* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: sans-serif;
    outline: none;
}

body {
    background: linear-gradient(45deg,hsl(0, 46.70%, 94.10%),hsl(13, 19.10%, 81.60%),hsl(318, 26.20%, 87.30%),hsl(218, 45.80%, 88.40%));
    background-size: 400% 400%;
    animation: gradientBG 15s ease infinite;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

@keyframes gradientBG {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}

.container {
    width: 100%;
    max-width: 320px;
    padding:5px;
    background:hsla(0, 0.00%, 100.00%, 0.34);
    border-radius: 10px;
    box-shadow: 0 4px 30px hsla(0, 1.70%, 22.70%, 0.10);
    backdrop-filter: blur(10px);
}

.calculator {
    background-color: #f0e9e9;
    padding: 15px;
    border-radius: 20px;
    box-shadow: 10px 10px 20px hsla(0, 1.20%, 16.30%, 0.10), -10px -10px 20px rgba(255, 255, 255, 0.5);
}

input {
    grid-column: span 4;
    height: 70px;
    width: 260px;
    background-color: #ecf0f3;
    box-shadow: inset -5px -5px 12px #ffffff, -5px -5px 12px rgba(0, 0, 0, .16);
    border: none;
    border-radius: 30px;
    color: rgba(70, 70, 70);
    font-size: 50px;
    text-align: end;
    margin: auto;
    margin-top: 40px;
    margin-bottom: 30px;
    padding: 20px;
}

#outputscreen {
    width: 100%;
    height: 80px;
    background-color: #ecf0f3;
    border: none;
    border-radius: 10px;
    box-shadow: inset 5px 5px 10px #cbced1, inset -5px -5px 10px #ffffff;
    font-size: 32px;
    text-align: right;
    padding: 10px;
    margin-bottom: 20px;
    color: #333;
}

.buttons {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
}

button {
    background-color: #ecf0f3;
    border: none;
    border-radius: 50%;
    height: 60px;
    font-size: 20px;
    box-shadow: 5px 5px 10px #cbced1, -5px -5px 10px #ffffff;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.2s;
}

button:hover {
    background-color: #d1d9e6;
    transform: scale(1.05);
}

button:active {
    transform: scale(0.95);
}

button[onclick*="('('"], button[onclick*="')'"] {
    background-color: #f0f0f0;
    color: #333;
}

button[onclick*="('('"]:hover, button[onclick*="')'"]:hover {
    background-color: #d1d9e6;
}

.equal {
    grid-column: span 4;
    border-radius: 30px;
    background-color: rgb(71, 72, 75);
    color: white;
    box-shadow: 5px 5px 10px #cbced1, -5px -5px 10px #ffffff;
}

.equal:hover {
    background-color: rgb(168, 117, 151);
}

@media (max-width: 480px) {
    .container {
        padding: 10px;
    }

    .calculator {
        padding: 15px;
    }

    button {
        height: 50px;
        font-size: 18px;
    }

    #outputscreen {
        height: 60px;
        font-size: 28px;
    }
}