@import url('https://fonts.googleapis.com/css2?family=Poppins:ital,wght@0,100;0,200;0,300;0,400;0,500;0,600;0,700;0,800;0,900;1,100;1,200;1,300;1,400;1,500;1,600;1,700;1,800;1,900&display=swap');

* {
    margin: 0;
    padding: 0;
    font-family: "Poppins", sans-serif;
    font-weight: 400;
    box-sizing: border-box;
}

html, body {
    height: 100%;
    margin: 0;
    padding: 0;
    font-family: -apple-system, BlinkMacSystemFont, sans-serif;
    overflow: auto;
    background: linear-gradient(315deg, rgba(101, 0, 94, 1) 3%, rgba(60, 132, 206, 1) 38%, rgba(48, 238, 226, 1) 68%, rgba(255, 25, 25, 1) 98%);
    animation: gradient 15s ease infinite;
    background-size: 400% 400%;
    background-attachment: fixed;
}

@keyframes gradient {
    0% {
        background-position: 0% 0%;
    }

    50% {
        background-position: 100% 100%;
    }

    100% {
        background-position: 0% 0%;
    }
}

.container {
    width: 100%;
    height: 100vh; /* Use vh instead of dvh for compatibility */
    display: flex;
    align-items: center;
    justify-content: center;
}

.calc {
    padding: 20px;
    border-radius: 10px;
    background-color: #3a4452;
    color: white;
    display: flex;
    flex-direction: column;
    gap: 20px;
    align-items: center;
    justify-content: center;
}

.display {
    height: 50px;
    width: 250px;
    border-radius: 10px;
    margin: 10px 0 0 0;
    background: #ffffff;
    color: black;
}

.display {
    font-size: 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 5px;
}

form {
    display: flex;
    gap: 30px;
    margin: 20px 0;
}

form input {
    border-radius: 10px;
    height: 30px;
    width: 150px;
    margin: 5px 5px;
    padding: 5px;
    cursor: pointer;
    font-size: 20px;
}

button {
    height: 50px;
    width: 150px;
    border: 0;
    margin: 10px;
    box-shadow: -8px -8px 15px rgba(255, 255, 255, 0.1), 5px 5px 15px rgba(0, 0, 0, 0.2);
    color: white;
    cursor: pointer;
    background: transparent;
}