* {
margin: 0;
padding: 0;
box-sizing: border-box;
}
body {
    display: flex;
    justify-content: center;
    align-content: center;
    min-height: 100vh;
    background: rgb(43, 40, 40);
}

@font-face {
    font-family: '7segment';
    src: url('fonts/seven-segment/Segment.woff') format('woff');
    src: url('fonts/seven-segment/Segment.ttf') format('ttf');
    
    font-weight: normal;
    font-style: normal;
    font-display: swap;
}
.container{
    margin-top: 75px;
    position: relative;
    max-width: 100vh;
    width: 350px;
    height: 520px;
    border-radius: 12px;
    padding: 20px 20px 20px;
    background: rgb(43, 40, 40);

}
.watermark{
    text-align: right;
    font-family: georgia;
    color: rgb(229, 255, 0);
    display: inline-block;
    
}

.input{
    height: 80px;
    width: 100%;
    outline: none;
    border: dashed;
    border-color: rgb(126, 150, 85);
    border-radius: 5px;
    border-width: 1px;
    text-align: right;
    padding-right: 15px;
    background-color: #384d40;
    margin-bottom: 4px;
    font-size: 35px;
    color: #00ff22;
    font-family: '7segment';
}
.input2{
     height: 70px;
    width: 190px;
    outline: none;
     border: dashed;
    border-color: rgb(126, 150, 85);
    border-radius: 5px;
    border-width: 1px;
    text-align: right;
    padding-right: 15px;
    background-color: #384d40;
    margin-bottom: 10px;
    font-size: 35px;
     font-family: '7segment';
    color: #00ff22;
    
}
.button{
    display: grid;
    grid-gap: 10px;
    grid-template-columns: repeat(4, 1fr);
}
button{
    width: 100%;
    height: 50px;
    border-radius: 10px;
    border: none;
    cursor: pointer;
    font-size: 28px;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: rgb(80, 78, 78);
    color: white;
    box-shadow: 1px 1.5px 1.5px rgb(185, 17, 17);
}
.button button:active{
    transform: scale(0.99);
}
.operator{
    color: rgb(0, 223, 253);
}
.ac,
.del{
    color: rgb(255, 112, 46);
    
}
.operator1{
    width: 80px;
    height: 50px;
    border-radius: 10px;
    margin-left: 24px;
    border: none;
    cursor: pointer;
    font-size: 20px;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color:  rgb(255, 0, 179);
     box-shadow: 1px 1.5px 1.5px rgb(255, 239, 8);
     font-weight: bold;

}
.btn-div {
    margin-left: 100px;
    
}
#toggleBtn {
    width: 27px;
    height: 25px;
    box-shadow: none;
    background-color:rgb(235, 19, 19);
    border-radius: 20px;
    font-size: 21px;
    font-family: cursive;
}
.messageBox {
    background-color: rgba(144, 240, 35, 0.88); 
    position: absolute; 
    top: 43px;
    left: 20px;
    right: 20px;
    height: auto;
    min-height: 150px;
    z-index: 100;
    border-radius: 8px;
    padding: 15px;
    padding-top: 10px;
    color: rgb(0, 0, 0);
    font-family: 'Segoe UI', sans-serif;
    box-shadow: 0 10px 20px rgba(0,0,0,0.5);
}

#closeBtn {
    margin-top: 15px;
    width: 80px;
    height: 30px;
    font-size: 23px;
    background-color: rgb(241, 36, 36);
    color: rgb(255, 255, 255);
    margin-left: 100px;
    box-shadow: 1px 1px 5px rgb(241, 36, 36);
}
.hidden {
    display: none;
}