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


body {
   font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
   background-color: #e6f9f8;
   color: #222;
   line-height: 1.6;
}




header {
   background-color: lightsalmon;
   color: white;
   padding: 25px 0;
   text-align: center;
}


header h1 {
   font-size: 2.7em;
   letter-spacing: 1px;
}


nav {
   background-color: lightskyblue;
   box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
}


nav ul {
   list-style: none;
   display: flex;
   justify-content: center;
   flex-wrap: wrap;
   padding: 10px 0;
}


nav ul li {
   margin: 10px 15px;
}


nav ul li a {
   color: white;
   text-decoration: none;
   font-weight: bold;
   padding: 10px 18px;
   background-color: #0077b6;
   border-radius: 20px;
   transition: background-color 0.3s ease, transform 0.2s ease;
}


nav ul li a:hover {
   background-color: #00a896;
   transform: scale(1.05);
}


main {
   max-width: 950px;
   margin: 40px auto;
   padding: 0 25px 30px 25px;
   background: #ffffff;
   border-radius: 12px;
   box-shadow: 0 8px 20px rgba(0, 128, 128, 0.1);
}


main h2 {
   color: orange;
   margin-top: 25px;
   border-bottom: 2px solid orange;
   padding-bottom: 5px;
}


main h3 {
   color: orange;
   margin-top: 20px;
}


main img {
   width: 100%;
   max-width: 850px;
   display: block;
   margin: 20px auto;
   border-radius: 12px;
   box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}


main p {
   margin-bottom: 20px;
   color: #333;
   font-size: 1.05em;
}


footer {
   background-color: lightsalmon;
   color: white;
   text-align: center;
   padding: 18px 0;
   margin-top: 40px;
}


footer a {
   color: #a8dadc;
   text-decoration: none;
   font-weight: bold;
}


footer a:hover {
   text-decoration: underline;
}


@media (max-width: 600px) {
   header h1 {
       font-size: 2em;
   }


   nav ul {
       flex-direction: column;
       align-items: center;
   }


   nav ul li {
       margin: 8px 0;
   }


   main {
       padding: 0 15px;
   }
}