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

body, html {
    width: 100%;
    height: 100%;
    overflow: hidden;
    background-color: #111;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

canvas {
    display: block;
    width: 100vw;
    height: 100vh;
}

/* Start Overlay to grab interaction */
.overlay {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(20, 20, 30, 0.95);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 100;
    backdrop-filter: blur(10px);
    transition: opacity 0.5s ease-out;
}

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

.content {
    text-align: center;
    color: #fff;
    max-width: 400px;
    padding: 30px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 16px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

h1 {
    font-size: 24px;
    margin-bottom: 20px;
    background: linear-gradient(135deg, #00ffcc, #0088ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

p {
    font-size: 14px;
    line-height: 1.6;
    margin-bottom: 25px;
    color: #aaa;
}

button {
    background: linear-gradient(135deg, #00ffcc, #0088ff);
    color: #fff;
    border: none;
    padding: 12px 30px;
    font-size: 16px;
    font-weight: bold;
    border-radius: 30px;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    box-shadow: 0 4px 15px rgba(0, 200, 255, 0.3);
}

button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 200, 255, 0.5);
}

button:active {
    transform: translateY(0);
}