:root {
  --pink: #e87ea6;
  --pink-soft: #fbe4ee;
  --blue: #5b8def;
  --blue-soft: #e1ecfd;
  --ink: #2c2a28;
  --paper: #fbf8f3;
  --paper2: #f3eee5;
  --muted: #9a948c;
  --line: #e7e0d5;
}
* { box-sizing: border-box; }
html, body {
  margin: 0; padding: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Noto Serif SC", "Songti SC", Georgia, "Microsoft YaHei", serif;
  -webkit-font-smoothing: antialiased;
}
button { font-family: inherit; cursor: pointer; }
a { color: var(--blue); }

/* ---------- 登录 ---------- */
.center-wrap {
  min-height: 100vh; display: flex; align-items: center; justify-content: center;
}
.card {
  background: #fff; border: 1px solid var(--line); border-radius: 16px;
  padding: 32px; width: 320px; box-shadow: 0 8px 30px rgba(0,0,0,.05);
}
.card h1 { font-size: 22px; margin: 0 0 4px; }
.card p.sub { color: var(--muted); margin: 0 0 20px; font-size: 13px; }
.field { margin-bottom: 14px; }
.field label { display: block; font-size: 13px; color: var(--muted); margin-bottom: 6px; }
.field input {
  width: 100%; padding: 10px 12px; border: 1px solid var(--line);
  border-radius: 10px; font-size: 15px; background: var(--paper);
}
.btn {
  width: 100%; padding: 11px; border: none; border-radius: 10px;
  background: var(--ink); color: #fff; font-size: 15px;
}
.btn:hover { opacity: .9; }
.btn.pink { background: var(--pink); }
.err { color: #c0392b; font-size: 13px; min-height: 18px; margin-top: 8px; }

/* ---------- 书库 ---------- */
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 24px; border-bottom: 1px solid var(--line); background: #fff;
}
.topbar .brand { font-size: 18px; font-weight: 600; }
.topbar .who { font-size: 13px; color: var(--muted); }
.topbar .who .dot { display:inline-block; width:9px; height:9px; border-radius:50%; margin-right:5px; vertical-align: middle; }
.container { max-width: 880px; margin: 0 auto; padding: 24px; }
.lib-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; }
.lib-head h2 { margin: 0; font-size: 20px; }
.shelf { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px,1fr)); gap: 16px; }
.book {
  background: #fff; border: 1px solid var(--line); border-radius: 12px;
  padding: 16px; cursor: pointer; position: relative; transition: transform .1s;
}
.book:hover { transform: translateY(-2px); box-shadow: 0 6px 18px rgba(0,0,0,.06); }
.book .title { font-weight: 600; font-size: 15px; line-height: 1.4; }
.book .meta { color: var(--muted); font-size: 12px; margin-top: 8px; }
.book .del {
  position: absolute; top: 8px; right: 8px; border: none; background: none;
  color: var(--muted); font-size: 16px; display: none;
}
.book:hover .del { display: block; }
.empty { color: var(--muted); text-align: center; padding: 60px 0; }

/* ---------- 阅读页 ---------- */
.reader-top {
  display: flex; align-items: center; gap: 12px;
  padding: 10px 16px; border-bottom: 1px solid var(--line);
  background: #fff; position: sticky; top: 0; z-index: 20;
}
.reader-top .back { border: none; background: none; font-size: 18px; }
.reader-top .ch-title { font-size: 14px; color: var(--muted); flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.reader-top .toc-btn { border: 1px solid var(--line); background: var(--paper); border-radius: 8px; padding: 6px 10px; font-size: 13px; }

.page-wrap { max-width: 720px; margin: 0 auto; padding: 32px 24px 120px; }
.page-text { font-size: 18px; line-height: 2; white-space: pre-wrap; word-break: break-word; }
.page-text p { margin: 0 0 1em; }

mark.hl { background: transparent; border-bottom: 2px solid; padding-bottom: 1px; cursor: pointer; }
mark.hl.pink { border-color: var(--pink); }
mark.hl.blue { border-color: var(--blue); }
.bubble-dot {
  display: inline-block; width: 16px; height: 16px; border-radius: 50%;
  margin: 0 2px; vertical-align: super; font-size: 0; cursor: pointer;
  border: 2px solid #fff; box-shadow: 0 1px 3px rgba(0,0,0,.2);
}
.bubble-dot.pink { background: var(--pink); }
.bubble-dot.blue { background: var(--blue); }

.pager { display: flex; justify-content: space-between; align-items: center; margin-top: 40px; color: var(--muted); font-size: 14px; }
.pager button { border: 1px solid var(--line); background: #fff; border-radius: 10px; padding: 8px 18px; font-size: 14px; }
.pager button:disabled { opacity: .4; cursor: default; }

/* 选中浮动按钮 */
#selbar {
  position: absolute; z-index: 50; display: none;
  background: var(--ink); border-radius: 10px; padding: 4px; gap: 4px;
  box-shadow: 0 6px 20px rgba(0,0,0,.25);
}
#selbar.show { display: flex; }
#selbar button { background: none; border: none; color: #fff; padding: 7px 12px; font-size: 14px; border-radius: 6px; }
#selbar button:hover { background: rgba(255,255,255,.15); }

/* 气泡弹层 */
.popover {
  position: absolute; z-index: 60; max-width: 280px;
  background: #fff; border-radius: 12px; padding: 12px 14px;
  box-shadow: 0 10px 30px rgba(0,0,0,.18); border: 1px solid var(--line);
  font-size: 14px; line-height: 1.6;
}
.popover .who { font-size: 12px; font-weight: 600; margin-bottom: 6px; }
.popover.pink .who { color: var(--pink); }
.popover.blue .who { color: var(--blue); }
.popover .anchor { color: var(--muted); font-size: 12px; border-left: 3px solid var(--line); padding-left: 8px; margin-bottom: 6px; }
.popover .del-ann { border: none; background: none; color: var(--muted); font-size: 12px; margin-top: 8px; padding: 0; }

/* 写想法输入框 */
#note-modal { position: fixed; inset: 0; background: rgba(0,0,0,.3); display: none; align-items: center; justify-content: center; z-index: 80; }
#note-modal.show { display: flex; }
#note-modal .box { background: #fff; border-radius: 14px; padding: 20px; width: 340px; }
#note-modal .anchor-q { color: var(--muted); font-size: 13px; border-left: 3px solid var(--pink); padding-left: 8px; margin-bottom: 12px; max-height: 80px; overflow: auto; }
#note-modal textarea { width: 100%; height: 90px; border: 1px solid var(--line); border-radius: 10px; padding: 10px; font-family: inherit; font-size: 14px; resize: none; }
#note-modal .row { display: flex; gap: 10px; margin-top: 12px; }
#note-modal .row button { flex: 1; padding: 10px; border-radius: 10px; border: none; font-size: 14px; }
#note-modal .row .cancel { background: var(--paper2); }
#note-modal .row .ok { background: var(--pink); color: #fff; }

/* ---------- 聊天面板 ---------- */
.chat-toggle {
  position: fixed; right: 20px; bottom: 20px; z-index: 70;
  width: 54px; height: 54px; border-radius: 50%; border: none;
  background: var(--ink); color: #fff; font-size: 22px;
  box-shadow: 0 6px 20px rgba(0,0,0,.25);
}
.chat-panel {
  position: fixed; right: 0; top: 0; bottom: 0; width: 380px; max-width: 92vw;
  background: #fff; border-left: 1px solid var(--line); z-index: 75;
  transform: translateX(100%); transition: transform .25s; display: flex; flex-direction: column;
}
.chat-panel.open { transform: translateX(0); }
.chat-head { padding: 14px 16px; border-bottom: 1px solid var(--line); display: flex; justify-content: space-between; align-items: center; }
.chat-head .t { font-weight: 600; }
.chat-head .x { border: none; background: none; font-size: 20px; color: var(--muted); }
.chat-body { flex: 1; overflow-y: auto; padding: 16px; display: flex; flex-direction: column; gap: 12px; }
.msg { max-width: 80%; padding: 9px 13px; border-radius: 14px; font-size: 14px; line-height: 1.6; white-space: pre-wrap; word-break: break-word; }
.msg.me { align-self: flex-end; background: var(--blue-soft); }
.msg.them { align-self: flex-start; background: var(--pink-soft); }
.msg.ai { align-self: flex-start; background: var(--paper2); }
.msg .name { font-size: 11px; color: var(--muted); margin-bottom: 3px; }
.chat-foot { border-top: 1px solid var(--line); padding: 10px; display: flex; gap: 8px; }
.chat-foot textarea { flex: 1; border: 1px solid var(--line); border-radius: 12px; padding: 9px 12px; font-family: inherit; font-size: 14px; height: 40px; resize: none; }
.chat-foot button { border: none; background: var(--ink); color: #fff; border-radius: 12px; padding: 0 16px; }
.reading-hint { font-size: 12px; color: var(--muted); padding: 0 16px 8px; }
.typing { align-self: flex-start; color: var(--muted); font-size: 13px; }

/* TOC 抽屉 */
#toc-drawer { position: fixed; inset: 0; background: rgba(0,0,0,.3); display: none; z-index: 90; }
#toc-drawer.show { display: block; }
#toc-drawer .panel { position: absolute; left: 0; top: 0; bottom: 0; width: 300px; max-width: 85vw; background: #fff; overflow-y: auto; padding: 16px; }
#toc-drawer .panel h3 { margin: 0 0 12px; }
#toc-drawer .ch { padding: 10px 8px; border-radius: 8px; cursor: pointer; font-size: 14px; }
#toc-drawer .ch:hover { background: var(--paper2); }
#toc-drawer .ch.active { background: var(--paper2); font-weight: 600; }

.hidden { display: none !important; }