/* Landing Page Stylesheet */

:root {
  /* Colors */
  --primary-dark: #0a2540;     /* Deep navy blue */
  --primary-blue: #1e3a8a;     /* Accent navy */
  --accent-blue: #2563eb;      /* Vibrant blue */
  --accent-hover: #1d4ed8;     /* Darker vibrant blue */
  --bg-white: #ffffff;
  --bg-light: #f8fafc;
  --bg-card: #ffffff;
  --text-dark: #0f172a;
  --text-body: #334155;
  --text-muted: #64748b;
  --border-color: #e2e8f0;
  
  /* Alerts */
  --danger-bg: #fef2f2;
  --danger-border: #fca5a5;
  --danger-text: #991b1b;
  --success-bg: #f0fdf4;
  --success-border: #bbf7d0;
  --success-text: #166534;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 10px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.05);

  /* Transitions */
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Noto Sans JP', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--text-body);
  background-color: var(--bg-white);
  line-height: 1.7;
}

/* Typography */
h1, h2, h3, h4 {
  color: var(--text-dark);
  font-weight: 700;
  line-height: 1.3;
}

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

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

/* Layout Utilities */
.section-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 80px 24px;
}

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

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  border-radius: 8px;
  cursor: pointer;
  transition: var(--transition);
  text-align: center;
  white-space: nowrap;
}

.btn-sm {
  padding: 8px 16px;
  font-size: 0.875rem;
}

.btn-md {
  padding: 12px 24px;
  font-size: 0.95rem;
}

.btn-lg {
  padding: 14px 32px;
  font-size: 1rem;
}

.btn-primary {
  background-color: var(--accent-blue);
  color: white;
  border: 1px solid var(--accent-blue);
  box-shadow: 0 4px 6px -1px rgba(37, 99, 235, 0.15);
}

.btn-primary:hover {
  background-color: var(--accent-hover);
  border-color: var(--accent-hover);
  color: white;
  transform: translateY(-1px);
  box-shadow: 0 8px 12px -1px rgba(37, 99, 235, 0.25);
}

.btn-secondary {
  background-color: var(--primary-dark);
  color: white;
  border: 1px solid var(--primary-dark);
  box-shadow: 0 4px 6px -1px rgba(10, 37, 64, 0.1);
}

.btn-secondary:hover {
  background-color: #0d3358;
  border-color: #0d3358;
  color: white;
  transform: translateY(-1px);
  box-shadow: 0 8px 12px -1px rgba(10, 37, 64, 0.2);
}

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

.btn-outline:hover {
  background-color: var(--primary-dark);
  color: white;
  transform: translateY(-1px);
}

.btn-icon {
  width: 18px;
  height: 18px;
  margin-left: 8px;
  transition: var(--transition);
}

.btn:hover .btn-icon {
  transform: translateX(3px);
}

/* Header & Navigation */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border-color);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px 24px;
}

.logo {
  font-family: 'Outfit', sans-serif;
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--primary-dark);
  display: flex;
  align-items: center;
}

.logo-text {
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--accent-blue) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav {
  display: flex;
  gap: 28px;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-body);
}

.nav-link:hover {
  color: var(--accent-blue);
}

/* Hero Section */
.hero {
  background: radial-gradient(circle at 80% 20%, #f0f7ff 0%, #ffffff 60%);
  overflow: hidden;
  border-bottom: 1px solid var(--border-color);
}

.hero-container {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
  padding: 100px 24px;
}

.hero-content {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.badge {
  display: inline-block;
  background-color: #eff6ff;
  color: var(--accent-blue);
  font-size: 0.85rem;
  font-weight: 700;
  padding: 6px 14px;
  border-radius: 50px;
  border: 1px solid #bfdbfe;
  margin-bottom: 20px;
}

.hero-title {
  font-size: 2.75rem;
  line-height: 1.25;
  color: var(--primary-dark);
  margin-bottom: 24px;
  letter-spacing: -0.02em;
}

.hero-description {
  font-size: 1.125rem;
  color: var(--text-body);
  margin-bottom: 36px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: 16px;
}

/* Chat Mockup in Hero */
.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
}

.chat-mockup {
  width: 100%;
  max-width: 440px;
  background: white;
  border-radius: 16px;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.chat-mockup-header {
  background-color: var(--primary-dark);
  padding: 16px 20px;
  display: flex;
  align-items: center;
  gap: 16px;
}

.mockup-dots {
  display: flex;
  gap: 6px;
}

.mockup-dots span {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
}

.mockup-dots span:nth-child(1) { background-color: #ef4444; }
.mockup-dots span:nth-child(2) { background-color: #f59e0b; }
.mockup-dots span:nth-child(3) { background-color: #10b981; }

.mockup-title {
  color: white;
  font-size: 0.9rem;
  font-weight: 700;
}

.chat-mockup-body {
  padding: 24px;
  background-color: #f8fafc;
  display: flex;
  flex-direction: column;
  gap: 16px;
  min-height: 280px;
}

.chat-bubble {
  display: flex;
  gap: 12px;
  max-width: 90%;
}

.bubble-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.8rem;
  flex-shrink: 0;
}

.bubble-user {
  align-self: flex-end;
  flex-direction: row-reverse;
}

.bubble-user .bubble-avatar {
  background-color: var(--accent-blue);
  color: white;
}

.bubble-user .bubble-text {
  background-color: #eff6ff;
  border: 1px solid #bfdbfe;
  color: var(--primary-dark);
  padding: 12px 16px;
  border-radius: 12px 0 12px 12px;
  font-size: 0.9rem;
}

.bubble-assistant .bubble-avatar {
  background-color: var(--primary-dark);
  color: white;
}

.bubble-assistant .bubble-text {
  background-color: white;
  border: 1px solid var(--border-color);
  color: var(--text-dark);
  padding: 12px 16px;
  border-radius: 0 12px 12px 12px;
  font-size: 0.9rem;
  box-shadow: var(--shadow-sm);
}

.bubble-assistant strong {
  color: var(--accent-blue);
}

.bubble-source {
  margin-top: 10px;
  padding-top: 8px;
  border-top: 1px dashed var(--border-color);
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
}

.source-tag {
  background-color: var(--bg-light);
  color: var(--text-muted);
  padding: 2px 6px;
  border-radius: 4px;
  font-weight: 600;
}

.source-link {
  color: var(--accent-blue);
  font-weight: 600;
  text-decoration: underline;
}

/* Animations */
.animate-bubble {
  animation: slideIn 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Sections Common Header */
.section-header {
  text-align: center;
  margin-bottom: 56px;
}

.section-subtitle {
  font-family: 'Outfit', sans-serif;
  color: var(--accent-blue);
  font-weight: 800;
  letter-spacing: 0.15em;
  font-size: 0.85rem;
  text-transform: uppercase;
  display: block;
  margin-bottom: 12px;
}

.section-title {
  font-size: 2.25rem;
  color: var(--primary-dark);
  margin-bottom: 16px;
  letter-spacing: -0.01em;
}

.section-desc {
  max-width: 600px;
  margin: 0 auto;
  color: var(--text-muted);
  font-size: 1.05rem;
}

/* Features Section */
.features {
  border-top: 1px solid var(--border-color);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.feature-card {
  background: var(--bg-card);
  padding: 40px 32px;
  border-radius: 12px;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: #cbd5e1;
}

.feature-icon {
  width: 56px;
  height: 56px;
  border-radius: 12px;
  background-color: #eff6ff;
  color: var(--accent-blue);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  border: 1px solid #dbeafe;
}

.feature-icon svg {
  width: 28px;
  height: 28px;
}

.feature-card h3 {
  font-size: 1.25rem;
  margin-bottom: 16px;
  color: var(--primary-dark);
}

.feature-card p {
  color: var(--text-body);
  font-size: 0.95rem;
}

/* How to use Section */
.how-to-use {
  border-top: 1px solid var(--border-color);
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin-bottom: 48px;
}

.step-item {
  position: relative;
  background: white;
  padding: 36px 28px;
  border-radius: 12px;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  text-align: center;
}

.step-badge {
  display: inline-block;
  background-color: var(--primary-dark);
  color: white;
  font-family: 'Outfit', sans-serif;
  font-size: 0.8rem;
  font-weight: 800;
  padding: 4px 12px;
  border-radius: 50px;
  margin-bottom: 20px;
}

.step-item h3 {
  font-size: 1.2rem;
  margin-bottom: 12px;
}

.step-item p {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.guide-link-block {
  text-align: center;
}

/* Demo Section */
.demo {
  border-top: 1px solid var(--border-color);
}

.demo-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  background-color: var(--bg-light);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 40px;
  box-shadow: var(--shadow-sm);
}

.demo-info, .demo-downloads {
  display: flex;
  flex-direction: column;
}

.demo-card h3 {
  font-size: 1.35rem;
  color: var(--primary-dark);
  margin-bottom: 20px;
  border-bottom: 2px solid var(--border-color);
  padding-bottom: 12px;
}

.credentials-box {
  background: white;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 20px;
  margin-bottom: 28px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  box-shadow: var(--shadow-sm);
}

.credential-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.credential-label {
  font-weight: 700;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.credential-value {
  font-family: ui-monospace, SFMono-Regular, Monaco, Consolas, monospace;
  font-weight: 700;
  color: var(--text-dark);
  font-size: 0.95rem;
  user-select: all;
  background-color: #f1f5f9;
  padding: 4px 10px;
  border-radius: 4px;
  border: 1px solid #cbd5e1;
}

.demo-info .btn {
  align-self: flex-start;
}

.download-tip {
  font-size: 0.88rem;
  color: var(--success-text);
  background-color: var(--success-bg);
  border: 1px solid var(--success-border);
  padding: 12px 16px;
  border-radius: 8px;
  margin-bottom: 20px;
  font-weight: 600;
}

.download-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.download-link-item {
  display: flex;
  align-items: center;
  gap: 16px;
  background: white;
  border: 1px solid var(--border-color);
  padding: 14px 20px;
  border-radius: 8px;
  transition: var(--transition);
}

.download-link-item:hover {
  border-color: var(--accent-blue);
  transform: translateX(4px);
  box-shadow: var(--shadow-sm);
}

.download-link-item .file-icon {
  width: 24px;
  height: 24px;
  color: var(--accent-blue);
  flex-shrink: 0;
}

.download-file-info {
  display: flex;
  flex-direction: column;
}

.file-title {
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--text-dark);
}

.file-meta {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 2px;
}

/* Pricing Section */
.pricing {
  border-top: 1px solid var(--border-color);
  text-align: center;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  max-width: 1100px;
  margin: 40px auto 0;
  align-items: stretch;
}

.pricing-card {
  background: white;
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 40px 24px;
  box-shadow: var(--shadow-md);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  position: relative;
}

.pricing-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg), 0 12px 20px -8px rgba(0, 0, 0, 0.1);
  border-color: #cbd5e1;
}

.pricing-card.featured {
  border: 2px solid var(--accent-blue);
  box-shadow: var(--shadow-lg), 0 10px 15px -3px rgba(37, 99, 235, 0.1);
  transform: scale(1.03);
}

.pricing-card.featured:hover {
  transform: scale(1.03) translateY(-8px);
  box-shadow: var(--shadow-lg), 0 20px 25px -5px rgba(37, 99, 235, 0.2);
}

.plan-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, var(--accent-blue) 0%, var(--primary-blue) 100%);
  color: white;
  font-size: 0.75rem;
  font-weight: 800;
  padding: 4px 16px;
  border-radius: 50px;
  white-space: nowrap;
  box-shadow: 0 4px 6px rgba(37, 99, 235, 0.2);
}

.pricing-card-title {
  font-size: 1.5rem;
  margin-bottom: 12px;
  color: var(--primary-dark);
}

.pricing-card-desc {
  color: var(--text-muted);
  font-size: 0.875rem;
  line-height: 1.5;
  margin-bottom: 24px;
  min-height: 66px;
  text-align: left;
}

.pricing-price {
  margin-bottom: 16px;
  padding: 16px 0;
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  background-color: var(--bg-light);
  border-radius: 8px;
}

.pricing-card.featured .pricing-price {
  background-color: #eff6ff;
  border-color: #bfdbfe;
}

.price-currency {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.price-value {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--primary-dark);
}

.price-tax {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.price-monthly {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-top: 4px;
}

.price-monthly.highlighted {
  color: var(--accent-blue);
  font-size: 1.25rem;
}

.pricing-price-sub {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 24px;
  min-height: 24px;
  text-align: left;
}

.plan-features {
  list-style: none;
  text-align: left;
  margin-bottom: 32px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  flex-grow: 1;
}

.plan-features li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.875rem;
  color: var(--text-body);
}

.feature-check-icon {
  width: 18px;
  height: 18px;
  color: var(--accent-blue);
  flex-shrink: 0;
  margin-top: 2px;
}

.plan-btn {
  width: 100%;
  margin-top: auto;
}

/* Cautions Section */
.cautions {
  border-top: 1px solid var(--border-color);
}

.caution-box {
  background-color: var(--danger-bg);
  border-left: 4px solid #ef4444;
  border-right: 1px solid var(--danger-border);
  border-top: 1px solid var(--danger-border);
  border-bottom: 1px solid var(--danger-border);
  padding: 24px;
  border-radius: 0 12px 12px 0;
  display: flex;
  gap: 20px;
  max-width: 800px;
  margin: 0 auto 80px;
}

.caution-icon {
  flex-shrink: 0;
  color: #ef4444;
  display: flex;
  align-items: flex-start;
}

.caution-icon svg {
  width: 28px;
  height: 28px;
}

.caution-content h4 {
  color: var(--danger-text);
  font-size: 1.05rem;
  margin-bottom: 8px;
}

.caution-content p {
  color: var(--danger-text);
  font-size: 0.925rem;
  font-weight: 600;
}

.caution-content p + p {
  margin-top: 8px;
}

/* Footer */
.footer {
  background-color: var(--primary-dark);
  color: rgba(255, 255, 255, 0.7);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
  padding: 32px 24px;
  font-size: 0.88rem;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.7);
  font-weight: 600;
}

.footer-links a:hover {
  color: white;
}

/* Responsive Adjustments */
@media (max-width: 992px) {
  .hero-container {
    grid-template-columns: 1fr;
    gap: 56px;
    text-align: center;
    padding: 80px 24px;
  }

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

  .hero-title {
    font-size: 2.25rem;
  }

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

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

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

  .pricing-grid {
    grid-template-columns: 1fr;
    gap: 40px;
    max-width: 500px;
    margin: 40px auto 0;
  }

  .pricing-card.featured {
    transform: none;
  }

  .pricing-card.featured:hover {
    transform: translateY(-8px);
  }

  .demo-card {
    grid-template-columns: 1fr;
    gap: 32px;
    padding: 24px;
  }

  .demo-info .btn {
    align-self: center;
    width: 100%;
  }
}

@media (max-width: 768px) {
  .header-container {
    flex-direction: column;
    gap: 16px;
    padding: 16px;
  }

  .nav {
    flex-wrap: wrap;
    justify-content: center;
    gap: 16px 20px;
  }

  .header-cta {
    width: 100%;
  }

  .header-cta .btn {
    width: 100%;
  }

  .section-title {
    font-size: 1.75rem;
  }

  .pricing-card {
    padding: 32px 20px;
  }

  .footer-container {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }
}