*{
    margin: 0;
    font-family: sans-serif;
    box-sizing: border-box;
}

body{
    background-color: #ccc;
    color: #c0c0a0;
    width: 100%;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

.container{
    width: 300px;
    height: 425px;
    font-size: 24px;
    padding: 20px;
    background-color: #2d2d2d;
    border: 3px solid #3a3f2d;
    border-radius: 8px;
    box-shadow: 5px 5px 15px rgba(0,0,0,0.5);
}
p{
    font-size: 14px;
}

 input{
    width: 100%;
    height: 70px;
    text-align: right;
    color: #000;
    padding: 5px;
    font-weight: 600;
    font-size: 30px;
    background-color: hsl(90, 15%, 59%);
    overflow-y: auto;
}
.buttons{
    width: 100%;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
    margin-top: 20px;
}

.operators{
    background-color: hsl(0, 0%, 25%);
    color: #ccc;
}
.operators:hover{
    background-color: hsl(0, 0%, 40%);
    color: #ccc;
}
.operators:active{
    background-color: hsl(0, 0%, 25%);
    color: #ccc;
}

.clear{
    background-color: hsl(0, 70%, 50%);
    color: #ccc;
}
.clear:hover{
    background-color: hsl(0, 100%, 50%);
    color: #ccc;
}
.clear:active{
    background-color: hsl(0, 70%, 50%);
    color: #ccc;
}

.equal{
    background-color: hsl(100, 39%, 42%);
    color: #ccc;
}
.equal:hover{
    background-color: hsl(100, 70%, 45%);
    color: #ccc;
}
.equal:active{
    background-color: hsl(100, 50%, 40%);
    color: #ccc;
}
button{
    padding: 10px;
    border-radius: 10px;
    outline: none;
    border: none;
    font-size: 20px;
    box-shadow: 2px 4px 10px rgba(0,0,0,0.5);
    background-color: #ccc;
    cursor: pointer;
}

button:hover{
    background-color: #fff;
}
button:active{
    background-color: #ffffffd0;
}