:root {
    --dino-color: #2dd4bf;
    --cactus-color: #f43f5e;
    --ground-color: rgba(255, 255, 255, 0.1);
}

.game-container {
    max-width: 800px;
    width: 100%;
    margin: 2rem auto;
    padding: 0 1rem;
}

.header-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.back-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-dim);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s;
}

.back-btn:hover {
    color: var(--primary);
}

.score-board {
    display: flex;
    gap: 2rem;
    font-family: 'Courier New', Courier, monospace;
    font-weight: 800;
    font-size: 1.2rem;
    color: var(--text);
}

.score-item span {
    color: var(--primary);
}

.high-score {
    opacity: 0.6;
}

.game-wrapper {
    position: relative;
    width: 100%;
    height: 300px;
    background: var(--card-bg);
    border: 2px solid var(--border);
    border-radius: 1.5rem;
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

#gameCanvas {
    width: 100%;
    height: 100%;
    display: block;
}

.overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(4, 47, 46, 0.9);
    backdrop-filter: blur(8px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 10;
    transition: opacity 0.5s ease;
}

.overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

.overlay-content {
    text-align: center;
    animation: zoomIn 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.dino-preview img {
    width: 80px;
    height: 80px;
    margin-bottom: 1rem;
    filter: drop-shadow(0 0 10px var(--primary-glow));
}

.overlay h1 {
    font-size: 3rem;
    margin-bottom: 0.5rem;
    color: #fff;
    text-shadow: 0 0 20px var(--primary-glow);
}

.overlay h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    background: linear-gradient(to bottom right, #fff, var(--primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.overlay p {
    color: var(--text-dim);
    margin-bottom: 2rem;
}

.overlay p span {
    color: var(--primary);
    font-weight: 800;
}

.primary-btn {
    background: var(--primary);
    color: #042f2e;
    border: none;
    padding: 1rem 2.5rem;
    font-size: 1.1rem;
    font-weight: 800;
    border-radius: 1rem;
    cursor: pointer;
    transition: all 0.3s;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.primary-btn:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px var(--primary-glow);
}

@keyframes zoomIn {
    from { opacity: 0; transform: scale(0.8); }
    to { opacity: 1; transform: scale(1); }
}