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

body {
    font-family: 'Arial', sans-serif;
    background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
    color: #fff;
    min-height: 100vh;
    padding: 20px;
}

.main-wrapper {
    display: flex;
    justify-content: center;
    align-items: flex-start;
    gap: 30px;
    max-width: 1400px;
    margin: 0 auto;
}

.container {
    text-align: center;
    background: rgba(0, 0, 0, 0.3);
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    flex-shrink: 0;
}

h1 {
    font-size: 3em;
    margin-bottom: 20px;
    text-shadow: 3px 3px 6px rgba(0, 0, 0, 0.5);
    color: #ffd700;
}

.game-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding: 10px 20px;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 10px;
    gap: 15px;
    flex-wrap: wrap;
}

.score {
    font-size: 1.5em;
    font-weight: bold;
}

.level {
    font-size: 1.5em;
    font-weight: bold;
    color: #ffd700;
}

#status {
    font-size: 1.2em;
    color: #ffd700;
}

#gameCanvas {
    border: 3px solid #ffd700;
    border-radius: 10px;
    background: #000;
    display: block;
    margin: 0 auto;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.5);
}

.user-input-section {
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.user-input-section label {
    font-size: 1.1em;
    font-weight: bold;
}

#username {
    padding: 8px 15px;
    font-size: 1em;
    border: 2px solid #ffd700;
    border-radius: 8px;
    background: rgba(0, 0, 0, 0.3);
    color: #fff;
    outline: none;
    max-width: 200px;
}

#username:focus {
    border-color: #ffed4e;
    box-shadow: 0 0 10px rgba(255, 215, 0, 0.5);
}

.instructions {
    margin-top: 20px;
    font-size: 1.1em;
}

.leaderboard-container {
    background: rgba(0, 0, 0, 0.3);
    padding: 25px;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    min-width: 300px;
    max-height: 700px;
}

.leaderboard-container h2 {
    color: #ffd700;
    text-align: center;
    margin-bottom: 20px;
    font-size: 2em;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

#leaderboard {
    max-height: 600px;
    overflow-y: auto;
}

.leaderboard-item {
    background: rgba(255, 255, 255, 0.1);
    padding: 12px;
    margin-bottom: 10px;
    border-radius: 8px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-left: 4px solid #ffd700;
}

.leaderboard-item.top {
    background: rgba(255, 215, 0, 0.2);
    border-left-color: #ffed4e;
    font-weight: bold;
}

.leaderboard-rank {
    font-size: 1.3em;
    font-weight: bold;
    color: #ffd700;
    min-width: 30px;
}

.leaderboard-name {
    flex: 1;
    text-align: left;
    margin-left: 15px;
    font-size: 1.1em;
}

.leaderboard-score {
    font-size: 1.2em;
    font-weight: bold;
    color: #ffd700;
    min-width: 80px;
    text-align: right;
}

.empty-leaderboard {
    text-align: center;
    color: #aaa;
    padding: 20px;
    font-style: italic;
}

#restartBtn {
    margin-top: 15px;
    padding: 12px 30px;
    font-size: 1.2em;
    background: #ffd700;
    color: #000;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-weight: bold;
    transition: background 0.3s;
}

#restartBtn:hover {
    background: #ffed4e;
}

#restartBtn:active {
    transform: scale(0.95);
}

footer {
    text-align: center;
    margin-top: 30px;
    padding: 20px;
    color: #ffd700;
    font-size: 1.1em;
    font-weight: bold;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

@media (max-width: 1200px) {
    .main-wrapper {
        flex-direction: column;
        align-items: center;
    }
    
    .leaderboard-container {
        width: 100%;
        max-width: 600px;
    }
}

@media (max-width: 700px) {
    #gameCanvas {
        width: 100%;
        height: auto;
    }
    
    h1 {
        font-size: 2em;
    }
    
    .game-info {
        flex-direction: column;
        gap: 10px;
    }
    
    .user-input-section {
        flex-direction: column;
        gap: 8px;
    }
}