@import url('https://fonts.googleapis.com/css2?family=Orbitron:wght@400;700;900&display=swap');

:root {
    --primary: #ffdd57;
    --bg: #0a0a0a;
    --glass: rgba(255, 255, 255, 0.1);
    --glass-border: rgba(255, 255, 255, 0.2);
}

#game-container {
    position: absolute;
    width: min(100vw, 90vh);
    height: min(100vw, 90vh);
    max-width: 100vw;
    left: 50%;
    transform: translateX(-50%);
    overflow: hidden;
    background-color: var(--bg);
    font-family: 'Orbitron', sans-serif;
    color: #fff;
    z-index: 1;
}

#game-container > canvas {
    display: block;
    width: 100%;
    height: 100%;
}

#ui {
    position: absolute;
    width: min(100vw, 90vh);
    height: min(100vw, 90vh);
    max-width: 100vw;
    left: 50%;
    transform: translateX(-50%);
    pointer-events: none;
    z-index: 10;
}

#hud {
    position: absolute;
    top: 10px;
    left: 10px;
    right: 10px;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 10px;
}

.hud-box {
    background: var(--glass);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    padding: 8px 15px;
    border-radius: 8px;
    text-transform: uppercase;
}

.hud-label {
    font-size: 9px;
    opacity: 0.7;
    margin-bottom: 2px;
}

.hud-value {
    font-size: 20px;
    font-weight: 900;
    color: var(--primary);
}

#speedometer {
    position: absolute;
    bottom: 20px;
    right: 20px;
    width: 120px;
    height: 120px;
    background: var(--glass);
    backdrop-filter: blur(15px);
    border-radius: 50%;
    border: 2px solid var(--glass-border);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    box-shadow: 0 0 20px rgba(255, 221, 87, 0.2);
}

#speedometer .hud-label {
    font-size: 9px;
}

#speedometer .hud-value {
    font-size: 32px;
}

#overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.85);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    pointer-events: auto;
    transition: opacity 0.5s;
}

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

h1 {
    font-size: 48px;
    margin: 0;
    background: linear-gradient(180deg, #fff 0%, var(--primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    filter: drop-shadow(0 0 10px rgba(255, 221, 87, 0.5));
}

#start-btn {
    margin-top: 20px;
    padding: 12px 30px;
    font-size: 18px;
    font-weight: 700;
    font-family: inherit;
    background: var(--primary);
    border: none;
    border-radius: 4px;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(255, 221, 87, 0.4);
    transition: transform 0.2s, background 0.2s;
}

#start-btn:hover {
    transform: scale(1.05);
    background: #ffea7a;
}

.controls-hint {
    margin-top: 15px;
    opacity: 0.6;
    font-size: 12px;
}

#countdown {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 100px;
    font-weight: 900;
    color: var(--primary);
    text-shadow: 0 0 20px rgba(255, 221, 87, 0.8);
    opacity: 0;
    pointer-events: none;
}

/* Mobile Adjustments */
@media (max-width: 768px) {
    h1 {
        font-size: 36px;
    }
    
    #start-btn {
        font-size: 16px;
        padding: 10px 25px;
    }
    
    .hud-box {
        padding: 6px 10px;
    }
    
    .hud-label {
        font-size: 8px;
    }
    
    .hud-value {
        font-size: 16px;
    }
    
    #speedometer {
        width: 80px;
        height: 80px;
        bottom: 10px;
        right: 10px;
    }
    
    #speedometer .hud-label {
        font-size: 7px;
    }
    
    #speedometer .hud-value {
        font-size: 22px;
    }
    
    #countdown {
        font-size: 80px;
    }
}