body {
    font-family: Arial, sans-serif;
    background-color: #f5f5f5;
    margin: 0;
    padding: 0;
    text-align: center;
}

.container {
    max-width: 1200px; 
    margin: 0 auto;
    padding: 20px;
    background-color: #fff;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

header {
    padding: 20px;
    background-color: #4CAF50;
    color: white;
}

h1 {
    margin: 0;
}

p {
    margin-top: 10px;
    font-size: 18px;
}

.button-container {
    margin-top: 20px;
}

.btn {
    display: inline-block;
    padding: 10px 20px;
    margin: 5px;
    background-color: white; 
    color: #d9534f; 
    text-decoration: none;
    border: 2px solid #d9534f;
    border-radius: 5px;
    font-size: 16px;
    transition: all 0.3s ease;
}

.btn:hover {
    background-color: #d9534f;
    color: white;
    border: 2px solid #d9534f;
}

.abstract-section {
    margin-top: 40px;
    padding: 20px;
    background-color: #f5f5f5; 
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1); 
}

.abstract-section h2 {
    font-size: 24px;
    color: #333;
    margin-bottom: 20px;
}

.abstract-section p {
    font-size: 16px;
    line-height: 1.6;
    color: #555;
}


.audio-section {
    margin-top: 20px;
}

.audio-container {
    display: flex;
    justify-content: space-between;
    gap: 20px;
    margin-bottom: 30px;
    flex-wrap: wrap;
}

.audio-item {
    flex: 1 1 23%;
    box-sizing: border-box;
}

audio {
    width: 100%;
}

footer {
    margin-top: 50px;
    font-size: 14px;
    color: #888;
}