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

body {
    background: linear-gradient(135deg, #0f0c29 0%, #302b63 50%, #24243e 100%);
    min-height: 100vh;
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
    align-items: center;
    font-family: 'Arial', 'PingFang SC', sans-serif;
    overflow: hidden;
    touch-action: none;
}

.game-wrapper {
    width: 100%;
    max-width: 500px;
    min-height: 100vh;
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 15px;
    padding-bottom: calc(15px + env(safe-area-inset-bottom));
}

.game-header {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.game-title {
    font-size: 32px;
    font-weight: 700;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 0 30px rgba(102, 126, 234, 0.5);
}

.back-btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border: none;
    color: #fff;
    padding: 12px 20px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.back-btn:active {
    transform: scale(0.95);
}

.game-info-bar {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
    gap: 10px;
}

.score-container,
.lives-container,
.level-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    padding: 10px 15px;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.15);
}

.score-label {
    font-size: 11px;
    color: rgba(255, 255, 255, 0.6);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.score-value {
    font-size: 24px;
    font-weight: 700;
    color: #fff;
    text-shadow: 0 0 10px rgba(255, 255, 255, 0.3);
}

.game-area {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
}

#game-canvas {
    background: linear-gradient(180deg, #1a1a2e 0%, #16213e 100%);
    border-radius: 12px;
    box-shadow: 
        0 0 0 2px rgba(255, 255, 255, 0.1),
        0 10px 40px rgba(0, 0, 0, 0.5),
        inset 0 0 60px rgba(102, 126, 234, 0.1);
}

.game-tips {
    margin-top: 15px;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.5);
    text-align: center;
}

.game-over-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(15, 12, 41, 0.95);
    backdrop-filter: blur(10px);
    justify-content: center;
    align-items: center;
    flex-direction: column;
    gap: 20px;
    z-index: 100;
}

.game-over-overlay.show {
    display: flex;
}

.game-over-content {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    padding: 40px;
    text-align: center;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.game-over-title {
    font-size: 32px;
    font-weight: 700;
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 20px;
}

.game-over-title.win {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    -webkit-background-clip: text;
    background-clip: text;
}

.final-score-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    margin-bottom: 30px;
}

.final-score-label {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
}

.final-score-value {
    font-size: 48px;
    font-weight: 700;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.game-over-buttons {
    display: flex;
    gap: 15px;
    justify-content: center;
}

.back-to-start-btn,
.retry-btn {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: #fff;
    padding: 14px 28px;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.retry-btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border: none;
    box-shadow: 0 4px 20px rgba(102, 126, 234, 0.4);
}

.back-to-start-btn:active,
.retry-btn:active {
    transform: scale(0.95);
}

@media (max-width: 400px) {
    .game-title {
        font-size: 26px;
    }
    
    .score-value {
        font-size: 20px;
    }
    
    .game-over-title {
        font-size: 26px;
    }
    
    .final-score-value {
        font-size: 36px;
    }
}