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

body {
    font-family: 'Plus Jakarta Sans', 'Inter', sans-serif;
    overflow-x: hidden;
}

::-webkit-scrollbar {
    width: 5px;
    height: 5px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 10px;
}

.dark ::-webkit-scrollbar-thumb {
    background: #475569;
}

.sidebar-link {
    transition: all .25s cubic-bezier(.4, 0, .2, 1);
    position: relative;
    overflow: hidden;
}

.sidebar-link::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 0;
    background: linear-gradient(135deg, rgba(99, 102, 241, .12), rgba(129, 140, 248, .08));
    border-radius: 12px;
    transition: width .25s ease;
    z-index: 0;
}

.sidebar-link:hover::before,
.sidebar-link.active::before {
    width: 100%;
}

.sidebar-link::after {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 0;
    background: linear-gradient(180deg, #6366f1, #818cf8);
    border-radius: 0 6px 6px 0;
    transition: height .25s ease;
}

.sidebar-link:hover::after,
.sidebar-link.active::after {
    height: 55%;
}

.sidebar-link.active {
    color: #6366f1;
    font-weight: 600;
}

.sidebar-link:hover {
    color: #6366f1;
}

.dark .sidebar-link.active {
    color: #818cf8;
}

.dark .sidebar-link:hover {
    color: #818cf8;
}

.stat-card {
    transition: all .35s cubic-bezier(.4, 0, .2, 1);
    overflow: hidden;
}

.stat-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 25px 50px -12px rgba(99, 102, 241, .12);
}

.dark .stat-card:hover {
    box-shadow: 0 25px 50px -12px rgba(99, 102, 241, .25);
}

.stat-card .stat-icon {
    transition: all .35s ease;
}

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

.notification-panel,
.messenger-panel {
    max-width: calc(100vw - 1rem);
}

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

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

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

@keyframes slideInRight {
    from {
        transform: translateX(100%);
        opacity: 0;
    }

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

@keyframes scaleIn {
    from {
        transform: scale(.92);
        opacity: 0;
    }

    to {
        transform: scale(1);
        opacity: 1;
    }
}

@keyframes float {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-6px);
    }
}

@keyframes blob {

    0%,
    100% {
        border-radius: 60% 40% 30% 70%/60% 30% 70% 40%;
    }

    50% {
        border-radius: 30% 60% 70% 40%/50% 60% 30% 60%;
    }
}

@keyframes shimmer {
    0% {
        background-position: -200% 0;
    }

    100% {
        background-position: 200% 0;
    }
}

@keyframes pulse-ring {
    0% {
        transform: scale(.95);
        opacity: 1;
    }

    100% {
        transform: scale(1.5);
        opacity: 0;
    }
}

.animate-fadeInUp {
    animation: fadeInUp .6s cubic-bezier(.4, 0, .2, 1) both;
}

.animate-scaleIn {
    animation: scaleIn .25s ease both;
}

.animate-float {
    animation: float 3s ease-in-out infinite;
}

.animate-blob {
    animation: blob 8s ease-in-out infinite;
}

.s1 {
    animation-delay: .05s;
}

.s2 {
    animation-delay: .1s;
}

.s3 {
    animation-delay: .15s;
}

.s4 {
    animation-delay: .2s;
}

.s5 {
    animation-delay: .25s;
}

.s6 {
    animation-delay: .3s;
}

.s7 {
    animation-delay: .35s;
}

.s8 {
    animation-delay: .4s;
}

.table-container {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.table-container table {
    min-width: 900px;
}

.badge-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    display: inline-block;
}

.badge-dot.online {
    background: #22c55e;
    box-shadow: 0 0 0 3px rgba(34, 197, 94, .2);
}

.badge-dot.offline {
    background: #94a3b8;
}

.hover-lift {
    transition: all .3s cubic-bezier(.4, 0, .2, 1);
}

.hover-lift:hover {
    transform: translateY(-3px);
}

.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, .5);
    z-index: 40;
    backdrop-filter: blur(4px);
}

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

@media(max-width:1023px) {
    .sidebar-desktop {
        transform: translateX(-100%);
        position: fixed;
        z-index: 50;
    }

    .sidebar-desktop.open {
        transform: translateX(0);
    }
}

.tooltip-trigger {
    position: relative;
}

.tooltip-trigger .tooltip-text {
    visibility: hidden;
    opacity: 0;
    position: absolute;
    bottom: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%);
    background: #1e293b;
    color: #fff;
    padding: 4px 12px;
    border-radius: 8px;
    font-size: 11px;
    white-space: nowrap;
    transition: all .2s;
    z-index: 100;
    pointer-events: none;
}

.dark .tooltip-trigger .tooltip-text {
    background: #e2e8f0;
    color: #1e293b;
}

.tooltip-trigger:hover .tooltip-text {
    visibility: visible;
    opacity: 1;
}

.toast-container {
    position: fixed;
    top: 1rem;
    right: 1rem;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: .5rem;
    pointer-events: none;
}

.toast {
    pointer-events: auto;
    animation: slideInRight .3s ease, fadeIn .3s ease;
}

.quick-btn {
    transition: all .25s ease;
}

.quick-btn:hover {
    transform: scale(1.05);
}

.quick-btn:active {
    transform: scale(.97);
}

.live-dot {
    width: 8px;
    height: 8px;
    background: #22c55e;
    border-radius: 50%;
    position: relative;
}

.live-dot::before {
    content: '';
    position: absolute;
    inset: -3px;
    border: 2px solid #22c55e;
    border-radius: 50%;
    animation: pulse-ring 1.5s ease-out infinite;
}

.progress-bar {
    position: relative;
    overflow: hidden;
}

.progress-bar::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, .3), transparent);
    animation: shimmer 2s infinite;
}

.img-cover {
    object-fit: cover;
    width: 100%;
    height: 100%;
}

.exam-card {
    transition: all .3s cubic-bezier(.4, 0, .2, 1);
}

.exam-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 22px 44px -14px rgba(99, 102, 241, .2);
}

.dark .exam-card:hover {
    box-shadow: 0 22px 44px -14px rgba(99, 102, 241, .35);
}

.checkbox-custom {
    appearance: none;
    width: 18px;
    height: 18px;
    border: 2px solid #cbd5e1;
    border-radius: 5px;
    cursor: pointer;
    transition: all .2s;
    position: relative;
}

.checkbox-custom:checked {
    background: linear-gradient(135deg, #6366f1, #4f46e5);
    border-color: #6366f1;
}

.checkbox-custom:checked::after {
    content: '✓';
    position: absolute;
    color: #fff;
    font-size: 11px;
    font-weight: bold;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.dark .checkbox-custom {
    border-color: #475569;
}

.ex-g1 {
    background: linear-gradient(135deg, #6366f1, #4f46e5);
}

.ex-g2 {
    background: linear-gradient(135deg, #22c55e, #16a34a);
}

.ex-g3 {
    background: linear-gradient(135deg, #f59e0b, #f97316);
}

.ex-g4 {
    background: linear-gradient(135deg, #f43f5e, #e11d48);
}

.ex-g5 {
    background: linear-gradient(135deg, #0ea5e9, #0284c7);
}

.ex-g6 {
    background: linear-gradient(135deg, #8b5cf6, #7c3aed);
}

.countdown-box {
    background: rgba(255, 255, 255, .18);
    backdrop-filter: blur(8px);
}