:root {
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --bg: #0f172a;
    --sidebar-bg: #111827;
    --card-bg: #1e293b;
    --text: #f8fafc;
    --text-muted: #94a3b8;
    --border: #334155;
    --area-color: rgba(99, 102, 241, 0.35);
    --area-border: #6366f1;
    --area-selected: rgba(251, 146, 60, 0.35);
    --area-selected-border: #fb923c;
    --drawing-color: rgba(99, 102, 241, 0.2);
    --drawing-border: #818cf8;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg);
    color: var(--text);
    height: 100vh;
    overflow: hidden;
}

#app {
    display: flex;
    height: 100vh;
}

/* ─── Sidebar ─── */
.sidebar {
    width: 300px;
    flex-shrink: 0;
    background: var(--sidebar-bg);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.sidebar header {
    padding: 1.25rem 1.25rem 0;
    flex-shrink: 0;
}

.sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--border);
    padding-bottom: 1rem;
    margin-bottom: 0;
}

.sidebar h1 {
    font-size: 1rem;
    font-weight: 800;
    color: #818cf8;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.controls {
    flex: 1;
    overflow-y: auto;
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 0;
}

.control-group {
    margin-bottom: 1.25rem;
    padding: 0.75rem;
    border-radius: 0.5rem;
    background: rgba(255,255,255,0.03);
}

.control-group > label {
    display: block;
    font-size: 0.8rem;
    font-weight: 600;
    color: #e2e8f0;
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.control-group input[type="text"],
.control-group select {
    width: 100%;
    padding: 0.5rem 0.65rem;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 0.4rem;
    color: var(--text);
    font-size: 0.85rem;
    outline: none;
}

.control-group input[type="text"]:focus,
.control-group select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(99,102,241,0.2);
}

/* URL 입력 행 */
.url-input-row {
    display: flex;
    gap: 0.4rem;
    margin-top: 0.4rem;
}

.url-input-row input[type="text"] {
    flex: 1;
    padding: 0.45rem 0.6rem;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 0.4rem;
    color: var(--text);
    font-size: 0.78rem;
    outline: none;
    min-width: 0;
}

.url-input-row input[type="text"]:focus {
    border-color: var(--primary);
}

.url-input-row input[type="text"]::placeholder {
    color: #475569;
    font-size: 0.72rem;
}

.btn-url-load {
    background: var(--card-bg);
    border: 1px solid var(--border);
    color: var(--text-muted);
    padding: 0.45rem 0.6rem;
    border-radius: 0.4rem;
    font-size: 0.75rem;
    cursor: pointer;
    white-space: nowrap;
    flex-shrink: 0;
}

.btn-url-load:hover {
    border-color: var(--primary);
    color: var(--text);
}

.url-error {
    font-size: 0.72rem;
    color: #f87171;
    margin-top: 0.3rem;
}

/* 파일 업로드 */
.file-upload-label {
    display: block;
    padding: 0.65rem;
    background: var(--card-bg);
    border: 1px dashed var(--border);
    border-radius: 0.4rem;
    text-align: center;
    cursor: pointer;
    font-size: 0.8rem;
    color: var(--text-muted);
    transition: border-color 0.2s, color 0.2s;
}

.file-upload-label:hover {
    border-color: var(--primary);
    color: var(--text);
}

.file-upload-label input[type="file"] {
    display: none;
}

#file-name-display {
    pointer-events: none;
}

/* 영역 목록 헤더 */
.area-group-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.5rem;
}

.area-group-header label {
    margin-bottom: 0 !important;
}

.btn-undo {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-muted);
    padding: 0.2rem 0.5rem;
    border-radius: 0.35rem;
    font-size: 0.72rem;
    cursor: pointer;
}

.btn-undo:hover:not(:disabled) {
    border-color: #fb923c;
    color: #fb923c;
}

.btn-undo:disabled {
    opacity: 0.35;
    cursor: not-allowed;
}

/* 영역 목록 */
#area-list {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    max-height: 280px;
    overflow-y: auto;
}

.area-empty {
    font-size: 0.78rem;
    color: var(--text-muted);
    text-align: center;
    padding: 0.75rem 0;
    line-height: 1.6;
}

.area-item {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 0.4rem;
    padding: 0.5rem 0.6rem;
    cursor: pointer;
    transition: border-color 0.15s;
}

.area-item:hover,
.area-item.selected {
    border-color: var(--primary);
}

.area-item-header {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    margin-bottom: 0.35rem;
}

.area-badge {
    background: var(--primary);
    color: white;
    font-size: 0.68rem;
    font-weight: 700;
    width: 1.3rem;
    height: 1.3rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.area-coords {
    font-size: 0.68rem;
    color: var(--text-muted);
    font-family: monospace;
    flex: 1;
}

.area-delete {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 0.8rem;
    padding: 0 0.1rem;
    line-height: 1;
}

.area-delete:hover {
    color: #f87171;
}

.area-url-input {
    width: 100%;
    padding: 0.3rem 0.5rem;
    background: rgba(255,255,255,0.05);
    border: 1px solid var(--border);
    border-radius: 0.3rem;
    color: var(--text);
    font-size: 0.75rem;
    outline: none;
    margin-bottom: 0.25rem;
}

.area-url-input:focus {
    border-color: var(--primary);
}

.area-url-input::placeholder {
    color: #475569;
}

/* 이미지 슬롯 목록 */
#slot-list {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    max-height: 180px;
    overflow-y: auto;
}

.slot-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 0.5rem;
    border: 1px solid var(--border);
    border-radius: 0.35rem;
    cursor: pointer;
    transition: border-color 0.15s;
}

.slot-item:hover,
.slot-item.active {
    border-color: var(--primary);
}

.slot-item.active {
    background: rgba(99, 102, 241, 0.08);
}

.slot-thumb {
    width: 42px;
    height: 32px;
    object-fit: cover;
    border-radius: 0.2rem;
    border: 1px solid var(--border);
    flex-shrink: 0;
}

.slot-info {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.1rem;
    min-width: 0;
}

.slot-name {
    font-size: 0.72rem;
    color: var(--text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.slot-map {
    font-size: 0.65rem;
    color: var(--text-muted);
    font-family: monospace;
}

.slot-delete {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 0.8rem;
    padding: 0 0.1rem;
    line-height: 1;
    flex-shrink: 0;
}

.slot-delete:hover {
    color: #f87171;
}

/* 외부 반출 체크박스 */
.export-check-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    font-size: 0.82rem;
    color: var(--text);
}

.export-check-label input[type="checkbox"] {
    width: 1rem;
    height: 1rem;
    accent-color: var(--primary);
    cursor: pointer;
}

.export-hint {
    font-size: 0.72rem;
    color: var(--text-muted);
    margin-top: 0.3rem;
}

/* HTML 다운로드 버튼 */
.btn-secondary-dl {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-muted);
    padding: 0.5rem 1rem;
    border-radius: 0.4rem;
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    transition: border-color 0.2s, color 0.2s;
    text-decoration: none;
}

.btn-secondary-dl:hover {
    border-color: var(--primary);
    color: var(--text);
}

/* 버튼들 */
.btn-primary {
    background: var(--primary);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 0.4rem;
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
    text-decoration: none;
}

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

.btn-reset {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-muted);
    padding: 0.3rem 0.65rem;
    border-radius: 0.35rem;
    font-size: 0.72rem;
    cursor: pointer;
}

.btn-reset:hover {
    border-color: var(--text-muted);
    color: var(--text);
}

/* ─── Content ─── */
.content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background: #f1f5f9;
    padding: 1.25rem;
    gap: 1rem;
}

.canvas-section {
    flex: 1;
    background: white;
    border-radius: 0.75rem;
    border: 1px solid #cbd5e1;
    box-shadow: 0 2px 4px rgba(0,0,0,0.06);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    min-height: 0;
}

.canvas-section header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    border-bottom: 1px solid #e2e8f0;
    flex-shrink: 0;
}

.canvas-section h2 {
    font-size: 0.9rem;
    color: #1e293b;
    font-weight: 700;
}

.hint {
    font-size: 0.75rem;
    color: #94a3b8;
}

.canvas-container {
    flex: 1;
    overflow: auto;
    position: relative;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding: 1rem;
    background: #f8fafc;
}

/* 드롭존 */
.drop-zone {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    width: 100%;
    height: 100%;
    min-height: 220px;
    border: 2px dashed #cbd5e1;
    border-radius: 0.75rem;
    color: #94a3b8;
    transition: border-color 0.2s, background 0.2s;
}

.drop-zone.drag-over {
    border-color: var(--primary);
    background: rgba(99,102,241,0.05);
    color: var(--primary);
}

.drop-icon { font-size: 2.5rem; }

.drop-zone p {
    font-size: 0.85rem;
    text-align: center;
}

/* 이미지 래퍼 */
.img-wrapper {
    position: relative;
    display: inline-block;
    line-height: 0;
    user-select: none;
    cursor: crosshair;
    max-width: 100%;
}

.img-wrapper img {
    display: block;
    max-width: 100%;
    height: auto;
    pointer-events: none;
    border: 1px solid #e2e8f0;
    border-radius: 0.25rem;
}

/* 오버레이 (영역 그리기) */
.overlay {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.area-rect {
    position: absolute;
    background: var(--area-color);
    border: 2px solid var(--area-border);
    border-radius: 2px;
    box-sizing: border-box;
    transition: background 0.15s, border-color 0.15s;
    pointer-events: auto;
    cursor: move;
}

/* 리사이즈 핸들 */
.resize-handle {
    position: absolute;
    width: 8px;
    height: 8px;
    background: white;
    border: 2px solid var(--area-selected-border);
    border-radius: 1px;
    box-sizing: border-box;
    z-index: 10;
}
.handle-nw { top: -5px;  left: -5px;              cursor: nw-resize; }
.handle-n  { top: -5px;  left: calc(50% - 4px);   cursor: n-resize;  }
.handle-ne { top: -5px;  right: -5px;              cursor: ne-resize; }
.handle-e  { top: calc(50% - 4px); right: -5px;   cursor: e-resize;  }
.handle-se { bottom: -5px; right: -5px;            cursor: se-resize; }
.handle-s  { bottom: -5px; left: calc(50% - 4px); cursor: s-resize;  }
.handle-sw { bottom: -5px; left: -5px;             cursor: sw-resize; }
.handle-w  { top: calc(50% - 4px); left: -5px;    cursor: w-resize;  }

.area-rect.selected {
    background: var(--area-selected);
    border-color: var(--area-selected-border);
}

.area-rect .rect-label {
    position: absolute;
    top: 2px;
    left: 3px;
    background: var(--area-border);
    color: white;
    font-size: 10px;
    font-weight: 700;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
}

.area-rect.selected .rect-label {
    background: var(--area-selected-border);
}

/* 그리는 중인 임시 rect */
#drawing-rect {
    position: absolute;
    background: var(--drawing-color);
    border: 2px dashed var(--drawing-border);
    border-radius: 2px;
    box-sizing: border-box;
    pointer-events: none;
    display: none;
}

/* ─── Code Section ─── */
.code-section {
    background: white;
    border-radius: 0.75rem;
    border: 1px solid #cbd5e1;
    box-shadow: 0 2px 4px rgba(0,0,0,0.06);
    flex-shrink: 0;
}

.code-section header {
    display: flex;
    align-items: center;
    padding: 0.65rem 1rem;
    border-bottom: 1px solid #e2e8f0;
}

.code-actions {
    margin-left: auto;
    display: flex;
    gap: 0.5rem;
}

.code-section h2 {
    font-size: 0.9rem;
    color: #1e293b;
    font-weight: 700;
}

#code-display {
    display: block;
    max-height: 140px;
    overflow-y: auto;
    font-size: 0.78rem;
    font-family: 'Fira Code', 'Courier New', monospace;
    padding: 0.75rem 1rem;
    background: #f8fafc;
    color: #334155;
    white-space: pre-wrap;
    word-break: break-all;
    line-height: 1.5;
}

/* ─── Scrollbar ─── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }