style.css

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background-color: #f0f0f0;
    color: #333;
}

:root {
    --primary-color: #FF7F00;  /* 주황색 포인트 컬러 */
}

.container {
    max-width: 1200px;
    margin: 20px auto;
    padding: 20px;
    background-color: white;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
    border-radius: 8px;
    display: flex;
    flex-direction: column;
}

h1, h2, h3 {
    color: #2c3e50;
    text-align: center;
}

p {
    text-align: center;
    margin-bottom: 20px;
}

.upload-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-around;
    margin-bottom: 20px;
    gap: 20px;
}

.upload-box {
    flex: 1;
    min-width: 300px;
    border: 2px dashed var(--primary-color);  /* 주황색 테두리 */
    border-radius: 5px;
    padding: 20px;
    text-align: center;
    transition: background-color 0.3s;
}

.upload-box:hover {
    background-color: #ecf0f1;
}

.upload-label {
    display: block;
    font-weight: bold;
    margin-bottom: 10px;
    color: var(--primary-color);  /* 주황색 레이블 */
}

.file-input {
    display: none;
}

.upload-button {
    display: inline-block;
    background-color: var(--primary-color);  /* 주황색 버튼 */
    color: white;
    padding: 10px 20px;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s;
}

.upload-button:hover {
    background-color: #E67300;  /* 주황색 버튼 호버 */
}

/* 작업 영역 래퍼 */
.workspace-wrapper {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    margin-bottom: 20px;
}

/* 캔버스와 컨트롤 패널들을 묶는 영역 */
.canvas-and-controls {
    flex: 3;
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.canvas-container {
    position: relative;
    width: 100%;
    border: 2px solid #333;
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 20px;
}

#canvas {
    display: block;
    width: 100%;
    height: auto;
    background-color: #ffffff;
    cursor: default;
}

/* 컨트롤 패널들을 모아두는 사이드바 역할 */
.control-panel-sidebar {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.control-group {
    display: flex;
    flex-direction: column;
    border: 1px solid #ddd;
    padding: 15px;
    border-radius: 5px;
    background-color: #f9f9f9;
}

.control-group h3 {
    margin: 0 0 15px 0;
    font-size: 1rem;
    text-align: center;
    width: 100%;
    color: var(--primary-color);  /* 주황색 제목 */
}

.slider-container {
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 8px 0;
    width: 100%;
    padding: 0 5px;
    box-sizing: border-box;
}

.slider-container label {
    font-weight: bold;
    min-width: 50px;
    text-align: left;
    flex-shrink: 0;
}

.slider-container input[type="range"] {
    flex-grow: 1;
    width: auto;
    margin: 0 5px;
    -webkit-appearance: none;
    background: white;
    border-radius: 10px;
    height: 6px;
    border: 1px solid #ddd;
}

/* 슬라이더 바 주황색 */
.slider-container input[type="range"]::-webkit-slider-runnable-track {
    width: 100%;
    height: 6px;
    background: white;
    border-radius: 10px;
}

/* 슬라이더 동그라미 부분 */
.slider-container input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--primary-color);
    margin-top: -6px;
    cursor: pointer;
    border: 2px solid white;
    box-shadow: 0 1px 3px rgba(0,0,0,0.2);
}

/* Firefox 슬라이더 스타일 */
.slider-container input[type="range"]::-moz-range-track {
    width: 100%;
    height: 6px;
    background: white;
    border-radius: 10px;
}

.slider-container input[type="range"]::-moz-range-thumb {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    border: 2px solid white;
    box-shadow: 0 1px 3px rgba(0,0,0,0.2);
}

/* Edge/IE 슬라이더 스타일 */
.slider-container input[type="range"]::-ms-track {
    width: 100%;
    height: 6px;
    background: transparent;
    border-color: transparent;
    border-width: 10px 0;
    color: transparent;
}

.slider-container input[type="range"]::-ms-fill-lower {
    background: white;
    border-radius: 10px;
}

.slider-container input[type="range"]::-ms-fill-upper {
    background: white;
    border-radius: 10px;
}

.slider-container input[type="range"]::-ms-thumb {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    border: 2px solid white;
    box-shadow: 0 1px 3px rgba(0,0,0,0.2);
}

/* 레이어 목록 스타일 */
.layers-list {
    width: 100%;
    max-height: 150px;
    overflow-y: auto;
    border: 1px solid #ddd;
    border-radius: 4px;
}

.layer-item {
    padding: 8px;
    border-bottom: 1px solid #eee;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.layer-item:last-child { border-bottom: none; }
.layer-item:hover { background-color: #f5f5f5; }
.layer-item.active { background-color: #FFF0E6; font-weight: bold; color: var(--primary-color); }  /* 주황색 강조 */
.layer-name { flex-grow: 1; padding-left: 5px; }
.layer-controls { display: flex; gap: 5px; }
.layer-button {
    background-color: #f0f0f0; 
    border: 1px solid #ddd; 
    border-radius: 3px;
    padding: 2px 5px; 
    cursor: pointer; 
    font-size: 11px; 
    color: #555;
    transition: all 0.2s ease;
}
.layer-button:hover { 
    background-color: var(--primary-color);  /* 주황색 버튼 호버 */
    color: white; 
}

/* 필터 패널 스타일 */
.filter-panel {
    padding: 15px;
    border: 1px solid #ddd;
    border-radius: 5px;
    background-color: #f9f9f9;
}
.filter-panel h3 { 
    margin: 0 0 15px 0; 
    text-align: center; 
    color: var(--primary-color);  /* 주황색 제목 */
}
.filter-sliders { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 15px; }
.filter-slider-container { display: flex; flex-direction: column; gap: 5px; width: 100%; padding: 0 5px; box-sizing: border-box; }
.filter-slider-container label { font-size: 14px; margin-bottom: 5px; text-align: left; }
.large-slider { 
    width: 100%; 
    height: 20px;
    accent-color: var(--primary-color);  /* 주황색 슬라이더 */
}
.filter-slider-container .value-display { 
    text-align: right; 
    font-weight: bold;
    color: var(--primary-color);  /* 주황색 값 표시 */
}
.filter-buttons { display: flex; justify-content: center; margin-top: 15px; }
#reset-filter-btn { width: auto; padding: 8px 15px; flex-grow: 1; max-width: 200px; }

/* 미리보기 섹션 */
.preview-section {
    flex: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    min-width: 0;
}

.preview-container {
    width: 100%;
    margin-top: 0;
    display: none;
    flex-direction: column;
    align-items: center;
    padding: 10px;
    border: 1px dashed #ccc;
    border-radius: 4px;
    background-color: #f9f9f9;
}

.preview-container h3 {
    margin-bottom: 10px;
    color: var(--primary-color);  /* 주황색 제목 */
}

#preview-img {
    max-width: 100%;
    max-height: 400px;
    border: 2px solid #333;
    border-radius: 4px;
    object-fit: contain;
}

/* 하단 버튼 컨테이너 */
.button-container {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-top: 20px;
    flex-wrap: wrap;
}

button {
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-weight: bold;
    transition: background-color 0.3s;
}

.primary-btn { background-color: var(--primary-color); color: white; }  /* 주황색 버튼 */
.primary-btn:hover { background-color: #E67300; }  /* 주황색 버튼 호버 */
.danger-btn { background-color: #e74c3c; color: white; }
.danger-btn:hover { background-color: #c0392b; }
.info-btn { background-color: var(--primary-color); color: white; }  /* 주황색 버튼 */
.info-btn:hover { background-color: #E67300; }  /* 주황색 버튼 호버 */

/* 예시 이미지 스타일 */
#example-images-container img {
    width: 160px; 
    height: 160px; 
    cursor: pointer; 
    border: 1px solid #ccc;
    transition: border-color 0.3s;
}

#example-images-container img:hover {
    border-color: var(--primary-color);  /* 주황색 테두리 호버 */
}

/* 스크롤바 스타일링 */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.05);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb {
    background: var(--primary-color);  /* 주황색 스크롤바 */
    border-radius: 10px;
}

/* 모바일 대응 */
@media (max-width: 900px) {
    .workspace-wrapper {
        flex-direction: column;
        align-items: center;
    }
    .canvas-and-controls, .preview-section {
        flex-basis: auto;
        width: 100%;
        max-width: 600px;
    }
    .control-panel-sidebar {
        width: 100%;
    }
    .filter-sliders {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .upload-container {
        flex-direction: column;
    }
    .upload-box {
        width: 100%;
        margin-bottom: 10px;
    }
}