* {
    margin: 0;
    padding: 0;
    font-family: "Poppins", sans-serif;
    box-sizing: border-box;
}

body {
    
    background: linear-gradient(135deg, #0D0D0D, #1A001A, #4B0082);
    background-size: 400% 400%;
    animation: backgroundAnim 20s ease infinite;
    min-height: 100vh;
    color: #fff;
}

@keyframes backgroundAnim {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.app {
    background: linear-gradient(145deg, #1A001A, #4B0082);
    width: 90%;
    max-width: 600px;
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 15px 30px rgba(0,0,0,0.5);
    text-align: center;
    margin: 50px auto 0 auto;
}

.app h1 {
    color: #E0B3FF;
    font-weight: 700;
    font-size: 32px;
    margin-bottom: 20px;
    text-shadow: 2px 2px 5px #000;
    border-bottom: 2px solid rgba(224, 179, 255, 0.5);
    padding-bottom: 15px;
}

#pergunta {
    font-size: 20px;
    color: #D1B3FF;
    font-weight: 600;
    margin: 25px 0;
    text-shadow: 1px 1px 3px #000;
}

.btn {
    background: linear-gradient(90deg, #6A0DAD, #8E2DE2);
    color: #fff;
    font-weight: 600;
    width: 100%;
    border: none;
    padding: 15px;
    margin: 12px 0;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.4s ease;
    box-shadow: 0 5px 15px rgba(0,0,0,0.3);
    font-size: 16px;
}

.btn:hover:not([disabled]) {
    background: linear-gradient(90deg, #8E2DE2, #6A0DAD);
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.4);
}

.btn:disabled {
    cursor: no-drop;
    opacity: 0.6;
}

#btn-proximo {
    background: linear-gradient(90deg, #6A0DAD, #8E2DE2);
    color: #FFFFFF;
    font-weight: 700;
    width: 180px;
    border: 0;
    padding: 15px;
    margin: 25px auto 0;
    display: block;
    border-radius: 12px;
    cursor: pointer;
    box-shadow: 0 5px 15px rgba(0,0,0,0.3);
    font-size: 16px;
    display: none;
    transition: all 0.4s ease;
}

#btn-proximo:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.4);
}

.correct {
    background: linear-gradient(90deg, #16A34A, #22C55E) !important;
    color: #FFFFFF;
    box-shadow: 0 5px 15px rgba(0,0,0,0.4);
}

.incorret {
    background: linear-gradient(90deg, #DC2626, #EF5350) !important;
    color: #FFFFFF;
    box-shadow: 0 5px 15px rgba(0,0,0,0.4);
}