/* Modern CSS Dropdown Menu */
#main_menu {
    background-color: #2a4462;
    height: 40px;
    width: 100%;
    position: relative;
    z-index: 1000;
    font-family: "Trebuchet MS", Verdana, Arial, Helvetica, sans-serif;
}

#main_menu ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
}

#main_menu li {
    position: relative;
}

#main_menu a {
    display: block;
    padding: 0 20px;
    line-height: 40px;
    color: #ffffff;
    text-decoration: none;
    font-weight: bold;
    font-size: 14px;
    white-space: nowrap;
    transition: background-color 0.3s;
}

#main_menu a:hover {
    background-color: #ffffff;
    color: #2a4462;
}

/* Submenu */
#main_menu ul ul {
    display: none;
    position: absolute;
    top: 40px;
    left: 0;
    background-color: #2a4462;
    min-width: 250px;
    flex-direction: column;
    border: 1px solid #ffffff;
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}

#main_menu li:hover > ul {
    display: flex;
}

#main_menu ul ul li {
    width: 100%;
}

#main_menu ul ul a {
    line-height: normal;
    padding: 10px 15px;
    font-weight: normal;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

#main_menu ul ul a:hover {
    background-color: #ffffff;
    color: #2a4462;
}

/* Third level menu (if needed) */
#main_menu ul ul ul {
    top: 0;
    left: 100%;
}

/* Banner and line fixes */
#mainContainer {
    width: 1000px; /* Biraz genişletildi */
}

.menu_separator {
    display: block;
    width: 100%;
    height: 3px;
    background: url('../images/cizgi.jpg') repeat-x;
    margin-bottom: 10px;
}