index.css

/* OKLCH 기반 전문 테마 시스템 */
:root {
  /* Light theme - OKLCH color space */
  --background: oklch(0.9842 0.0034 247.8575);
  --foreground: oklch(0.2795 0.0368 260.0310);
  --card: oklch(1.0000 0 0);
  --card-foreground: oklch(0.2795 0.0368 260.0310);
  --popover: oklch(1.0000 0 0);
  --popover-foreground: oklch(0.2795 0.0368 260.0310);
  --primary: oklch(0.5854 0.2041 277.1173);
  --primary-foreground: oklch(1.0000 0 0);
  --secondary: oklch(0.9276 0.0058 264.5313);
  --secondary-foreground: oklch(0.3729 0.0306 259.7328);
  --muted: oklch(0.9670 0.0029 264.5419);
  --muted-foreground: oklch(0.5510 0.0234 264.3637);
  --accent: oklch(0.9299 0.0334 272.7879);
  --accent-foreground: oklch(0.3729 0.0306 259.7328);
  --destructive: oklch(0.6368 0.2078 25.3313);
  --destructive-foreground: oklch(1.0000 0 0);
  --border: oklch(0.8717 0.0093 258.3382);
  --input: oklch(0.8717 0.0093 258.3382);
  --ring: oklch(0.5854 0.2041 277.1173);

  /* Semantic color mappings */
  --color-bg-primary: var(--background);
  --color-bg-secondary: var(--muted);
  --color-bg-tertiary: var(--secondary);
  --color-bg-elevated: var(--card);
  --color-bg-overlay: oklch(0 0 0 / 0.5);

  --color-text-primary: var(--foreground);
  --color-text-secondary: var(--muted-foreground);
  --color-text-tertiary: oklch(0.6510 0.0184 264.3637);
  --color-text-inverse: var(--primary-foreground);
  --color-text-placeholder: var(--muted-foreground);

  --color-border-primary: var(--border);
  --color-border-secondary: var(--input);
  --color-border-focus: var(--ring);

  --color-surface-hover: var(--accent);
  --color-surface-active: var(--secondary);

  /* Button colors */
  --color-button-primary: var(--primary);
  --color-button-primary-hover: oklch(0.5354 0.2241 277.1173);
  --color-button-secondary: var(--muted-foreground);
  --color-button-secondary-hover: oklch(0.4510 0.0334 264.3637);
  --color-button-danger: var(--destructive);
  --color-button-danger-hover: oklch(0.5868 0.2278 25.3313);
  --color-button-success: oklch(0.5569 0.1872 165.3313);
  --color-button-success-hover: oklch(0.5069 0.1972 165.3313);

  /* Shadows */
  --shadow-2xs: 0px 4px 8px -1px oklch(0 0 0 / 0.05);
  --shadow-xs: 0px 4px 8px -1px oklch(0 0 0 / 0.05);
  --shadow-sm: 0px 4px 8px -1px oklch(0 0 0 / 0.10), 0px 1px 2px -2px oklch(0 0 0 / 0.10);
  --shadow: 0px 4px 8px -1px oklch(0 0 0 / 0.10), 0px 1px 2px -2px oklch(0 0 0 / 0.10);
  --shadow-md: 0px 4px 8px -1px oklch(0 0 0 / 0.10), 0px 2px 4px -2px oklch(0 0 0 / 0.10);
  --shadow-lg: 0px 4px 8px -1px oklch(0 0 0 / 0.10), 0px 4px 6px -2px oklch(0 0 0 / 0.10);
  --shadow-xl: 0px 4px 8px -1px oklch(0 0 0 / 0.10), 0px 8px 10px -2px oklch(0 0 0 / 0.10);
  --shadow-2xl: 0px 4px 8px -1px oklch(0 0 0 / 0.25);

  --radius: 0.5rem;
}

/* Dark theme - OKLCH color space */
.dark {
  --background: oklch(0.2077 0.0398 265.7549);
  --foreground: oklch(0.9288 0.0126 255.5078);
  --card: oklch(0.2795 0.0368 260.0310);
  --card-foreground: oklch(0.9288 0.0126 255.5078);
  --popover: oklch(0.2795 0.0368 260.0310);
  --popover-foreground: oklch(0.9288 0.0126 255.5078);
  --primary: oklch(0.6801 0.1583 276.9349);
  --primary-foreground: oklch(0.2077 0.0398 265.7549);
  --secondary: oklch(0.3351 0.0331 260.9120);
  --secondary-foreground: oklch(0.8717 0.0093 258.3382);
  --muted: oklch(0.2795 0.0368 260.0310);
  --muted-foreground: oklch(0.7137 0.0192 261.3246);
  --accent: oklch(0.3729 0.0306 259.7328);
  --accent-foreground: oklch(0.8717 0.0093 258.3382);
  --destructive: oklch(0.6368 0.2078 25.3313);
  --destructive-foreground: oklch(0.2077 0.0398 265.7549);
  --border: oklch(0.4461 0.0263 256.8018);
  --input: oklch(0.4461 0.0263 256.8018);
  --ring: oklch(0.6801 0.1583 276.9349);

  /* Semantic color mappings for dark theme */
  --color-bg-primary: var(--background);
  --color-bg-secondary: var(--muted);
  --color-bg-tertiary: var(--secondary);
  --color-bg-elevated: var(--card);
  --color-bg-overlay: oklch(0 0 0 / 0.75);

  --color-text-primary: var(--foreground);
  --color-text-secondary: var(--muted-foreground);
  --color-text-tertiary: oklch(0.6137 0.0292 261.3246);
  --color-text-inverse: var(--primary-foreground);
  --color-text-placeholder: var(--muted-foreground);

  --color-border-primary: var(--border);
  --color-border-secondary: var(--input);
  --color-border-focus: var(--ring);

  --color-surface-hover: var(--accent);
  --color-surface-active: var(--secondary);

  /* Button colors for dark theme */
  --color-button-primary: var(--primary);
  --color-button-primary-hover: oklch(0.7301 0.1783 276.9349);
  --color-button-secondary: var(--muted-foreground);
  --color-button-secondary-hover: oklch(0.7637 0.0193 261.3246);
  --color-button-danger: var(--destructive);
  --color-button-danger-hover: oklch(0.5868 0.2278 25.3313);
  --color-button-success: oklch(0.5569 0.1872 165.3313);
  --color-button-success-hover: oklch(0.6069 0.1772 165.3313);
}

/* CSS 파일에 추가 */
.my-library-table {
  width: 100%;
  min-width: 1600px; /* Updated for ebook column */
  max-width: none;
  /* Smooth scrolling for better UX when virtualization kicks in */
  scroll-behavior: smooth;
}

/* Hide scrollbar for small datasets while maintaining functionality */
.my-library-table::-webkit-scrollbar {
  width: 8px;
}

.my-library-table::-webkit-scrollbar-track {
  background: var(--color-bg-secondary);
  border-radius: 4px;
}

.my-library-table::-webkit-scrollbar-thumb {
  background: var(--color-border-primary);
  border-radius: 4px;
}

.my-library-table::-webkit-scrollbar-thumb:hover {
  background: var(--color-text-secondary);
}

/* Line clamp utility for text truncation */
.line-clamp-2 {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* Animation for fade in */
.animate-fade-in {
  animation: fadeIn 0.3s ease-in-out;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Custom tag component styling */
.custom-tag {
  display: inline-flex;
  align-items: center;
  font-weight: 500;
  border-radius: 0.375rem;
  border-width: 1px;
  transition: all 0.2s ease-in-out;
  white-space: nowrap;
}

.custom-tag:hover {
  box-shadow: var(--shadow-sm);
}

.custom-tag.clickable {
  cursor: pointer;
}

/* 테마 기반 유틸리티 클래스 */
.bg-primary {
  background-color: var(--color-bg-primary);
}

.bg-secondary {
  background-color: var(--color-bg-secondary);
}

.bg-tertiary {
  background-color: var(--color-bg-tertiary);
}

.bg-elevated {
  background-color: var(--color-bg-elevated);
  box-shadow: var(--shadow-sm);
}

/* Shadow utility classes */
.shadow-sm {
  box-shadow: var(--shadow-sm);
}

.shadow {
  box-shadow: var(--shadow);
}

.shadow-md {
  box-shadow: var(--shadow-md);
}

.shadow-lg {
  box-shadow: var(--shadow-lg);
}

.shadow-xl {
  box-shadow: var(--shadow-xl);
}

.shadow-2xl {
  box-shadow: var(--shadow-2xl);
}

.text-primary {
  color: var(--color-text-primary);
}

.text-secondary {
  color: var(--color-text-secondary);
}

.text-tertiary {
  color: var(--color-text-tertiary);
}

.text-inverse {
  color: var(--color-text-inverse);
}

.border-primary {
  border-color: var(--color-border-primary);
}

.border-secondary {
  border-color: var(--color-border-secondary);
}

.border-focus {
  border-color: var(--color-border-focus);
}

.hover-surface:hover {
  background-color: var(--color-surface-hover);
}

.active-surface:active {
  background-color: var(--color-surface-active);
}

/* 공통 입력 요소 스타일 */
.input-base {
  background-color: var(--color-bg-elevated);
  border: 1px solid var(--color-border-primary);
  color: var(--color-text-primary);
  border-radius: 0.375rem;
  padding: 0.5rem 0.75rem;
  font-size: 0.875rem;
  transition: all 0.2s ease-in-out;
}

.input-base:focus {
  outline: none;
  border-color: var(--color-border-focus);
  box-shadow: 0 0 0 3px oklch(from var(--ring) l c h / 0.1);
}

.input-base::placeholder {
  color: var(--color-text-placeholder);
}

/* 버튼 기본 스타일 */
.btn-base {
  font-weight: 500;
  border-radius: 0.375rem;
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  transition: all 0.2s ease-in-out;
  border: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.btn-primary {
  background-color: var(--color-button-primary);
  color: var(--color-text-inverse);
}

.btn-primary:hover:not(:disabled) {
  background-color: var(--color-button-primary-hover);
}

.btn-secondary {
  background-color: var(--color-button-secondary);
  color: var(--color-text-inverse);
}

.btn-secondary:hover:not(:disabled) {
  background-color: var(--color-button-secondary-hover);
}

.btn-danger {
  background-color: var(--color-button-danger);
  color: var(--color-text-inverse);
}

.btn-danger:hover:not(:disabled) {
  background-color: var(--color-button-danger-hover);
}

.btn-success {
  background-color: var(--color-button-success);
  color: var(--color-text-inverse);
}

.btn-success:hover:not(:disabled) {
  background-color: var(--color-button-success-hover);
}

.btn-base:disabled {
  cursor: not-allowed;
}

/* Library stock button styles with status indicators */
.library-tag {
  background-color: var(--secondary);
  color: var(--secondary-foreground);
  border: 1px solid var(--border);
  transition: background-color 0.2s ease-in-out,
              transform 0.2s ease-in-out,
              box-shadow 0.2s ease-in-out;
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.25rem 0.5rem;
  border-radius: 0.375rem;
  font-size: 0.75rem;
  line-height: 1.25;
  text-decoration: none;
  white-space: nowrap;
  box-shadow: var(--shadow-2xs);
  will-change: transform;
}

.library-tag:hover {
  background-color: oklch(from var(--secondary) calc(l * 0.95) c h);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.library-tag:focus {
  outline: 2px solid var(--ring);
  outline-offset: 2px;
}

.library-tag:active {
  transform: translateY(0);
  box-shadow: var(--shadow-2xs);
}

.library-tag.status-available {
  /* 대출가능 - 초록색 동그라미 */
}

.library-tag.status-unavailable {
  /* 재고있지만 대출불가 - 빨간색 동그라미 */
}

.library-tag.status-none {
  color: var(--muted-foreground);
  opacity: 0.7;
  /* 책없음 - 회색 동그라미, 연한 텍스트 */
}

.library-tag.status-none:hover {
  background-color: var(--secondary);
  transform: none;
  box-shadow: var(--shadow-2xs);
  opacity: 0.7;
}

.status-indicator {
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  flex-shrink: 0;
  border: 1px solid oklch(from var(--background) calc(l * 0.9) c h);
}

.status-indicator.available {
  background-color: var(--color-button-success);
  border-color: oklch(from var(--color-button-success) calc(l * 0.8) c h);
  box-shadow: 0 0 0 1px oklch(from var(--color-button-success) l c h / 0.2);
}

.status-indicator.unavailable {
  background-color: var(--color-button-danger);
  border-color: oklch(from var(--color-button-danger) calc(l * 0.8) c h);
  box-shadow: 0 0 0 1px oklch(from var(--color-button-danger) l c h / 0.2);
}

.status-indicator.none {
  background-color: var(--muted-foreground);
  border-color: oklch(from var(--muted-foreground) calc(l * 0.8) c h);
}

/* Small variant for grid view */
.library-tag-sm {
  gap: 0.2rem;
  padding: 0.15rem 0.35rem;
  font-size: 0.65rem;
  line-height: 1.2;
}

.library-tag-sm .status-indicator {
  width: 0.35rem;
  height: 0.35rem;
}

/* Responsive adjustments for library tags */
@media (max-width: 640px) {
  .library-tag {
    gap: 0.25rem;
    padding: 0.2rem 0.4rem;
    font-size: 0.7rem;
  }

  .status-indicator {
    width: 0.4rem;
    height: 0.4rem;
  }
}

/* Theme button responsive styles */
.theme-button-group {
  width: 100%;
}

/* 모바일에서도 테마 버튼을 1줄로 유지 */

/* Reduce motion for accessibility */
@media (prefers-reduced-motion: reduce) {
  .library-tag {
    transition: none;
  }

  .library-tag:hover {
    transform: none;
  }

  .library-tag:active {
    transform: none;
  }
}

/* Unified tag styles using design system colors */
.tag-primary {
  background-color: var(--primary);
  color: var(--primary-foreground);
  border: 1px solid transparent;
  box-shadow: var(--shadow-sm);
  transition: all 0.2s ease-in-out;
}

.tag-primary:hover {
  background-color: oklch(from var(--primary) calc(l * 0.9) c h);
}

.tag-secondary {
  background-color: var(--secondary);
  color: var(--secondary-foreground);
  border: 1px solid transparent;
  transition: all 0.2s ease-in-out;
}

.tag-secondary:hover {
  background-color: oklch(from var(--secondary) calc(l * 0.9) c h);
}

.tag-tertiary {
  /* 
    1. 배경색과 글자색은 `.btn-secondary`의 변수를 참조하여 일관성 확보
  */
  background-color: var(--color-button-secondary);
  color: var(--color-text-inverse);

  /* 
    2. 다른 태그들과 동일하게 투명 테두리를 추가하여 레이아웃 깨짐 및 
       의도치 않은 테두리 발생 방지
  */
  border: 1px solid transparent;

  /* 
    3. 다른 태그들과 동일한 transition 효과 적용
  */
  transition: all 0.2s ease-in-out;
}

.tag-tertiary:hover {
  /* 
    4. hover 효과는 다른 태그들과 동일한 `oklch` 방식을 사용.
       이렇게 하면 `.btn-secondary`의 hover 변수와 색이 다르더라도
       시각적 효과의 '느낌'은 통일됩니다.
  */
  background-color: oklch(from var(--color-button-secondary) calc(l * 0.9) c h);

}

/* Item-level dropdown for book controls */
.item-dropdown-btn {
  background-color: var(--color-bg-tertiary);
  color: var(--color-text-primary);
  border-radius: 0.5rem;
  padding: 0.25rem 0.5rem; /* 정렬보다 작게 조정 */
  font-size: 0.75rem; /* 태그와 동일 */
  transition: background-color 0.2s ease-in-out,
              transform 0.2s ease-in-out;
}

.item-dropdown-btn:hover {
  background-color: var(--color-surface-hover);
}

.item-dropdown-btn:focus {
  outline: 2px solid var(--ring);
  outline-offset: 2px;
}
/*
 * 데모 모드 안내 띠 (components/DemoModeBanner.tsx)
 *
 * 띠의 색 정본은 Tailwind의 dark: variant가 아니라 여기다.
 * index.html에 tailwind.config = { darkMode: 'class' }가 있어 dark:도 앱 테마를 따르지만,
 * 이 규칙은 body의 .dark를 직접 보므로 Tailwind 설정·CDN 로드 여부와 무관하게 앱 테마를 따른다.
 * (tests/demo-library-ui.test.mjs의 [V-18]이 아래 hex 값을 그대로 단언한다.)
 *
 * 색은 blue-50/800/200(라이트), blue-950/200/800(다크).
 * 로그인 버튼과 같은 blue-600을 쓰면 클릭 가능한 CTA처럼 읽히므로 채도를 낮췄다.
 */
.demo-mode-banner {
  background-color: #eff6ff;
  color: #1e40af;
  border-bottom: 1px solid #bfdbfe;
}

.dark .demo-mode-banner {
  background-color: #172554;
  color: #bfdbfe;
  border-bottom-color: #1e40af;
}