* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: "Hiragino Sans", "Yu Gothic", "Meiryo", sans-serif;
  line-height: 1.6;
  color: #333;
  background-color: #f8f9fa;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header Styles */
.navbar {
  background: #1a365d;
  color: white;
  padding: 1rem 0;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo h1 {
  font-size: 1.8rem;
  margin-bottom: 0.2rem;
}

.tagline {
  font-size: 0.9rem;
  opacity: 0.8;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 2rem;
}

.nav-menu a {
  color: white;
  text-decoration: none;
  padding: 0.5rem 1rem;
  border-radius: 4px;
  transition: background-color 0.3s;
}

.nav-menu a:hover,
.nav-menu a.active {
  background-color: #2d5a87;
}

/* Hero Section */
.hero {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  padding: 4rem 0;
  text-align: center;
}

.hero-content {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 20px;
}

.hero h2 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.hero p {
  font-size: 1.2rem;
  margin-bottom: 2rem;
  opacity: 0.9;
}

.cta-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.btn-primary,
.btn-secondary {
  padding: 1rem 2rem;
  border-radius: 6px;
  text-decoration: none;
  font-weight: bold;
  transition: transform 0.3s, box-shadow 0.3s;
}

.btn-primary {
  background: #ff6b6b;
  color: white;
}

.btn-secondary {
  background: white;
  color: #333;
}

.btn-primary:hover,
.btn-secondary:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

/* Features Section */
.features {
  padding: 4rem 0;
  background: white;
}

.features h3 {
  text-align: center;
  font-size: 2rem;
  margin-bottom: 3rem;
  color: #1a365d;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
}

.feature-card {
  text-align: center;
  padding: 2rem;
  border-radius: 8px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  transition: transform 0.3s;
}

.feature-card:hover {
  transform: translateY(-5px);
}

.feature-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.feature-card h4 {
  font-size: 1.3rem;
  margin-bottom: 1rem;
  color: #1a365d;
}

/* Market Overview */
.market-overview {
  padding: 4rem 0;
  background: #f8f9fa;
}

.market-overview h3 {
  text-align: center;
  font-size: 2rem;
  margin-bottom: 3rem;
  color: #1a365d;
}

.market-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
}

.market-card {
  background: white;
  padding: 2rem;
  border-radius: 8px;
  text-align: center;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.market-card h4 {
  color: #666;
  margin-bottom: 1rem;
}

.price {
  font-size: 2rem;
  font-weight: bold;
  color: #1a365d;
  margin-bottom: 0.5rem;
}

.change {
  font-weight: bold;
}

.change.positive {
  color: #28a745;
}

.change.negative {
  color: #dc3545;
}

.market-note {
  text-align: center;
  font-size: 0.9rem;
  color: #666;
  font-style: italic;
}

/* Latest Articles */
.latest-articles {
  padding: 4rem 0;
  background: white;
}

.latest-articles h3 {
  text-align: center;
  font-size: 2rem;
  margin-bottom: 3rem;
  color: #1a365d;
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.article-card {
  padding: 2rem;
  border-radius: 8px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  transition: transform 0.3s;
}

.article-card:hover {
  transform: translateY(-3px);
}

.article-card h4 {
  color: #1a365d;
  margin-bottom: 1rem;
}

.article-card p {
  color: #666;
  margin-bottom: 1rem;
}

.read-more {
  color: #667eea;
  text-decoration: none;
  font-weight: bold;
}

.read-more:hover {
  text-decoration: underline;
}

/* Footer */
footer {
  background: #1a365d;
  color: white;
  padding: 3rem 0 1rem;
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
}

.footer-section h4 {
  margin-bottom: 1rem;
  color: #fff;
}

.footer-section ul {
  list-style: none;
}

.footer-section ul li {
  margin-bottom: 0.5rem;
}

.footer-section a {
  color: #ccc;
  text-decoration: none;
}

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

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  margin-top: 2rem;
  border-top: 1px solid #2d5a87;
  color: #ccc;
}

/* Responsive Design */
@media (max-width: 768px) {
  .nav-container {
    flex-direction: column;
    gap: 1rem;
  }

  .nav-menu {
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
  }

  .hero h2 {
    font-size: 2rem;
  }

  .cta-buttons {
    flex-direction: column;
    align-items: center;
  }

  .btn-primary,
  .btn-secondary {
    width: 200px;
  }
}