:root {
    --monster-purple: #7C3AED;
    --monster-dark: #5B21B6;
    --monster-light: #A78BFA;
    --monster-green: #10B981;
    --monster-teal: #14B8A6;
    --monster-red: #EF4444;
    --monster-orange: #F97316;
    --accent-blue: #3B82F6;
    /* Map to iX classic-dark theme variables */
    --dark-bg: var(--theme-color-1, #0f1619);
    --dark-surface: var(--theme-color-2, #18262d);
    --dark-surface-2: var(--theme-color-3, #223240);
    --dark-border: var(--theme-color-soft-bdr, rgba(211, 236, 248, 0.4));
    --text-primary: var(--theme-color-std-text, #f0f6fc);
    --text-secondary: var(--theme-color-soft-text, #97bdd4);
    --text-muted: var(--theme-color-weak-text, #617d91);
    --gradient-primary: linear-gradient(135deg, #7C3AED 0%, #10B981 100%);
    --gradient-secondary: linear-gradient(135deg, #5B21B6 0%, #14B8A6 100%);
    --card-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.2);
}

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

body {
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Main content area (layout handled by ix-application) */
.main-content {
    padding: 2rem;
    min-height: 100vh;
    box-sizing: border-box;
    overflow-y: auto;
}

.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    padding: 2rem;
    box-sizing: border-box;
    background: linear-gradient(180deg, rgba(124, 58, 237, 0.1) 0%, transparent 100%);
}

.login-card {
    background: var(--dark-surface);
    border: 1px solid var(--dark-border);
    border-radius: 16px;
    padding: 3rem;
    max-width: 400px;
    width: 100%;
    margin: 0 auto;
    box-shadow: var(--card-shadow);
    backdrop-filter: blur(10px);
}

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

.login-header img {
    height: 60px;
    margin-bottom: 1rem;
}

.login-header h1 {
    font-size: 1.75rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
}

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

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    background: var(--dark-bg);
    border: 1px solid var(--dark-border);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 1rem;
    transition: border-color 0.3s, box-shadow 0.3s;
}

.form-control:focus {
    outline: none;
    border-color: var(--monster-purple);
    box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.1);
}

.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    width: 100%;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(124, 58, 237, 0.3);
}

.btn-secondary {
    background: var(--dark-surface-2);
    color: var(--text-primary);
    border: 1px solid var(--dark-border);
}

.btn-secondary:hover {
    background: var(--dark-border);
}

.btn-small {
    padding: 0.5rem 1rem;
    font-size: 0.85rem;
    white-space: nowrap;
}

/* Compact action buttons (shared across pages) */
.btn-action {
    padding: 0.4rem 0.8rem;
    border: none;
    border-radius: 6px;
    font-size: 0.7rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    background: #3a3f4b;
    color: #fff;
    line-height: 1;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.35rem;
    min-height: 30px;
}
.btn-action.btn-edit { background: var(--accent-blue); }
.btn-action.btn-delete { background: #dc2626; }
.btn-action.btn-visual { background: var(--monster-teal); }
.btn-action:hover { transform: translateY(-1px); opacity: 0.9; }
.btn-action:active { transform: translateY(0); }

/* Icon-only square buttons */
.btn-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    padding: 0;
    border: none;
    border-radius: 8px;
    background: var(--dark-surface-2);
    border: 1px solid var(--dark-border);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 0.95rem;
}
.btn-icon:hover { background: var(--dark-border); color: var(--text-primary); transform: translateY(-2px); }
.btn-icon:active { transform: translateY(0); }
.btn-icon.small { width:32px; height:32px; }

/* Contextual icon color variants */
.btn-icon.btn-view { color: var(--monster-purple); }
.btn-icon.btn-play { color: var(--monster-green); }
.btn-icon.btn-pause { color: var(--monster-orange); }
.btn-icon.btn-cert { color: var(--accent-blue); }
.btn-icon.btn-delete {
    color: #ef4444; /* icon color */
    background: transparent;
    border: 1px solid rgba(239,68,68,0.55);
}
.btn-icon.btn-delete:hover {
    background: rgba(239,68,68,0.12);
    color: #f87171;
    border-color: rgba(239,68,68,0.75);
}
.btn-icon.btn-delete:active {
    background: rgba(239,68,68,0.22);
    color: #fca5a5;
}


.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

.alert {
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 1rem;
    font-weight: 500;
}

.alert-error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.2);
    color: #FECACA;
}

.alert-success {
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.2);
    color: #A7F3D0;
}

.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.metric-card {
    background: var(--dark-surface);
    border: 1px solid var(--dark-border);
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: var(--card-shadow);
    position: relative;
    overflow: hidden;
}

.metric-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
}

.metric-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
}

.metric-title {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

.metric-icon {
    width: 24px;
    height: 24px;
    background: var(--gradient-primary);
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
}

.metric-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.metric-label {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.metric-trend {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    font-size: 0.75rem;
    margin-top: 0.5rem;
}

.trend-up {
    color: var(--monster-green);
}

.trend-down {
    color: var(--monster-red);
}

.chart-container {
    background: var(--dark-surface);
    border: 1px solid var(--dark-border);
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: var(--card-shadow);
    margin-bottom: 2rem;
    height: 400px; /* Fixed height for charts */
}

.chart-container canvas {
    max-height: 300px !important; /* Ensure charts don't exceed this height */
}

.chart-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.chart-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
}

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

.chart-controls button {
    padding: 0.5rem 0.75rem;
    background: var(--dark-bg);
    border: 1px solid var(--dark-border);
    border-radius: 6px;
    color: var(--text-secondary);
    font-size: 0.75rem;
    cursor: pointer;
    transition: all 0.3s;
}

.chart-controls button.active,
.chart-controls button:hover {
    background: var(--monster-purple);
    color: white;
    border-color: var(--monster-purple);
}

.status-indicator {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
}

.status-online {
    background: rgba(16, 185, 129, 0.1);
    color: var(--monster-green);
    border: 1px solid rgba(16, 185, 129, 0.2);
}

.status-offline {
    background: rgba(239, 68, 68, 0.1);
    color: var(--monster-red);
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.status-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: currentColor;
}

.data-table {
    background: var(--dark-surface);
    border: 1px solid var(--dark-border);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--card-shadow);
}

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

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

.data-table th {
    background: var(--dark-bg);
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

.data-table tbody tr:hover {
    background: rgba(124, 58, 237, 0.05);
}

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

.loading-spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid var(--dark-border);
    border-radius: 50%;
    border-top-color: var(--monster-purple);
    animation: spin 1s ease-in-out infinite;
}

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

.page-header {
    margin-bottom: 2rem;
}

.page-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.page-subtitle {
    color: var(--text-secondary);
    font-size: 1rem;
}

@media (max-width: 768px) {
    .nav-links {
        gap: 1rem;
    }

    .nav-links a {
        padding: 0.5rem;
        font-size: 0.875rem;
    }

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

    .login-card {
        padding: 2rem;
        margin: 1rem;
    }
}

/* =============================
     Global Dark Scrollbar Styling
     Option A: Apply everywhere
     ============================= */
/* WebKit browsers (Chrome, Safari, Edge) */
::-webkit-scrollbar {
    width: 12px;
    height: 12px;
}
::-webkit-scrollbar-track {
    background: var(--dark-surface);
}
::-webkit-scrollbar-thumb {
    background: var(--dark-surface-2);
    border-radius: 6px;
    border: 3px solid var(--dark-surface); /* creates padding */
}
::-webkit-scrollbar-thumb:hover {
    background: var(--dark-border);
}
::-webkit-scrollbar-thumb:active {
    background: var(--monster-purple);
}

/* Firefox */
* {
    scrollbar-width: thin; /* auto | thin | none */
    scrollbar-color: var(--dark-surface-2) var(--dark-surface); /* thumb track */
}

/* Optional: overlay scrollbars on macOS can appear translucent; force solid background for consistency */
body::-webkit-scrollbar-track {
    background: var(--dark-surface);
}
body::-webkit-scrollbar-thumb {
    background: var(--dark-surface-2);
}
/* MQTT Protocol Version Badges */
.protocol-badge {
    display: inline-block;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
    white-space: nowrap;
}

.protocol-v5 {
    background: linear-gradient(135deg, var(--monster-purple) 0%, #9333ea 100%);
    color: white;
    box-shadow: 0 2px 4px rgba(124, 58, 237, 0.2);
}

.protocol-v3 {
    background: rgba(59, 130, 246, 0.15);
    color: #60a5fa;
    border: 1px solid rgba(59, 130, 246, 0.3);
}

/* MQTT v5 Subscription Option Badges */
.sub-option-badge {
    display: inline-block;
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    font-size: 0.7rem;
    font-weight: 500;
    margin-right: 0.25rem;
    white-space: nowrap;
}

.sub-no-local {
    background: rgba(239, 68, 68, 0.15);
    color: #fca5a5;
    border: 1px solid rgba(239, 68, 68, 0.3);
}

.sub-retain-handling {
    background: rgba(59, 130, 246, 0.15);
    color: #93c5fd;
    border: 1px solid rgba(59, 130, 246, 0.3);
}

.sub-rap {
    background: rgba(124, 58, 237, 0.15);
    color: #c4b5fd;
    border: 1px solid rgba(124, 58, 237, 0.3);
}

/* MQTT v5 Metric Card Highlight */
.mqtt5-metric {
    background: linear-gradient(135deg, rgba(124, 58, 237, 0.05) 0%, rgba(147, 51, 234, 0.05) 100%);
    border: 1px solid rgba(124, 58, 237, 0.2);
}

.mqtt5-metric .metric-icon {
    background: linear-gradient(135deg, var(--monster-purple) 0%, #9333ea 100%);
}

.mqtt5-metric .metric-title {
    color: var(--monster-purple);
    font-weight: 600;
}

/* =============================
   Read-only / Guest Mode
   Hide all write-action controls when body has .read-only-mode
   ============================= */
.read-only-mode [data-requires-auth] {
    display: none !important;
}