body {
    margin: 0px;
    padding: 0px;
    font-family: Arial, Helvetica, sans-serif;
}
.container {
    width: 100%;
    min-height: 100vh;
    background: linear-gradient(135deg, #4203a9, #90bafc);
    color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
}
.title {
    font-size: 60px;
    margin: 0px;
}
.title span {
    color: #ffff76;
}
.calculator {
    width: 90%;
    max-width: 600px;
}
.input-box {
    margin: 40px 0px;
    padding: 35px;
    background: #ffffff4d;
    display: flex;
    align-items: center;
    gap: 1.5rem;
    border-radius: 10px;
}
.input-box input {
    flex: 1;
    height: 55px;
    position: relative;
    padding: 0px 20px;
    font-size: 18px;
    font-weight: 600;
    border: 0px;
    border-radius: 5px;
    outline: 0px;
    cursor: pointer;
}
.input-box button {
    height: 55px;
    background: #ffff76;
    color: #000000;
    padding: 0px 20px;
    font-size: 18px;
    font-weight: 600;
    border: 0px;
    border-radius: 5px;
    outline: 0px;
    cursor: pointer;
}
.input-box button:hover {
    opacity: 0.7;
}
.input-box input::-webkit-calendar-picker-indicator {
    height: 20px;
    width: 20px;
    border: 1px solid lightgray;
    border-radius: 25%;
    cursor: pointer;
}
#result p {
    background: #00ff0d2f;
    color: #ffffff;
    font-weight: 600;
    margin: 0px;
    padding: 20px;
    border: 1px solid green;
    border-radius: 7px;
}
#error p {
    background: #ff00002f;
    color: #ffffff;
    font-weight: 600;
    margin: 0px;
    padding: 20px;
    border: 1px solid red;
    border-radius: 7px;
}
@media screen and (max-width: 685px) {
    .title {
        font-size: 40px;
    }
    .input-box {
        display: grid;
        grid-template-columns: repeat(1, 1fr);
    }
}