/* Body layout */
body {
    width: 1140px;
    margin-left: auto;
    margin-right: auto;
}

/* Header with flex layout */
.site-header {
    background-color: rgb(255, 255, 255);
    display: flex;
}

/* Logo container - 25% width */
.logo-container {
    flex: 3;
    padding: 20px;
}

/* Logo image */
.logo-image {
    width: 250px;
}

/* Navigation container - 75% width */
.nav-container {
    flex: 9;
}

/* Right-aligned button */
.btn-right {
    float: right;
    margin-right: 10px;
}

/* Main content section */
.content-section {
    margin-top: 10px;
}

/* Content container with flex layout */
.content-flex-container {
    display: flex;
}

/* Sidebar container - 33% width */
.sidebar-container {
    flex: 4;
    padding: 0 15px;
}

/* Main content container - 67% width */
.main-content-container {
    flex: 8;
    padding: 0 15px;
}

/* Footer center block */
.footer-center-block {
    min-width: 0;
}

/* Underlined link */
.link-underlined {
    text-decoration: underline;
}