features-list li::before,
ul.features li::before {
  content: none !important;
  display: none !important;
}

/* ========================================
   About Page Redesign Styles
   ======================================== */

.about-hero {
  padding: var(--space-4xl) var(--space-xl) var(--space-2xl);
  background: var(--bg-gradient);
  text-align: center;
}

.container-sm {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.section-title {
  font-size: var(--font-4xl);
  font-weight: 700;
  line-height: 1.2;
  color: var(--text-primary);
  margin-bottom: var(--space-lg);
}

.section-subtitle {
  font-size: var(--font-xl);
  font-weight: 300;
  line-height: 1.6;
  color: var(--text-secondary);
  max-width: 700px;
  margin: 0 auto;
}

.about-content {
  padding: var(--space-4xl) 0;
}

.content-block {
  margin-bottom: var(--space-4xl);
}

.content-block:last-child {
  margin-bottom: 0;
}

.content-title {
  font-size: var(--font-3xl);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-md);
  border-bottom: 2px solid var(--border-light);
}

.body-text {
  font-size: var(--font-sm);
  font-weight: 400;
  line-height: 1.7;
  color: var(--text-secondary);
  margin-bottom: var(--space-md);
}

.body-text:last-child {
  margin-bottom: 0;
}

/* Features List */
.features-list {
  display: grid;
  gap: var(--space-xl);
  margin-top: var(--space-xl);
}

.feature-item {
  padding: var(--space-xl);
  background: var(--bg-surface);
  border-radius: var(--radius-lg);
  border-left: 3px solid var(--accent);
  transition: all var(--transition-fast);
}

.feature-item:hover {
  transform: translateX(4px);
  box-shadow: var(--shadow-sm);
}

.feature-title {
  font-size: var(--font-lg);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-sm);
}

/* Expertise Grid Redesign */
.expertise-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-xl);
  margin-top: var(--space-xl);
}

.expertise-card {
  padding: var(--space-xl);
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(15px);
  -webkit-backdrop-filter: blur(15px);
  border: 0.5px solid var(--border-light);
  border-radius: var(--radius-xl);
  transition: all var(--transition-fast);
}

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

.expertise-card .card-title {
  font-size: var(--font-xl);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-md);
}

/* アイコンの強制非表示 */
.about-content .fa,
.about-content .fas,
.about-content .far,
.about-content .fal,
.about-content .fab,
.about-content [class*="icon-"],
.about-content .material-icons,
.about-content .dashicons {
  display: none !important;
}

.about-content h2::before,
.about-content h3::before,
.about-content .expertise-card::before,
.about-content .feature-item::before {
  content: none !important;
  display: none !important;
}

/* Responsive */
@media (max-width: 768px) {
  .section-title {
    font-size: var(--font-3xl);
  }

  .content-title {
    font-size: var(--font-2xl);
  }

  .expertise-grid {
    grid-template-columns: 1fr;
  }

  .container-sm {
    padding: 0 var(--space-md);
  }

  .about-hero {
    padding: var(--space-3xl) var(--space-md) var(--space-xl);
  }
}

/* ========================================
   Custom Contact Form Styles
   ======================================== */

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

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

.form-group label {
  font-size: var(--font-sm);
  font-weight: 600;
  color: var(--text-primary);
}

.form-group .required {
  color: #dc2626;
  margin-left: var(--space-xs);
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group textarea {
  width: 100%;
  padding: var(--space-md) var(--space-lg);
  font-size: var(--font-md);
  line-height: 1.5;
  color: var(--text-primary);
  background: var(--bg-base);
  border: 1.5px solid var(--border-medium);
  border-radius: var(--radius-md);
  transition: all 0.2s ease;
  font-family: inherit;
}

.form-group input[type="text"]:focus,
.form-group input[type="email"]:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.form-group textarea {
  min-height: 180px;
  resize: vertical;
}

.form-submit {
  margin-top: var(--space-md);
}

.form-submit button[type="submit"] {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-md) var(--space-3xl);
  font-size: var(--font-md);
  font-weight: 600;
  color: var(--text-white);
  background: var(--accent);
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: var(--shadow-sm);
  min-width: 160px;
}

.form-submit button[type="submit"]:hover {
  background: var(--accent-dark);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.form-submit button[type="submit"]:active {
  transform: translateY(0);
  box-shadow: var(--shadow-sm);
}

@media (max-width: 768px) {
  .form-submit button[type="submit"] {
    width: 100%;
  }
}

/* テーブル・コードブロック */
.article-body table,
.entry-content table {
  width: 100%;
  margin: 2rem 0;
  border-collapse: collapse;
  background: #fff;
  border: 1px solid #e2e8f0;
}

.article-body th,
.entry-content th,
.article-body td,
.entry-content td {
  padding: 0.75rem 1rem;
  border: 1px solid #e2e8f0;
  text-align: left;
}

.article-body th,
.entry-content th {
  background: #f8fafc;
  font-weight: 600;
}

.article-body pre,
.entry-content pre {
  background: #1e293b;
  color: #e2e8f0;
  padding: 1rem;
  border-radius: 0.5rem;
  overflow-x: auto;
  margin: 1.5rem 0;
  font-family: monospace;
  font-size: 0.9rem;
  line-height: 1.6;
}

.article-body code,
.entry-content code {
  background: #f1f5f9;
  padding: 0.2em 0.4em;
  border-radius: 0.25rem;
  font-family: monospace;
  font-size: 0.9em;
}

.article-body pre code,
.entry-content pre code {
  background: none;
  padding: 0;
  color: inherit;
}