/* استايل الهيدر */
.navbar {
    font-family: 'Cairo', Arial, sans-serif;
    font-size: 1.1rem;
    background: rgba(255,255,255,0.96) !important;
    box-shadow: 0 2px 16px #b9d4ee22;
    border-radius: 0 0 24px 24px;
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 1000;
    width: 100%;
    transition: box-shadow 0.2s, background 0.2s;
}
.navbar-brand {
    color: #3f51b5 !important;
    font-size: 2rem;
    letter-spacing: 1.5px;
    background: linear-gradient(90deg, #3f51b5 30%, #00bcd4 90%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 700;
}
.navbar-nav .nav-link.active, .navbar-nav .nav-link:hover {
    color: #00bcd4 !important;
    font-weight: bold;
    background: #f3f7ff;
    border-radius: 10px;
    transition: background 0.2s;
}