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

.container {
    max-width: 100%;
    margin: 0 auto;
    padding: 20px;
    box-sizing: border-box;
}

h1 {
    text-align: center;
    color: #333;
}

.navigation {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    margin-bottom: 20px;
}

.date-display {
    font-size: 18px;
    font-weight: bold;
    text-align: center;
}

.nav-buttons {
    display: flex;
    gap: 10px;
    justify-content: center;
    align-items: center;
}

.nav-buttons button {
    padding: 10px 15px;
    background-color: #007bff;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

.nav-buttons button:hover {
    background-color: #0056b3;
}

.nav-buttons button:disabled {
    background-color: #ccc;
    cursor: not-allowed;
}

.timetable-container {
    display: flex;
    justify-content: center;
    background-color: white;
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    overflow: hidden;
}

#timetable {
    background-color: white;
}

/* Responsive design for mobile */
@media (max-width: 600px) {
    .container {
        padding: 10px;
    }
    
    .navigation {
        gap: 10px;
    }
    
    .nav-buttons {
        width: 100%;
        justify-content: center;
    }
    
    .timetable-container {
        max-width: 100%;
    }
}