html {
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0;
}

body {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0;
    background-image: linear-gradient(135deg, rgba(85, 85, 85, 1), rgba(0, 0, 0, 1));
}

h1, h2, h3, h4, h5, h6, p, a {
    margin: 0;
    padding: 0;
}

* {
    box-sizing: border-box;
    font-family: "Yu Gothic UI", sans-serif;
}

section {
    background-color: #ffffff;
    max-width: 624px;
    width: 100%;
    height: 350px;
    margin: 10px;
    padding: 16px;
    border-radius: 20px;
    justify-content: center;
    align-items: center;
    display: none;
}

section h1 {
    font-size: 36px;
}

button {
    background-color: #000000;
    color: #ffffff;
    outline: none;
    border: #000000 2px solid;
    font-size: 24px;
    padding: 4px 24px;
    border-radius: 6px;
    text-align: center;
    transition: .3s ease all;
    cursor: pointer;
    font-weight: 700;
}

button:hover {
    background-color: #ffffff;
    color: #000000;
}

.main {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
}

.home h1 {
    margin-bottom: 10px;
}

.question h1 {
    font-size: 28px;
}

.box {
    margin: 10px 0;
    text-align: center;
}

.box p {
    display: inline-block;
    font-size: 30px;
    margin-bottom: 5px;
}

.box div {
    width: 180px;
    height: 42px;
    margin-bottom: 5px;
    position: relative;
    display: inline-block;
}

.box input {
    font-size: 30px;
    position: relative;
    width: 100%;
    height: 100%;
    text-align: center;
    border-radius: 6px;
    border: #000000 1px solid;
    outline: none;
}

.box img {
    position: absolute;
    top: 0;
    right: 0;
    height: 100%;
    padding: 4px;
    display: none;
}

.next {
    display: none;
}

.answer, .result {
    display: none;
    margin-bottom: 10px;
}