body, html {
    height: 100%;
}
.navbar {
    z-index: 1080;
}
.sidebar {
    min-height: 100vh;
    border-right: 1px solid #eaeaea;
    background: #fff;
    position: fixed;
    left: 0;
    width: 250px;
    top: 56px; /* height of navbar */
    transition: left 0.3s;
    z-index: 1070;
}
.sidebar .nav-link.active {
    background: #e3f2fd;
    color: #0d6efd;
}
.sidebar-toggler {
    display: none;
}
@media (max-width: 991.98px) {
    .sidebar {
        left: -250px;
    }
    .sidebar.show {
        left: 0;
    }
    .content-area {
        margin-left: 0 !important;
    }
    .sidebar-toggler {
        display: inline-block;
    }
}
@media (min-width: 992px) {
    .sidebar {
        left: 0;
    }
    .content-area {
        margin-left: 250px;
    }
}
.card-dashboard {
    min-width: 220px;
    margin-bottom: 1rem;
}
.hero-section {
    margin-top: 56px; /* height of navbar */
}
@media (max-width: 991.98px) {
    .hero-section {
        margin-left: 0;
    }
}
@media (min-width: 992px) {
    .hero-section {
        margin-left: 250px;
    }
}
main.content-area {
    margin-top: 0;
}
/* Sidebar nav hover effect */
#sidebarMenu .nav-link {
    color: #000;              /* default text color */
    border-radius: 0.5rem;    /* slight rounding for hover effect */
    transition: background-color 0.2s ease;
}

#sidebarMenu .nav-link:hover {
    background-color: #adb5bd; /* Bootstrap "secondary" gray */
    color: #000;               /* keep text visible */
}
/* Navbar nav hover effect */
.navbar .nav-link {
    color: #000;              /* default text color */
    border-radius: 0.5rem;    /* rounded background for hover */
    transition: background-color 0.2s ease;
}

.navbar .nav-link:hover {
    background-color: #adb5bd; /* subtle gray highlight */
    color: #000;               /* keep text visible */
}
.blinking {
    animation: blink 1s steps(1, start) infinite;
}
@keyframes blink {
    0% { opacity: 1; }
    50% { opacity: 0; }
    100% { opacity: 1; }
}