/* ===================================
   ONLINE ASSESSMENT SYSTEM - STYLES
   Beautiful, Animated, Responsive CSS
   =================================== */

:root {
    --primary: #667eea;
    --primary-dark: #5568d3;
    --secondary: #764ba2;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --info: #3b82f6;
    --light: #f8f9fa;
    --dark: #1f2937;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    --white: #ffffff;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===================================
   GLOBAL STYLES
   =================================== */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: #f5f7fa;
    color: var(--gray-800);
    line-height: 1.6;
    overflow-x: hidden;
}

.page-wrapper {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
}

.main-content {
    flex: 1;
    margin-top: 70px;
    padding: 0;
}

.content-container {
    max-width: 100%;
    margin: 0 auto;
}

/* ===================================
   NAVIGATION MENU
   =================================== */

.navbar-custom {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    box-shadow: var(--shadow-lg);
    padding: 0.75rem 0;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1030;
    transition: var(--transition);
}

    .navbar-custom .navbar-nav {
        align-items: center;
        display: flex;
    }

    .navbar-custom .nav-item {
        display: flex;
        align-items: center;
        margin: 0;
        position: relative;
    }

        /* Ensure regular nav-items without dropdown-hover also align properly */
        .navbar-custom .nav-item:not(.dropdown-hover) {
            display: flex;
            align-items: center;
        }

.navbar-brand {
    color: var(--white) !important;
    font-size: 1.5rem;
    font-weight: 700;
    transition: var(--transition);
}

    .navbar-brand:hover {
        transform: scale(1.05);
    }

.navbar-custom .brand-text {
    background: linear-gradient(to right, #fff, #e0e7ff);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.navbar-custom .nav-link {
    color: rgba(255, 255, 255, 0.9) !important;
    font-weight: 500;
    padding: 0.5rem 1rem !important;
    border-radius: 8px;
    margin: 0 0.25rem;
    transition: var(--transition);
    position: relative;
    display: inline-flex !important;
    align-items: center;
    line-height: 1.5;
    vertical-align: middle;
}

    .navbar-custom .nav-link:hover {
        background: rgba(255, 255, 255, 0.1);
        color: var(--white) !important;
        transform: translateY(-2px);
    }

    .navbar-custom .nav-link i {
        margin-right: 0.35rem;
        font-size: 0.95rem;
        line-height: 1;
        vertical-align: middle;
    }

/* ===================================
   ANIMATED DROPDOWN MENU
   =================================== */

.dropdown-hover {
    position: relative;
    display: flex;
    align-items: center;
}

    /* Create invisible bridge for smooth hover - doesn't affect layout */
    .dropdown-hover::after {
        content: '';
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        height: 10px;
        display: none;
        z-index: 1049;
        pointer-events: auto;
    }

    .dropdown-hover:hover::after {
        display: block;
    }

    .dropdown-hover > .nav-link {
        display: inline-flex !important;
        align-items: center;
    }

        .dropdown-hover > .nav-link.dropdown-toggle::after {
            display: none !important;
            content: none !important;
        }

.dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    min-width: 280px;
    background: var(--white);
    border: none;
    border-radius: 12px;
    box-shadow: var(--shadow-xl);
    padding: 0.5rem 0;
    margin-top: 0;
    opacity: 0;
    transform: translateY(-10px);
    transition: var(--transition);
    left: 0;
    right: auto;
    z-index: 1050;
}

/* For right-aligned dropdowns (notifications, profile) */
.dropdown-menu-end {
    left: auto;
    right: 0;
}

.dropdown-hover:hover > .dropdown-menu {
    display: block;
    opacity: 1;
    transform: translateY(0);
    animation: dropdownSlideDown 0.3s ease-out;
}

@keyframes dropdownSlideDown {
    0% {
        opacity: 0;
        transform: translateY(-10px);
    }

    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes dropdownSlideIn {
    0% {
        opacity: 0;
        transform: translateY(-10px);
    }

    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===================================
   NESTED DROPDOWN SUBMENU
   =================================== */

.dropdown-submenu {
    position: relative;
}

    .dropdown-submenu > .dropdown-item.dropdown-toggle::after {
        display: inline-block;
        margin-left: auto;
        content: "";
        border-top: 0.3em solid transparent;
        border-bottom: 0.3em solid transparent;
        border-left: 0.3em solid;
        vertical-align: middle;
    }

    .dropdown-submenu > .dropdown-menu {
        display: none;
        top: 0;
        left: 100%;
        margin-top: -0.5rem;
        margin-left: 0;
    }

    .dropdown-submenu:hover > .dropdown-menu {
        display: block;
        opacity: 1;
        transform: translateY(0);
        animation: dropdownSlideDown 0.3s ease-out;
    }

.dropdown-item {
    color: var(--gray-700);
    padding: 0.5rem 1.15rem;
    font-size: 0.875rem;
    transition: var(--transition);
    display: flex;
    align-items: center;
}

    .dropdown-item i {
        width: 20px;
        color: var(--gray-600);
        transition: var(--transition);
    }

    .dropdown-item:hover {
        background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
        color: var(--white);
        padding-left: 2rem;
    }

        .dropdown-item:hover i {
            color: var(--white);
            transform: scale(1.2);
        }

.dropdown-divider {
    margin: 0.5rem 0;
    border-color: var(--gray-200);
}

.dropdown-header {
    padding: 0.5rem 1.15rem;
    font-weight: 600;
    color: var(--gray-800);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* ===================================
   NOTIFICATION DROPDOWN
   =================================== */

.notification-dropdown {
    display: flex;
    align-items: center;
}

    .notification-dropdown .nav-link {
        position: relative;
        padding: 0.5rem 1rem !important;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        min-width: 45px;
    }

        .notification-dropdown .nav-link i {
            font-size: 1.15rem;
        }

.notification-badge {
    position: absolute;
    top: 5px;
    right:15px;
    background: var(--danger);
    color: var(--white);
    font-size: 0.65rem;
    font-weight: 700;
    padding: 0;
    border-radius: 50%;
    width: 18px;
    height: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    line-height: 1;
    border: 2px solid var(--white);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    animation: pulse 2s infinite;
}

    /* For larger numbers (10+) */
    .notification-badge.large {
        width: 20px;
        height: 20px;
        font-size: 0.6rem;
        top: -3px;
        right: 4px;
    }

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        opacity: 1;
    }

    50% {
        transform: scale(1.15);
        opacity: 0.9;
    }
}

.notification-menu {
    min-width: 300px;
    max-height: 380px;
    overflow-y: auto;
    left: auto;
    right: 0;
    top: 100%;
    margin-top: 0;
}

/* Ensure notification menu doesn't overflow on smaller screens */
@media (max-width: 575.98px) {
    .notification-menu {
        min-width: 280px;
        max-width: 90vw;
    }
}

.notification-menu .dropdown-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.6rem 1rem;
    border-bottom: 1px solid var(--gray-200);
}

.mark-all-read {
    font-size: 0.8rem;
    color: var(--primary);
    text-decoration: none;
    font-weight: 500;
}

    .mark-all-read:hover {
        color: var(--primary-dark);
    }

.notification-item {
    border-left: 3px solid transparent;
    transition: var(--transition);
}

    .notification-item.unread {
        background: #f0f4ff;
        border-left-color: var(--primary);
    }

    .notification-item .dropdown-item {
        display: flex;
        padding: 0.6rem 1rem;
        align-items: flex-start;
        white-space: normal;
    }

    .notification-item:hover {
        background: var(--gray-100);
        border-left-color: var(--primary);
    }

.notification-icon {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 0.75rem;
    flex-shrink: 0;
}

    .notification-icon i {
        color: var(--white);
        font-size: 0.85rem;
    }

.notification-content {
    flex: 1;
}

    .notification-content strong {
        display: block;
        color: var(--gray-800);
        margin-bottom: 2px;
        font-size: 0.8rem;
    }

    .notification-content p {
        color: var(--gray-600);
        font-size: 0.78rem;
        margin-bottom: 2px;
    }

    .notification-content small {
        color: var(--gray-500);
        font-size: 0.7rem;
    }

.view-all {
    font-weight: 600;
    color: var(--primary) !important;
    padding: 0.6rem;
    font-size: 0.85rem;
}

/* ===================================
   USER PROFILE DROPDOWN
   =================================== */

.user-dropdown {
    display: flex;
    align-items: center;
}

    .user-dropdown .nav-link {
        display: inline-flex;
        align-items: center;
        padding: 0.25rem 1rem !important;
    }

.user-avatar {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    border: 2px solid rgba(255, 255, 255, 0.3);
    margin-right: 0.4rem;
    transition: var(--transition);
}

.user-avatar-initials {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--white);
    font-size: 0.75rem;
    font-weight: 700;
    line-height: 1;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    user-select: none;
}

.user-dropdown:hover .user-avatar {
    border-color: var(--white);
    transform: scale(1.1);
}

.user-name {
    font-weight: 500;
    max-width: 120px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.user-info {
    padding: 0.25rem 0;
}

    .user-info strong {
        display: block;
        color: var(--gray-800);
        font-size: 0.875rem;
    }

    .user-info small {
        color: var(--gray-600);
        font-size: 0.78rem;
    }

/* ===================================
   DASHBOARD HEADER
   =================================== */

.dashboard-header {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: var(--white);
    padding: 2.5rem 0;
    margin-bottom: 2rem;
    box-shadow: var(--shadow-lg);
}

    .dashboard-header h1 {
        margin-bottom: 0.5rem;
        animation: fadeInDown 0.6s ease-out;
    }

    .dashboard-header .lead {
        color: rgba(255, 255, 255, 0.9);
        animation: fadeInUp 0.6s ease-out;
    }

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.quick-stats {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.stat-badge {
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    color: var(--white);
    padding: 0.5rem 1rem;
    border-radius: 25px;
    font-weight: 600;
    font-size: 0.9rem;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    animation: fadeIn 0.6s ease-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

/* ===================================
   STAT CARDS
   =================================== */

.stat-card {
    background: var(--white);
    border-radius: 16px;
    padding: 1.5rem;
    box-shadow: var(--shadow);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    border: 2px solid transparent;
}

    .stat-card::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        height: 4px;
        background: linear-gradient(90deg, var(--primary), var(--secondary));
        transform: scaleX(0);
        transition: var(--transition);
    }

    .stat-card:hover {
        transform: translateY(-8px);
        box-shadow: var(--shadow-xl);
        border-color: var(--primary);
    }

        .stat-card:hover::before {
            transform: scaleX(1);
        }

.stat-card-primary::before {
    background: var(--primary);
}

.stat-card-success::before {
    background: var(--success);
}

.stat-card-warning::before {
    background: var(--warning);
}

.stat-card-info::before {
    background: var(--info);
}

.stat-icon {
    width: 60px;
    height: 60px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    margin-bottom: 1rem;
    transition: var(--transition);
}

.stat-card-primary .stat-icon {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1), rgba(102, 126, 234, 0.2));
    color: var(--primary);
}

.stat-card-success .stat-icon {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.1), rgba(16, 185, 129, 0.2));
    color: var(--success);
}

.stat-card-warning .stat-icon {
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.1), rgba(245, 158, 11, 0.2));
    color: var(--warning);
}

.stat-card-info .stat-icon {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1), rgba(59, 130, 246, 0.2));
    color: var(--info);
}

.stat-card:hover .stat-icon {
    transform: scale(1.1) rotate(5deg);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--gray-800);
    margin-bottom: 0.25rem;
    line-height: 1;
}

.stat-label {
    color: var(--gray-600);
    font-size: 0.95rem;
    margin-bottom: 1rem;
    font-weight: 500;
}

.stat-progress {
    margin-top: 1rem;
}

    .stat-progress .progress {
        height: 6px;
        border-radius: 10px;
        background: var(--gray-200);
        margin-bottom: 0.5rem;
    }

    .stat-progress .progress-bar {
        border-radius: 10px;
    }

    .stat-progress small {
        color: var(--gray-600);
        font-size: 0.85rem;
    }

.stat-link {
    display: inline-flex;
    align-items: center;
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    margin-top: 1rem;
    transition: var(--transition);
}

    .stat-link:hover {
        color: var(--primary-dark);
        gap: 0.5rem;
    }

    .stat-link i {
        margin-left: 0.5rem;
        transition: var(--transition);
    }

    .stat-link:hover i {
        transform: translateX(5px);
    }

/* ===================================
   DASHBOARD CARDS
   =================================== */

.dashboard-card {
    background: var(--white);
    border-radius: 16px;
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: var(--transition);
}

    .dashboard-card:hover {
        box-shadow: var(--shadow-lg);
    }

    .dashboard-card .card-header {
        background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
        color: var(--white);
        padding: 1.25rem 1.5rem;
        display: flex;
        justify-content: space-between;
        align-items: center;
        border: none;
    }

    .dashboard-card .card-title {
        margin: 0;
        font-size: 1.1rem;
        font-weight: 600;
        display: flex;
        align-items: center;
    }

    .dashboard-card .card-body {
        padding: 1.5rem;
    }

/* ===================================
   ASSESSMENT ITEMS
   =================================== */

.assessment-item {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    padding: 1.5rem;
    border: 2px solid var(--gray-200);
    border-radius: 12px;
    margin-bottom: 1rem;
    transition: var(--transition);
    position: relative;
}

    .assessment-item:last-child {
        margin-bottom: 0;
    }

    .assessment-item:hover {
        border-color: var(--primary);
        box-shadow: var(--shadow-md);
        transform: translateX(5px);
    }

    .assessment-item.urgent {
        border-left: 4px solid var(--danger);
        background: linear-gradient(90deg, rgba(239, 68, 68, 0.05), transparent);
    }

    .assessment-item.completed {
        opacity: 0.7;
        border-left: 4px solid var(--success);
    }

.assessment-icon {
    width: 50px;
    height: 50px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.assessment-info {
    flex: 1;
}

    .assessment-info h6 {
        font-weight: 600;
        color: var(--gray-800);
        margin-bottom: 0.25rem;
    }

.assessment-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 0.75rem;
}

.meta-item {
    display: inline-flex;
    align-items: center;
    color: var(--gray-600);
    font-size: 0.875rem;
    gap: 0.35rem;
}

.assessment-action {
    flex-shrink: 0;
}

/* ===================================
   GRADE ITEMS
   =================================== */

.grade-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    border-bottom: 1px solid var(--gray-200);
    transition: var(--transition);
}

    .grade-item:last-child {
        border-bottom: none;
    }

    .grade-item:hover {
        background: var(--gray-100);
        padding-left: 1.5rem;
    }

.grade-info h6 {
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: 0.25rem;
    font-size: 0.95rem;
}

.grade-score {
    width: 60px;
    height: 60px;
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    font-weight: 700;
}

    .grade-score .score {
        font-size: 1.5rem;
        line-height: 1;
    }

    .grade-score small {
        font-size: 0.75rem;
        font-weight: 600;
    }

.grade-a {
    background: linear-gradient(135deg, #10b981, #059669);
    color: var(--white);
}

.grade-b {
    background: linear-gradient(135deg, #3b82f6, #2563eb);
    color: var(--white);
}

.grade-c {
    background: linear-gradient(135deg, #f59e0b, #d97706);
    color: var(--white);
}

/* ===================================
   PROGRESS ITEMS
   =================================== */

.progress-item {
    margin-bottom: 1.5rem;
}

    .progress-item:last-child {
        margin-bottom: 0;
    }

.progress-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
}

    .progress-header span {
        color: var(--gray-600);
    }

    .progress-header strong {
        color: var(--gray-800);
    }

.progress-lg {
    height: 10px;
    border-radius: 10px;
    background: var(--gray-200);
}

.progress-bar {
    border-radius: 10px;
    transition: width 0.6s ease;
}

.bg-gradient-primary {
    background: linear-gradient(90deg, var(--primary), var(--secondary));
}

.bg-gradient-success {
    background: linear-gradient(90deg, var(--success), #059669);
}

.bg-gradient-info {
    background: linear-gradient(90deg, var(--info), #2563eb);
}

.bg-gradient-warning {
    background: linear-gradient(90deg, var(--warning), #d97706);
}

/* ===================================
   SCHEDULE ITEMS
   =================================== */

.schedule-item {
    display: flex;
    gap: 1rem;
    padding: 1rem;
    border-left: 3px solid var(--primary);
    background: var(--gray-100);
    border-radius: 8px;
    margin-bottom: 1rem;
    transition: var(--transition);
}

    .schedule-item:last-child {
        margin-bottom: 0;
    }

    .schedule-item:hover {
        background: var(--white);
        box-shadow: var(--shadow);
        transform: translateX(5px);
    }

.schedule-date {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 10px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--white);
    flex-shrink: 0;
}

    .schedule-date .day {
        font-size: 0.7rem;
        font-weight: 600;
        text-transform: uppercase;
    }

    .schedule-date .date {
        font-size: 1.5rem;
        font-weight: 700;
        line-height: 1;
    }

.schedule-info h6 {
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: 0.25rem;
}

/* ===================================
   FOOTER
   =================================== */

.app-footer {
    background: var(--gray-800);
    color: var(--white);
    padding: 0.5rem 0;
    padding-left: 10px;
    padding-right: 10px;
    margin-top: auto;
}

.footer-link {
    color: var(--white);
    text-decoration: none;
    transition: var(--transition);
}

    .footer-link:hover {
        color: var(--primary);
    }

/* ===================================
   RESPONSIVE DESIGN
   =================================== */

@media (max-width: 991.98px) {
    .navbar-custom .nav-link {
        padding: 0.75rem 1rem !important;
    }

    .dropdown-menu {
        position: static;
        display: none;
        transform: none;
        box-shadow: none;
        border-left: 3px solid var(--primary);
        margin-left: 1rem;
        left: auto;
        right: auto;
    }

    /* Keep notification and user dropdowns positioned correctly on mobile */
    .notification-dropdown .dropdown-menu,
    .user-dropdown .dropdown-menu {
        position: static;
        margin-left: 1rem;
        margin-right: 0;
        left: auto;
        right: auto;
    }

    .dropdown-hover:hover > .dropdown-menu {
        display: block;
        opacity: 1;
    }

    .user-name {
        display: none;
    }

    .quick-stats {
        justify-content: flex-start;
        margin-top: 1rem;
    }

    .assessment-item {
        flex-direction: column;
        text-align: center;
    }

    .assessment-action {
        width: 100%;
    }

        .assessment-action .btn {
            width: 100%;
        }
}

@media (max-width: 767.98px) {
    .dashboard-header {
        padding: 2rem 0;
    }

        .dashboard-header h1 {
            font-size: 1.75rem;
        }

    .stat-number {
        font-size: 2rem;
    }

    .notification-menu {
        min-width: 320px;
    }
}

/* ===================================
   UTILITIES
   =================================== */

/* Dropdown positioning fix for right-side menus */
.navbar-nav .nav-item.dropdown-hover:nth-last-child(-n+3) .dropdown-menu:not(.dropdown-menu-end) {
    left: auto;
    right: 0;
}

/* Ensure dropdowns stay within viewport */
.dropdown-menu {
    max-width: calc(100vw - 2rem);
}

.nav-btn {
    padding: 0.5rem 1.5rem;
    border-radius: 25px;
    font-weight: 600;
    margin-left: 0.5rem;
    transition: var(--transition);
}

    .nav-btn:hover {
        transform: translateY(-2px);
        box-shadow: var(--shadow-lg);
    }

.text-gradient {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Smooth scroll */
html {
    scroll-behavior: smooth;
}

/* Custom scrollbar */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--gray-200);
}

::-webkit-scrollbar-thumb {
    background: var(--primary);
    border-radius: 10px;
}

    ::-webkit-scrollbar-thumb:hover {
        background: var(--primary-dark);
    }

/* ===================================
   INSTRUCTOR & ADMIN SPECIFIC STYLES
   =================================== */

/* Course Cards */
.course-card {
    background: var(--white);
    border: 2px solid var(--gray-200);
    border-radius: 12px;
    padding: 1.25rem;
    transition: var(--transition);
    height: 100%;
}

    .course-card:hover {
        border-color: var(--primary);
        box-shadow: var(--shadow-md);
        transform: translateY(-3px);
    }

.course-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

    .course-header h6 {
        margin: 0;
        font-weight: 600;
        color: var(--gray-800);
    }

.course-stats {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--gray-200);
}

.stat-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--gray-600);
    font-size: 0.9rem;
}

    .stat-item i {
        color: var(--primary);
    }

.course-progress small {
    color: var(--gray-600);
    font-size: 0.85rem;
}

/* Quick Action Buttons */
.quick-action-btn {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem;
    background: var(--gray-100);
    border: 2px solid var(--gray-200);
    border-radius: 10px;
    color: var(--gray-800);
    text-decoration: none;
    margin-bottom: 0.75rem;
    transition: var(--transition);
    font-weight: 500;
}

    .quick-action-btn:last-child {
        margin-bottom: 0;
    }

    .quick-action-btn:hover {
        background: linear-gradient(135deg, var(--primary), var(--secondary));
        color: var(--white);
        border-color: var(--primary);
        transform: translateX(5px);
    }

    .quick-action-btn i {
        font-size: 1.25rem;
        width: 24px;
    }

/* Activity Items */
.activity-item {
    display: flex;
    gap: 1rem;
    padding: 1rem;
    border-bottom: 1px solid var(--gray-200);
    transition: var(--transition);
}

    .activity-item:last-child {
        border-bottom: none;
    }

    .activity-item:hover {
        background: var(--gray-100);
        padding-left: 1.5rem;
    }

.activity-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    color: var(--white);
}

.activity-content {
    flex: 1;
}

    .activity-content p {
        margin-bottom: 0.25rem;
        color: var(--gray-700);
    }

    .activity-content small {
        color: var(--gray-600);
        font-size: 0.8rem;
    }

/* Performer Items */
.performer-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    border-bottom: 1px solid var(--gray-200);
    transition: var(--transition);
}

    .performer-item:last-child {
        border-bottom: none;
    }

    .performer-item:hover {
        background: var(--gray-100);
    }

.rank {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.1rem;
    flex-shrink: 0;
}

.performer-item:first-child .rank {
    background: linear-gradient(135deg, #fbbf24, #f59e0b);
}

.performer-item:nth-child(2) .rank {
    background: linear-gradient(135deg, #94a3b8, #64748b);
}

.performer-item:nth-child(3) .rank {
    background: linear-gradient(135deg, #fb923c, #ea580c);
}

.performer-info {
    flex: 1;
}

    .performer-info h6 {
        margin-bottom: 0.25rem;
        font-weight: 600;
        color: var(--gray-800);
    }

.performer-score {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}

/* System Health Items */
.health-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem;
    border-bottom: 1px solid var(--gray-200);
    transition: var(--transition);
}

    .health-item:last-child {
        border-bottom: none;
    }

    .health-item:hover {
        background: var(--gray-100);
    }

.health-label {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 500;
    color: var(--gray-700);
}

    .health-label i {
        font-size: 1.25rem;
    }

/* Quick Stats Items */
.quick-stat-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--gray-200);
}

    .quick-stat-item:last-child {
        border-bottom: none;
    }

    .quick-stat-item .stat-label {
        color: var(--gray-600);
        font-weight: 500;
        margin: 0;
    }

    .quick-stat-item .stat-value {
        font-size: 1.5rem;
        font-weight: 700;
        color: var(--primary);
    }

/* System Alert Items */
.alert-item {
    display: flex;
    gap: 1rem;
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 0.75rem;
    border-left: 4px solid;
    transition: var(--transition);
}

    .alert-item:last-child {
        margin-bottom: 0;
    }

    .alert-item.warning {
        background: #fff7ed;
        border-color: var(--warning);
    }

    .alert-item.info {
        background: #eff6ff;
        border-color: var(--info);
    }

    .alert-item.danger {
        background: #fef2f2;
        border-color: var(--danger);
    }

    .alert-item:hover {
        transform: translateX(5px);
    }

.alert-icon {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}

.alert-item.warning .alert-icon {
    background: var(--warning);
    color: var(--white);
}

.alert-item.info .alert-icon {
    background: var(--info);
    color: var(--white);
}

.alert-item.danger .alert-icon {
    background: var(--danger);
    color: var(--white);
}

.alert-content strong {
    display: block;
    color: var(--gray-800);
    margin-bottom: 0.25rem;
}

.alert-content p {
    color: var(--gray-700);
    margin-bottom: 0.25rem;
    font-size: 0.9rem;
}

.alert-content small {
    color: var(--gray-600);
    font-size: 0.8rem;
}

/* Chart Placeholder */
.chart-placeholder {
    height: 300px;
    background: var(--gray-100);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.chart-info {
    text-align: center;
}

    .chart-info i {
        opacity: 0.5;
    }

    .chart-info h5 {
        color: var(--gray-700);
        margin-bottom: 0.5rem;
    }

    .chart-info p {
        color: var(--gray-600);
        margin: 0;
    }

/* Table Styles */
.table {
    margin-bottom: 0;
}

    .table thead th {
        background: var(--gray-100);
        color: var(--gray-700);
        font-weight: 600;
        text-transform: uppercase;
        font-size: 0.85rem;
        letter-spacing: 0.5px;
        border-bottom: 2px solid var(--gray-300);
    }

    .table tbody tr {
        transition: var(--transition);
    }

        .table tbody tr:hover {
            background: var(--gray-100);
        }

.table-responsive {
    border-radius: 8px;
}

/* ===================================
   RESPONSIVE ADJUSTMENTS
   =================================== */

@media (max-width: 991.98px) {
    .course-stats {
        flex-direction: column;
        gap: 0.75rem;
    }

    .quick-action-btn {
        padding: 0.85rem;
    }

    .chart-placeholder {
        height: 200px;
    }
}

@media (max-width: 767.98px) {
    .table {
        font-size: 0.875rem;
    }

        .table thead {
            display: none;
        }

        .table tr {
            display: block;
            margin-bottom: 1rem;
            border: 2px solid var(--gray-200);
            border-radius: 8px;
            padding: 1rem;
        }

        .table td {
            display: block;
            text-align: right;
            padding: 0.5rem 0;
            border-bottom: 1px solid var(--gray-200);
        }

            .table td:last-child {
                border-bottom: none;
            }

            .table td::before {
                content: attr(data-label);
                float: left;
                font-weight: 600;
                color: var(--gray-700);
            }
}

/* ===================================
   ANIMATIONS
   =================================== */

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Stat card and dashboard card entrance - use one-shot transition
   instead of CSS animation to prevent replay on Blazor re-renders */