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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Hiragino Sans', 'Noto Sans JP', sans-serif;
  line-height: 1.6;
  color: #1a1a2e;
  background: #ffffff;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid #e5e7eb;
  z-index: 100;
}

.header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 64px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 1.25rem;
  color: #1a1a2e;
  text-decoration: none;
}

.logo-icon {
  font-size: 1.5rem;
}

.nav {
  display: flex;
  gap: 32px;
}

.nav a {
  color: #64748b;
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s;
}

.nav a:hover {
  color: #0a7ea4;
}

/* Hero */
.hero {
  padding: 160px 0 100px;
  background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
  text-align: center;
}

.hero-title {
  font-size: 3rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 24px;
  color: #1a1a2e;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: #64748b;
  margin-bottom: 40px;
}

.hero-buttons {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 14px 32px;
  border-radius: 12px;
  font-weight: 600;
  text-decoration: none;
  transition: transform 0.2s, box-shadow 0.2s;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background: #0a7ea4;
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(10, 126, 164, 0.3);
}

.btn-primary:hover {
  box-shadow: 0 6px 20px rgba(10, 126, 164, 0.4);
}

.btn-secondary {
  background: #ffffff;
  color: #0a7ea4;
  border: 2px solid #0a7ea4;
}

.btn-secondary:hover {
  background: #f0f9ff;
}

/* Features */
.features {
  padding: 100px 0;
  background: #ffffff;
}

.section-title {
  font-size: 2rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 60px;
  color: #1a1a2e;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 32px;
}

.feature-card {
  background: #f8fafc;
  border-radius: 16px;
  padding: 40px 32px;
  text-align: center;
  transition: transform 0.2s, box-shadow 0.2s;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
}

.feature-icon {
  font-size: 3rem;
  margin-bottom: 20px;
}

.feature-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: #1a1a2e;
}

.feature-card p {
  color: #64748b;
  font-size: 0.95rem;
}

/* Contact */
.contact {
  padding: 100px 0;
  background: #f8fafc;
  text-align: center;
}

.contact-text {
  color: #64748b;
  margin-bottom: 16px;
}

.contact-email {
  display: inline-block;
  font-size: 1.25rem;
  font-weight: 600;
  color: #0a7ea4;
  text-decoration: none;
}

.contact-email:hover {
  text-decoration: underline;
}

/* Footer */
.footer {
  padding: 48px 0 32px;
  background: #1a1a2e;
  color: #94a3b8;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 32px;
  flex-wrap: wrap;
  gap: 24px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  color: #ffffff;
  font-weight: 700;
}

.footer-links {
  display: flex;
  gap: 24px;
}

.footer-links a {
  color: #94a3b8;
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.2s;
}

.footer-links a:hover {
  color: #ffffff;
}

.copyright {
  text-align: center;
  font-size: 0.85rem;
  padding-top: 24px;
  border-top: 1px solid #334155;
}

/* Responsive */
@media (max-width: 768px) {
  .hero-title {
    font-size: 2rem;
  }
  
  .hero-subtitle {
    font-size: 1rem;
  }
  
  .nav {
    gap: 16px;
  }
  
  .section-title {
    font-size: 1.5rem;
  }
  
  .footer-content {
    flex-direction: column;
    text-align: center;
  }
}