/* Navy Glass Design System CSS */

/* ===========================
   CSS Variables / Design Tokens
   =========================== */
:root {
  /* Navy Brand Colors */
  --navy-brand: #1E3A5F;
  --navy-brand-light: #4A6FA5;
  --navy-brand-dark: #0F1E3D;
  
  /* Background Gradients */
  --gradient-base: linear-gradient(to bottom right, 
    rgba(74, 111, 165, 0.2),    /* #4A6FA5/20 */
    rgba(30, 58, 95, 0.1),      /* #1E3A5F/10 */
    rgba(59, 130, 246, 0.15)    /* #3B82F6/15 */
  );
  
  /* Glass Surface Colors */
  --surface-glass: rgba(255, 255, 255, 0.7);
  --surface-glass-hover: rgba(255, 255, 255, 0.8);
  --surface-glass-active: rgba(255, 255, 255, 0.85);
  --border-glass: rgba(255, 255, 255, 0.3);
  --border-glass-hover: rgba(255, 255, 255, 0.5);
  
  /* Text Colors */
  --text-primary: #0F1E3D;
  --text-secondary: #1E3A5F;
  --text-muted: rgba(30, 58, 95, 0.7);
  --text-inverse: #FFFFFF;
  
  /* Status Colors */
  --status-success: #10B981;
  --status-warning: #F59E0B;
  --status-error: #DC2626;
  --status-info: #3B82F6;
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;
  
  /* Typography */
  --font-primary: 'Noto Sans JP', sans-serif;
  --font-secondary: 'Poppins', sans-serif;
}

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

body {
  font-family: var(--font-primary);
  color: var(--text-primary);
  line-height: 1.6;
  background: var(--gradient-base);
  min-height: 100vh;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

/* ===========================
   Glass Components
   =========================== */

/* Glass Card Base */
.glass-card {
  background: var(--surface-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: 1rem;
  border: 1px solid var(--border-glass);
  box-shadow: 0 8px 32px rgba(15, 30, 61, 0.1);
  transition: all 0.3s ease;
}

.glass-card:hover {
  background: var(--surface-glass-hover);
  border-color: var(--border-glass-hover);
  box-shadow: 0 12px 40px rgba(15, 30, 61, 0.15);
  transform: translateY(-2px);
}

/* Glass Button */
.glass-btn {
  background: var(--surface-glass);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--border-glass);
  padding: 0.75rem 1.5rem;
  border-radius: 0.5rem;
  font-weight: 600;
  color: var(--text-primary);
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
  display: inline-block;
}

.glass-btn:hover {
  background: var(--surface-glass-hover);
  border-color: var(--border-glass-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(15, 30, 61, 0.1);
}

/* Primary Button */
.btn-primary {
  background: var(--navy-brand);
  color: var(--text-inverse);
  border: none;
  padding: 0.75rem 2rem;
  border-radius: 0.5rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  box-shadow: 0 4px 12px rgba(30, 58, 95, 0.2);
}

.btn-primary:hover {
  background: var(--navy-brand-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(30, 58, 95, 0.3);
}

/* ===========================
   Header Styles
   =========================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--surface-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-glass);
  transition: all 0.3s ease;
}

.header.scrolled {
  box-shadow: 0 4px 20px rgba(15, 30, 61, 0.1);
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-md) 0;
}

.logo {
  font-family: var(--font-secondary);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--navy-brand);
  text-decoration: none;
  transition: color 0.3s ease;
}

.logo:hover {
  color: var(--navy-brand-light);
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: var(--spacing-lg);
  align-items: center;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.3s ease;
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 0;
  height: 2px;
  background: var(--navy-brand);
  transition: width 0.3s ease;
}

.nav-link:hover {
  color: var(--navy-brand);
}

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

.nav-link--cta {
  background: var(--navy-brand);
  color: var(--text-inverse);
  padding: 0.5rem 1.25rem;
  border-radius: 0.5rem;
  transition: all 0.2s ease;
}

.nav-link--cta:hover {
  background: var(--navy-brand-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(30, 58, 95, 0.2);
}

.nav-link--cta::after {
  display: none;
}

/* ===========================
   Hero Section
   =========================== */
.hero {
  padding-top: calc(80px + var(--spacing-3xl));
  padding-bottom: var(--spacing-3xl);
  min-height: 80vh;
  display: flex;
  align-items: center;
}

.hero-content {
  background: var(--surface-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: 1.5rem;
  border: 1px solid var(--border-glass);
  padding: var(--spacing-2xl);
  box-shadow: 0 20px 60px rgba(15, 30, 61, 0.1);
  text-align: center;
  max-width: 900px;
  margin: 0 auto;
}

.hero-title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 700;
  color: var(--navy-brand-dark);
  margin-bottom: var(--spacing-lg);
  line-height: 1.2;
}

.hero-description {
  font-size: 1.125rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xl);
  line-height: 1.8;
}

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

.btn--slide {
  background: var(--surface-glass);
  color: var(--navy-brand);
  border: 2px solid var(--navy-brand);
  padding: 0.75rem 2rem;
  border-radius: 0.5rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.btn--slide:hover {
  background: var(--navy-brand);
  color: var(--text-inverse);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(30, 58, 95, 0.3);
}

/* ===========================
   Section Styles
   =========================== */
.section {
  padding: var(--spacing-3xl) 0;
}

.section-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  color: var(--navy-brand-dark);
  text-align: center;
  margin-bottom: var(--spacing-md);
  line-height: 1.3;
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--text-secondary);
  text-align: center;
  margin-bottom: var(--spacing-2xl);
  opacity: 0.9;
}

/* ===========================
   Value Grid
   =========================== */
.value-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-2xl);
}

.value-item {
  background: var(--surface-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: 1rem;
  border: 1px solid var(--border-glass);
  padding: var(--spacing-xl);
  box-shadow: 0 8px 32px rgba(15, 30, 61, 0.1);
  transition: all 0.3s ease;
}

.value-item:hover {
  background: var(--surface-glass-hover);
  border-color: var(--border-glass-hover);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(15, 30, 61, 0.15);
}

.value-number {
  font-size: 3rem;
  font-weight: 700;
  color: var(--navy-brand-light);
  opacity: 0.3;
  margin-bottom: var(--spacing-md);
  font-family: var(--font-secondary);
}

.value-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--navy-brand);
  margin-bottom: var(--spacing-sm);
}

.value-item p {
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ===========================
   Stats Section
   =========================== */
.stats {
  background: var(--surface-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-top: 1px solid var(--border-glass);
  border-bottom: 1px solid var(--border-glass);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-xl);
  margin-top: var(--spacing-2xl);
}

.stats-item {
  text-align: center;
  padding: var(--spacing-lg);
  background: rgba(255, 255, 255, 0.5);
  border-radius: 1rem;
  border: 1px solid var(--border-glass);
  transition: all 0.3s ease;
}

.stats-item:hover {
  background: var(--surface-glass-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(15, 30, 61, 0.1);
}

.stats-icon {
  width: 60px;
  height: 60px;
  margin: 0 auto var(--spacing-md);
  color: var(--navy-brand);
}

.stats-number {
  font-size: 3rem;
  font-weight: 700;
  color: var(--navy-brand-dark);
  font-family: var(--font-secondary);
}

.stats-suffix {
  font-size: 1.5rem;
  color: var(--navy-brand);
  font-weight: 600;
}

.stats-label {
  font-weight: 600;
  color: var(--text-secondary);
  margin-top: var(--spacing-sm);
}

.stats-detail {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-top: var(--spacing-xs);
}

/* ===========================
   Service Cards
   =========================== */
.service-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--spacing-xl);
  margin-top: var(--spacing-2xl);
}

.service-card {
  background: var(--surface-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: 1rem;
  border: 1px solid var(--border-glass);
  padding: var(--spacing-xl);
  box-shadow: 0 8px 32px rgba(15, 30, 61, 0.1);
  transition: all 0.3s ease;
}

.service-card:hover {
  background: var(--surface-glass-hover);
  border-color: var(--border-glass-hover);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(15, 30, 61, 0.15);
}

.service-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--navy-brand-dark);
  margin-bottom: var(--spacing-lg);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.service-badge {
  background: var(--navy-brand);
  color: var(--text-inverse);
  font-size: 0.75rem;
  padding: 0.25rem 0.75rem;
  border-radius: 2rem;
  font-weight: 600;
}

.service-badge--secondary {
  background: var(--navy-brand-light);
}

.service-list {
  list-style: none;
  color: var(--text-secondary);
  line-height: 2;
}

.service-list li {
  padding-left: 1.5rem;
  position: relative;
}

.service-list li::before {
  content: '•';
  position: absolute;
  left: 0;
  color: var(--navy-brand);
  font-weight: bold;
}

/* ===========================
   Workflow Section
   =========================== */
.workflow-steps {
  margin-top: var(--spacing-2xl);
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.workflow-step {
  display: flex;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
  padding: var(--spacing-lg);
  background: var(--surface-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: 1rem;
  border: 1px solid var(--border-glass);
  transition: all 0.3s ease;
}

.workflow-step:hover {
  background: var(--surface-glass-hover);
  border-color: var(--border-glass-hover);
  transform: translateX(8px);
  box-shadow: 0 8px 24px rgba(15, 30, 61, 0.1);
}

.workflow-number {
  font-size: 2rem;
  font-weight: 700;
  color: var(--navy-brand);
  font-family: var(--font-secondary);
  min-width: 3rem;
  text-align: center;
  opacity: 0.5;
}

.workflow-title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--navy-brand-dark);
  margin-bottom: var(--spacing-xs);
}

.workflow-step p {
  color: var(--text-secondary);
  margin: 0;
}

/* ===========================
   Contact Section
   =========================== */
.contact {
  background: var(--surface-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-top: 1px solid var(--border-glass);
  padding: var(--spacing-3xl) 0;
}

.contact-template-wrapper {
  position: relative;
  max-width: 600px;
  margin: var(--spacing-xl) auto;
}

.contact-template {
  background: rgba(255, 255, 255, 0.8);
  border: 2px solid var(--navy-brand-light);
  border-radius: 0.75rem;
  padding: var(--spacing-lg);
  font-family: monospace;
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.8;
}

.btn-copy {
  position: absolute;
  top: var(--spacing-md);
  right: var(--spacing-md);
  background: var(--navy-brand);
  color: var(--text-inverse);
  border: none;
  padding: 0.5rem;
  border-radius: 0.375rem;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
}

.btn-copy:hover {
  background: var(--navy-brand-dark);
  transform: scale(1.1);
}

.icon-copy,
.icon-copied {
  width: 20px;
  height: 20px;
  fill: currentColor;
}

/* ===========================
   Footer
   =========================== */
.footer {
  background: var(--navy-brand-dark);
  color: var(--text-inverse);
  padding: var(--spacing-xl) 0;
  text-align: center;
}

.footer p {
  opacity: 0.8;
  font-size: 0.875rem;
}

/* ===========================
   Animations
   =========================== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  opacity: 0;
  animation: fadeInUp 0.6s ease forwards;
}

.fade-in:nth-child(1) { animation-delay: 0.1s; }
.fade-in:nth-child(2) { animation-delay: 0.2s; }
.fade-in:nth-child(3) { animation-delay: 0.3s; }
.fade-in:nth-child(4) { animation-delay: 0.4s; }
.fade-in:nth-child(5) { animation-delay: 0.5s; }

/* ===========================
   Loading Screen
   =========================== */
.loading {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--gradient-base);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 9999;
  transition: opacity 0.5s ease;
}

.loading.hidden {
  opacity: 0;
  pointer-events: none;
}

.spinner {
  width: 50px;
  height: 50px;
  border: 3px solid var(--border-glass);
  border-top-color: var(--navy-brand);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* ===========================
   Responsive Design
   =========================== */
@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    background: var(--surface-glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    flex-direction: column;
    padding: var(--spacing-lg);
    gap: var(--spacing-md);
    border-bottom: 1px solid var(--border-glass);
    transform: translateY(-100%);
    transition: transform 0.3s ease;
    box-shadow: 0 4px 20px rgba(15, 30, 61, 0.1);
  }
  
  .nav-menu.active {
    transform: translateY(0);
  }
  
  .hero-cta {
    flex-direction: column;
    align-items: center;
  }
  
  .value-grid,
  .stats-grid,
  .service-grid {
    grid-template-columns: 1fr;
  }
  
  .hero-title {
    font-size: 2rem;
  }
  
  .section-title {
    font-size: 1.75rem;
  }
}

/* ===========================
   Promise Section (3つの成果物)
   =========================== */
.promise-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--spacing-xl);
  margin-top: var(--spacing-2xl);
}

.promise-item {
  background: var(--surface-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: 1.5rem;
  border: 1px solid var(--border-glass);
  padding: var(--spacing-2xl);
  box-shadow: var(--shadow-lg);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
  text-align: center;
}

.promise-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--navy-brand) 0%, var(--navy-brand-light) 50%, var(--navy-brand) 100%);
  border-radius: 1.5rem 1.5rem 0 0;
}

.promise-item:hover {
  background: var(--surface-glass-hover);
  border-color: var(--border-glass-hover);
  transform: translateY(-8px);
  box-shadow: 0 20px 60px rgba(15, 30, 61, 0.15);
}

.promise-icon {
  width: 80px;
  height: 80px;
  background: var(--navy-brand);
  color: var(--text-inverse);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--spacing-md);
  box-shadow: 0 8px 24px rgba(30, 58, 95, 0.2);
  transition: all 0.3s ease;
}

.promise-icon svg {
  width: 36px;
  height: 36px;
}

.promise-item:hover .promise-icon {
  background: var(--navy-brand-light);
  transform: scale(1.1);
}

.promise-number {
  position: absolute;
  top: 20px;
  right: 20px;
  width: 40px;
  height: 40px;
  background: var(--navy-brand-light);
  color: var(--text-inverse);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.125rem;
  font-family: var(--font-secondary);
  opacity: 0.7;
}

.promise-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--navy-brand-dark);
  margin-bottom: var(--spacing-md);
  line-height: 1.4;
}

.promise-description {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
  line-height: 1.6;
}

.promise-details {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  align-items: center;
}

.promise-tag {
  background: var(--navy-brand);
  color: var(--text-inverse);
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: 1rem;
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.05em;
}

.promise-benefit {
  font-size: 0.875rem;
  color: var(--text-muted);
  font-style: italic;
}

/* Promise Footer */
.promise-footer {
  margin-top: var(--spacing-3xl);
  padding: var(--spacing-xl);
  background: var(--surface-glass);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-radius: 1rem;
  border: 1px solid var(--border-glass);
}

.promise-notes {
  display: flex;
  justify-content: center;
  gap: var(--spacing-2xl);
  flex-wrap: wrap;
}

.promise-note-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.5;
}

.promise-note-icon {
  font-size: 1.2rem;
  opacity: 0.8;
}

/* Responsive Design */
@media (max-width: 768px) {
  .promise-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }
  
  .promise-item {
    padding: var(--spacing-xl);
  }
  
  .promise-notes {
    flex-direction: column;
    gap: var(--spacing-md);
    text-align: center;
  }
}

/* ===========================
   Utility Classes
   =========================== */
.text-center { text-align: center; }
.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mt-4 { margin-top: var(--spacing-xl); }
.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }
.mb-4 { margin-bottom: var(--spacing-xl); }