:root {
    --sidebar-width: 250px;
    --sidebar-bg: #0f1923;
    --sidebar-hover: #1a2733;
    --sidebar-active: #1e3a50;
    --topbar-bg: #141e28;
    --body-bg: #0d1620;
    --card-bg: #141e28;
    --card-border: #1e2d3d;
    --text-primary: #e8edf2;
    --text-secondary: #8899aa;
    --accent: #00d26a;
    --accent-hover: #00b85c;
    --danger: #e74c3c;
}

* { box-sizing: border-box; }

body {
    background: var(--body-bg);
    color: var(--text-primary);
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    min-height: 100vh;
    margin: 0;
}

/* Auth Pages */
.auth-body {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #0d1620 0%, #1a2733 50%, #0f1923 100%);
}

.auth-container {
    width: 100%;
    max-width: 440px;
    padding: 1rem;
}

.auth-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    padding: 2.5rem;
    box-shadow: 0 8px 32px rgba(0,0,0,0.3);
}

.auth-card .logo {
    text-align: center;
    margin-bottom: 2rem;
}

.auth-card .logo h3 {
    color: var(--accent);
    font-weight: 700;
    margin: 0;
}

.auth-card .logo p {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-top: 0.25rem;
}

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

.sidebar-header {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--card-border);
}

.sidebar-header h5 {
    color: var(--text-primary);
    font-weight: 700;
    font-size: 1.1rem;
}

.sidebar-nav {
    padding: 0.5rem 0;
}

.sidebar-nav .nav-section {
    padding: 1rem 1.5rem 0.4rem;
    font-size: 0.7rem;
    font-weight: 700;
    color: var(--text-secondary);
    letter-spacing: 0.08em;
}

.sidebar-nav .nav-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.65rem 1.5rem;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.875rem;
    transition: all 0.15s;
    border-left: 3px solid transparent;
}

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

.sidebar-nav .nav-link.active {
    background: var(--sidebar-active);
    color: var(--accent);
    border-left-color: var(--accent);
}

.sidebar-nav .nav-link i {
    font-size: 1.1rem;
    width: 20px;
    text-align: center;
}

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

.top-navbar {
    background: var(--topbar-bg);
    border-bottom: 1px solid var(--card-border);
    padding: 0.75rem 1.5rem;
    display: flex;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 50;
}

.page-content {
    padding: 1.5rem;
}

/* Cards */
.stat-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 1.5rem;
    transition: transform 0.15s, box-shadow 0.15s;
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(0,0,0,0.2);
}

.stat-card .stat-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
}

.stat-card .stat-value {
    font-size: 1.75rem;
    font-weight: 700;
    margin: 0;
}

.stat-card .stat-label {
    color: var(--text-secondary);
    font-size: 0.8rem;
    margin: 0;
}

.panel-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    overflow: hidden;
}

.panel-card .card-header {
    background: transparent;
    border-bottom: 1px solid var(--card-border);
    padding: 1rem 1.5rem;
    font-weight: 600;
}

.panel-card .card-body {
    padding: 1.5rem;
}

/* Tables */
.table-dark-custom {
    --bs-table-bg: transparent;
    --bs-table-border-color: var(--card-border);
}

.table-dark-custom th {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    border-bottom-width: 1px;
}

.table-dark-custom td {
    vertical-align: middle;
    font-size: 0.875rem;
}

/* Forms */
.form-control, .form-select {
    background: #0d1620;
    border: 1px solid var(--card-border);
    color: var(--text-primary);
    border-radius: 8px;
    padding: 0.6rem 0.85rem;
}

.form-control:focus, .form-select:focus {
    background: #0d1620;
    border-color: var(--accent);
    color: var(--text-primary);
    box-shadow: 0 0 0 0.2rem rgba(0,210,106,0.15);
}

.form-label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 0.35rem;
}

/* Buttons */
.btn-accent {
    background: var(--accent);
    color: #000;
    font-weight: 600;
    border: none;
    border-radius: 8px;
    padding: 0.6rem 1.25rem;
}

.btn-accent:hover {
    background: var(--accent-hover);
    color: #000;
}

/* Status badges */
.badge-connected { background: rgba(0,210,106,0.15); color: #00d26a; }
.badge-disconnected { background: rgba(231,76,60,0.15); color: #e74c3c; }
.badge-connecting { background: rgba(241,196,15,0.15); color: #f1c40f; }
.badge-qr_pending { background: rgba(52,152,219,0.15); color: #3498db; }

.badge-immortal { background: rgba(231,76,60,0.15); color: #e74c3c; }
.badge-admin { background: rgba(52,152,219,0.15); color: #3498db; }
.badge-buyer { background: rgba(0,210,106,0.15); color: #00d26a; }

/* QR Code */
.qr-container {
    background: white;
    border-radius: 16px;
    padding: 2rem;
    display: inline-block;
}

.qr-container img {
    max-width: 280px;
    image-rendering: pixelated;
}

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

/* Animation */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.page-content {
    animation: fadeIn 0.3s ease;
}

/* Scrollbar */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--sidebar-bg); }
::-webkit-scrollbar-thumb { background: #2a3a4a; border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: #3a4a5a; }