body {
    font-family: 'Segoe UI', Arial, sans-serif;
    background: #121212;
    margin: 0;
    padding: 40px 20px;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    min-height: 100vh;
    color: #ecf0f1;
}

.container {
    background-color: #1e1e2f;
    width: 100%;
    max-width: 480px;
    padding: 35px 30px 40px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.4);
    border-radius: 14px;
    border-top: 6px solid #45a29e;
    box-sizing: border-box;
}

h1 {
    text-align: center;
    color: #ffffff;
    font-size: 26px;
    margin-bottom: 25px;
    letter-spacing: 1px;
}

#questions {
    font-size: 18px;
    margin-bottom: 20px;
    color: #f1f1f1;
    font-weight: 500;
    min-height: 60px;
}

#options {
    list-style-type: none;
    padding: 0;
    margin-bottom: 25px;
}

#options li {
    padding: 14px 16px;
    margin-bottom: 12px;
    border: 2px solid #2d2d3f;
    border-radius: 8px;
    cursor: pointer;
    background-color: #2c2c3c;
    transition: all 0.2s ease;
    font-size: 16px;
    font-weight: 500;
    color: #ecf0f1;
    user-select: none;
}

#options li:hover {
    background-color: #374151;
    border-color: #45a29e;
    transform: translateY(-2px);
}

button {
    width: 100%;
    background-color: #45a29e;
    color: white;
    border: none;
    padding: 14px 0;
    font-size: 18px;
    font-weight: bold;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.3s ease, transform 0.2s ease;
    user-select: none;
}

#buttondis:disabled {
    background-color: #bdbdbd;
    color: #888;
    cursor: not-allowed;
    opacity: 0.6;
}

button:hover {
    background-color: #37968f;
    transform: scale(1.03);
}

button:active {
    transform: scale(0.97);
}

#score {
    text-align: center;
    font-size: 20px;
    font-weight: bold;
    color: #f1f1f1;
    margin-top: 18px;
}

.correct {
    background-color: #27ae60 !important;
    color: white !important;
    border-color: #1e8449 !important;
}

.incorrect {
    background-color: #e74c3c !important;
    color: white !important;
    border-color: #c0392b !important;
}

#attempts {
    text-align: center;
    font-size: 16px;
    font-weight: 600;
    color: #81ecec;
    margin-top: 12px;
    margin-bottom: 20px;
    letter-spacing: 0.5px;
    user-select: none;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

@media (max-width: 480px) {
    body {
        padding: 30px 10px;
    }
    .container {
        padding: 25px 20px 30px;
        max-width: 100%;
    }
    h1 {
        font-size: 22px;
    }
    #questions {
        font-size: 16px;
        min-height: 55px;
    }
    #options li {
        padding: 12px 14px;
        font-size: 15px;
    }
    button {
        font-size: 16px;
        padding: 12px 0;
    }
    #score {
        font-size: 18px;
    }
    #attempts {
        font-size: 14px;
        margin-top: 10px;
        margin-bottom: 18px;
    }
}

#restartBtn {
    width: 100%;
    background-color: #45a29e;
    color: white;
    border: none;
    padding: 14px 0;
    font-size: 18px;
    font-weight: bold;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.3s ease, transform 0.2s ease;
    user-select: none;
    margin-top: 20px;
}

#restartBtn:hover {
    background-color: #37968f;
    transform: scale(1.03);
}

#restartBtn:active {
    transform: scale(0.97);
}

#restartBtn:disabled {
    background-color: #bdbdbd;
    color: #888;
    cursor: not-allowed;
    opacity: 0.6;
}