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

:root {
    --bg-primary: #0E1621;
    --bg-secondary: #17212B;
    --bg-tertiary: #242F3D;
    --accent: #5EBBEA;
    --accent-hover: #4AA8D8;
    --text-primary: #FFFFFF;
    --text-secondary: #8B9CAD;
    --text-muted: #6C7883;
    --border: #2B3E50;
    --success: #4CAF50;
    --warning: #FFB74D;
    --danger: #E05D5D;
    --sidebar-width: 260px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.5;
}

.hidden { display: none !important; }

/* Login Screen */
.login-screen {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.login-card {
    background: var(--bg-secondary);
    border-radius: 16px;
    padding: 40px;
    width: 100%;
    max-width: 400px;
    border: 1px solid var(--border);
}

.login-logo {
    text-align: center;
    margin-bottom: 32px;
}

.login-logo img {
    width: 80px;
    height: 80px;
    border-radius: 16px;
    margin-bottom: 16px;
}

.login-logo h1 {
    font-size: 24px;
    font-weight: 700;
    color: var(--accent);
    margin-bottom: 8px;
}

.login-logo p {
    color: var(--text-secondary);
    font-size: 14px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
}

.form-group input, .form-group select, .form-group textarea {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 14px;
    transition: border-color 0.2s;
}

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

.form-group textarea {
    min-height: 100px;
    resize: vertical;
}

.error-message {
    color: var(--danger);
    font-size: 13px;
    margin-bottom: 16px;
    display: none;
}

.error-message:not(:empty) {
    display: block;
}

.btn {
    padding: 12px 24px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: all 0.2s;
}

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

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

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

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

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

.btn-danger:hover {
    opacity: 0.9;
}

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

.btn-success:hover {
    opacity: 0.9;
}

.btn-block {
    width: 100%;
}

.btn-sm {
    padding: 8px 16px;
    font-size: 13px;
}

/* Admin Panel Layout */
.admin-panel {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background: var(--bg-secondary);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    z-index: 100;
}

.sidebar-header {
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 12px;
    border-bottom: 1px solid var(--border);
}

.sidebar-logo {
    width: 40px;
    height: 40px;
    border-radius: 10px;
}

.sidebar-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--accent);
}

.sidebar-nav {
    flex: 1;
    padding: 16px 12px;
    overflow-y: auto;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: 8px;
    margin-bottom: 4px;
    transition: all 0.2s;
}

.nav-link svg {
    width: 20px;
    height: 20px;
}

.nav-link:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.nav-link.active {
    background: var(--accent);
    color: white;
}

.sidebar-footer {
    padding: 16px;
    border-top: 1px solid var(--border);
}

.logout-btn {
    display: flex;
    align-items: center;
    gap: 12px;
    width: 100%;
    padding: 12px 16px;
    background: transparent;
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s;
}

.logout-btn svg {
    width: 20px;
    height: 20px;
}

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

/* Main Content */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    min-height: 100vh;
}

.main-header {
    padding: 20px 30px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 50;
}

.main-header h1 {
    font-size: 24px;
    font-weight: 600;
}

.header-user {
    color: var(--text-secondary);
    font-size: 14px;
}

.page-content {
    padding: 30px;
}

/* Stats Cards */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: var(--bg-secondary);
    border-radius: 12px;
    padding: 24px;
    border: 1px solid var(--border);
}

.stat-label {
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 8px;
}

.stat-value {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
}

.stat-value.accent { color: var(--accent); }
.stat-value.success { color: var(--success); }
.stat-value.warning { color: var(--warning); }
.stat-value.danger { color: var(--danger); }

/* Charts */
.charts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.chart-card {
    background: var(--bg-secondary);
    border-radius: 12px;
    padding: 24px;
    border: 1px solid var(--border);
}

.chart-title {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 20px;
}

.chart-container {
    height: 300px;
}

/* Tables */
.table-card {
    background: var(--bg-secondary);
    border-radius: 12px;
    border: 1px solid var(--border);
    overflow: hidden;
}

.table-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
}

.table-title {
    font-size: 18px;
    font-weight: 600;
}

.table-actions {
    display: flex;
    gap: 12px;
    align-items: center;
}

.search-input {
    padding: 10px 16px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 14px;
    min-width: 200px;
}

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

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

th, td {
    padding: 14px 24px;
    text-align: left;
}

th {
    background: var(--bg-tertiary);
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--text-muted);
    cursor: pointer;
}

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

td {
    border-bottom: 1px solid var(--border);
    font-size: 14px;
}

tr:hover td {
    background: rgba(94, 187, 234, 0.05);
}

.badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
}

.badge-success {
    background: rgba(76, 175, 80, 0.2);
    color: var(--success);
}

.badge-warning {
    background: rgba(255, 183, 77, 0.2);
    color: var(--warning);
}

.badge-danger {
    background: rgba(224, 93, 93, 0.2);
    color: var(--danger);
}

.badge-info {
    background: rgba(94, 187, 234, 0.2);
    color: var(--accent);
}

/* Pagination */
.pagination {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 24px;
    border-top: 1px solid var(--border);
}

.pagination-info {
    font-size: 13px;
    color: var(--text-muted);
}

.pagination-buttons {
    display: flex;
    gap: 8px;
}

.page-btn {
    padding: 8px 14px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 13px;
}

.page-btn:hover:not(:disabled) {
    background: var(--border);
    color: var(--text-primary);
}

.page-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

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

/* Modal */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 20px;
}

.modal {
    background: var(--bg-secondary);
    border-radius: 16px;
    width: 100%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
    border: 1px solid var(--border);
}

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

.modal-title {
    font-size: 18px;
    font-weight: 600;
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 24px;
    line-height: 1;
}

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

.modal-body {
    padding: 24px;
}

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

/* Tabs */
.tabs {
    display: flex;
    gap: 4px;
    margin-bottom: 24px;
    background: var(--bg-secondary);
    padding: 4px;
    border-radius: 10px;
    border: 1px solid var(--border);
}

.tab {
    padding: 10px 20px;
    background: transparent;
    border: none;
    border-radius: 6px;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.2s;
}

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

.tab.active {
    background: var(--accent);
    color: white;
}

/* User Detail */
.user-detail {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 24px;
}

.user-info-card {
    background: var(--bg-secondary);
    border-radius: 12px;
    padding: 24px;
    border: 1px solid var(--border);
}

.user-avatar {
    width: 80px;
    height: 80px;
    background: var(--accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    font-weight: 600;
    color: white;
    margin: 0 auto 16px;
}

.user-name {
    text-align: center;
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 4px;
}

.user-email {
    text-align: center;
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 20px;
}

.user-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

.user-stat {
    background: var(--bg-tertiary);
    padding: 12px;
    border-radius: 8px;
    text-align: center;
}

.user-stat-value {
    font-size: 20px;
    font-weight: 600;
    color: var(--accent);
}

.user-stat-label {
    font-size: 11px;
    color: var(--text-muted);
    margin-top: 4px;
}

/* Loading */
.loading {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 60px;
    color: var(--text-muted);
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Responsive */
@media (max-width: 1024px) {
    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s;
    }

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

    .main-content {
        margin-left: 0;
    }

    .user-detail {
        grid-template-columns: 1fr;
    }

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

@media (max-width: 768px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .table-header {
        flex-direction: column;
        align-items: stretch;
    }

    .search-input {
        width: 100%;
    }
}

/* Clickable table rows */
.clickable-row:hover {
  background-color: rgba(94, 187, 234, 0.1);
}

.clickable-row:hover td {
  color: var(--accent);
}