* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    user-select: none;
    -webkit-user-select: none;
}

body {
    background-color: #0d1b2a;
    color: #ffffff;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 10px;
    min-height: 100vh;
}

#game-header {
    text-align: center;
    margin-bottom: 10px;
}

#game-header h1 {
    font-size: 1.5rem;
    color: #e63946;
}

#score-container {
    font-size: 1.1rem;
    font-weight: bold;
    margin-top: 5px;
    color: #f1faee;
}

#game-container {
    width: 100%;
    max-width: 450px;
    height: 60vh;
    background-color: #1b263b;
    border: 3px solid #415a77;
    border-radius: 12px;
    position: relative;
    overflow: hidden;
    touch-action: none;
}

.ball {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    position: absolute;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 16px;
    cursor: grab;
    box-shadow: 0 2px 5px rgba(0,0,0,0.5);
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(2px);
}

#leaderboard-container {
    width: 100%;
    max-width: 450px;
    margin-top: 15px;
    background: #1b263b;
    padding: 15px;
    border-radius: 12px;
    border: 1px solid #415a77;
}

#leaderboard-container h2 {
    font-size: 1.2rem;
    text-align: center;
    color: #e63946;
    margin-bottom: 10px;
}

#leaderboard-list {
    list-style: none;
    max-height: 150px;
    overflow-y: auto;
}

#leaderboard-list li {
    display: flex;
    justify-content: space-between;
    padding: 6px 10px;
    border-bottom: 1px solid #2b3a4e;
    font-size: 0.95rem;
}