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

body {
    height: 100vh;
    overflow: hidden;
    background-image: url(./img/fundo.png);
    background-size: cover;          /* Faz a imagem cobrir a tela toda */
    background-position: center;     /* Centraliza a imagem */
    background-repeat: no-repeat;    /* Impede que a imagem se repita */
    background-attachment: fixed;    /* Deixa o fundo fixo ao rolar */
    color: rgb(186, 186, 186);
}

/* ESCONDE O JOGO NO MENU */
#des {
    display: none;
    margin: auto;
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
}

/* TELAS */
.tela {
    display: none;
}

.tela.ativa {
    display: flex;
}

/* MENU / TELAS */
#menu, #instrucoes, #sobre {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;

    justify-content: center;
    align-items: center;
    flex-direction: column;

    z-index: 999;
    color: white;
}

/* FUNDO DO MENU */
#menu {
    background-image: url(./img/fundo.png);
    background-size: cover;
}

/* (opcional) fundo das outras telas */
#instrucoes {
    background: #111;
}

#sobre {
   background: #111;
}

button {
    padding: 18px 36px;
    margin: 8px;
    font-size: 22px;
    font-weight: bold;
    cursor: pointer;
    border: none;
    border-radius: 14px;
    background: linear-gradient(145deg, #b31212, #7a0c0c);   /* Gradiente mais bonito */
    color: #fff;
    box-shadow: 0 6px 0 #4d0707, 0 10px 20px rgba(0,0,0,0.4);  /* Sombra pra dar efeito 3D */
    transition: all 0.2s ease-in-out;
}
/* Hover (quando passa o mouse) */
button:hover {
    background: linear-gradient(145deg, #d61a1a, #8f1111);
    transform: translateY(-2px);
    box-shadow: 0 8px 0 #4d0707, 0 12px 25px rgba(0,0,0,0.5);
}
/* Clique (efeito de apertar) */
button:active {
    transform: translateY(4px);
    box-shadow: 0 2px 0 #4d0707, 0 5px 10px rgba(0,0,0,0.3);
}