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

body {
    font-family: 'Arial', sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    min-height: 100vh;
}

header {
    background: rgba(0, 0, 0, 0.8);
    padding: 1rem 2rem;
    text-align: center;
    border-bottom: 3px solid #ff6b6b;
}

.header-content h1 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

.header-content h2 {
    color: #ffd166;
    font-size: 1.5rem;
}

.stats {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-top: 1rem;
    flex-wrap: wrap;
}

.stats div {
    background: rgba(255, 255, 255, 0.2);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    backdrop-filter: blur(5px);
}

main {
    max-width: 800px;
    margin: 2rem auto;
    padding: 0 1rem;
}

#game-container {
    text-align: center;
}

#marbles-board {
    display: grid;
    grid-template-columns: repeat(8, 40px);
    grid-gap: 5px;
    justify-content: center;
    margin-bottom: 2rem;
}

.marble {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    transition: transform 0.2s;
}

.marble:hover {
    transform: scale(1.1);
}

.red { background-color: #e74c3c; }
.blue { background-color: #3498db; }
.green { background-color: #2ecc71; }
.yellow { background-color: #f39c12; }
.purple { background-color: #9b59b6; }

#resetButton {
    padding: 12px 24px;
    background: #27ae60;
    color: white;
    border: none;
    border-radius: 25px;
    cursor: pointer;
    font-size: 1rem;
    transition: background 0.3s;
}

#resetButton:hover {
    background: #219a52;
}

footer {
    text-align: center;
    padding: 1rem;
    background: rgba(0, 0, 0, 0.7);
    margin-top: 2rem;
}