body {
    margin: 0;
    padding: 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    overflow: hidden;
    position: relative;
}

body::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 80%, rgba(120, 119, 198, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255, 119, 198, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(120, 219, 255, 0.2) 0%, transparent 50%);
    pointer-events: none;
}

/* 모바일 반응형 디자인 */
@media (max-width: 768px) {
    body {
        padding: 10px;
        min-height: 100vh;
        align-items: flex-start;
    }
    
    #gameContainer {
        width: 100%;
        max-width: 100vw;
        height: auto;
        border: 2px solid #333;
        border-radius: 8px;
    }
    
    #gameCanvas {
        width: 100%;
        height: auto;
        max-height: 60vh;
    }
    
    #gameInfo {
        font-size: 16px;
        top: 5px;
        left: 5px;
    }
    
    #controls {
        font-size: 12px;
        bottom: -40px;
    }
    
    #stageHint {
        font-size: 16px;
        padding: 6px 16px;
        top: -30px;
        max-width: 95vw;
    }
    
    #mobileControls {
        bottom: 10px;
        right: 10px;
        gap: 16px;
    }
    
    .key-btn {
        width: 48px;
        height: 48px;
        font-size: 1.5em;
    }
    
    #btnAttack {
        bottom: 10px;
        left: 10px;
        width: 48px;
        height: 48px;
        font-size: 1.5em;
    }
    
    /* 스케치북 모바일 최적화 */
    #sketchbook {
        top: 10px !important;
        z-index: 1000 !important;
        min-width: 120px !important;
        font-size: 13px !important;
    }
    
    #collectedJamos {
        font-size: 16px !important;
        min-height: 20px !important;
    }
    
    /* 단어 관리 UI 모바일 최적화 */
    #wordInputUI {
        top: 5px !important;
        left: 5px !important;
        right: 5px !important;
        width: auto !important;
        max-width: calc(100vw - 10px) !important;
    }
    
    #wordListUI {
        top: 40px !important;
        right: 5px !important;
        left: 5px !important;
        width: auto !important;
        max-width: calc(100vw - 10px) !important;
        max-height: 50vh !important;
    }
    
    /* 단어 관리 버튼 모바일 최적화 */
    #manageWordsBtn, #addWordBtn {
        font-size: 12px !important;
        padding: 6px 12px !important;
    }
    
    #manageWordsBtn {
        right: 5px !important;
    }
    
    #addWordBtn {
        right: 80px !important;
    }
}

#gameContainer {
    position: relative;
    border: none;
    border-radius: 20px;
    box-shadow: 
        0 20px 40px rgba(0,0,0,0.3),
        0 0 0 1px rgba(255,255,255,0.1) inset,
        0 0 0 1px rgba(0,0,0,0.1);
    background: linear-gradient(145deg, #f0f8ff, #e6f3ff);
    backdrop-filter: blur(10px);
    overflow: hidden;
    width: 1120px;
    min-width: 900px;
    max-width: 98vw;
    height: 680px;
    min-height: 650px;
    max-height: 98vh;
    padding-top: 40px;
}

#gameContainer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, transparent 30%, rgba(255,255,255,0.1) 50%, transparent 70%);
    pointer-events: none;
    z-index: 1;
}

#gameCanvas {
    display: block;
    background: linear-gradient(180deg, 
        #87CEEB 0%, 
        #87CEEB 40%, 
        #98FB98 40%, 
        #98FB98 70%, 
        #90EE90 70%, 
        #90EE90 100%);
    border-radius: 20px;
    position: relative;
    z-index: 2;
    width: 1100px;
    height: 600px;
    max-width: 100%;
    max-height: 100%;
}

@media (max-width: 1200px) {
    #gameContainer {
        width: 100vw;
        min-width: 0;
        height: auto;
        min-height: 0;
        max-width: 100vw;
        max-height: 100vh;
    }
    #gameCanvas {
        width: 100vw;
        height: auto;
        max-width: 100vw;
        max-height: 60vh;
    }
    #sketchbook {
        min-width: 120px !important;
        font-size: 13px !important;
        top: -60px !important;
    }
}

#gameInfo {
    position: absolute;
    top: 15px;
    left: 15px;
    color: #2c3e50;
    font-size: 18px;
    font-weight: 600;
    text-shadow: 0 1px 2px rgba(255,255,255,0.8);
    z-index: 10;
    background: rgba(255,255,255,0.9);
    padding: 8px 16px;
    border-radius: 12px;
    backdrop-filter: blur(5px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

#controls {
    position: absolute;
    bottom: -60px;
    left: 50%;
    transform: translateX(-50%);
    color: #333;
    text-align: center;
    font-size: 14px;
}

#stageHint {
    /* 힌트는 이제 HTML에서 인라인 스타일로 처리됨 */
    display: none; /* 기본적으로 숨김, 게임에서 필요시 표시 */
}

#mobileControls {
    position: absolute;
    bottom: 16px;
    right: 16px;
    display: flex;
    gap: 24px;
    z-index: 200;
}

#btnAttack {
    position: absolute;
    bottom: 16px;
    left: 16px;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    font-size: 2em;
    z-index: 200;
    box-shadow: 1px 1px 8px #222;
    display: flex;
    align-items: center;
    justify-content: center;
}

.cloud {
    position: absolute;
    background: white;
    border-radius: 50px;
    opacity: 0.8;
    animation: float 20s infinite linear;
}

.cloud:before {
    content: '';
    position: absolute;
    background: white;
    border-radius: 50px;
}

.cloud1 {
    width: 80px;
    height: 30px;
    top: 20px;
    left: 100px;
    animation-delay: 0s;
}

.cloud2 {
    width: 60px;
    height: 25px;
    top: 60px;
    left: 300px;
    animation-delay: -10s;
}

.key-btn {
    background: linear-gradient(145deg, rgba(255,255,255,0.9), rgba(255,255,255,0.7));
    border: none;
    color: #2c3e50;
    font-weight: 600;
    margin: 0 4px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 
        0 4px 12px rgba(0,0,0,0.15),
        0 0 0 1px rgba(255,255,255,0.2) inset;
    outline: none;
    cursor: pointer;
    backdrop-filter: blur(5px);
    border-radius: 12px;
}

.key-btn:active {
    background: linear-gradient(145deg, rgba(255,255,255,0.7), rgba(255,255,255,0.5));
    transform: translateY(2px);
    box-shadow: 
        0 2px 6px rgba(0,0,0,0.2),
        0 0 0 1px rgba(255,255,255,0.1) inset;
}

.key-btn:hover {
    background: linear-gradient(145deg, rgba(255,255,255,1), rgba(255,255,255,0.9));
    box-shadow: 
        0 6px 16px rgba(0,0,0,0.2),
        0 0 0 1px rgba(255,255,255,0.3) inset;
}

@keyframes float {
    0% { transform: translateX(-100px); }
    100% { transform: translateX(900px); }
} 

#sketchbook {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(255,255,255,0.95);
    padding: 10px;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
    z-index: 1000;
    min-width: 200px;
    text-align: center;
}