/* ============================================================
   TPOB Reader Web - style.css
   精确匹配 Android 端 Material 3 规格
   ============================================================ */

/* ========== 日间 (match Color.kt) ========== */
:root {
  --primary: #5B4A3F;
  --on-primary: #FFFFFF;
  --primary-container: #EFDBD0;
  --on-primary-container: #1F130C;
  --secondary: #6B5E53;
  --background: #FBF5F0;
  --on-background: #1F130C;
  --surface: #FBF5F0;
  --on-surface: #1F130C;
  --surface-variant: #E7DDD5;
  --on-surface-variant: #4A433D;
  --error: #BA1A1A;

  --reader-bg: #F5F0E8;
  --reader-text: #2D2D2D;
  --reader-link: #5B4A3F;
  --reader-code-bg: #E8E0D5;
  --reader-border: #D5CFC5;
  --reader-quote: #666666;

  --card-bg: rgba(231, 221, 213, 0.5);
}

/* ========== 夜间 (match Color.kt) ========== */
.dark {
  --primary: #D4BBA5;
  --on-primary: #3D2E24;
  --primary-container: #3D2E24;
  --on-primary-container: #EFDBD0;
  --secondary: #C4B5A8;
  --background: #1A1A1A;
  --on-background: #E0E0E0;
  --surface: #2D2D2D;
  --on-surface: #E0E0E0;
  --surface-variant: #3D3D3D;
  --on-surface-variant: #C4B5A8;
  --error: #FFB4AB;

  --reader-bg: #1A1A1A;
  --reader-text: #C8C8C8;
  --reader-link: #8AB4F8;
  --reader-code-bg: #2D2D2D;
  --reader-border: #3D3D3D;
  --reader-quote: #A0A0A0;

  --card-bg: rgba(61, 61, 61, 0.5);
}

/* ========== 基础 ========== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { -webkit-tap-highlight-color: transparent; }
body {
  font-family: -apple-system, "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  background: var(--background);
  color: var(--on-background);
  min-height: 100dvh;
  transition: background 0.3s, color 0.3s;
  -webkit-font-smoothing: antialiased;
}

/* ========== Header (match TopAppBar) ========== */
#header {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  height: 56px;
  padding: 0 4px;
  background: var(--background);
  border-bottom: none;
}
#header-title {
  flex: 1;
  font-size: 18px;
  font-weight: 500;
  text-align: center;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  padding: 0 8px;
  letter-spacing: 0.01em;
}
.icon-btn {
  background: none;
  border: none;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--on-surface);
  flex-shrink: 0;
  transition: background 0.2s;
}
.icon-btn:hover { background: rgba(128,128,128,0.08); }
.icon-btn:active { background: rgba(128,128,128,0.15); }

#theme-btn-wrap {
  width: 72px;
  height: 48px;
  overflow: hidden;
  border-radius: 24px;
  flex-shrink: 0;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}
#theme-btn-wrap theme-button {
  display: block;
}

.hidden { display: none !important; }

/* ========== 书架 (match LibraryScreen) ========== */
#view-library {
  padding: 12px;
  padding-bottom: 80px;
  min-height: calc(100dvh - 56px);
}
.books-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}
.empty-hint {
  text-align: center;
  padding: 80px 20px;
  color: var(--on-surface-variant);
  opacity: 0.7;
}
.empty-hint svg { margin-bottom: 16px; }
.empty-hint .sub { font-size: 14px; margin-top: 8px; opacity: 0.7; }

/* FAB (match FloatingActionButton, containerColor = primary) */
.fab {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 56px;
  height: 56px;
  border-radius: 16px;
  border: none;
  background: var(--primary);
  color: var(--on-primary);
  cursor: pointer;
  box-shadow: 0 3px 5px rgba(0,0,0,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 90;
  transition: box-shadow 0.2s, opacity 0.2s;
}
.fab:hover { box-shadow: 0 6px 10px rgba(0,0,0,0.25); }
.fab:active { opacity: 0.85; }

/* ========== 书籍卡片 (match BookCard) ========== */
.book-card {
  background: var(--card-bg);
  border-radius: 8px;
  padding: 8px;
  cursor: pointer;
  user-select: none;
  transition: background 0.15s;
}
.book-card:active { background: var(--surface-variant); }
.book-cover {
  width: 100%;
  aspect-ratio: 0.75;
  border-radius: 4px;
  overflow: hidden;
  background: var(--primary-container);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 8px;
}
.book-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.book-cover-placeholder {
  font-size: 22px;
  font-weight: 700;
  color: var(--on-primary-container);
}
.book-title {
  font-size: 14px;
  font-weight: 500;
  line-height: 1.3;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  text-align: center;
  color: var(--on-surface);
}
.book-author {
  font-size: 11px;
  font-weight: 400;
  color: var(--on-surface-variant);
  text-align: center;
  margin-top: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ========== 阅读器 (match ReaderScreen + wrapHtml) ========== */
#view-reader {
  min-height: calc(100dvh - 56px);
  padding: 16px 20px 40px;
  background: var(--reader-bg);
  transition: background 0.3s;
}
.reader-content {
  max-width: 720px;
  margin: 0 auto;
  font-size: 17px;
  line-height: 1.8;
  color: var(--reader-text);
  word-wrap: break-word;
  overflow-wrap: break-word;
  transition: color 0.3s;
}
.reader-content h1 { font-size: 1.6em; margin: 0.8em 0 0.5em; font-weight: 700; }
.reader-content h2 { font-size: 1.4em; margin: 0.7em 0 0.4em; font-weight: 600; }
.reader-content h3 { font-size: 1.2em; margin: 0.6em 0 0.3em; font-weight: 600; }
.reader-content p { margin: 0.6em 0; }
.reader-content img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 12px auto;
  border-radius: 4px;
}
.reader-content blockquote {
  border-left: 3px solid var(--reader-border);
  padding: 4px 0 4px 14px;
  margin: 12px 0;
  color: var(--reader-quote);
  font-style: italic;
}
.reader-content code {
  background: var(--reader-code-bg);
  padding: 2px 6px;
  border-radius: 3px;
  font-family: "JetBrains Mono", "Fira Code", monospace;
  font-size: 0.88em;
}
.reader-content pre {
  background: var(--reader-code-bg);
  padding: 14px 16px;
  border-radius: 6px;
  overflow-x: auto;
  margin: 12px 0;
  font-size: 0.85em;
}
.reader-content pre code { background: none; padding: 0; }
.reader-content ul, .reader-content ol { padding-left: 1.5em; margin: 8px 0; }
.reader-content li { margin: 4px 0; }
.reader-content table {
  border-collapse: collapse;
  width: 100%;
  margin: 12px 0;
  font-size: 0.9em;
}
.reader-content th, .reader-content td {
  border: 1px solid var(--reader-border);
  padding: 8px 10px;
  text-align: left;
}
.reader-content th { background: var(--reader-code-bg); font-weight: 600; }
.reader-content hr { border: none; border-top: 1px solid var(--reader-border); margin: 20px 0; }
.reader-content a { color: var(--reader-link); text-decoration: none; }
.reader-content strong { font-weight: 600; }

/* ========== 加载 ========== */
.loading {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 200;
  color: #fff;
  gap: 16px;
}
.spinner {
  width: 40px;
  height: 40px;
  border: 4px solid rgba(255,255,255,0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ========== 对话框 (match AlertDialog) ========== */
.dialog-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  padding: 24px;
}
.dialog-box {
  background: var(--surface);
  border-radius: 24px;
  padding: 24px;
  max-width: 312px;
  width: 100%;
  box-shadow: 0 8px 24px rgba(0,0,0,0.2);
}
.dialog-box h3 {
  font-size: 16px;
  font-weight: 500;
  margin-bottom: 8px;
  color: var(--on-surface);
}
.dialog-box p {
  font-size: 14px;
  line-height: 1.5;
  color: var(--on-surface-variant);
  margin-bottom: 24px;
}
.dialog-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
}
.btn {
  padding: 10px 24px;
  border: none;
  border-radius: 20px;
  background: none;
  color: var(--primary);
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.03em;
  transition: background 0.2s;
}
.btn:hover { background: rgba(128,128,128,0.08); }
.btn:active { background: rgba(128,128,128,0.15); }
.btn-danger { color: var(--error); }

/* ========== Toast (match Snackbar) ========== */
.toast {
  position: fixed;
  bottom: 96px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--on-surface-variant);
  color: var(--surface);
  padding: 10px 24px;
  border-radius: 20px;
  font-size: 14px;
  z-index: 300;
  animation: toast-in 0.3s ease;
  pointer-events: none;
  white-space: nowrap;
}
@keyframes toast-in { from { opacity: 0; transform: translateX(-50%) translateY(8px); } }

@media (min-width: 600px) {
  .books-grid { grid-template-columns: repeat(4, 1fr); }
}
@media (min-width: 900px) {
  .books-grid { grid-template-columns: repeat(5, 1fr); }
  #view-library { padding: 24px 40px; }
}