/* CnReader global styles — light theme first, dark overrides below. */

:root {
  --bg: #f7f5f0;
  --bg-surface: #ffffff;
  --bg-elevated: #f0ede6;
  --fg: #2b2a26;
  --fg-muted: #7a7668;
  --accent: #b0442c;
  --accent-fg: #ffffff;
  --border: #e0dccf;
  --reader-bg: #faf8f3;
  --reader-fg: #33312c;
  --error: #c02b2b;
  --shadow: 0 1px 3px rgb(0 0 0 / 8%);
}

[data-theme="dark"] {
  --bg: #17181c;
  --bg-surface: #1f2127;
  --bg-elevated: #272a32;
  --fg: #e8e6df;
  --fg-muted: #9a9a92;
  --accent: #e07a5f;
  --accent-fg: #1c1410;
  --border: #33363f;
  --reader-bg: #1b1d22;
  --reader-fg: #cfcdc5;
  --error: #e06666;
  --shadow: 0 1px 3px rgb(0 0 0 / 40%);
}

/* ---------- base ---------- */

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, "Segoe UI", "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", sans-serif;
  font-size: 16px;
  line-height: 1.6;
}

a {
  color: var(--accent);
  text-decoration: none;
}

h1 {
  font-size: 1.5rem;
  margin: 0 0 1rem;
}

/* ---------- top bar ---------- */

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.6rem 1.2rem;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 10;
}

.app-name {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--fg);
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 0.8rem;
}

.username {
  color: var(--fg-muted);
}

/* ---------- layout ---------- */

.content {
  max-width: 1080px;
  margin: 0 auto;
  padding: 1.2rem;
}

/* ---------- buttons ---------- */

.btn {
  display: inline-block;
  padding: 0.5rem 1.1rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg-surface);
  color: var(--fg);
  cursor: pointer;
  font-size: 0.95rem;
  transition: filter 0.15s;
}

.btn:hover:not(:disabled) {
  filter: brightness(1.06);
}

.btn:disabled {
  opacity: 0.6;
  cursor: default;
}

.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-fg);
}

.btn-ghost {
  background: transparent;
  border-color: transparent;
}

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

.theme-toggle {
  font-size: 1.1rem;
  padding: 0.3rem 0.5rem;
}

/* ---------- auth pages ---------- */

.auth-page {
  display: flex;
  justify-content: center;
  padding-top: 8vh;
}

.auth-card {
  width: 100%;
  max-width: 380px;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  box-shadow: var(--shadow);
  padding: 1.8rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.auth-card label {
  font-size: 0.9rem;
  color: var(--fg-muted);
  margin-top: 0.4rem;
}

.auth-card input {
  padding: 0.55rem 0.7rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg);
  color: var(--fg);
  font-size: 1rem;
}

.auth-card .btn {
  margin-top: 1rem;
}

.auth-switch {
  text-align: center;
  color: var(--fg-muted);
  font-size: 0.9rem;
  margin-top: 0.6rem;
}

.form-error {
  color: var(--error);
  font-size: 0.9rem;
}

.auth-prompt {
  text-align: center;
  padding: 4rem 1rem;
  color: var(--fg-muted);
}

.library-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.library-header h1 {
  margin: 0;
}

/* ---------- book cards ---------- */

.book-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1rem;
}

.book-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: var(--shadow);
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  cursor: pointer;
  transition: transform 0.1s;
}

.book-card:hover {
  transform: translateY(-2px);
}

.book-card-title {
  font-weight: 600;
  font-size: 1.05rem;
}

.book-card-meta {
  color: var(--fg-muted);
  font-size: 0.85rem;
}

.book-card-progress {
  font-size: 0.85rem;
  color: var(--accent);
}

/* ---------- upload dialog ---------- */

.overlay {
  position: fixed;
  inset: 0;
  background: rgb(0 0 0 / 45%);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 20;
}

.dialog {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.5rem;
  width: min(480px, 92vw);
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.drop-zone {
  border: 2px dashed var(--border);
  border-radius: 8px;
  padding: 2rem 1rem;
  text-align: center;
  color: var(--fg-muted);
}

.drop-zone.dragging {
  border-color: var(--accent);
  color: var(--accent);
}

.progress-track {
  height: 8px;
  background: var(--bg-elevated);
  border-radius: 4px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--accent);
  transition: width 0.2s;
}

.dialog-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.6rem;
}

/* ---------- reader ---------- */

.reader-viewport {
  height: calc(100vh - 3rem);
  overflow-y: auto;
  background: var(--reader-bg);
  color: var(--reader-fg);
}

.reader-column {
  max-width: 46em;
  margin: 0 auto;
  padding: 2rem 1.2rem 40vh;
  font-family: var(--reader-font, serif);
  font-size: var(--reader-font-size, 20px);
  line-height: var(--reader-line-height, 1.8);
}

.reader-paragraph {
  margin: 0 0 0.9em;
  white-space: pre-wrap;
  word-break: break-word;
}

.reader-paragraph.speaking {
  background: var(--bg-elevated);
  border-radius: 4px;
  outline: 1px solid var(--accent);
}

.chapter-title {
  font-size: 1.4em;
  font-weight: 700;
  margin: 0 0 1.2em;
}

/* ---------- TOC drawer ---------- */

.toc-drawer {
  position: fixed;
  top: 0;
  right: 0;
  height: 100vh;
  width: min(320px, 85vw);
  background: var(--bg-surface);
  border-left: 1px solid var(--border);
  box-shadow: var(--shadow);
  z-index: 20;
  display: flex;
  flex-direction: column;
}

.toc-header {
  padding: 0.8rem 1rem;
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.toc-list {
  flex: 1;
  overflow-y: auto;
}

.toc-item {
  padding: 0.6rem 1rem;
  cursor: pointer;
  border-bottom: 1px solid var(--border);
  font-size: 0.95rem;
}

.toc-item:hover {
  background: var(--bg-elevated);
}

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

.bookmark-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
}

.bookmark-info {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  cursor: pointer;
}

.toc-volume {
  padding: 0.5rem 1rem;
  color: var(--fg-muted);
  font-size: 0.85rem;
  font-weight: 600;
  background: var(--bg-elevated);
  cursor: default;
}

.drop-zone {
  position: relative;
}

/* Hidden, not removed: the InputFile inside must stay mounted (see UploadDialog). */
.drop-zone-hidden {
  display: none;
}

.upload-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  max-height: 45vh;
  overflow-y: auto;
}

.upload-row {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  padding: 0.45rem 0.6rem;
  border: 1px solid var(--border);
  border-radius: 6px;
}

.upload-name {
  font-size: 0.9rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.upload-bar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.upload-bar .progress-track {
  flex: 1;
}

.upload-status {
  font-size: 0.85rem;
  color: var(--fg-muted);
  white-space: nowrap;
}

.file-input-overlay {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: pointer;
}

/* ---------- empty state ---------- */

.empty-state {
  text-align: center;
  color: var(--fg-muted);
  padding: 4rem 1rem;
}

/* ---------- reader chrome ---------- */

.reader-shell {
  display: flex;
  flex-direction: column;
  height: 100vh;
}

.reader-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem;
  padding: 0.5rem 0.8rem;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.reader-book-title {
  font-weight: 600;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.tts-speed {
  display: inline-flex;
  align-items: center;
}

.tts-speed .tts-speed-active {
  color: var(--accent);
  font-weight: 700;
}

.saved-badge {
  color: var(--fg-muted);
  font-size: 0.85rem;
}

.reader-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem;
  padding: 0.5rem 0.8rem;
  background: var(--bg-surface);
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}

.tts-banner {
  padding: 0.6rem 1rem;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border);
  font-size: 0.9rem;
  flex-shrink: 0;
}

.reader-settings {
  display: flex;
  flex-wrap: wrap;
  gap: 1.2rem;
  align-items: center;
  padding: 0.7rem 1rem;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  font-size: 0.9rem;
  color: var(--fg-muted);
}

.reader-settings label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.reader-settings select {
  padding: 0.3rem 0.5rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg);
  color: var(--fg);
}

/* ---------- responsive ---------- */

@media (max-width: 600px) {
  .content {
    padding: 0.8rem;
  }

  .reader-column {
    padding: 1.2rem 1rem 40vh;
  }
}