:root {
  --primary: #FF6B35;
  --secondary: #F7C59F;
  --accent: #EFEFD0;
  --dark: #004E89;
  --light: #FFF3E6;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Noto Sans JP", sans-serif;
}

body {
  background-color: var(--light);
  color: var(--dark);
}

header {
  background-color: var(--primary);
  color: white;
  padding: 1.5rem;
  text-align: center;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 1rem;
}

.header-logo {
  width: 50px;
  height: 50px;
  object-fit: contain;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem;
}

section {
  margin-bottom: 3rem;
}

.game-container {
  background-color: white;
  border-radius: 10px;
  padding: 1rem;
  box-shadow: 0 4px 6px rgba(0,0,0,0.1);
  margin: 2rem 0;
}

.game-container iframe {
  width: 100%;
  max-width: 1080px;
  height: 90vh;
  display: block;
  margin: 0 auto;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.game-container iframe.loaded {
  opacity: 1;
}

.instructions, .about-game, .tips, .strategy, .faq {
  background-color: white;
  padding: 2rem;
  border-radius: 10px;
  margin: 2rem 0;
  box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.tips-container, .qa-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin-top: 1rem;
}

h2, h3 {
  margin-bottom: 1rem;
  color: var(--dark);
}

h1 {
  color: white;
}

h1 a{
  color: white;
  text-decoration: none;
}

h2 {
  border-bottom: 2px solid var(--primary);
  padding-bottom: 0.5rem;
}

p {
  line-height: 1.6;
  margin-bottom: 1rem;
}

ul {
  list-style-position: inside;
  margin-bottom: 1rem;
}

ul li {
  margin-bottom: 0.5rem;
  line-height: 1.6;
}

.qa-item {
  background-color: var(--accent);
  padding: 1.5rem;
  border-radius: 8px;
  margin-bottom: 1rem;
}

.qa-item h3 {
  color: var(--primary);
  margin-bottom: 0.5rem;
}

footer {
  background-color: var(--primary);
  color: white;
  text-align: center;
  padding: 1rem;
  margin-top: 1rem;
}

footer p {
  margin-bottom: 0.5rem;
}

.footer-links {
  margin-top: 1rem;
}

.footer-links ul {
  list-style: none;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 2rem;
}

.footer-links a {
  color: white;
  text-decoration: none;
  transition: opacity 0.3s ease;
}

.footer-links a:hover {
  opacity: 0.8;
}

.footer-links .language-switch {
  margin-top: 1rem;
  text-align: center;
}

@media (max-width: 768px) {
  .container {
      padding: 1rem;
  }
  
  .header-logo {
    width: 40px;
    height: 40px;
  }
  .game-container iframe {
      height: 70vh;
  }

  .tips-container, .qa-container {
      grid-template-columns: 1fr;
  }

  section {
      margin-bottom: 2rem;
  }

  .footer-links ul {
    gap: 1rem;
    flex-direction: column;
    align-items: center;
  }
}