/* ═══════════════════════════════════════════════════════════════
   ExamBash — Premium SaaS Dashboard Styles
   ═══════════════════════════════════════════════════════════════ */

/* ── Design Tokens ── */
:root {
    --db-bg: #f6f7fb;
    --db-surface: #ffffff;
    --db-border: #eff1f5;
    --db-border-hover: #e2e5ec;
    --db-text: #1a1d26;
    --db-text-secondary: #5e6278;
    --db-text-muted: #99a1b7;
    --db-radius: 14px;
    --db-radius-sm: 10px;
    --db-radius-xs: 8px;
    --db-shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.02);
    --db-shadow: 0 4px 16px rgba(0, 0, 0, 0.05), 0 1px 3px rgba(0, 0, 0, 0.03);
    --db-shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.08), 0 4px 12px rgba(0, 0, 0, 0.04);
    --db-shadow-glow: 0 8px 32px rgba(124, 92, 252, 0.12);
    --db-primary: #7c5cfc;
    --db-primary-light: rgba(124, 92, 252, 0.08);
    --db-success: #22c55e;
    --db-success-light: rgba(34, 197, 94, 0.08);
    --db-info: #3b82f6;
    --db-info-light: rgba(59, 130, 246, 0.08);
    --db-warning: #f59e0b;
    --db-warning-light: rgba(245, 158, 11, 0.08);
    --db-danger: #ef4444;
    --db-danger-light: rgba(239, 68, 68, 0.08);
    --db-transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ═══════════════════════════════════════
   Welcome Banner
   ═══════════════════════════════════════ */
.dashboard-welcome {
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 50%, #b45309 100%);
    border-radius: var(--db-radius);
    padding: 1.125rem 1.75rem;
    color: #fff;
    position: relative;
    overflow: hidden;
    box-shadow: 0 8px 32px rgba(245, 158, 11, 0.25);
}

.dashboard-welcome::after {
    content: '';
    position: absolute;
    width: 320px;
    height: 320px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
    top: -120px;
    right: -80px;
}

.dashboard-welcome::before {
    content: '';
    position: absolute;
    width: 180px;
    height: 180px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.06) 0%, transparent 70%);
    bottom: -60px;
    right: 120px;
}

.dashboard-welcome h4 {
    font-weight: 700;
    font-size: 1.125rem;
    margin-bottom: 0.125rem;
    letter-spacing: -0.01em;
}

.dashboard-welcome p {
    opacity: 0.8;
    margin-bottom: 0;
    font-size: 0.8125rem;
    font-weight: 400;
}

.welcome-icon {
    font-size: 2.75rem;
    opacity: 0.15;
}

/* ═══════════════════════════════════════
   KPI Cards
   ═══════════════════════════════════════ */
.kpi-card {
    border: 1px solid var(--db-border);
    border-radius: var(--db-radius);
    background: var(--db-surface);
    transition: all var(--db-transition);
    overflow: hidden;
    position: relative;
    box-shadow: var(--db-shadow-sm);
}

.kpi-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--db-shadow) !important;
    border-color: var(--db-border-hover);
}

.kpi-card .kpi-accent {
    position: absolute;
    top: 0;
    left: 0;
    width: 3px;
    height: 100%;
    border-radius: var(--db-radius) 0 0 var(--db-radius);
}

.kpi-card .kpi-accent.accent-danger {
    background: linear-gradient(180deg, #ef4444, #f87171);
}

.kpi-card .kpi-accent.accent-info {
    background: linear-gradient(180deg, #3b82f6, #60a5fa);
}

    .kpi-card .kpi-accent.accent-primary {
        background: linear-gradient(180deg, #7c5cfc, #a78bfa);
    }

.kpi-card .kpi-accent.accent-success {
    background: linear-gradient(180deg, #22c55e, #4ade80);
}

.kpi-card .card-body {
    padding: 1rem 1.125rem 1rem 1.375rem;
}

.kpi-card .kpi-icon {
    width: 42px;
    height: 42px;
    border-radius: var(--db-radius-xs);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.15rem;
    transition: transform var(--db-transition);
}

.kpi-card:hover .kpi-icon {
    transform: scale(1.08);
}

.kpi-card .kpi-icon.bg-danger-subtle {
    background: var(--db-danger-light);
    color: var(--db-danger);
}

.kpi-card .kpi-icon.bg-info-subtle {
    background: var(--db-info-light);
    color: var(--db-info);
}

.kpi-card .kpi-icon.bg-primary-subtle {
    background: var(--db-primary-light);
    color: var(--db-primary);
}

.kpi-card .kpi-icon.bg-success-subtle {
    background: var(--db-success-light);
    color: var(--db-success);
}

.kpi-card .kpi-value {
    font-size: 1.625rem;
    font-weight: 800;
    line-height: 1.15;
    color: var(--db-text);
    letter-spacing: -0.02em;
}

.kpi-card .kpi-label {
    font-size: 0.6875rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--db-text-muted);
    font-weight: 600;
}

.kpi-card .kpi-stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.kpi-card .kpi-stat-item .stat-value {
    font-size: 0.9375rem;
    font-weight: 700;
    color: var(--db-text);
}

.kpi-card .kpi-stat-item .stat-label {
    font-size: 0.6875rem;
    color: var(--db-text-muted);
    font-weight: 500;
}

.kpi-card .kpi-divider {
    width: 1px;
    height: 26px;
    background: var(--db-border);
}

.kpi-card .kpi-footer-row {
    border-top: 1px solid var(--db-border);
}

/* ═══════════════════════════════════════
   Chart Cards
   ═══════════════════════════════════════ */
.chart-card {
    border: 1px solid var(--db-border);
    border-radius: var(--db-radius);
    background: var(--db-surface);
    overflow: hidden;
    box-shadow: var(--db-shadow-sm);
    transition: box-shadow var(--db-transition);
}

.chart-card:hover {
    box-shadow: var(--db-shadow);
}

.chart-card .card-header {
    background: transparent;
    border-bottom: 1px solid var(--db-border);
    padding: 1.375rem 1.5rem;
}

.chart-card .card-header .card-title {
    font-size: 0.9375rem;
    font-weight: 700;
    color: var(--db-text);
    letter-spacing: -0.01em;
}

.chart-card .card-header .card-subtitle {
    font-size: 0.8125rem;
    color: var(--db-text-muted);
    font-weight: 400;
}

    .chart-card .chart-hint-badge {
        display: inline-flex;
        align-items: center;
        gap: 0.375rem;
        padding: 0.375rem 0.875rem;
        background: var(--db-primary-light);
        color: var(--db-primary);
        border-radius: 20px;
        font-size: 0.6875rem;
        font-weight: 600;
        letter-spacing: 0.01em;
        border: 1px solid rgba(124, 92, 252, 0.12);
        transition: all var(--db-transition);
    }

        .chart-card .chart-hint-badge:hover {
            background: rgba(124, 92, 252, 0.14);
        }

/* ── Scrollable chart wrapper ── */
.chart-scroll-wrapper {
    max-height: 420px;
    overflow-y: auto;
    overflow-x: hidden;
    position: relative;
}

.chart-scroll-wrapper::-webkit-scrollbar {
    width: 5px;
}

.chart-scroll-wrapper::-webkit-scrollbar-track {
    background: transparent;
}

.chart-scroll-wrapper::-webkit-scrollbar-thumb {
    background: #dde0e8;
    border-radius: 10px;
}

.chart-scroll-wrapper::-webkit-scrollbar-thumb:hover {
    background: #b5b9c8;
}

/* ═══════════════════════════════════════
   Detail Panel (Floating Insight Card)
   ═══════════════════════════════════════ */
.detail-panel-wrapper {
    position: relative;
}

.chart-detail-panel {
    position: absolute;
    top: 12px;
    right: 12px;
    z-index: 100;
    width: 260px;
    background: var(--db-surface);
    border-radius: var(--db-radius);
    box-shadow: var(--db-shadow-lg);
    border: 1px solid var(--db-border);
    font-family: 'Inter', sans-serif;
    opacity: 0;
    visibility: hidden;
    transform: translateY(8px) scale(0.98);
    transition: opacity 0.25s ease, visibility 0.25s ease, transform 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    pointer-events: auto;
    backdrop-filter: blur(8px);
}

.chart-detail-panel.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
}

.chart-detail-panel .dp-header {
    padding: 16px 18px 12px;
    border-bottom: 1px solid var(--db-border);
    display: flex;
    align-items: flex-start;
    gap: 10px;
}

.chart-detail-panel .dp-header .dp-icon {
    width: 34px;
    height: 34px;
    border-radius: var(--db-radius-xs);
    background: var(--db-primary-light);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    color: var(--db-primary);
    font-size: 15px;
}

.chart-detail-panel .dp-header .dp-title {
    font-size: 0.8125rem;
    font-weight: 700;
    color: var(--db-text);
    line-height: 1.4;
    word-break: break-word;
}

.chart-detail-panel .dp-header .dp-date {
    font-size: 0.6875rem;
    color: var(--db-text-muted);
    margin-top: 2px;
}

.chart-detail-panel .dp-body {
    padding: 12px 18px;
}

.chart-detail-panel .dp-stat-row {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 6px 0;
    font-size: 0.8125rem;
    color: var(--db-text-secondary);
}

.chart-detail-panel .dp-stat-row .dp-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    flex-shrink: 0;
}

.chart-detail-panel .dp-stat-row .dp-val {
    margin-left: auto;
    font-weight: 800;
    color: var(--db-text);
    font-size: 0.875rem;
    font-variant-numeric: tabular-nums;
}

.chart-detail-panel .dp-completion {
    margin-top: 8px;
    padding: 10px 0 0;
    border-top: 1px solid var(--db-border);
}

.chart-detail-panel .dp-completion-bar {
    height: 6px;
    border-radius: 3px;
    background: #f1f3f9;
    overflow: hidden;
    margin-top: 6px;
}

    .chart-detail-panel .dp-completion-fill {
        height: 100%;
        border-radius: 3px;
        background: linear-gradient(90deg, var(--db-primary), #a78bfa);
        transition: width 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    }

.chart-detail-panel .dp-footer {
    padding: 0 18px 16px;
}

    .chart-detail-panel .dp-btn {
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 6px;
        width: 100%;
        padding: 9px 14px;
        background: linear-gradient(135deg, #7c5cfc 0%, #6341e0 100%);
        color: #fff;
        border: none;
        border-radius: var(--db-radius-xs);
        font-size: 0.8125rem;
        font-weight: 600;
        cursor: pointer;
        text-decoration: none;
        transition: all var(--db-transition);
        letter-spacing: 0.01em;
    }

        .chart-detail-panel .dp-btn:hover {
            box-shadow: 0 6px 20px rgba(124, 92, 252, 0.35);
            transform: translateY(-1px);
            color: #fff;
        }

.chart-detail-panel .dp-btn:active {
    transform: translateY(0);
}

.chart-detail-panel .dp-btn i {
    font-size: 15px;
}

/* ═══════════════════════════════════════
   Schedule Card
   ═══════════════════════════════════════ */
.schedule-card {
    border: 1px solid var(--db-border);
    border-radius: var(--db-radius);
    background: var(--db-surface);
    overflow: hidden;
    box-shadow: var(--db-shadow-sm);
    transition: box-shadow var(--db-transition);
}

.schedule-card:hover {
    box-shadow: var(--db-shadow);
}

.schedule-card .card-header {
    background: transparent;
    border-bottom: 1px solid var(--db-border);
    padding: 1.375rem 1.5rem;
}

.schedule-card .card-header h6 {
    font-weight: 700;
    color: var(--db-text);
    font-size: 0.9375rem;
    letter-spacing: -0.01em;
}

.schedule-card .card-header small {
    color: var(--db-text-muted);
    font-size: 0.8125rem;
}

.schedule-card .table thead th {
    background: #f8f9fc;
    font-size: 0.6875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--db-text-muted);
    border-bottom: 1px solid var(--db-border);
    padding: 0.875rem 1.25rem;
    white-space: nowrap;
}

.schedule-card .table tbody td {
    padding: 0.8125rem 1.25rem;
    font-size: 0.8125rem;
    color: var(--db-text-secondary);
    vertical-align: middle;
    border-bottom: 1px solid var(--db-border);
    transition: background var(--db-transition);
}

.schedule-card .table tbody tr:hover td {
    background: #f8f9fc;
}

.schedule-card .table tbody tr:last-child td {
    border-bottom: none;
}

.schedule-badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.schedule-badge-live {
    background: var(--db-danger-light);
    color: var(--db-danger);
}

.schedule-badge-practice {
    background: var(--db-info-light);
    color: var(--db-info);
}

.schedule-badge-default {
    background: var(--db-primary-light);
    color: var(--db-primary);
}

.schedule-count-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.375rem 0.875rem;
    background: var(--db-warning-light);
    color: #b45309;
    border-radius: 20px;
    font-size: 0.6875rem;
    font-weight: 600;
    border: 1px solid rgba(245, 158, 11, 0.15);
}

/* ═══════════════════════════════════════
   Passcode Card
   ═══════════════════════════════════════ */
.passcode-card {
    border: 1px solid var(--db-border);
    border-radius: var(--db-radius);
    background: var(--db-surface);
    overflow: hidden;
    box-shadow: var(--db-shadow-sm);
    transition: box-shadow var(--db-transition);
}

.passcode-card:hover {
    box-shadow: var(--db-shadow);
}

.passcode-card .card-header {
    background: transparent;
    border-bottom: 1px solid var(--db-border);
    padding: 1.375rem 1.5rem;
}

.passcode-card .card-header h6 {
    font-weight: 700;
    color: var(--db-text);
    font-size: 0.9375rem;
    letter-spacing: -0.01em;
}

.passcode-block {
    border-radius: var(--db-radius-sm);
    padding: 1.5rem;
    text-align: center;
    transition: all var(--db-transition);
}

    .passcode-block.primary-passcode {
        background: linear-gradient(135deg, rgba(124, 92, 252, 0.06) 0%, rgba(124, 92, 252, 0.03) 100%);
        border: 1px solid rgba(124, 92, 252, 0.12);
    }

        .passcode-block.primary-passcode:hover {
            border-color: rgba(124, 92, 252, 0.2);
        }

.passcode-block.secondary-passcode {
    background: #f8f9fc;
    border: 1px solid var(--db-border);
}

.passcode-label {
    font-size: 0.6875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 0.5rem;
}

.passcode-code {
    font-size: 2.25rem;
    font-weight: 800;
    letter-spacing: 8px;
    font-family: 'SF Mono', 'Fira Code', 'JetBrains Mono', monospace;
    color: var(--db-text);
    line-height: 1.3;
}

.passcode-timer {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    font-size: 0.8125rem;
    color: var(--db-primary);
    font-weight: 500;
}

.passcode-generate-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1.25rem;
    background: linear-gradient(135deg, #7c5cfc, #6341e0);
    color: #fff;
    border: none;
    border-radius: var(--db-radius-xs);
    font-weight: 600;
    font-size: 0.8125rem;
    transition: all var(--db-transition);
    cursor: pointer;
}

    .passcode-generate-btn:hover {
        box-shadow: 0 6px 20px rgba(124, 92, 252, 0.3);
        transform: translateY(-1px);
        color: #fff;
    }

/* ═══════════════════════════════════════
   Empty State
   ═══════════════════════════════════════ */
.empty-state {
    text-align: center;
    padding: 3rem 1.5rem;
}

.empty-state i {
    font-size: 2.75rem;
    color: #d4d8e8;
    display: block;
    margin-bottom: 0.75rem;
}

.empty-state h6 {
    color: var(--db-text-muted);
    font-weight: 500;
    font-size: 0.875rem;
}

/* ═══════════════════════════════════════
   Completion Ring
   ═══════════════════════════════════════ */
.completion-ring {
    position: relative;
    width: 56px;
    height: 56px;
}

.completion-ring svg {
    transform: rotate(-90deg);
}

.completion-ring .ring-value {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 0.75rem;
    font-weight: 800;
    color: var(--db-text);
}

/* ═══════════════════════════════════════
   Scrollbar
   ═══════════════════════════════════════ */
.custom-scroll::-webkit-scrollbar {
    width: 5px;
}

.custom-scroll::-webkit-scrollbar-track {
    background: transparent;
}

.custom-scroll::-webkit-scrollbar-thumb {
    background: #dde0e8;
    border-radius: 10px;
}

.custom-scroll::-webkit-scrollbar-thumb:hover {
    background: #b5b9c8;
}

/* ═══════════════════════════════════════
   ApexCharts Overrides
   ═══════════════════════════════════════ */
.apexcharts-tooltip {
    border: 1px solid var(--db-border) !important;
    border-radius: var(--db-radius-sm) !important;
    box-shadow: var(--db-shadow-lg) !important;
    background: var(--db-surface) !important;
    font-family: 'Inter', sans-serif !important;
}

.apexcharts-tooltip-title {
    background: #f8f9fc !important;
    border-bottom: 1px solid var(--db-border) !important;
    padding: 8px 14px !important;
    font-weight: 600 !important;
    font-size: 0.8125rem !important;
    color: var(--db-text) !important;
}

.apexcharts-tooltip-series-group {
    padding: 6px 14px !important;
}

.apexcharts-tooltip-text-y-value {
    font-weight: 700 !important;
}

.apexcharts-legend-text {
    font-family: 'Inter', sans-serif !important;
}

.apexcharts-gridline {
    stroke: #f0f2f8 !important;
}

/* ═══════════════════════════════════════
   Loading Skeleton Shimmer
   ═══════════════════════════════════════ */
@keyframes shimmer {
    0% { background-position: -400px 0; }
    100% { background-position: 400px 0; }
}

.skeleton {
    background: linear-gradient(90deg, #f0f2f8 25%, #e8ebf2 37%, #f0f2f8 63%);
    background-size: 800px 100%;
    animation: shimmer 1.5s ease-in-out infinite;
    border-radius: 6px;
}

.skeleton-text {
    height: 12px;
    width: 60%;
    margin-bottom: 6px;
}

.skeleton-number {
    height: 28px;
    width: 50px;
    margin: 4px 0;
}

.skeleton-small {
    height: 10px;
    width: 80px;
}

.skeleton-chart {
    height: 280px;
    width: 100%;
    border-radius: var(--db-radius-sm);
}

/* ── Toast notification ── */
.db-toast {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 9999;
    padding: 12px 20px;
    border-radius: var(--db-radius-sm);
    font-size: 0.8125rem;
    font-weight: 600;
    color: #fff;
    box-shadow: var(--db-shadow-lg);
    transform: translateY(20px);
    opacity: 0;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    align-items: center;
    gap: 8px;
}

.db-toast.show {
    transform: translateY(0);
    opacity: 1;
}

.db-toast.toast-error {
    background: linear-gradient(135deg, #ef4444, #dc2626);
}

.db-toast.toast-success {
    background: linear-gradient(135deg, #22c55e, #16a34a);
}

/* ═══════════════════════════════════════
   Responsive Tweaks
   ═══════════════════════════════════════ */
@media (max-width: 767.98px) {
    .dashboard-welcome {
        padding: 0.875rem 1.125rem;
    }

    .dashboard-welcome h4 {
        font-size: 1rem;
    }

    .kpi-card .kpi-value {
        font-size: 1.375rem;
    }

    .chart-detail-panel {
        width: 220px;
    }
}