:root {
  color-scheme: light;
  font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: #f8fafc;
  color: #111827;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
}

button,
input,
textarea {
  font: inherit;
}

.shell {
  min-height: 100vh;
  background: #f8fafc;
}

.bar {
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 0 16px;
  border-bottom: 1px solid #e5e7eb;
  background: #ffffff;
}

.bar h1 {
  margin: 0;
  font-size: 18px;
}

.bar-spacer {
  width: 40px;
}

.icon-btn {
  width: 40px;
  height: 40px;
  border: 0;
  border-radius: 8px;
  background: transparent;
  cursor: pointer;
}

.icon-btn:hover {
  background: #f3f4f6;
}

.list {
  width: min(760px, 100%);
  margin: 0 auto;
  padding: 16px;
  display: grid;
  gap: 12px;
}

.continue {
  width: min(760px, calc(100% - 32px));
  min-height: 128px;
  margin: 16px auto 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px;
  border: 1px solid #d6d3d1;
  border-radius: 8px;
  background: #fffaf0;
}

.continue h2 {
  margin: 4px 0 6px;
  font-size: 22px;
}

.continue p {
  margin: 0;
  color: #57534e;
}

.eyebrow {
  color: #78716c;
  font-size: 13px;
  font-weight: 700;
}

.primary-action {
  min-width: 88px;
  height: 42px;
  border: 0;
  border-radius: 8px;
  background: #111827;
  color: #ffffff;
  font-weight: 700;
  cursor: pointer;
}

.book {
  min-height: 112px;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 12px;
  padding: 16px;
  border: 1px solid #e5e7eb;
  border-radius: 8px;
  background: #ffffff;
  text-align: left;
  cursor: pointer;
}

.book h2 {
  margin: 0 0 6px;
  font-size: 20px;
}

.book p {
  margin: 0;
  color: #374151;
  line-height: 1.5;
}

.meta {
  margin-bottom: 8px;
  color: #6b7280;
  font-size: 14px;
}

.reader {
  min-height: 100vh;
  display: grid;
  grid-template-rows: 56px 3px 1fr;
  background: #fbfaf7;
}

.progress-track {
  width: 100%;
  height: 3px;
  background: #e7e5e4;
}

.progress-track span {
  display: block;
  height: 100%;
  background: #111827;
}

.page {
  position: relative;
  display: grid;
  align-items: center;
  min-height: calc(100vh - 56px);
  padding: 54px 28px 88px;
}

.reader-progress {
  position: absolute;
  top: 22px;
  left: 50%;
  transform: translateX(-50%);
  color: #78716c;
  font-size: 13px;
  font-weight: 700;
  z-index: 3;
}

.page-text {
  max-width: 760px;
  margin: 0 auto;
  font-size: 24px;
  line-height: 1.65;
  white-space: pre-wrap;
}

.tap {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 50%;
  border: 0;
  background: transparent;
  cursor: pointer;
}

.tap-left {
  left: 0;
}

.tap-right {
  right: 0;
}

.finish-panel {
  position: fixed;
  left: 50%;
  bottom: 24px;
  transform: translateX(-50%);
  width: min(420px, calc(100% - 32px));
  display: grid;
  gap: 10px;
  justify-items: center;
  padding: 14px;
  border-radius: 8px;
  border: 1px solid #e7e5e4;
  background: rgba(255, 250, 247, 0.94);
  z-index: 4;
}

.finish-state {
  color: #78716c;
  font-size: 14px;
  font-weight: 700;
}

.finish-action {
  width: 100%;
  min-height: 42px;
  border: 0;
  border-radius: 8px;
  background: #111827;
  color: #ffffff;
  font-weight: 700;
  cursor: pointer;
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 78px;
  transform: translateX(-50%);
  min-height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 14px;
  border-radius: 8px;
  background: rgba(17, 24, 39, 0.9);
  color: #ffffff;
  font-size: 14px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 160ms ease;
  z-index: 5;
}

.toast.visible {
  opacity: 1;
}

.form {
  width: min(760px, 100%);
  margin: 0 auto;
  padding: 16px;
  display: grid;
  gap: 16px;
}

.login-panel {
  width: min(420px, calc(100% - 32px));
  margin: 42px auto 0;
  display: grid;
  gap: 16px;
  padding: 18px;
  border: 1px solid #e5e7eb;
  border-radius: 8px;
  background: #ffffff;
}

.manager {
  width: min(1080px, 100%);
  margin: 0 auto;
  padding: 16px;
  display: grid;
  grid-template-columns: 320px 1fr;
  align-items: start;
  gap: 16px;
}

.manager .form {
  width: 100%;
  padding: 0;
}

.library-panel {
  border: 1px solid #e5e7eb;
  border-radius: 8px;
  background: #ffffff;
  overflow: hidden;
}

.panel-title {
  min-height: 52px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 14px;
  border-bottom: 1px solid #e5e7eb;
}

.panel-title h2 {
  margin: 0;
  font-size: 16px;
}

.panel-title span {
  color: #6b7280;
  font-size: 13px;
}

.admin-list {
  display: grid;
}

.admin-book {
  display: grid;
  gap: 12px;
  padding: 14px;
  border-bottom: 1px solid #f3f4f6;
}

.admin-book:last-child {
  border-bottom: 0;
}

.admin-book h3 {
  margin: 0 0 4px;
  font-size: 16px;
}

.admin-book p {
  margin: 0;
  color: #6b7280;
  font-size: 13px;
}

.row-actions {
  display: flex;
  gap: 8px;
}

.small-btn {
  min-height: 34px;
  flex: 1;
  border: 1px solid #d1d5db;
  border-radius: 8px;
  background: #ffffff;
  color: #111827;
  cursor: pointer;
}

.small-btn:hover {
  background: #f9fafb;
}

.small-btn.danger {
  border-color: #fecaca;
  color: #991b1b;
}

.field {
  display: grid;
  gap: 8px;
}

.label-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

label {
  font-weight: 700;
  font-size: 14px;
}

input,
textarea {
  width: 100%;
  border: 1px solid #d1d5db;
  border-radius: 8px;
  background: #ffffff;
  padding: 10px 12px;
  color: #111827;
  outline: none;
}

textarea {
  min-height: 320px;
  line-height: 1.55;
  resize: vertical;
}

.save {
  height: 48px;
  border: 0;
  border-radius: 8px;
  background: #111827;
  color: #ffffff;
  font-weight: 700;
  cursor: pointer;
}

.secondary-action {
  height: 46px;
  border: 1px solid #d1d5db;
  border-radius: 8px;
  background: #ffffff;
  color: #111827;
  font-weight: 700;
  cursor: pointer;
}

.secondary-action:hover {
  background: #f9fafb;
}

.message {
  color: #166534;
}

.message.error {
  color: #991b1b;
}

.empty {
  padding: 48px 16px;
  text-align: center;
  color: #6b7280;
}

.empty.compact {
  padding: 18px 14px;
  text-align: left;
}

@media (max-width: 780px) {
  .manager {
    grid-template-columns: 1fr;
  }
}