/* ============================================================
   墨读 · 阅读器
   ============================================================ */

#view-reader {
  /* 阅读主题变量（默认白） */
  --read-bg: #FFFFFF;
  --read-fg: #1A1D24;
  --read-fg-soft: #8A9099;
  --read-line: rgba(26, 29, 36, .12);
  --read-pad-t: 70px;
  --read-pad-r: 34px;
  --read-pad-b: 66px;
  --read-pad-l: 34px;
  --reader-font-size: 19px;
  --reader-line-height: 1.85;
  background: var(--read-bg);
  color: var(--read-fg);
}

@media (min-width: 700px) {
  #view-reader { --read-pad-r: 8%; --read-pad-l: 8%; --read-pad-t: 84px; --read-pad-b: 78px; }
  #view-reader[data-margin="narrow"] { --read-pad-r: 3%; --read-pad-l: 3%; }
  #view-reader[data-margin="wide"] { --read-pad-r: 14%; --read-pad-l: 14%; }
}
@media (max-width: 699px) {
  #view-reader { --read-pad-r: 22px; --read-pad-l: 22px; }
  #view-reader[data-margin="narrow"] { --read-pad-r: 12px; --read-pad-l: 12px; }
  #view-reader[data-margin="wide"] { --read-pad-r: 32px; --read-pad-l: 32px; }
}

/* 阅读背景主题 */
#view-reader.theme-light { --read-bg: #FFFFFF; --read-fg: #1A1D24; --read-fg-soft: #8A9099; --read-line: rgba(26,29,36,.10); }
#view-reader.theme-sepia { --read-bg: #F6EFE0; --read-fg: #4A3F2E; --read-fg-soft: #A9977D; --read-line: rgba(74,63,46,.14); }
#view-reader.theme-green { --read-bg: #E6EFE4; --read-fg: #2F3A2C; --read-fg-soft: #86957F; --read-line: rgba(47,58,44,.14); }
#view-reader.theme-dark  { --read-bg: #15171C; --read-fg: #B9BEC8; --read-fg-soft: #666C78; --read-line: rgba(255,255,255,.11); }

/* 字体族 */
#view-reader.font-serif  .reader-content { font-family: "Songti SC", "Source Han Serif SC", "Noto Serif CJK SC", Georgia, "SimSun", serif; }
#view-reader.font-sans   .reader-content { font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif; }
#view-reader.font-system .reader-content { font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", sans-serif; }

/* ---------- 舞台 ---------- */
.reader-stage {
  position: absolute;
  inset: 0;
  overflow: hidden;
  background: var(--read-bg);
}

.reader-inner {
  position: absolute;
  inset: var(--read-pad-t) var(--read-pad-r) var(--read-pad-b) var(--read-pad-l);
  overflow: hidden;
}

/* 宽屏（iPad 横屏 / 桌面）限制正文行宽，避免一行几十字影响阅读 */
@media (min-width: 900px) {
  .reader-inner {
    left: 0;
    right: 0;
    max-width: 820px;
    margin-left: auto;
    margin-right: auto;
  }
}

/* ---------- 正文（分页模式） ---------- */
.reader-content {
  width: 100%;
  height: 100%;
  margin: 0;
  font-size: var(--reader-font-size);
  line-height: var(--reader-line-height);
  color: var(--read-fg);
  overflow-wrap: break-word;
  word-break: break-word;
  -webkit-hyphens: auto;
  hyphens: auto;
  column-fill: auto;
  column-width: var(--col-w, 100%);
  column-gap: var(--col-gap, 40px);
  transition: transform .3s cubic-bezier(.32, .82, .3, 1);
  will-change: transform;
  outline: none;
}
.reader-content.is-nocolumn {
  height: auto;
  column-width: auto;
  column-count: auto;
  transform: none !important;
  transition: none;
}

/* 滚动模式：外层滚动 */
.reader-inner.is-scroll {
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  overscroll-behavior-y: contain;
}
.reader-inner.is-scroll .reader-content { padding-bottom: 40px; }

/* 滚动模式 + 长书：每段一个容器，屏幕外的段让浏览器跳过布局，滚动才不卡 */
.reader-content .flow-seg {
  content-visibility: auto;
  contain-intrinsic-size: auto 900px;
}

/* 正文排版 */
.reader-content p { margin: 0 0 .72em; text-indent: 2em; }
.reader-content p.no-indent { text-indent: 0; }
.reader-content h1,
.reader-content h2,
.reader-content h3 {
  margin: 1.5em 0 .7em;
  line-height: 1.45;
  font-weight: 600;
  text-indent: 0;
  break-after: avoid;
}
.reader-content h1 { font-size: 1.42em; margin-top: .9em; }
.reader-content h2 { font-size: 1.24em; }
.reader-content h3 { font-size: 1.1em; }
.reader-content .chapter-start { break-before: column; }
.reader-content img,
.reader-content svg,
.reader-content video {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 1em auto;
  break-inside: avoid;
  border-radius: 3px;
}
.reader-content figure { margin: 1.1em 0; break-inside: avoid; text-align: center; }
.reader-content figcaption {
  margin-top: .5em;
  font-size: .78em;
  line-height: 1.6;
  color: var(--read-fg-soft);
  text-indent: 0;
}
.reader-content blockquote {
  margin: .9em 0;
  padding: .1em 0 .1em 1em;
  border-left: 3px solid var(--read-line);
  color: var(--read-fg-soft);
}
.reader-content blockquote p { text-indent: 0; }
.reader-content hr {
  border: 0;
  border-top: 1px solid var(--read-line);
  margin: 1.6em 12%;
}
.reader-content a { color: inherit; text-decoration: underline; text-decoration-color: var(--read-line); }
.reader-content table {
  width: 100%;
  border-collapse: collapse;
  font-size: .88em;
  margin: 1em 0;
}
.reader-content th, .reader-content td {
  border: 1px solid var(--read-line);
  padding: .4em .6em;
  text-indent: 0;
  text-align: left;
}
.reader-content pre {
  overflow-x: auto;
  padding: .8em 1em;
  border-radius: 6px;
  background: var(--read-line);
  font-size: .82em;
  line-height: 1.6;
  text-indent: 0;
}
.reader-content code { font-size: .9em; }

/* 图片占位（懒加载前） */
.reader-content .img-ph {
  display: block;
  width: 100%;
  background: var(--read-line);
  border-radius: 4px;
  margin: 1em auto;
}

/* ---------- 图片阅读模式 ---------- */
.reader-image-view {
  position: absolute;
  inset: 0;
  z-index: 3;
  display: flex;
  overflow-y: auto;
  overflow-x: hidden;
  background: var(--read-bg);
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.reader-image-view::-webkit-scrollbar,
.reader-image-view::-webkit-scrollbar-thumb,
.reader-image-view::-webkit-scrollbar-track {
  width: 0;
  height: 0;
  display: none;
}
.reader-image-view.is-paged {
  flex-direction: row;
  overflow-x: auto;
  overflow-y: hidden;
  scroll-snap-type: x mandatory;
}
.reader-image-view > .img-page {
  flex: 0 0 100%;
  min-height: 100%;
  display: grid;
  place-items: center;
  padding: var(--read-pad-t) var(--read-pad-r) var(--read-pad-b) var(--read-pad-l);
  scroll-snap-align: center;
  scroll-snap-stop: always;
}
.reader-image-view:not(.is-paged) > .img-page { min-height: 0; padding-bottom: 24px; }
.reader-image-view img {
  max-width: 100%;
  max-height: 100%;
  width: auto;
  height: auto;
  object-fit: contain;
  display: block;
  background: #fff;
  box-shadow: 0 2px 10px -2px rgba(0, 0, 0, .25);
}
.reader-image-view.is-paged img { max-height: calc(100vh - var(--read-pad-t) - var(--read-pad-b)); }

/* 双击放大：该页容器变成可滚动区，图按倍数铺开，单指拖动查看 */
.reader-image-view.is-paged > .img-page.is-zoomed {
  overflow: auto;
  place-items: start;
  padding: 0;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.reader-image-view.is-paged > .img-page.is-zoomed::-webkit-scrollbar {
  width: 0;
  height: 0;
  display: none;
}
.reader-image-view.is-paged > .img-page.is-zoomed img {
  max-width: none;
  max-height: none;
  height: 190%;
  width: auto;
  margin: 0;
  box-shadow: none;
}
.reader-image-view .img-caption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--read-fg-soft);
  text-align: center;
  max-width: 720px;
  white-space: pre-wrap;
}

/* ---------- 加载 ---------- */
.reader-loading {
  position: absolute;
  inset: 0;
  z-index: 6;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--read-bg);
}
.reader-loading .spinner {
  width: 26px;
  height: 26px;
  border-width: 2.5px;
  border-color: var(--read-line);
  border-top-color: var(--read-fg-soft);
}

/* ============================================================
   HUD
   ============================================================ */
.hud {
  position: absolute;
  left: 0;
  right: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--read-fg);
  background: color-mix(in srgb, var(--read-bg) 88%, transparent);
  -webkit-backdrop-filter: saturate(160%) blur(16px);
  backdrop-filter: saturate(160%) blur(16px);
  transition: transform .28s cubic-bezier(.32, .82, .3, 1), opacity .24s ease;
}
@supports not (backdrop-filter: blur(1px)) {
  .hud { background: color-mix(in srgb, var(--read-bg) 96%, transparent); }
}

.hud-top {
  top: 0;
  height: calc(56px + var(--safe-t));
  padding: var(--safe-t) calc(8px + var(--safe-r)) 0 calc(8px + var(--safe-l));
  border-bottom: 1px solid var(--read-line);
}
.hud-bottom {
  bottom: 0;
  flex-direction: column;
  align-items: stretch;
  gap: 0;
  padding: 0 calc(12px + var(--safe-r)) calc(8px + var(--safe-b)) calc(12px + var(--safe-l));
  border-top: 1px solid var(--read-line);
}

#view-reader.hud-hidden .hud-top { transform: translateY(-102%); opacity: 0; pointer-events: none; }
#view-reader.hud-hidden .hud-bottom { transform: translateY(102%); opacity: 0; pointer-events: none; }

.hud-btn {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  flex: 0 0 auto;
  border-radius: 10px;
  color: var(--read-fg);
  opacity: .82;
  transition: opacity .16s ease, background-color .16s ease, transform .12s ease;
}
.hud-btn:active { opacity: 1; transform: scale(.92); background: var(--read-line); }
.hud-btn svg { width: 20px; height: 20px; }

.hud-title {
  flex: 1 1 auto;
  min-width: 0;
  text-align: center;
  padding: 0 4px;
}
.hud-book-title {
  font-size: 14px;
  font-weight: 550;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.hud-chapter {
  font-size: 11.5px;
  margin-top: 1px;
  color: var(--read-fg-soft);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.progress-track {
  height: 3px;
  margin: 0 2px 6px;
  border-radius: 2px;
  background: var(--read-line);
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  width: 0%;
  border-radius: 2px;
  background: var(--read-fg-soft);
  transition: width .28s cubic-bezier(.32, .82, .3, 1);
}
.hud-bottom-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  min-height: 46px;
}
.hud-bottom-actions { display: flex; align-items: center; gap: 2px; }
.hud-progress-text {
  padding-left: 6px;
  font-size: 12.5px;
  font-variant-numeric: tabular-nums;
  color: var(--read-fg-soft);
}

.hud-scrim {
  position: absolute;
  inset: 0;
  z-index: 9;
  display: none;
  background: transparent;
}
#view-reader.is-hud-open .hud-scrim { display: block; }

/* ============================================================
   底部面板（设置 / 目录）
   ============================================================ */
.panel {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 20;
  max-height: 76%;
  display: flex;
  flex-direction: column;
  color: var(--read-fg);
  background: color-mix(in srgb, var(--read-bg) 96%, transparent);
  -webkit-backdrop-filter: saturate(180%) blur(22px);
  backdrop-filter: saturate(180%) blur(22px);
  border-top: 1px solid var(--read-line);
  border-radius: 18px 18px 0 0;
  box-shadow: 0 -10px 40px -14px rgba(0, 0, 0, .3);
  padding-bottom: var(--safe-b);
  animation: panel-up .3s cubic-bezier(.22, .9, .3, 1);
}
@keyframes panel-up { from { transform: translateY(100%); } }

.panel-inner { padding: 20px calc(20px + var(--safe-r)) 16px calc(20px + var(--safe-l)); overflow-y: auto; }

.setting-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 11px 0;
}
.setting-label { font-size: 14.5px; color: var(--read-fg); flex: 0 0 auto; }

.stepper {
  display: flex;
  align-items: center;
  gap: 3px;
  padding: 3px;
  border-radius: 10px;
  background: var(--read-line);
}
.stepper button {
  min-width: 52px;
  height: 36px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 550;
  color: var(--read-fg);
  background: color-mix(in srgb, var(--read-bg) 88%, transparent);
}
.stepper button:disabled { opacity: .32; }
.stepper button:active:not(:disabled) { opacity: .6; }
.stepper span {
  min-width: 40px;
  text-align: center;
  font-size: 14px;
  font-variant-numeric: tabular-nums;
}

.segmented {
  display: flex;
  gap: 3px;
  padding: 3px;
  border-radius: 10px;
  background: var(--read-line);
}
.segmented button {
  min-width: 58px;
  height: 34px;
  padding: 0 12px;
  border-radius: 8px;
  font-size: 13.5px;
  color: var(--read-fg);
  opacity: .62;
  white-space: nowrap;
  transition: background-color .16s ease, opacity .16s ease;
}
.segmented button.is-on {
  opacity: 1;
  font-weight: 550;
  background: color-mix(in srgb, var(--read-bg) 92%, transparent);
  box-shadow: 0 1px 3px rgba(0, 0, 0, .1);
}

.theme-swatches { display: flex; gap: 9px; }
.theme-swatches button {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  padding: 2px;
  border: 2px solid transparent;
  transition: border-color .16s ease, transform .12s ease;
}
.theme-swatches button.is-on { border-color: var(--read-fg); }
.theme-swatches button:active { transform: scale(.92); }
.theme-swatches i {
  display: block;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  border: 1px solid rgba(0, 0, 0, .1);
  font-style: normal;
}

.panel-foot { display: flex; justify-content: center; padding-top: 14px; }
.panel-foot .btn { min-height: 40px; font-size: 14px; }
#view-reader .btn-ghost {
  background: var(--read-line);
  border-color: transparent;
  color: var(--read-fg);
}

/* 目录 */
.panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px calc(14px + var(--safe-r)) 12px calc(20px + var(--safe-l));
  border-bottom: 1px solid var(--read-line);
  font-size: 15px;
  font-weight: 600;
  flex: 0 0 auto;
}
.toc-list { overflow-y: auto; padding: 6px 0 10px; }
.toc-item {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 13px calc(20px + var(--safe-r)) 13px calc(20px + var(--safe-l));
  font-size: 14.5px;
  line-height: 1.5;
  color: var(--read-fg);
  text-align: left;
  opacity: .82;
  border-radius: 0 10px 10px 0;
}
.toc-item:active { background: var(--read-line); }
.toc-item.is-current {
  opacity: 1;
  font-weight: 600;
  background: color-mix(in srgb, var(--read-fg) 8%, transparent);
}
.toc-item.is-current::before {
  content: "";
  width: 3px;
  height: 16px;
  flex: 0 0 auto;
  border-radius: 2px;
  background: currentColor;
}
.toc-item.is-sub { padding-left: calc(38px + var(--safe-l)); font-size: 13.5px; opacity: .7; }
.toc-empty { padding: 34px 20px; text-align: center; font-size: 13.5px; color: var(--read-fg-soft); }

/* ---------- PDF ---------- */
.reader-image-view.is-pdf {
  display: block;
  padding: 0;
  overflow: hidden;
}
.reader-image-view.is-pdf .pdf-frame {
  width: 100%;
  height: 100%;
  border: 0;
  display: block;
  background: #ffffff;
}