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

body {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    font-family: 'Arial', sans-serif;
}

#game-container {
    position: relative;
    border: 4px solid #333;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 0 30px rgba(0, 0, 0, 0.5);
}

#gameCanvas {
    display: block;
    background: #90EE90;
}

.overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    color: white;
    z-index: 10;
}

.overlay.hidden {
    display: none;
}

.overlay h1 {
    font-size: 56px;
    margin-bottom: 10px;
    color: #FFD700;
    text-shadow: 3px 3px 6px #000;
    letter-spacing: 4px;
}

.overlay > p {
    font-size: 18px;
    margin-bottom: 30px;
    color: #ccc;
}

#start-btn {
    padding: 18px 60px;
    font-size: 28px;
    font-weight: bold;
    background: linear-gradient(180deg, #4CAF50, #388E3C);
    border: none;
    border-radius: 12px;
    color: white;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    text-transform: uppercase;
    letter-spacing: 2px;
}

#start-btn:hover {
    transform: scale(1.08);
    box-shadow: 0 8px 25px rgba(76, 175, 80, 0.6);
}

#start-btn:active {
    transform: scale(1.02);
}

.controls-info {
    margin-top: 35px;
    padding: 20px 30px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.controls-info h3 {
    margin-bottom: 15px;
    color: #FFD700;
    font-size: 18px;
    text-align: center;
}

.controls-info p {
    margin: 8px 0;
    font-size: 14px;
    color: #ddd;
}

.controls-info .key {
    display: inline-block;
    background: #444;
    padding: 3px 8px;
    border-radius: 4px;
    font-family: monospace;
    font-size: 13px;
    border: 1px solid #666;
}

/* Car Selection Screen */
.car-options {
    display: flex;
    gap: 30px;
    margin: 30px 0;
}

.car-option {
    background: rgba(255, 255, 255, 0.1);
    border: 3px solid rgba(255, 255, 255, 0.2);
    border-radius: 15px;
    padding: 20px;
    cursor: pointer;
    transition: all 0.3s;
    text-align: center;
    width: 180px;
}

.car-option:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-5px);
}

.car-option.selected {
    border-color: #FFD700;
    background: rgba(255, 215, 0, 0.2);
    box-shadow: 0 0 20px rgba(255, 215, 0, 0.4);
}

.car-preview {
    width: 100px;
    height: 50px;
    margin: 0 auto 15px;
    border-radius: 10px;
    position: relative;
}

/* Car colors */
.car-speed {
    background: linear-gradient(180deg, #E53935, #B71C1C);
    box-shadow: 0 4px 0 #7f0000;
}

.car-shield {
    background: linear-gradient(180deg, #1E88E5, #0D47A1);
    box-shadow: 0 4px 0 #002171;
}

.car-chomper {
    background: linear-gradient(180deg, #43A047, #1B5E20);
    box-shadow: 0 4px 0 #003300;
}

/* Add wheels to car previews */
.car-preview::before,
.car-preview::after {
    content: '';
    position: absolute;
    width: 18px;
    height: 18px;
    background: #333;
    border-radius: 50%;
    bottom: -8px;
}

.car-preview::before {
    left: 15px;
}

.car-preview::after {
    right: 15px;
}

.car-option h3 {
    color: #FFD700;
    font-size: 18px;
    margin-bottom: 8px;
}

.car-option p {
    color: #ccc;
    font-size: 14px;
}

#race-btn {
    padding: 18px 60px;
    font-size: 28px;
    font-weight: bold;
    background: linear-gradient(180deg, #FF9800, #E65100);
    border: none;
    border-radius: 12px;
    color: white;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-top: 20px;
}

#race-btn:hover {
    transform: scale(1.08);
    box-shadow: 0 8px 25px rgba(255, 152, 0, 0.6);
}

#race-btn.hidden {
    display: none;
}