/* 픽셀 아트 컬러링 스타일 */
.coloring-container {
    max-width: 900px;
    margin: 0 auto;
    padding: 40px 20px 80px;
    min-height: 100vh;
    padding-bottom: calc(50px + 20px);
}

.coloring-header {
    text-align: center;
    margin-bottom: 30px;
}

.coloring-title {
    font-size: 42px;
    font-weight: 700;
    color: #2D2D2D;
    margin-bottom: 12px;
    text-shadow: 0 2px 4px rgba(255, 255, 255, 0.8), 0 0 10px rgba(255, 182, 193, 0.5);
}

.coloring-subtitle {
    font-size: 18px;
    color: #5A5A5A;
    font-weight: 500;
    text-shadow: 0 1px 2px rgba(255, 255, 255, 0.8);
}

/* 캔버스 크기 선택 */
.canvas-size-selector {
    background: white;
    border-radius: var(--radius-xl);
    padding: 24px;
    margin-bottom: 30px;
    box-shadow: var(--shadow-md);
    border: 2px solid rgba(255, 182, 193, 0.2);
}

.selector-title {
    font-size: 18px;
    font-weight: 600;
    color: #2D2D2D;
    margin-bottom: 16px;
    text-align: center;
}

.size-buttons {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
}

.size-btn {
    padding: 12px 20px;
    background: rgba(255, 182, 193, 0.1);
    border: 2px solid rgba(255, 182, 193, 0.3);
    border-radius: var(--radius-md);
    font-size: 16px;
    font-weight: 500;
    color: #2D2D2D;
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: 'Pretendard', sans-serif;
}

.size-btn:hover {
    background: rgba(255, 182, 193, 0.2);
    border-color: var(--primary-pink);
    transform: translateY(-2px);
}

.size-btn.active {
    background: var(--primary-gradient);
    color: #2D2D2D;
    border-color: var(--primary-pink);
    font-weight: 700;
    box-shadow: 0 4px 12px rgba(255, 182, 193, 0.3);
    text-shadow: 0 1px 2px rgba(255, 255, 255, 0.5);
}

/* 캔버스 영역 */
.canvas-section {
    margin-bottom: 30px;
}

.canvas-wrapper {
    background: white;
    border-radius: var(--radius-xl);
    padding: 30px;
    box-shadow: var(--shadow-lg);
    border: 2px solid rgba(255, 182, 193, 0.2);
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
    width: 100%;
}

.canvas {
    display: grid;
    gap: 2px;
    background: #F5F5F5;
    padding: 10px;
    border-radius: var(--radius-md);
    margin: 0 auto;
}

.pixel {
    /* width와 height는 JavaScript에서 동적으로 설정 */
    background: white;
    border: 1px solid rgba(0, 0, 0, 0.1);
    cursor: pointer;
    transition: all 0.1s ease;
    position: relative;
    box-sizing: border-box;
    user-select: none;
    -webkit-user-select: none;
    min-width: 0;
    min-height: 0;
}

.pixel:hover {
    transform: scale(1.05);
    z-index: 10;
    box-shadow: 0 2px 8px rgba(255, 182, 193, 0.4);
}

.pixel.filled {
    border-color: rgba(0, 0, 0, 0.2);
}


/* 도구 버튼 */
.tool-buttons {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 30px;
}

.tool-btn {
    padding: 12px 24px;
    background: var(--primary-gradient);
    color: #2D2D2D;
    border: 2px solid rgba(255, 182, 193, 0.3);
    border-radius: var(--radius-md);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: 'Pretendard', sans-serif;
    text-shadow: 0 1px 2px rgba(255, 255, 255, 0.5);
    box-shadow: 0 2px 8px rgba(255, 182, 193, 0.2);
}

.tool-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(255, 182, 193, 0.4);
    border-color: var(--primary-pink);
}

.tool-btn:active {
    transform: translateY(0);
}

/* 색상 팔레트 */
.palette-section {
    background: white;
    border-radius: var(--radius-xl);
    padding: 24px;
    margin-bottom: 30px;
    box-shadow: var(--shadow-md);
    border: 2px solid rgba(255, 182, 193, 0.2);
}

.palette-title {
    font-size: 18px;
    font-weight: 600;
    color: #2D2D2D;
    margin-bottom: 16px;
    text-align: center;
}

.palette {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
}

.color-btn {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    border: 3px solid rgba(0, 0, 0, 0.1);
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    position: relative;
}

.color-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.color-btn.selected {
    border-color: #2D2D2D;
    border-width: 4px;
    transform: scale(1.15);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
}

.color-btn.selected::after {
    content: '✓';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
    font-size: 20px;
    font-weight: 700;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
}


/* 반응형 디자인 */
@media (max-width: 768px) {
    .coloring-container {
        padding: 30px 15px 70px;
    }

    .coloring-title {
        font-size: 32px;
    }

    .coloring-subtitle {
        font-size: 16px;
    }

    .canvas-size-selector,
    .palette-section {
        padding: 20px;
    }
    
    .tool-buttons {
        gap: 8px;
    }
    
    .tool-btn {
        padding: 10px 18px;
        font-size: 14px;
    }

    .canvas-wrapper {
        padding: 20px;
    }

    .color-btn {
        width: 40px;
        height: 40px;
    }
}

@media (max-width: 480px) {
    .color-btn {
        width: 35px;
        height: 35px;
    }
}