:root {
    --primary: #4e73df;
    --secondary: #1cc88a;
    --accent: #36b9cc;
    --dark: #2c3e50;
    --light: #f8f9fc;
    --transition: all 0.3s ease;
}

body {
    background-color: #f5f7fb;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    min-height: 100vh;
    overflow-x: hidden;
}

/* Dashboard Layout */
.dashboard-container {
    display: grid;
    grid-template-columns: 260px 1fr;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    background: linear-gradient(180deg, var(--primary), #3a56c4);
    color: white;
    padding: 20px 0;
    box-shadow: 0 0 25px rgba(0,0,0,0.1);
    position: fixed;
    width: 260px;
    height: 100vh;
    z-index: 1000;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    left: 0;
    top: 0;
}

.sidebar-content {
    flex: 1;
    overflow-y: auto;
    padding-bottom: 20px;
}

.sidebar-header {
    padding: 0 20px 20px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
    margin-bottom: 20px;
    text-align: center;
}

.institute-logo {
    width: 80px;
    height: 80px;
    background: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 15px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
    transition: var(--transition);
}

.institute-logo:hover {
    transform: scale(1.05);
}

.institute-logo i {
    font-size: 40px;
    color: var(--primary);
}

.nav-item {
    margin-bottom: 5px;
    transition: var(--transition);
}

.nav-link {
    color: rgba(255,255,255,0.8);
    padding: 12px 25px;
    display: flex;
    align-items: center;
    border-radius: 0 30px 30px 0;
    margin: 0 15px;
    transition: var(--transition);
}

.nav-link:hover, .nav-link.active {
    color: white;
    background: rgba(255,255,255,0.15);
    transform: translateX(5px);
}

.nav-link i {
    width: 30px;
    font-size: 18px;
}

.nav-link .badge {
    margin-left: auto;
    background: var(--secondary);
}

.nav-item.mt-4 {
    margin-top: auto !important;
    padding-bottom: 20px;
}

/* Academic Management Toggle Styles */
[data-bs-target="#academicCollapse"] {
    cursor: pointer;
    position: relative;
}

[data-bs-target="#academicCollapse"] .fa-angle-down {
    transition: transform 0.3s ease;
    margin-left: auto;
}

.nav-link[aria-expanded="true"] .fa-angle-down {
    transform: rotate(180deg);
}

.collapse {
    transition: height 0.3s ease;
}

#academicCollapse.show {
    height: auto;
    overflow: visible;
}

/* Topbar */
.topbar {
    background: white;
    position: fixed;
    top: 0;
    right: 0;
    left: 260px;
    z-index: 999;
    padding: 15px 25px;
    box-shadow: 0 2px 15px rgba(0,0,0,0.05);
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: var(--transition);
}

/* Menu Toggle Button */
.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 24px;
    color: var(--dark);
    cursor: pointer;
    padding: 10px;
    margin-right: 10px;
    z-index: 1001;
}

/* Main Content */
.main-content {
    grid-column: 2;
    padding: 20px;
    padding-top: 80px;
    transition: var(--transition);
}

/* When sidebar is collapsed */
.sidebar.collapsed {
    transform: translateX(-100%);
}

.sidebar.collapsed + .main-content .topbar {
    left: 0;
}

/* Search Box */
.search-box {
    position: relative;
    max-width: 400px;
}

.search-box input {
    border-radius: 50px;
    padding-left: 45px;
    border: 1px solid #e0e6ed;
    transition: var(--transition);
}

.search-box input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 0.25rem rgba(78, 115, 223, 0.25);
}

.search-box i {
    position: absolute;
    left: 18px;
    top: 12px;
    color: #aab7cf;
}

/* User Menu */
.user-menu {
    display: flex;
    align-items: center;
    gap: 20px;
}

.notification-bell {
    position: relative;
    color: var(--dark);
    font-size: 20px;
    cursor: pointer;
}

.notification-badge {
    position: absolute;
    top: -5px;
    right: -5px;
    background: #e74a3b;
    color: white;
    font-size: 10px;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.user-profile {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
}

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(45deg, var(--primary), var(--accent));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    font-size: 18px;
}

/* Dashboard Cards */
.dashboard-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
    margin-bottom: 30px;
}

.dashboard-card {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0,0,0,0.05);
    transition: var(--transition);
    animation: fadeIn 0.5s forwards;
}

.dashboard-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0,0,0,0.1);
}

.card-header {
    display: flex;
    align-items: center;
    padding: 20px;
    border-bottom: 1px solid #f0f3f9;
}

.card-icon {
    width: 60px;
    height: 60px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    margin-right: 15px;
}

.icon-primary {
    background: rgba(78, 115, 223, 0.15);
    color: var(--primary);
}

.icon-secondary {
    background: rgba(28, 200, 138, 0.15);
    color: var(--secondary);
}

.icon-accent {
    background: rgba(54, 185, 204, 0.15);
    color: var(--accent);
}

.card-title {
    font-size: 16px;
    color: #6e707e;
    margin-bottom: 5px;
}

.card-value {
    font-size: 24px;
    font-weight: 700;
    color: var(--dark);
}

.card-body {
    padding: 20px;
}

/* Charts */
.chart-container {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0,0,0,0.05);
    padding: 20px;
    margin-bottom: 30px;
    animation: slideInUp 0.5s forwards;
}

.chart-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.chart-canvas-container {
    position: relative;
    height: 300px;
    width: 100%;
}

.course-legend {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-top: 20px;
    flex-wrap: wrap;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 8px;
}

.legend-color {
    width: 15px;
    height: 15px;
    border-radius: 3px;
}

/* Quick Actions */
.quick-actions {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.action-card {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    text-align: center;
    padding: 30px 20px;
    transition: var(--transition);
    animation: fadeIn 0.5s forwards;
}

.action-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0,0,0,0.1);
}

.action-card i {
    font-size: 40px;
    margin-bottom: 20px;
    background: linear-gradient(45deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.action-card h3 {
    font-size: 18px;
    margin-bottom: 10px;
    color: var(--dark);
}

.action-card p {
    color: #6e707e;
    font-size: 14px;
    margin-bottom: 20px;
}

.action-card .btn {
    border-radius: 50px;
    padding: 8px 20px;
    font-weight: 600;
}

/* Footer */
.dashboard-footer {
    text-align: center;
    padding: 20px;
    color: #6e707e;
    font-size: 14px;
    border-top: 1px solid #f0f3f9;
    margin-top: 30px;
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes slideInUp {
    from { opacity: 0; transform: translateY(50px); }
    to { opacity: 1; transform: translateY(0); }
}

.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }
.delay-4 { animation-delay: 0.4s; }

/* CRUD Modals */
.crud-modal .modal-header {
    background: linear-gradient(90deg, #4e73df, #3a56c4);
    color: white;
}

.crud-modal .modal-title {
    font-weight: 600;
}

.form-label.required:after {
    content: " *";
    color: red;
}

/* Mobile view adjustments */
@media (max-width: 992px) {
    .dashboard-container {
        grid-template-columns: 1fr;
    }

    .sidebar {
        transform: translateX(-100%);
        width: 280px;
    }

    .sidebar.active {
        transform: translateX(0);
    }

    .topbar {
        left: 0;
    }

    .main-content {
        grid-column: 1;
        padding-left: 20px;
        padding-right: 20px;
    }

    .menu-toggle {
        display: block;
    }

    /* Overlay when sidebar is open */
    .sidebar-overlay {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background-color: rgba(0,0,0,0.5);
        z-index: 998;
        display: none;
    }

    .sidebar.active + .sidebar-overlay {
        display: block;
    }
}

@media (max-width: 768px) {
    .dashboard-cards {
        grid-template-columns: 1fr;
    }

    .quick-actions {
        grid-template-columns: 1fr;
    }

    .user-info {
        display: none;
    }
}