* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    background-color: #f0f2f5;
}

/* Main content */
.main-content {
    margin-left: 280px;
    padding: 20px;
    transition: margin-left 0.3s ease;
}

.main-content.expanded {
    margin-left: 0;
}

.container {
    max-width: 800px;
    margin: 0 auto;
}

h1 {
    text-align: center;
    color: #2c3e50;
    margin-bottom: 30px;
    margin-right: 60px;
    margin-left: 60px;
}

.hidden {
    display: none !important;
}

/* Utility class to disable transitions */
.no-transition {
    transition: none !important;
}