/* ainewz Admin — Design System v5 (Admin Panel Overhaul) */

/* ── Design Tokens ── */
:root {
    /* Layout */
    --sidebar-w: 240px;
    --sidebar-w-collapsed: 72px;
    --topbar-h: 56px;

    /* Backgrounds */
    --bg-page: #f4f5f8;
    --bg-card: #ffffff;
    --bg-tertiary: #f8fafc;
    --bg-elevated: #ffffff;

    /* Borders */
    --border: #e2e8f0;
    --border-hover: #cbd5e1;
    --border-active: #16a34a;

    /* Text */
    --text: #0f172a;
    --text-secondary: #475569;
    --text-muted: #64748b;

    /* Accent (brand green) */
    --accent: #89d957;
    --accent-muted: rgba(137, 217, 87, 0.2);

    /* Status colors (Requirement 10.4) */
    --status-green: #16a34a;
    --status-amber: #d97706;
    --status-red: #dc2626;

    /* Semantic aliases */
    --color-success: var(--status-green);
    --color-warning: var(--status-amber);
    --color-error: var(--status-red);
    --color-info: #3b82f6;

    /* Typography */
    --font: 'Inter', -apple-system, system-ui, sans-serif;
    --mono: 'SF Mono', 'Menlo', monospace;
    --text-xs: 0.7rem;
    --text-sm: 0.8rem;
    --text-md: 0.875rem;
    --text-lg: 1rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;

    /* Spacing */
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 20px;
    --space-6: 24px;
    --space-8: 32px;

    /* Radii */
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;

    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.02);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.1);
    --shadow-dropdown: 0 4px 12px rgba(0, 0, 0, 0.05);

    /* Transitions */
    --transition: 0.15s ease;
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body {
    font-family: var(--font);
    background: var(--bg-page);
    color: var(--text);
    line-height: 1.5;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

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

/* ── Sidebar ── */
.sidebar {
    width: var(--sidebar-w);
    background: var(--bg-card);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 100;
    border-right: 1px solid var(--border);
    box-shadow: 2px 0 8px rgba(0, 0, 0, 0.02);
    transition: width var(--transition);
}
.sidebar.collapsed { width: var(--sidebar-w-collapsed); }

/* Sidebar Brand */
.sidebar-brand {
    display: flex;
    align-items: center;
    padding: 24px 20px;
    gap: 12px;
}
.brand-logo-img {
    width: 32px;
    height: 32px;
    border-radius: 6px;
    object-fit: contain;
    filter: drop-shadow(0 0 4px rgba(137, 217, 87, 0.5));
}
.brand-text {
    display: flex;
    flex-direction: column;
    white-space: nowrap;
    overflow: hidden;
    opacity: 1;
    transition: opacity var(--transition);
}
.brand-name { font-size: 1.1rem; font-weight: 800; letter-spacing: -0.02em; color: var(--text); }
.brand-sub { font-size: 0.65rem; text-transform: uppercase; letter-spacing: 0.1em; color: var(--text-muted); font-weight: 600; }
.sidebar.collapsed .brand-text { display: none; }

/* Sidebar Toggle */
.sidebar-toggle {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 4px;
    margin-left: auto;
    border-radius: 4px;
    transition: all var(--transition);
}
.sidebar-toggle:hover { color: var(--text); background: var(--bg-tertiary); }
.sidebar.collapsed .sidebar-toggle svg { transform: rotate(180deg); }

/* Sidebar Navigation */
.sidebar-nav {
    flex: 1;
    padding: 12px;
    display: flex;
    flex-direction: column;
    gap: 4px;
    overflow-y: auto;
    overflow-x: hidden;
}
.nav-group-label {
    font-size: 0.65rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-muted);
    padding: 16px 12px 6px;
    user-select: none;
    white-space: nowrap;
}
.sidebar.collapsed .nav-group-label { opacity: 0; height: 12px; padding: 0; overflow: hidden; }

.nav-item {
    display: flex;
    align-items: center;
    width: 100%;
    height: 40px;
    padding: 0 12px;
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    text-decoration: none;
    transition: all var(--transition);
    position: relative;
    gap: 12px;
    white-space: nowrap;
    cursor: pointer;
}
.nav-item:hover { background: var(--bg-tertiary); color: var(--text); }
.nav-item.active { color: var(--text); background: var(--bg-tertiary); font-weight: 600; }
.nav-item.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    height: 24px;
    width: 4px;
    background: var(--status-green);
    border-radius: 0 4px 4px 0;
}
.nav-icon {
    font-size: 1.1rem;
    flex-shrink: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 20px;
}
.nav-icon svg { width: 16px; height: 16px; stroke-width: 2.5; }
.nav-text { opacity: 1; transition: opacity var(--transition); }
.sidebar.collapsed .nav-text { display: none; }

/* Tooltip for collapsed sidebar */
.nav-item[data-tooltip]::after {
    content: attr(data-tooltip);
    position: absolute;
    left: 100%;
    top: 50%;
    transform: translateY(-50%) translateX(10px);
    background: var(--text);
    color: #fff;
    padding: 4px 10px;
    border-radius: 4px;
    font-size: var(--text-xs);
    font-weight: 600;
    opacity: 0;
    pointer-events: none;
    transition: all var(--transition);
    white-space: nowrap;
    z-index: 200;
    box-shadow: var(--shadow-md);
}
.sidebar.collapsed .nav-item[data-tooltip]:hover::after { opacity: 1; transform: translateY(-50%) translateX(14px); }
.sidebar:not(.collapsed) .nav-item[data-tooltip]::after { display: none; }

/* Sidebar Footer */
.sidebar-footer {
    padding: 16px;
    border-top: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
}
.sidebar-user { display: flex; align-items: center; gap: 10px; }
.sidebar-avatar { width: 28px; height: 28px; border-radius: 50%; object-fit: cover; }
.sidebar-user-info { display: flex; flex-direction: column; overflow: hidden; }
.sidebar-user-name { font-size: var(--text-xs); font-weight: 600; color: var(--text); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 120px; }
.sidebar-user-role { font-size: 0.6rem; color: var(--text-muted); }
.sidebar-footer-actions { display: flex; align-items: center; gap: 12px; }
.env-badge { font-size: 0.6rem; font-weight: 700; letter-spacing: 0.08em; color: var(--text); background: var(--accent); padding: 3px 8px; border-radius: 4px; }
.sidebar.collapsed .env-badge { display: none; }
.sidebar.collapsed .sidebar-user-info { display: none; }
.btn-sidebar-logout { font-size: 0.85rem; color: var(--text-muted); background: transparent; border: none; cursor: pointer; transition: color var(--transition); }
.btn-sidebar-logout:hover { color: var(--status-red); }

/* ── Main Content ── */
.main {
    flex: 1;
    margin-left: var(--sidebar-w);
    display: flex;
    flex-direction: column;
    transition: margin-left var(--transition);
}
.sidebar.collapsed ~ .main { margin-left: var(--sidebar-w-collapsed); }

/* Topbar */
.topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px var(--space-8);
    background: rgba(244, 245, 248, 0.9);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 50;
    height: var(--topbar-h);
    gap: 16px;
}
.topbar h1 { font-size: var(--text-lg); font-weight: 700; color: var(--text); white-space: nowrap; }
.topbar-actions { display: flex; align-items: center; gap: var(--space-4); }
.status-indicator { display: flex; align-items: center; gap: 6px; }
.status-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--text-muted); }
.status-dot.online { background: var(--status-green); box-shadow: 0 0 6px rgba(22, 163, 74, 0.4); }
.status-dot.warning { background: var(--status-amber); box-shadow: 0 0 6px rgba(217, 119, 6, 0.4); }
.status-dot.error { background: var(--status-red); box-shadow: 0 0 6px rgba(220, 38, 38, 0.4); }
.status-text { font-size: var(--text-xs); color: var(--text-secondary); font-weight: 500; }

/* Page Content Area */
.page-content {
    flex: 1;
    padding: var(--space-6) var(--space-8);
    max-width: 1400px;
    width: 100%;
    margin: 0 auto;
}
.page { display: none; }
.page.active { display: block; animation: fadeIn 0.2s ease; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(5px); } to { opacity: 1; transform: translateY(0); } }

/* ── Buttons ── */
.btn {
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    font-family: var(--font);
    font-size: var(--text-sm);
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: all var(--transition);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
}
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-primary { background: var(--status-green); color: #fff; }
.btn-primary:hover:not(:disabled) { background: #15803d; box-shadow: 0 4px 12px rgba(22, 163, 74, 0.2); }
.btn-accent { background: var(--text); color: #fff; }
.btn-accent:hover:not(:disabled) { background: #000; box-shadow: var(--shadow-md); }
.btn-outline { background: var(--bg-card); color: var(--text-secondary); border: 1px solid var(--border); }
.btn-outline:hover:not(:disabled) { border-color: var(--text); color: var(--text); }
.btn-danger { background: var(--status-red); color: #fff; }
.btn-danger:hover:not(:disabled) { background: #b91c1c; }

/* ── Inputs ── */
.input-light {
    font-family: var(--font);
    font-size: var(--text-sm);
    padding: 8px 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--bg-card);
    color: var(--text);
    transition: all var(--transition);
}
.input-light:focus { outline: none; border-color: var(--status-green); box-shadow: 0 0 0 2px rgba(22, 163, 74, 0.1); }

/* ── Grids ── */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-4); margin-bottom: var(--space-6); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-4); margin-bottom: var(--space-6); }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-4); margin-bottom: var(--space-6); }
.grid-5 { display: grid; grid-template-columns: repeat(5, 1fr); gap: var(--space-4); margin-bottom: var(--space-6); }
.grid-6 { display: grid; grid-template-columns: repeat(6, 1fr); gap: var(--space-4); margin-bottom: var(--space-6); }

/* ── Stat Cards ── */
.stats-grid { display: grid; gap: var(--space-4); margin-bottom: var(--space-6); }
.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 4px;
    transition: border-color var(--transition), box-shadow var(--transition);
    box-shadow: var(--shadow-sm);
}
.stat-card:hover { border-color: var(--border-hover); box-shadow: var(--shadow-md); }
.stat-value { font-size: var(--text-2xl); font-weight: 800; color: var(--text); line-height: 1.1; letter-spacing: -0.02em; }
.stat-label { font-size: var(--text-xs); color: var(--text-muted); font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em; margin-top: 4px; }
.stat-body { display: flex; flex-direction: column; gap: 2px; }

/* ── Charts ── */
.chart-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: var(--space-5);
    box-shadow: var(--shadow-sm);
}
.chart-card h3 { font-size: var(--text-xs); text-transform: uppercase; letter-spacing: 0.06em; color: var(--text-muted); margin-bottom: var(--space-4); font-weight: 700; }
.chart-wrap { position: relative; height: 220px; }
.chart-wrap canvas { width: 100% !important; height: 100% !important; }

/* ── Data Tables ── */
.data-table { width: 100%; border-collapse: collapse; font-size: var(--text-sm); }
.data-table thead tr { background: var(--bg-tertiary); border-bottom: 1px solid var(--border); }
.data-table th { text-align: left; padding: 12px 16px; font-size: var(--text-xs); text-transform: uppercase; letter-spacing: 0.05em; color: var(--text-muted); font-weight: 700; }
.data-table td { padding: 14px 16px; border-bottom: 1px solid var(--border); color: var(--text-secondary); vertical-align: middle; }
.data-table tbody tr { transition: background var(--transition); }
.data-table tbody tr:hover { background: var(--bg-tertiary); }

/* ── Status Pills ── */
.status-pill { display: inline-flex; align-items: center; padding: 3px 10px; border-radius: 12px; font-size: var(--text-xs); font-weight: 700; }
.status-pill.success { background: #dcfce7; color: var(--status-green); }
.status-pill.warning { background: #fef3c7; color: var(--status-amber); }
.status-pill.error { background: #fee2e2; color: var(--status-red); }
.status-pill.neutral { background: #f1f5f9; color: #475569; }

/* ── Health Indicators ── */
.health-indicator { display: flex; align-items: center; gap: 8px; padding: 12px 16px; background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-md); cursor: pointer; transition: all var(--transition); }
.health-indicator:hover { border-color: var(--border-hover); box-shadow: var(--shadow-md); transform: translateY(-1px); }
.health-indicator .health-dot { width: 10px; height: 10px; border-radius: 50%; flex-shrink: 0; }
.health-indicator .health-dot.online { background: var(--status-green); box-shadow: 0 0 6px rgba(22, 163, 74, 0.4); }
.health-indicator .health-dot.warning { background: var(--status-amber); box-shadow: 0 0 6px rgba(217, 119, 6, 0.4); }
.health-indicator .health-dot.offline { background: var(--status-red); box-shadow: 0 0 6px rgba(220, 38, 38, 0.4); }
.health-indicator .health-dot.unknown { background: var(--text-muted); }
.health-indicator .health-label { font-size: var(--text-sm); font-weight: 600; color: var(--text); }
.health-indicator .health-detail { font-size: var(--text-xs); color: var(--text-muted); }

/* ── Glass Card ── */
.glass-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: var(--space-5);
    box-shadow: var(--shadow-sm);
}
.section-heading { display: flex; align-items: center; gap: 8px; font-size: var(--text-md); font-weight: 800; margin-bottom: var(--space-4); color: var(--text); }

/* ── Action Panels ── */
.action-panel { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-md); padding: var(--space-5); margin-bottom: var(--space-5); box-shadow: var(--shadow-sm); }
.action-panel.warning { border-color: var(--status-amber); background: #fffbeb; }
.action-panel.danger { border-color: var(--status-red); background: #fef2f2; }
.action-panel.success { border-color: var(--status-green); background: #f0fdf4; }

/* ── Toast ── */
.toast {
    position: fixed;
    bottom: 24px;
    right: 24px;
    background: var(--text);
    color: #fff;
    padding: 12px 24px;
    border-radius: var(--radius-md);
    font-size: var(--text-sm);
    font-weight: 600;
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.15);
    opacity: 0;
    transform: translateY(10px);
    transition: all 0.3s;
    z-index: 1000;
    pointer-events: none;
    max-width: 400px;
}
.toast.show { opacity: 1; transform: translateY(0); pointer-events: auto; }
.toast.success { background: var(--status-green); }
.toast.error { background: var(--status-red); }
.toast.warning { background: var(--status-amber); }

/* ── Spinner ── */
.spinner { width: 20px; height: 20px; border: 2px solid var(--border); border-top-color: var(--status-green); border-radius: 50%; animation: spin 0.8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ── Loading Overlay ── */
.loading-overlay { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; background: rgba(255, 255, 255, 0.7); backdrop-filter: blur(2px); border-radius: inherit; z-index: 10; }

/* ── Tab System ── */
.tab-bar { display: flex; gap: 8px; border-bottom: 1px solid var(--border); margin-bottom: var(--space-6); }
.tab-btn { padding: 12px 24px; font-family: var(--font); font-size: var(--text-sm); font-weight: 600; color: var(--text-muted); background: transparent; border: none; border-bottom: 2px solid transparent; cursor: pointer; transition: all var(--transition); }
.tab-btn:hover { color: var(--text); }
.tab-btn.active { color: var(--text); border-bottom-color: var(--status-green); }
.tab-panel { display: none; }
.tab-panel.active { display: block; animation: fadeIn 0.2s ease; }

/* ── Alert Banners ── */
.alert-banner { display: flex; align-items: center; gap: var(--space-4); padding: 12px 20px; border-radius: var(--radius-md); font-size: var(--text-sm); border: 1px solid; margin-bottom: var(--space-4); }
.alert-banner.success { background: #f0fdf4; border-color: var(--status-green); color: #15803d; }
.alert-banner.warning { background: #fffbeb; border-color: var(--status-amber); color: #92400e; }
.alert-banner.error { background: #fef2f2; border-color: var(--status-red); color: #991b1b; }
.alert-banner.info { background: #eff6ff; border-color: var(--color-info); color: #1e40af; }

/* ── Empty State ── */
.empty-state { padding: 64px 20px; text-align: center; color: var(--text-muted); background: var(--bg-tertiary); border-radius: var(--radius-md); border: 1px dashed var(--border-hover); }
.empty-state .empty-icon { font-size: 2.5rem; margin-bottom: 16px; }
.empty-state p { font-size: var(--text-sm); margin-bottom: 4px; }

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-hover); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* ── Mobile Menu ── */
.mobile-menu-btn { display: none; background: transparent; border: none; font-size: 1.3rem; cursor: pointer; color: var(--text); }

/* ── Responsive (Requirement 10.5, 10.7) ── */
/* Desktop: 1280px+ — no horizontal scroll */
@media (min-width: 1280px) {
    .page-content { max-width: 1400px; }
}

/* Tablet */
@media (max-width: 1024px) {
    .grid-2, .grid-3, .grid-4, .grid-5, .grid-6 { grid-template-columns: 1fr !important; }
}

/* Mobile: sidebar auto-closes at ≤768px (Requirement 10.7) */
@media (max-width: 768px) {
    .mobile-menu-btn { display: block !important; }

    .sidebar {
        transform: translateX(-100%);
        transition: transform var(--transition);
        box-shadow: var(--shadow-lg);
    }
    .sidebar.open { transform: translateX(0); }

    .main { margin-left: 0 !important; }

    .page-content { padding: 16px; }

    .topbar { padding: 12px 16px; }
}