:root {
    --bg-primary: #0a0e17;
    --bg-secondary: #111827;
    --bg-panel: #1a2035;
    --text-primary: #e2e8f0;
    --text-secondary: #94a3b8;
    --accent-blue: #3b82f6;
    --accent-green: #10b981;
    --accent-orange: #f59e0b;
    --accent-red: #ef4444;
    --border: #1e293b;
}

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

html, body, #app {
    width: 100%;
    height: 100%;
    overflow: hidden;
    font-family: 'Segoe UI', -apple-system, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
}

.loading-screen {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    gap: 1rem;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border);
    border-top-color: var(--accent-blue);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* Layout */
.app-layout {
    display: grid;
    grid-template-columns: 300px 1fr;
    grid-template-rows: 48px 1fr 40px;
    height: 100vh;
    gap: 1px;
    background: var(--border);
}

.top-bar {
    grid-column: 1 / -1;
    background: var(--bg-secondary);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1rem;
}

.top-bar h1 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--accent-blue);
}

.sidebar {
    background: var(--bg-secondary);
    /*overflow-y: auto;*/
    padding: 0.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.viewport {
    background: var(--bg-primary);
    position: relative;
    overflow: hidden;
}

.viewport canvas {
    width: 100% !important;
    height: 100% !important;
}

.status-bar {
    grid-column: 1 / -1;
    background: var(--bg-secondary);
    display: flex;
    align-items: center;
    padding: 0 1rem;
    font-size: 0.75rem;
    color: var(--text-secondary);
    gap: 1.5rem;
}

/* Panels */
.panel {
    background: var(--bg-panel);
    border-radius: 6px;
    padding: 0.75rem;
    border: 1px solid var(--border);
}

.panel-header {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    letter-spacing: 0.05em;
}

/* Object list */
.object-list {
    list-style: none;
    max-height: 300px;
    overflow-y: auto;
}

.object-list li {
    padding: 0.35rem 0.5rem;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.8rem;
    display: flex;
    justify-content: space-between;
}

.object-list li:hover {
    background: rgba(59, 130, 246, 0.15);
}

.object-list li.selected {
    background: rgba(59, 130, 246, 0.25);
    border-left: 2px solid var(--accent-blue);
}

/* Controls */
.btn {
    padding: 0.4rem 0.8rem;
    border: 1px solid var(--border);
    border-radius: 4px;
    background: var(--bg-panel);
    color: var(--text-primary);
    cursor: pointer;
    font-size: 0.8rem;
    transition: background 0.15s;
}

.btn:hover { background: var(--bg-secondary); }
.btn.active { background: var(--accent-blue); border-color: var(--accent-blue); }

.btn-group {
    display: flex;
    gap: 2px;
}

/* Time slider */
.time-slider {
    width: 100%;
}

.time-slider input[type="range"] {
    width: 100%;
    accent-color: var(--accent-blue);
}

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.15rem 0.4rem;
    border-radius: 3px;
    font-size: 0.7rem;
    font-weight: 600;
}

.badge-pending { background: rgba(245, 158, 11, 0.2); color: var(--accent-orange); }
.badge-confirmed { background: rgba(16, 185, 129, 0.2); color: var(--accent-green); }
.badge-none { background: rgba(148, 163, 184, 0.2); color: var(--text-secondary); }

/* SignalR status indicator */
.signal-indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    display: inline-block;
}

.signal-connected { background: var(--accent-green); }
.signal-disconnected { background: var(--accent-red); }
.signal-connecting { background: var(--accent-orange); animation: pulse 1s infinite; }

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}

/* Stats */
.stats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem;
}

.stat-item {
    text-align: center;
}

.stat-value {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--accent-blue);
}

.stat-label {
    font-size: 0.65rem;
    color: var(--text-secondary);
    text-transform: uppercase;
}

/* Category filter checkboxes */
.category-filter label {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.8rem;
    padding: 0.2rem 0;
    cursor: pointer;
}

/* Overlay panels in viewport */
.viewport-overlay {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    display: flex;
    gap: 0.5rem;
    z-index: 10;
}

/* Error UI */
#blazor-error-ui {
    background: var(--accent-red);
    color: white;
    padding: 0.5rem 1rem;
    position: fixed;
    bottom: 0;
    width: 100%;
    z-index: 1000;
    display: none;
}

#blazor-error-ui .reload, #blazor-error-ui .dismiss {
    color: white;
    margin-left: 1rem;
}