/* 전역 box-sizing */
.file-batch-renamer-container,
.file-batch-renamer-container *,
.file-batch-renamer-container *::before,
.file-batch-renamer-container *::after {
  box-sizing: border-box;
}

/* CSS 변수 - 라이트 모드 */
.file-batch-renamer-container {
  /* 배경색 */
  --bg-primary: #f5f5f0;
  --bg-secondary: #fff;
  --bg-section: #fff;
  
  /* 테두리 */
  --border-color: #333;
  
  /* 텍스트 */
  --text-primary: #222;
  --text-secondary: #555;
  --text-light: #666;
  
  /* 브랜드 색상 */
  --color-accent: #3498db;
  --color-success: #27ae60;
  --color-warning: #f39c12;
  --color-danger: #e74c3c;
  --color-purple: #9b59b6;
  --color-teal: #1abc9c;
  
  /* 그림자 (네오브루탈리즘) */
  --shadow-sm: 2px 2px 0 rgba(0,0,0,0.1);
  --shadow-md: 4px 4px 0 rgba(0,0,0,0.15);
  --shadow-lg: 8px 8px 0 rgba(0,0,0,0.15);
  
  /* 입력 포커스 */
  --input-focus-bg: #fffacd;
  
  /* 헤더 타이틀 */
  --title-color: #2c3e50;
  --title-shadow: 2px 2px 0 rgba(255,255,255,0.5);
  
  /* 버튼 호버 배경 */
  --btn-hover-overlay: rgba(0,0,0,0.1);
  
  /* 복사 버튼 배경 */
  --copy-btn-bg: #fff;
  --copy-btn-hover-bg: #f0f0f0;
  
  /* 통계 배경 */
  --stats-bg: #f8fafc;
  
  /* 업로드 영역 */
  --upload-area-bg: #fafafa;
  --upload-area-hover-bg: #f5f5f5;
  --upload-area-dragover-bg: #e8f4fd;
  
  /* 차트 텍스트 */
  --chart-text-color: #334155;
}

/* 수동 다크 모드 */
.file-batch-renamer-container.dark {
  --bg-primary: #1a1a1a;
  --bg-secondary: #2d2d2d;
  --bg-section: #2d2d2d;
  --border-color: #e0e0e0;
  --text-primary: #e8e8e8;
  --text-secondary: #b0b0b0;
  --text-light: #909090;
  --color-accent: #5dade2;
  --color-success: #52c77a;
  --color-warning: #f5b041;
  --color-danger: #ec7063;
  --color-purple: #af7ac5;
  --color-teal: #48d1cc;
  --shadow-sm: 2px 2px 0 rgba(255,255,255,0.08);
  --shadow-md: 4px 4px 0 rgba(255,255,255,0.12);
  --shadow-lg: 8px 8px 0 rgba(255,255,255,0.12);
  --input-focus-bg: #3a3a3a;
  --title-color: #7fb3d5;
  --title-shadow: 2px 2px 0 rgba(0,0,0,0.5);
  --btn-hover-overlay: rgba(255,255,255,0.1);
  --copy-btn-bg: #3a3a3a;
  --copy-btn-hover-bg: #4a4a4a;
  --stats-bg: #252525;
  --upload-area-bg: #252525;
  --upload-area-hover-bg: #2a2a2a;
  --upload-area-dragover-bg: #2a3a4a;
  --chart-text-color: #b0b0b0;
}

/* 시스템 다크모드 자동 감지 */
@media (prefers-color-scheme: dark) {
  .file-batch-renamer-container:not(.dark):not(.light) {
    --bg-primary: #1a1a1a;
    --bg-secondary: #2d2d2d;
    --bg-section: #2d2d2d;
    --border-color: #e0e0e0;
    --text-primary: #e8e8e8;
    --text-secondary: #b0b0b0;
    --text-light: #909090;
    --color-accent: #5dade2;
    --color-success: #52c77a;
    --color-warning: #f5b041;
    --color-danger: #ec7063;
    --color-purple: #af7ac5;
    --color-teal: #48d1cc;
    --shadow-sm: 2px 2px 0 rgba(255,255,255,0.08);
    --shadow-md: 4px 4px 0 rgba(255,255,255,0.12);
    --shadow-lg: 8px 8px 0 rgba(255,255,255,0.12);
    --input-focus-bg: #3a3a3a;
    --title-color: #7fb3d5;
    --title-shadow: 2px 2px 0 rgba(0,0,0,0.5);
    --btn-hover-overlay: rgba(255,255,255,0.1);
    --copy-btn-bg: #3a3a3a;
    --copy-btn-hover-bg: #4a4a4a;
    --stats-bg: #252525;
    --upload-area-bg: #252525;
    --upload-area-hover-bg: #2a2a2a;
    --upload-area-dragover-bg: #2a3a4a;
    --chart-text-color: #b0b0b0;
  }
}

/* 메인 컨테이너 */
.file-batch-renamer-container {
  position: relative;
  max-width: 1180px;
  width: 100%;
  margin: 15px auto;
  padding: 12px;
  background: var(--bg-primary);
  border: 2px solid var(--border-color);
  font-family: 'Noto Sans KR', 'Malgun Gothic', -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--text-primary);
  box-shadow: var(--shadow-lg);
  line-height: 1.5;
}

/* 다크모드 토글 버튼 */
.dark-mode-toggle {
  position: absolute;
  top: 12px;
  right: 12px;
  padding: 8px 12px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  cursor: pointer;
  transition: all 0.2s;
  box-shadow: var(--shadow-sm);
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  z-index: 10;
}

.dark-mode-toggle:hover {
  transform: translate(0.5px, 0.5px);
  box-shadow: 1.5px 1.5px 0 rgba(0,0,0,0.15);
}

.dark-mode-toggle:active {
  transform: translate(2px, 2px);
  box-shadow: none;
}

.theme-icon {
  display: inline-block;
  font-size: 18px;
}

/* 헤더 */
.calculator-header {
  text-align: center;
  margin-bottom: 12px;
  padding-bottom: 10px;
  padding-top: 25px;
  border-bottom: 3px double var(--border-color);
}

.calculator-header h2 {
  margin: 0 0 6px 0;
  font-size: 28px;
  font-weight: 700;
  color: var(--title-color);
  text-shadow: var(--title-shadow);
  line-height: 1.2;
}

.subtitle {
  margin: 0;
  font-size: 15px;
  color: var(--text-light);
  line-height: 1.4;
}

/* 메인 컨테이너 */
.tool-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 12px;
}

/* 섹션 공통 */
.upload-section,
.rules-section {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 12px;
  box-shadow: var(--shadow-md);
}

/* 섹션 타이틀 */
.section-title {
  display: flex;
  align-items: center;
  gap: 6px;
  margin: 0 0 10px 0;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-color);
  font-size: 17px;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1.2;
}

.section-title svg {
  flex-shrink: 0;
}

/* 업로드 영역 */
.upload-area {
  border: 2px dashed var(--border-color);
  padding: 25px 20px;
  text-align: center;
  margin-bottom: 12px;
  transition: all 0.2s ease;
  background: var(--upload-area-bg);
  cursor: pointer;
}

.upload-area:hover {
  background: var(--upload-area-hover-bg);
  transform: translate(1px, 1px);
}

.upload-area.dragover {
  background: var(--upload-area-dragover-bg);
  border-color: var(--color-accent);
  transform: translate(0, 0);
}

.upload-icon {
  margin-bottom: 12px;
  color: var(--text-secondary);
}

.upload-title {
  font-size: 16px;
  font-weight: 600;
  margin: 0 0 5px 0;
  color: var(--text-primary);
}

.upload-desc {
  margin: 5px 0 12px;
  color: var(--text-light);
  font-size: 14px;
}

.upload-btn {
  display: inline-block;
  background: var(--color-accent);
  color: #fff;
  padding: 8px 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  border: 1.5px solid var(--border-color);
  box-shadow: var(--shadow-md);
  font-size: 14px;
}

.upload-btn:hover {
  transform: translate(1px, 1px);
  box-shadow: 3px 3px 0 rgba(0,0,0,0.15);
  background: linear-gradient(var(--btn-hover-overlay), var(--btn-hover-overlay)), var(--color-accent);
}

.upload-btn:active {
  transform: translate(4px, 4px);
  box-shadow: none;
}

.upload-format {
  margin-top: 12px;
  font-size: 13px;
  color: var(--text-light);
}

/* 파일 목록 */
.file-list-container {
  margin-bottom: 12px;
}

.file-count {
  display: inline-block;
  padding: 2px 8px;
  background: var(--bg-primary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  font-size: 12px;
  font-weight: 600;
  margin-left: 5px;
}

.file-list {
  max-height: 180px;
  overflow-y: auto;
  border: 1px solid var(--border-color);
  padding: 5px;
  background: var(--bg-primary);
}

.file-item {
  display: flex;
  align-items: center;
  padding: 6px 8px;
  border-bottom: 1px solid var(--border-color);
  transition: background 0.2s;
}

.file-item:last-child {
  border-bottom: none;
}

.file-item:hover {
  background: var(--bg-secondary);
}

.file-type-icon {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-right: 8px;
  flex-shrink: 0;
  border: 1px solid var(--border-color);
}

.file-name {
  flex-grow: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 13px;
  color: var(--text-primary);
}

.file-size {
  font-size: 12px;
  color: var(--text-secondary);
  margin-left: 8px;
  flex-shrink: 0;
  font-family: 'Courier New', monospace;
}

.file-remove {
  background: transparent;
  border: none;
  color: var(--color-danger);
  cursor: pointer;
  padding: 2px;
  margin-left: 5px;
  opacity: 0.7;
  transition: opacity 0.2s;
  flex-shrink: 0;
}

.file-remove:hover {
  opacity: 1;
}

/* 파일 통계 */
.file-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  background: var(--stats-bg);
  border: 1px solid var(--border-color);
  padding: 12px;
  margin-top: 12px;
}

.stats-chart-container {
  flex: 1;
  min-width: 150px;
  height: 140px;
}

.stats-info {
  flex: 1;
  min-width: 150px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 8px;
}

.stat-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.stat-label {
  font-weight: 500;
  color: var(--text-secondary);
  font-size: 13px;
}

.stat-value {
  font-weight: 600;
  color: var(--text-primary);
  font-family: 'Courier New', monospace;
  font-size: 14px;
}

/* 규칙 그룹 */
.rule-group {
  margin-bottom: 12px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-color);
}

.rule-group:last-child {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 0;
}

.rule-label {
  display: block;
  margin-bottom: 6px;
  font-weight: 600;
  color: var(--text-primary);
  font-size: 14px;
}

.rule-desc {
  font-size: 12px;
  color: var(--text-light);
  margin-top: 5px;
  margin-bottom: 0;
}

.rules-section input[type="text"],
.rules-section input[type="number"],
.rules-section select {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid var(--border-color);
  font-size: 14px;
  color: var(--text-primary);
  background: var(--bg-section);
  transition: all 0.2s;
  font-family: 'Noto Sans KR', 'Malgun Gothic', sans-serif;
}

.rules-section input[type="text"]:focus,
.rules-section input[type="number"]:focus,
.rules-section select:focus {
  outline: none;
  background: var(--input-focus-bg);
  border-color: var(--color-accent);
}

.rules-section select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23666' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  background-size: 14px;
  padding-right: 32px;
}

.input-with-select {
  display: flex;
  gap: 8px;
}

.input-with-select select {
  width: 45%;
  flex-shrink: 0;
}

.input-with-select input {
  flex: 1;
}

/* 토글 스위치 */
.toggle-switch {
  position: relative;
  width: 50px;
  height: 26px;
  display: inline-block;
}

.toggle-switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.toggle-slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  transition: 0.3s;
}

.toggle-slider:before {
  position: absolute;
  content: "";
  height: 18px;
  width: 18px;
  left: 3px;
  bottom: 3px;
  background: var(--text-secondary);
  border: 1px solid var(--border-color);
  transition: 0.3s;
}

.toggle-switch input:checked + .toggle-slider {
  background: var(--color-accent);
}

.toggle-switch input:checked + .toggle-slider:before {
  transform: translateX(24px);
  background: #fff;
}

/* 패턴 미리보기 */
.pattern-preview {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  padding: 10px;
  margin-top: 12px;
}

.preview-title {
  font-size: 13px;
  font-weight: 600;
  margin: 0 0 6px 0;
  color: var(--text-secondary);
}

.preview-pattern {
  font-family: 'Courier New', monospace;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-accent);
  margin: 0;
  word-break: break-all;
}

/* 미리보기 섹션 */
.preview-section {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 12px;
  margin-bottom: 12px;
  box-shadow: var(--shadow-md);
}

.preview-desc {
  font-size: 13px;
  color: var(--text-light);
  margin: 0 0 10px 0;
}

.preview-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}

.select-all-container {
  display: flex;
  align-items: center;
  gap: 6px;
}

.select-all-container input[type="checkbox"] {
  width: 16px;
  height: 16px;
  cursor: pointer;
}

.select-all-container label {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  cursor: pointer;
}

/* 미리보기 테이블 */
.preview-table-container {
  overflow-x: auto;
  border: 1px solid var(--border-color);
  background: var(--bg-section);
}

.preview-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

.preview-table thead {
  background: var(--bg-primary);
  border-bottom: 2px solid var(--border-color);
}

.preview-table th {
  padding: 8px;
  text-align: left;
  font-weight: 700;
  color: var(--text-primary);
  white-space: nowrap;
}

.preview-table td {
  padding: 8px;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-primary);
}

.preview-table tbody tr:last-child td {
  border-bottom: none;
}

.preview-table tbody tr:hover {
  background: var(--bg-primary);
}

.checkbox-col {
  width: 40px;
  text-align: center;
}

.icon-col {
  width: 60px;
}

.size-col {
  width: 80px;
  font-family: 'Courier New', monospace;
}

.warning-col {
  width: 80px;
  text-align: center;
}

.file-checkbox {
  width: 16px;
  height: 16px;
  cursor: pointer;
}

.original-name {
  color: var(--text-secondary);
  font-family: 'Courier New', monospace;
}

.new-name {
  color: var(--color-success);
  font-weight: 600;
  font-family: 'Courier New', monospace;
}

.warning-icon {
  color: var(--color-warning);
  font-size: 16px;
}

.error-icon {
  color: var(--color-danger);
  font-size: 16px;
}

/* 검증 요약 */
.validation-summary {
  display: none;
  margin-top: 10px;
  padding: 10px;
  background: var(--stats-bg);
  border: 1px solid var(--border-color);
}

.validation-summary.show {
  display: block;
}

.validation-title {
  font-weight: 600;
  color: var(--text-primary);
  margin: 0 0 8px 0;
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 14px;
}

.validation-list {
  margin: 0;
  padding-left: 20px;
  font-size: 13px;
}

.validation-list li {
  margin-bottom: 5px;
  color: var(--text-secondary);
}

.validation-list li:last-child {
  margin-bottom: 0;
}

.validation-warning {
  color: var(--color-warning);
}

.validation-error {
  color: var(--color-danger);
}

/* 동작 버튼 */
.action-buttons {
  display: flex;
  gap: 8px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}

.action-btn {
  padding: 10px 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  font-size: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-family: 'Noto Sans KR', 'Malgun Gothic', sans-serif;
  color: #fff;
}

.action-btn svg {
  flex-shrink: 0;
}

.preview-btn {
  background: var(--color-success);
  border: 1px solid var(--border-color);
  flex: 1;
  box-shadow: var(--shadow-md);
}

.preview-btn:hover {
  transform: translate(1px, 1px);
  box-shadow: 3px 3px 0 rgba(0,0,0,0.15);
  background: linear-gradient(var(--btn-hover-overlay), var(--btn-hover-overlay)), var(--color-success);
}

.preview-btn:active {
  transform: translate(4px, 4px);
  box-shadow: none;
}

.rename-btn {
  background: var(--color-accent);
  flex: 2;
  border: 1.5px solid var(--border-color);
  box-shadow: var(--shadow-md);
}

.rename-btn:hover {
  transform: translate(1px, 1px);
  box-shadow: 3px 3px 0 rgba(0,0,0,0.15);
  background: linear-gradient(var(--btn-hover-overlay), var(--btn-hover-overlay)), var(--color-accent);
}

.rename-btn:active {
  transform: translate(4px, 4px);
  box-shadow: none;
}

.reset-btn {
  background: var(--color-warning);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-md);
}

.reset-btn:hover {
  transform: translate(1px, 1px);
  box-shadow: 3px 3px 0 rgba(0,0,0,0.15);
  background: linear-gradient(var(--btn-hover-overlay), var(--btn-hover-overlay)), var(--color-warning);
}

.reset-btn:active {
  transform: translate(4px, 4px);
  box-shadow: none;
}

/* 팁 섹션 */
.tips-section {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 12px;
  margin-bottom: 12px;
  box-shadow: var(--shadow-md);
}

.tips-title {
  font-size: 16px;
  font-weight: 600;
  margin: 0 0 10px 0;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 6px;
}

.tips-content {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 10px;
}

.tip {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  padding: 10px;
  font-size: 13px;
  color: var(--text-secondary);
}

.tip strong {
  color: var(--text-primary);
  font-weight: 600;
}

/* 토스트 알림 */
.toast {
  position: fixed;
  bottom: 20px;
  right: 20px;
  background: var(--bg-secondary);
  border: 2px solid var(--border-color);
  padding: 12px 16px;
  box-shadow: var(--shadow-lg);
  z-index: 1000;
  display: none;
  min-width: 250px;
  max-width: 400px;
  font-size: 14px;
  color: var(--text-primary);
  animation: slideIn 0.3s ease;
}

.toast.show {
  display: block;
}

.toast.success {
  border-color: var(--color-success);
  border-left-width: 5px;
}

.toast.error {
  border-color: var(--color-danger);
  border-left-width: 5px;
}

.toast.warning {
  border-color: var(--color-warning);
  border-left-width: 5px;
}

@keyframes slideIn {
  from {
    transform: translateX(400px);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

/* 반응형 - 768px */
@media screen and (max-width: 768px) {
  .file-batch-renamer-container {
    margin: 8px 5px;
    width: calc(100% - 10px);
    padding: 10px;
  }
  
  .calculator-header {
    padding-top: 35px;
  }
  
  .calculator-header h2 {
    font-size: 22px;
  }
  
  .subtitle {
    font-size: 13px;
  }
  
  .tool-container {
    grid-template-columns: 1fr;
    gap: 10px;
  }
  
  .tips-content {
    grid-template-columns: 1fr;
  }
  
  .action-buttons {
    flex-direction: column;
  }
  
  .preview-btn,
  .rename-btn,
  .reset-btn {
    width: 100%;
  }
  
  .toast {
    right: 10px;
    left: 10px;
    max-width: none;
  }
}

/* 반응형 - 480px */
@media screen and (max-width: 480px) {
  .file-batch-renamer-container {
    padding: 8px;
    border-width: 1px;
  }
  
  .calculator-header h2 {
    font-size: 20px;
  }
  
  .section-title {
    font-size: 15px;
  }
  
  .upload-area {
    padding: 20px 15px;
  }
  
  .file-stats {
    flex-direction: column;
  }
  
  .stats-chart-container {
    height: 120px;
  }
  
  .preview-table {
    font-size: 12px;
  }
  
  .preview-table th,
  .preview-table td {
    padding: 6px;
  }
}