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

html, body {
    width: 100%;
    height: 100%;
    background-color: #b3a4ee;
    font-family: Arial, Helvetica, sans-serif;
    overflow: hidden;
}

.main {
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
}

.calculator {
    border: 2px solid #522789;
    border-radius: 8px;
    overflow: hidden; 
}

.circles {
    display: flex;
    background-color: #482773;
    padding: 10px;
    gap: 5px;
}

.red, .yellow, .green {
    border-radius: 50%;
    width: 18px;
    height: 18px;
}

.red {
    background-color: #EC695E;
}

.yellow {
    background-color: #F4BA51;
}

.green {
    background-color: #60C255;
}

#display {
    max-width: 350px;
    background-color: #482773;
    padding-right: 20px;
    color: white;
    font-size: 2.5rem;
    min-width: 100px; 
    min-height: 60px; 
    text-align: right;
}

.history {
    background-color: #482773;
    color: #999;
    font-size: 1.2rem;
    text-align: right;
    padding: 10px 20px;
    margin: 0;
}

.buttons {
    width: 350px;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    grid-template-rows: repeat(4, 1fr);
    background-color: #45386C;
}

.buttons button {
    width: 100%;
    height: 70px;
    border: 1px solid #45386C; 
    outline: none;
    font-size: 2rem;
    color: white;
    border-radius: 2px; 
}

.dark {
    background-color: #553F80;
}

.symbol {
    background-color: #FFA501;
}

.number {
    background-color: #695F8F;
}

.zero {
    grid-column: span 2;
}

.footer{
    width: 100%;
    position: absolute;
    background-color: #8d6fe3;
    padding: 15px;
    text-align: center;
    bottom: 0;
}

.footer__text{
    color: #f6f5fd;
    font-size: 1rem;
}

.footer__link{
    color: #eeecfb;
    text-decoration: none;
    font-weight: bold;
    transition: all 0.3s ease-in-out;
}

.footer__link:hover{
    color: #c6bef4;
}