body {
    margin: 0;
    padding: 0;
    color: rgba(255, 255, 255, 0.87);
    background-color: #0a0a12;
    font-family: 'Outfit', sans-serif;
}

#app {
    width: 100vw;
    height: 100vh;
    height: 100dvh;
    overflow: hidden;
    position: fixed;
    top: 0;
    left: 0;
}

#game-container {
    width: 100vw;
    height: 100vh;
    height: 100dvh;
}

/* Ensure crisp canvas rendering on high-DPI displays */
#game-container canvas {
    image-rendering: -webkit-optimize-contrast; /* Safari */
    image-rendering: crisp-edges; /* Firefox */
    image-rendering: pixelated; /* Standard */
    image-rendering: optimize-contrast; /* Older WebKit */
    -ms-interpolation-mode: nearest-neighbor; /* IE */
}

.username-input {
    position: absolute;
    width: 220px;
    box-sizing: border-box;
    transform: translateX(-50%);
    padding: 12px 20px;
    font-family: 'Orbitron', 'Outfit', sans-serif;
    font-size: 16px;
    font-weight: 600;
    letter-spacing: 1px;
    border: 2px solid rgba(0, 240, 255, 0.4);
    border-radius: 30px;
    background: rgba(10, 10, 20, 0.6);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    color: #00f0ff;
    text-align: center;
    box-shadow: 0 0 15px rgba(0, 240, 255, 0.15), inset 0 0 10px rgba(0, 240, 255, 0.1);
    outline: none;
    transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.username-input::placeholder {
    color: rgba(0, 240, 255, 0.4);
    font-weight: 400;
}

.username-input:hover {
    border-color: rgba(255, 0, 128, 0.6);
    box-shadow: 0 0 20px rgba(255, 0, 128, 0.25), inset 0 0 10px rgba(255, 0, 128, 0.15);
    color: #ff0080;
}

.username-input:focus {
    border-color: #ff0080;
    box-shadow: 0 0 25px rgba(255, 0, 128, 0.4), inset 0 0 15px rgba(255, 0, 128, 0.2);
    color: #ff0080;
    transform: translateX(-50%) scale(1.05);
}