:root {
    --primary-color: #c92424;
    --secondary-color: #666;
    --accent-color: #333;
    --bg-color: #f9f9f9;
    --text-color: #222;
    --font-family: 'Segoe UI', sans-serif;
  }
  
  * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }
  
  body {
    font-family: var(--font-family);
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
  }
  
  header {
    color: #fff;
    padding: 20px 0;
  }
  
  header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
  }

  header nav ul {
    list-style: none;
    display: flex;
    gap: 15px;
  }

  header nav a {
    color: var(--text-color);
    text-decoration: none;
    font-size: 16px;
  }
  
  section {
    padding: 60px 20px;
  }

  #about {
    background: linear-gradient(to right, rgb(29, 28, 28), rgb(202, 0, 0));
    padding-top: 60px;
    padding-bottom: 40px;
  }

  #about p {
    text-align: center;
    color: #fff;
  }
  
  .container {
    max-width: 1200px;
    margin: 0 auto;
  }
  
  h2 {
    font-size: 28px;
    margin-bottom: 20px;
    color: var(--accent-color);
  }
  
  p {
    margin-bottom: 20px;
    color: var(--secondary-color);
  }
  
  .grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
  }
  
  .card {
    background-color: #fff;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    text-align: center;
    overflow: hidden;
  }
  
  .card img {
    max-width: 100%;
    border-radius: 10px;
    margin-bottom: 10px;
    height: auto;
    display: block;
  }
  
  footer {
    background: linear-gradient(to right, rgb(29, 28, 28), rgb(202, 0, 0));
    color: #fff;
    text-align: center;
    padding: 10px 0;
    margin-top: 20px;
  }
  
  footer p {
    color: #fff;
    font-size: 14px;
  }

  button {
    background-color: #0d6efd;
    border-width: 0px;
    border-radius: 12%;
    padding-left: 15px;
    padding-right: 15px;
    padding-top: 7px;
    padding-bottom: 7px;
  }

  button:hover {
    filter: brightness(90%);
  }

  button a {
    text-decoration: none;
    color: #fff;
  }

  .ryuslogo {
    border-radius: 15%;
  }

  .nav-item {
    text-align: center;
  }

  .design-visuals {
    padding-top: 30px;
  }

.hamburger {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 30px;
  height: 30px;
  cursor: pointer;
  position: absolute;
  top: 50px;
  right: 20px;
  z-index: 1000;
}

.hamburger div {
  background-color: #333;
  height: 3px;
  width: 100%;
  border-radius: 2px;
  transition: all 0.3s ease;
}

.nav-links {
  display: flex;
  gap: 20px;
  align-items: center;
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
    flex-direction: column;
    background-color: #fff;
    position: absolute;
    top: 100px;
    right: 20px;
    width: 200px;
    padding: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    border-radius: 5px;
  }

  .nav-links.active {
    display: flex;
  }

  .hamburger {
    display: flex;
  }
}