:root {
    /* Colors */
    --bg-primary: #0a0a0f;
    --bg-card: rgba(18, 18, 26, 0.7);
    --bg-card-hover: rgba(26, 26, 40, 0.85);
    
    --text-main: #f0f0f5;
    --text-muted: #8b8b9e;
    
    --border-subtle: rgba(255, 255, 255, 0.08);
    --border-highlight: rgba(255, 255, 255, 0.15);
    
    --accent-red: #ff3366;
    --accent-red-hover: #ff4d79;
    --accent-blue: #00d4ff;
    --accent-blue-hover: #33ddff;
    --accent-green: #00e676;
    
    --status-active: #ff4757;
    --status-intermittent: #ffa502;
    --status-stored: #2ed573;
    --status-disconnected: #636e72;

    /* Fonts */
    --font-display: 'Outfit', system-ui, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
}

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

body {
    background-color: var(--bg-primary);
    background-image: 
        radial-gradient(circle at 15% 50%, rgba(0, 212, 255, 0.05), transparent 25%),
        radial-gradient(circle at 85% 30%, rgba(255, 51, 102, 0.05), transparent 25%);
    background-attachment: fixed;
    color: var(--text-main);
    font-family: var(--font-display);
    line-height: 1.5;
    height: 100vh;
    overflow: hidden;
}

.app-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
    padding: 1rem;
    gap: 1rem;
}

/* Glassmorphism utility */
.glass-panel {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-subtle);
    border-radius: 12px;
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.3);
}

/* Typography */
h1 {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: 1px;
}
h1 span {
    color: var(--accent-red);
    font-weight: 300;
}
h2 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-main);
}
h3 {
    font-size: 1rem;
    font-weight: 600;
}

.font-mono {
    font-family: var(--font-mono);
}

/* Header */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    flex-shrink: 0;
}

.logo-area {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.rings {
    display: flex;
    gap: -8px; /* Overlap */
}
.ring {
    width: 24px;
    height: 24px;
    border: 3px solid var(--text-main);
    border-radius: 50%;
    margin-right: -8px;
}

.connection-area {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.port-selector {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

select, input {
    background: rgba(0,0,0,0.3);
    border: 1px solid var(--border-subtle);
    color: var(--text-main);
    padding: 0.5rem 1rem;
    border-radius: 6px;
    font-family: var(--font-display);
    font-size: 0.9rem;
    outline: none;
    transition: all 0.2s;
}

select:focus, input:focus {
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 2px rgba(0, 212, 255, 0.2);
}

/* Buttons */
.btn {
    padding: 0.5rem 1.2rem;
    border: none;
    border-radius: 6px;
    font-family: var(--font-display);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn:active {
    transform: scale(0.98);
}

.btn-primary {
    background: var(--accent-blue);
    color: #000;
}
.btn-primary:hover:not(:disabled) {
    background: var(--accent-blue-hover);
    box-shadow: 0 0 15px rgba(0, 212, 255, 0.4);
}

.btn-secondary {
    background: rgba(255,255,255,0.1);
    color: var(--text-main);
}
.btn-secondary:hover:not(:disabled) {
    background: rgba(255,255,255,0.2);
}

.btn-danger {
    background: rgba(255, 51, 102, 0.2);
    color: var(--accent-red);
    border: 1px solid var(--accent-red);
}
.btn-danger:hover:not(:disabled) {
    background: var(--accent-red);
    color: #fff;
    box-shadow: 0 0 15px rgba(255, 51, 102, 0.4);
}

.icon-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.2rem;
    cursor: pointer;
    transition: color 0.2s;
}
.icon-btn:hover {
    color: var(--text-main);
}

/* Status Indicator */
.status-indicator {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    width: 100px;
}

.dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}
.dot.disconnected { background: var(--status-disconnected); }
.dot.connected { 
    background: var(--accent-green); 
    box-shadow: 0 0 10px var(--accent-green);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(0, 230, 118, 0.7); }
    70% { transform: scale(1); box-shadow: 0 0 0 6px rgba(0, 230, 118, 0); }
    100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(0, 230, 118, 0); }
}

/* Layout Utilities */
.hidden { display: none !important; }

.main-content {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
}

/* ECU Info Bar */
.ecu-info-bar {
    display: flex;
    padding: 1rem 1.5rem;
    gap: 2rem;
    flex-shrink: 0;
}

.ecu-item {
    display: flex;
    flex-direction: column;
}
.ecu-item .label {
    font-size: 0.7rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
}
.ecu-item .value {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--accent-blue);
}

/* Dashboard Grid */
.dashboard-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 1rem;
    flex: 1;
    min-height: 500px;
}

.panel {
    display: flex;
    flex-direction: column;
    padding: 1.5rem;
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.panel-actions {
    display: flex;
    gap: 0.5rem;
}

.scrollable {
    overflow-y: auto;
    /* Custom Scrollbar */
    scrollbar-width: thin;
    scrollbar-color: var(--border-highlight) transparent;
}
.scrollable::-webkit-scrollbar { width: 6px; }
.scrollable::-webkit-scrollbar-track { background: transparent; }
.scrollable::-webkit-scrollbar-thumb { background-color: var(--border-highlight); border-radius: 3px; }

/* DTC List */
.dtc-list {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
    flex: 1;
}

.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--text-muted);
    text-align: center;
}
.empty-state .icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    color: var(--border-highlight);
}
.empty-state.success .icon {
    color: var(--accent-green);
}

.dtc-card {
    background: rgba(0,0,0,0.2);
    border: 1px solid var(--border-subtle);
    border-radius: 8px;
    padding: 1rem;
    transition: transform 0.2s;
}
.dtc-card:hover {
    transform: translateY(-2px);
    background: rgba(255,255,255,0.02);
}

.dtc-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 0.5rem;
}

.dtc-code {
    font-family: var(--font-mono);
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-main);
}

.dtc-badge {
    padding: 0.2rem 0.6rem;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}
.dtc-badge.active { background: rgba(255, 71, 87, 0.2); color: var(--status-active); border: 1px solid var(--status-active); }
.dtc-badge.intermittent { background: rgba(255, 165, 2, 0.2); color: var(--status-intermittent); border: 1px solid var(--status-intermittent); }
.dtc-badge.stored { background: rgba(46, 213, 115, 0.2); color: var(--status-stored); border: 1px solid var(--status-stored); }

.dtc-desc {
    font-size: 0.95rem;
    color: var(--text-main);
    margin-bottom: 0.5rem;
}

.dtc-details {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* Measurements */
.group-selector {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.group-pills {
    display: flex;
    gap: 0.3rem;
}

.pill {
    background: rgba(255,255,255,0.05);
    border: 1px solid var(--border-subtle);
    color: var(--text-muted);
    padding: 0.3rem 0.6rem;
    border-radius: 4px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.2s;
}
.pill:hover { background: rgba(255,255,255,0.1); color: var(--text-main); }
.pill.active { background: var(--accent-blue); color: #000; border-color: var(--accent-blue); }

#customGroupInput {
    width: 60px;
    padding: 0.3rem 0.5rem;
}

.meas-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    background: rgba(0,0,0,0.2);
    padding: 0.8rem 1rem;
    border-radius: 8px;
}

.group-name {
    font-weight: 600;
    color: var(--accent-blue);
    font-size: 1.1rem;
}

/* Toggle Switch */
.switch {
  position: relative;
  display: inline-block;
  width: 44px;
  height: 24px;
}
.switch input { opacity: 0; width: 0; height: 0; }
.slider {
  position: absolute;
  cursor: pointer;
  top: 0; left: 0; right: 0; bottom: 0;
  background-color: rgba(255,255,255,0.1);
  transition: .4s;
}
.slider:before {
  position: absolute;
  content: "";
  height: 16px; width: 16px;
  left: 4px; bottom: 4px;
  background-color: var(--text-muted);
  transition: .4s;
}
input:checked + .slider { background-color: rgba(0, 212, 255, 0.3); border: 1px solid var(--accent-blue); }
input:checked + .slider:before { transform: translateX(20px); background-color: var(--accent-blue); }
.slider.round { border-radius: 24px; }
.slider.round:before { border-radius: 50%; }

.live-toggle {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    font-size: 0.9rem;
    font-weight: 600;
}

/* Measurement Grid */
.meas-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: 1fr 1fr;
    gap: 1rem;
    flex: 1;
}

.meas-card {
    background: rgba(0,0,0,0.2);
    border: 1px solid var(--border-subtle);
    border-radius: 12px;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    position: relative;
    overflow: hidden;
    transition: border-color 0.3s;
}
.meas-card.updated {
    border-color: rgba(0, 212, 255, 0.5);
}

.meas-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 600;
    text-transform: uppercase;
    z-index: 2;
}

.meas-value-area {
    display: flex;
    align-items: baseline;
    gap: 0.3rem;
    z-index: 2;
}

.meas-val {
    font-family: var(--font-mono);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-main);
}

.meas-unit {
    font-size: 1.2rem;
    color: var(--accent-blue);
    font-weight: 600;
}

.meas-sparkline {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 40px;
    opacity: 0.4;
    z-index: 1;
}

/* Log Panel */
.log-panel {
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
}

.log-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.8rem 1.5rem;
    border-bottom: 1px solid var(--border-subtle);
}

.log-content {
    height: 150px;
    padding: 1rem 1.5rem;
    font-size: 0.8rem;
    transition: height 0.3s ease;
}
.log-content.collapsed {
    height: 0;
    padding: 0 1.5rem;
    border: none;
}

.log-line {
    margin-bottom: 0.3rem;
    color: var(--text-muted);
}
.log-line.system { color: var(--accent-blue); }
.log-line.error { color: var(--accent-red); }
.log-line.data { color: var(--text-main); }

/* Modal */
.modal {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.6);
    backdrop-filter: blur(5px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal-content {
    padding: 2rem;
    width: 400px;
    text-align: center;
}

.modal h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.warning {
    color: var(--accent-red);
    margin-bottom: 2rem;
}

.modal-actions {
    display: flex;
    justify-content: center;
    gap: 1rem;
}

/* Responsive */
@media (max-width: 1024px) {
    .dashboard-grid {
        grid-template-columns: 1fr;
        overflow-y: auto;
    }
    .main-content {
        overflow-y: auto;
    }
    .dtc-panel {
        height: 400px;
        flex-shrink: 0;
    }
    .meas-panel {
        min-height: 500px;
        flex-shrink: 0;
    }
    .gauge-grid {
        grid-template-columns: repeat(3, 1fr) !important;
    }
}

/* ECU Actions */
.ecu-actions {
    margin-left: auto;
    display: flex;
    align-items: center;
}

/* Export Buttons */
.btn-export {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1.2rem;
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.15), rgba(0, 230, 118, 0.15));
    border: 1px solid rgba(0, 212, 255, 0.3);
    color: var(--accent-blue);
    border-radius: 6px;
    font-family: var(--font-display);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: all 0.3s ease;
}
.btn-export:hover {
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.25), rgba(0, 230, 118, 0.25));
    border-color: var(--accent-blue);
    box-shadow: 0 0 20px rgba(0, 212, 255, 0.2);
    transform: translateY(-1px);
}
.btn-export svg {
    flex-shrink: 0;
}

.btn-export-sm {
    padding: 0.35rem 0.7rem;
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid rgba(0, 212, 255, 0.2);
    color: var(--accent-blue);
    border-radius: 4px;
    font-family: var(--font-display);
    font-size: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}
.btn-export-sm:hover {
    background: rgba(0, 212, 255, 0.2);
    border-color: var(--accent-blue);
}

/* Gauge Dashboard */
.gauge-dashboard {
    padding: 1.5rem;
    flex-shrink: 0;
}

.gauge-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 1rem;
}

.gauge-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 1rem 0.5rem;
    background: rgba(0, 0, 0, 0.25);
    border: 1px solid var(--border-subtle);
    border-radius: 12px;
    transition: all 0.3s ease;
    position: relative;
}

.gauge-card:hover {
    border-color: rgba(0, 212, 255, 0.3);
    background: rgba(0, 0, 0, 0.35);
}

.gauge-card canvas {
    margin-bottom: 0.3rem;
}

.gauge-info {
    display: flex;
    align-items: baseline;
    gap: 0.2rem;
    margin-bottom: 0.2rem;
}

.gauge-value {
    font-family: var(--font-mono);
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--text-main);
}

.gauge-unit {
    font-size: 0.85rem;
    color: var(--accent-blue);
    font-weight: 600;
}

.gauge-label {
    font-size: 0.7rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 600;
    text-align: center;
}

/* Compressor Status */
.compressor-status {
    margin-bottom: 0.3rem;
}

.compressor-ring {
    transition: all 0.4s ease;
}

.compressor-ring.off {
    color: var(--text-muted);
    opacity: 0.4;
}

.compressor-ring.on {
    color: var(--accent-green);
    filter: drop-shadow(0 0 8px rgba(0, 230, 118, 0.6));
    animation: compressor-pulse 1.5s ease-in-out infinite;
}

@keyframes compressor-pulse {
    0%, 100% { filter: drop-shadow(0 0 6px rgba(0, 230, 118, 0.4)); }
    50% { filter: drop-shadow(0 0 14px rgba(0, 230, 118, 0.8)); }
}

/* Gauge arc colors */
.gauge-card[data-warn] {
    border-color: rgba(255, 165, 2, 0.3);
}
.gauge-card[data-danger] {
    border-color: rgba(255, 51, 102, 0.3);
}

/* Car Sensor Diagram */
.car-diagram-section {
    padding: 1.5rem;
    flex-shrink: 0;
}

.car-diagram-container {
    display: flex;
    justify-content: center;
    padding: 0.5rem 0;
}

#carDiagram {
    width: 100%;
    max-width: 850px;
    height: auto;
}

.diagram-legend {
    display: flex;
    gap: 1.2rem;
    align-items: center;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 600;
}

.legend-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.legend-dot.ok {
    background: var(--accent-blue);
    box-shadow: 0 0 6px rgba(0, 212, 255, 0.5);
}

.legend-dot.warn {
    background: #ffa502;
    box-shadow: 0 0 6px rgba(255, 165, 2, 0.5);
}

.legend-dot.fault {
    background: var(--accent-red);
    box-shadow: 0 0 6px rgba(255, 51, 102, 0.5);
    animation: fault-blink 1.5s ease-in-out infinite;
}

@keyframes fault-blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

.sensor-group {
    cursor: pointer;
    transition: opacity 0.3s;
}

.sensor-group:hover {
    opacity: 0.8;
}

@keyframes sensor-pulse-fault {
    0%, 100% { r: 8; opacity: 1; }
    50% { r: 12; opacity: 0.6; }
}