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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: #0a0a0a;
    color: #ffffff;
    overflow: hidden;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

.container {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
}

.header {
    position: absolute;
    top: 40px;
    text-align: center;
    z-index: 10;
    pointer-events: none;
}

h1 {
    font-size: 3rem;
    font-weight: 300;
    letter-spacing: 0.1em;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    font-size: 1.2rem;
    color: #a0a0a0;
    font-weight: 300;
    letter-spacing: 0.2em;
    margin-bottom: 1rem;
}

.instruction {
    font-size: 0.9rem;
    color: #666;
    font-style: italic;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 0.6; }
    50% { opacity: 1; }
}

#rippleCanvas {
    width: 100%;
    height: 100%;
    cursor: crosshair;
    display: block;
}

.footer {
    position: absolute;
    bottom: 40px;
    text-align: center;
    z-index: 10;
    pointer-events: none;
}

.footer p {
    font-size: 0.85rem;
    color: #555;
    font-style: italic;
}