:root {
  --navy: #000080;
  --white: #ffffff;
}


* {
    box-sizing: border-box;
  }
  
/* Navigation */
.logo img{
  height:50px;
  float: left;
  margin-right: 20px;
}
.navbar {
  position: fixed;
  top: 0;
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 5%;
  background: rgba(0,0,128,0.95);
  color: var(--white);
  z-index: 1000;
  transition: var(--transition);
}

.logo {
  font-size: 1.5rem;
  font-weight: bold;
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  gap: 2rem;
}

.nav-links a {
  color: var(--white);
  text-decoration: none;
  transition: var(--transition);
}

.nav-links a:hover,
.nav-links a.active {
  color: #ffd700;
}

.menu-toggle {
  display: none;
  cursor: pointer;
}
/* Hết phần navigation bar*/

  body {
    font-family: Arial, sans-serif;
    background: #f7f7f7;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    flex-direction: column;
  }
  
  .container {
    background: #fff;
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    max-width: 500px;
    width: 90%;
    padding-top:100px;
  }
  
  h2 {
    text-align: center;
    margin-bottom: 20px;
    color: #333;
  }
  
  label {
    display: block;
    margin-bottom: 6px;
    font-weight: bold;
  }
  
  input, select, textarea {
    width: 100%;
    padding: 10px;
    margin-bottom: 15px;
    border-radius: 6px;
    border: 1px solid #ccc;
    font-size: 16px;
  }
  
  textarea {
    resize: vertical;
  }
  
  button {
    background-color: #2a69c8;
    color: white;
    border: none;
    padding: 12px 20px;
    width: 100%;
    border-radius: 8px;
    font-size: 16px;
    cursor: pointer;
    transition: background-color 0.3s ease;
  }
  
  button:hover {
    background-color: #218838;
  }
  
  @media (max-width: 600px) {
    .container {
      padding: 15px;
    }
  }

  @media (max-width: 768px) {
    .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 60px;
        left: 0;
        width: 100%;
        background: rgba(0,0,128,0.95);
        padding: 1rem;
    }
    .nav-links.active {
        display: flex;
    }
    .menu-toggle {
        display: block;
        color: #ffffff;
        font-size: 1.8rem;
        margin-right: 20px;
        cursor: pointer;
    }
    .container{
      padding-top: 120px;
    }
    h2{
      font-size: 24px;
      margin-top: 20px;
    }
  }

/* Footer */
.footer {
  background-color: var(--navy);
  color: var(--white);
  padding: 4rem 5%;
  margin-top: 4rem;
  width: 100%;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 3rem;
  max-width: 1200px;
  margin: 0 auto;
}

.footer-col h3 {
  margin-bottom: 1.5rem;
  font-size: 1.2rem;
  text-transform: uppercase;
}

.footer-col p {
  margin: 0.5rem 0;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.social-links {
  display: flex;
  gap: 1rem;
  margin-top: 1rem;
}

.social-links a {
  color: var(--white);
  font-size: 1.5rem;
  transition: var(--transition);
}

.social-links a:hover {
  color: #ffd700;
  transform: translateY(-2px);
}