@charset "UTF-8";

/* ==========================================================================
   Variables & Design Tokens
   ========================================================================== */
:root {
  /* Brand Colors */
  --color-primary: #245b9a;
  /* Main Navy */
  --color-primary-dark: #1a4270;
  --color-primary-light: #3a7bd5;
  --color-accent: #e3b85a;
  /* Gold */
  --color-accent-hover: #d4a745;

  /* Text Colors */
  --text-main: #1a1a1a;
  --text-sub: #666666;
  --text-light: #999999;
  --text-white: #ffffff;

  /* Background Colors */
  --bg-body: #f8f9fa;
  --bg-white: #ffffff;
  --bg-light: #f0f2f5;
  --bg-navy: #111e33;

  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 80px;

  /* Typography */
  --font-base: "Noto Sans JP", "Hiragino Kaku Gothic ProN", sans-serif;
  --font-en: "Helvetica Neue", Helvetica, Arial, sans-serif;

  /* Shadows */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 12px 24px rgba(0, 0, 0, 0.12);
  --shadow-float: 0 20px 40px rgba(0, 0, 0, 0.15);

  /* Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

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

body {
  margin: 0;
  font-family: var(--font-base);
  color: var(--text-main);
  background-color: var(--bg-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

img {
  max-width: 100%;
  height: auto;
  vertical-align: bottom;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 0;
  line-height: 1.3;
  font-weight: 700;
}

p {
  margin: 0 0 var(--space-md);
}

ul,
ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

/* ==========================================================================
   Utilities
   ========================================================================== */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

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

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

.text-primary {
  color: var(--color-primary);
}

.text-accent {
  color: var(--color-accent);
}

.flex {
  display: flex;
}

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

.justify-between {
  justify-content: space-between;
}

.justify-center {
  justify-content: center;
}

.gap-md {
  gap: var(--space-md);
}

/* ==========================================================================
   Header
   ========================================================================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  transition: all var(--transition-normal);
}

.site-header.scrolled {
  box-shadow: var(--shadow-sm);
  padding: var(--space-xs) 0;
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 80px;
  position: relative;
  z-index: 1;
}

.logo-area {
  display: flex;
  flex-direction: column;
  padding-top: var(--space-lg);
  padding-bottom: var(--space-md);
  padding-left: var(--space-md);
  flex: 0 1 auto;
  margin-right: var(--space-md);
  margin-left: 0;
  min-width: 0;
  max-width: 400px;
}

.logo-area-horizontal {
  flex-direction: row;
  align-items: center;
  gap: var(--space-md);
}

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

.logo-area .logo-link .logo-image {
  margin-top: 0;
  align-self: center;
}

.logo-text-area {
  display: flex;
  flex-direction: column;
}

.logo-image {
  width: 40px;
  height: 40px;
  object-fit: contain;
  display: block;
  flex-shrink: 0;
  margin-top: -10px;
}

.logo-text {
  font-size: 24px;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0.05em;
  white-space: nowrap;
  line-height: 1.2;
}

.logo-sub {
  font-size: 11px;
  color: var(--text-sub);
  letter-spacing: 0.1em;
  white-space: nowrap;
  line-height: 1.4;
}

/* 事業部ヘッダー用のlogo-subスタイル */
.logo-area:not(.logo-area-horizontal) .logo-sub {
  font-size: 13px;
}

/* Navigation */
.global-nav {
  display: block;
  flex: 0 1 auto;
  min-width: 0;
}

.global-nav ul {
  display: flex;
  gap: var(--space-md);
  list-style: none;
  margin: 0;
  padding: 0;
  flex-wrap: nowrap;
}

/* Mobile navigation is handled by styles starting at line 1312 */

.global-nav a {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-main);
  position: relative;
  padding: var(--space-xs) var(--space-xs);
  white-space: nowrap;
  flex-shrink: 0;
}

.global-nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: width var(--transition-normal);
}

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

.global-nav a:hover::after {
  width: 100%;
}

.nav-icon {
  margin-right: var(--space-xs);
  font-size: 0.9em;
  vertical-align: middle;
  flex-shrink: 0;
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
  position: relative;
  z-index: 1003;
  width: 44px;
  height: 44px;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
}

.mobile-menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-primary);
  transition: var(--transition-normal);
  margin: 0;
}

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

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

.mobile-menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(6px, -6px);
}

.menu-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 999;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: all var(--transition-normal);
}

.menu-overlay.active {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero {
  position: relative;
  height: 600px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  margin-top: 80px;
  /* Header height */
}

.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('/assets/img/hero-plant.png');
  background-size: cover;
  background-position: center;
  z-index: -2;
  animation: heroZoom 20s infinite alternate;
}

/* 提案1: グラデーションオーバーレイ + 微細な光の効果 */
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, 
    rgba(36, 91, 154, 0.5) 0%, 
    rgba(36, 91, 154, 0.3) 30%,
    rgba(217, 83, 79, 0.3) 70%,
    rgba(192, 57, 43, 0.5) 100%);
  z-index: -1;
  animation: overlayFadeIn 1.5s ease-out forwards;
}

@keyframes overlayFadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

.hero-particles {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image: 
    radial-gradient(6px 6px at 15% 25%, rgba(255, 255, 255, 0.6), transparent),
    radial-gradient(5px 5px at 35% 45%, rgba(255, 255, 255, 0.5), transparent),
    radial-gradient(4px 4px at 55% 65%, rgba(255, 255, 255, 0.6), transparent),
    radial-gradient(5px 5px at 75% 35%, rgba(255, 255, 255, 0.5), transparent),
    radial-gradient(6px 6px at 25% 75%, rgba(255, 255, 255, 0.6), transparent),
    radial-gradient(4px 4px at 65% 15%, rgba(255, 255, 255, 0.5), transparent),
    radial-gradient(5px 5px at 85% 55%, rgba(255, 255, 255, 0.6), transparent),
    radial-gradient(4px 4px at 45% 85%, rgba(255, 255, 255, 0.5), transparent),
    radial-gradient(6px 6px at 10% 50%, rgba(255, 255, 255, 0.4), transparent),
    radial-gradient(5px 5px at 90% 70%, rgba(255, 255, 255, 0.4), transparent);
  background-size: 200% 200%;
  animation: particleMove 20s ease-in-out infinite;
  opacity: 0.8;
}

@keyframes particleMove {
  0%, 100% { 
    background-position: 0% 0%, 100% 100%, 50% 50%, 0% 100%, 30% 80%, 70% 20%, 85% 55%, 45% 85%, 10% 50%, 90% 70%; 
  }
  50% { 
    background-position: 100% 100%, 0% 0%, 50% 50%, 100% 0%, 70% 20%, 30% 80%, 15% 45%, 55% 15%, 90% 50%, 10% 30%; 
  }
}

.hero-content {
  text-align: center;
  color: var(--text-white);
  padding: 0 var(--space-lg);
  max-width: 800px;
  animation: fadeInUp 1s ease-out forwards;
  opacity: 0;
  animation-delay: 0.3s;
  position: relative;
  z-index: 1;
}

.hero-title {
  font-family: "Montserrat", sans-serif;
  font-size: 72px;
  font-weight: 800;
  margin-bottom: var(--space-md);
  letter-spacing: 0.1em;
  line-height: 1.1;
  text-transform: uppercase;
  text-shadow: 
    0 2px 20px rgba(0, 0, 0, 0.8), 
    0 4px 30px rgba(0, 0, 0, 0.6), 
    0 6px 40px rgba(0, 0, 0, 0.4),
    0 0 60px rgba(0, 0, 0, 0.2);
  color: #fff;
  font-style: normal;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

.hero-sub {
  font-size: 20px;
  margin-bottom: var(--space-xl);
  opacity: 0.95;
  letter-spacing: 0.15em;
  font-weight: 500;
  text-shadow: 0 2px 15px rgba(0, 0, 0, 0.8), 0 3px 20px rgba(0, 0, 0, 0.6);
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.hero-lead {
  font-size: 16px;
  line-height: 2;
  opacity: 0.9;
  font-weight: 400;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.8), 0 3px 18px rgba(0, 0, 0, 0.6);
}

/* ==========================================================================
   Sections & Cards
   ========================================================================== */
.section-title {
  font-size: 32px;
  text-align: center;
  margin-bottom: var(--space-3xl);
  color: var(--color-primary);
  position: relative;
  padding-bottom: var(--space-md);
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 3px;
  background: var(--color-accent);
}

/* Card Grid */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-xl);
}

.card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
  height: 100%;
  display: flex;
  flex-direction: column;
}

.card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-float);
}

.card-image {
  height: 200px;
  background-color: var(--bg-light);
  position: relative;
  overflow: hidden;
}

.card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.card:hover .card-image img {
  transform: scale(1.05);
}

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

.card-title {
  font-size: 20px;
  margin-bottom: var(--space-sm);
  color: var(--color-primary);
}

.card-text {
  font-size: 14px;
  color: var(--text-sub);
  margin-bottom: var(--space-lg);
  flex: 1;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: 14px;
  transition: all var(--transition-normal);
  cursor: pointer;
  border: none;
}

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

.btn-primary:hover {
  background: var(--color-primary-dark);
  box-shadow: 0 4px 12px rgba(36, 91, 154, 0.3);
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--color-primary);
  color: var(--color-primary);
}

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

/* Chemical Division Card on Homepage */
.card-chemical .card-title {
  color: #D9534F;
}

.card-chemical .btn-primary {
  background: #D9534F;
  color: var(--text-white);
}

.card-chemical .btn-primary:hover {
  background: #C9302C;
  box-shadow: 0 4px 12px rgba(217, 83, 79, 0.3);
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  background: var(--bg-navy);
  color: var(--text-white);
  padding: var(--space-3xl) 0 var(--space-lg);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-2xl);
  margin-bottom: var(--space-2xl);
  align-items: start;
}

.footer-col {
  display: flex;
  flex-direction: column;
}

.footer-col h3 {
  font-size: 16px;
  margin-bottom: var(--space-lg);
  color: var(--color-accent);
}

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

.footer-links a {
  color: rgba(255, 255, 255, 0.7);
  font-size: 14px;
}

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

.footer-company-info {
  text-align: center;
  padding-top: var(--space-2xl);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  margin-bottom: var(--space-lg);
}

.footer-company-name {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: var(--space-sm);
}

.footer-company-address {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.6;
}

.copyright {
  text-align: center;
  padding-top: var(--space-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 12px;
  color: rgba(255, 255, 255, 0.5);
}

/* ==========================================================================
   Animations
   ========================================================================== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes heroZoom {
  from {
    transform: scale(1);
  }

  to {
    transform: scale(1.1);
  }
}

@keyframes shapeSlideIn {
  from {
    transform: translateX(100%);
  }

  to {
    transform: translateX(0);
  }
}

/* ==========================================================================
   Plant Division Pages
   ========================================================================== */

/* About Section */
.about-us {
  padding: var(--space-3xl) 0;
  background: var(--bg-white);
}

.about-content {
  display: block;
  /* Stack vertically */
  max-width: 900px;
  margin: 0 auto;
}

.about-text {
  text-align: center;
  margin-bottom: var(--space-3xl);
}

.about-subtitle {
  font-size: 28px;
  color: var(--color-primary);
  margin-bottom: var(--space-lg);
  line-height: 1.4;
  font-weight: 700;
  display: inline-block;
}

.about-description {
  color: var(--text-main);
  margin-bottom: var(--space-md);
  line-height: 1.8;
  font-size: 16px;
  text-align: left;
  /* Keep text readable */
}

.about-features {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  /* 4 columns */
  gap: var(--space-xl);
  border-top: 1px solid var(--border-color);
  padding-top: var(--space-2xl);
}

.about-feature-item {
  background: transparent;
  padding: 0;
  border-radius: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--space-md);
  box-shadow: none;
  border: none;
  transition: transform 0.3s ease;
}

.about-feature-item:hover {
  transform: translateY(-5px);
  box-shadow: none;
}

.about-feature-icon {
  font-size: 48px;
  color: var(--color-primary);
  background: transparent;
  width: auto;
  height: auto;
  border-radius: 0;
  display: block;
  margin-bottom: var(--space-xs);
}

.about-feature-icon i {
  color: var(--color-primary);
}

.about-feature-text {
  font-weight: 700;
  font-size: 16px;
  margin: 0;
  color: var(--text-main);
  line-height: 1.4;
}

/* Service Detail List (services.php) */
.service-detail-group {
  margin-bottom: var(--space-3xl);
  padding-bottom: var(--space-3xl);
  border-bottom: 1px solid #eee;
}

.service-detail-group:last-child {
  border-bottom: none;
}

.service-detail-title {
  font-size: 28px;
  color: var(--color-primary);
  margin-bottom: var(--space-md);
  border-left: 5px solid var(--color-accent);
  padding-left: var(--space-md);
}

.service-detail-description {
  font-size: 16px;
  margin-bottom: var(--space-xl);
  max-width: 800px;
}

.service-detail-items {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-lg);
}

.service-detail-item {
  background: var(--bg-white);
  padding: var(--space-lg);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  border: 1px solid #eee;
}

.detail-item-title {
  font-size: 18px;
  color: var(--color-primary);
  margin-bottom: var(--space-sm);
}

.detail-item-description {
  font-size: 14px;
  color: var(--text-sub);
  margin: 0;
}

/* Project List (projects.php) */
.project-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
}

.project-item {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  box-shadow: var(--shadow-md);
  position: relative;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.project-item::before {
  content: '';
  position: absolute;
  left: 0;
  top: var(--space-lg);
  bottom: var(--space-lg);
  width: 3px;
  background: var(--color-primary);
  border-radius: 0 2px 2px 0;
}

.project-item:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-float);
}

.project-item:hover::before {
  width: 5px;
  background: var(--color-primary);
}

.project-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: var(--space-lg);
  border-bottom: 1px solid #eee;
  padding-bottom: var(--space-md);
}

.project-title {
  font-size: 20px;
  color: var(--color-primary);
  font-weight: 700;
  margin: 0;
}

.project-year {
  font-family: var(--font-en);
  font-weight: 700;
  color: var(--color-accent);
  font-size: 18px;
}

.project-description {
  margin-bottom: var(--space-lg);
  color: var(--text-sub);
  line-height: 1.8;
  font-size: 15px;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-top: var(--space-md);
}

.project-tags li {
  background: var(--bg-light);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: 12px;
  color: var(--text-sub);
  font-weight: 500;
  transition: background var(--transition-fast), color var(--transition-fast);
}

.project-item:hover .project-tags li {
  background: rgba(36, 91, 154, 0.1);
  color: var(--color-primary);
}

/* Software Grid (plant.php) */
.software-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-lg);
}

.software-item {
  background: var(--bg-white);
  padding: var(--space-lg);
  border-radius: var(--radius-md);
  text-align: center;
  box-shadow: var(--shadow-sm);
}

.software-title {
  color: var(--color-primary);
  margin-bottom: var(--space-md);
  font-size: 18px;
}

.software-list li {
  margin-bottom: var(--space-xs);
  font-size: 14px;
  color: var(--text-sub);
}

/* Capabilities Cards */
.capabilities-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-xl);
  max-width: 1200px;
  margin: 0 auto;
}

.capability-card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
  border: 1px solid #eee;
}

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

.capability-header {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
  padding-bottom: var(--space-lg);
  border-bottom: 2px solid var(--bg-light);
}

.capability-icon {
  width: 56px;
  height: 56px;
  background: var(--color-primary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: #fff;
  font-size: 28px;
  box-shadow: 0 4px 12px rgba(36, 91, 154, 0.3);
}

.capability-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-primary);
  margin: 0;
  line-height: 1.4;
}

.capability-software {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.software-badge {
  display: inline-block;
  padding: var(--space-xs) var(--space-md);
  background: var(--bg-light);
  color: var(--text-main);
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  border: 1px solid #e0e0e0;
  transition: all var(--transition-normal);
}

.software-badge:hover {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
  transform: translateY(-2px);
  box-shadow: 0 2px 8px rgba(36, 91, 154, 0.2);
}

@media (max-width: 768px) {
  .about-features {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
  }

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

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

  .capability-header {
    flex-direction: column;
    text-align: center;
    gap: var(--space-sm);
  }

  .capability-icon {
    width: 48px;
    height: 48px;
    font-size: 24px;
  }

  .capability-title {
    font-size: 18px;
  }

  .software-badge {
    font-size: 13px;
    padding: var(--space-xs) var(--space-sm);
  }
}

/* Floating Home Button */
.floating-home-btn {
  position: fixed;
  bottom: 30px;
  right: 30px;
  background: var(--color-primary);
  color: #fff;
  width: 60px;
  height: 60px;
  border-radius: 50%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
  z-index: 1000;
  transition: transform 0.3s ease, background 0.3s ease;
  font-size: 10px;
  font-weight: 700;
  border: 2px solid rgba(255, 255, 255, 0.2);
}

.floating-home-btn:hover {
  transform: translateY(-5px);
  background: var(--color-accent);
  color: var(--color-primary);
}


/* ==========================================================================
   Chemical Division Pages (Red Theme)
   ========================================================================== */
:root {
  --color-chemical-primary: #D9534F;
  /* Soft Red Accent */
  --color-chemical-base: #546E7A;
  /* Blue Grey Base */
  --color-chemical-accent: #E57373;
  /* Lighter Red */
  --color-chemical-bg: #F5F7FA;
  /* Cool Light Gray Background */
}

/* Theme Overrides */
.theme-chemical .section-title {
  color: var(--color-chemical-base);
}

.theme-chemical .section-title::after {
  background: var(--color-chemical-primary);
}

.theme-chemical .hero-overlay {
  background: linear-gradient(135deg, rgba(0, 0, 0, 0.3) 0%, rgba(0, 0, 0, 0.5) 100%);
  /* Subtle dark overlay for text readability */
}

/* Improve Hero Text Visibility */
.theme-chemical .hero-title {
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.8), 0 4px 30px rgba(0, 0, 0, 0.6);
  color: #fff;
  font-weight: 700;
}

.theme-chemical .hero-sub {
  text-shadow: 0 2px 15px rgba(0, 0, 0, 0.8), 0 3px 20px rgba(0, 0, 0, 0.6);
  color: #fff;
}

.theme-chemical .hero-lead {
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.8), 0 3px 18px rgba(0, 0, 0, 0.6);
  color: #fff;
}

/* Improve Hero Text Visibility for Plant Division */
.hero:not(.theme-chemical) .hero-overlay {
  background: linear-gradient(135deg, rgba(0, 0, 0, 0.3) 0%, rgba(0, 0, 0, 0.5) 100%);
  /* Subtle dark overlay for text readability */
}

.hero:not(.theme-chemical) .hero-title {
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.8), 0 4px 30px rgba(0, 0, 0, 0.6);
  color: #fff;
  font-weight: 700;
}

.hero:not(.theme-chemical) .hero-sub {
  text-shadow: 0 2px 15px rgba(0, 0, 0, 0.8), 0 3px 20px rgba(0, 0, 0, 0.6);
  color: #fff;
}

.hero:not(.theme-chemical) .hero-lead {
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.8), 0 3px 18px rgba(0, 0, 0, 0.6);
  color: #fff;
}

.theme-chemical .about-subtitle {
  color: var(--color-chemical-base);
  border-color: var(--color-chemical-primary);
}

/* Updated Icon Style: No background, Red icon line */
.theme-chemical .about-feature-icon {
  background: transparent;
  color: var(--color-chemical-primary);
  border: none;
  /* User asked to remove red square, implying just the icon */
  padding: 0;
  width: auto;
  height: auto;
}

.theme-chemical .about-feature-icon i {
  color: var(--color-chemical-primary);
  font-size: 48px;
  /* Ensure size is good */
}

.theme-chemical .about-feature-text {
  color: var(--color-chemical-base);
}

.theme-chemical .about-feature-item:hover {
  border-color: var(--color-chemical-primary);
}

.theme-chemical .card-title {
  color: var(--color-chemical-base);
}

.theme-chemical .card-title i {
  color: var(--color-chemical-primary) !important;
}

.theme-chemical .btn-outline {
  color: var(--color-chemical-primary);
  border-color: var(--color-chemical-primary);
}

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

.theme-chemical .page-header {
  background: linear-gradient(135deg, #455A64 0%, #607D8B 100%);
  /* Blue Grey Gradient */
}

.theme-chemical .floating-home-btn {
  background: var(--color-chemical-base);
}

.theme-chemical .floating-home-btn:hover {
  background: var(--color-chemical-primary);
}

.theme-chemical .news-badge {
  background: #fff;
  color: var(--color-chemical-primary);
}

/* Chemical Commodities Table */
.chemical-table {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
  box-shadow: var(--shadow-sm);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.chemical-table th,
.chemical-table td {
  padding: var(--space-md) var(--space-lg);
  border-bottom: 1px solid #eee;
  text-align: left;
}

.chemical-table th {
  background: var(--color-chemical-primary);
  color: #fff;
  font-weight: 700;
  white-space: nowrap;
}

.chemical-table tr:last-child td {
  border-bottom: none;
}

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

.chemical-table a {
  color: var(--color-chemical-primary);
  text-decoration: none;
  font-weight: 700;
}

.chemical-table a:hover {
  text-decoration: underline;
}

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

  .about-features {
    grid-template-columns: 1fr;
  }

  .project-header {
    flex-direction: column;
    gap: var(--space-xs);
  }
}

/* タブレット版（769px以上1023px以下）はメニューボタン式 */
@media (min-width: 769px) and (max-width: 1023px) {
  .header-inner {
    height: auto !important;
    min-height: 90px !important;
    padding: var(--space-sm) 0 !important;
    align-items: flex-start !important;
  }

  .mobile-menu-toggle {
    display: flex !important;
    position: relative;
    z-index: 1003;
    pointer-events: auto;
  }

  /* PC版のスタイルを上書き */
  .global-nav {
    display: none !important;
    position: fixed !important;
    top: 90px !important;
    left: 0 !important;
    right: 0 !important;
    width: 100% !important;
    background: var(--bg-white) !important;
    padding: var(--space-lg) !important;
    box-shadow: var(--shadow-lg) !important;
    transform: translateY(-100%) !important;
    opacity: 0 !important;
    visibility: hidden !important;
    z-index: 1002 !important;
    max-height: calc(100vh - 90px) !important;
    overflow-y: auto !important;
    transition: all 0.3s ease-out !important;
  }

  .global-nav.active {
    display: block !important;
    transform: translateY(0) !important;
    opacity: 1 !important;
    visibility: visible !important;
  }

  .global-nav ul {
    flex-direction: column !important;
    gap: var(--space-md) !important;
    width: 100% !important;
  }

  .global-nav li {
    width: 100% !important;
  }

  .global-nav a {
    display: block !important;
    width: 100% !important;
    padding: var(--space-md) 0 !important;
    font-size: 16px !important;
  }

  .logo-area {
    max-width: calc(100% - 60px) !important;
    margin-left: 0 !important;
    flex: 1 1 auto !important;
    overflow: hidden !important;
    min-width: 0 !important;
    padding-top: var(--space-lg) !important;
    padding-bottom: var(--space-md) !important;
    padding-left: var(--space-md) !important;
    order: 1 !important;
  }

  .header-inner {
    position: relative !important;
    justify-content: space-between !important;
    align-items: flex-start !important;
  }

  .mobile-menu-toggle {
    flex-shrink: 0;
    order: 2;
    align-self: center !important;
    margin-top: 0 !important;
  }
}

/* iPad版のスタイル（1024px以上1366px以下） */
@media (min-width: 1024px) and (max-width: 1366px) {
  .header-inner {
    height: 90px;
    padding: var(--space-md) 0;
    min-height: 90px;
  }

  .logo-area {
    padding-top: var(--space-md);
    padding-bottom: var(--space-md);
    padding-left: var(--space-md);
    flex-shrink: 0;
  }

  .logo-text {
    font-size: 20px;
    line-height: 1.3;
  }

  .logo-sub {
    font-size: 10px;
    line-height: 1.5;
    margin-top: var(--space-xs);
  }

  .global-nav {
    flex-shrink: 1;
    min-width: 0;
  }

  .global-nav ul {
    gap: var(--space-sm);
    flex-wrap: nowrap;
    justify-content: flex-end;
  }

  .global-nav a {
    font-size: 13px;
    padding: var(--space-xs) var(--space-xs);
    white-space: nowrap;
    line-height: 1.4;
  }

  .nav-icon {
    font-size: 0.95em;
    margin-right: 3px;
  }

  .site-header {
    padding: var(--space-sm) 0;
  }

  /* ロゴエリアの横並びレイアウト対応 */
  .logo-area-horizontal {
    flex-direction: row;
    align-items: center;
    gap: var(--space-sm);
  }

  .logo-area-horizontal .logo-image {
    flex-shrink: 0;
  }

  .logo-area-horizontal .logo-text-area {
    flex-shrink: 1;
    min-width: 0;
  }
}

@media (max-width: 768px) {
  .header-inner {
    height: auto !important;
    min-height: 70px !important;
    align-items: flex-start !important;
  }

  .mobile-menu-toggle {
    display: flex !important;
    position: relative;
    z-index: 1003;
    pointer-events: auto;
  }

  /* PC版のスタイルを上書き */
  .global-nav {
    display: none !important;
    position: fixed !important;
    top: 70px !important;
    left: 0 !important;
    right: 0 !important;
    width: 100% !important;
    background: var(--bg-white) !important;
    padding: var(--space-lg) !important;
    box-shadow: var(--shadow-lg) !important;
    transform: translateY(-100%) !important;
    opacity: 0 !important;
    visibility: hidden !important;
    z-index: 1002 !important;
    max-height: calc(100vh - 70px) !important;
    overflow-y: auto !important;
    transition: all 0.3s ease-out !important;
  }

  .global-nav.active {
    display: block !important;
    transform: translateY(0) !important;
    opacity: 1 !important;
    visibility: visible !important;
  }

  .global-nav ul {
    flex-direction: column !important;
    gap: var(--space-md) !important;
    width: 100% !important;
  }

  .global-nav li {
    width: 100% !important;
  }

  .global-nav a {
    display: block !important;
    width: 100% !important;
    padding: var(--space-md) 0 !important;
  }

  .logo-area {
    max-width: calc(100% - 60px) !important;
    margin-left: 0 !important;
    flex: 1 1 auto !important;
    overflow: hidden !important;
    min-width: 0 !important;
    padding-top: var(--space-md) !important;
    padding-bottom: var(--space-sm) !important;
    padding-left: var(--space-sm) !important;
    order: 1 !important;
  }

  .header-inner {
    position: relative !important;
    justify-content: space-between !important;
    align-items: flex-start !important;
  }

  .mobile-menu-toggle {
    flex-shrink: 0;
    order: 2;
    align-self: center;
    margin-top: 0;
  }

  .hero {
    height: 400px;
    margin-top: 70px;
  }

  .hero-title {
    font-size: 32px;
    letter-spacing: 0.06em;
    line-height: 1.2;
  }

  .hero-sub {
    font-size: 13px;
    letter-spacing: 0.1em;
  }

  .hero-lead {
    font-size: 14px;
    line-height: 1.8;
  }

  .hero-content {
    padding: 0 var(--space-md);
  }

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

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

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

  .section-title {
    font-size: 24px;
    margin-bottom: var(--space-xl);
  }

  .lead-text {
    font-size: 14px;
  }

  .logo-area {
    margin-left: 0 !important;
    padding-top: var(--space-md) !important;
    padding-bottom: var(--space-sm) !important;
    padding-left: var(--space-sm) !important;
  }

  .logo-area-horizontal {
    flex-direction: row;
    align-items: center;
    gap: var(--space-sm);
  }

  .logo-image {
    width: 32px;
    height: 32px;
  }

  .logo-text-area {
    width: 100%;
    min-width: 0;
  }

  .logo-text {
    font-size: 18px;
    line-height: 1.2;
  }

  .logo-sub {
    font-size: 9px;
    line-height: 1.4;
  }

  .header-inner {
    padding: 0 var(--space-md);
  }

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

  .footer-col {
    margin-bottom: var(--space-lg);
  }

  .footer-company-info {
    padding-top: var(--space-xl);
  }

  .footer-company-address {
    font-size: 12px;
    line-height: 1.6;
  }

  .news-list-home {
    padding: var(--space-md);
  }

  .news-list-home li {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-xs);
    padding: var(--space-sm) 0;
  }

  .news-list-home time {
    font-size: 12px;
  }

  .news-list-home a {
    font-size: 14px;
  }

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

  .capability-card {
    padding: var(--space-lg);
  }

  .capability-header {
    flex-direction: column;
    text-align: center;
  }

  .software-badge {
    font-size: 12px;
    padding: var(--space-xs) var(--space-sm);
  }

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

  .page-title {
    font-size: 24px;
  }

  .page-subtitle {
    font-size: 12px;
  }

  .chemical-table {
    font-size: 13px;
  }

  .chemical-table th,
  .chemical-table td {
    padding: var(--space-sm) var(--space-md);
  }

  .partner-list {
    grid-template-columns: 1fr;
  }

  .partner-list a {
    padding: var(--space-sm) var(--space-md);
    font-size: 14px;
  }

  .about-features {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }

  .about-feature-item {
    padding: var(--space-md);
  }

  .about-feature-icon {
    width: 48px;
    height: 48px;
  }

  .about-feature-icon i {
    font-size: 24px;
  }

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

  .card-title {
    font-size: 18px;
  }

  .card-text {
    font-size: 14px;
  }

  .btn {
    padding: var(--space-sm) var(--space-lg);
    font-size: 14px;
  }

  .floating-home-btn {
    width: 50px;
    height: 50px;
    bottom: 20px;
    right: 20px;
    font-size: 9px;
  }

  .global-nav a {
    padding: var(--space-sm) 0;
    font-size: 16px;
    min-height: 44px;
    display: flex;
    align-items: center;
  }

  .btn {
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .card-title {
    min-height: 44px;
    display: flex;
    align-items: center;
  }

  .software-badge {
    min-height: 32px;
    display: inline-flex;
    align-items: center;
  }
}

/* ==========================================================================
   Subpages
   ========================================================================== */
.page-header {
  background: var(--color-primary);
  color: var(--text-white);
  padding: 120px 0 60px;
  /* Account for fixed header */
  text-align: center;
  margin-bottom: var(--space-3xl);
  background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 100%);
}

.page-header-compact {
  padding: 80px 0 30px;
}

.page-title {
  font-size: 36px;
  margin-bottom: var(--space-xs);
  letter-spacing: 0.1em;
}

.page-subtitle {
  font-size: 14px;
  opacity: 0.8;
  letter-spacing: 0.2em;
  font-family: var(--font-en);
}

.page-content {
  padding-bottom: var(--space-3xl);
}

.content-section {
  margin-bottom: var(--space-3xl);
}

/* Company Info Table */
.company-info {
  display: grid;
  grid-template-columns: 160px 1fr;
  border-top: 1px solid #eee;
  font-size: 15px;
}

.company-info dt {
  padding: var(--space-md);
  background: var(--bg-light);
  border-bottom: 1px solid #eee;
  font-weight: 700;
  color: var(--color-primary);
}

.company-info dd {
  margin: 0;
  padding: var(--space-md);
  border-bottom: 1px solid #eee;
}

/* History List */
.history-list {
  border-left: 2px solid #eee;
  padding-left: var(--space-lg);
  margin-left: var(--space-md);
}

.history-list li {
  position: relative;
  margin-bottom: var(--space-lg);
}

.history-list li::before {
  content: '';
  position: absolute;
  top: 6px;
  left: calc(-1 * var(--space-lg) - 5px);
  width: 10px;
  height: 10px;
  background: var(--color-primary);
  border-radius: 50%;
  box-shadow: 0 0 0 4px #fff;
}

.history-year {
  display: inline-block;
  font-weight: 700;
  width: 120px;
  color: var(--color-primary);
}

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

  .company-info dt {
    background: transparent;
    padding-bottom: 0;
    border-bottom: none;
  }

  .company-info dd {
    padding-top: var(--space-xs);
  }

  .history-year {
    display: block;
    margin-bottom: var(--space-xs);
  }
}

/* ==========================================================================
   Contact Page
   ========================================================================== */
.contact-section {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: var(--space-3xl);
  margin-top: var(--space-3xl);
}

.contact-section-form-only {
  grid-template-columns: 1fr;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.contact-info {
  background: var(--bg-white);
  padding: var(--space-2xl);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.contact-info .section-title {
  margin-bottom: var(--space-xl);
}

.contact-details {
  margin: 0;
  padding: 0;
}

.contact-details dt {
  font-weight: 700;
  color: var(--color-primary);
  margin-top: var(--space-lg);
  margin-bottom: var(--space-xs);
  font-size: 14px;
}

.contact-details dt:first-child {
  margin-top: 0;
}

.contact-details dd {
  margin: 0 0 var(--space-md) 0;
  color: var(--text-main);
  font-size: 15px;
  line-height: 1.6;
}

.contact-form {
  background: var(--bg-white);
  padding: var(--space-2xl);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.contact-form .section-title {
  margin-bottom: var(--space-xl);
}

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

.form-group {
  margin-bottom: var(--space-xl);
}

.form-label {
  display: block;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: var(--space-sm);
  font-size: 14px;
}

.required {
  color: #D9534F;
  font-size: 12px;
  margin-left: var(--space-xs);
}

.form-input,
.form-textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid #ddd;
  border-radius: var(--radius-md);
  font-size: 15px;
  font-family: var(--font-base);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  background: var(--bg-white);
}

.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(36, 91, 154, 0.1);
}

.form-textarea {
  resize: vertical;
  min-height: 120px;
}

.form-submit {
  background: var(--color-primary);
  color: var(--text-white);
  padding: 14px 32px;
  border: none;
  border-radius: var(--radius-full);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-normal);
  font-family: var(--font-base);
}

.form-submit:hover {
  background: var(--color-primary-dark);
  box-shadow: 0 4px 12px rgba(36, 91, 154, 0.3);
  transform: translateY(-2px);
}

.lead-text {
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-sub);
  text-align: center;
  margin-bottom: var(--space-2xl);
}

@media (max-width: 768px) {
  .contact-section {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
  }
}

/* News List */
.news-section {
  max-width: 900px;
  margin: 0 auto;
}

.news-section-home {
  background-color: var(--bg-light);
}

.news-wrapper {
  max-width: 800px;
  margin: 0 auto;
}

.news-list-home {
  background: #fff;
  padding: var(--space-lg);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  list-style: none;
  margin: 0;
}

.news-list-home li {
  border-bottom: 1px solid #eee;
  padding: var(--space-md) 0;
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.news-list-home li:last-child {
  border-bottom: none;
}

.news-list-home time {
  font-family: var(--font-en);
  color: var(--text-sub);
  font-size: 14px;
  white-space: nowrap;
  flex-shrink: 0;
}

.news-list-home a {
  font-weight: 500;
  color: var(--text-main);
  text-decoration: none;
  transition: color var(--transition-normal);
  flex: 1;
  min-width: 0;
}

.news-list-home a:hover {
  color: var(--color-primary);
}

.news-button-wrapper {
  margin-top: var(--space-xl);
}

.news-list {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: var(--space-lg);
  list-style: none;
}

.news-list li {
  border-bottom: 1px solid #eee;
  padding: var(--space-lg) 0;
  display: flex;
  align-items: baseline;
  gap: var(--space-md);
}

.news-list li:last-child {
  border-bottom: none;
}

.news-date {
  font-family: var(--font-en);
  color: var(--text-sub);
  font-size: 14px;
  white-space: nowrap;
  min-width: 120px;
}

.news-link {
  flex: 1;
  color: var(--text-main);
  font-weight: 500;
  text-decoration: none;
  transition: color var(--transition-fast);
}

.news-link:hover {
  color: var(--color-primary);
}

.news-badge {
  background: var(--color-accent);
  color: #000;
  font-size: 10px;
  padding: 2px 6px;
  border-radius: 2px;
  font-weight: 700;
}

/* Dark background news list (for plant.php) */
.news-list-dark {
  background: transparent;
  box-shadow: none;
  padding: 0;
}

.news-list-dark li {
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.news-list-dark .news-date {
  color: rgba(255, 255, 255, 0.7);
}

.news-list-dark .news-link {
  color: #fff;
}

.news-list-dark .news-link:hover {
  color: var(--color-accent);
}

.theme-chemical .news-list-dark .news-link:hover {
  color: #fff;
  opacity: 0.8;
}

/* Partners Page */
.partners-section {
  max-width: 1000px;
  margin: 0 auto;
}

.partner-category {
  margin-bottom: var(--space-3xl);
}

.partner-category:last-child {
  margin-bottom: 0;
}

.partner-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-md);
}

.partner-list li {
  margin: 0;
}

.partner-list a {
  display: block;
  padding: var(--space-md) var(--space-lg);
  background: var(--bg-white);
  border: 1px solid #eee;
  border-radius: var(--radius-md);
  color: var(--text-main);
  text-decoration: none;
  transition: all var(--transition-normal);
  font-weight: 500;
}

.partner-list a:hover {
  border-color: var(--color-chemical-primary);
  color: var(--color-chemical-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.theme-chemical .partner-list a:hover {
  border-color: var(--color-chemical-primary);
  color: var(--color-chemical-primary);
}