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

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

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: 'Plus Jakarta Sans', sans-serif
}

html,
body {
    max-width: 100vw;
    overflow-x: hidden
}

::-webkit-scrollbar {
    width: 6px;
    height: 6px
}

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

::-webkit-scrollbar-thumb {
    background: #94a3b8;
    border-radius: 3px
}

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

.glass {
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2)
}

.dark .glass {
    background: rgba(17, 24, 39, 0.9);
    border: 1px solid rgba(255, 255, 255, 0.05)
}

.glass-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    border: 1px solid rgba(226, 232, 240, 0.8);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05)
}

.dark .glass-card {
    background: rgba(30, 41, 59, 0.95);
    border: 1px solid rgba(255, 255, 255, 0.05)
}

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

.sidebar-overlay {
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px)
}

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

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

@keyframes fadeIn {
    from {
        opacity: 0
    }

    to {
        opacity: 1
    }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(.95)
    }

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

@keyframes live-dot {

    0%,
    100% {
        opacity: 1
    }

    50% {
        opacity: .4
    }
}

.skeleton {
    background: linear-gradient(90deg, #e2e8f0 25%, #f1f5f9 50%, #e2e8f0 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite
}

.dark .skeleton {
    background: linear-gradient(90deg, #1e293b 25%, #334155 50%, #1e293b 75%);
    background-size: 200% 100%
}

.animate-fadeIn {
    animation: fadeIn .3s ease
}

.animate-scaleIn {
    animation: scaleIn .3s ease
}

.live-dot {
    animation: live-dot 1.5s infinite
}

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

.hover-lift:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1)
}

.dark .hover-lift:hover {
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3)
}

.gradient-text {
    background: linear-gradient(135deg, #4F46E5, #7C3AED);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text
}

.nav-item.active {
    background: linear-gradient(135deg, #4F46E5, #7C3AED);
    color: white
}

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

.icon-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    min-width: 44px;
    min-height: 44px;
    border-radius: 12px;
    cursor: pointer;
    position: relative;
    z-index: 1;
    transition: all .2s;
    border: none;
    outline: none;
    -webkit-tap-highlight-color: transparent
}

.icon-btn:active {
    transform: scale(.92)
}

.icon-btn svg {
    pointer-events: none
}

.icon-btn .badge-dot {
    position: absolute;
    top: 8px;
    right: 8px;
    width: 9px;
    height: 9px;
    background: #EF4444;
    border-radius: 50%;
    border: 2px solid white
}

.dark .icon-btn .badge-dot {
    border-color: #111827
}

.slide-panel {
    position: fixed;
    top: 0;
    right: 0;
    height: 100%;
    height: 100dvh;
    z-index: 60;
    transform: translateX(100%);
    transition: transform .35s cubic-bezier(.4, 0, .2, 1);
    will-change: transform
}

.slide-panel.open {
    transform: translateX(0)
}

.panel-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(4px);
    z-index: 55;
    opacity: 0;
    pointer-events: none;
    transition: opacity .3s
}

.panel-overlay.active {
    opacity: 1;
    pointer-events: auto
}

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

    .sidebar.open {
        transform: translateX(0)
    }
}

.dropdown-menu {
    position: absolute;
    right: 0;
    top: calc(100% + 8px);
    z-index: 50;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px) scale(.97);
    transition: all .2s cubic-bezier(.4, 0, .2, 1)
}

.dropdown-menu.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1)
}

.tab-btn {
    transition: all .2s;
    position: relative
}

.tab-btn.active {
    color: #4F46E5;
    font-weight: 600
}

.tab-btn.active::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    right: 0;
    height: 2px;
    background: #4F46E5;
    border-radius: 2px
}

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

.exam-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.12)
}

.dark .exam-card:hover {
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4)
}

.exam-card .exam-header {
    background: linear-gradient(135deg, var(--gradient-from, #4F46E5), var(--gradient-to, #7C3AED));
    padding: 20px;
    color: white;
    position: relative;
    overflow: hidden
}

.exam-card .exam-header::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.15) 0%, transparent 70%);
    border-radius: 50%
}

.exam-live {
    --gradient-from: #EF4444;
    --gradient-to: #DC2626
}

.exam-scheduled {
    --gradient-from: #4F46E5;
    --gradient-to: #7C3AED
}

.exam-completed {
    --gradient-from: #10B981;
    --gradient-to: #059669
}

.exam-draft {
    --gradient-from: #F59E0B;
    --gradient-to: #D97706
}

.question-type-icon {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center
}

.difficulty-easy {
    color: #10B981;
    background: rgba(16, 185, 129, 0.1)
}

.difficulty-medium {
    color: #F59E0B;
    background: rgba(245, 158, 11, 0.1)
}

.difficulty-hard {
    color: #EF4444;
    background: rgba(239, 68, 68, 0.1)
}

.custom-checkbox {
    accent-color: #4F46E5;
    width: 16px;
    height: 16px;
    cursor: pointer;
    border-radius: 4px
}

.custom-radio {
    accent-color: #4F46E5;
    width: 16px;
    height: 16px;
    cursor: pointer
}

.live-badge {
    background: linear-gradient(135deg, #EF4444, #DC2626);
    color: white;
    padding: 4px 10px;
    border-radius: 9999px;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 10px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px
}

@supports(padding-bottom:env(safe-area-inset-bottom)) {
    .mobile-safe {
        padding-bottom: env(safe-area-inset-bottom)
    }
}

.quick-action-btn {
    transition: all .2s
}

.quick-action-btn:hover {
    transform: scale(1.03)
}

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

.question-card {
    transition: all .2s;
    border-left: 3px solid transparent
}

.question-card:hover {
    border-left-color: #4F46E5;
    background: rgba(79, 70, 229, 0.02)
}

.dark .question-card:hover {
    background: rgba(79, 70, 229, 0.05)
}

.score-ring {
    transform: rotate(-90deg)
}