:root {
      --primary-blue: #0056B3;
      --teal-accent: #00D2FF;
      --bg-light: #f7f9fc;
      --text-dark: #1e1e1e;
      --text-muted: #555;
      --white: #ffffff;
    }
    
    header {
      background: linear-gradient(to right, var(--primary-blue), var(--teal-accent));
      color: var(--white);
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 1rem 2rem;
      flex-wrap: wrap;
      position: sticky;
      top: 0;
      z-index: 1000;
      box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    }

    .logo {
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .logo img {
      height: 50px;
    }

    .logo h1 {
      font-size: 1.6rem;
    }

    nav ul {
      list-style: none;
      display: flex;
      gap: 1.5rem;
      flex-wrap: wrap;
    }

    nav ul li a {
      text-decoration: none;
      color: var(--white);
      font-weight: 500;
      transition: color 0.3s;
    }

    nav ul li a:hover {
     color: #255b76;
    }

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

    body {
      font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
      background-color: var(--bg-light);
      color: var(--text-dark);
      line-height: 1.6;
    }
    footer {
      background: linear-gradient(to right, var(--primary-blue), var(--teal-accent));
      color: var(--white);
      text-align: center;
      padding: 1.5rem;
      margin-top: 4rem;
      font-size: 0.9rem;
    }