body {
    background-color: #eee;
    background-image: linear-gradient(135deg, rgba(255, 255, 255, .50) 25%, transparent 25%, transparent 50%, rgba(255, 255, 255, .50) 50%, rgba(255, 255, 255, .50) 75%, transparent 75%, transparent);
    background-size: 200px 200px;
    margin: 0;
    padding: 0;
}
h1 {
    font-family: 'El Messiri';
}
input {
  padding: 10px;
  font-size: 16px;
  margin: 5px;
  border-radius: 5px;
  font-family: El Messiri;
}
.main {
    border: 1px solid #999;
    border-radius: 20px;
    width: 90%;
    margin: 0 auto;
}
.main h2 {
    background-color: #FFFFFF;
    padding: 10px;
    margin-top: auto;
    border-radius: 20px 20px 0px 0px;
}
.main3, h2 {text-align: center;}
mark {
    background-color: #f7fc82;
    padding: 0px 15px;
}

button {
  padding: 10px;
  font-size: 16px;
  background: #008800;
  color: #FFF;
  font-family: El Messiri;
  border-radius: 5px;
}

.copy-btn {
    margin-top: 10px;
    padding: 8px 14px;
    background: #007bff;
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 15px;
    margin: 10px auto;
}

.copy-btn:hover {
    background: #005fcc;
}

.copy-alert {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: #28a745;
    color: white;
    padding: 10px 18px;
    border-radius: 6px;
    display: none;
    font-size: 14px;
}

.res {
    margin: 20px auto;
    background: mark;
    padding: 10px;
    display: none;
}