body {
    margin: 0;
    overflow: hidden;
    font-family: 'system-ui', sans-serif;
    touch-action: none; /* 브라우저 기본 터치 동작 방지 */
}
canvas {
    display: block;
    touch-action: none; /* 캔버스에서도 기본 터치 동작 방지 */
}
#gameUI {
    position: absolute;
    top: 10px;
    left: 10px;
    color: white;
    font-size: 18px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}
#crosshair {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    transform: translate(-50%, -50%);
    pointer-events: none;
}
.screen {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    color: white;
    z-index: 100;
}
/* 처음부터 설정 화면을 숨기기 위해 추가된 부분 */
#settingsScreen {
    display: none;
}
.screen h1 {
    font-size: 48px;
    margin-bottom: 20px;
}
.screen p {
    font-size: 18px;
    margin-bottom: 30px;
}
.button {
    background-color: #4CAF50;
    border: none;
    color: white;
    padding: 15px 32px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    font-size: 16px;
    margin: 4px 2px;
    cursor: pointer;
    border-radius: 5px;
}
#mobileControls {
    position: absolute;
    bottom: 20px;
    left: 20px;
    right: 20px;
    display: none;
    justify-content: space-between;
}
#joystick {
    width: 100px;
    height: 100px;
    background-color: rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    position: relative;
}
#joystickKnob {
    width: 40px;
    height: 40px;
    background-color: rgba(255, 255, 255, 0.7);
    border-radius: 50%;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}
#shootButton {
    width: 70px;
    height: 70px;
    background-color: rgba(255, 0, 0, 0.5);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: bold;
}
.health-bar {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    width: 200px;
    height: 20px;
    background-color: rgba(0, 0, 0, 0.5);
    border-radius: 10px;
    overflow: hidden;
}
.health-fill {
    height: 100%;
    background-color: #ff3333;
    width: 100%;
    transition: width 0.3s;
}
#gunEffects {
    position: absolute;
    bottom: 0;
    right: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}
#hitMarker {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: red;
    font-size: 24px;
    opacity: 0;
    transition: opacity 0.1s;
}
.settings-btn {
    position: absolute;
    top: 10px;
    right: 10px;
    background-color: rgba(255, 255, 255, 0.3);
    color: white;
    border: none;
    border-radius: 5px;
    padding: 5px 10px;
    cursor: pointer;
}
.combo-counter {
    position: absolute;
    top: 70px;
    left: 50%;
    transform: translateX(-50%);
    color: #ff9900;
    font-size: 24px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.7);
    font-weight: bold;
    opacity: 0;
    display: none;
    transition: opacity 0.3s, transform 0.2s;
}

/* v0.0.7에 추가된 스타일 */
.settings-grid {
    display: grid;
    grid-template-columns: 150px 150px;
    gap: 10px;
    margin-bottom: 20px;
}

/* 모바일 최적화 */
@media (max-width: 768px) {
    .screen h1 {
        font-size: 32px;
    }
    .screen p {
        font-size: 14px;
        margin-bottom: 15px;
    }
    .button {
        padding: 12px 24px;
    }
    .settings-grid {
        grid-template-columns: 120px 120px;
    }
}