* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; width: 100%; height: 100%; }
body {
  background: radial-gradient(circle at top, #233b67 0%, #15284b 40%, #0f1f3b 100%);
  color: #eef2ff;
  font-family: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', sans-serif;
}

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

.reader-topbar {
  min-height: 64px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 12px;
  padding: 10px 16px;
  background: rgba(8, 19, 41, .86);
  border-bottom: 1px solid rgba(255, 255, 255, .12);
  backdrop-filter: blur(10px);
}

.reader-topbar .back {
  color: #dbeafe;
  font-size: 14px;
  padding: 8px 10px;
  border-radius: 8px;
}
.reader-topbar .back:hover { background: rgba(255,255,255,.1); }

.reader-title-wrap { min-width: 0; }
.reader-title-wrap h1 {
  margin: 0;
  font-size: 18px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.reader-submeta {
  margin: 4px 0 0;
  font-size: 12px;
  color: #c5d3ef;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.top-actions { display: flex; gap: 8px; }
.top-actions button {
  border: 1px solid rgba(255,255,255,.18);
  background: rgba(255,255,255,.08);
  color: #fff;
  border-radius: 8px;
  padding: 8px 10px;
  cursor: pointer;
}
.top-actions button:hover { background: rgba(255,255,255,.16); }

.reader-main {
  flex: 1;
  display: grid;
  grid-template-columns: 240px 60px 1fr 60px;
  align-items: stretch;
}

.outline-panel {
  border-right: 1px solid rgba(255, 255, 255, .12);
  background: rgba(8, 17, 34, .62);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: width .25s ease, opacity .25s ease;
}
.outline-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 10px 12px;
  border-bottom: 1px solid rgba(255,255,255,.1);
}
.outline-head button {
  border: 0;
  background: rgba(255,255,255,.14);
  color: #fff;
  border-radius: 6px;
  padding: 4px 8px;
  cursor: pointer;
}

.outline-list {
  padding: 8px;
  overflow-y: auto;
  display: grid;
  gap: 6px;
}
.outline-item {
  width: 100%;
  border: 0;
  border-radius: 8px;
  text-align: left;
  padding: 8px 10px;
  color: #dbeafe;
  background: rgba(255,255,255,.06);
  cursor: pointer;
}
.outline-item.active {
  background: rgba(58, 107, 201, .46);
  outline: 1px solid rgba(125, 167, 245, .85);
}

.reader-shell.outline-collapsed .reader-main { grid-template-columns: 0 60px 1fr 60px; }
.reader-shell.outline-collapsed .outline-panel { width: 0; opacity: 0; border-right: 0; }

.nav {
  width: 42px;
  height: 42px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,.22);
  margin: auto;
  font-size: 26px;
  line-height: 1;
  background: rgba(255,255,255,.1);
  color: #fff;
  cursor: pointer;
}
.nav:hover { background: rgba(255,255,255,.18); }

.book-frame-wrap { width: min(1240px, 92vw); margin: 16px auto; }
.book-frame {
  position: relative;
  width: 100%;
  height: min(70vh, 760px);
  display: grid;
  grid-template-columns: 1fr 1fr;
  background: #0f172a;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 24px 58px rgba(0,0,0,.45);
  transform-origin: center center;
}
.book-spine {
  position: absolute;
  left: 50%;
  top: 0;
  width: 2px;
  height: 100%;
  background: rgba(255,255,255,.16);
  z-index: 2;
}
.page { position: relative; overflow: hidden; background: #fff; }
.page img { width: 100%; height: 100%; object-fit: contain; transition: filter .25s ease; }
.page img.reader-image.loading { filter: blur(4px) saturate(.9); }
.page-right { border-left: 1px solid rgba(0,0,0,.1); }

.page-watermark {
  position: absolute;
  left: 12px;
  bottom: 12px;
  max-width: 90%;
  padding: 4px 8px;
  border-radius: 6px;
  font-size: 12px;
  color: rgba(255,255,255,.88);
  background: rgba(0,0,0,.3);
  pointer-events: none;
  z-index: 5;
}

.thumb-strip {
  margin-top: 12px;
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: 56px;
  gap: 8px;
  overflow-x: auto;
  padding: 6px 2px;
}
.thumb-item {
  width: 56px;
  height: 74px;
  border: 2px solid transparent;
  border-radius: 6px;
  overflow: hidden;
  background: #111827;
  cursor: pointer;
}
.thumb-item.active { border-color: #7da7f5; box-shadow: 0 0 0 2px rgba(125,167,245,.2); }
.thumb-item img { width: 100%; height: 100%; object-fit: cover; display: block; }

.reader-footer {
  min-height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 8px 16px 12px;
}
.pager { display: flex; align-items: center; gap: 10px; }
.pager button, .jump-box button {
  border: 1px solid rgba(255,255,255,.22);
  background: rgba(255,255,255,.1);
  color: #fff;
  border-radius: 8px;
  padding: 8px 12px;
}
.pager button:hover, .jump-box button:hover { background: rgba(255,255,255,.18); }
.jump-box { display: flex; align-items: center; gap: 8px; }
.jump-box input {
  width: 90px;
  padding: 8px 10px;
  border-radius: 8px;
  border: 1px solid rgba(255,255,255,.25);
  background: rgba(0,0,0,.22);
  color: #fff;
}

@media (max-width: 980px) {
  .reader-topbar { grid-template-columns: 1fr; align-items: flex-start; }
  .top-actions { flex-wrap: wrap; }
}

@media (max-width: 768px) {
  .reader-main { grid-template-columns: 1fr; padding: 8px 0; }
  .outline-panel { display: none; }
  .reader-shell.outline-collapsed .reader-main { grid-template-columns: 1fr; }
  .nav { display: none; }
  .book-frame-wrap { width: 96vw; }
  .book-frame {
    height: calc(100vh - 280px);
    grid-template-columns: 1fr;
  }
  .book-spine, .page-right { display: none; }
  .reader-footer { flex-direction: column; align-items: stretch; }
  .pager, .jump-box { justify-content: center; }
}