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

:root {
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-tertiary: #f0f1f3;
    --bg-card: #ffffff;
    --border-color: rgba(0, 0, 0, 0.08);
    --text-primary: #111111;
    --text-secondary: #555555;
    --text-muted: #888888;
    --accent-primary: #111111;
    --accent-secondary: #333333;
    --success: #22c55e;
    --warning: #eab308;
    --error: #ef4444;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.1);
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-secondary);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
}

.app {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Header */
.header {
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 2rem;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
}

.logo-icon {
    font-size: 1.5rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s ease;
    background: var(--bg-primary);
    color: var(--text-primary);
}

.btn-primary {
    background: var(--accent-primary);
    color: white;
    border-color: var(--accent-primary);
}

.btn-primary:hover {
    background: var(--accent-secondary);
    border-color: var(--accent-secondary);
}

/* Main Content */
.main {
    flex: 1;
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem;
    width: 100%;
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.25rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    box-shadow: var(--shadow-sm);
    transition: box-shadow 0.15s ease;
}

.stat-card:hover {
    box-shadow: var(--shadow-md);
}

.stat-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
}

.stat-content {
    display: flex;
    flex-direction: column;
}

.stat-value {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

/* Tabs */
.tabs {
    display: flex;
    gap: 0.25rem;
    margin-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.tab {
    padding: 0.75rem 1.25rem;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-family: inherit;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s ease;
    border-bottom: 2px solid transparent;
    margin-bottom: -1px;
}

.tab:hover {
    color: var(--text-primary);
}

.tab.active {
    color: var(--text-primary);
    border-bottom-color: var(--accent-primary);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
    animation: fadeIn 0.2s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

/* Panel */
.panel {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--border-color);
    flex-wrap: wrap;
    gap: 1rem;
}

.panel-header h2 {
    font-size: 1rem;
    font-weight: 600;
}

.filters {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

/* Inputs */
.search-input,
.filter-select {
    padding: 0.5rem 0.75rem;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.875rem;
    transition: border-color 0.15s ease;
}

.search-input {
    min-width: 180px;
}

.search-input:focus,
.filter-select:focus {
    outline: none;
    border-color: var(--accent-primary);
}

.filter-select {
    cursor: pointer;
}

/* Table */
.table-container {
    overflow-x: auto;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table th,
.data-table td {
    padding: 0.875rem 1.25rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.data-table th {
    background: var(--bg-tertiary);
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
}

.data-table td {
    font-size: 0.875rem;
}

.data-table tbody tr {
    transition: background 0.1s ease;
}

.data-table tbody tr:hover {
    background: var(--bg-tertiary);
}

.data-table .loading {
    text-align: center;
    color: var(--text-muted);
    padding: 2rem;
}

/* Status badges */
.badge {
    display: inline-block;
    padding: 0.2rem 0.6rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 500;
}

.badge-success {
    background: rgba(34, 197, 94, 0.1);
    color: var(--success);
}

.badge-warning {
    background: rgba(234, 179, 8, 0.1);
    color: var(--warning);
}

.badge-error {
    background: rgba(239, 68, 68, 0.1);
    color: var(--error);
}

.badge-info {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
}

/* Pagination */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem;
    border-top: 1px solid var(--border-color);
}

.pagination button {
    padding: 0.4rem 0.75rem;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.15s ease;
}

.pagination button:hover:not(:disabled) {
    background: var(--accent-primary);
    color: white;
    border-color: var(--accent-primary);
}

.pagination button:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.pagination span {
    color: var(--text-secondary);
    font-size: 0.8rem;
}

/* User ID styling */
.user-id {
    font-family: 'SF Mono', 'Monaco', 'Consolas', monospace;
    font-size: 0.75rem;
    color: var(--text-muted);
    max-width: 140px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.details-text {
    max-width: 280px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* Footer */
.footer {
    text-align: center;
    padding: 1.25rem;
    color: var(--text-muted);
    font-size: 0.8rem;
    border-top: 1px solid var(--border-color);
    background: var(--bg-primary);
}

/* Responsive */
@media (max-width: 768px) {
    .header {
        padding: 1rem;
    }

    .main {
        padding: 1rem;
    }

    .panel-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .filters {
        width: 100%;
    }

    .search-input {
        width: 100%;
    }

    .data-table th,
    .data-table td {
        padding: 0.75rem 1rem;
    }
}

/* Animations */
@keyframes pulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.5;
    }
}

.loading {
    animation: pulse 1.5s ease-in-out infinite;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

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

::-webkit-scrollbar-thumb:hover {
    background: #999;
}