:root {
  --bg: #111318;
  --panel: #171a20;
  --panel-strong: #1c2027;
  --line: #2b313b;
  --text: #e3e7ee;
  --muted: #929cab;
  --accent: #6ea8fe;
  --hover: rgba(255, 255, 255, 0.07);
  --title-start: #171b26;
  --title-end: #12141c;
}

:root[data-ui-theme="light"] {
  --bg: #eef2f7;
  --panel: #ffffff;
  --panel-strong: #f7f9fc;
  --line: #d5dde8;
  --text: #1f2937;
  --muted: #667386;
  --accent: #2563eb;
  --hover: rgba(15, 23, 42, 0.07);
  --title-start: #ffffff;
  --title-end: #f1f4f8;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  color: var(--text);
  background: var(--bg);
  font-family: "Microsoft YaHei", "PingFang SC", "Segoe UI", sans-serif;
}

body {
  display: flex;
  flex-direction: column;
}

button, input { font: inherit; }
.hidden { display: none !important; }

.titlebar {
  height: 44px;
  flex: 0 0 44px;
  display: flex;
  align-items: center;
  padding-left: 14px;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(135deg, var(--title-start), var(--title-end));
  -webkit-app-region: drag;
}

.brand {
  min-width: 0;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--accent);
  font-size: 15px;
  font-weight: 700;
}

.brand-logo { width: 25px; height: 25px; border-radius: 6px; }
.brand-logo-light { display: none; }
:root[data-ui-theme="light"] .brand-logo-dark { display: none; }
:root[data-ui-theme="light"] .brand-logo-light { display: block; }

.brand-sub {
  min-width: 0;
  max-width: 56vw;
  overflow: hidden;
  color: var(--muted);
  font-size: 12px;
  font-weight: 400;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.titlebar-spacer { flex: 1; }
.titlebar-controls { height: 100%; display: flex; -webkit-app-region: no-drag; }

.win-btn {
  width: 46px;
  border: 0;
  color: var(--text);
  background: transparent;
  cursor: pointer;
}

.win-btn:hover { background: var(--hover); }
.win-close:hover { color: #fff; background: #c42b1c; }

.toolbar {
  min-height: 48px;
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 12px;
  border-bottom: 1px solid var(--line);
  background: var(--panel);
}

.tool-btn, .load-more, .chapter-end, .icon-btn {
  border: 1px solid var(--line);
  border-radius: 7px;
  color: var(--text);
  background: var(--panel-strong);
  cursor: pointer;
}

.tool-btn { height: 32px; padding: 0 13px; }
.tool-btn:hover, .load-more:hover, .chapter-end:hover, .icon-btn:hover { border-color: var(--accent); }
.tool-btn:disabled { cursor: default; opacity: 0.42; }

.chapter-title {
  min-width: 120px;
  max-width: 30vw;
  overflow: hidden;
  color: var(--text);
  font-size: 13px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.width-control {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 7px;
  color: var(--muted);
  font-size: 12px;
}

.width-control input { width: 130px; accent-color: var(--accent); }
.quality-label { min-width: 54px; color: var(--muted); font-size: 12px; }

.reader-layout {
  min-height: 0;
  flex: 1;
  display: flex;
}

.toc-pane {
  width: 290px;
  min-width: 240px;
  display: flex;
  flex-direction: column;
  border-right: 1px solid var(--line);
  background: var(--panel);
}

.toc-pane.collapsed { display: none; }

.toc-head {
  flex: 0 0 auto;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  padding: 14px 12px 10px;
  border-bottom: 1px solid var(--line);
}

.toc-meta { margin-top: 4px; color: var(--muted); font-size: 12px; }
.icon-btn { width: 28px; height: 28px; }

.chapter-list {
  min-height: 0;
  flex: 1;
  overflow: auto;
  padding: 7px;
}

.chapter-item {
  width: 100%;
  min-height: 39px;
  display: block;
  padding: 8px 10px;
  overflow: hidden;
  border: 0;
  border-radius: 7px;
  color: var(--text);
  background: transparent;
  text-align: left;
  text-overflow: ellipsis;
  white-space: nowrap;
  cursor: pointer;
}

.chapter-item:hover { background: var(--hover); }
.chapter-item.active { color: var(--accent); background: color-mix(in srgb, var(--accent) 14%, transparent); }
.chapter-item.loading::after { content: " · 加载中"; color: var(--muted); font-size: 11px; }

.load-more {
  min-height: 36px;
  margin: 8px;
  flex: 0 0 auto;
}

.page-scroller {
  min-width: 0;
  flex: 1;
  overflow: auto;
  overflow-anchor: none;
  overscroll-behavior: contain;
  background: var(--bg);
}

.reader-status {
  max-width: 720px;
  margin: 28px auto;
  padding: 16px;
  color: var(--muted);
  text-align: center;
}

.reader-status.error { color: #e36b66; }

.page-stack {
  width: min(var(--manga-page-width, 900px), 100%);
  margin: 0 auto;
  background: #0b0c0f;
}

.manga-page {
  position: relative;
  width: 100%;
  min-height: 260px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  color: #8f98a6;
  background: #11141a;
  border-bottom: 1px solid #252a33;
}

.manga-page::before {
  content: attr(data-placeholder);
  padding: 30px;
  text-align: center;
}

.manga-page.loaded { min-height: 0; }
.manga-page.loaded::before { display: none; }
.manga-page.error { min-height: 160px; color: #e36b66; cursor: pointer; }

.manga-page img {
  display: block;
  width: 100%;
  height: auto;
}

.chapter-end {
  min-width: 220px;
  min-height: 42px;
  display: block;
  margin: 24px auto 44px;
  padding: 0 24px;
}

@media (max-width: 850px) {
  .width-control { display: none; }
  .quality-label { display: none; }
  .toc-pane {
    position: absolute;
    z-index: 5;
    top: 92px;
    bottom: 0;
    box-shadow: 8px 0 24px rgba(0, 0, 0, 0.28);
  }
}