* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: sans-serif;
}

.overlay {
    width: 100%;
    height: 100%;
    position: fixed;
    top: 0;
    left: 0;
    background-color: rgba(0, 0, 0, 0.5);
    display: none;
    justify-content: center;
    align-items: flex-start;
}

.overlay.show {
    display: flex;
}

.modal-box {
    width: 400px;
    height: 100px;
    background-color: white;
    border: 1px solid black;
    border-radius: 1em;
    padding: 1.5em;
    display: flex;
    flex-direction: column;
    gap: 1em;
    position: relative;
    top: 10px;
}

.modal-close-btn {
    background: none;
    border: none;
    font-size: 1.5em;
    cursor: pointer;

    position: absolute;
    top: 0.25em;
    right: 0.75em;
}

.modal-box h1 {
    font-size: 2em;
    height: 100%;
    font-weight: normal;
    display: flex;
    flex-direction: row;
    justify-content: flex-start;
    align-items: center;
}

#openBtn {
    font-size: 1.25em;
    padding: 0.5em 2em;
    border: 1px solid black;
    border-radius: 1em;

    position: absolute;
    bottom: 2em;
    left: 50%;
    transform: translateX(-50%);

    cursor: pointer;
}