:root {
    --bg-primary: #08090d;
    --bg-surface: #10131a;
    --bg-panel: #161b24;
    --border-color: #242c3b;
    --border-light: #323d50;
    --text-primary: #f0f4fc;
    --text-secondary: #94a3b8;
    --text-dim: #5c687d;
    --car-accent: #E53E3E;
    --car-glow: rgba(229, 62, 62, 0.35);
    --shift-red: #ef4444;
    --shift-yellow: #f59e0b;
    --shift-green: #10b981;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    -webkit-tap-highlight-color: transparent;
    user-select: none;
}

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    min-height: 100vh;
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
    position: relative;
}

/* Background Atmosphere Glow */
body::before {
    content: '';
    position: fixed;
    top: -20%;
    left: 50%;
    transform: translateX(-50%);
    width: 600px;
    height: 400px;
    background: radial-gradient(circle, var(--car-glow) 0%, transparent 70%);
    pointer-events: none;
    z-index: 0;
    opacity: 0.6;
    transition: background 0.4s ease;
}

.app-container {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    flex: 1;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
    padding: 16px 20px;
}

/* Header */
.header-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border-color);
}

.brand-section {
    display: flex;
    align-items: center;
    gap: 12px;
}

.brand-icon {
    width: 32px;
    height: 32px;
    background: var(--car-accent);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 0 15px var(--car-glow);
    transition: background 0.3s ease;
}

.brand-icon svg {
    width: 18px;
    height: 18px;
    fill: white;
}

.brand-name {
    font-size: 1.25rem;
    font-weight: 800;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: #ffffff;
}

.brand-name span {
    color: var(--car-accent);
    transition: color 0.3s ease;
}

.header-badges {
    display: flex;
    align-items: center;
    gap: 10px;
}

.status-badge {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 6px 12px;
    border-radius: 20px;
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #64748b;
}

.status-dot.active {
    background: #10b981;
    box-shadow: 0 0 8px #10b981;
}

.status-dot.searching {
    background: #f59e0b;
    box-shadow: 0 0 8px #f59e0b;
    animation: pulse 1.5s infinite;
}

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

.btn-icon {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 8px;
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

.btn-icon:hover {
    color: #fff;
    border-color: var(--border-light);
}

/* Shift Lights LED Bar */
.shift-lights-bar {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-bottom: 12px;
    padding: 6px 12px;
    background: var(--bg-surface);
    border-radius: 24px;
    border: 1px solid var(--border-color);
    max-width: 480px;
    margin-left: auto;
    margin-right: auto;
    width: 100%;
}

.led {
    flex: 1;
    height: 8px;
    border-radius: 4px;
    background: #1c212d;
    transition: background 0.08s ease, box-shadow 0.08s ease;
}

.led.green.on {
    background: var(--shift-green);
    box-shadow: 0 0 8px var(--shift-green);
}

.led.yellow.on {
    background: var(--shift-yellow);
    box-shadow: 0 0 8px var(--shift-yellow);
}

.led.red.on {
    background: var(--shift-red);
    box-shadow: 0 0 10px var(--shift-red);
}

.led.red.flashing {
    animation: shiftFlash 0.12s infinite alternate;
}

@keyframes shiftFlash {
    from { background: #1c212d; box-shadow: none; }
    to { background: var(--shift-red); box-shadow: 0 0 14px var(--shift-red); }
}

/* Cockpit Cluster Main Grid */
.cockpit-grid {
    display: grid;
    grid-template-columns: 1fr 340px 1fr;
    gap: 16px;
    align-items: center;
    margin-bottom: 20px;
}

@media (max-width: 860px) {
    .cockpit-grid {
        grid-template-columns: 1fr;
    }
}

/* Central Instrument Gauge (Tachometer & Speedometer) */
.instrument-card {
    grid-column: 2;
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
}

@media (max-width: 860px) {
    .instrument-card {
        grid-column: 1;
    }
}

.gauge-canvas-wrapper {
    position: relative;
    width: 280px;
    height: 280px;
    display: flex;
    align-items: center;
    justify-content: center;
}

#gaugeCanvas {
    width: 280px;
    height: 280px;
}

.gauge-center-readout {
    position: absolute;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    pointer-events: none;
}

.gear-display {
    font-size: 2.8rem;
    font-weight: 900;
    color: #ffffff;
    line-height: 1;
    text-shadow: 0 0 16px var(--car-glow);
    font-family: monospace, sans-serif;
}

.gear-label {
    font-size: 0.65rem;
    font-weight: 700;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 4px;
}

.speed-value {
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--car-accent);
    line-height: 1;
    font-family: monospace, sans-serif;
    transition: color 0.3s ease;
}

.speed-unit {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-secondary);
    letter-spacing: 1px;
}

/* Left & Right Telemetry Cards */
.telemetry-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.telemetry-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.telemetry-title {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-dim);
}

.telemetry-value {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    font-family: monospace, sans-serif;
}

.meter-bar-container {
    height: 6px;
    background: var(--bg-panel);
    border-radius: 3px;
    overflow: hidden;
    margin-top: 4px;
}

.meter-bar-fill {
    height: 100%;
    width: 0%;
    background: var(--car-accent);
    transition: width 0.08s ease, background 0.3s ease;
}

/* Visualizer Canvas */
.visualizer-wrapper {
    width: 100%;
    height: 48px;
    background: var(--bg-panel);
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid var(--border-color);
}

#visualizerCanvas {
    width: 100%;
    height: 100%;
}

/* Car Selector Carousel */
.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.section-title {
    font-size: 0.9rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-secondary);
}

.cars-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 12px;
    margin-bottom: 20px;
}

.car-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: 14px;
    padding: 14px;
    cursor: pointer;
    transition: all 0.25s ease;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
}

.car-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: transparent;
    transition: background 0.25s ease;
}

.car-card:hover {
    border-color: var(--border-light);
    transform: translateY(-2px);
}

.car-card.selected {
    border-color: var(--car-accent);
    background: var(--bg-panel);
    box-shadow: 0 4px 20px var(--car-glow);
}

.car-card.selected::before {
    background: var(--car-accent);
}

.car-badge {
    align-self: flex-start;
    font-size: 0.65rem;
    font-weight: 700;
    padding: 3px 8px;
    border-radius: 12px;
    background: var(--bg-panel);
    color: var(--text-dim);
    margin-bottom: 8px;
    border: 1px solid var(--border-color);
}

.car-card.selected .car-badge {
    color: var(--car-accent);
    border-color: var(--car-accent);
}

.car-name {
    font-size: 0.95rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 4px;
}

.car-engine-type {
    font-size: 0.72rem;
    color: var(--text-secondary);
    line-height: 1.3;
}

/* Control Strip */
.controls-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 16px;
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    align-items: center;
    justify-content: space-between;
}

.main-start-btn {
    flex: 1 1 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    background: var(--car-accent);
    color: #ffffff;
    border: none;
    border-radius: 12px;
    padding: 14px 24px;
    font-size: 1rem;
    font-weight: 800;
    letter-spacing: 1px;
    text-transform: uppercase;
    cursor: pointer;
    box-shadow: 0 4px 15px var(--car-glow);
    transition: all 0.25s ease;
}

.main-start-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 22px var(--car-glow);
}

.main-start-btn.running {
    background: #1e293b;
    border: 1px solid var(--border-color);
    box-shadow: none;
}

.control-group {
    display: flex;
    align-items: center;
    gap: 8px;
}

.control-label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-dim);
    text-transform: uppercase;
}

.pill-toggle {
    display: flex;
    background: var(--bg-panel);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 2px;
}

.pill-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 0.75rem;
    font-weight: 600;
    padding: 6px 12px;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s;
}

.pill-btn.active {
    background: var(--bg-surface);
    color: #ffffff;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.4);
}

/* Simulator Test Bench Drawer */
.simulator-drawer {
    margin-top: 14px;
    background: var(--bg-panel);
    border: 1px dashed var(--border-light);
    border-radius: 14px;
    padding: 16px;
    display: none;
    flex-direction: column;
    gap: 14px;
}

.simulator-drawer.active {
    display: flex;
}

.sim-pedals-row {
    display: flex;
    gap: 14px;
}

.sim-pedal-btn {
    flex: 1;
    padding: 18px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    font-size: 0.95rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 1px;
    cursor: pointer;
    touch-action: manipulation;
    transition: all 0.1s;
}

.sim-gas-btn {
    background: #064e3b;
    color: #6ee7b7;
    border-color: #059669;
}

.sim-gas-btn:active, .sim-gas-btn.pressed {
    background: #059669;
    color: #ffffff;
    box-shadow: 0 0 20px rgba(5, 150, 105, 0.5);
    transform: scale(0.98);
}

.sim-brake-btn {
    background: #7f1d1d;
    color: #fca5a5;
    border-color: #dc2626;
}

.sim-brake-btn:active, .sim-brake-btn.pressed {
    background: #dc2626;
    color: #ffffff;
    box-shadow: 0 0 20px rgba(220, 38, 38, 0.5);
    transform: scale(0.98);
}

.sim-paddles-row {
    display: flex;
    justify-content: center;
    gap: 16px;
}

.paddle-btn {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    color: #fff;
    padding: 10px 24px;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 800;
    cursor: pointer;
    transition: all 0.15s;
}

.paddle-btn:hover {
    border-color: var(--car-accent);
}

.paddle-btn:active {
    transform: scale(0.95);
    background: var(--car-accent);
}

.slider-container {
    display: flex;
    align-items: center;
    gap: 12px;
}

.slider-container input[type="range"] {
    flex: 1;
    accent-color: var(--car-accent);
    cursor: pointer;
}

/* Steering Wheel & Mobile Guidance Footer */
.footer-tips {
    margin-top: 20px;
    font-size: 0.75rem;
    color: var(--text-dim);
    text-align: center;
    line-height: 1.6;
}

.footer-tips kbd {
    background: var(--bg-panel);
    border: 1px solid var(--border-color);
    padding: 2px 6px;
    border-radius: 4px;
    color: var(--text-secondary);
    font-family: monospace;
}

/* Modal Overlay & Dialog */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(4, 5, 8, 0.85);
    backdrop-filter: blur(8px);
    z-index: 999;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.modal-overlay.active {
    display: flex;
}

.modal-content {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    max-width: 600px;
    width: 100%;
    max-height: 85vh;
    display: flex;
    flex-direction: column;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6);
    overflow: hidden;
    animation: modalPop 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes modalPop {
    from { opacity: 0; transform: scale(0.95) translateY(10px); }
    to { opacity: 1; transform: scale(1) translateY(0); }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 24px;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
    font-size: 1.15rem;
    font-weight: 800;
    color: #ffffff;
}

.modal-close-btn {
    background: transparent;
    border: none;
    font-size: 1.5rem;
    color: var(--text-dim);
    cursor: pointer;
    line-height: 1;
    padding: 4px 8px;
    border-radius: 6px;
    transition: color 0.2s;
}

.modal-close-btn:hover {
    color: #fff;
}

.modal-body {
    padding: 20px 24px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.guide-item {
    display: flex;
    gap: 14px;
    align-items: flex-start;
}

.guide-icon {
    font-size: 1.5rem;
    line-height: 1;
    padding: 8px;
    background: var(--bg-panel);
    border-radius: 10px;
    border: 1px solid var(--border-color);
}

.guide-item strong {
    display: block;
    color: #ffffff;
    font-size: 0.95rem;
    margin-bottom: 4px;
}

.guide-item p {
    font-size: 0.82rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.modal-footer {
    padding: 16px 24px;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
}

.modal-btn {
    background: var(--car-accent);
    color: #ffffff;
    border: none;
    border-radius: 10px;
    padding: 12px 20px;
    font-size: 0.85rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s;
    letter-spacing: 0.5px;
}

.modal-btn:hover {
    opacity: 0.9;
    transform: translateY(-1px);
}