body {
    font-family: 'Raleway', sans-serif;
    box-sizing: border-box;
    background-color: #003300;
}

/** Header **/
.header {
    width: 100%;
    background-color: #1b5e20;
    height: 50px;
}

.header h2 {
    text-align: center;
    color: #FFFFFF;
    font-weight: bold;
    font-size: 24px;
    line-height: 50px;
}

/** Main Game **/
.game {
    padding: 50px 30px;
    position: relative;
    min-height: 560px;
    background-color: #FFFFFF;
}

.screen {
    display: none;
    visibility: hidden;
    min-height: 500px;
    width: 90%;
    margin: 0 auto;
    box-shadow: 0 3px 6px rgba(0,0,0,0.16), 0 3px 6px rgba(0,0,0,0.23);
    padding: 30px;
    position: relative;
    top: 50px;
}

.screen h2 {
    font-weight: bold;
    text-align: center;
    font-size: 26px;
}

.screen.intro-screen p{
    margin-top: 30px;
    font-size: 18px;
    text-align: center;
}

.button {
    display: inline-block;
    background-color: #1b5e20;
    color: #FFFFFF;
    padding: 10px 15px;
    transition: box-shadow .2s ease-out;
    font-weight: bold;
    cursor: pointer;
}

.button.continue {
    position: absolute;
    bottom: 40px;
    right: 40px;
}

.button:hover {
    box-shadow: 0 10px 20px rgba(0,0,0,0.19), 0 6px 6px rgba(0,0,0,0.23);
}

.answer-wrapper {
    display: flex;
    flex-direction: column;
    justify-content: center;
    margin: 40px 20% 10px 20%;
}

.answer-choice {
    margin-bottom: 30px;
    padding: 15px;
    text-align: center;
}

.timer-wrapper {
    margin: 0 20%;
    height: 70px;
}

.timer-label {
    font-weight: bold;
}

.timer-bar {
    margin-top: 10px;
    width: 100%;
    height: 55px;
}

.timer-fill {
    height: 100%;
    width: 100%;
    background-color: #1b5e20;
}

/** Footer **/
.footer {
    min-height: 150px;
    width: 100%;
    background-color: #003300;
}

.footer h1 {
    text-align: center;
    color: #FFFFFF;
    font-weight: bold;
    font-size: 30px;
    line-height: 150px;
}