body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    width: 100%;
    margin: 0;
    padding: 0;
    background-color: black;
    font-family: "Roboto";
}
.phone {
    position: relative;
    display: flex;
    justify-content: center;
}
.credits {
    position: absolute;
    z-index: 3;
    bottom: 30px;
    color: white;
    font-family: "Roboto";
    font-weight: 300;
    font-size: 18px;
}
.bar {
    background-color: #ffffff;
    position: absolute;
    bottom: 120px;
    left: 477px;
    color: #fff;
    height: 5px;
    width: 160px;
    z-index: 2;
    border-radius: 5px 5px 5px 5px;
}

.calc-container {
    display: flex;
    position: absolute;
    flex-direction: column;
    height: 610px;
    width: 416px;
    border-radius: 0px 0px 75px 75px;
    margin-top: 150px;
    z-index: 1;
}
.image {
    width: 1100px;
    height: auto;
    margin-right: 4px;
}
.placeholder-screen {
    display: flex;
    justify-content: flex-end;
    background-color: black;
    width: 100%;
    height: 150px;
}
.screen {
    display: flex;
    width: 90%;
    justify-content: flex-end;
    height: 100%;
    margin-right: 40px;
    margin-left: 22px;
    overflow: hidden;
}
h1 {
    font-size: 5.8rem;
    margin-top: 0px;
    margin-bottom: 0px;
    font-weight: 380;
    color: white;
}
.button-container {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100%;
    width: 100%;
    background-color: black;
    border-radius: 0 0 45px 44px;
}
.buttons-grid {
    display: grid;
    gap: 12px;
    grid-template-columns: 1fr 1fr 1fr 1fr; 
    grid-template-rows: 1fr 1fr 1fr 1fr 1fr;
    height: 90%;
    width: 90%;
    background-color: black;
}
.btn {
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 50%;
    color: white;
    background-color: #1C1C1C;
    font-size: 2.6rem;
    cursor: pointer;
    transition: background-color 0.3s ease, transform 0.3s ease;

}
.btn:hover {
    background-color: #757272;
    transform: scale(1.1);
}
.op-btn:hover {
    background-color: #f1bf78 ;
}
#other:hover {
    background-color: #e4e4e4;
}
.del {
    grid-column-start: 1;
    grid-row-start: 1;
    background-color: #a09c9c;
    color: black;
    font-size: 37px;
    font-weight: 400;
}
.negposi {
    grid-column-start: 2;
    grid-row-start: 1;
    background-color: #a09c9c;
    color: black;
}
.percent {
    grid-column-start: 3;
    grid-row-start: 1;
    background-color: #a09c9c;
    color: black;
}
.div {
    grid-column-start: 4;
    grid-row-start: 1;
    background-color: #FF9500;
}
.mult {
    grid-column-start: 4;
    grid-row-start: 2;
    background-color: #FF9500;
}
.sub {
    grid-column-start: 4;
    grid-row-start: 3;
    background-color: #FF9500;
}
.add {
    grid-column-start: 4;
    grid-row-start: 4;
    background-color: #FF9500;
}
.equal {
    background-color: #FF9500;
}
.zero {
    display: flex;
    justify-content: flex-start;
    padding-left: 32px;
    grid-column: span 2;
    border-radius: 45px 45px 45px 45px;
}
.toggle-btn {
    background-color: white;
    color: #FF9500;
}
.icons {
    top: 122px;
    left: 648px;
    height: 14px;
    filter: invert();
    position: absolute;
}