@charset "UTF-8";
/* ==========================================================================
   Thai Educational E-Library - Main Application Stylesheet
   Designed for Academic & Instructional Media Systems (ภูเก็ตปัญญานุกูล E-Library)
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Google Fonts Import (Prompt & Sarabun)
   -------------------------------------------------------------------------- */
@import url('https://fonts.googleapis.com/css2?family=Prompt:ital,wght@0,300;0,400;0,500;0,600;0,700;1,400;1,600&family=Sarabun:ital,wght@0,300;0,400;0,500;0,600;0,700;1,400&display=swap');

/* --------------------------------------------------------------------------
   2. Design Tokens & CSS Custom Properties
   -------------------------------------------------------------------------- */
:root {
  /* Color Palette - Light Mode */
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-card: #ffffff;
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --text-muted: #94a3b8;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --accent-light: #eff6ff;
  --accent-subtle: #dbeafe;
  --border-color: #e2e8f0;
  --border-focus: #3b82f6;
  --card-border: #e2e8f0;

  /* Status & Semantic Colors */
  --color-success: #10b981;
  --color-success-bg: #ecfdf5;
  --color-warning: #f59e0b;
  --color-warning-bg: #fffbeb;
  --color-danger: #ef4444;
  --color-danger-bg: #fef2f2;
  --color-info: #0284c7;
  --color-info-bg: #f0f9ff;

  /* Badge Colors */
  --badge-bg: #e0f2fe;
  --badge-text: #0284c7;
  --badge-border: #bae6fd;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -2px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 12px 24px -4px rgba(0, 0, 0, 0.12), 0 4px 10px -2px rgba(0, 0, 0, 0.06);
  --shadow-card: 0 4px 14px 0 rgba(15, 23, 42, 0.06);
  --shadow-hover: 0 16px 28px -4px rgba(37, 99, 235, 0.15), 0 6px 12px -2px rgba(0, 0, 0, 0.08);

  /* Typography */
  --font-heading: 'Prompt', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-body: 'Sarabun', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

  /* Spacing & Radii */
  --radius-xs: 4px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Layout */
  --header-height: 72px;
  --container-max-width: 1240px;
}

/* Dark Theme Overrides */
[data-theme="dark"] {
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-card: #1e293b;
  --text-primary: #e2e8f0;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent: #38bdf8;
  --accent-hover: #0ea5e9;
  --accent-light: rgba(56, 189, 248, 0.12);
  --accent-subtle: rgba(56, 189, 248, 0.22);
  --border-color: #334155;
  --border-focus: #38bdf8;
  --card-border: #334155;

  --color-success-bg: rgba(16, 185, 129, 0.15);
  --color-warning-bg: rgba(245, 158, 11, 0.15);
  --color-danger-bg: rgba(239, 68, 68, 0.15);
  --color-info-bg: rgba(56, 189, 248, 0.15);

  --badge-bg: rgba(56, 189, 248, 0.16);
  --badge-text: #7dd3fc;
  --badge-border: rgba(56, 189, 248, 0.3);

  --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.4);
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -2px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 16px 32px -4px rgba(0, 0, 0, 0.6), 0 6px 14px -2px rgba(0, 0, 0, 0.4);
  --shadow-card: 0 4px 18px 0 rgba(0, 0, 0, 0.35);
  --shadow-hover: 0 16px 32px -4px rgba(56, 189, 248, 0.22), 0 6px 14px -2px rgba(0, 0, 0, 0.5);
}

/* --------------------------------------------------------------------------
   3. Global Reset & Base Typography
   -------------------------------------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

* {
  transition: background-color 0.3s, color 0.3s, border-color 0.3s;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.3;
  color: var(--text-primary);
}

p {
  margin-bottom: 0.75rem;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--accent-hover);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

/* Layout Utilities */
.app-container {
  width: 100%;
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 1rem;
}

.main-content {
  flex: 1;
  padding-bottom: 3rem;
}

/* --------------------------------------------------------------------------
   4. App Header (Sticky Top Bar with Backdrop Blur)
   -------------------------------------------------------------------------- */
.app-header {
  position: sticky;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background-color: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  z-index: 100;
  display: flex;
  align-items: center;
}

[data-theme="dark"] .app-header {
  background-color: rgba(30, 41, 59, 0.88);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  gap: 1rem;
}

.brand-area {
  display: flex;
  align-items: center;
  gap: 0.875rem;
  text-decoration: none;
  color: inherit;
  cursor: pointer;
}

.app-logo {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--accent) 0%, #06b6d4 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  font-size: 1.5rem;
  font-weight: 700;
  box-shadow: 0 4px 10px rgba(37, 99, 235, 0.3);
  flex-shrink: 0;
}

.title-group {
  display: flex;
  flex-direction: column;
}

.app-title {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.25;
}

.app-subtitle {
  font-size: 0.775rem;
  color: var(--text-secondary);
  line-height: 1.2;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.625rem;
}

.theme-toggle-btn {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-color);
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1.125rem;
  transition: all 0.2s ease;
}

.theme-toggle-btn:hover {
  border-color: var(--accent);
  background-color: var(--accent-light);
  transform: rotate(15deg);
}

/* --------------------------------------------------------------------------
   5. Hero Section
   -------------------------------------------------------------------------- */
.hero-section {
  position: relative;
  background: linear-gradient(135deg, rgba(37, 99, 255, 0.08) 0%, rgba(56, 189, 248, 0.12) 100%);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 2.25rem 1.5rem;
  margin: 1.5rem auto 1.5rem auto;
  text-align: center;
  overflow: hidden;
}

[data-theme="dark"] .hero-section {
  background: linear-gradient(135deg, rgba(30, 41, 59, 0.8) 0%, rgba(15, 23, 42, 0.9) 100%);
  border-color: var(--border-color);
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background-color: var(--badge-bg);
  color: var(--badge-text);
  font-size: 0.8125rem;
  font-weight: 600;
  font-family: var(--font-heading);
  padding: 0.3rem 0.875rem;
  border-radius: var(--radius-full);
  margin-bottom: 1rem;
  border: 1px solid var(--badge-border);
}

.hero-title {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  letter-spacing: -0.01em;
}

.hero-subtitle {
  font-size: 1rem;
  color: var(--text-secondary);
  max-width: 680px;
  margin: 0 auto 1.25rem auto;
}

/* Stats Bar */
.stats-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 2rem;
  flex-wrap: wrap;
  padding-top: 1rem;
  border-top: 1px solid var(--border-color);
}

.stat-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.stat-number {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--accent);
}

.stat-label {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* --------------------------------------------------------------------------
   6. Search & Filters Bar
   -------------------------------------------------------------------------- */
.controls-panel {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 2rem;
}

.search-bar {
  position: relative;
  width: 100%;
  max-width: 720px;
  margin: 0 auto;
}

.search-bar::before {
  content: '🔍';
  position: absolute;
  left: 1.15rem;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.1rem;
  opacity: 0.65;
  pointer-events: none;
  z-index: 2;
  line-height: 1;
}

.search-input {
  width: 100%;
  height: 52px;
  padding: 0 3rem 0 3.25rem;
  background-color: var(--bg-secondary);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-full);
  color: var(--text-primary);
  font-size: 1rem;
  box-shadow: var(--shadow-sm);
  transition: all 0.2s ease;
  -webkit-appearance: none;
  appearance: none;
}

.search-input::-webkit-search-decoration,
.search-input::-webkit-search-cancel-button,
.search-input::-webkit-search-results-button,
.search-input::-webkit-search-results-decoration {
  display: none;
  -webkit-appearance: none;
}

.search-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-light);
}

.search-clear-btn {
  position: absolute;
  right: 1rem;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.25rem;
  cursor: pointer;
  padding: 0.25rem;
  border-radius: 50%;
  display: none;
}

.search-clear-btn.visible {
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Category Filter Pills */
.filter-pills {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  overflow-x: auto;
  padding: 0.25rem 0.5rem 0.5rem 0.5rem;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.filter-pills::-webkit-scrollbar {
  display: none;
}

.filter-pill {
  white-space: nowrap;
  padding: 0.5rem 1.125rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-color);
  background-color: var(--bg-secondary);
  color: var(--text-secondary);
  font-family: var(--font-heading);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  user-select: none;
}

.filter-pill:hover {
  color: var(--accent);
  border-color: var(--accent);
  background-color: var(--accent-light);
}

.filter-pill.active {
  background-color: var(--accent);
  color: #ffffff;
  border-color: var(--accent);
  box-shadow: 0 4px 10px rgba(37, 99, 235, 0.25);
  font-weight: 600;
}

/* --------------------------------------------------------------------------
   7. Book Grid & Book Cards
   -------------------------------------------------------------------------- */
.book-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-top: 1rem;
}

.book-card {
  background-color: var(--bg-card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.book-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--border-focus);
}

/* Book Cover - A4 Aspect Ratio (1 / 1.414) */
.book-cover-wrap,
.book-cover {
  position: relative;
  aspect-ratio: 1 / 1.414;
  overflow: hidden;
  background-color: #cbd5e1;
  border-top-left-radius: var(--radius-lg);
  border-top-right-radius: var(--radius-lg);
  width: 100%;
}

[data-theme="dark"] .book-cover-wrap,
[data-theme="dark"] .book-cover {
  background-color: #334155;
}

.book-cover-wrap img,
.book-cover-wrap .book-cover-img,
.book-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.book-card:hover .book-cover-wrap img,
.book-card:hover .book-cover img {
  transform: scale(1.035);
}

/* Book Cover Highlights & Edge Spine */
.book-cover-wrap::after,
.book-cover::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  width: 14px;
  background: linear-gradient(to right, rgba(0, 0, 0, 0.18) 0%, rgba(255, 255, 255, 0.12) 35%, transparent 100%);
  pointer-events: none;
}

/* Book Badges & Row */
.book-badges-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.65rem;
  flex-wrap: wrap;
}

.book-badges-overlay {
  position: absolute;
  top: 0.75rem;
  left: 0.75rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.375rem;
  z-index: 2;
}

.book-badge {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.65rem;
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  line-height: 1.25;
  white-space: nowrap;
  background-color: var(--badge-bg);
  color: var(--badge-text);
  border: 1px solid var(--badge-border);
}

.book-badge.category-badge {
  background-color: #eff6ff;
  color: #1d4ed8;
  border: 1px solid #bfdbfe;
}

.book-badge.year-badge,
.book-badge.badge-year {
  background-color: #f8fafc;
  color: #475569;
  border: 1px solid #e2e8f0;
}

[data-theme="dark"] .book-badge.category-badge {
  background-color: #1e293b;
  color: #93c5fd;
  border-color: #2563eb;
}

[data-theme="dark"] .book-badge.year-badge,
[data-theme="dark"] .book-badge.badge-year {
  background-color: #1e293b;
  color: #cbd5e1;
  border-color: #475569;
}

/* Book Info & Body Section - ปรับระยะ Padding ให้สบายตา ไม่ชิดขอบ */
.book-card-body,
.book-info {
  padding: 1.25rem 1.25rem 0.75rem 1.25rem;
  display: flex;
  flex-direction: column;
  flex: 1;
  min-width: 0;
}

.book-title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.05rem;
  line-height: 1.45;
  color: var(--text-primary);
  margin: 0 0 0.45rem 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  word-break: break-word;
  overflow-wrap: break-word;
}

.book-author {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin: 0 0 0.5rem 0;
  display: flex;
  align-items: center;
  gap: 0.35rem;
  line-height: 1.4;
  word-break: break-word;
  overflow-wrap: break-word;
}

.book-author::before {
  content: '👤';
  font-size: 0.8rem;
}

.book-description,
.book-desc {
  font-size: 0.825rem;
  color: var(--text-secondary);
  line-height: 1.55;
  margin: 0 0 0.75rem 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  text-overflow: ellipsis;
  word-break: break-word;
  overflow-wrap: break-word;
}

/* Book Actions - จัดปุ่มให้เว้นระยะจากขอบการ์ดอย่างสวยงาม */
.book-actions {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  margin-top: auto;
  padding: 0.85rem 1.25rem 1.25rem 1.25rem;
  border-top: 1px dashed var(--border-color);
  flex-wrap: wrap;
}

.book-actions .btn {
  flex: 1 1 0;
  min-width: 65px;
  padding: 0.48rem 0.35rem;
  font-size: 0.8rem;
  text-align: center;
  justify-content: center;
  white-space: nowrap;
  border-radius: var(--radius-md);
}

.btn-outline {
  background-color: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

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

/* --------------------------------------------------------------------------
   8. Buttons & Controls
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.5625rem 1rem;
  border-radius: var(--radius-md);
  font-family: var(--font-heading);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.2s ease;
  user-select: none;
  text-decoration: none;
}

.btn:active {
  transform: scale(0.98);
}

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

.btn-primary:hover {
  background-color: var(--accent-hover);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.btn-secondary {
  background-color: var(--accent-light);
  color: var(--accent);
  border-color: var(--border-color);
}

.btn-secondary:hover {
  background-color: var(--accent-subtle);
  border-color: var(--accent);
}

.btn-icon {
  width: 38px;
  height: 38px;
  padding: 0;
  border-radius: var(--radius-md);
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  flex-shrink: 0;
}

.btn-icon:hover {
  color: var(--accent);
  border-color: var(--accent);
  background-color: var(--accent-light);
}

.btn-read-now {
  flex: 1;
}

/* --------------------------------------------------------------------------
   9. Modal Dialogs & Overlay
   -------------------------------------------------------------------------- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background-color: rgba(15, 23, 42, 0.7);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 1.75rem 1rem;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s ease, visibility 0.25s ease;
  overflow-y: auto;
  overscroll-behavior: contain;
}

.modal-overlay.open {
  opacity: 1;
  visibility: visible;
}

.modal-content {
  background-color: var(--bg-card);
  max-width: 400px;
  width: 100%;
  max-height: calc(100vh - 3.5rem);
  max-height: calc(100dvh - 3.5rem);
  overflow-y: auto;
  overscroll-behavior: contain;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border-color);
  padding: 1.75rem;
  position: relative;
  transform: scale(0.95);
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  text-align: center;
  margin: auto;
}

.modal-overlay.open .modal-content {
  transform: scale(1);
}

.modal-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
}

.modal-close:hover {
  background-color: var(--border-color);
  color: var(--text-primary);
}

.modal-title {
  font-size: 1.25rem;
  margin-bottom: 0.375rem;
  padding-right: 1.5rem;
}

.modal-subtitle {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: 1.25rem;
}

.qr-display-box {
  background: #ffffff;
  padding: 1rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  display: inline-flex;
  justify-content: center;
  align-items: center;
  margin-bottom: 1rem;
  box-shadow: var(--shadow-sm);
}

.qr-display-box canvas,
.qr-display-box img {
  display: block;
  max-width: 220px;
  height: auto;
}

.modal-actions {
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
  margin-top: 0.5rem;
}

/* --------------------------------------------------------------------------
   10. Toast Notification Bar
   -------------------------------------------------------------------------- */
.toast {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  padding: 0.875rem 1.75rem;
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border-color);
  z-index: 2000;
  opacity: 0;
  pointer-events: none;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-heading);
  font-size: 0.9375rem;
  font-weight: 500;
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.35s ease;
}

.toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
  pointer-events: auto;
}

/* --------------------------------------------------------------------------
   11. Skeleton Loading States & Empty State
   -------------------------------------------------------------------------- */
.loading-skeleton {
  animation: skeletonPulse 1.6s ease-in-out infinite;
  background: linear-gradient(90deg, var(--border-color) 25%, var(--accent-light) 50%, var(--border-color) 75%);
  background-size: 200% 100%;
}

@keyframes skeletonPulse {
  0% {
    background-position: 200% 0;
  }
  100% {
    background-position: -200% 0;
  }
}

.skeleton-card {
  background-color: var(--bg-card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  height: 480px;
  display: flex;
  flex-direction: column;
}

.skeleton-cover {
  aspect-ratio: 1 / 1.414;
  width: 100%;
}

.skeleton-info {
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  flex: 1;
}

.skeleton-line {
  height: 16px;
  border-radius: var(--radius-xs);
}

.skeleton-line.title {
  height: 22px;
  width: 85%;
}

.skeleton-line.sub {
  width: 55%;
}

/* Empty State */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 4.5rem 1.5rem;
  text-align: center;
  color: var(--text-secondary);
  grid-column: 1 / -1;
}

.empty-state-icon {
  font-size: 3.5rem;
  margin-bottom: 1rem;
  opacity: 0.7;
}

.empty-state-title {
  font-family: var(--font-heading);
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.empty-state-text {
  font-size: 0.9375rem;
  max-width: 420px;
  margin-bottom: 1.5rem;
}

/* --------------------------------------------------------------------------
   12. Responsive Breakpoints
   -------------------------------------------------------------------------- */
/* Small tablets & landscape phones (640px+) */
@media (min-width: 640px) {
  .hero-section {
    padding: 2.75rem 2rem;
  }

  .hero-title {
    font-size: 2.125rem;
  }

  .controls-panel {
    gap: 1.25rem;
  }

  .book-grid {
    grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
    gap: 1.75rem;
  }
}

/* Tablets (768px+) */
@media (min-width: 768px) {
  .app-container {
    padding: 0 1.5rem;
  }

  .app-title {
    font-size: 1.3rem;
  }

  .app-subtitle {
    font-size: 0.8125rem;
  }

  .hero-title {
    font-size: 2.375rem;
  }

  .book-grid {
    grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
  }
}

/* Desktop Screens (1024px+) */
@media (min-width: 1024px) {
  .app-container {
    padding: 0 2rem;
  }

  .hero-section {
    padding: 3.5rem 2.5rem;
    margin: 2rem auto;
  }

  .hero-title {
    font-size: 2.75rem;
  }

  .hero-subtitle {
    font-size: 1.125rem;
  }

  .book-grid {
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 2rem;
  }
}


/* ==========================================================================
   PIYO CUTE UX/UI THEME & 3D WOODEN BOOKSHELF EXTENSION
   Inspired by Piyo children's storybook app
   ========================================================================== */

/* Cozy Room Background & Sunny Window Effect */
.cozy-room-bg {
  background-color: var(--bg-primary);
  background-image: 
    radial-gradient(circle at 10% 20%, rgba(255, 237, 213, 0.45) 0%, transparent 40%),
    radial-gradient(circle at 90% 80%, rgba(254, 215, 170, 0.25) 0%, transparent 35%);
  background-attachment: fixed;
  min-height: 100vh;
}

[data-theme="dark"] .cozy-room-bg {
  background-color: #1c1917;
  background-image: 
    radial-gradient(circle at 10% 20%, rgba(68, 64, 60, 0.3) 0%, transparent 40%),
    radial-gradient(circle at 90% 80%, rgba(41, 37, 36, 0.4) 0%, transparent 35%);
}

.sunny-window-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 280px;
  height: 380px;
  pointer-events: none;
  z-index: 0;
  background: radial-gradient(ellipse at 0% 0%, rgba(254, 243, 199, 0.4) 0%, rgba(254, 215, 170, 0.15) 50%, transparent 80%);
}

[data-theme="dark"] .sunny-window-bg {
  background: radial-gradient(ellipse at 0% 0%, rgba(56, 189, 248, 0.1) 0%, transparent 70%);
}

/* Piyo Header (Frosted Cloudy White to Transparent Gradient) */
.app-header.piyo-header {
  position: sticky;
  top: 0;
  left: 0;
  right: 0;
  height: auto;
  min-height: 82px;
  background: linear-gradient(180deg, 
    rgba(255, 255, 255, 0.98) 0%, 
    rgba(255, 254, 250, 0.88) 45%, 
    rgba(255, 253, 249, 0.45) 75%, 
    rgba(255, 253, 249, 0) 100%
  );
  border-bottom: none !important;
  box-shadow: none !important;
  padding: 0.85rem 0 1.6rem 0;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 1) 0%, rgba(0, 0, 0, 1) 68%, rgba(0, 0, 0, 0) 100%);
  -webkit-mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 1) 0%, rgba(0, 0, 0, 1) 68%, rgba(0, 0, 0, 0) 100%);
  z-index: 100;
}

[data-theme="dark"] .app-header.piyo-header {
  background: linear-gradient(180deg, 
    rgba(28, 25, 23, 0.98) 0%, 
    rgba(28, 25, 23, 0.85) 45%, 
    rgba(28, 25, 23, 0.45) 75%, 
    rgba(28, 25, 23, 0) 100%
  );
  border-bottom: none !important;
}

.piyo-header .header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.header-left, .header-right {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

/* Mascot Avatar */
.mascot-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: #ffedd5;
  border: 2.5px solid #fed7aa;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  box-shadow: 0 2px 6px rgba(251, 146, 60, 0.15);
  cursor: pointer;
  transition: transform 0.2s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.mascot-avatar:hover {
  transform: scale(1.08) rotate(-4deg);
}

/* Category Selector Pill */
.category-selector-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: #ffffff;
  border: 1.5px solid #e7ded4;
  padding: 0.45rem 0.9rem;
  border-radius: 9999px;
  font-size: 0.875rem;
  font-weight: 500;
  color: #574c46;
  cursor: pointer;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.04);
  transition: all 0.2s ease;
}

[data-theme="dark"] .category-selector-pill {
  background: #292524;
  border-color: #44403c;
  color: #e7e5e4;
}

.category-selector-pill:hover {
  border-color: #f97316;
  background: #fff7ed;
  color: #ea580c;
  transform: translateY(-1px);
}

[data-theme="dark"] .category-selector-pill:hover {
  background: #3c342d;
  border-color: #f97316;
  color: #fdba74;
}

/* Center Bubbly Logo */
.piyo-logo {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-decoration: none;
  text-align: center;
}

.piyo-logo .logo-text {
  font-family: 'Prompt', 'Mitr', sans-serif;
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, #f97316 0%, #ea580c 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: 0 2px 8px rgba(249, 115, 22, 0.15);
  line-height: 1.15;
}

.piyo-logo .logo-tag {
  font-family: 'Sarabun', 'Prompt', sans-serif;
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0;
  color: #635044;
  margin-top: 3px;
  max-width: 480px;
  width: auto;
  text-align: center;
  line-height: 1.35;
  white-space: normal;
  word-break: break-word;
  overflow: visible;
  display: block;
}

[data-theme="dark"] .piyo-logo .logo-tag {
  color: #d6d3d1;
}

/* Ambient BGM Player Pill & Day/Night Mode Pill in Header */
.bgm-player-pill,
.theme-mode-pill,
.star-badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  background: #ffffff;
  border: 1.5px solid #fed7aa;
  padding: 0.4rem 0.95rem;
  border-radius: 9999px;
  font-family: 'Prompt', sans-serif;
  font-weight: 700;
  font-size: 0.875rem;
  color: #c2410c;
  box-shadow: 0 1px 4px rgba(251, 146, 60, 0.08);
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
  outline: none;
  user-select: none;
}

.theme-mode-pill:hover,
.bgm-player-pill:hover,
.star-badge-pill:hover {
  transform: translateY(-2px) scale(1.03);
  box-shadow: 0 4px 12px rgba(234, 88, 12, 0.15);
  border-color: #f97316;
}

.theme-mode-pill.is-dark {
  background: linear-gradient(135deg, #1e1b4b 0%, #312e81 100%);
  border-color: #6366f1;
  color: #e0e7ff;
  box-shadow: 0 2px 10px rgba(99, 102, 241, 0.25);
}

.bgm-player-pill.is-playing {
  background: linear-gradient(135deg, #fff7ed 0%, #ffedd5 100%);
  border-color: #ea580c;
  color: #ea580c;
  box-shadow: 0 2px 10px rgba(234, 88, 12, 0.2);
}

[data-theme="dark"] .bgm-player-pill,
[data-theme="dark"] .theme-mode-pill,
[data-theme="dark"] .star-badge-pill {
  background: #292524;
  border-color: #78350f;
  color: #fdba74;
}

[data-theme="dark"] .theme-mode-pill.is-dark {
  background: linear-gradient(135deg, #1e1b4b 0%, #312e81 100%);
  border-color: #818cf8;
  color: #c7d2fe;
}

[data-theme="dark"] .bgm-player-pill.is-playing {
  background: #431407;
  border-color: #ea580c;
  color: #ffedd5;
}

.bgm-icon {
  font-size: 1.05rem;
  line-height: 1;
}

.bgm-player-pill.is-playing .bgm-icon {
  animation: musicBounce 1.2s ease-in-out infinite alternate;
}

@keyframes musicBounce {
  0% { transform: scale(1) rotate(0deg); }
  100% { transform: scale(1.2) rotate(8deg); }
}

.bgm-title {
  font-size: 0.825rem;
  letter-spacing: -0.01em;
}

/* Dancing Sound Bars */
.bgm-bars {
  display: inline-flex;
  align-items: flex-end;
  gap: 2px;
  height: 12px;
}

.bgm-bars .bar {
  width: 2.5px;
  height: 4px;
  background-color: #ea580c;
  border-radius: 9999px;
  transition: height 0.2s ease;
}

[data-theme="dark"] .bgm-bars .bar {
  background-color: #fb923c;
}

.bgm-player-pill.is-playing .bgm-bars .bar:nth-child(1) {
  animation: soundWave 0.9s ease-in-out infinite alternate;
}
.bgm-player-pill.is-playing .bgm-bars .bar:nth-child(2) {
  animation: soundWave 0.7s ease-in-out 0.2s infinite alternate;
}
.bgm-player-pill.is-playing .bgm-bars .bar:nth-child(3) {
  animation: soundWave 1.1s ease-in-out 0.4s infinite alternate;
}

@keyframes soundWave {
  0% { height: 3px; }
  50% { height: 12px; }
  100% { height: 6px; }
}

/* Round Piyo Icon Button */
.btn-piyo-round {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: #ffffff;
  border: 1.5px solid #e7ded4;
  color: #6c5f5e;
  font-size: 1.15rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.04);
  transition: all 0.2s cubic-bezier(0.34, 1.56, 0.64, 1);
}

[data-theme="dark"] .btn-piyo-round {
  background: #292524;
  border-color: #44403c;
  color: #e7e5e4;
}

.btn-piyo-round:hover {
  transform: scale(1.08) rotate(6deg);
  border-color: #f97316;
  background: #fff7ed;
  color: #ea580c;
}

.btn-piyo-round.small {
  width: 36px;
  height: 36px;
  font-size: 1rem;
}

/* --------------------------------------------------------------------------
   3D Wooden Bookshelf Showcase (สไตล์ Piyo)
   -------------------------------------------------------------------------- */
.shelf-section {
  margin: 1.5rem 0 2.5rem;
}

.shelf-section-header {
  margin-bottom: 1.25rem;
}

.shelf-section-header.compact {
  margin-bottom: 0.75rem;
}

.shelf-title {
  font-family: 'Prompt', sans-serif;
  font-size: 1.35rem;
  font-weight: 700;
  color: #453b36;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0;
}

[data-theme="dark"] .shelf-title {
  color: #f5f5f4;
}

.shelf-subtitle {
  font-size: 0.875rem;
  color: #8c7b72;
  margin-top: 0.25rem;
}

.fire-badge, .star-badge-icon {
  font-size: 1.25rem;
  display: inline-block;
  animation: pulseFire 2s ease-in-out infinite;
}

@keyframes pulseFire {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.15); }
}

/* Wooden Shelf Structure */
.wooden-shelf-wrapper {
  position: relative;
  margin: 1rem 0 3rem;
  padding: 0 0.5rem;
}

.bookshelf-stage {
  display: flex;
  align-items: flex-end;
  gap: 1.75rem;
  overflow-x: auto;
  overflow-y: visible;
  padding: 1.5rem 1rem 0.25rem;
  scroll-behavior: smooth;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.bookshelf-stage::-webkit-scrollbar {
  display: none;
}

/* Realistic 3D Standing Book on Shelf */
.shelf-book-item {
  flex: 0 0 200px;
  width: 200px;
  display: flex;
  flex-direction: column;
  align-items: center;
  cursor: pointer;
  perspective: 1000px;
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
  text-decoration: none;
  color: inherit;
  position: relative;
}

.shelf-book-item:hover, .shelf-book-item.featured {
  transform: translateY(-12px) scale(1.03);
}

.shelf-book-card {
  width: 100%;
  aspect-ratio: 1 / 1.35;
  border-radius: 4px 18px 18px 4px;
  overflow: hidden;
  position: relative;
  box-shadow: 
    -4px 4px 12px rgba(0, 0, 0, 0.18),
    2px 8px 24px rgba(0, 0, 0, 0.12);
  background: #ffffff;
  display: flex;
  border: 1px solid rgba(0, 0, 0, 0.08);
}

/* Dark Spine Strip on Left Edge */
.shelf-book-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 18px;
  height: 100%;
  background: linear-gradient(90deg, 
    rgba(30, 41, 59, 0.85) 0%, 
    rgba(51, 65, 85, 0.65) 50%, 
    rgba(15, 23, 42, 0.9) 100%);
  z-index: 2;
  box-shadow: inset -1px 0 2px rgba(255, 255, 255, 0.2), 2px 0 4px rgba(0, 0, 0, 0.3);
}

/* Embossed Spine Stitch Lines */
.shelf-book-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 17px;
  width: 2px;
  height: 100%;
  background: rgba(0, 0, 0, 0.25);
  box-shadow: 1px 0 0 rgba(255, 255, 255, 0.15);
  z-index: 2;
}

.shelf-book-cover-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.shelf-book-title {
  margin-top: 0.75rem;
  font-family: 'Prompt', sans-serif;
  font-size: 0.95rem;
  font-weight: 600;
  text-align: center;
  color: #453b36;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 100%;
}

[data-theme="dark"] .shelf-book-title {
  color: #e7e5e4;
}

/* Wooden Beam Under the Books */
.wooden-shelf-beam {
  position: relative;
  width: 100%;
  margin-top: -4px;
}

.wood-top {
  height: 16px;
  background: linear-gradient(180deg, #e3af7a 0%, #caa06d 100%);
  border-radius: 4px 4px 0 0;
  box-shadow: inset 0 2px 3px rgba(255, 255, 255, 0.4), inset 0 -1px 2px rgba(0, 0, 0, 0.15);
}

[data-theme="dark"] .wood-top {
  background: linear-gradient(180deg, #785233 0%, #5e3d23 100%);
}

.wood-front {
  height: 22px;
  background: linear-gradient(180deg, #ab7d4d 0%, #875e35 100%);
  border-radius: 0 0 6px 6px;
  box-shadow: inset 0 1px 1px rgba(255, 255, 255, 0.15);
}

[data-theme="dark"] .wood-front {
  background: linear-gradient(180deg, #4d3119 0%, #352110 100%);
}

.wood-shadow {
  height: 14px;
  background: radial-gradient(ellipse at 50% 0%, rgba(0, 0, 0, 0.22) 0%, transparent 75%);
}

/* --------------------------------------------------------------------------
   Minimalist Cozy Book View Stat & Popular Sections
   -------------------------------------------------------------------------- */
.book-view-stat {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.2rem 0.6rem;
  font-family: var(--font-heading, 'Prompt', sans-serif);
  font-size: 0.72rem;
  font-weight: 500;
  border-radius: var(--radius-full, 9999px);
  line-height: 1.25;
  white-space: nowrap;
  background-color: #f5f5f4;
  color: #78716c;
  border: 1px solid #e7e5e4;
  transition: all 0.2s ease;
}

[data-theme="dark"] .book-view-stat {
  background-color: #292524;
  color: #a8a29e;
  border-color: #44403c;
}

.book-view-stat .view-icon {
  font-size: 0.8rem;
  line-height: 1;
}

.book-view-stat.highlight {
  background: linear-gradient(135deg, rgba(249, 115, 22, 0.1), rgba(234, 88, 12, 0.15));
  color: #c2410c;
  border-color: rgba(249, 115, 22, 0.3);
  font-weight: 600;
}

[data-theme="dark"] .book-view-stat.highlight {
  background: linear-gradient(135deg, rgba(249, 115, 22, 0.2), rgba(234, 88, 12, 0.25));
  color: #fb923c;
  border-color: rgba(249, 115, 22, 0.4);
}

/* Legacy fallback (hidden from covers) */
.book-view-badge {
  display: none !important;
}

.section-tag-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.15), rgba(217, 119, 6, 0.2));
  color: #b45309;
  border: 1px solid rgba(245, 158, 11, 0.3);
  font-size: 0.75rem;
  font-weight: 700;
  font-family: var(--font-heading, 'Prompt', sans-serif);
  padding: 0.2rem 0.65rem;
  border-radius: 9999px;
  margin-bottom: 0.35rem;
  width: fit-content;
}

[data-theme="dark"] .section-tag-pill {
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.25), rgba(217, 119, 6, 0.3));
  color: #fde68a;
  border-color: rgba(245, 158, 11, 0.45);
}

.popular-cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.5rem;
  margin-top: 1rem;
}

/* --------------------------------------------------------------------------
   Cozy Popular Book Rank Badge (In metadata row, perfectly aligned)
   -------------------------------------------------------------------------- */
.book-rank-stat {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.2rem 0.65rem;
  font-family: var(--font-heading, 'Prompt', sans-serif);
  font-size: 0.75rem;
  font-weight: 700;
  border-radius: var(--radius-full, 9999px);
  line-height: 1.25;
  white-space: nowrap;
  letter-spacing: 0.01em;
  transition: all 0.2s ease;
}

.book-rank-stat .rank-icon {
  font-size: 0.85rem;
  line-height: 1;
}

/* Rank 1: Golden Honey / Champagne */
.book-rank-stat.rank-1 {
  background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
  color: #92400e;
  border: 1.5px solid #f59e0b;
  box-shadow: 0 2px 6px rgba(245, 158, 11, 0.2);
}

/* Rank 2: Silver Slate */
.book-rank-stat.rank-2 {
  background: linear-gradient(135deg, #f1f5f9 0%, #e2e8f0 100%);
  color: #475569;
  border: 1.5px solid #94a3b8;
  box-shadow: 0 2px 6px rgba(148, 163, 184, 0.15);
}

/* Rank 3: Bronze Peach */
.book-rank-stat.rank-3 {
  background: linear-gradient(135deg, #ffedd5 0%, #fed7aa 100%);
  color: #9a3412;
  border: 1.5px solid #fb923c;
  box-shadow: 0 2px 6px rgba(251, 146, 60, 0.2);
}

/* Rank 4+: Soft Slate */
.book-rank-stat.rank-other {
  background: #f8fafc;
  color: #64748b;
  border: 1px solid #cbd5e1;
}

/* Dark Theme Overrides */
[data-theme="dark"] .book-rank-stat.rank-1 {
  background: linear-gradient(135deg, #78350f 0%, #92400e 100%);
  color: #fef08a;
  border-color: #f59e0b;
}

[data-theme="dark"] .book-rank-stat.rank-2 {
  background: linear-gradient(135deg, #334155 0%, #475569 100%);
  color: #e2e8f0;
  border-color: #64748b;
}

[data-theme="dark"] .book-rank-stat.rank-3 {
  background: linear-gradient(135deg, #7c2d12 0%, #9a3412 100%);
  color: #fed7aa;
  border-color: #ea580c;
}

[data-theme="dark"] .book-rank-stat.rank-other {
  background: #292524;
  color: #a8a29e;
  border-color: #44403c;
}

/* Card highlights for popular ranks */
.popular-card-item {
  position: relative;
  transition: transform 0.25s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.25s ease, border-color 0.25s ease;
}

.popular-card-item.rank-card-1 {
  border: 1.5px solid rgba(245, 158, 11, 0.45);
  box-shadow: 0 4px 16px -2px rgba(245, 158, 11, 0.12), 0 2px 6px rgba(0, 0, 0, 0.04);
}

.popular-card-item.rank-card-1:hover {
  border-color: #f59e0b;
  box-shadow: 0 12px 28px -4px rgba(245, 158, 11, 0.25);
}

.popular-card-item.rank-card-2 {
  border: 1.5px solid rgba(148, 163, 184, 0.5);
}

.popular-card-item.rank-card-3 {
  border: 1.5px solid rgba(251, 146, 60, 0.45);
}

/* Legacy floating badge (hidden to ensure clean covers) */
.popular-rank-badge {
  display: none !important;
}

.weekly-popular-section,
.all-time-popular-section {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px dashed rgba(226, 232, 240, 0.8);
}

[data-theme="dark"] .weekly-popular-section,
[data-theme="dark"] .all-time-popular-section {
  border-top-color: rgba(51, 65, 85, 0.6);
}

.all-time-controls {
  margin-top: 0.75rem;
  margin-bottom: 0.75rem;
}

/* --------------------------------------------------------------------------
   Floating Bottom Navigation Dock (Piyo Style)
   -------------------------------------------------------------------------- */
.bottom-dock-nav {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1.5px solid rgba(240, 230, 218, 0.9);
  padding: 0.4rem 0.75rem;
  border-radius: 9999px;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  box-shadow: 0 10px 30px -4px rgba(249, 115, 22, 0.18), 0 4px 12px rgba(0, 0, 0, 0.06);
  z-index: 100;
  transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

[data-theme="dark"] .bottom-dock-nav {
  background: rgba(38, 34, 32, 0.94);
  border-color: rgba(68, 64, 60, 0.8);
  box-shadow: 0 10px 30px -4px rgba(0, 0, 0, 0.4);
}

.dock-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.15rem;
  padding: 0.45rem 1.15rem;
  border-radius: 9999px;
  border: 1.5px solid transparent;
  outline: none !important;
  -webkit-tap-highlight-color: transparent !important;
  user-select: none;
  background: transparent;
  color: #786962;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.dock-item:focus,
.dock-item:focus-visible,
.dock-item:active {
  outline: none !important;
  box-shadow: none;
}

[data-theme="dark"] .dock-item {
  color: #a8a29e;
}

.dock-item .dock-icon {
  font-size: 1.25rem;
  transition: transform 0.2s ease;
}

.dock-item .dock-label {
  font-family: 'Prompt', sans-serif;
  font-size: 0.7rem;
  font-weight: 600;
}

.dock-item:hover {
  color: #ea580c;
}

.dock-item.active {
  background: #fff7ed;
  color: #ea580c;
  border-color: rgba(249, 115, 22, 0.28);
  box-shadow: 0 2px 10px rgba(249, 115, 22, 0.15);
  outline: none !important;
}

[data-theme="dark"] .dock-item.active {
  background: #443428;
  color: #fb923c;
  border-color: rgba(251, 146, 60, 0.35);
  outline: none !important;
}

.dock-item.active .dock-icon {
  transform: scale(1.15);
}

.dock-item.active-playing {
  background: #fff7ed;
  color: #ea580c;
  border-color: rgba(249, 115, 22, 0.38) !important;
  box-shadow: 0 4px 14px rgba(249, 115, 22, 0.2) !important;
  outline: none !important;
}

.dock-item.active-playing .dock-icon {
  animation: bounceNote 1.4s infinite ease-in-out;
}

@keyframes bounceNote {
  0%, 100% { transform: translateY(0) scale(1.1); }
  50% { transform: translateY(-3px) scale(1.22); }
}

[data-theme="dark"] .dock-item.active-playing {
  background: #443428;
  color: #fb923c;
  border-color: rgba(251, 146, 60, 0.45) !important;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.35) !important;
  outline: none !important;
}

/* Reader BGM active indicator */
#soundToggleInReader.active-playing,
.btn-piyo-round.active-playing {
  background: #ffedd5 !important;
  color: #ea580c !important;
  border-color: rgba(249, 115, 22, 0.5) !important;
  box-shadow: 0 0 12px rgba(249, 115, 22, 0.4) !important;
  animation: pulseMusicBtn 1.8s infinite ease-in-out;
}

[data-theme="dark"] #soundToggleInReader.active-playing,
[data-theme="dark"] .btn-piyo-round.active-playing {
  background: #443428 !important;
  color: #fb923c !important;
  border-color: rgba(251, 146, 60, 0.6) !important;
  box-shadow: 0 0 14px rgba(251, 146, 60, 0.3) !important;
}

#soundToggleInReader.active-playing #soundIcon,
.btn-piyo-round.active-playing #soundIcon {
  display: inline-block;
  animation: bounceNote 1.4s infinite ease-in-out;
}

@keyframes pulseMusicBtn {
  0%, 100% { box-shadow: 0 0 6px rgba(249, 115, 22, 0.3); }
  50% { box-shadow: 0 0 14px rgba(249, 115, 22, 0.65); }
}

/* --------------------------------------------------------------------------
   Settings Drawer (สไลด์จากขวาเหมือน Piyo Image 2)
   -------------------------------------------------------------------------- */
.settings-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.45);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 500;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.settings-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

.settings-drawer {
  position: fixed;
  top: 0;
  right: 0;
  width: 480px;
  max-width: 95vw;
  height: 100vh;
  height: 100dvh;
  background: #ffffff;
  border-top-left-radius: 32px;
  border-bottom-left-radius: 32px;
  box-shadow: -10px 0 40px rgba(0, 0, 0, 0.16);
  z-index: 550;
  transform: translateX(100%);
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

[data-theme="dark"] .settings-drawer {
  background: #24201e;
  color: #f5f5f4;
}

.settings-drawer.open {
  transform: translateX(0);
}

.settings-header {
  padding: 1.5rem 1.75rem 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
}

[data-theme="dark"] .settings-header {
  border-bottom-color: rgba(255, 255, 255, 0.08);
}

.settings-title {
  font-family: 'Prompt', sans-serif;
  font-size: 1.5rem;
  font-weight: 700;
  color: #292524;
  margin: 0;
}

[data-theme="dark"] .settings-title {
  color: #fafaf9;
}

.settings-body {
  padding: 1.5rem 1.75rem 3.5rem;
  overflow-y: auto;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
}

/* Cute Promo Banner in Settings (Fox Mascot Card from Image 2) */
.settings-banner-card {
  background: linear-gradient(135deg, #fff1f2 0%, #ffe4e6 50%, #fed7aa 100%);
  border-radius: 20px;
  padding: 1.25rem 1.35rem;
  display: flex;
  align-items: center;
  gap: 1.15rem;
  box-shadow: 0 4px 14px rgba(244, 63, 94, 0.08);
  position: relative;
  overflow: hidden;
  margin-bottom: 0.5rem;
}

[data-theme="dark"] .settings-banner-card {
  background: linear-gradient(135deg, #4c1d24 0%, #3e221d 100%);
}

.banner-mascot {
  font-size: 2.75rem;
  flex-shrink: 0;
  animation: bounceMascot 3s ease-in-out infinite;
}

@keyframes bounceMascot {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-5px); }
}

.banner-text {
  flex: 1;
}

.banner-time {
  font-size: 0.725rem;
  font-weight: 600;
  color: #e11d48;
  display: block;
}

[data-theme="dark"] .banner-time {
  color: #fda4af;
}

.banner-title {
  font-family: 'Prompt', sans-serif;
  font-size: 1rem;
  font-weight: 700;
  color: #881337;
  margin: 0.15rem 0 0.25rem;
}

[data-theme="dark"] .banner-title {
  color: #fff1f2;
}

.banner-desc {
  font-size: 0.75rem;
  color: #9f1239;
  margin: 0;
  line-height: 1.35;
}

[data-theme="dark"] .banner-desc {
  color: #fecdd3;
}

.banner-action-btn {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: #fb7185;
  color: #ffffff;
  border: none;
  font-size: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  flex-shrink: 0;
  transition: transform 0.2s cubic-bezier(0.34, 1.56, 0.64, 1);
  box-shadow: 0 4px 10px rgba(251, 113, 133, 0.35);
}

.banner-action-btn:hover {
  transform: scale(1.1);
  background: #f43f5e;
}

/* Setting Section */
.settings-section {
  display: flex;
  flex-direction: column;
  gap: 1.15rem;
  margin-top: 0.5rem;
  margin-bottom: 1.5rem;
}

.section-title {
  font-family: 'Prompt', sans-serif;
  font-size: 0.9rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #8c7b72;
  margin: 0.75rem 0 0.35rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

[data-theme="dark"] .section-title {
  color: #a8a29e;
}

/* Setting Item Row */
.setting-item-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 0.95rem;
  border-radius: 14px;
  background: #faf7f2;
  border: 1px solid #f2ece2;
  transition: all 0.2s ease;
}

[data-theme="dark"] .setting-item-row {
  background: #2a2523;
  border-color: #3e3834;
}

.setting-item-row.clickable {
  cursor: pointer;
}

.setting-item-row.clickable:hover {
  background: #f5eee3;
  border-color: #e6dac9;
}

[data-theme="dark"] .setting-item-row.clickable:hover {
  background: #36302d;
  border-color: #524a45;
}

/* Vertical Stacking for Dropdown Select Rows (ป้องกันข้อความหักบรรทัดไม่สวย) */
.setting-item-row.setting-select-row {
  flex-direction: column;
  align-items: stretch;
  gap: 0.65rem;
  padding: 0.85rem 0.95rem;
}

.setting-item-row.setting-select-row .setting-item-info {
  width: 100%;
}

.setting-item-row.setting-select-row .piyo-select {
  width: 100%;
}

.setting-item-info {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  min-width: 0;
  flex: 1;
}

.setting-item-info .item-name {
  font-family: 'Prompt', sans-serif;
  font-weight: 600;
  font-size: 0.95rem;
  color: #332d29;
  line-height: 1.4;
  word-break: break-word;
}

[data-theme="dark"] .setting-item-info .item-name {
  color: #f5f5f4;
}

.setting-item-info .item-desc {
  font-size: 0.775rem;
  color: #8c7b72;
  line-height: 1.45;
}

.chevron-arrow {
  font-size: 1.25rem;
  color: #a8988f;
}

.item-value-badge {
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.25rem 0.65rem;
  background: #f5ede2;
  color: #786358;
  border-radius: 9999px;
}

[data-theme="dark"] .item-value-badge {
  background: #3e3834;
  color: #d6d3d1;
}

/* iOS-Style Toggle Switch */
.switch-toggle {
  position: relative;
  display: inline-block;
  width: 52px;
  height: 30px;
  flex-shrink: 0;
}

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

.slider {
  position: absolute;
  cursor: pointer;
  inset: 0;
  background-color: #d6cec5;
  transition: .3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

[data-theme="dark"] .slider {
  background-color: #57534e;
}

.slider:before {
  position: absolute;
  content: "";
  height: 22px;
  width: 22px;
  left: 4px;
  bottom: 4px;
  background-color: white;
  transition: .3s cubic-bezier(0.34, 1.56, 0.64, 1);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

input:checked + .slider {
  background-color: #ea580c;
}

input:checked + .slider:before {
  transform: translateX(22px);
}

.slider.round {
  border-radius: 34px;
}

.slider.round:before {
  border-radius: 50%;
}

/* Piyo Inputs & Dropdowns */
.piyo-select {
  padding: 0.75rem 1.15rem;
  border-radius: 14px;
  border: 1.5px solid #ded5cb;
  background: #ffffff;
  font-family: 'Prompt', sans-serif;
  font-size: 0.925rem;
  font-weight: 500;
  color: #453b36;
  outline: none;
  cursor: pointer;
  transition: all 0.2s ease;
  line-height: 1.5;
  box-sizing: border-box;
}

.piyo-select option {
  padding: 0.65rem 1rem;
  font-family: 'Prompt', sans-serif;
  font-size: 0.925rem;
  background: #ffffff;
  color: #453b36;
}

[data-theme="dark"] .piyo-select {
  background: #2e2a28;
  border-color: #57534e;
  color: #f5f5f4;
}

[data-theme="dark"] .piyo-select option {
  background: #2e2a28;
  color: #f5f5f4;
}

.piyo-select:focus {
  border-color: #f97316;
  box-shadow: 0 0 0 3px rgba(249, 115, 22, 0.15);
}

.setting-box {
  background: #faf5ee;
  border: 1.5px solid #ebe1d5;
  border-radius: 18px;
  padding: 1.15rem 1.35rem;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  margin-bottom: 0.35rem;
}

[data-theme="dark"] .setting-box {
  background: #2c2725;
  border-color: #44403c;
}

.setting-input-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: 'Prompt', sans-serif;
  font-size: 0.875rem;
  font-weight: 600;
  color: #453b36;
  margin-bottom: 0.15rem;
}

[data-theme="dark"] .setting-input-label {
  color: #e7e5e4;
}

.label-badge {
  font-size: 0.725rem;
  font-weight: 600;
  color: #ea580c;
  background: #fff7ed;
  padding: 0.2rem 0.55rem;
  border-radius: 6px;
  border: 1px solid #ffedd5;
  white-space: nowrap;
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
}

[data-theme="dark"] .label-badge {
  background: #443428;
  color: #fdba74;
}

.master-folder-callout {
  margin-top: 0.5rem;
  background: #f0fdf4;
  border: 1px solid #bbf7d0;
  border-radius: 10px;
  padding: 0.65rem 0.85rem;
}

[data-theme="dark"] .master-folder-callout {
  background: rgba(22, 101, 52, 0.2);
  border-color: rgba(34, 197, 94, 0.35);
}

.callout-badge-row {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-family: 'Prompt', sans-serif;
  font-size: 0.825rem;
  font-weight: 600;
  color: #15803d;
  margin-bottom: 0.25rem;
}

[data-theme="dark"] .callout-badge-row {
  color: #4ade80;
}

.callout-text {
  font-size: 0.8rem;
  line-height: 1.5;
  color: #166534;
  margin: 0;
}

[data-theme="dark"] .callout-text {
  color: #86efac;
}

.input-with-action {
  display: flex;
  gap: 0.5rem;
}

.piyo-text-input {
  flex: 1;
  padding: 0.5rem 0.75rem;
  border-radius: 10px;
  border: 1.5px solid #ded5cb;
  background: #ffffff;
  font-size: 0.8rem;
  color: #332d29;
  outline: none;
}

[data-theme="dark"] .piyo-text-input {
  background: #1f1b19;
  border-color: #57534e;
  color: #f5f5f4;
}

.piyo-text-input:focus {
  border-color: #f97316;
}

.setting-input-help {
  font-size: 0.725rem;
  color: #8c7b72;
  margin: 0;
  line-height: 1.35;
}

.settings-actions-group {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.btn-block {
  width: 100%;
  justify-content: center;
  padding: 0.65rem;
  border-radius: 12px;
  font-size: 0.875rem;
}

/* Reader Piyo Updates */
.piyo-reader-header {
  border-bottom: 2px solid rgba(0, 0, 0, 0.06);
}

.piyo-pill-btn {
  border-radius: 9999px;
  padding: 0.4rem 0.9rem;
  font-size: 0.85rem;
}

.piyo-back,
.piyo-toc-btn {
  border-radius: 9999px;
  padding: 0.4rem 0.9rem;
}

.piyo-turn {
  background: rgba(255, 255, 255, 0.75);
  border-radius: 50%;
  width: 48px;
  height: 48px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  border: 1px solid rgba(0, 0, 0, 0.05);
  font-size: 1.5rem;
}

.piyo-turn:hover {
  background: #ffffff;
  color: #ea580c;
  transform: translateY(-50%) scale(1.1);
}


/* ==========================================================================
   PANDA AVATAR & ADMIN AUTHENTICATION STYLES
   ========================================================================== */

/* Panda Avatar with Crown Badge */
.panda-avatar {
  position: relative;
  background: #ffffff;
  border: 2.5px solid #d6cec5;
}

[data-theme="dark"] .panda-avatar {
  background: #292524;
  border-color: #57534e;
}

.panda-avatar.is-admin {
  border-color: #f59e0b;
  box-shadow: 0 0 12px rgba(245, 158, 11, 0.4);
}

.admin-crown-badge {
  position: absolute;
  top: -8px;
  right: -6px;
  font-size: 1rem;
  line-height: 1;
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.25));
  animation: crownBounce 2s ease-in-out infinite;
}

@keyframes crownBounce {
  0%, 100% { transform: translateY(0) rotate(5deg); }
  50% { transform: translateY(-3px) rotate(-5deg); }
}

/* Settings Tabs Navigation */
.settings-tabs-nav {
  display: flex;
  background: #f5ede2;
  padding: 0.35rem;
  margin: 0.5rem 1.75rem 0;
  border-radius: 9999px;
  gap: 0.35rem;
}

[data-theme="dark"] .settings-tabs-nav {
  background: #2e2a28;
}

.settings-tab-btn {
  flex: 1;
  padding: 0.55rem 0.75rem;
  border-radius: 9999px;
  border: none;
  background: transparent;
  font-family: 'Prompt', sans-serif;
  font-size: 0.85rem;
  font-weight: 600;
  color: #786962;
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
  display: flex;
  align-items: center;
  justify-content: center;
}

[data-theme="dark"] .settings-tab-btn {
  color: #a8a29e;
}

.settings-tab-btn.active {
  background: #ffffff;
  color: #ea580c;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

[data-theme="dark"] .settings-tab-btn.active {
  background: #443c37;
  color: #fb923c;
}

/* Admin Locked View Card */
.admin-locked-card {
  background: #faf5ee;
  border: 2px dashed #ded4c7;
  border-radius: 20px;
  padding: 2.25rem 1.5rem;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
}

[data-theme="dark"] .admin-locked-card {
  background: #292523;
  border-color: #44403c;
}

.locked-icon {
  font-size: 3rem;
  margin-bottom: 0.25rem;
}

.locked-title {
  font-family: 'Prompt', sans-serif;
  font-size: 1.15rem;
  font-weight: 700;
  color: #332d29;
  margin: 0;
}

[data-theme="dark"] .locked-title {
  color: #fafaf9;
}

.locked-desc {
  font-size: 0.825rem;
  color: #786a63;
  margin: 0 0 0.5rem;
  line-height: 1.45;
  max-width: 320px;
}

[data-theme="dark"] .locked-desc {
  color: #a8a29e;
}

/* Admin Status Banner (Unlocked) */
.admin-status-banner {
  background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
  border: 1.5px solid #fcd34d;
  border-radius: 18px;
  padding: 1.1rem 1.35rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.75rem;
  box-shadow: 0 4px 12px rgba(245, 158, 11, 0.12);
}

[data-theme="dark"] .admin-status-banner {
  background: linear-gradient(135deg, #451a03 0%, #78350f 100%);
  border-color: #b45309;
}

.admin-badge-icon {
  font-size: 2rem;
  flex-shrink: 0;
}

.admin-status-info {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  min-width: 0;
}

.admin-status-label {
  font-size: 0.725rem;
  color: #92400e;
  font-weight: 600;
  letter-spacing: 0.02em;
}

[data-theme="dark"] .admin-status-label {
  color: #fde68a;
}

.admin-status-name {
  font-family: 'Prompt', sans-serif;
  font-size: 1rem;
  font-weight: 700;
  color: #78350f;
  white-space: nowrap;
}

[data-theme="dark"] .admin-status-name {
  color: #ffffff;
}

.btn-logout-small {
  padding: 0.45rem 1rem;
  border-radius: 9999px;
  border: 1.5px solid #d97706;
  background: #ffffff;
  color: #b45309;
  font-family: 'Prompt', sans-serif;
  font-size: 0.825rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  flex-shrink: 0;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

.btn-logout-small:hover {
  background: #b45309;
  color: #ffffff;
  transform: scale(1.03);
}

/* Admin Login Modal */
.admin-login-card {
  max-width: 380px;
  text-align: center;
}

.admin-panda-mascot {
  font-size: 3.5rem;
  margin-bottom: 0.5rem;
  animation: pandaWiggle 2.5s ease-in-out infinite;
}

@keyframes pandaWiggle {
  0%, 100% { transform: rotate(0); }
  25% { transform: rotate(8deg); }
  75% { transform: rotate(-8deg); }
}

.admin-login-form {
  margin-top: 1.25rem;
  text-align: left;
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-label {
  display: block;
  font-size: 0.825rem;
  font-weight: 600;
  color: #453b36;
  margin-bottom: 0.4rem;
}

[data-theme="dark"] .form-label {
  color: #e7e5e4;
}

.piyo-text-input.full-width {
  width: 100%;
  padding: 0.65rem 0.85rem;
  font-size: 0.95rem;
  box-sizing: border-box;
}

.login-error-msg {
  color: #dc2626;
  font-size: 0.775rem;
  font-weight: 600;
  margin-top: 0.4rem;
}

.modal-actions.column {
  flex-direction: column;
  gap: 0.75rem;
}

.admin-hint-text {
  font-size: 0.75rem;
  color: #8c7b72;
  margin: 0;
  text-align: center;
}

.admin-hint-text code {
  background: #f5ede2;
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  font-family: monospace;
  font-weight: bold;
  color: #ea580c;
}

[data-theme="dark"] .admin-hint-text code {
  background: #3e3834;
  color: #fdba74;
}

/* ==========================================================================
   DRIVE IMPORT COMPONENT STYLES
   ========================================================================== */
.section-subtitle {
  font-size: 0.825rem;
  color: #786962;
  margin: 0.15rem 0 0.85rem;
  line-height: 1.5;
}

[data-theme="dark"] .section-subtitle {
  color: #a8a29e;
}

.setting-grid-2col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

@media (max-width: 480px) {
  .setting-grid-2col {
    grid-template-columns: 1fr;
  }
}

.piyo-textarea {
  resize: vertical;
  min-height: 56px;
  font-family: inherit;
  line-height: 1.4;
}

.label-badge.required {
  background: #fee2e2;
  color: #b91c1c;
}

[data-theme="dark"] .label-badge.required {
  background: #7f1d1d;
  color: #fca5a5;
}

.import-status-box {
  margin-top: 0.85rem;
  padding: 0.85rem 1rem;
  border-radius: 14px;
  font-size: 0.85rem;
  line-height: 1.45;
  display: flex;
  align-items: center;
  gap: 0.65rem;
  animation: fadeIn 0.25s ease-out;
}

.import-status-box.loading {
  background: #eff6ff;
  color: #1d4ed8;
  border: 1.5px solid #bfdbfe;
}

[data-theme="dark"] .import-status-box.loading {
  background: #172554;
  color: #93c5fd;
  border-color: #1e40af;
}

.import-status-box.success {
  background: #f0fdf4;
  color: #15803d;
  border: 1.5px solid #bbf7d0;
}

[data-theme="dark"] .import-status-box.success {
  background: #052e16;
  color: #86efac;
  border-color: #166534;
}

.import-status-box.error {
  background: #fef2f2;
  color: #b91c1c;
  border: 1.5px solid #fecaca;
}

[data-theme="dark"] .import-status-box.error {
  background: #450a0a;
  color: #fca5a5;
  border-color: #991b1b;
}

.btn-lg {
  padding: 0.85rem 1.25rem;
  font-size: 0.95rem;
  font-weight: 700;
  border-radius: 14px;
}

/* ==========================================================================
   EDIT BOOK MODAL & ADMIN EDIT BUTTON STYLES
   ========================================================================== */
.edit-book-card {
  max-width: 780px;
  width: 95%;
  max-height: calc(100vh - 3.5rem);
  max-height: calc(100dvh - 3.5rem);
  overflow-y: auto;
  overscroll-behavior: contain;
  text-align: left;
  padding: 2.25rem 2.5rem;
  border-radius: 24px;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25), 0 0 0 1px var(--border-color);
}

.edit-book-card::-webkit-scrollbar {
  width: 7px;
}

.edit-book-card::-webkit-scrollbar-track {
  background: transparent;
}

.edit-book-card::-webkit-scrollbar-thumb {
  background: rgba(156, 163, 175, 0.45);
  border-radius: 9999px;
}

.edit-book-card::-webkit-scrollbar-thumb:hover {
  background: rgba(107, 114, 128, 0.7);
}

.edit-modal-header {
  margin-bottom: 1.25rem;
  text-align: center;
}

.edit-modal-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  color: #b45309;
  background: #fef3c7;
  padding: 0.25rem 0.75rem;
  border-radius: 9999px;
  margin-bottom: 0.4rem;
}

[data-theme="dark"] .edit-modal-badge {
  background: #451a03;
  color: #fde68a;
}

.btn-edit-book {
  border-color: #fb923c !important;
  color: #ea580c !important;
  font-size: 0.85rem;
  padding: 0.45rem 0.85rem;
}

.btn-edit-book:hover {
  background: #fff7ed !important;
  border-color: #ea580c !important;
  transform: translateY(-2px);
}

[data-theme="dark"] .btn-edit-book {
  border-color: #9a3412 !important;
  color: #fdba74 !important;
}

[data-theme="dark"] .btn-edit-book:hover {
  background: #431407 !important;
}

.piyo-range-input {
  width: 100%;
  accent-color: #ea580c;
  cursor: pointer;
  height: 6px;
  border-radius: 9999px;
  background: #fed7aa;
}

[data-theme="dark"] .piyo-range-input {
  background: #443c37;
}

.piyo-select.full-width {
  width: 100%;
}

.edit-book-card .modal-actions {
  display: flex;
  flex-direction: row;
  justify-content: flex-end;
  gap: 0.75rem;
  margin-top: 1.5rem;
  padding-top: 1.15rem;
  border-top: 1px solid var(--border-color);
}

@media (max-width: 640px) {
  .edit-book-card {
    padding: 1.5rem 1.25rem;
    max-height: calc(100vh - 2rem);
    max-height: calc(100dvh - 2rem);
  }
}

@media (max-width: 480px) {
  .edit-book-card .modal-actions {
    flex-direction: column;
  }
}

/* --------------------------------------------------------------------------
   Add Book & File Upload Styles
   -------------------------------------------------------------------------- */
.target-drive-section {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.85rem 1rem;
  margin-bottom: 1rem;
}

.target-drive-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 0.45rem;
}

.target-drive-label {
  font-family: 'Prompt', sans-serif;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
}

.upload-mode-switcher {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1rem;
  background: var(--bg-primary);
  padding: 4px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

.mode-tab-btn {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.6rem 0.75rem;
  font-family: 'Prompt', sans-serif;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  background: transparent;
  border: none;
  border-radius: calc(var(--radius-md) - 2px);
  cursor: pointer;
  transition: all 0.2s ease;
}

.mode-tab-btn:hover {
  color: var(--text-primary);
  background: rgba(0, 0, 0, 0.04);
}

[data-theme="dark"] .mode-tab-btn:hover {
  background: rgba(255, 255, 255, 0.05);
}

.mode-tab-btn.active {
  background: var(--bg-card);
  color: var(--accent);
  box-shadow: var(--shadow-sm);
}

.file-dropzone {
  border: 2px dashed var(--border-color);
  background: var(--bg-primary);
  border-radius: var(--radius-lg);
  padding: 1.15rem 1rem;
  text-align: center;
  cursor: pointer;
  transition: all 0.25s ease;
}

.file-dropzone:hover,
.file-dropzone.dragover {
  border-color: var(--accent);
  background: rgba(37, 99, 235, 0.04);
  transform: translateY(-1px);
}

[data-theme="dark"] .file-dropzone:hover,
[data-theme="dark"] .file-dropzone.dragover {
  background: rgba(56, 189, 248, 0.06);
}

.dropzone-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.35rem;
}

.dropzone-icon {
  font-size: 1.85rem;
  line-height: 1;
  margin-bottom: 0.15rem;
}

.dropzone-prompt {
  font-family: 'Prompt', sans-serif;
  font-size: 0.95rem;
  color: var(--text-primary);
}

.dropzone-subtext {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* Upload Progress Card */
.upload-progress-card {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1rem;
  margin-bottom: 1rem;
}

.progress-file-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.65rem;
}

.file-details {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  overflow: hidden;
}

.file-badge {
  background: #fee2e2;
  color: #dc2626;
  font-weight: 700;
  font-size: 0.725rem;
  padding: 0.2rem 0.45rem;
  border-radius: 4px;
  flex-shrink: 0;
}

[data-theme="dark"] .file-badge {
  background: rgba(220, 38, 38, 0.25);
  color: #f87171;
}

.file-name {
  font-family: 'Prompt', sans-serif;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 260px;
}

.file-size {
  font-size: 0.775rem;
  color: var(--text-secondary);
  flex-shrink: 0;
}

.btn-remove-file {
  background: none;
  border: none;
  font-size: 1rem;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 0.2rem 0.4rem;
  border-radius: 4px;
}

.btn-remove-file:hover {
  background: var(--border-color);
  color: #ef4444;
}

.progress-track {
  width: 100%;
  height: 8px;
  background: var(--border-color);
  border-radius: 9999px;
  overflow: hidden;
  margin-bottom: 0.5rem;
}

.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, #2563eb, #38bdf8);
  border-radius: 9999px;
  transition: width 0.3s ease-out;
}

.progress-bar-fill.complete {
  background: #10b981 !important;
}

.progress-stats-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.785rem;
}

.progress-status {
  font-weight: 600;
  color: var(--accent);
}

.progress-status.success {
  color: #10b981;
}

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

/* Hidden Badge for Books */
.book-badge.hidden-badge {
  background: #fee2e2;
  color: #dc2626;
  border: 1px solid #fca5a5;
  font-weight: 600;
}

[data-theme="dark"] .book-badge.hidden-badge {
  background: rgba(220, 38, 38, 0.2);
  color: #f87171;
  border-color: rgba(239, 68, 68, 0.4);
}

/* Shelf Site Footer */
.shelf-site-footer {
  text-align: center;
  margin-top: 3.5rem;
  padding: 2.25rem 1rem 3.5rem;
  border-top: 1.5px solid rgba(226, 215, 203, 0.6);
  color: #78716c;
}

[data-theme="dark"] .shelf-site-footer {
  border-top-color: rgba(68, 64, 60, 0.6) !important;
  color: #a8a29e !important;
}

[data-theme="dark"] .shelf-site-footer .footer-brand-name {
  color: #f5f5f4 !important;
}

[data-theme="dark"] .shelf-site-footer .footer-brand-org {
  color: #d6d3d1 !important;
}

/* --------------------------------------------------------------------------
   Cozy BGM Audio Studio & Interactive Track Cards (AanChan Audio Suite)
   -------------------------------------------------------------------------- */
.bgm-studio-box {
  background: linear-gradient(145deg, #fffaf5 0%, #faf3eb 100%) !important;
  border: 1.5px solid #ebe1d5 !important;
  border-radius: 20px !important;
  padding: 1.15rem 1.25rem !important;
  box-shadow: 0 4px 16px rgba(249, 115, 22, 0.05);
}

[data-theme="dark"] .bgm-studio-box {
  background: linear-gradient(145deg, #2b2522 0%, #241f1d 100%) !important;
  border-color: #443c37 !important;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.25);
}

.bgm-control-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid rgba(226, 215, 203, 0.7);
  margin-bottom: 0.85rem;
  flex-wrap: wrap;
}

[data-theme="dark"] .bgm-control-bar {
  border-bottom-color: rgba(68, 60, 55, 0.7);
}

.bgm-volume-wrap {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex: 1;
  min-width: 200px;
}

.bgm-vol-icon {
  font-size: 1.15rem;
}

.bgm-vol-label {
  font-family: 'Prompt', sans-serif;
  font-size: 0.825rem;
  font-weight: 600;
  color: #786962;
  white-space: nowrap;
}

[data-theme="dark"] .bgm-vol-label {
  color: #a8a29e;
}

.bgm-vol-percent {
  font-family: 'Prompt', sans-serif;
  font-size: 0.825rem;
  font-weight: 700;
  color: #ea580c;
  min-width: 38px;
}

[data-theme="dark"] .bgm-vol-percent {
  color: #fb923c;
}

/* Editable Volume Input Box */
.bgm-vol-input-wrap {
  display: inline-flex;
  align-items: center;
  gap: 0.2rem;
  background: #ffffff;
  border: 1.5px solid #fed7aa;
  border-radius: 12px;
  padding: 0.2rem 0.5rem 0.2rem 0.35rem;
  box-shadow: 0 1px 4px rgba(234, 88, 12, 0.08);
  transition: all 0.2s ease;
}

[data-theme="dark"] .bgm-vol-input-wrap {
  background: #382e28;
  border-color: #574438;
  box-shadow: none;
}

.bgm-vol-input-wrap:focus-within {
  border-color: #ea580c;
  box-shadow: 0 0 0 3px rgba(234, 88, 12, 0.18);
  background: #ffffff;
}

[data-theme="dark"] .bgm-vol-input-wrap:focus-within {
  border-color: #fb923c;
  background: #2b2522;
}

.bgm-vol-number-input {
  width: 40px;
  height: 24px;
  padding: 0;
  border: none;
  background: transparent;
  font-family: 'Prompt', sans-serif;
  font-size: 0.925rem;
  font-weight: 700;
  color: #ea580c;
  text-align: center;
  outline: none !important;
  -moz-appearance: textfield;
}

.bgm-vol-number-input::-webkit-outer-spin-button,
.bgm-vol-number-input::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

[data-theme="dark"] .bgm-vol-number-input {
  color: #fb923c;
}

.bgm-vol-unit {
  font-family: 'Prompt', sans-serif;
  font-size: 0.825rem;
  font-weight: 700;
  color: #ea580c;
  user-select: none;
  line-height: 1;
}

[data-theme="dark"] .bgm-vol-unit {
  color: #fb923c;
}

/* Cozy Quick Play/Stop Button (Warm Pill Theme) */
.bgm-quick-btn,
#btnBgmQuickToggle {
  display: inline-flex !important;
  align-items: center !important;
  justify-content: center !important;
  gap: 0.45rem !important;
  padding: 0.45rem 1.15rem !important;
  border-radius: 9999px !important;
  font-family: 'Prompt', sans-serif !important;
  font-size: 0.825rem !important;
  font-weight: 600 !important;
  cursor: pointer !important;
  transition: all 0.25s cubic-bezier(0.34, 1.56, 0.64, 1) !important;
  outline: none !important;
  user-select: none !important;
  border: 1.5px solid #fed7aa !important;
  background: #fff7ed !important;
  color: #ea580c !important;
  box-shadow: 0 2px 8px rgba(234, 88, 12, 0.1) !important;
  white-space: nowrap !important;
}

[data-theme="dark"] #btnBgmQuickToggle,
[data-theme="dark"] .bgm-quick-btn {
  background: #382e28 !important;
  color: #fb923c !important;
  border-color: #574438 !important;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.25) !important;
}

#btnBgmQuickToggle:hover,
.bgm-quick-btn:hover {
  background: #ffedd5 !important;
  border-color: #fdba74 !important;
  transform: translateY(-1.5px);
  box-shadow: 0 4px 12px rgba(234, 88, 12, 0.18) !important;
}

[data-theme="dark"] #btnBgmQuickToggle:hover,
[data-theme="dark"] .bgm-quick-btn:hover {
  background: #473830 !important;
  border-color: #785a48 !important;
}

/* Active / Playing State for Quick Button */
#btnBgmQuickToggle.active,
#btnBgmQuickToggle.is-playing,
.bgm-quick-btn.active {
  background: linear-gradient(135deg, #ea580c 0%, #f97316 100%) !important;
  color: #ffffff !important;
  border-color: #ea580c !important;
  box-shadow: 0 4px 14px rgba(234, 88, 12, 0.35) !important;
}

#btnBgmQuickToggle.active:hover,
#btnBgmQuickToggle.is-playing:hover,
.bgm-quick-btn.active:hover {
  transform: translateY(-1.5px);
  box-shadow: 0 6px 18px rgba(234, 88, 12, 0.45) !important;
}

/* Category Filter Tabs for Tracks */
.bgm-genre-tabs {
  display: flex;
  gap: 0.45rem;
  overflow-x: auto;
  padding-bottom: 0.65rem;
  margin-bottom: 0.65rem;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

.bgm-genre-tabs::-webkit-scrollbar {
  display: none;
}

.bgm-tab-chip {
  padding: 0.4rem 0.85rem;
  border-radius: 9999px;
  border: 1px solid #e7ded3;
  background: #ffffff;
  color: #6b5c54;
  font-family: 'Prompt', sans-serif;
  font-size: 0.775rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.2s ease;
  outline: none !important;
}

[data-theme="dark"] .bgm-tab-chip {
  background: #332d29;
  border-color: #4a423d;
  color: #d6d3d1;
}

.bgm-tab-chip:hover {
  background: #fff7ed;
  border-color: #fed7aa;
  color: #ea580c;
}

.bgm-tab-chip.active {
  background: #ea580c;
  border-color: #ea580c;
  color: #ffffff;
  box-shadow: 0 2px 8px rgba(234, 88, 12, 0.3);
}

/* Sound Cards Grid */
.bgm-cards-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.55rem;
  max-height: 290px;
  overflow-y: auto;
  padding-right: 0.25rem;
  padding-bottom: 0.25rem;
}

.bgm-cards-grid::-webkit-scrollbar {
  width: 5px;
}

.bgm-cards-grid::-webkit-scrollbar-thumb {
  background: #ded5cb;
  border-radius: 10px;
}

[data-theme="dark"] .bgm-cards-grid::-webkit-scrollbar-thumb {
  background: #4a423d;
}

.bgm-track-card {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.75rem 1rem;
  border-radius: 14px;
  background: #ffffff;
  border: 1.5px solid #eee5da;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.34, 1.56, 0.64, 1);
  text-align: left;
  width: 100%;
  box-sizing: border-box;
  outline: none !important;
  user-select: none;
}

[data-theme="dark"] .bgm-track-card {
  background: #2e2825;
  border-color: #3e3733;
}

.bgm-track-card:hover {
  background: #fffdf9;
  border-color: #fbd38d;
  transform: translateY(-1.5px);
  box-shadow: 0 4px 12px rgba(249, 115, 22, 0.08);
}

[data-theme="dark"] .bgm-track-card:hover {
  background: #36302d;
  border-color: #524a45;
}

.bgm-track-card.active {
  background: #fff7ed !important;
  border-color: #f97316 !important;
  box-shadow: 0 4px 14px rgba(249, 115, 22, 0.18) !important;
}

[data-theme="dark"] .bgm-track-card.active {
  background: #3e2d24 !important;
  border-color: #fb923c !important;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.35) !important;
}

.bgm-card-icon-box {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: #fff1e5;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.35rem;
  flex-shrink: 0;
  transition: transform 0.2s ease;
}

[data-theme="dark"] .bgm-card-icon-box {
  background: #47352b;
}

.bgm-track-card.active .bgm-card-icon-box {
  transform: scale(1.08);
  background: #ea580c;
  color: #ffffff;
}

.bgm-card-text {
  flex: 1;
  min-width: 0;
}

.bgm-card-title {
  font-family: 'Prompt', sans-serif;
  font-size: 0.925rem;
  font-weight: 600;
  color: #332d29;
  margin: 0;
  line-height: 1.35;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

[data-theme="dark"] .bgm-card-title {
  color: #fafaf9;
}

.bgm-track-card.active .bgm-card-title {
  color: #c2410c;
}

[data-theme="dark"] .bgm-track-card.active .bgm-card-title {
  color: #fb923c;
}

.bgm-card-sub {
  font-size: 0.75rem;
  color: #8c7b72;
  margin: 0.15rem 0 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

[data-theme="dark"] .bgm-card-sub {
  color: #a8a29e;
}

.bgm-card-status {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.bgm-live-badge {
  font-family: 'Prompt', sans-serif;
  font-size: 0.725rem;
  font-weight: 700;
  padding: 0.2rem 0.55rem;
  border-radius: 9999px;
  background: rgba(234, 88, 12, 0.14);
  color: #ea580c;
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

[data-theme="dark"] .bgm-live-badge {
  background: rgba(251, 146, 60, 0.2);
  color: #fb923c;
}

/* Equalizer Bars Animation */
.equalizer-wave {
  display: inline-flex;
  align-items: flex-end;
  gap: 2px;
  height: 12px;
}

.equalizer-bar {
  width: 2.5px;
  background-color: currentColor;
  border-radius: 1px;
  animation: eqBounce 1s infinite ease-in-out;
}

.equalizer-bar:nth-child(1) { height: 6px; animation-delay: 0.0s; }
.equalizer-bar:nth-child(2) { height: 12px; animation-delay: 0.2s; }
.equalizer-bar:nth-child(3) { height: 8px; animation-delay: 0.4s; }

@keyframes eqBounce {
  0%, 100% { height: 4px; }
  50% { height: 12px; }
}

/* Floating Mini Music Bar (วางมุมซ้ายล่าง ไม่ทับซ้อนกับ dock bar หรือปุ่มอื่น) */
.floating-music-bar {
  position: fixed;
  bottom: 1.5rem;
  left: 1.5rem;
  transform: none;
  z-index: 420;
  width: auto;
  max-width: 320px;
  pointer-events: auto;
  animation: slideInMusicBar 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes slideInMusicBar {
  from {
    opacity: 0;
    transform: translateY(20px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@media (max-width: 768px) {
  .floating-music-bar {
    bottom: 5.25rem;
    left: 1rem;
    max-width: calc(100vw - 2rem);
  }
}

.floating-music-inner {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.55rem 0.95rem;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1.5px solid rgba(234, 88, 12, 0.25);
  border-radius: 9999px;
  box-shadow: 0 10px 25px -4px rgba(234, 88, 12, 0.18), 0 4px 10px rgba(0, 0, 0, 0.05);
}

[data-theme="dark"] .floating-music-inner {
  background: rgba(42, 37, 34, 0.94);
  border-color: rgba(251, 146, 60, 0.35);
  box-shadow: 0 10px 30px -4px rgba(0, 0, 0, 0.5);
}

.floating-music-disc {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, #fed7aa, #fb923c);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: 0 2px 8px rgba(249, 115, 22, 0.3);
  animation: spinDisc 4s linear infinite;
}

@keyframes spinDisc {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.floating-music-info {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.floating-music-name {
  font-family: 'Prompt', sans-serif;
  font-size: 0.85rem;
  font-weight: 600;
  color: #292524;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  line-height: 1.3;
}

[data-theme="dark"] .floating-music-name {
  color: #fafaf9;
}

.floating-music-sub {
  font-size: 0.7rem;
  color: #78716c;
  line-height: 1.2;
}

[data-theme="dark"] .floating-music-sub {
  color: #a8a29e;
}

.floating-music-actions {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-shrink: 0;
}

.floating-music-btn {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: none;
  background: #f5f0ea;
  color: #443c37;
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s ease;
  outline: none !important;
}

[data-theme="dark"] .floating-music-btn {
  background: #3e3834;
  color: #e7e5e4;
}

.floating-music-btn:hover {
  background: #ea580c;
  color: #ffffff;
  transform: scale(1.08);
}

/* ==========================================================================
   Cover Upload Dropzone & Preview Styles
   ========================================================================== */
.cover-dropzone {
  border: 2px dashed var(--border-color);
  background: var(--bg-primary);
  border-radius: var(--radius-lg);
  padding: 0.95rem 1rem;
  text-align: center;
  cursor: pointer;
  transition: all 0.25s ease;
}

.cover-dropzone:hover,
.cover-dropzone.dragover {
  border-color: var(--accent);
  background: rgba(37, 99, 235, 0.05);
  transform: translateY(-1px);
}

[data-theme="dark"] .cover-dropzone:hover,
[data-theme="dark"] .cover-dropzone.dragover {
  background: rgba(56, 189, 248, 0.08);
}

.cover-dropzone-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
}

.cover-dropzone-icon {
  font-size: 1.65rem;
  line-height: 1;
}

.cover-dropzone-text-group {
  display: flex;
  flex-direction: column;
  text-align: left;
  gap: 0.15rem;
}

.cover-dropzone-prompt {
  font-family: 'Prompt', sans-serif;
  font-size: 0.885rem;
  font-weight: 600;
  color: var(--text-primary);
}

.cover-dropzone-sub {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

/* Cover Preview Card */
.cover-preview-card {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 0.65rem 0.85rem;
  margin-top: 0.5rem;
}

.cover-thumb-container {
  width: 52px;
  height: 72px;
  border-radius: 6px;
  overflow: hidden;
  flex-shrink: 0;
  box-shadow: 0 2px 6px rgba(0,0,0,0.12);
  background: #e2e8f0;
}

.cover-thumb-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.cover-details {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  overflow: hidden;
  flex: 1;
}

.cover-file-name {
  font-family: 'Prompt', sans-serif;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.cover-file-size {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.cover-source-badge {
  font-size: 0.7rem;
  font-weight: 600;
  color: #15803d;
  background: #dcfce7;
  padding: 0.15rem 0.45rem;
  border-radius: 4px;
  align-self: flex-start;
}

[data-theme="dark"] .cover-source-badge {
  background: rgba(21, 128, 61, 0.25);
  color: #86efac;
}

.btn-remove-cover {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  color: var(--text-secondary);
  font-size: 0.85rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
  flex-shrink: 0;
}

.btn-remove-cover:hover {
  background: #fee2e2;
  color: #dc2626;
  border-color: #fca5a5;
}

/* ==========================================================================
   Large File Warning Advisory Banner
   ========================================================================== */
.large-file-warning-banner {
  display: flex;
  gap: 0.85rem;
  background: #fffbeb;
  border: 1.5px solid #fde68a;
  border-radius: var(--radius-lg);
  padding: 0.85rem 1rem;
  margin-top: 0.65rem;
  margin-bottom: 0.5rem;
}

[data-theme="dark"] .large-file-warning-banner {
  background: rgba(245, 158, 11, 0.1);
  border-color: rgba(245, 158, 11, 0.3);
}

.warning-badge-icon {
  font-size: 1.5rem;
  line-height: 1;
  flex-shrink: 0;
}

.warning-body {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.warning-title {
  font-family: 'Prompt', sans-serif;
  font-size: 0.885rem;
  color: #b45309;
}

[data-theme="dark"] .warning-title {
  color: #fbbf24;
}

.warning-text {
  font-size: 0.8rem;
  line-height: 1.45;
  color: #92400e;
  margin: 0;
}

[data-theme="dark"] .warning-text {
  color: #fde68a;
}

.warning-actions-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.4rem;
}

/* ==========================================================================
   Real-Time Processing Card & Step Indicators
   ========================================================================== */
.add-book-processing-card {
  background: var(--bg-primary);
  border: 1.5px solid var(--accent);
  border-radius: var(--radius-lg);
  padding: 1rem;
  margin-top: 0.85rem;
  margin-bottom: 0.85rem;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.08);
}

.proc-header {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  margin-bottom: 0.75rem;
}

.proc-spinner {
  width: 28px;
  height: 28px;
  border: 3px solid rgba(37, 99, 235, 0.2);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  flex-shrink: 0;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.proc-title-wrap {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.proc-title-wrap strong {
  font-family: 'Prompt', sans-serif;
  font-size: 0.925rem;
  color: var(--text-primary);
}

.proc-title-wrap span {
  font-size: 0.785rem;
  color: var(--text-secondary);
}

.proc-progress-track {
  width: 100%;
  height: 8px;
  background: var(--border-color);
  border-radius: 4px;
  overflow: hidden;
  margin-bottom: 0.75rem;
}

.proc-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent) 0%, #06b6d4 100%);
  border-radius: 4px;
  transition: width 0.35s ease;
}

.proc-steps-list {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.proc-step-item {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-size: 0.825rem;
  color: var(--text-secondary);
  transition: color 0.2s ease;
}

.proc-step-item.active {
  color: var(--accent);
  font-weight: 600;
}

.proc-step-item.completed {
  color: #16a34a;
}

.proc-step-num {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--border-color);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.725rem;
  font-weight: 700;
  flex-shrink: 0;
  transition: all 0.2s ease;
}

.proc-step-item.active .proc-step-num {
  background: var(--accent);
  color: #ffffff;
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.2);
}

.proc-step-item.completed .proc-step-num {
  background: #16a34a;
  color: #ffffff;
}

.proc-step-desc {
  flex: 1;
}

/* ==========================================================================
   Add Book Result/Success Modal Styles
   ========================================================================== */
.add-book-result-card {
  max-width: 440px !important;
  text-align: center;
  padding: 1.75rem 1.5rem !important;
}

.result-icon-banner {
  font-size: 3rem;
  margin-bottom: 0.5rem;
  line-height: 1;
}

.result-title {
  font-family: 'Prompt', sans-serif;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.result-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: 1.25rem;
}

.result-book-preview {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 0.85rem;
  text-align: left;
  margin-bottom: 1.25rem;
}

.result-thumb-wrap {
  width: 60px;
  height: 84px;
  border-radius: 6px;
  overflow: hidden;
  flex-shrink: 0;
  box-shadow: 0 3px 8px rgba(0,0,0,0.12);
  background: #e2e8f0;
}

.result-thumb {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.result-book-meta {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  overflow: hidden;
  flex: 1;
}

.result-book-name {
  font-family: 'Prompt', sans-serif;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.result-book-author {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.result-status-badge {
  font-size: 0.725rem;
  font-weight: 600;
  color: #15803d;
  background: #dcfce7;
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  align-self: flex-start;
}

[data-theme="dark"] .result-status-badge {
  background: rgba(21, 128, 61, 0.25);
  color: #86efac;
}

/* --------------------------------------------------------------------------
   Direct Google Drive Workflow & Edit Cover Upload Styles
   -------------------------------------------------------------------------- */
.drive-workflow-wrapper {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.drive-workflow-cards {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.drive-action-card {
  border-radius: 14px;
  padding: 1.1rem 1.2rem;
  border: 1.5px solid var(--border-color);
  background: var(--bg-card);
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.03);
}

.drive-action-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.07);
}

.drive-open-card {
  border-color: rgba(37, 99, 235, 0.25);
}

.drive-sync-card {
  border-color: rgba(5, 150, 105, 0.25);
}

.drive-card-header-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.drive-card-icon-badge {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: rgba(37, 99, 235, 0.1);
  color: #2563eb;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  flex-shrink: 0;
}

.drive-card-icon-badge.sync-badge {
  background: rgba(5, 150, 105, 0.12);
  color: #059669;
}

.drive-card-meta {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.drive-step-tag {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: #2563eb;
  background: rgba(37, 99, 235, 0.08);
  padding: 0.1rem 0.45rem;
  border-radius: 4px;
  align-self: flex-start;
}

.drive-step-tag.sync-tag {
  color: #059669;
  background: rgba(5, 150, 105, 0.1);
}

.drive-card-title {
  font-family: 'Prompt', sans-serif;
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0;
}

.drive-card-desc {
  font-size: 0.825rem;
  line-height: 1.5;
  color: var(--text-secondary);
  margin: 0;
}

.btn-hero-drive-open {
  background: linear-gradient(135deg, #2563eb, #1d4ed8);
  color: #ffffff;
  border: none;
  font-family: 'Prompt', sans-serif;
  font-weight: 700;
  font-size: 0.925rem;
  padding: 0.75rem 1.25rem;
  border-radius: 10px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  width: 100%;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.btn-hero-drive-open:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(37, 99, 235, 0.35);
  background: linear-gradient(135deg, #1d4ed8, #1e40af);
}

.btn-hero-drive-sync {
  background: linear-gradient(135deg, #059669, #047857);
  color: #ffffff;
  border: none;
  font-family: 'Prompt', sans-serif;
  font-weight: 700;
  font-size: 0.925rem;
  padding: 0.75rem 1.25rem;
  border-radius: 10px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  width: 100%;
  box-shadow: 0 4px 12px rgba(5, 150, 105, 0.25);
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.btn-hero-drive-sync:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(5, 150, 105, 0.35);
  background: linear-gradient(135deg, #047857, #065f46);
}

.btn-hero-drive-sync:disabled,
.btn-hero-drive-open:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.btn-hero-drive-open-large {
  background: linear-gradient(135deg, #2563eb, #1d4ed8) !important;
  color: #ffffff !important;
  border: 1px solid rgba(255, 255, 255, 0.25) !important;
  border-radius: 14px !important;
  padding: 1.1rem 1.35rem !important;
  display: flex !important;
  align-items: center !important;
  gap: 1rem !important;
  width: 100% !important;
  text-decoration: none !important;
  box-shadow: 0 6px 18px rgba(37, 99, 235, 0.3) !important;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1) !important;
  cursor: pointer !important;
  box-sizing: border-box !important;
}

.btn-hero-drive-open-large:hover {
  transform: translateY(-2px) !important;
  box-shadow: 0 8px 24px rgba(37, 99, 235, 0.45) !important;
  background: linear-gradient(135deg, #1d4ed8, #1e40af) !important;
  color: #ffffff !important;
}

.btn-hero-drive-sync-large {
  background: linear-gradient(135deg, #059669, #047857) !important;
  color: #ffffff !important;
  border: 1px solid rgba(255, 255, 255, 0.25) !important;
  border-radius: 14px !important;
  padding: 1.1rem 1.35rem !important;
  display: flex !important;
  align-items: center !important;
  gap: 1rem !important;
  width: 100% !important;
  text-decoration: none !important;
  box-shadow: 0 6px 18px rgba(5, 150, 105, 0.28) !important;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1) !important;
  cursor: pointer !important;
  box-sizing: border-box !important;
}

.btn-hero-drive-sync-large:hover {
  transform: translateY(-2px) !important;
  box-shadow: 0 8px 24px rgba(5, 150, 105, 0.42) !important;
  background: linear-gradient(135deg, #047857, #065f46) !important;
  color: #ffffff !important;
}

.big-btn-icon {
  font-size: 1.85rem;
  line-height: 1;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background: rgba(255, 255, 255, 0.22);
  border-radius: 12px;
}

.big-btn-content {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  text-align: left;
  flex: 1;
  min-width: 0;
}

.big-btn-title {
  font-family: 'Prompt', sans-serif;
  font-weight: 700;
  font-size: 1.05rem;
  color: #ffffff;
  line-height: 1.3;
}

.big-btn-desc {
  font-family: 'Sarabun', sans-serif;
  font-size: 0.825rem;
  color: rgba(255, 255, 255, 0.9);
  line-height: 1.35;
  margin-top: 0.2rem;
}

.drive-guide-card {
  background: rgba(245, 158, 11, 0.08);
  border: 1px solid rgba(245, 158, 11, 0.25);
  border-radius: 12px;
  padding: 0.85rem 1rem;
}

.guide-card-header {
  font-family: 'Prompt', sans-serif;
  font-size: 0.825rem;
  font-weight: 700;
  color: #b45309;
  margin-bottom: 0.45rem;
}

.guide-steps-list {
  margin: 0;
  padding-left: 1.25rem;
  font-size: 0.785rem;
  line-height: 1.6;
  color: var(--text-primary);
}

.guide-steps-list li {
  margin-bottom: 0.25rem;
}

.edit-cover-upload-wrapper {
  margin-top: 0.35rem;
}

[data-theme="dark"] .drive-action-card {
  background: var(--bg-card);
}

[data-theme="dark"] .drive-guide-card {
  background: rgba(245, 158, 11, 0.12);
  border-color: rgba(245, 158, 11, 0.3);
}

[data-theme="dark"] .guide-card-header {
  color: #fcd34d;
}

[data-theme="dark"] #editCoverPreviewBox {
  background: rgba(30, 41, 59, 0.6) !important;
  border-color: rgba(255, 255, 255, 0.1) !important;
}