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

body {
    background: linear-gradient(95deg, #ea73ff, #fff);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.app {
    width: 90%;
    max-width: 600px;
    padding: 30px;
    background: linear-gradient(145deg, #fff, #f0a1d4);
    border-radius: 15px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    text-align: center;
}

h1 {
    font-size: 28px;
    color: #001e4d;
    margin-bottom: 25px;
    font-weight: 700;
}

.quiz-card {
    background: #fff;
    padding: 25px;
    border-radius: 12px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
    margin-bottom: 20px;
}

#question {
    font-size: 20px;
    color: #001e4d;
    margin-bottom: 20px;
}

.answer-buttons {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.btn {
    background: #fff;
    color: #222;
    font-weight: 500;
    border: 1px solid #222;
    padding: 12px;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: left;
}

.btn:hover:not([disabled]) {
    background: #222;
    color: #fff;
}

.btn:disabled {
    cursor: not-allowed;
}

.correct {
    background: #9aeabc !important;
    border-color: #34a853 !important;
    color: #000;
}

.incorrect {
    background: #ff9393 !important;
    border-color: #d93025 !important;
    color: #000;
}

#next-btn {
    display: none;
    margin-top: 15px;
    padding: 12px 25px;
    background: #4e91fd;
    color: #fff;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: 0.3s;
}

#next-btn:hover {
    background: #357ae8;
}

@media screen and (max-width: 480px) {
    .app {
        padding: 20px;
    }

    h1 {
        font-size: 24px;
    }

    #question {
        font-size: 18px;
    }

    .btn {
        padding: 10px;
        font-size: 14px;
    }

    #next-btn {
        padding: 10px 20px;
    }
}