/* ========================================
   株式会社無垢 - 共通スタイルシート
   ======================================== */

/* ========================================
   CSS Variables
   ======================================== */
:root {
  /* カラー（洗練されたニュートラル） */
  --primary-color: #337ab7;
  --secondary-color: #27ae60;
  --accent-color: #2563eb;

  --text-dark: #1a1a1a;
  --text-body: #444444;
  --text-light: #666666;
  --text-lighter: #999999;
  --text-white: #ffffff;

  --bg-white: #ffffff;
  --bg-light: #f8f9fa;
  --bg-lighter: #f4f5f7;
  --bg-dark: #2c3e50;

  --border-color: #e5e7eb;
  --border-light: #f0f0f0;

  /* フォント */
  --font-size-base: 16px;
  --font-size-small: 14px;
  --font-size-large: 18px;
  --font-size-xlarge: 24px;
  --font-size-xxlarge: 32px;

  /* スペーシング */
  --spacing-small: 8px;
  --spacing-medium: 16px;
  --spacing-large: 32px;
  --spacing-xlarge: 64px;

  /* その他 */
  --border-radius: 4px;
  --transition-speed: 0.3s;
  --max-width: 1200px;
}

/* ========================================
   Reset & Base Styles
   ======================================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family:
    -apple-system, BlinkMacSystemFont,
    "Segoe UI", "Hiragino Sans", "Hiragino Kaku Gothic ProN",
    "Noto Sans JP", Meiryo, sans-serif;
  line-height: 2.0;
  color: var(--text-body);
  background-color: var(--bg-white);
  font-size: 16px;
  padding-top: 80px;
  letter-spacing: 0.02em;
}

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

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

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

/* ========================================
   Container
   ======================================== */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-medium);
}

/* ========================================
   Header (Lightning Theme Style)
   ======================================== */
.site-header {
  background-color: var(--bg-white);
  border-bottom: 1px solid var(--border-color);
  padding: var(--spacing-medium) 0;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  width: 100%;
  z-index: 1000;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.site-header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.site-header-logo {
  margin: 0;
  font-size: 1.5rem;
  font-weight: bold;
}

.site-header-logo a {
  color: var(--text-dark);
  text-decoration: none;
}

.site-header-logo span {
  display: block;
  font-family: "HG平成明朝体W9", "游明朝", "Yu Mincho", "Noto Serif JP", serif;
  font-weight: 900;
  -webkit-text-stroke: 0.6px currentColor;
  paint-order: stroke fill;
  letter-spacing: 0.02em;
}

/* Global Navigation (Lightning Theme Style) */
.global-nav {
  margin: 0 !important;
  display: block !important;
  position: static !important;
}

/* デスクトップではモバイル専用項目を非表示 */
.mobile-only {
  display: none !important;
}

.global-nav-list {
  list-style: none !important;
  display: flex !important;
  gap: 0 !important;
  margin: 0 !important;
  padding: 0 !important;
}

.global-nav-list > .menu-item {
  position: relative;
}

.global-nav-list > .menu-item > a {
  color: var(--text-dark);
  font-weight: 400;
  padding: var(--spacing-medium) var(--spacing-large);
  display: block;
  transition: all var(--transition-speed);
  text-decoration: none;
}

.global-nav-list > .menu-item > a:hover {
  color: var(--primary-color);
  background-color: var(--bg-light);
}

.global-nav-name {
  font-size: 0.95rem;
}

/* Submenu */
.menu-item-has-children {
  position: relative;
}

.sub-menu {
  position: absolute;
  top: 100%;
  left: 0;
  background-color: var(--bg-white);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  border: 1px solid var(--border-color);
  min-width: 250px;
  list-style: none;
  margin: 0;
  padding: 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all 0.3s ease;
  z-index: 100;
}

.menu-item-has-children:hover > .sub-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.sub-menu li {
  border-bottom: 1px solid var(--border-color);
}

.sub-menu li:last-child {
  border-bottom: none;
}

.sub-menu a {
  padding: var(--spacing-medium);
  display: block;
  color: var(--text-dark);
  text-decoration: none;
  transition: all var(--transition-speed);
  font-size: 0.9rem;
}

.sub-menu a:hover {
  background-color: var(--bg-light);
  color: var(--primary-color);
  padding-left: calc(var(--spacing-medium) + 5px);
}

/* Nested submenu (for language selection, etc.) */
.sub-menu .menu-item-has-children {
  position: relative;
}

.sub-menu .menu-item-has-children > a::after {
  content: '←';
  margin-left: 8px;
  font-size: 0.85em;
  opacity: 0.6;
}

.nested-sub-menu {
  position: absolute;
  top: 0;
  right: 100%;
  margin-right: 0;
  min-width: 180px;
}

.sub-menu .menu-item-has-children:hover > .nested-sub-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

/* Accordion button (for mobile - hidden on desktop) */
.acc-btn {
  display: none;
  width: 40px;
  height: 40px;
  cursor: pointer;
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
}

.acc-btn::before {
  content: '+';
  font-size: 24px;
  color: var(--text-dark);
}

.menu-item-has-children.active .acc-btn::before {
  content: '−';
}

/* ハンバーガーメニュー（モバイル用） */
.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  padding: 8px;
  cursor: pointer;
  z-index: 1001;
}

.hamburger-icon {
  display: flex;
  flex-direction: column;
  width: 28px;
  height: 22px;
  justify-content: space-between;
}

.hamburger-icon span {
  display: block;
  height: 3px;
  width: 100%;
  background-color: var(--text-dark);
  border-radius: 3px;
  transition: all 0.3s ease;
}

.mobile-menu-toggle.active .hamburger-icon span:nth-child(1) {
  transform: rotate(45deg) translate(6px, 6px);
}

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

.mobile-menu-toggle.active .hamburger-icon span:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -8px);
}

/* ========================================
   Main Content
   ======================================== */
main {
  min-height: 60vh;
}

/* ヒーローセクション */
.hero {
  background-color: var(--bg-light);
  padding: var(--spacing-xlarge) 0;
  text-align: center;
}

.hero h1 {
  font-size: var(--font-size-xxlarge);
  margin-bottom: var(--spacing-medium);
  color: var(--text-dark);
}

.hero p {
  font-size: var(--font-size-large);
  color: var(--text-light);
  margin-bottom: var(--spacing-large);
}

/* セクション */
.section {
  padding: 96px 0;
}

.section-title {
  font-size: 36px;
  font-weight: 700;
  margin-bottom: 48px;
  text-align: center;
  color: var(--text-dark);
  letter-spacing: -0.02em;
  line-height: 1.3;
}

.section-content {
  max-width: 800px;
  margin: 0 auto;
  line-height: 1.8;
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
  color: white;
  padding: 80px 0;
  position: relative;
  z-index: 1;
}

.hero h1 {
  font-size: 48px;
  font-weight: 700;
  margin-bottom: 20px;
  letter-spacing: -0.5px;
}

.hero p {
  font-size: 20px;
  opacity: 0.95;
  font-weight: 300;
}

/* ========================================
   Buttons
   ======================================== */
.btn {
  display: inline-block;
  padding: 14px 32px;
  background-color: var(--primary-color);
  color: var(--text-white);
  border: none;
  border-radius: 6px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  text-align: center;
  letter-spacing: 0.02em;
}

.btn:hover {
  background-color: var(--accent-color);
  color: var(--text-white);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.2);
}

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

.btn-secondary:hover {
  background-color: #229954;
}

.btn-outline {
  background-color: transparent;
  border: 2px solid var(--primary-color);
  color: var(--primary-color);
}

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

/* ========================================
   Footer (Lightning Theme Style)
   ======================================== */
.site-footer {
  background-color: #f5f5f5;
  color: var(--text-dark);
  padding: var(--spacing-large) 0;
  margin-top: var(--spacing-xlarge);
  border-top: 1px solid var(--border-color);
}

.site-footer-copyright {
  text-align: center;
}

.site-footer-copyright p {
  margin: 0;
  padding: var(--spacing-small) 0;
  font-size: var(--font-size-small);
  color: var(--text-light);
  line-height: 1.6;
}

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

/* タブレット以下 */
@media (max-width: 1024px) {
  :root {
    --font-size-xxlarge: 28px;
    --font-size-xlarge: 22px;
  }
}

/* スマートフォン */
@media (max-width: 768px) {
  :root {
    --font-size-xxlarge: 24px;
    --font-size-xlarge: 20px;
    --font-size-large: 16px;
    --spacing-xlarge: 32px;
  }

  .container {
    padding: 0 20px;
  }

  /* ヘッダー */
  .site-header-container {
    flex-direction: row !important;
    justify-content: space-between;
    align-items: center;
  }

  .site-header-logo {
    font-size: 16px;
  }

  .site-header-logo span {
    display: inline;
  }

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

  /* ナビゲーション */
  .global-nav {
    display: block !important;
    position: fixed !important;
    top: 0 !important;
    right: -100% !important;
    width: 80% !important;
    max-width: 320px !important;
    height: 100vh !important;
    background: white !important;
    box-shadow: -2px 0 10px rgba(0, 0, 0, 0.1) !important;
    transition: right 0.3s ease !important;
    z-index: 1000 !important;
    overflow-y: auto !important;
    padding-top: 80px !important;
  }

  .global-nav.active {
    right: 0 !important;
  }

  .global-nav-list {
    display: flex !important;
    flex-direction: column !important;
    width: 100% !important;
    padding: 0 !important;
  }

  .global-nav-list > .menu-item {
    border-bottom: 1px solid var(--border-light);
    position: relative;
  }

  .global-nav-list > .menu-item > a {
    padding: 20px 24px;
    display: block;
  }

  /* サブメニュー */
  .sub-menu {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    border: none;
    background: var(--bg-light);
    display: none;
    margin: 0;
  }

  .menu-item-has-children.active .sub-menu {
    display: block;
  }

  .sub-menu li {
    border-bottom: 1px solid white;
  }

  .sub-menu a {
    padding: 16px 24px 16px 40px;
  }

  /* Nested submenu on mobile */
  .nested-sub-menu {
    position: static;
    background: #e8e8e8;
    display: none;
  }

  .sub-menu .menu-item-has-children.active .nested-sub-menu {
    display: block;
  }

  .nested-sub-menu a {
    padding: 14px 24px 14px 56px;
    font-size: 0.85rem;
  }

  .acc-btn {
    display: none !important;
  }

  /* メニューオープン時のオーバーレイ */
  body.menu-open::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 999;
  }

  .footer-content {
    grid-template-columns: 1fr;
  }

  /* セクションの余白調整（モバイル） */
  .section {
    padding: 60px 0 80px 0;
  }

  .hero {
    padding: 60px 0 80px 0;
  }

  /* セクション間の余白を追加 */
  section + section {
    margin-top: 40px;
  }
}

/* ========================================
   Utility Classes
   ======================================== */
.text-center {
  text-align: center;
}

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

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

.mt-small { margin-top: var(--spacing-small); }
.mt-medium { margin-top: var(--spacing-medium); }
.mt-large { margin-top: var(--spacing-large); }

.mb-small { margin-bottom: var(--spacing-small); }
.mb-medium { margin-bottom: var(--spacing-medium); }
.mb-large { margin-bottom: var(--spacing-large); }

.hidden {
  display: none;
}

/* ========================================
   Product Page Styles (Professional Design)
   ======================================== */

/* Product Hero Section */
.product-hero {
  background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
  color: white;
  padding: 120px 0 100px;
  position: relative;
}

.product-hero h1 {
  font-size: 52px;
  font-weight: 700;
  margin-bottom: 24px;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.product-hero p {
  font-size: 20px;
  opacity: 0.95;
  font-weight: 300;
  line-height: 1.7;
}

/* Product Content Grid */
.product-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  margin-bottom: 96px;
}

.product-image {
  width: 100%;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.product-info h2 {
  font-size: 36px;
  margin-bottom: 24px;
  color: #2c3e50;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.3;
}

.product-info h3 {
  font-size: 24px;
  margin: 48px 0 20px;
  color: #2c3e50;
  font-weight: 600;
  line-height: 1.4;
}

.product-info p {
  line-height: 2.0;
  margin-bottom: 20px;
  color: #444;
  font-size: 16px;
}

/* Feature Cards with Numbered Design */
.features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 48px;
  margin-top: 64px;
  max-width: 1100px;
  margin-left: auto;
  margin-right: auto;
}

.feature-card {
  background: #ffffff;
  padding: 48px 40px;
  border-radius: 12px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
  border: 1px solid var(--border-light);
  transition: all 0.3s ease;
  position: relative;
}

.feature-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
  border-color: var(--border-color);
}

.feature-number {
  font-size: 13px;
  font-weight: 700;
  color: #337ab7;
  margin-bottom: 20px;
  letter-spacing: 1.5px;
}

.feature-card h3 {
  font-size: 22px;
  margin-bottom: 16px;
  color: #2c3e50;
  font-weight: 700;
  line-height: 1.5;
  letter-spacing: -0.01em;
}

.feature-card p {
  color: #555;
  line-height: 2.0;
  font-size: 15px;
}

/* Quality Section */
.quality-section {
  background: var(--bg-lighter);
  padding: 96px 0;
  margin: 120px 0;
}

.quality-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 40px;
  margin-top: 48px;
}

.quality-item {
  background: white;
  padding: 40px;
  border-radius: 8px;
  border-left: 4px solid #337ab7;
}

.quality-item h4 {
  font-size: 20px;
  margin-bottom: 16px;
  color: #2c3e50;
  font-weight: 700;
  line-height: 1.4;
}

.quality-item p {
  color: #555;
  line-height: 2.0;
}

/* Specifications Table */
.specs-table {
  width: 100%;
  border-collapse: collapse;
  margin: 48px 0;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
  border-radius: 8px;
  overflow: hidden;
}

.specs-table th,
.specs-table td {
  padding: 20px 24px;
  border: 1px solid var(--border-light);
  text-align: left;
}

.specs-table th {
  background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
  color: white;
  font-weight: 600;
  width: 220px;
  font-size: 15px;
}

.specs-table td {
  background-color: white;
  color: var(--text-body);
}

.specs-table tr:hover td {
  background-color: var(--bg-light);
}

/* Comparison Section (DPF specific) */
.comparison-section {
  background: var(--bg-lighter);
  padding: 64px;
  border-radius: 12px;
  margin: 96px auto;
  max-width: 1100px;
}

.comparison-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  margin-top: 48px;
}

.comparison-item {
  padding: 32px;
  border-radius: 12px;
  background: white;
  border: 1px solid var(--border-light);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}

.comparison-item.highlight {
  border: 2px solid #337ab7;
  box-shadow: 0 4px 12px rgba(51, 122, 183, 0.08);
}

.comparison-item h4 {
  font-size: 22px;
  margin-bottom: 20px;
  color: var(--text-dark);
  font-weight: 700;
  line-height: 1.4;
}

.comparison-item ul {
  list-style: none;
  padding: 0;
}

.comparison-item li {
  padding: 10px 0;
  color: var(--text-body);
  line-height: 1.8;
}

/* Product Page Responsive Design */
@media (max-width: 768px) {
  .product-hero {
    padding: 60px 0 48px;
  }

  .product-hero h1 {
    font-size: 28px;
    line-height: 1.3;
  }

  .product-hero p {
    font-size: 16px;
    line-height: 1.6;
  }

  .product-content {
    grid-template-columns: 1fr;
    gap: 32px;
    margin-bottom: 48px;
  }

  .product-info h2 {
    font-size: 26px;
  }

  .product-info h3 {
    font-size: 20px;
    margin-top: 32px;
  }

  .product-info p {
    font-size: 15px;
  }

  .section-title {
    font-size: 26px;
    margin-bottom: 32px;
  }

  .features-grid {
    grid-template-columns: 1fr;
    gap: 24px;
    margin-top: 40px;
  }

  .feature-card {
    padding: 32px 24px;
  }

  .feature-card h3 {
    font-size: 20px;
  }

  .feature-card p {
    font-size: 14px;
  }

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

  .quality-item {
    padding: 24px;
  }

  .quality-section {
    padding: 48px 0;
    margin: 64px 0;
  }

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

  .comparison-section {
    padding: 32px 20px;
    margin: 48px 0;
  }

  .comparison-item {
    padding: 24px;
  }

  .section {
    padding: 48px 0;
  }

  /* Trust Badges - モバイル対応 */
  [style*="display: flex; justify-content: center"] {
    gap: 32px !important;
  }

  [style*="text-align: center"] > div[style*="font-size: 24px"] {
    font-size: 20px !important;
  }

  /* Specs Table */
  .specs-table {
    font-size: 14px;
  }

  .specs-table th,
  .specs-table td {
    padding: 14px 16px;
    display: block;
    width: 100% !important;
    border: none;
    border-bottom: 1px solid var(--border-light);
  }

  .specs-table th {
    background: var(--bg-light);
    color: var(--text-dark);
    font-weight: 700;
    padding-bottom: 8px;
  }

  .specs-table td {
    padding-top: 8px;
    padding-bottom: 16px;
  }

  .specs-table tr {
    display: block;
    margin-bottom: 16px;
    background: white;
    border: 1px solid var(--border-light);
    border-radius: 8px;
    overflow: hidden;
  }

  .specs-table tr:hover td {
    background-color: white;
  }
}

/* ========================================
   Hero Button Styles (Unified)
   ======================================== */
.hero-btn {
  display: inline-block;
  padding: 20px 56px;
  font-size: 16px;
  font-weight: 600;
  text-decoration: none;
  border-radius: 2px;
  transition: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
  letter-spacing: 1.5px;
  position: relative;
  overflow: hidden;
}

.hero-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 0;
  height: 100%;
  background: rgba(255, 255, 255, 0.1);
  transition: width 0.4s ease;
}

.hero-btn:hover::before {
  width: 100%;
}

.hero-btn-primary {
  background: #337ab7;
  color: white;
  box-shadow: 0 2px 16px rgba(51, 122, 183, 0.3);
}

.hero-btn-primary:hover {
  background: #2563a0;
  transform: translateY(-3px);
  box-shadow: 0 8px 32px rgba(51, 122, 183, 0.4);
}