/* General Styles */
body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f9f9fc;
    color: #333;
    margin-top: 100px;
}

/* Header Styling */
.hero {
    text-align: center;
    padding: 20px;
}

.hero h1 {
    margin: 0;
    font-size: 2rem;
}

/* Papers Section */
.papers-section {
    max-width: 1000px;
    margin: 40px auto;
    padding: 0 20px;
}

.papers-container {
    display: block;
    flex-wrap: wrap;
    gap: 20px; /* Space between cards */
    justify-content: center; /* Center the items */
}

.papers-item {
    background-color: white;
    border: 1px solid #ddd;
    border-radius: 8px;
    padding: 15px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    text-align: left;
}

.papers-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.paper-title {
    font-size: 1.2rem;
    color: #333;
    margin-bottom: 10px;
    display: block;
}

.paper-detail {
    font-weight: bold;
    color: #555;
}

.paper-link {
    display: inline-block;
    margin-top: 10px;
    padding: 10px 15px;
    background-color: #6c5ce7;
    color: white;
    text-decoration: none;
    border-radius: 5px;
    font-size: 0.9rem;
    font-weight: bold;
    transition: background-color 0.3s ease;
}

.paper-link:hover {
    background-color: #4e3fb7;
}

/* Footer Section */
.footer {
    text-align: center;
    margin: 20px 0;
}

.btn-back-home {
    padding: 10px 20px;
    background-color: #ddd;
    color: #333;
    text-decoration: none;
    border-radius: 5px;
    font-size: 1rem;
    font-weight: bold;
    transition: background-color 0.3s ease;
}

.btn-back-home:hover {
    background-color: #bbb;
}