/* General Styles */
body {
    font-family: "Comic Sans MS", sans-serif;
    background-image: linear-gradient(120deg, #a1c4fd 0%, #c2e9fb 100%);
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
}

.app-container {
    text-align: center;
    background-color: #fff;
    padding: 20px;
    border-radius: 15px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
    width: 90%;
    max-width: 1200px;
    height: auto;
    min-height: 70vh;
    position: relative;
    box-sizing: border-box;
}

h1 {
    color: #ff6f61;
    font-size: 3rem;
    margin: 10px 0;
}

.math-problem {
    margin-top: 20px;
    margin-bottom: 20px;
}

#problem {
    font-size: 8rem;
    color: #333;
    margin: 20px 0;
    font-weight: 700;
}

.options {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 20px;
    margin-top: 20px;
}

.option {
    font-size: 4rem;
    padding: 10px 40px;
    border: none;
    border-radius: 10px;
    background-color: #4caf50;
    color: white;
    cursor: pointer;
    transition: background-color 0.3s ease;
    flex: 1 1 40%;
    max-width: 200px;
}

.option:hover {
    background-color: #45a049;
}

#feedback {
    font-size: 2rem;
    margin-top: 20px;
    color: #ff6f61;
}

#next-button {
    font-size: 1.5rem;
    padding: 10px 20px;
    border: none;
    border-radius: 10px;
    background-color: #ff6f61;
    color: white;
    cursor: pointer;
    transition: background-color 0.3s ease;
    position: absolute;
    left: 50%;
    bottom: 20px;
    transform: translateX(-50%);
}

#next-button:hover {
    background-color: #ff4a3d;
}

/* Responsive Adjustments */
@media (max-width: 768px) {
    h1 {
        font-size: 2.5rem;
    }

    #problem {
        font-size: 6rem;
    }

    .option {
        font-size: 3rem;
        padding: 10px 20px;
        max-width: 150px;
    }

    #feedback {
        font-size: 1.5rem;
    }

    #next-button {
        font-size: 1.3rem;
        padding: 8px 16px;
    }
}

@media (max-width: 480px) {
    h1 {
        font-size: 2rem;
    }

    #problem {
        font-size: 4.5rem;
    }

    .option {
        font-size: 2.5rem;
        padding: 8px 16px;
        max-width: 120px;
    }

    #feedback {
        font-size: 1.2rem;
    }

    #next-button {
        font-size: 1rem;
        padding: 6px 12px;
    }
}