:root {
    --sidebar-width: 260px;
    --sidebar-bg: #2b2d31;
    --sidebar-color: #b0b3b8;
    --sidebar-active: #4a8fe7;
    --bg-primary: #1e1f22;
    --bg-secondary: #2b2d31;
    --bg-tertiary: #313338;
    --bg-card: #2b2d31;
    --text-primary: #e0e1e5;
    --text-secondary: #b0b3b8;
    --text-muted: #7a7c82;
    --border-color: #3a3c41;
    --link-color: #4a8fe7;
    --link-hover: #6aa3ed;
}

body {
    min-height: 100vh;
    background-color: var(--bg-primary);
    color: var(--text-primary);
}

/* Sidebar */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background-color: var(--sidebar-bg);
    color: var(--sidebar-color);
    overflow-y: auto;
    z-index: 1000;
    transition: transform 0.3s ease;
    border-right: 1px solid var(--border-color);
}

.sidebar .brand {
    padding: 1.25rem 1rem;
    border-bottom: 1px solid var(--border-color);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.sidebar .brand i {
    color: var(--sidebar-active);
}

.sidebar .nav-section {
    padding: 0.75rem 1rem 0.25rem;
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
}

.sidebar .nav-link {
    color: var(--sidebar-color);
    padding: 0.5rem 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    border-radius: 0;
    transition: background-color 0.15s, color 0.15s;
    text-decoration: none;
}

.sidebar .nav-link:hover {
    background-color: rgba(255,255,255,0.06);
    color: var(--text-primary);
}

.sidebar .nav-link.active {
    background-color: var(--sidebar-active);
    color: #fff;
}

.sidebar .nav-link i {
    width: 1.25rem;
    text-align: center;
}

/* Server group: collapsible header */
.sidebar .server-group-header {
    color: var(--sidebar-color);
    padding: 0.5rem 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.15s, color 0.15s;
    user-select: none;
    text-decoration: none;
    border: none;
    background: none;
    width: 100%;
    text-align: left;
}

.sidebar .server-group-header:hover {
    background-color: rgba(255,255,255,0.06);
    color: var(--text-primary);
}

.sidebar .server-group-header .chevron {
    margin-left: auto;
    font-size: 0.7rem;
    transition: transform 0.2s ease;
}

.sidebar .server-group-header.collapsed .chevron {
    transform: rotate(-90deg);
}

.sidebar .server-subnav .nav-link {
    padding-left: 2.75rem;
    font-size: 0.8125rem;
}

.sidebar .user-section {
    position: absolute;
    bottom: 0;
    width: 100%;
    padding: 0.75rem 1rem;
    border-top: 1px solid var(--border-color);
    background-color: var(--sidebar-bg);
}

.sidebar .user-section .username {
    font-size: 0.875rem;
    color: var(--text-primary);
}

.sidebar .user-section .user-links a {
    color: var(--sidebar-color);
    font-size: 0.75rem;
    text-decoration: none;
}

.sidebar .user-section .user-links a:hover {
    color: var(--text-primary);
}

/* Main content */
.main-content {
    margin-left: var(--sidebar-width);
    padding: 1.5rem;
    min-height: 100vh;
    background-color: var(--bg-primary);
}

.page-header {
    margin-bottom: 1.5rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--border-color);
}

.page-header h1 {
    font-size: 1.5rem;
    font-weight: 600;
    margin: 0;
    color: var(--text-primary);
}

/* Status indicators */
.status-dot {
    display: inline-block;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    margin-right: 0.25rem;
}

.status-dot.online { background-color: #43a047; }
.status-dot.offline { background-color: #e53935; }
.status-dot.unknown { background-color: var(--text-muted); }
.status-dot.checking {
    background-color: #ffb300;
    animation: pulse 1s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

/* Cards */
.card {
    border: 1px solid var(--border-color);
    box-shadow: 0 1px 3px rgba(0,0,0,0.2);
    margin-bottom: 1rem;
    background-color: var(--bg-card);
    color: var(--text-primary);
}

.card-header {
    background-color: var(--bg-tertiary);
    border-bottom: 1px solid var(--border-color);
    font-weight: 600;
    color: var(--text-primary);
}

.card-body {
    background-color: var(--bg-card);
}

/* Tables */
.table {
    color: var(--text-primary);
    --bs-table-bg: transparent;
    --bs-table-color: var(--text-primary);
    --bs-table-border-color: var(--border-color);
    --bs-table-striped-bg: rgba(255,255,255,0.03);
    --bs-table-hover-bg: rgba(255,255,255,0.05);
}

.table thead th {
    border-bottom-color: var(--border-color);
    color: var(--text-secondary);
    font-weight: 600;
}

.table td {
    border-color: var(--border-color);
}

/* DataTables overrides */
.dataTables_wrapper .dataTables_filter input {
    border-radius: 0.375rem;
    border: 1px solid var(--border-color);
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    padding: 0.25rem 0.5rem;
}

.dataTables_wrapper .dataTables_filter input:focus {
    border-color: var(--sidebar-active);
    outline: none;
    box-shadow: 0 0 0 2px rgba(74,143,231,0.25);
}

.dataTables_wrapper .dataTables_length select {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: 0.375rem;
}

.dataTables_wrapper .dataTables_info,
.dataTables_wrapper .dataTables_length label,
.dataTables_wrapper .dataTables_filter label {
    color: var(--text-secondary);
}

.dataTables_wrapper .dataTables_paginate .paginate_button {
    color: var(--text-secondary) !important;
}

.dataTables_wrapper .dataTables_paginate .paginate_button.current {
    background: var(--sidebar-active) !important;
    border-color: var(--sidebar-active) !important;
    color: #fff !important;
}

.dataTables_wrapper .dataTables_paginate .paginate_button:hover {
    background: var(--bg-tertiary) !important;
    border-color: var(--border-color) !important;
    color: var(--text-primary) !important;
}

/* Forms */
.form-control {
    background-color: var(--bg-tertiary);
    border-color: var(--border-color);
    color: var(--text-primary);
}

.form-control:focus {
    background-color: var(--bg-tertiary);
    border-color: var(--sidebar-active);
    color: var(--text-primary);
    box-shadow: 0 0 0 2px rgba(74,143,231,0.25);
}

.form-control::placeholder {
    color: var(--text-muted);
}

.form-label {
    color: var(--text-secondary);
}

.form-select {
    background-color: var(--bg-tertiary);
    border-color: var(--border-color);
    color: var(--text-primary);
}

.form-select:focus {
    background-color: var(--bg-tertiary);
    border-color: var(--sidebar-active);
    color: var(--text-primary);
    box-shadow: 0 0 0 2px rgba(74,143,231,0.25);
}

/* Alerts */
.alert {
    border: 1px solid var(--border-color);
}

.alert-success {
    background-color: rgba(67,160,71,0.15);
    border-color: rgba(67,160,71,0.3);
    color: #81c784;
}

.alert-danger {
    background-color: rgba(229,57,53,0.15);
    border-color: rgba(229,57,53,0.3);
    color: #ef9a9a;
}

.alert-warning {
    background-color: rgba(255,179,0,0.15);
    border-color: rgba(255,179,0,0.3);
    color: #ffe082;
}

.alert-info {
    background-color: rgba(74,143,231,0.15);
    border-color: rgba(74,143,231,0.3);
    color: #90caf9;
}

/* Responsive */
.sidebar-toggle {
    display: none;
    position: fixed;
    top: 0.75rem;
    left: 0.75rem;
    z-index: 1100;
    background: var(--sidebar-bg);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: 0.375rem;
    padding: 0.5rem 0.75rem;
    font-size: 1.25rem;
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }
    .sidebar.show {
        transform: translateX(0);
    }
    .main-content {
        margin-left: 0;
    }
    .sidebar-toggle {
        display: block;
    }
}

/* Table actions */
.btn-action {
    padding: 0.2rem 0.5rem;
    font-size: 0.8125rem;
}

/* Audit log */
.audit-result-success { color: #81c784; }
.audit-result-failure { color: #ef9a9a; }

/* Disabled rows */
.row-disabled { opacity: 0.55; }
.row-disabled td:first-child { text-decoration: line-through; }

/* Flash messages */
.flash-container {
    position: relative;
    z-index: 10;
}

/* Links */
a {
    color: var(--link-color);
}

a:hover {
    color: var(--link-hover);
}

/* Badge overrides for dark theme */
.badge.bg-secondary {
    background-color: var(--bg-tertiary) !important;
    color: var(--text-primary);
}

/* Modal overrides */
.modal-content {
    background-color: var(--bg-secondary);
    border-color: var(--border-color);
    color: var(--text-primary);
}

.modal-header {
    border-bottom-color: var(--border-color);
}

.modal-footer {
    border-top-color: var(--border-color);
}

.btn-close {
    filter: invert(1) grayscale(100%) brightness(200%);
}

/* Bootstrap text-muted / form-text override for dark theme */
.text-muted,
.form-text {
    color: var(--text-secondary) !important;
}

/* Login page container override */
.container {
    color: var(--text-primary);
}