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

:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --bg-dark: #0f0f1a;
    --bg-card: #1a1a2e;
    --bg-card-hover: #22223a;
    --text: #e2e8f0;
    --text-muted: #94a3b8;
    --success: #22c55e;
    --danger: #ef4444;
    --warning: #f59e0b;
    --border: #2d2d44;
    --gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #a855f7 100%);
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: var(--bg-dark);
    color: var(--text);
    min-height: 100vh;
}

.admin-layout {
    display: grid;
    grid-template-columns: 250px 1fr;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    background: var(--bg-card);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    padding: 20px 0;
}

.sidebar-header {
    padding: 0 20px 20px;
    border-bottom: 1px solid var(--border);
}

.sidebar-header h2 {
    font-size: 20px;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.sidebar-header span {
    font-size: 12px;
    color: var(--text-muted);
}

.sidebar-nav {
    flex: 1;
    padding: 20px 0;
}

.nav-item {
    display: block;
    padding: 12px 20px;
    color: var(--text-muted);
    text-decoration: none;
    transition: all 0.3s;
    border-left: 3px solid transparent;
}

.nav-item:hover, .nav-item.active {
    background: var(--bg-card-hover);
    color: var(--text);
    border-left-color: var(--primary);
}

.sidebar-footer {
    border-top: 1px solid var(--border);
    padding-top: 10px;
}

/* Main Content */
.main-content {
    padding: 30px;
    overflow-y: auto;
}

.tab {
    display: none;
}

.tab.active {
    display: block;
}

.tab-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

.tab-actions {
    display: flex;
    gap: 12px;
}

h1 {
    font-size: 28px;
    margin-bottom: 24px;
}

h2 {
    font-size: 20px;
    margin-bottom: 16px;
    color: var(--text-muted);
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: var(--bg-card);
    border-radius: 16px;
    padding: 24px;
    border: 1px solid var(--border);
    text-align: center;
}

.stat-card-icon {
    font-size: 32px;
    margin-bottom: 12px;
}

.stat-card-value {
    font-size: 36px;
    font-weight: 700;
    color: var(--primary-light);
}

.stat-card-label {
    color: var(--text-muted);
    margin-top: 8px;
}

/* Table */
.table-container {
    background: var(--bg-card);
    border-radius: 16px;
    border: 1px solid var(--border);
    overflow: hidden;
}

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

.data-table th,
.data-table td {
    padding: 14px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.data-table th {
    background: var(--bg-dark);
    font-weight: 600;
    color: var(--text-muted);
    font-size: 13px;
    text-transform: uppercase;
}

.data-table td {
    font-size: 14px;
}

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

.empty {
    text-align: center;
    color: var(--text-muted);
    padding: 40px !important;
}

.status-badge {
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

.status-active {
    background: rgba(34, 197, 94, 0.2);
    color: var(--success);
}

.status-inactive {
    background: rgba(239, 68, 68, 0.2);
    color: var(--danger);
}

.status-connected {
    background: rgba(34, 197, 94, 0.2);
    color: var(--success);
}

.status-disconnected {
    background: rgba(148, 163, 184, 0.2);
    color: var(--text-muted);
}

.status-connecting {
    background: rgba(245, 158, 11, 0.2);
    color: var(--warning);
}

.online-badge {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    margin-right: 6px;
}

.online-badge.online {
    background: var(--success);
}

.online-badge.offline {
    background: var(--text-muted);
}

/* Buttons */
.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 10px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

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

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
}

.btn-warning {
    background: var(--warning);
    color: #000;
}

.btn-danger {
    background: var(--danger);
    color: white;
}

.btn-secondary {
    background: var(--bg-dark);
    color: var(--text);
    border: 1px solid var(--border);
}

.btn-small {
    padding: 6px 12px;
    font-size: 12px;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--bg-card);
    border-radius: 20px;
    width: 90%;
    max-width: 500px;
    border: 1px solid var(--border);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px;
    border-bottom: 1px solid var(--border);
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 28px;
    cursor: pointer;
}

.modal-body {
    padding: 24px;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    padding: 16px 24px;
    border-top: 1px solid var(--border);
}

/* Forms */
.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    color: var(--text-muted);
    font-size: 13px;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 10px 14px;
    background: var(--bg-dark);
    border: 1px solid var(--border);
    border-radius: 10px;
    color: var(--text);
    font-size: 14px;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

@media (max-width: 1200px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .admin-layout {
        grid-template-columns: 1fr;
    }

    .sidebar {
        display: none;
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }
}