:root {
    --bg-dark: #0a0a0c;
    --primary: #f94144;
    --primary-glow: rgba(249, 65, 68, 0.6);
    --secondary: #f3722c;
    --text-main: #ffffff;
    --text-muted: #888888;
    --panel-bg: rgba(20, 20, 25, 0.85);
    --glass-border: rgba(255, 255, 255, 0.1);
    
    --font-heading: 'Teko', sans-serif;
    --font-body: 'Montserrat', sans-serif;
}

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

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    font-family: var(--font-body);
    overflow: hidden;
    width: 100vw;
    height: 100vh;
    touch-action: none;
}

#game-container {
    position: relative;
    width: 100%;
    height: 100%;
    overflow: hidden;
    background: radial-gradient(circle at center, #1a1a24 0%, #050508 100%);
}

#gameCanvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

#ui-layer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 10;
    pointer-events: none;
    display: flex;
    flex-direction: column;
}

.hidden {
    display: none !important;
}

/* Typography & Headings */
h1, h2 {
    font-family: var(--font-heading);
    text-transform: uppercase;
    text-align: center;
}

h1 {
    font-size: 6rem;
    line-height: 0.9;
    letter-spacing: 2px;
    text-shadow: 0 10px 20px rgba(0,0,0,0.8);
    margin-bottom: 2rem;
}

.highlight {
    color: var(--primary);
    text-shadow: 0 0 20px var(--primary-glow);
}

h2 {
    font-size: 4rem;
    margin-bottom: 1.5rem;
    color: #fff;
}

/* Menu Screens */
.menu-screen {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background: rgba(10, 10, 12, 0.7);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    pointer-events: auto;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.menu-screen.active {
    opacity: 1;
}

.menu-buttons {
    display: flex;
    flex-direction: column;
    gap: 15px;
    width: 300px;
}

/* Premium Buttons */
button {
    font-family: var(--font-heading);
    font-size: 2rem;
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: all 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    position: relative;
    overflow: hidden;
}

button::before {
    content: '';
    position: absolute;
    top: 0; left: -100%;
    width: 50%; height: 100%;
    background: linear-gradient(to right, transparent, rgba(255,255,255,0.3), transparent);
    transform: skewX(-25deg);
    transition: left 0.5s ease;
}

button:hover::before {
    left: 150%;
}

button:active {
    transform: scale(0.95);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    box-shadow: 0 10px 20px rgba(249, 65, 68, 0.4);
}

.btn-primary:hover {
    box-shadow: 0 15px 30px rgba(249, 65, 68, 0.6);
    transform: translateY(-2px);
}

.btn-secondary {
    background: rgba(255,255,255,0.1);
    color: white;
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(5px);
}

.btn-secondary:hover {
    background: rgba(255,255,255,0.2);
    border-color: rgba(255,255,255,0.3);
}

/* HUD System */
#hud {
    display: flex;
    justify-content: space-between;
    padding: 20px 40px;
    width: 100%;
}

.hud-left, .hud-right {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.score-box, .level-box {
    background: var(--panel-bg);
    border: 1px solid var(--glass-border);
    padding: 10px 20px;
    border-radius: 8px;
    min-width: 150px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 4px 15px rgba(0,0,0,0.5);
    backdrop-filter: blur(5px);
}

.label {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--text-muted);
}

#score-display, #level-display {
    font-family: var(--font-heading);
    font-size: 2rem;
    line-height: 1;
    color: #fff;
    text-shadow: 0 0 10px rgba(255,255,255,0.5);
}

.speedometer {
    position: relative;
    width: 120px;
    height: 120px;
    background: var(--panel-bg);
    border-radius: 50%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    border: 2px solid var(--glass-border);
    box-shadow: 0 0 20px rgba(0,0,0,0.5), inset 0 0 20px rgba(0,0,0,0.8);
}

.speed-ring {
    position: absolute;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    border: 4px solid transparent;
    border-top-color: var(--primary);
    border-right-color: var(--secondary);
    animation: rotate 2s linear infinite;
    opacity: 0.5;
}

@keyframes rotate {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

#speed-display {
    font-family: var(--font-heading);
    font-size: 3rem;
    line-height: 1;
    color: #fff;
    text-shadow: 0 0 15px var(--primary-glow);
}

.speed-label {
    font-size: 0.7rem;
    color: var(--text-muted);
    font-weight: bold;
}

/* Combo Display */
.hud-center {
    display: flex;
    justify-content: center;
    align-items: flex-start;
    padding-top: 20px;
}

#combo-display {
    text-align: center;
    animation: pop 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

#combo-text {
    display: block;
    font-family: var(--font-heading);
    font-size: 4rem;
    color: #ffd166;
    text-shadow: 0 5px 15px rgba(255, 209, 102, 0.5);
    line-height: 0.8;
}

#combo-multiplier {
    font-size: 2rem;
    font-weight: 900;
    color: var(--primary);
    text-shadow: 0 2px 10px var(--primary-glow);
}

@keyframes pop {
    0% { transform: scale(0.5); opacity: 0; }
    80% { transform: scale(1.1); }
    100% { transform: scale(1); opacity: 1; }
}

/* Level Grid */
.level-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 15px;
    max-width: 800px;
    max-height: 50vh;
    overflow-y: auto;
    padding: 20px;
    margin-bottom: 20px;
}

.level-grid::-webkit-scrollbar {
    width: 8px;
}
.level-grid::-webkit-scrollbar-thumb {
    background: var(--primary);
    border-radius: 4px;
}

.lvl-btn {
    width: 80px;
    height: 80px;
    font-size: 2.5rem;
    display: flex;
    justify-content: center;
    align-items: center;
    background: var(--panel-bg);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
}

.lvl-btn.locked {
    opacity: 0.5;
    background: rgba(0,0,0,0.5);
    cursor: not-allowed;
}
.lvl-btn.locked:hover {
    transform: none;
    box-shadow: none;
}

/* Tutorial */
.tutorial-content {
    background: var(--panel-bg);
    padding: 30px;
    border-radius: 12px;
    border: 1px solid var(--glass-border);
    margin-bottom: 30px;
    display: flex;
    flex-direction: column;
    gap: 15px;
    width: 400px;
}

.tut-item {
    display: flex;
    align-items: center;
    gap: 15px;
}

.key-icon {
    background: rgba(255,255,255,0.1);
    border: 1px solid rgba(255,255,255,0.3);
    padding: 5px 15px;
    border-radius: 6px;
    font-weight: bold;
    min-width: 80px;
    text-align: center;
}

.stunts-tut {
    margin-top: 15px;
    color: var(--secondary);
    font-weight: bold;
    text-align: center;
    justify-content: center;
}

/* End Screen */
.stats-box {
    background: var(--panel-bg);
    padding: 30px;
    border-radius: 12px;
    margin-bottom: 30px;
    min-width: 300px;
    font-size: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 10px;
    border: 1px solid var(--glass-border);
}

.stat-row {
    display: flex;
    justify-content: space-between;
}

#end-title {
    font-size: 6rem;
}
.win-title { color: #06d6a0; text-shadow: 0 0 20px rgba(6,214,160,0.5); }
.crash-title { color: var(--primary); text-shadow: 0 0 20px var(--primary-glow); }

/* Mobile Controls */
#mobile-controls {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: 20px 40px;
    display: flex;
    justify-content: space-between;
    z-index: 20;
    pointer-events: none; /* Let clicks pass through empty space */
}

.controls-left, .controls-right {
    display: flex;
    gap: 20px;
    pointer-events: auto; /* Re-enable for buttons */
}

.control-btn {
    background: rgba(255, 255, 255, 0.1);
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    color: rgba(255, 255, 255, 0.7);
    font-family: var(--font-heading);
    font-size: 2.5rem;
    display: flex;
    justify-content: center;
    align-items: center;
    backdrop-filter: blur(5px);
    transition: all 0.1s;
    user-select: none;
    -webkit-user-select: none;
    touch-action: none; /* Crucial for preventing default mobile gestures on buttons */
}

.control-btn:active {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(0.9);
}

.tilt-btn {
    width: 80px;
    height: 80px;
    font-size: 3rem;
    line-height: 1;
}

.pedal-btn {
    width: 90px;
    height: 90px;
    font-size: 1.8rem;
    border-radius: 20px; /* Make them slightly square */
}

#btn-accel {
    background: rgba(249, 65, 68, 0.2);
    border-color: rgba(249, 65, 68, 0.5);
    color: #fff;
}
#btn-accel:active {
    background: rgba(249, 65, 68, 0.5);
}

/* Responsive */
@media (max-width: 768px) {
    h1 { font-size: 4rem; }
    h2 { font-size: 3rem; }
    
    #hud { padding: 10px; }
    .score-box, .level-box { min-width: 100px; padding: 5px 10px; }
    #score-display, #level-display { font-size: 1.5rem; }
    .speedometer { width: 80px; height: 80px; }
    #speed-display { font-size: 2rem; }
    
    .level-grid { grid-template-columns: repeat(4, 1fr); padding: 10px; }
    .lvl-btn { width: 60px; height: 60px; font-size: 2rem; }
    
    .tutorial-content { width: 90%; }
    
    #mobile-controls { padding: 10px 20px; }
    .tilt-btn { width: 60px; height: 60px; font-size: 2rem; }
    .pedal-btn { width: 70px; height: 70px; font-size: 1.2rem; }
    
    #combo-text { font-size: 2.5rem; }
    #combo-multiplier { font-size: 1.5rem; }
}

@media (max-width: 480px) {
    .level-grid { grid-template-columns: repeat(3, 1fr); }
    #hud { display: grid; grid-template-columns: 1fr 1fr; grid-template-rows: auto auto; }
    .hud-center { grid-column: span 2; padding-top: 10px; }
}