/* Reset and Base Styles */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    line-height: 1.6;
    background-color: #d4d4d9;
    color: #333;
}

/* Header and Navigation Styles */
header {
    background-color: #1a3a5e;
    position: relative;
    z-index: 1000;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 20px;
}

.logo {
    color: #fff;
    font-size: 24px;
    font-weight: bold;
    text-decoration: none;
    padding: 15px 0;
}

/* Main Menu Grid */
.nav-menu {
    display: flex;
    list-style: none;
}

.nav-item {
    position: relative;
}

.nav-link {
    display: block;
    color: #e0e0e0;
    text-decoration: none;
    padding: 20px 15px;
    font-size: 15px;
    font-weight: 500;
    transition: background 0.3s, color 0.3s;
}

.nav-link:hover {
    background-color: #2a6a9e;
    color: #fff;
}

/* Dropdown Menus (Desktop) */
.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background-color: #ffffff;
    min-width: 180px;
    list-style: none;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    border-radius: 0 0 4px 4px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s;
}

.dropdown-menu a {
    display: block;
    padding: 12px 20px;
    color: #333;
    text-decoration: none;
    font-size: 14px;
    white-space: nowrap;
    transition: background 0.2s;
}

.dropdown-menu a:hover {
    background-color: #f0f4f8;
    color: #0056b3;
}

/* Show Dropdown on Hover & Arrow Indicator */
.nav-item:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.has-dropdown>.nav-link::after {
    content: '▼';
    padding-left: 4px;
    font-size: 10px;
    color: #fff;
    opacity: 0.8;
}

/* Content Area */
.main-content {
    max-width: 1000px;
    margin: 40px auto;
    padding: 0 20px;
}

.card {
    background: #fff;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.dropdown-divider {
    border-top: 1px solid #d0d8e0;
    margin: 6px 1em;
}