*{
    margin: 0;
    padding: 0;
    font-family: "Monaco", monospace;
    box-sizing: border-box;
}

body{
    background: #778899;
}

.app{
    background: #708090;
    border: 1px solid #000000;
    width: 90%;
    max-width: 500px;
    margin: 100px auto 0;
    padding: 30px;
    border-radius: 10px;
}

.app h1{
    font-size: 25px;
    color: #1C1C1C;
    font-weight: 600;
    border-bottom: 1px solid #000000;
    padding-bottom: 30px;
    margin-bottom: 20px;
    text-align: center;
}

.inicio{
    padding: 20px 0;
}

.tela-quiz{
    padding: 20px 0;
}

.tela-quiz h2{
    font-size: 18px;
    color: #1C1C1C;
    font-weight: 600;
    text-align: center;
    margin-bottom: 20px;
}

#answer-buttons{
    display: grid; /* Organização dos botões em grade */
    grid-template-columns: 1fr; /* Uma coluna; ocupação do espaço todo */
    gap: 10px; /* Espaço entre os botões */
    margin-bottom: 20px;
}

.btn{
    background: #A9A9A9;
    color: #000000;
    font-weight: 500;
    width: 100%;
    border: 1px solid #000000;
    padding: 12px;
    margin: 15px 0;
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.3s;
    align-items: center;
}

.btn:hover:not([disabled]){
    background: #778899;
    color: #FFFFFF;
}

.btn:disabled{
    cursor: no-drop;
    opacity: 0.5;
}

.btn.correct{
    background: #4CAF50;
    color: #FFFFFF;
}

.btn.incorrect{
    background: #F44336;
    color: #FFFFFF;
}

#next-btn{
    display: none;
    margin-top: 20px;
}