:root {
    --primary: #0078d4;
    --primary-dark: #106ebe;
    --primary-light: #deecf9;
    --sidebar-bg: #1f2937;
    --sidebar-text: #9ca3af;
    --sidebar-hover: #374151;
    --sidebar-active: #0078d4;
    --body-bg: #f3f4f6;
    --card-bg: #ffffff;
    --text-primary: #111827;
    --text-secondary: #6b7280;
    --border: #e5e7eb;
    --success: #10b981;
    --success-light: #d1fae5;
    --warning: #f59e0b;
    --warning-light: #fef3c7;
    --danger: #ef4444;
    --danger-light: #fee2e2;
}

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

body {
    font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--body-bg);
    color: var(--text-primary);
    line-height: 1.5;
    font-size: 14px;
}

/* Login Page */
.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #1f2937 0%, #111827 100%);
    padding: 1rem;
}

.login-box {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 2.5rem;
    width: 100%;
    max-width: 400px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}

.login-header {
    text-align: center;
    margin-bottom: 2rem;
}

.login-logo {
    color: var(--primary);
    margin-bottom: 1rem;
}

.login-logo-image {
    width: 80px;
    height: 80px;
    border-radius: 18px;
    margin-bottom: 1rem;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.login-header h1 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.login-header p {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.login-error {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    background: var(--danger-light);
    color: #991b1b;
    border-radius: 6px;
    margin-bottom: 1rem;
    font-size: 0.875rem;
}

.btn-login {
    width: 100%;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    margin-top: 0.5rem;
}

.login-footer {
    text-align: center;
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border);
    color: var(--text-secondary);
    font-size: 0.75rem;
}

.spinner-small {
    width: 1rem;
    height: 1rem;
    border: 2px solid rgba(255,255,255,0.3);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.redirect-message {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    color: var(--text-secondary);
}

/* App Container */
.app-container {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: 260px;
    background: var(--sidebar-bg);
    color: var(--sidebar-text);
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    z-index: 100;
}

.sidebar-header {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo-icon {
    color: var(--primary);
}

.logo-image {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    object-fit: cover;
}

.sidebar-header h1 {
    font-size: 1.25rem;
    font-weight: 700;
    color: #fff;
    line-height: 1.2;
}

.sidebar-header .version {
    font-size: 0.7rem;
    opacity: 0.5;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.nav-menu {
    list-style: none;
    padding: 0.5rem 0;
    flex: 1;
    overflow-y: auto;
}

.nav-section {
    font-size: 0.65rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: rgba(255,255,255,0.4);
    padding: 1.25rem 1.5rem 0.5rem;
}

.nav-menu li a,
.nav-menu li > NavLink {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1.5rem;
    color: var(--sidebar-text);
    text-decoration: none;
    transition: all 0.15s ease;
    border-left: 3px solid transparent;
}

.nav-menu li a:hover,
.nav-menu li a.active {
    background: var(--sidebar-hover);
    color: #fff;
}

.nav-menu li a.active {
    background: rgba(0, 120, 212, 0.2);
    border-left-color: var(--primary);
    color: var(--primary);
}

.nav-menu li a svg {
    flex-shrink: 0;
    opacity: 0.7;
}

.nav-menu li a:hover svg,
.nav-menu li a.active svg {
    opacity: 1;
}

.sidebar-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid rgba(255,255,255,0.1);
    background: rgba(0,0,0,0.2);
}

.user-info {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
    font-size: 0.875rem;
    color: #fff;
}

.btn-logout {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    width: 100%;
    padding: 0.5rem 0.75rem;
    background: rgba(255,255,255,0.1);
    border: none;
    border-radius: 6px;
    color: var(--sidebar-text);
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.15s ease;
}

.btn-logout:hover {
    background: rgba(255,255,255,0.15);
    color: #fff;
}

/* Main Content */
.main-content {
    flex: 1;
    margin-left: 260px;
    padding: 1.5rem 2rem;
    min-height: 100vh;
}

/* Page Header */
.page-header {
    margin-bottom: 1.5rem;
}

.page-header h1 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

.page-header p {
    color: var(--text-secondary);
    margin-top: 0.125rem;
    font-size: 0.875rem;
}

/* Cards */
.card {
    background: var(--card-bg);
    border-radius: 8px;
    padding: 1.25rem;
    box-shadow: 0 1px 3px rgba(0,0,0,0.08);
    border: 1px solid var(--border);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--border);
}

.card-title {
    font-size: 1rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.stat-card {
    background: var(--card-bg);
    border-radius: 8px;
    padding: 1.25rem;
    box-shadow: 0 1px 3px rgba(0,0,0,0.08);
    border: 1px solid var(--border);
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.stat-icon svg {
    width: 24px;
    height: 24px;
}

.stat-card.success .stat-icon {
    background: var(--success-light);
    color: var(--success);
}

.stat-card.warning .stat-icon {
    background: var(--warning-light);
    color: var(--warning);
}

.stat-card.danger .stat-icon {
    background: var(--danger-light);
    color: var(--danger);
}

.stat-card.primary .stat-icon {
    background: var(--primary-light);
    color: var(--primary);
}

.stat-info {
    flex: 1;
}

.stat-value {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.2;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.8rem;
    margin-top: 0.125rem;
}

/* Tables */
.table-container {
    overflow-x: auto;
    margin: -0.25rem;
}

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

th, td {
    padding: 0.75rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

th {
    background: #f9fafb;
    font-weight: 600;
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

tbody tr:hover {
    background: #f9fafb;
}

tbody tr:last-child td {
    border-bottom: none;
}

/* Status Badges */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.25rem 0.625rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 500;
}

.badge-success {
    background: var(--success-light);
    color: #065f46;
}

.badge-warning {
    background: var(--warning-light);
    color: #92400e;
}

.badge-danger {
    background: var(--danger-light);
    color: #991b1b;
}

.badge-info {
    background: var(--primary-light);
    color: #1e40af;
}

/* Status Dot */
.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    display: inline-block;
}

.status-dot.online {
    background: var(--success);
    box-shadow: 0 0 0 2px var(--success-light);
}

.status-dot.offline {
    background: var(--danger);
    box-shadow: 0 0 0 2px var(--danger-light);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    border: 1px solid transparent;
    transition: all 0.15s ease;
    text-decoration: none;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-primary {
    background: var(--primary);
    color: #fff;
}

.btn-primary:hover:not(:disabled) {
    background: var(--primary-dark);
}

.btn-secondary {
    background: #fff;
    color: var(--text-primary);
    border-color: var(--border);
}

.btn-secondary:hover:not(:disabled) {
    background: #f9fafb;
    border-color: #d1d5db;
}

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

.btn-danger:hover:not(:disabled) {
    background: #dc2626;
}

.btn-sm {
    padding: 0.375rem 0.75rem;
    font-size: 0.8rem;
}

.btn-icon {
    padding: 0.5rem;
}

/* Forms */
.form-group {
    margin-bottom: 1rem;
}

.form-label {
    display: block;
    margin-bottom: 0.375rem;
    font-weight: 500;
    font-size: 0.875rem;
    color: var(--text-primary);
}

.form-input {
    width: 100%;
    padding: 0.625rem 0.875rem;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 0.875rem;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
    background: #fff;
}

.form-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(0, 120, 212, 0.1);
}

.form-input:disabled {
    background: #f9fafb;
    color: var(--text-secondary);
}

/* Modal */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 1rem;
}

.modal {
    background: var(--card-bg);
    border-radius: 12px;
    width: 100%;
    max-width: 480px;
    max-height: 90vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border);
}

.modal-title {
    font-size: 1.125rem;
    font-weight: 600;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-secondary);
    line-height: 1;
    padding: 0.25rem;
}

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

.modal-body {
    padding: 1.5rem;
    overflow-y: auto;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border);
    background: #f9fafb;
}

/* Alert Messages */
.alert {
    padding: 0.75rem 1rem;
    border-radius: 6px;
    font-size: 0.875rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.alert-success {
    background: var(--success-light);
    color: #065f46;
}

.alert-danger {
    background: var(--danger-light);
    color: #991b1b;
}

.alert-warning {
    background: var(--warning-light);
    color: #92400e;
}

/* Loading */
.loading {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 3rem;
    color: var(--text-secondary);
}

.spinner {
    width: 2rem;
    height: 2rem;
    border: 3px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* Empty State */
.empty-state {
    text-align: center;
    padding: 3rem 1.5rem;
    color: var(--text-secondary);
}

.empty-state svg {
    width: 48px;
    height: 48px;
    margin-bottom: 1rem;
    opacity: 0.5;
}

.empty-state p {
    margin: 0;
}

.empty-state p:first-of-type {
    font-weight: 500;
    color: var(--text-primary);
}

.empty-state p:last-of-type {
    font-size: 0.875rem;
    margin-top: 0.25rem;
}

/* Code */
code {
    font-family: 'SF Mono', Monaco, Consolas, 'Liberation Mono', monospace;
    font-size: 0.8rem;
    background: #f3f4f6;
    padding: 0.125rem 0.375rem;
    border-radius: 4px;
    color: #374151;
}

pre {
    background: #1f2937;
    color: #e5e7eb;
    padding: 1rem;
    border-radius: 6px;
    overflow-x: auto;
    font-family: 'SF Mono', Monaco, Consolas, 'Liberation Mono', monospace;
    font-size: 0.8rem;
    line-height: 1.6;
}

/* Grid Layout Helpers */
.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}

.flex-between {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

/* Responsive */
@media (max-width: 1024px) {
    .sidebar {
        width: 220px;
    }

    .main-content {
        margin-left: 220px;
        padding: 1rem 1.5rem;
    }
}

@media (max-width: 768px) {
    .sidebar {
        width: 64px;
    }

    .sidebar-header h1,
    .sidebar-header .version,
    .nav-menu li a span,
    .nav-section,
    .sidebar-footer .user-info span,
    .btn-logout span {
        display: none;
    }

    .logo-container {
        justify-content: center;
    }

    .logo-container > div {
        display: none;
    }

    .nav-menu li a {
        justify-content: center;
        padding: 0.875rem;
    }

    .sidebar-footer {
        padding: 0.75rem;
    }

    .user-info {
        justify-content: center;
    }

    .btn-logout {
        justify-content: center;
        padding: 0.625rem;
    }

    .btn-logout svg {
        margin: 0;
    }

    .main-content {
        margin-left: 64px;
        padding: 1rem;
    }

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

    .grid-2 {
        grid-template-columns: 1fr;
    }

    .user-role-badge {
        display: none;
    }
}

/* User Menu Item */
.user-menu-item {
    position: relative;
}

.user-role-badge {
    margin-left: auto;
    padding: 0.125rem 0.5rem;
    border-radius: 4px;
    font-size: 0.65rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.user-role-badge.admin {
    background: rgba(245, 158, 11, 0.2);
    color: #fbbf24;
}

.user-role-badge.user {
    background: rgba(59, 130, 246, 0.2);
    color: #60a5fa;
}

/* Logout Link */
.logout-link {
    color: var(--sidebar-text) !important;
}

.logout-link:hover {
    background: rgba(239, 68, 68, 0.15) !important;
    color: #f87171 !important;
}