*{
    padding:0;
    margin:0;
    box-sizing: border-box;
}
html{
    --colorback:rgb(20, 119, 158);
    --colorborder:black;
}
.navbar{
    width: 100%;
    background-color:var(--colorback);
    position:fixed;
    
}
.logo{
    font-size: 25px;
}
.navbar .logo::selection{
    background-color: #fff;
    color: #000;
    
    
  }
/*contener of navbar**/
.navbar .contener{
    width: 80%;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: baseline;
    margin: auto;
}
/*Dropdown list**/
.ngvatione{
    width:100px;
    position: absolute;
    right:25px;
    top:45px;
    border: 3px var(--colorborder) solid;
    background-color:var(--colorback);
    opacity:0;
    transition:0.5s;
}

.ngvatione a{
    text-decoration: none;
    color:black;
}
.list{
    width: 100%;
    height:40px;
    background-color:var(--colorback);
    padding: 10px;
    font-size: 19px;
    position: relative;
}
.ngvatione::before{
    content: "";
    border-left: 8px transparent solid;
    border-bottom: 8px var(--colorborder)  solid;
    border-right: 8px transparent solid;
    position: absolute;
    top:-10px;
    right: 5px;
    
    
}
.list:hover{
    background-color: rgba(150, 148, 148, 0.822);
    font-size:20px;
}
.icon-list{ 
    font-size: 35px;
    padding: 5px;
    position: relative; 
}
.icon-list:hover .ngvatione {
    opacity:1;    
}
i:hover{
    transition:3s;
}
.preface{
    width: 100%;
    height:100vh;
    background-image:url(vecteezy_abstract-wave-line-pattern-on-dark-blue-background_49925799.jpg);
    background-size:cover;
    background-repeat: no-repeat;
    display: flex;
    justify-content: center;
    align-items: center;
    
}
/* start**/
.intro-section {
    width: 90%;
    max-width: 800px;
    /*margin: 30px auto;**/
    color: #cce7ff; /* لون فاتح يناسب الأزرق */
    text-align: center;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    position: relative;
    z-index: 10;
    padding: 30px 20px;
    background: rgba(0, 51, 102, 0.7); /* خلفية نصف شفافة بتدرج أزرق */
    border-radius: 12px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);

  }
  
  .intro-section h1 {
    font-size:3rem;
    font-weight: 700;
    margin-bottom: 20px;
    text-shadow: 2px 2px 6px #001f33;
    letter-spacing: 1px;
  }
  
  .intro-section p {
    font-size: 1.50rem;
    margin-bottom: 30px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.6;
    text-shadow: 1px 1px 4px #001f33;
  }
  .intro-section p::selection{
    background-color: #fff;
    color: #000;
  }
  .intro-section h1::selection{
    background-color: #fff;
    color: #000;
  }
  
  .subscribe-form {
    display: flex;
    justify-content: center;
    gap: 15px;
    flex-wrap: wrap;
  }
  
  .subscribe-form input[type="email"] {
    padding: 12px 18px;
    font-size: 1rem;
    border: none;
    border-radius: 6px;
    width: 270px;
    max-width: 100%;
    box-shadow: inset 0 0 5px rgba(0,0,0,0.2);
    transition: box-shadow 0.3s ease;
  }
  
  .subscribe-form input[type="email"]:focus {
    outline: none;
    box-shadow: 0 0 8px #0099ff;
  }
  
  .subscribe-form input[type="email"]::selection{
    background-color: rgb(0, 0, 0);
    color:#ffffff;
  }

  .subscribe-form button {
    background: linear-gradient(45deg, #00aaff, #006f99);
    border: none;
    color: white;
    font-weight: 700;
    padding: 12px 25px;
    border-radius: 6px;
    cursor: pointer;
    transition: background .4s ease;
    box-shadow: 0 4px 10px rgba(0, 136, 204, 0.6);
  }
  .subscribe-form button::selection{
    background-color: white;
    color:#000;
  }
  
  .subscribe-form button:hover {
    background: linear-gradient(45deg, #006f99, #003f55);
    box-shadow: 0 6px 14px rgba(0, 95, 122, 0.8);
  }
  
  @media (min-width:32px) and (max-width: 480px) {
    .subscribe-form {
      flex-direction: column;
      gap: 12px;
    }
    .subscribe-form input[type="email"],
    .subscribe-form button {
      width: 100%;
    }
    .intro-section h1 {
        font-size: 40px;
    }
    .intro-section p {
        font-size:16px;
    }
  }
  @media (min-width: 429px) and (max-width: 525px) {
    .intro-section h1 {
        font-size: 35px;
    }
  }
  @media (min-width:305px) and (max-width: 428px) {
    .intro-section h1 {
        font-size: 20px;
    }
    .intro-sectionp {
        font-size:16px;
    }

  }

  /* end**/
  .end{
    width: 100%;
    height: 10vh;
    background-color: rgba(37, 34, 34, 0.726);
  }
  .end p{
    font-size: 18px;
    color: white;
    text-align: right;
    padding: 15px 20px;
  }
.end p::selection{
  background-color: #000;

}