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

html {
    font-size: 10px;
}

body {
    background-color: lightskyblue;
}

p {
    font-size: 1.6rem;
    line-height: 1.5;
}

img {
    width: 100%;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

.quiz-box {
    width: 600px;
    margin: 0 auto;
    background-color: lightgoldenrodyellow;
    padding: 10px 50px 50px 50px;
    border: 3px solid black;
    border-radius: 5px;

}

.quiz-box h1 {
    background-color: yellow;
    font-size: 4rem;
    text-align: center;
    padding: 10px 0;
    width: 100%;
    margin-bottom: 2rem;
    border-radius: 3px;
}

.quiz-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.quiz-header #progress {
    color: red;
    font-size: 1.6rem;
    font-weight: 700;
}

.quiz-header #count-down {
    font-size: 1.6rem;
    font-weight: 700;
    background-color: orangered;
    padding: 5px;
    margin: 1px;
    color: #fff;
    border-radius: 5px;
}

.quiz-box #question {
    font-size: 1.8rem;
    font-weight: 600;
    color: orangered;
    border: 1px solid red;
    border-width: 1px 0;
    padding: 5px 0;
}

.buttons {
    margin: 1.5rem 0 4rem 0;
}

.btn {
    text-align: left;
    background-color: lightgrey;
    width: 100%;
    font-size: 1.8rem;
    color: black;
    border-radius: 5px;
    margin: 7px 0;
    padding: 1rem;
    outline: none;
}

.btn:hover {
    cursor: pointer;
    background-color: dodgerblue;
    color: #fff;
}

.btn:active {
    background-color: darkgreen;
}

#score {
    color: black;
    text-align: center;
    font-size: 2rem;
    margin-bottom: 4rem;
}

.quiz-repeat {
    text-align: center;
    margin: 0 auto;
}

.quiz-repeat a {
    font-size: 1.6rem;
    font-weight: 600;
    color: #fff;
    text-decoration: none;
    background-color: orangered;
    padding: 1rem;
    border-radius: 5px;
    transition: all .3s;
}