:root {
  color-scheme: light;
  --bg: #f5f1e8;
  --paper: #fffdf8;
  --ink: #171717;
  --muted: #6a6258;
  --line: #d9d1c3;
  --accent: #c93d2c;
  --accent-2: #0d766e;
  --nav: #20242a;
  --shadow: 0 12px 28px rgba(18, 17, 15, 0.14);
  --image-width: 960px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Microsoft YaHei", "Segoe UI", Arial, sans-serif;
  -webkit-tap-highlight-color: transparent;
}

button,
select,
a {
  font: inherit;
}

.app-shell {
  min-height: 100vh;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 18px;
  background: rgba(255, 253, 248, 0.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
  color: inherit;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  color: #fff;
  background: var(--nav);
  border: 2px solid #101215;
  border-radius: 8px;
  font-weight: 900;
  box-shadow: inset 0 0 0 2px rgba(255, 255, 255, 0.08);
}

.brand strong {
  display: block;
  font-size: 20px;
  line-height: 1.1;
}

.brand small {
  display: block;
  margin-top: 3px;
  color: var(--muted);
  font-size: 12px;
}

.top-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.segmented {
  display: inline-flex;
  padding: 3px;
  background: #ece4d6;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.segmented button,
.pdf-link,
.mode-btn,
.icon-btn {
  min-height: 38px;
  border: 1px solid transparent;
  border-radius: 7px;
  cursor: pointer;
}

.segmented button {
  padding: 0 14px;
  color: var(--muted);
  background: transparent;
}

.segmented button.active {
  color: #fff;
  background: var(--accent);
}

.pdf-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 14px;
  color: #fff;
  background: var(--accent-2);
  font-weight: 800;
  text-decoration: none;
}

.reader-layout {
  display: grid;
  grid-template-columns: 288px minmax(0, 1fr);
  gap: 18px;
  padding: 18px;
}

.chapter-panel {
  position: sticky;
  top: 78px;
  align-self: start;
  max-height: calc(100vh - 96px);
  overflow: auto;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 14px 10px;
  color: var(--muted);
  font-weight: 800;
}

.chapter-list {
  display: grid;
  gap: 8px;
  padding: 0 10px 12px;
}

.chapter-button {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr);
  gap: 10px;
  width: 100%;
  padding: 8px;
  text-align: left;
  background: #fffaf0;
  border: 1px solid transparent;
  border-radius: 8px;
  cursor: pointer;
}

.chapter-button.active {
  background: #fff;
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(201, 61, 44, 0.12);
}

.chapter-button img {
  width: 64px;
  height: 86px;
  object-fit: cover;
  object-position: top center;
  background: #ddd;
  border: 1px solid var(--line);
  border-radius: 6px;
}

.chapter-button strong {
  display: block;
  margin-bottom: 5px;
  overflow: hidden;
  color: var(--ink);
  font-size: 14px;
  line-height: 1.25;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.chapter-button span {
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
}

.reader {
  min-width: 0;
}

.reader-toolbar {
  position: sticky;
  top: 67px;
  z-index: 15;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px;
  margin-bottom: 14px;
  overflow-x: auto;
  background: rgba(245, 241, 232, 0.94);
  border: 1px solid var(--line);
  border-radius: 8px;
  backdrop-filter: blur(12px);
}

.icon-btn,
.mode-btn {
  flex: 0 0 auto;
  min-width: 40px;
  padding: 0 11px;
  color: var(--ink);
  background: #fffdf8;
  border-color: var(--line);
  font-weight: 900;
}

.icon-btn:disabled {
  cursor: default;
  opacity: 0.35;
}

.mode-btn.active {
  color: #fff;
  background: var(--nav);
  border-color: var(--nav);
}

.episode-picker {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 230px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
}

.episode-picker select {
  width: 100%;
  min-height: 38px;
  padding: 0 34px 0 10px;
  color: var(--ink);
  background: #fffdf8;
  border: 1px solid var(--line);
  border-radius: 7px;
}

.zoom-label {
  min-width: 52px;
  color: var(--muted);
  text-align: center;
  font-size: 13px;
  font-weight: 900;
}

.page-frame {
  display: grid;
  gap: 12px;
  min-width: 0;
  user-select: none;
  -webkit-user-select: none;
}

.page-meta {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 14px;
  max-width: 980px;
  margin: 0 auto;
  width: 100%;
}

.page-meta span {
  color: var(--accent);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0;
}

.page-meta h1 {
  margin: 0;
  font-size: 26px;
  line-height: 1.15;
  text-align: right;
}

.image-scroller {
  width: 100%;
  overflow: auto;
  text-align: center;
}

#comicImage {
  display: block;
  width: min(100%, var(--image-width));
  max-width: none;
  height: auto;
  margin: 0 auto 40px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
  pointer-events: auto;
  -webkit-touch-callout: none;
  -webkit-user-drag: none;
  user-select: none;
  -webkit-user-select: none;
}

.chapter-button img {
  -webkit-touch-callout: none;
  -webkit-user-drag: none;
  user-select: none;
  -webkit-user-select: none;
}

@media (max-width: 900px) {
  .topbar {
    align-items: stretch;
    flex-direction: column;
  }

  .top-actions {
    justify-content: space-between;
  }

  .reader-layout {
    display: block;
    padding: 12px;
  }

  .chapter-panel {
    position: static;
    max-height: none;
    margin-bottom: 12px;
  }

  .chapter-list {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    padding-bottom: 12px;
  }

  .chapter-button {
    flex: 0 0 190px;
  }

  .reader-toolbar {
    top: 111px;
  }
}

@media (max-width: 560px) {
  .brand strong {
    font-size: 18px;
  }

  .reader-toolbar {
    top: 109px;
    gap: 6px;
  }

  .episode-picker {
    min-width: 170px;
  }

  .page-meta {
    align-items: start;
    flex-direction: column;
    gap: 4px;
  }

  .page-meta h1 {
    font-size: 22px;
    text-align: left;
  }
}