@import url('https://cdn.jsdelivr.net/gh/orioncactus/pretendard/dist/web/static/pretendard.css');

:root {
    --bg-color: #f5f6f8;
    --panel-bg: #ffffff;
    --border-color: #e1e4e8;
    --text-primary: #2d3436;
    --text-secondary: #586069;
    --accent-color: #0366d6;
    --accent-hover: #005cc5;
    --danger-color: #cb2431;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Pretendard', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    height: 100vh;
    display: flex;
    flex-direction: column;
}

/* 레이아웃 구조 */
.editor-container {
    display: flex;
    flex-direction: column;
    height: 100%;
}

.editor-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 24px;
    height: 60px;
    background-color: var(--panel-bg);
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
    z-index: 10;
}

.editor-header h1 {
    font-size: 1.2rem;
    font-weight: 700;
}

.editor-main {
    display: flex;
    flex: 1;
    overflow: hidden;
}

/* 툴바 패널 */
.toolbar {
    width: 300px;
    background-color: var(--panel-bg);
    border-right: 1px solid var(--border-color);
    overflow-y: auto;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.tool-section h3 {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 8px;
}

/* 버튼 스타일 */
.btn {
    display: inline-block;
    padding: 8px 12px;
    font-size: 0.9rem;
    font-weight: 600;
    text-align: center;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background-color: var(--panel-bg);
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.2s;
    width: 100%;
}

.btn:hover {
    background-color: #f3f4f6;
}

.btn.primary {
    background-color: var(--accent-color);
    color: white;
    border-color: var(--accent-color);
}

.btn.primary:hover {
    background-color: var(--accent-hover);
}

.upload-btn {
    background-color: #f1f8ff;
    color: var(--accent-color);
    border-color: #c8e1ff;
    padding: 12px;
}

.upload-btn:hover {
    background-color: #dbedff;
}

/* 필터 슬라이더 컨트롤 */
.control-group {
    margin-bottom: 15px;
}

.control-group label {
    display: flex;
    justify-content: space-between;
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 6px;
}

.control-group label span {
    color: var(--accent-color);
}

input[type="range"] {
    width: 100%;
    accent-color: var(--accent-color);
}

.quick-filters {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    margin-top: 15px;
}

.transform-controls {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}

#reset-filters {
    color: var(--danger-color);
    border-color: rgba(203, 36, 49, 0.2);
}

/* 캔버스 (미리보기) 영역 */
.canvas-container {
    flex: 1;
    background-color: #e1e4e8;
    background-image: 
        linear-gradient(45deg, #ccc 25%, transparent 25%, transparent 75%, #ccc 75%, #ccc),
        linear-gradient(45deg, #ccc 25%, transparent 25%, transparent 75%, #ccc 75%, #ccc);
    background-size: 20px 20px;
    background-position: 0 0, 10px 10px;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 40px;
    overflow: auto;
    position: relative;
}

.placeholder-text {
    font-size: 1.2rem;
    color: var(--text-secondary);
    text-align: center;
    pointer-events: none;
    background: rgba(255,255,255,0.8);
    padding: 20px 40px;
    border-radius: 12px;
    border: 2px dashed #999;
}

#image-preview {
    max-width: 100%;
    max-height: 100%;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    transition: transform 0.2s ease;
    /* CSS 필터가 JS를 통해 인라인으로 적용됩니다 */
}