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

:root {
    --main-color: #854dff;
    --invalid-color: #ff5757;
    --main-section-color: #ffffff;
    --color: #f0f0f0;
    --background-color: #dbdbdb;
    --second-color: #716f6f;
    --black-color: #000000;
    --inputs-font-size: 45px;
}

body {
    font-family: "Poppins", sans-serif;
    background-color: var(--background-color);
    width: 100vw;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

main {
    background-color: var(--main-section-color);
    width: 300px;
    padding: 20px;
    border-radius: 15px 15px 100px;
}

form {
    display: flex;
    justify-content: space-between;
    border-bottom: 1px solid var(--background-color);
    padding-bottom: 30px;
    margin-bottom: 35px;
    position: relative;
}

form > div {
    display: flex;
    flex-direction: column;
    max-width: 80px;
}



form > div label {
    font-size: 9px;
    font-weight: 700;
    letter-spacing: 1.5px;
    color: var(--second-color);
    margin-bottom: 5px;
    text-transform: uppercase;
}

form > div label.invalid {
    color: var(--invalid-color);
}

form > div input {
    display: inline-block;
    padding: 8px 8px 6px;
    margin-bottom: 5px;
    border-radius: 5px;
    color: var(--black-color);
    font-size: 18px;
    font-weight: 800;
    border: 1px solid var(--background-color);
    caret-color: var(--main-color);
    letter-spacing: 1.4px;
    cursor: pointer;
}

input::-webkit-outer-spin-button,
input::-webkit-inner-spin-button {
    appearance: none;
    -webkit-appearance: none;
}

form > div input.invalid {
    border-color: var(--invalid-color);
    color: var(--invalid-color);
}

form > div input::placeholder {
    font-size: 18px;
    font-weight: 800;
}

form > div input:focus {
    /* outline: 1px solid var(--main-color); */
    outline: none;
    border: 1px solid var(--main-color);
}

form > div span {
    font-size: 4px;
    color: var(--invalid-color);
    /* display: none; */
}

form button {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--main-color);
    padding: 10px;
    border: none;
    position: absolute;
    bottom: -20px;
    right: 50%;
    transform: translateX(50%);
    cursor: pointer;
    transition: background-color 0.3s;
}

form button:hover {
    background-color: var(--black-color);
}

form button img {
    display: inline-block;
    width: 18px;
}

.result {
    font-size: 40px;
    font-weight: 800;
}

.result .target {
    display: inline-block;
    color: var(--main-color);
    width: 60px;
    text-align: center;
}

.result div {
    line-height: 45px;
}


@media (min-width: 600px) {
    main {
        width: 400px;
    }
    form {
        justify-content: flex-start;
        gap: 10px;
    }

    form > div {
        max-width: 90px;
    }

    form > div span {
        font-size: 8px;
    }

    form button {
        right: 0;
        transform: translateX(0);
    }

    .result {
        font-size: 50px;
    }

    .result div {
        line-height: 55px;
    }
}

/* Validation Styling */

div label.invalid {
    color: var(--invalid-color);
}