/**
 * MACHPOWERTOOLS.COM - Dedicated Admin Dashboard Stylesheet (Design System v3)
 * High-Density Dark Slate Industrial Command Center
 * Self-Contained Vanilla CSS - Zero External Framework Dependencies
 */

:root {
    --bg-body: #070a12;
    --bg-sidebar: #0d1322;
    --bg-surface: #121a2d;
    --bg-surface-elevated: #18233c;
    --bg-surface-hover: #1e2c4a;
    --bg-input: #0b111e;
    
    --border-color: rgba(255, 255, 255, 0.08);
    --border-subtle: #1e293b;
    --border-focus: #38bdf8;
    
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --text-inverse: #070a12;
    
    --accent-primary: #38bdf8;
    --accent-primary-hover: #0ea5e9;
    --accent-primary-bg: rgba(56, 189, 248, 0.12);
    
    --accent-success: #10b981;
    --accent-success-hover: #059669;
    --accent-success-bg: rgba(16, 185, 129, 0.12);
    
    --accent-warning: #f59e0b;
    --accent-warning-bg: rgba(245, 158, 11, 0.12);
    
    --accent-danger: #ef4444;
    --accent-danger-hover: #dc2626;
    --accent-danger-bg: rgba(239, 68, 68, 0.12);
    
    --accent-purple: #8b5cf6;
    --accent-purple-bg: rgba(139, 92, 246, 0.12);

    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-full: 9999px;
    
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 10px 25px -5px rgba(0, 0, 0, 0.6);

    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    background-color: var(--bg-body);
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 13px;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

a {
    color: var(--accent-primary);
    text-decoration: none;
    transition: color 0.15s ease;
}
a:hover {
    color: var(--accent-primary-hover);
}

/* Layout Structure */
.admin-layout {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.admin-sidebar {
    width: 250px;
    background-color: var(--bg-sidebar);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    z-index: 100;
    transition: transform 0.25s ease;
}

.sidebar-brand {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 12px;
}

.brand-badge {
    width: 34px;
    height: 34px;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, #0284c7, #38bdf8);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-weight: 800;
    font-size: 16px;
    box-shadow: 0 2px 8px rgba(56, 189, 248, 0.3);
}

.brand-text h2 {
    font-size: 14px;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.3px;
}

.brand-text span {
    font-size: 10px;
    color: var(--accent-primary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 600;
    display: block;
}

.sidebar-nav {
    flex: 1;
    overflow-y: auto;
    padding: 12px 10px;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.nav-section-title {
    font-size: 10px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    color: var(--text-muted);
    padding: 12px 10px 4px 10px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 12.5px;
    transition: all 0.15s ease;
}

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

.nav-item.active {
    color: var(--accent-primary);
    background-color: var(--accent-primary-bg);
    font-weight: 600;
    border-left: 3px solid var(--accent-primary);
}

.nav-item .icon {
    font-size: 18px;
    color: var(--text-muted);
    transition: color 0.15s ease;
}

.nav-item:hover .icon,
.nav-item.active .icon {
    color: var(--accent-primary);
}

.nav-item .pill-badge {
    margin-left: auto;
    padding: 1px 6px;
    border-radius: var(--radius-full);
    font-size: 10px;
    font-weight: 700;
}

.sidebar-footer {
    padding: 12px 16px;
    border-top: 1px solid var(--border-color);
    background-color: rgba(0, 0, 0, 0.2);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.admin-profile {
    display: flex;
    align-items: center;
    gap: 10px;
    overflow: hidden;
}

.profile-avatar {
    width: 30px;
    height: 30px;
    border-radius: var(--radius-full);
    background: var(--bg-surface-elevated);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-primary);
    font-weight: bold;
    font-size: 12px;
}

.profile-info {
    overflow: hidden;
}

.profile-info strong {
    display: block;
    font-size: 11px;
    color: var(--text-primary);
    white-space: nowrap;
    text-overflow: ellipsis;
    overflow: hidden;
}

.profile-info span {
    display: block;
    font-size: 10px;
    color: var(--text-muted);
    font-family: var(--font-mono);
}

/* Main Content Area */
.admin-main {
    flex: 1;
    margin-left: 250px;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    min-width: 0;
}

/* Top Header Bar */
.admin-topbar {
    height: 56px;
    background-color: var(--bg-sidebar);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    position: sticky;
    top: 0;
    z-index: 90;
}

.topbar-left {
    display: flex;
    align-items: center;
    gap: 16px;
}

.breadcrumbs {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    color: var(--text-muted);
}
.breadcrumbs strong {
    color: var(--text-primary);
}

.topbar-right {
    display: flex;
    align-items: center;
    gap: 12px;
}

.system-telemetry {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 4px 10px;
    border-radius: var(--radius-sm);
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--text-secondary);
}

.status-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background-color: var(--accent-success);
    box-shadow: 0 0 6px var(--accent-success);
}

/* Main Container */
.admin-content {
    flex: 1;
    padding: 24px;
    max-width: 1400px;
    width: 100%;
    margin: 0 auto;
}

/* Page Header */
.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
    flex-wrap: wrap;
    gap: 12px;
}

.page-title h1 {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.3px;
}

.page-title p {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 2px;
}

.page-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Cards & Grid */
.grid-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.stat-card {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 16px;
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    transition: transform 0.15s ease, border-color 0.15s ease;
}
.stat-card:hover {
    border-color: var(--border-focus);
}

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

.stat-label {
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--text-muted);
    letter-spacing: 0.5px;
}

.stat-value {
    font-size: 22px;
    font-weight: 800;
    color: var(--text-primary);
    margin: 4px 0;
    font-family: var(--font-sans);
}

.stat-trend {
    font-size: 11px;
    display: flex;
    align-items: center;
    gap: 4px;
}
.stat-trend.positive { color: var(--accent-success); }
.stat-trend.warning { color: var(--accent-warning); }
.stat-trend.danger { color: var(--accent-danger); }

.stat-icon {
    width: 38px;
    height: 38px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
}
.stat-icon.blue { background-color: var(--accent-primary-bg); color: var(--accent-primary); }
.stat-icon.green { background-color: var(--accent-success-bg); color: var(--accent-success); }
.stat-icon.amber { background-color: var(--accent-warning-bg); color: var(--accent-warning); }
.stat-icon.red { background-color: var(--accent-danger-bg); color: var(--accent-danger); }
.stat-icon.purple { background-color: var(--accent-purple-bg); color: var(--accent-purple); }

/* Panels */
.panel {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    margin-bottom: 24px;
    overflow: hidden;
}

.panel-header {
    padding: 14px 18px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    background-color: rgba(255, 255, 255, 0.01);
}

.panel-title {
    font-size: 14px;
    font-weight: 700;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.panel-body {
    padding: 18px;
}

/* Tables */
.table-container {
    width: 100%;
    overflow-x: auto;
}

.admin-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-size: 12px;
}

.admin-table th {
    background-color: var(--bg-sidebar);
    color: var(--text-muted);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 10.5px;
    letter-spacing: 0.5px;
    padding: 10px 14px;
    border-bottom: 1px solid var(--border-color);
    white-space: nowrap;
}

.admin-table td {
    padding: 12px 14px;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-secondary);
    vertical-align: middle;
}

.admin-table tr:hover td {
    background-color: var(--bg-surface-hover);
    color: var(--text-primary);
}

.admin-table tr:last-child td {
    border-bottom: none;
}

.table-cell-title {
    font-weight: 600;
    color: var(--text-primary);
    display: block;
}

.table-cell-sub {
    font-size: 11px;
    color: var(--text-muted);
}

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 2px 8px;
    border-radius: var(--radius-full);
    font-size: 11px;
    font-weight: 600;
    text-transform: capitalize;
}

.badge-success { background-color: var(--accent-success-bg); color: var(--accent-success); border: 1px solid rgba(16, 185, 129, 0.3); }
.badge-warning { background-color: var(--accent-warning-bg); color: var(--accent-warning); border: 1px solid rgba(245, 158, 11, 0.3); }
.badge-danger { background-color: var(--accent-danger-bg); color: var(--accent-danger); border: 1px solid rgba(239, 68, 68, 0.3); }
.badge-info { background-color: var(--accent-primary-bg); color: var(--accent-primary); border: 1px solid rgba(56, 189, 248, 0.3); }
.badge-neutral { background-color: var(--bg-surface-elevated); color: var(--text-secondary); border: 1px solid var(--border-color); }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 7px 14px;
    border-radius: var(--radius-sm);
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    border: 1px solid transparent;
    transition: all 0.15s ease;
    text-decoration: none;
    font-family: inherit;
}

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

.btn-secondary {
    background-color: var(--bg-surface-elevated);
    border-color: var(--border-color);
    color: var(--text-primary);
}
.btn-secondary:hover {
    background-color: var(--bg-surface-hover);
    border-color: var(--text-muted);
}

.btn-success {
    background-color: var(--accent-success);
    color: #fff;
}
.btn-success:hover {
    background-color: var(--accent-success-hover);
}

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

.btn-sm {
    padding: 4px 8px;
    font-size: 11px;
}

.btn-icon {
    width: 30px;
    height: 30px;
    padding: 0;
    border-radius: var(--radius-sm);
}

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

.form-label {
    display: block;
    font-size: 11.5px;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.form-control {
    width: 100%;
    background-color: var(--bg-input);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    padding: 8px 12px;
    font-size: 12.5px;
    color: var(--text-primary);
    font-family: inherit;
    transition: border-color 0.15s ease;
}

.form-control:focus {
    outline: none;
    border-color: var(--border-focus);
    box-shadow: 0 0 0 2px var(--accent-primary-bg);
}

textarea.form-control {
    min-height: 80px;
    resize: vertical;
}

.form-row {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
}

.form-col {
    flex: 1;
    min-width: 180px;
}

/* Search and Filters Bar */
.filter-bar {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 16px;
    flex-wrap: wrap;
}

.search-input-wrapper {
    position: relative;
    flex: 1;
    min-width: 220px;
}

.search-input-wrapper input {
    width: 100%;
    padding-left: 32px;
}

.search-input-wrapper .search-icon {
    position: absolute;
    left: 10px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    pointer-events: none;
}

/* Modals */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease;
    padding: 16px;
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.modal-content {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 650px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
    transform: scale(0.96);
    transition: transform 0.2s ease;
}

.modal-overlay.active .modal-content {
    transform: scale(1);
}

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

.modal-header h3 {
    font-size: 15px;
    font-weight: 700;
    color: var(--text-primary);
}

.modal-close {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 20px;
    cursor: pointer;
}
.modal-close:hover {
    color: var(--text-primary);
}

.modal-body {
    padding: 20px;
}

.modal-footer {
    padding: 14px 20px;
    border-top: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 8px;
    background-color: rgba(0, 0, 0, 0.2);
}

/* Alerts */
.alert {
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    margin-bottom: 16px;
    font-size: 12.5px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.alert-success { background-color: var(--accent-success-bg); border: 1px solid rgba(16, 185, 129, 0.4); color: var(--accent-success); }
.alert-danger { background-color: var(--accent-danger-bg); border: 1px solid rgba(239, 68, 68, 0.4); color: var(--accent-danger); }
.alert-warning { background-color: var(--accent-warning-bg); border: 1px solid rgba(245, 158, 11, 0.4); color: var(--accent-warning); }
.alert-info { background-color: var(--accent-primary-bg); border: 1px solid rgba(56, 189, 248, 0.4); color: var(--accent-primary); }

/* Tabs */
.tabs-nav {
    display: flex;
    border-bottom: 1px solid var(--border-color);
    gap: 20px;
    margin-bottom: 20px;
}

.tab-btn {
    padding: 10px 4px;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-muted);
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    cursor: pointer;
    transition: all 0.15s ease;
}

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

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

.tab-pane {
    display: none;
}
.tab-pane.active {
    display: block;
}

/* Responsive */
@media (max-width: 1024px) {
    .admin-sidebar {
        transform: translateX(-100%);
    }
    .admin-sidebar.open {
        transform: translateX(0);
    }
    .admin-main {
        margin-left: 0;
    }
    .mobile-menu-toggle {
        display: block !important;
    }
}

.mobile-menu-toggle {
    display: none;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 22px;
    cursor: pointer;
}