/* ========================================
   CSS Variables
======================================== */
:root {
  --color-primary: #1a3d32;
  --color-primary-dark: #0f2a22;
  --color-primary-light: #2a5545;
  --color-accent: #c9a962;
  --color-accent-light: #d4ba7a;
  --color-white: #ffffff;
  --color-off-white: #f8f7f4;
  --color-gray-100: #f5f5f5;
  --color-gray-200: #e8e8e8;
  --color-gray-300: #d1d1d1;
  --color-gray-600: #666666;
  --color-gray-800: #333333;
  --color-text: #2c2c2c;
  --color-text-light: #555555;
  
  --font-sans: 'Noto Sans JP', sans-serif;
  --font-serif: 'Noto Serif JP', serif;
  
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  --spacing-3xl: 6rem;
  
  --transition: 0.3s ease;
  --border-radius: 4px;
  --border-radius-lg: 8px;
}

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

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-text);
  background-color: var(--color-white);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

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

ul {
  list-style: none;
}

/* セクション共通 */
section {
  width: 100%;
  overflow-x: hidden;
}

/* ========================================
   Utility Classes
======================================== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
  width: 100%;
  box-sizing: border-box;
}

.btn {
  display: inline-block;
  padding: 1rem 2.25rem;
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: var(--transition);
  text-align: center;
  border: none;
  letter-spacing: 0.02em;
}

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

.btn-primary:hover {
  background-color: var(--color-accent-light);
  transform: translateY(-2px);
}

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

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

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

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

.btn-full {
  width: 100%;
}

/* ========================================
   Header
======================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  width: 100%;
  z-index: 1000;
  background-color: rgba(26, 61, 50, 0.95);
  backdrop-filter: blur(10px);
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
}

.logo-text {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--color-white);
  letter-spacing: 0.05em;
}

.logo-plus {
  color: var(--color-accent);
}

.nav-list {
  display: flex;
  gap: var(--spacing-lg);
}

.nav-list a {
  color: var(--color-white);
  font-size: 0.875rem;
  font-weight: 400;
  opacity: 0.9;
}

.nav-list a:hover {
  opacity: 1;
  color: var(--color-accent);
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 5px;
}

.menu-toggle span {
  width: 24px;
  height: 2px;
  background-color: var(--color-white);
  transition: var(--transition);
}

/* ========================================
   Hero Section
======================================== */
.hero {
  position: relative;
  min-height: 100vh;
  background-color: var(--color-primary);
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-top: 80px;
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  overflow: hidden;
}

.hero-image-placeholder {
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 50%, var(--color-primary-light) 100%);
  opacity: 0.5;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
  padding: var(--spacing-3xl) var(--spacing-lg);
  color: var(--color-white);
  box-sizing: border-box;
}

.hero-title {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 5vw, 3.25rem);
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: var(--spacing-lg);
  letter-spacing: 0.03em;
}

.hero-title .highlight {
  color: var(--color-accent);
  font-weight: 700;
}

.hero-text {
  font-size: 1.0625rem;
  font-weight: 400;
  line-height: 2.2;
  opacity: 0.95;
  margin-bottom: var(--spacing-xl);
  letter-spacing: 0.02em;
}

.hero-buttons {
  display: flex;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

.hero-features {
  position: relative;
  z-index: 1;
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
  padding: var(--spacing-2xl) var(--spacing-lg);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-lg);
  box-sizing: border-box;
}

.hero-feature {
  background-color: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  padding: var(--spacing-lg);
  border-radius: var(--border-radius-lg);
  color: var(--color-white);
}

.hero-feature h3 {
  font-family: var(--font-serif);
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--color-accent);
}

.hero-feature p {
  font-size: 0.9375rem;
  font-weight: 300;
  line-height: 1.9;
  opacity: 0.9;
}

/* ========================================
   Section Titles
======================================== */
.section-title {
  font-family: var(--font-serif);
  font-size: clamp(1.625rem, 3.5vw, 2.25rem);
  font-weight: 700;
  text-align: center;
  margin-bottom: var(--spacing-md);
  line-height: 1.5;
  color: var(--color-text);
  letter-spacing: 0.02em;
}

.section-title-light {
  color: var(--color-white);
}

.section-subtitle {
  text-align: center;
  font-size: 1rem;
  font-weight: 400;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: var(--spacing-2xl);
  line-height: 1.9;
}

.section-description {
  text-align: center;
  font-size: 1rem;
  font-weight: 400;
  color: var(--color-text-light);
  margin-bottom: var(--spacing-2xl);
  line-height: 1.9;
}

.section-description small {
  font-size: 0.8125rem;
  font-weight: 400;
  color: var(--color-gray-600);
}

/* ========================================
   Concerns Section
======================================== */
.concerns {
  padding: var(--spacing-3xl) 0;
  background-color: var(--color-off-white);
}

.concerns-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

.concern-item {
  background-color: var(--color-white);
  padding: var(--spacing-lg);
  border-radius: var(--border-radius-lg);
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
}

.concern-icon {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  background-color: var(--color-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
}

.concern-item p {
  font-size: 1rem;
  font-weight: 500;
  line-height: 1.8;
  color: var(--color-text);
}

.concerns-footer {
  text-align: center;
  font-size: 1rem;
  color: var(--color-primary);
  font-weight: 600;
}

/* ========================================
   Value Add Section
======================================== */
.value-add {
  padding: var(--spacing-3xl) 0;
  background-color: var(--color-primary);
}

.value-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-2xl);
}

.value-item {
  background-color: rgba(255, 255, 255, 0.08);
  padding: var(--spacing-lg);
  border-radius: var(--border-radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.value-item h3 {
  font-family: var(--font-serif);
  font-size: 1.1875rem;
  font-weight: 600;
  color: var(--color-accent);
  margin-bottom: var(--spacing-sm);
  letter-spacing: 0.01em;
}

.value-item p {
  font-size: 0.9375rem;
  font-weight: 300;
  line-height: 1.9;
  color: rgba(255, 255, 255, 0.9);
}

.team-highlight {
  display: flex;
  align-items: center;
  gap: var(--spacing-xl);
  background-color: rgba(255, 255, 255, 0.05);
  padding: var(--spacing-lg);
  border-radius: var(--border-radius-lg);
}

.team-image-placeholder {
  width: 200px;
  height: 150px;
  background: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0.05) 100%);
  border-radius: var(--border-radius-lg);
  flex-shrink: 0;
}

.team-info {
  color: var(--color-white);
}

.team-label {
  font-size: 0.8125rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-accent);
  display: block;
  margin-bottom: var(--spacing-xs);
}

.team-info > p {
  font-size: 1.0625rem;
  font-weight: 400;
  margin-bottom: var(--spacing-sm);
}

.team-stat {
  display: flex;
  align-items: baseline;
  gap: var(--spacing-xs);
}

.stat-number {
  font-size: 3rem;
  font-weight: 700;
  color: var(--color-accent);
}

.stat-plus {
  font-size: 1.75rem;
}

.stat-label {
  font-size: 0.9375rem;
  font-weight: 400;
  color: rgba(255, 255, 255, 0.75);
}

/* ========================================
   Plans Section
======================================== */
.plans {
  padding: var(--spacing-3xl) 0;
  background-color: var(--color-white);
}

.plans-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-lg);
}

.plan-card {
  background-color: var(--color-off-white);
  padding: var(--spacing-xl);
  border-radius: var(--border-radius-lg);
  text-align: center;
  border: 1px solid var(--color-gray-200);
  transition: var(--transition);
}

.plan-card:hover {
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
  transform: translateY(-4px);
}

.plan-icon {
  width: 72px;
  height: 72px;
  background-color: var(--color-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--spacing-md);
  color: var(--color-accent);
}

.plan-card h3 {
  font-family: var(--font-serif);
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--spacing-md);
}

.plan-description {
  font-size: 0.9375rem;
  font-weight: 400;
  color: var(--color-text-light);
  margin-bottom: var(--spacing-lg);
  line-height: 1.7;
}

.plan-features {
  margin-bottom: var(--spacing-lg);
}

.plan-features li {
  font-size: 0.9375rem;
  font-weight: 500;
  padding: var(--spacing-xs) 0;
  border-bottom: 1px solid var(--color-gray-200);
  color: var(--color-text);
}

.plan-features li:last-child {
  border-bottom: none;
}

/* ========================================
   Projects Section
======================================== */
.projects {
  padding: var(--spacing-3xl) 0;
  background-color: var(--color-primary);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

.project-card {
  background-color: var(--color-white);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  transition: var(--transition);
}

.project-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.2);
}

.project-image-placeholder {
  width: 100%;
  height: 200px;
  background: linear-gradient(135deg, var(--color-gray-200) 0%, var(--color-gray-100) 100%);
}

.project-info {
  padding: var(--spacing-md);
}

.project-location {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-accent);
  background-color: rgba(201, 169, 98, 0.1);
  padding: 0.25rem 0.5rem;
  border-radius: var(--border-radius);
  display: inline-block;
  margin-bottom: var(--spacing-xs);
}

.project-info h3 {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--spacing-xs);
}

.project-info p {
  font-size: 0.875rem;
  font-weight: 400;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: var(--spacing-sm);
}

.project-area {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-gray-600);
}

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

/* ========================================
   Partners Section
======================================== */
.partners {
  padding: var(--spacing-3xl) 0;
  background-color: var(--color-off-white);
}

.partners-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-xl);
}

.partner-card {
  background-color: var(--color-white);
  padding: var(--spacing-md);
  border-radius: var(--border-radius-lg);
  text-align: center;
  transition: var(--transition);
}

.partner-card:hover {
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.partner-image-placeholder {
  width: 100px;
  height: 100px;
  background: linear-gradient(135deg, var(--color-gray-200) 0%, var(--color-gray-100) 100%);
  border-radius: 50%;
  margin: 0 auto var(--spacing-sm);
}

.partner-card h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 0.25rem;
}

.partner-role {
  font-size: 0.8125rem;
  font-weight: 400;
  color: var(--color-gray-600);
  display: block;
  margin-bottom: var(--spacing-xs);
}

.partner-tagline {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-primary);
  font-style: italic;
  margin-bottom: var(--spacing-xs);
}

.partner-specialty {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-accent);
  background-color: rgba(201, 169, 98, 0.1);
  padding: 0.25rem 0.5rem;
  border-radius: var(--border-radius);
  display: inline-block;
}

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

/* ========================================
   Contact Section
======================================== */
.contact {
  padding: var(--spacing-3xl) 0;
  background-color: var(--color-primary);
  overflow-x: hidden;
}

.contact-wrapper {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: var(--spacing-2xl);
  align-items: start;
  width: 100%;
  box-sizing: border-box;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
  min-width: 0;
}

.contact-info-item {
  background-color: rgba(255, 255, 255, 0.08);
  padding: var(--spacing-md);
  border-radius: var(--border-radius-lg);
  word-break: break-word;
}

.contact-info-item h3 {
  font-size: 0.875rem;
  font-weight: 400;
  color: rgba(255, 255, 255, 0.75);
  margin-bottom: var(--spacing-xs);
}

.contact-main {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-white);
  margin-bottom: 0.25rem;
  word-break: break-all;
}

.contact-info-item span {
  font-size: 0.8125rem;
  font-weight: 400;
  color: rgba(255, 255, 255, 0.6);
}

.contact-form {
  background-color: var(--color-white);
  padding: var(--spacing-xl);
  border-radius: var(--border-radius-lg);
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-md);
  min-width: 0;
  width: 100%;
  box-sizing: border-box;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-group-full {
  grid-column: 1 / -1;
}

.form-group label {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-text);
}

.required {
  color: #c54b4b;
}

.char-limit {
  font-weight: 400;
  color: var(--color-gray-600);
  font-size: 0.8125rem;
}

.form-group input,
.form-group select,
.form-group textarea {
  padding: 0.875rem 1rem;
  font-size: 1rem;
  font-weight: 400;
  font-family: var(--font-sans);
  border: 1px solid var(--color-gray-300);
  border-radius: var(--border-radius);
  transition: var(--transition);
  background-color: var(--color-white);
  width: 100%;
  box-sizing: border-box;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(26, 61, 50, 0.1);
}

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

.char-count {
  font-size: 0.8125rem;
  font-weight: 400;
  color: var(--color-gray-600);
  text-align: right;
}

.contact-form .btn {
  grid-column: 1 / -1;
  margin-top: var(--spacing-sm);
}

/* ========================================
   Footer
======================================== */
.footer {
  background-color: var(--color-primary-dark);
  color: var(--color-white);
  padding: var(--spacing-2xl) 0 var(--spacing-lg);
  overflow-x: hidden;
}

.footer-main {
  display: grid;
  grid-template-columns: 1.5fr 2fr;
  gap: var(--spacing-2xl);
  margin-bottom: var(--spacing-xl);
  padding-bottom: var(--spacing-xl);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  width: 100%;
  box-sizing: border-box;
}

.footer-brand {
  min-width: 0;
}

.footer-brand .logo {
  margin-bottom: var(--spacing-md);
}

.footer-brand p {
  font-size: 0.875rem;
  line-height: 1.8;
  opacity: 0.7;
  word-break: break-word;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-xl);
  min-width: 0;
}

.footer-column h4 {
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: var(--spacing-md);
  color: var(--color-accent);
}

.footer-column ul li {
  margin-bottom: var(--spacing-xs);
  word-break: break-word;
}

.footer-column ul li a {
  font-size: 0.875rem;
  opacity: 0.7;
}

.footer-column ul li a:hover {
  opacity: 1;
}

.footer-contact li {
  font-size: 0.875rem;
  opacity: 0.7;
  margin-bottom: var(--spacing-xs);
  word-break: break-word;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

.footer-bottom p {
  font-size: 0.8125rem;
  opacity: 0.6;
}

.footer-legal {
  display: flex;
  gap: var(--spacing-lg);
  flex-wrap: wrap;
}

.footer-legal a {
  font-size: 0.8125rem;
  opacity: 0.6;
}

.footer-legal a:hover {
  opacity: 1;
}

/* ========================================
   Responsive Design
======================================== */
@media (max-width: 1024px) {
  .hero-features {
    grid-template-columns: 1fr;
  }
  
  .partners-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .projects-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  :root {
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
  }
  
  .nav {
    display: none;
  }
  
  .menu-toggle {
    display: flex;
  }
  
  .hero-content {
    padding: var(--spacing-xl) var(--spacing-md);
  }
  
  .hero-features {
    padding: var(--spacing-lg) var(--spacing-md);
  }
  
  .concerns-grid {
    grid-template-columns: 1fr;
  }
  
  .value-grid {
    grid-template-columns: 1fr;
  }
  
  .team-highlight {
    flex-direction: column;
    text-align: center;
  }
  
  .plans-grid {
    grid-template-columns: 1fr;
  }
  
  .projects-grid {
    grid-template-columns: 1fr;
  }
  
  .partners-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .contact-wrapper {
    grid-template-columns: 1fr;
  }
  
  .contact-form {
    grid-template-columns: 1fr;
    padding: var(--spacing-lg);
  }
  
  .contact-main {
    font-size: 1.0625rem;
    word-break: break-all;
  }
  
  .contact-info-item {
    padding: var(--spacing-sm);
  }
  
  .footer-main {
    grid-template-columns: 1fr;
  }
  
  .footer-links {
    grid-template-columns: 1fr;
  }
  
  .footer-bottom {
    flex-direction: column;
    gap: var(--spacing-sm);
    text-align: center;
  }
  
  .footer-legal {
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-sm);
  }
  
  .container {
    padding: 0 var(--spacing-md);
  }
  
  .header-inner {
    padding: 1rem var(--spacing-md);
  }
}

@media (max-width: 480px) {
  :root {
    --spacing-md: 1rem;
    --spacing-lg: 1.25rem;
  }
  
  .partners-grid {
    grid-template-columns: 1fr;
  }
  
  .hero-buttons {
    flex-direction: column;
  }
  
  .hero-buttons .btn {
    width: 100%;
  }
  
  .hero-title {
    font-size: 1.75rem;
  }
  
  .section-title {
    font-size: 1.5rem;
  }
  
  .concern-item {
    flex-direction: column;
    text-align: center;
  }
  
  .concern-icon {
    margin: 0 auto;
  }
}