:root {
    --ds-page-bg: radial-gradient(circle at 5% 10%, rgba(111, 107, 255, 0.12), transparent 45%),
        radial-gradient(circle at 90% 0%, rgba(243, 95, 141, 0.08), transparent 40%),
        #f4f5fb;
    --ds-content-bg: rgba(255, 255, 255, 0.95);
    --ds-card-radius: 18px;
    --ds-card-shadow: 0 18px 45px rgba(15, 23, 42, 0.08);
    --ds-border-soft: rgba(148, 163, 184, 0.25);
    --ds-text-primary: #0f172a;
    --ds-text-secondary: #475569;
    --ds-sidebar-width: 240px;
    --ds-nav-height: 64px;
    --ds-primary: #6366f1;
    --ds-gradient: linear-gradient(135deg, #6366f1, #8b5cf6);
    --ds-sidebar-bg: rgba(255, 255, 255, 0.9);
    --ds-sidebar-text: #475569;
    --ds-sidebar-active-bg: rgba(99, 102, 241, 0.12);
    --ds-sidebar-active-border: #6366f1;
    --ds-sidebar-hover-bg: rgba(99, 102, 241, 0.08);
    --ds-nav-shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
}

html.dashboard-shell,
body.dashboard-shell {
    overflow-x: hidden;
    width: 100%;
    max-width: 100%;
    position: relative;
}

body.dashboard-shell {
    margin: 0;
    min-height: 100vh;
    font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--ds-page-bg);
    color: var(--ds-text-primary);
}

.dashboard-nav {
    background: var(--ds-gradient) !important;
    height: var(--ds-nav-height);
    display: flex;
    align-items: center;
    box-shadow: var(--ds-nav-shadow);
    border-bottom: 1px solid rgba(255, 255, 255, 0.15);
}

.dashboard-nav .navbar-brand {
    font-weight: 700;
    letter-spacing: 0.02em;
}

.dashboard-nav .btn,
.dashboard-nav .dropdown-toggle {
    color: #fff !important;
}

.dashboard-page {
    display: flex;
    min-height: calc(100vh - var(--ds-nav-height));
}

.dashboard-sidebar {
    width: var(--ds-sidebar-width);
    background: var(--ds-sidebar-bg);
    backdrop-filter: blur(16px);
    padding: 24px 8px 24px 0.5rem;
    border-right: 1px solid var(--ds-border-soft);
    box-shadow: inset -1px 0 0 rgba(255, 255, 255, 0.3);
}

.dashboard-navlist {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.dashboard-navlist a {
    text-decoration: none;
    color: var(--ds-sidebar-text);
    padding: 12px 14px 12px 0.5rem;
    border-radius: 12px;
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 500;
    transition: all 0.2s ease;
}

.dashboard-navlist a:hover {
    background: var(--ds-sidebar-hover-bg);
    color: var(--ds-primary);
    transform: translateX(4px);
}

.dashboard-navlist a.active {
    background: var(--ds-sidebar-active-bg);
    color: var(--ds-primary);
    border: 1px solid rgba(99, 102, 241, 0.2);
    box-shadow: 0 10px 20px rgba(99, 102, 241, 0.12);
}

.dashboard-navlist a i {
    font-size: 1rem;
    width: 20px;
    text-align: center;
}

.dashboard-content {
    flex: 1;
    padding: 32px clamp(16px, 5vw, 48px);
    width: 100%;
    max-width: 100%;
    overflow-x: hidden;
}

.stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 18px;
}

.stat-card {
    border-radius: var(--ds-card-radius);
    background: var(--ds-content-bg);
    border: 1px solid var(--ds-border-soft);
    padding: 22px;
    box-shadow: var(--ds-card-shadow);
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    gap: 14px;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.stat-card::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0) 40%, rgba(255, 255, 255, 0.35));
    opacity: 0;
    transition: opacity 0.2s ease;
}

.stat-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 25px 60px rgba(15, 23, 42, 0.1);
}

.stat-card:hover::after {
    opacity: 1;
}

.stat-card .stat-icon {
    width: 56px;
    height: 56px;
    border-radius: 18px;
    background: rgba(99, 102, 241, 0.12);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--ds-primary);
}

.stat-card .stat-value {
    font-size: 28px;
    font-weight: 700;
}

.stat-card .stat-label {
    font-size: 13px;
    color: var(--ds-text-secondary);
}

.dashboard-card {
    border-radius: var(--ds-card-radius);
    background: var(--ds-content-bg);
    border: 1px solid var(--ds-border-soft);
    box-shadow: var(--ds-card-shadow);
    margin-bottom: 24px;
}

.dashboard-card .card-header {
    padding: 20px 28px;
    border-bottom: 1px solid var(--ds-border-soft);
    font-weight: 600;
    background: transparent;
}

.dashboard-card .card-body {
    padding: 24px 28px;
}

.dashboard-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
}

.dashboard-table thead {
    background: rgba(148, 163, 184, 0.12);
}

.dashboard-table th,
.dashboard-table td {
    padding: 14px 16px;
    text-align: left;
    border-bottom: 1px solid rgba(226, 232, 240, 0.8);
}

.dashboard-table tbody tr:hover {
    background: rgba(148, 163, 184, 0.08);
}

.status-chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 12px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 600;
}

.status-chip.success {
    background: rgba(16, 185, 129, 0.15);
    color: #059669;
}

.status-chip.warning {
    background: rgba(245, 158, 11, 0.15);
    color: #c2410c;
}

.status-chip.info {
    background: rgba(59, 130, 246, 0.15);
    color: #1d4ed8;
}

.status-chip.danger {
    background: rgba(239, 68, 68, 0.15);
    color: #b91c1c;
}

.dashboard-btn {
    border-radius: 999px;
    padding: 10px 20px;
    font-weight: 600;
    border: none;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.dashboard-btn.primary {
    background: var(--ds-gradient);
    color: #fff;
    box-shadow: 0 10px 25px rgba(99, 102, 241, 0.3);
}

.dashboard-btn.primary:hover {
    transform: translateY(-2px);
}

.dashboard-empty {
    text-align: center;
    padding: 60px 20px;
    color: var(--ds-text-secondary);
}

.dashboard-empty i {
    font-size: 48px;
    color: rgba(148, 163, 184, 0.8);
    margin-bottom: 12px;
}

@media (max-width: 992px) {
    .dashboard-page {
        flex-direction: column;
    }
    .dashboard-sidebar {
        width: 100%;
        display: flex;
        overflow-x: auto;
    }
    .dashboard-navlist {
        flex-direction: row;
        width: 100%;
        overflow-x: auto;
    }
    .dashboard-navlist a {
        flex: 1;
        justify-content: center;
    }
}

@media (max-width: 600px) {
    .dashboard-content {
        padding: 24px 16px;
        width: 100%;
        max-width: 100%;
        overflow-x: hidden;
    }
    .stat-grid {
        grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    }
    .dashboard-card .card-body,
    .dashboard-card .card-header {
        padding: 18px;
    }
}