body {
    font-family: 'Helvetica Neue', Arial, sans-serif;
    background-color: #f7f9fc;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.wrapper {
    width: 90%;
    max-width: 1200px;
    padding: 20px;
}

h1 {
    text-align: center;
    color: #333;
    font-weight: 600;
    font-size: 2.5rem;
    margin-bottom: 30px;
}

.group-members {
    text-align: center;
    color: #333;
    font-weight: 600;
    font-size: 1.5rem;
    margin-bottom: 30px;
}

.card {
    background-color: #ffffff;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    padding: 20px;
    margin-bottom: 20px;
}

.input-section h2 {
    margin-top: 0;
    font-size: 1.5rem;
    color: #333;
    text-align: center;
}

input {
    display: block;
    width: calc(100% - 20px);
    padding: 10px;
    margin: 10px 0;
    border: 1px solid #ccc;
    border-radius: 8px;
    font-size: 1rem;
}

button {
    padding: 12px;
    width: 100%;
    border: none;
    border-radius: 8px;
    background-color: #007BFF;
    color: white;
    font-size: 1.1rem;
    cursor: pointer;
    margin-bottom: 10px;
    transition: background-color 0.3s ease, transform 0.3s ease;
}

button:hover {
    background-color: #0056b3;
    transform: translateY(-3px);
}

button:active {
    transform: translateY(0);
}

#graph-container {
    height: 600px;  /* Increased height */
    margin: 0 auto;
    background-color: #fafafa;
    border: 2px solid #ddd;
    border-radius: 10px;
}

#result-message, #mst-info, #shortest-path-info {
    padding: 15px;
    background-color: #e7f3fe;
    border: 1px solid #b6d4fe;
    border-radius: 10px;
    font-size: 1.1rem;
    color: #333;
}

.top-section {
    display: flex;
    justify-content: space-between;
    margin-bottom: 20px;
}

.input-section, .button-section {
    width: 48%;
}

.middle-section {
    display: flex;
    justify-content: space-between;
    margin-bottom: 20px;
}

.middle-section .card {
    flex: 1;
    margin: 10px;
}

@media (max-width: 768px) {
    .top-section, .middle-section {
        flex-direction: column;
    }

    .input-section, .button-section, .middle-section .card {
        width: 100%;
    }
}