.traffic-stage {
    width: 100%;
    height: 100%;
    position: relative;
    background: linear-gradient(to bottom, #87CEEB 0%, #87CEEB 60%, #90EE90 60%, #90EE90 100%);
    overflow: hidden;
    touch-action: none;
}

.road {
    position: absolute;
    bottom: 10%;
    width: 100%;
    height: 30%;
    background-color: #555;
    border-top: 5px solid #333;
    border-bottom: 5px solid #333;
    z-index: 1;
}

.road-lines {
    position: absolute;
    top: 50%;
    width: 100%;
    height: 0;
    border-top: 5px dashed #FFEB3B;
    transform: translateY(-50%);
}

.traffic-light-container {
    position: absolute;
    top: 10%;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
    display: flex;
    flex-direction: column;
    align-items: center;
    transition: all 0.3s ease;
}

.traffic-pole {
    width: 15px;
    height: 100px;
    background-color: #333;
    margin-bottom: -5px;
}

.traffic-light-box {
    width: 120px;
    background-color: #333;
    border-radius: 20px;
    padding: 15px;
    display: flex;
    flex-direction: column;
    align-items: center; /* Ensure circles are centered horizontally */
    gap: 15px;
    box-shadow: 5px 5px 15px rgba(0,0,0,0.3);
    cursor: pointer;
    transition: transform 0.1s;
}

.traffic-light-box:active {
    transform: scale(0.95);
}

.light-circle {
    width: 90px;
    height: 90px;
    border-radius: 50%;
    background-color: #222;
    border: 3px solid #111;
    transition: all 0.3s;
    opacity: 0.3;
}

.light-red.active {
    background-color: #FF5252;
    box-shadow: 0 0 30px #FF5252;
    opacity: 1;
    border-color: #D32F2F;
}

.light-green.active {
    background-color: #69F0AE;
    box-shadow: 0 0 30px #69F0AE;
    opacity: 1;
    border-color: #388E3C;
}

/* Vehicles */
.vehicle {
    position: absolute;
    bottom: 20%; /* Aligned with road */
    font-size: 80px;
    z-index: 5;
    user-select: none;
    will-change: transform;
    /* Animation defined in JS or here? Let's define keyframes here */
    animation-name: drive;
    animation-timing-function: linear;
    animation-fill-mode: forwards;
}

.vehicle.stopped {
    animation-play-state: paused;
}

@keyframes drive {
    from {
        /* Flip to face right (if native emoji faces left) */
        transform: translateX(-150px) scaleX(-1);
    }
    to {
        transform: translateX(110vw) scaleX(-1);
    }
}

/* Instruction Hint */
.traffic-hint {
    position: absolute;
    top: 75%; /* Moved down on desktop */
    left: 50%;
    transform: translateX(-50%);
    font-size: 1.8rem; /* Larger text */
    color: #333;
    background: #ffffff; /* Solid white for better contrast */
    padding: 10px 20px;
    border: 3px solid #333; /* Strong border */
    border-radius: 50px; /* Pill shape */
    pointer-events: none;
    font-weight: 900; /* Boldest */
    z-index: 20; /* Above everything */
    box-shadow: 0 4px 10px rgba(0,0,0,0.3);
    animation: bounce-hint 2s infinite;
}

@keyframes bounce-hint {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(-10px); }
}

/* Mobile Optimizations */
@media (max-width: 768px) {
    .traffic-stage {
        display: flex;
        flex-direction: column;
        justify-content: space-between;
    }

    .traffic-light-container {
        top: 20px; /* Stick to top */
        transform: translateX(-50%) scale(0.7); /* Scale down */
        transform-origin: top center;
    }

    .traffic-pole {
        height: 50px; /* Shorter pole */
    }

    .road {
        bottom: 0; /* Road at very bottom */
        height: 40%; /* Taller road for easier visibility */
    }

    .vehicle {
        bottom: 5%; /* Align with new road position */
        font-size: 60px; /* Slightly smaller cars */
    }

    .traffic-hint {
        top: auto;
        bottom: 20px; /* Moved to bottom on mobile */
        font-size: 1.2rem;
        padding: 8px 16px;
    }
}