/* style.css - Thumbnail Studio 디자인 시스템 & 스타일 */

/* 1. 디자인 시스템 토큰 & 리셋 */
:root {
  --bg-app: #030712;        /* Gray 950 */
  --bg-sidebar: #0b0f19;    /* Dark Blue-Gray */
  --bg-card: rgba(17, 24, 39, 0.7); /* Slate 900 Glass */
  --bg-input: #1f2937;       /* Gray 800 */
  --bg-input-hover: #374151; /* Gray 700 */
  
  --border-color: rgba(255, 255, 255, 0.08);
  --border-color-active: rgba(99, 102, 241, 0.5); /* Indigo 500 half opacity */
  
  --text-main: #f3f4f6;     /* Gray 100 */
  --text-muted: #9ca3af;    /* Gray 400 */
  --text-dim: #6b7280;      /* Gray 500 */
  
  --primary: #6366f1;       /* Indigo 500 */
  --primary-hover: #4f46e5; /* Indigo 600 */
  --primary-glow: rgba(99, 102, 241, 0.3);
  
  --accent: #a855f7;        /* Violet 500 */
  --accent-hover: #9333ea;  /* Violet 600 */
  --accent-light: #c084fc;   /* Violet 400 */
  
  --success: #10b981;       /* Emerald 500 (Naver Green style) */
  --success-hover: #059669;
  
  --font-ui: 'Inter', 'Pretendard', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-logo: 'Outfit', var(--font-ui);
  
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -2px rgba(0, 0, 0, 0.1);
  --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.2);
  
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s ease;
  
  --sidebar-width: 380px;
  --actions-width: 320px;
}

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

body {
  background-color: var(--bg-app);
  color: var(--text-main);
  font-family: var(--font-ui);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow: hidden;
  height: 100vh;
}

/* 스크롤바 커스텀 */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.2);
}

/* 2. 레이아웃 구조 */
.app-container {
  display: flex;
  flex-direction: column;
  height: 100vh;
}

/* 헤더 영역 */
.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  padding: 0 24px;
  background-color: var(--bg-sidebar);
  border-bottom: 1px solid var(--border-color);
  z-index: 10;
}

.logo-area {
  display: flex;
  align-items: center;
  gap: 10px;
  user-select: none;
}

.logo-icon {
  filter: drop-shadow(0 0 6px var(--primary-glow));
}

.logo-area h1 {
  font-family: var(--font-logo);
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: #ffffff;
}

.logo-area h1 span {
  background: linear-gradient(135deg, #a5b4fc 0%, var(--accent-light) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* 종횡비 선택 컨트롤 */
.aspect-ratio-selector {
  display: flex;
  background-color: var(--bg-app);
  border: 1px solid var(--border-color);
  padding: 4px;
  border-radius: 30px;
  gap: 2px;
}

.ratio-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  background: none;
  border: none;
  color: var(--text-muted);
  font-family: var(--font-ui);
  font-size: 13px;
  font-weight: 500;
  padding: 6px 14px;
  border-radius: 20px;
  cursor: pointer;
  transition: var(--transition-fast);
}

.ratio-btn svg {
  transition: var(--transition-fast);
}

.ratio-btn:hover {
  color: #ffffff;
}

.ratio-btn.active {
  background-color: var(--primary);
  color: #ffffff;
  box-shadow: 0 2px 8px rgba(99, 102, 241, 0.4);
}

.header-actions {
  display: flex;
  gap: 12px;
}

/* 메인 워크스페이스 */
.app-workspace {
  display: grid;
  grid-template-columns: var(--sidebar-width) 1fr var(--actions-width);
  height: calc(100vh - 64px);
  overflow: hidden;
}

/* 3. 패널 스타일 (공통) */
.sidebar-panel {
  background-color: var(--bg-sidebar);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.actions-panel {
  background-color: var(--bg-sidebar);
  border-left: 1px solid var(--border-color);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  overflow-y: auto;
}

/* 4. 왼쪽 사이드바 탭 제어 */
.sidebar-tabs {
  display: flex;
  border-bottom: 1px solid var(--border-color);
  background-color: rgba(2, 6, 23, 0.4);
}

.tab-btn {
  flex: 1;
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--text-muted);
  font-family: var(--font-ui);
  font-size: 14px;
  font-weight: 600;
  padding: 16px 0;
  cursor: pointer;
  transition: var(--transition-fast);
  text-align: center;
}

.tab-btn:hover {
  color: #ffffff;
  background-color: rgba(255, 255, 255, 0.02);
}

.tab-btn.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
  background-color: rgba(99, 102, 241, 0.03);
}

.tab-contents {
  flex: 1;
  overflow-y: auto;
  padding: 20px;
}

.tab-content {
  display: none;
  animation: fadeIn var(--transition-normal);
}

.tab-content.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* 제목 및 서브 정보 */
.section-title {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 6px;
  color: #ffffff;
}

.section-desc {
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 20px;
  line-height: 1.4;
}

/* 5. 폼 인풋 및 조작 UI */
.control-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 18px;
}

.control-group-row {
  display: flex;
  align-items: center;
  margin-bottom: 12px;
}

.control-grid-2col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.control-grid-3col {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 10px;
}

label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
}

/* 인풋, 셀렉트박스 */
input[type="text"],
select,
textarea {
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  border-radius: 8px;
  padding: 10px 14px;
  font-family: var(--font-ui);
  font-size: 13px;
  outline: none;
  transition: var(--transition-fast);
  width: 100%;
}

input[type="text"]:focus,
select:focus,
textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
  background-color: var(--bg-input-hover);
}

textarea {
  resize: vertical;
  line-height: 1.4;
}

/* 레인지 슬라이더 커스텀 */
.range-wrapper {
  display: flex;
  align-items: center;
  gap: 10px;
}

input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  flex: 1;
  height: 6px;
  border-radius: 3px;
  background: var(--bg-input);
  outline: none;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--primary);
  cursor: pointer;
  box-shadow: 0 1px 3px rgba(0,0,0,0.4);
  transition: var(--transition-fast);
}

input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.2);
  background: #ffffff;
}

.range-val {
  font-size: 12px;
  font-family: monospace;
  color: var(--text-muted);
  min-width: 38px;
  text-align: right;
}

/* 컬러 피커 커스텀 */
.color-picker-wrapper {
  display: flex;
  align-items: center;
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 4px 8px;
  gap: 8px;
  height: 38px;
  width: 100%;
}

.color-picker-wrapper input[type="color"] {
  -webkit-appearance: none;
  border: none;
  width: 28px;
  height: 24px;
  border-radius: 4px;
  cursor: pointer;
  background: none;
}

.color-picker-wrapper input[type="color"]::-webkit-color-swatch-wrapper {
  padding: 0;
}

.color-picker-wrapper input[type="color"]::-webkit-color-swatch {
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 4px;
}

.color-picker-wrapper input[type="text"] {
  border: none;
  background: none;
  padding: 0;
  font-family: monospace;
  font-size: 12px;
  text-transform: uppercase;
}

/* 체크박스 커스텀 */
.checkbox-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-main);
  cursor: pointer;
  user-select: none;
}

.checkbox-label input[type="checkbox"] {
  width: 16px;
  height: 16px;
  border-radius: 4px;
  accent-color: var(--primary);
  cursor: pointer;
}

/* 정렬 셀렉터 */
.align-selector {
  display: flex;
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 3px;
  height: 38px;
  width: 100%;
}

.align-btn {
  flex: 1;
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  transition: var(--transition-fast);
}

.align-btn:hover {
  color: #ffffff;
  background-color: rgba(255,255,255,0.03);
}

.align-btn.active {
  background-color: var(--bg-app);
  color: var(--primary);
  box-shadow: var(--shadow-sm);
}

/* 레이어 셀렉터 (제목, 부제목, 태그) */
.layer-selector {
  display: flex;
  background-color: var(--bg-app);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 3px;
  margin-bottom: 18px;
}

.layer-btn {
  flex: 1;
  background: none;
  border: none;
  color: var(--text-muted);
  font-family: var(--font-ui);
  font-size: 12px;
  font-weight: 600;
  padding: 8px 0;
  border-radius: 6px;
  cursor: pointer;
  transition: var(--transition-fast);
}

.layer-btn:hover {
  color: #ffffff;
}

.layer-btn.active {
  background-color: var(--bg-input);
  color: #ffffff;
  box-shadow: var(--shadow-sm);
}

/* 콜랩서블 섹션 (그림자, 하이라이트 박스) */
.collapsible-section {
  border: 1px solid var(--border-color);
  border-radius: 10px;
  background-color: rgba(2, 6, 23, 0.2);
  padding: 12px 14px;
  margin-top: 15px;
}

.sub-section-title {
  font-size: 12px;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 12px;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.border-top {
  border-top: 1px solid var(--border-color);
}

/* 9-Grid Position Selector */
.grid-position-selector {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
  width: 106px;
  background-color: var(--bg-app);
  padding: 6px;
  border-radius: 8px;
  border: 1px solid var(--border-color);
}

.pos-grid-btn {
  width: 26px;
  height: 26px;
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  cursor: pointer;
  position: relative;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}

.pos-grid-btn::after {
  content: "";
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background-color: var(--text-dim);
  transition: all var(--transition-fast);
}

.pos-grid-btn:hover {
  background-color: var(--bg-input-hover);
  border-color: var(--primary);
}

.pos-grid-btn:hover::after {
  background-color: var(--text-main);
  transform: scale(1.2);
}

.pos-grid-btn.active {
  background-color: var(--primary);
  border-color: var(--primary);
  box-shadow: 0 0 8px var(--primary-glow);
}

.pos-grid-btn.active::after {
  background-color: #ffffff;
  transform: scale(1.3);
}

/* 6. 템플릿 프리셋 카드 그리드 */
.preset-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.preset-card {
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 12px;
  cursor: pointer;
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
  gap: 10px;
  position: relative;
  overflow: hidden;
}

.preset-card:hover {
  transform: translateY(-2px);
  border-color: var(--primary);
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.2);
}

.preset-card.active {
  border-color: var(--primary);
  background-color: rgba(99, 102, 241, 0.05);
  box-shadow: 0 0 0 2px var(--primary);
}

.preset-preview-mini {
  height: 70px;
  border-radius: 6px;
  background-size: cover;
  background-position: center;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  border: 1px solid rgba(255,255,255,0.05);
}

.preset-preview-text {
  font-size: 11px;
  font-weight: 700;
  color: #fff;
  text-align: center;
  max-width: 90%;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
  pointer-events: none;
}

.preset-card-name {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-main);
  text-align: center;
}

/* 7. 배경 서브 컨트롤 타입별 토글 */
.type-selector {
  display: flex;
  background-color: var(--bg-app);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 3px;
  margin-bottom: 18px;
}

.bg-type-btn {
  flex: 1;
  background: none;
  border: none;
  color: var(--text-muted);
  font-family: var(--font-ui);
  font-size: 12px;
  font-weight: 600;
  padding: 8px 0;
  border-radius: 6px;
  cursor: pointer;
  transition: var(--transition-fast);
}

.bg-type-btn:hover {
  color: #ffffff;
}

.bg-type-btn.active {
  background-color: var(--bg-input);
  color: #ffffff;
  box-shadow: var(--shadow-sm);
}

.bg-sub-controls {
  display: none;
}

.bg-sub-controls.active {
  display: block;
  animation: fadeIn var(--transition-fast);
}

/* 그라데이션 프리셋 갤러리 */
.gradient-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  margin-top: 8px;
}

.grad-swatch {
  height: 32px;
  border-radius: 6px;
  cursor: pointer;
  border: 1px solid rgba(255,255,255,0.15);
  transition: transform var(--transition-fast);
}

.grad-swatch:hover {
  transform: scale(1.15);
  box-shadow: var(--shadow-md);
  border-color: #ffffff;
}

/* 파일 업로드 존 */
.file-upload-zone {
  border: 2px dashed var(--border-color);
  border-radius: 10px;
  background-color: rgba(2, 6, 23, 0.2);
  padding: 20px 10px;
  text-align: center;
  position: relative;
  cursor: pointer;
  transition: var(--transition-fast);
}

.file-upload-zone:hover {
  border-color: var(--primary);
  background-color: rgba(99, 102, 241, 0.02);
}

.file-upload-zone input[type="file"] {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: pointer;
}

.upload-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  pointer-events: none;
}

.upload-inner svg {
  color: var(--text-muted);
  transition: var(--transition-fast);
}

.file-upload-zone:hover .upload-inner svg {
  color: var(--primary);
  transform: translateY(-2px);
}

.upload-inner span {
  font-size: 11px;
  color: var(--text-muted);
}

/* 8. 중앙 미리보기 영역 */
.preview-area {
  background-color: #111420; /* 칠판처럼 어둡고 묵직한 백그라운드 */
  background-image: radial-gradient(#1e2235 1px, transparent 1px);
  background-size: 20px 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 40px;
  position: relative;
  overflow: hidden;
}

.canvas-container {
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.6);
  border-radius: 4px;
  background-color: #000;
  max-width: 100%;
  max-height: 100%;
  transition: transform 0.1s ease;
}

#thumbnailCanvas {
  display: block;
  max-width: 100%;
  max-height: 70vh;
  object-fit: contain;
  border-radius: 4px;
}

/* 드래그 오버레이 */
.canvas-interaction-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  cursor: default;
  z-index: 5;
}

/* 하단 툴바 */
.preview-toolbar {
  position: absolute;
  bottom: 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: calc(100% - 80px);
  max-width: 800px;
  background: rgba(11, 15, 25, 0.85);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  padding: 10px 20px;
  border-radius: 30px;
  box-shadow: var(--shadow-lg);
  z-index: 6;
}

.zoom-controls {
  display: flex;
  align-items: center;
  gap: 8px;
}

.tool-btn {
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition-fast);
}

.tool-btn:hover {
  color: #ffffff;
  background-color: var(--bg-input-hover);
  border-color: var(--primary);
}

.tool-btn.text-btn {
  width: auto;
  border-radius: 14px;
  padding: 0 10px;
  font-family: var(--font-ui);
  font-size: 11px;
  font-weight: 600;
}

.zoom-value {
  font-size: 12px;
  font-family: monospace;
  font-weight: 600;
  color: var(--text-main);
  min-width: 42px;
  text-align: center;
}

.canvas-dims {
  font-size: 11px;
  color: var(--text-muted);
  font-weight: 500;
}

/* 9. 우측 다운로드 & 셔플 패널 */
.action-card {
  background: var(--bg-card);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 20px;
  box-shadow: var(--shadow-md);
}

.card-title {
  font-size: 15px;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 6px;
}

.card-desc {
  font-size: 11px;
  color: var(--text-muted);
  margin-bottom: 18px;
  line-height: 1.4;
}

/* 포맷 버튼 토글 */
.format-selector {
  display: flex;
  background-color: rgba(2, 6, 23, 0.4);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 3px;
}

.format-btn {
  flex: 1;
  background: none;
  border: none;
  color: var(--text-muted);
  font-family: var(--font-ui);
  font-size: 11px;
  font-weight: 700;
  padding: 8px 0;
  border-radius: 6px;
  cursor: pointer;
  transition: var(--transition-fast);
}

.format-btn:hover {
  color: #ffffff;
}

.format-btn.active {
  background-color: var(--bg-input);
  color: #ffffff;
  box-shadow: var(--shadow-sm);
}

/* 대형 다운로드 버튼 */
.download-btn-main {
  width: 100%;
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  border: none;
  color: #ffffff;
  font-family: var(--font-ui);
  font-size: 14px;
  font-weight: 700;
  padding: 14px;
  border-radius: 12px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
  transition: all var(--transition-normal);
  margin-top: 10px;
}

.download-btn-main:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(99, 102, 241, 0.6);
  filter: brightness(1.1);
}

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

.download-icon {
  animation: bounce 2s infinite;
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
  40% { transform: translateY(-3px); }
  60% { transform: translateY(-1.5px); }
}

/* 퀵 셔플 버튼 */
.shuffle-buttons {
  display: flex;
  gap: 8px;
}

.shuffle-btn {
  flex: 1;
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  font-family: var(--font-ui);
  font-size: 11px;
  font-weight: 600;
  padding: 10px;
  border-radius: 8px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  transition: var(--transition-fast);
}

.shuffle-btn:hover {
  border-color: var(--primary);
  background-color: var(--bg-input-hover);
}

/* 4색 추천 컬러 스와치 */
.color-palette-swatches {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  margin-top: 10px;
}

.palette-row {
  display: flex;
  height: 28px;
  border-radius: 6px;
  overflow: hidden;
  cursor: pointer;
  border: 1px solid rgba(255,255,255,0.05);
  transition: all var(--transition-fast);
}

.palette-row:hover {
  transform: translateX(4px);
  box-shadow: var(--shadow-sm);
  border-color: rgba(255,255,255,0.2);
}

.palette-color {
  flex: 1;
  height: 100%;
}

/* 안내 카드 */
.guide-card {
  border: 1px solid rgba(99, 102, 241, 0.15);
  border-radius: 12px;
  background-color: rgba(99, 102, 241, 0.03);
  padding: 15px;
}

.guide-title {
  font-size: 12px;
  font-weight: 700;
  color: var(--accent-light);
  margin-bottom: 8px;
}

.guide-card ul {
  list-style: none;
}

.guide-card li {
  font-size: 11px;
  color: var(--text-muted);
  line-height: 1.5;
  margin-bottom: 6px;
  position: relative;
  padding-left: 12px;
}

.guide-card li::before {
  content: "•";
  color: var(--primary);
  position: absolute;
  left: 0;
  font-weight: bold;
}

.guide-card li strong {
  color: #ffffff;
}

/* 퀵 액션 공통 */
.action-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--border-color);
  font-family: var(--font-ui);
  font-size: 13px;
  font-weight: 600;
  padding: 8px 16px;
  border-radius: 20px;
  cursor: pointer;
  transition: var(--transition-fast);
}

.secondary-btn {
  background-color: var(--bg-input);
  color: var(--text-main);
}

.secondary-btn:hover {
  background-color: var(--bg-input-hover);
  border-color: var(--primary);
}

/* 10. 반응형 미디어 쿼리 */
@media (max-width: 1200px) {
  .app-workspace {
    grid-template-columns: 350px 1fr;
  }
  .actions-panel {
    grid-column: span 2;
    flex-direction: row;
    height: auto;
    border-left: none;
    border-top: 1px solid var(--border-color);
    overflow-y: visible;
  }
  .actions-panel > div {
    flex: 1;
  }
}

@media (max-width: 768px) {
  body {
    overflow-y: auto;
    height: auto;
  }
  .app-workspace {
    grid-template-columns: 1fr;
    height: auto;
  }
  .sidebar-panel {
    border-right: none;
    border-bottom: 1px solid var(--border-color);
    height: 550px;
  }
  .preview-area {
    padding: 20px;
    height: 450px;
  }
  .preview-toolbar {
    width: calc(100% - 40px);
  }
  .actions-panel {
    grid-column: span 1;
    flex-direction: column;
  }
}