body {
    font-family: Arial, sans-serif;
    background: url('images/background.jpg') no-repeat center center fixed;
    background-size: cover;
    margin: 0;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

.container {
    background-color: rgba(255, 255, 255, 1);
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.4);
    width: 90%;
    max-width: 600px;
    text-align: center;
}

h1 {
    color: #2e7d32;
    margin-bottom: 10px;
}

.intro-text {
    color: #333;
    margin-bottom: 20px;
    font-size: 1.2em;
}

.category-container {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 20px;
    margin-bottom: 20px;
}

.category-button {
    padding: 15px;
    font-size: 1em;
    cursor: pointer;
    border: none;
    border-radius: 10px;
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 15px;
    background: linear-gradient(135deg, #4a90e2, #357ab7);
    color: #ffffff;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.2);
    transition: transform 0.2s, box-shadow 0.2s;
}

.category-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 12px rgba(0, 0, 0, 0.3);
}

.category-button img {
    width: 40px;
    height: 40px;
}

.question-container {
    margin: 20px 0;
}

.question {
    font-size: 1.5em;
    font-weight: bold;
    margin-bottom: 15px;
    color: #333;
}

.options {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.option-button {
    padding: 15px;
    font-size: 1em;
    cursor: pointer;
    border: none;
    border-radius: 10px;
    background: linear-gradient(135deg, #f7b733, #fc4a1a);
    color: #ffffff;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.2);
    transition: transform 0.2s, box-shadow 0.2s;
}

.option-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 12px rgba(0, 0, 0, 0.3);
}

button {
    padding: 10px;
    font-size: 1em;
    cursor: pointer;
    border: none;
    border-radius: 5px;
}

button:hover {
    background-color: #e0e0e0;
}

.next-button {
    background-color: #2e7d32;
    color: #ffffff;
    margin-top: 20px;
    padding: 15px;
    border-radius: 10px;
    transition: background-color 0.3s;
}

.next-button:hover {
    background-color: #276b29;
}

.next-button:disabled {
    background-color: #9e9e9e;
    cursor: not-allowed;
}

.score {
    margin-top: 15px;
    font-size: 1.2em;
    color: #333;
}

.album-container {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 20px;
    background: #f9f9f9;
    padding: 20px;
    border-radius: 15px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.album-part {
    width: 100px;
    height: 100px;
    margin: 10px;
    display: inline-block;
    background-color: #ccc;
    border-radius: 10px;
    transition: background-color 0.5s ease, transform 0.3s;
    border: 2px dashed #999;
    cursor: pointer;
}

.album-part.unlocked {
    background-color: #4a90e2;
    border: 2px solid #4a90e2;
    transform: scale(1.05);
}

.album-img {
    width: 100%;
    height: 100%;
    border-radius: 10px;
}

.timer {
    margin-top: 15px;
    font-size: 1.2em;
    color: #d32f2f;
}

.progress-container {
    width: 100%;
    background-color: #e0e0e0;
    height: 20px;
    border-radius: 10px;
    margin-bottom: 15px;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    width: 0;
    background-color: #2e7d32;
    transition: width 0.5s ease;
}