body {
    margin: 0;
    font-family: 'Arial', sans-serif;
    background: linear-gradient(135deg, #1b2735, #090a0f);
    color: #fff;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    min-height: 100vh;
}

.game-container {
    text-align: center;
    margin-top: 40px;
}

h1 {
    font-size: 2.5rem;
    text-shadow: 0 0 15px #00f6ff, 0 0 30px #00f6ff;
}

.game-board {
    margin: 20px auto;
    display: grid;
    grid-template-columns: repeat(6, 80px);
    grid-gap: 15px;
}

.node {
    width: 80px;
    height: 80px;
    background: #111;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 0 5px #0ff;
    position: relative;
    transition: transform 0.3s;
}

.node.glow::after {
    content: '';
    position: absolute;
    width: 120%;
    height: 120%;
    background: rgba(0, 255, 255, 0.4);
    border-radius: 10px;
    top: -10%;
    left: -10%;
    filter: blur(8px);
    z-index: -1;
}

.node:active {
    transform: scale(1.1);
}

.controls button {
    margin: 5px;
    padding: 10px 20px;
    font-size: 16px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    background: #00f6ff;
    color: #000;
    font-weight: bold;
    transition: 0.3s;
}

.controls button:hover {
    background: #00a8cc;
}