/* ============ 科研阅读工作台 · 低饱和暖纸配色 ============ */
:root {
  --bg: #F4F2ED;
  --panel: #FAF9F5;
  --card: #FFFFFF;
  --reader-bg: #E9E6DF;
  --border: #E4DFD4;
  --border-soft: #ECE8DF;
  --ink: #3A3730;
  --ink-2: #837D71;
  --ink-3: #ABA696;
  --accent: #7B9484;
  --accent-deep: #5F7A6B;
  --accent-soft: #E9EFEA;
  --accent-ghost: #F1F5F1;
  --danger: #A5604A;
  --danger-soft: #F6EAE4;
  --gold-soft: #F2EADB;
  --radius: 10px;
  --radius-sm: 7px;
  --shadow-pop: 0 2px 6px rgba(70, 63, 50, .06), 0 12px 32px rgba(70, 63, 50, .12);
  --shadow-soft: 0 1px 2px rgba(70, 63, 50, .05), 0 4px 14px rgba(70, 63, 50, .06);
  --font-ui: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-serif: Georgia, "Times New Roman", "Songti SC", "STSong", "SimSun", serif;
  --ease: cubic-bezier(.33, 1, .68, 1);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }
body {
  font-family: var(--font-ui);
  background: var(--bg);
  color: var(--ink);
  font-size: 14px;
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
}
button { font-family: inherit; font-size: inherit; color: inherit; background: none; border: none; cursor: pointer; }
input, textarea, select { font-family: inherit; font-size: inherit; color: var(--ink); }
::selection { background: rgba(123, 148, 132, .30); }
.ic { flex: none; display: inline-block; vertical-align: -3px; }
.spin { animation: spin 1s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-thumb { background: #D4CFC2; border-radius: 6px; border: 2px solid transparent; background-clip: content-box; }
::-webkit-scrollbar-thumb:hover { background: #C2BCAB; background-clip: content-box; border: 2px solid transparent; }
::-webkit-scrollbar-track { background: transparent; }

#app { display: flex; height: 100vh; }

/* ============ 侧栏 ============ */
#sidebar {
  width: 288px; flex: none; display: flex; flex-direction: column;
  background: var(--panel); border-right: 1px solid var(--border);
  padding: 18px 14px 12px;
}
.sb-brand { display: flex; align-items: center; gap: 9px; padding: 0 6px 14px; }
.brand-mark { color: var(--accent-deep); display: flex; }
.brand-name { font-size: 15px; font-weight: 600; letter-spacing: .5px; color: var(--ink); }

.ws-bar {
  display: flex; align-items: center; justify-content: space-between; gap: 8px;
  padding: 9px 12px; border: 1px solid var(--border); border-radius: var(--radius);
  background: var(--card); width: 100%;
  transition: border-color .18s var(--ease), box-shadow .18s var(--ease);
}
.ws-bar:hover { border-color: var(--accent); box-shadow: var(--shadow-soft); }
.ws-name { font-weight: 600; font-size: 13.5px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; text-align: left; }
.ws-switch-ic { color: var(--ink-3); display: flex; }

.sb-tools { padding: 12px 2px 10px; display: flex; flex-direction: column; gap: 8px; }
.sb-search {
  position: relative; display: flex; align-items: center; margin: 10px 2px 0;
  border: 1px solid var(--border); border-radius: 9px; background: var(--card);
  transition: border-color .16s, box-shadow .16s;
}
.sb-search:focus-within { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-ghost); }
.sb-search-icon { display: flex; margin-left: 9px; color: var(--ink-3); pointer-events: none; }
.sb-search input {
  width: 100%; min-width: 0; border: 0; outline: 0; background: transparent;
  padding: 8px 30px 8px 7px; color: var(--ink); font-size: 12.5px;
}
.sb-search input::-webkit-search-cancel-button { display: none; }
.sb-search-clear { position: absolute; right: 5px; display: flex; padding: 4px; color: var(--ink-3); border-radius: 5px; }
.sb-search-clear:hover { color: var(--ink); background: var(--bg); }
.seg {
  display: flex; background: var(--accent-ghost); border-radius: var(--radius-sm);
  padding: 3px; border: 1px solid var(--border-soft);
}
.seg button {
  flex: 1; padding: 5px 0; border-radius: 5px; font-size: 12.5px; color: var(--ink-2);
  transition: all .2s var(--ease);
}
.seg button.active { background: var(--card); color: var(--accent-deep); font-weight: 600; box-shadow: 0 1px 3px rgba(70,63,50,.08); }

.btn-add-paper {
  display: flex; align-items: center; justify-content: center; gap: 7px;
  padding: 8px 0; border-radius: var(--radius-sm); font-size: 13px; font-weight: 500;
  background: var(--accent); color: #fff;
  transition: background .18s var(--ease), transform .15s var(--ease);
}
.btn-add-paper:hover { background: var(--accent-deep); }
.btn-add-paper:active { transform: scale(.98); }
.btn-ghost-sm {
  display: flex; align-items: center; justify-content: center; gap: 6px;
  padding: 6px 0; border-radius: var(--radius-sm); font-size: 12.5px; color: var(--ink-2);
  border: 1px dashed var(--border); transition: all .18s var(--ease);
}
.btn-ghost-sm:hover { color: var(--accent-deep); border-color: var(--accent); background: var(--accent-ghost); }

.sb-list { flex: 1; overflow-y: auto; overflow-x: hidden; padding: 4px 2px 10px; }
.search-head { padding: 9px 8px 7px; font-size: 11.5px; color: var(--ink-3); }
.search-result {
  width: 100%; display: block; text-align: left; padding: 9px 8px; margin-bottom: 3px;
  border-radius: 8px; border: 1px solid transparent; transition: background .15s, border-color .15s;
}
.search-result:hover, .search-result:focus-visible { background: var(--accent-ghost); border-color: var(--border-soft); outline: none; }
.search-result-top { display: flex; gap: 6px; align-items: center; min-width: 0; margin-bottom: 4px; }
.search-kind { flex: none; color: var(--accent-deep); font-size: 10.5px; font-weight: 650; }
.search-paper { min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; color: var(--ink-2); font-size: 11px; }
.search-snippet { color: var(--ink); font-size: 12px; line-height: 1.55; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.search-snippet mark { color: inherit; background: rgba(242, 214, 117, .62); border-radius: 2px; padding: 0 1px; }
.search-empty { padding: 28px 10px; text-align: center; color: var(--ink-3); font-size: 12px; }

.sb-section { margin-bottom: 4px; }
.sb-sec-head {
  display: flex; align-items: center; gap: 5px; width: 100%;
  padding: 7px 6px; color: var(--ink-2); font-size: 12px; font-weight: 600; letter-spacing: 1px;
  border-radius: 6px; user-select: none;
}
.sb-sec-head:hover { color: var(--ink); background: var(--accent-ghost); }
.sb-sec-head .ic { transition: transform .22s var(--ease); }
.sb-sec-head.collapsed .ic { transform: rotate(-90deg); }
.sb-sec-count { margin-left: auto; color: var(--ink-3); font-weight: 500; letter-spacing: 0; }
.sb-group-label {
  display: flex; align-items: center; gap: 6px;
  padding: 6px 6px 3px 22px; font-size: 11.5px; color: var(--ink-3); font-weight: 600;
}
.sb-group-label .cnt { margin-left: auto; font-weight: 400; }

.paper-row {
  position: relative; display: flex; align-items: stretch; width: 100%;
  border-radius: var(--radius-sm);
  transition: background .15s var(--ease);
  animation: rowIn .28s var(--ease) both;
}
@keyframes rowIn { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: none; } }
.paper-row:hover { background: var(--accent-ghost); }
.paper-row:focus-within { background: var(--accent-ghost); }
.paper-row.active { background: var(--accent-soft); }
.paper-row.active::before {
  content: ''; position: absolute; left: 0; top: 8px; bottom: 8px; width: 3px;
  border-radius: 3px; background: var(--accent);
}
.paper-row .pr-main {
  flex: 1; min-width: 0; display: block; text-align: left;
  padding: 8px 10px; border-radius: var(--radius-sm);
}
.paper-row:not(:hover):not(:focus-within) .pr-kebab { opacity: 0; }
.paper-row .pr-main:focus-visible,
.paper-row .pr-kebab:focus-visible { outline: 2px solid var(--accent-deep); outline-offset: -2px; border-radius: 6px; }
.pr-title {
  font-family: var(--font-serif); font-size: 13px; line-height: 1.45; color: var(--ink);
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.paper-row.done .pr-title { color: var(--ink-3); }
.pr-meta { display: flex; align-items: center; gap: 6px; margin-top: 5px; font-size: 11px; color: var(--ink-3); }
.pr-chip {
  display: inline-flex; align-items: center; padding: 1px 7px; border-radius: 20px;
  font-size: 10.5px; font-weight: 600; letter-spacing: .3px;
}
.pr-kebab {
  flex: none; align-self: center; margin: 0 6px 0 0;
  width: 26px; height: 26px; border-radius: 7px;
  display: flex; align-items: center; justify-content: center; color: var(--ink-2);
  transition: opacity .12s var(--ease);
}
.pr-kebab:hover { background: var(--border-soft); color: var(--ink); }
.pr-progress { margin-top: 6px; height: 3px; border-radius: 3px; background: var(--border-soft); overflow: hidden; }
.pr-progress i { display: block; height: 100%; background: var(--accent); border-radius: 3px; transition: width .4s var(--ease); }
.pr-prog-label { font-size: 10.5px; color: var(--ink-3); margin-top: 3px; }

/* 等级徽章配色（低饱和） */
.tier-0 { background: #E7EEE9; color: #56766A; }
.tier-1 { background: #E7ECF3; color: #5A708C; }
.tier-2 { background: #F1EADC; color: #8A744E; }
.tier-3 { background: #ECE8F3; color: #6F628A; }
.tier-4 { background: #F2E9E7; color: #92605A; }
.tier-5 { background: #E9EFE7; color: #5E7A48; }
.tier-6 { background: #EAEAE2; color: #6E6C5E; }
.tier-n { background: var(--border-soft); color: var(--ink-2); }
.cat-chip { background: var(--border-soft); color: var(--ink-2); }

/* ============ 主区域 ============ */
#main { flex: 1; min-width: 0; display: flex; flex-direction: column; position: relative; background: var(--bg); }

#home-view { flex: 1; overflow-y: auto; display: flex; }
#home-inner { margin: auto; width: 100%; max-width: 640px; padding: 48px 32px; }
.home-title { font-family: var(--font-serif); font-size: 26px; color: var(--ink); margin-bottom: 6px; }
.home-sub { color: var(--ink-2); font-size: 13px; margin-bottom: 28px; }
.home-stats { display: flex; gap: 12px; margin-bottom: 28px; }
.hstat {
  flex: 1; background: var(--card); border: 1px solid var(--border-soft); border-radius: var(--radius);
  padding: 14px 16px; transition: transform .2s var(--ease), box-shadow .2s var(--ease);
}
.hstat:hover { transform: translateY(-2px); box-shadow: var(--shadow-soft); }
.hstat .num { font-size: 24px; font-weight: 700; font-family: var(--font-serif); color: var(--accent-deep); }
.hstat .lbl { font-size: 12px; color: var(--ink-2); margin-top: 2px; }
.home-drop {
  display: block; width: 100%; font-family: inherit; font-size: inherit;
  border: 1.5px dashed var(--border); border-radius: 14px; background: var(--panel);
  padding: 44px 24px; text-align: center; color: var(--ink-2); cursor: pointer;
  transition: all .22s var(--ease);
}
.home-drop:focus-visible { outline: 2px solid var(--accent-deep); outline-offset: 2px; }
.home-drop:hover, .home-drop.dragover { border-color: var(--accent); background: var(--accent-ghost); color: var(--accent-deep); }
.home-drop .ic { color: var(--accent); }
.home-drop .hd-main { font-size: 14px; margin-top: 12px; color: var(--ink); }
.home-drop .hd-sub { font-size: 12px; margin-top: 5px; color: var(--ink-3); }
.home-recent { margin-top: 28px; }
.home-recent h3 { font-size: 12.5px; color: var(--ink-2); font-weight: 600; letter-spacing: 1px; margin-bottom: 10px; }
.recent-row {
  display: flex; align-items: center; gap: 10px; width: 100%; text-align: left;
  padding: 10px 12px; border-radius: var(--radius-sm); transition: background .15s;
}
.recent-row:hover { background: var(--card); box-shadow: var(--shadow-soft); }
.recent-title { font-family: var(--font-serif); font-size: 13.5px; flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.recent-meta { font-size: 11.5px; color: var(--ink-3); flex: none; }
.home-empty-hint { text-align: center; color: var(--ink-3); font-size: 12.5px; margin-top: 14px; }

/* ============ 阅读器 ============ */
#reader-view { flex: 1; min-height: 0; display: flex; flex-direction: column; }
#reader-toolbar {
  flex: none; height: 52px; display: flex; align-items: center; gap: 6px;
  padding: 0 14px; background: var(--panel); border-bottom: 1px solid var(--border);
  position: relative; z-index: 20; overflow: hidden; white-space: nowrap;
}
.rt-back {
  width: 32px; height: 32px; border-radius: 8px; display: flex; align-items: center; justify-content: center;
  color: var(--ink-2); transition: all .15s var(--ease);
}
.rt-back:hover { background: var(--accent-ghost); color: var(--ink); }
.rt-title-wrap { flex: 1 1 auto; min-width: 48px; max-width: 320px; margin: 0 10px; overflow: hidden; }
.rt-title {
  font-family: var(--font-serif); font-size: 13.5px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.rt-status { font-size: 11px; color: var(--ink-3); margin-top: 1px; display: flex; gap: 8px; white-space: nowrap; }
.rt-center { display: flex; align-items: center; gap: 3px; margin-left: auto; flex: none; }
.rt-right { display: flex; align-items: center; gap: 6px; margin-left: auto; flex: none; }
.rt-divider { width: 1px; height: 20px; background: var(--border); margin: 0 6px; flex: none; }
.ibtn {
  width: 32px; height: 32px; border-radius: 8px; display: inline-flex; align-items: center; justify-content: center;
  color: var(--ink-2); transition: all .15s var(--ease); position: relative;
}
.ibtn:hover { background: var(--accent-ghost); color: var(--ink); }
.ibtn.active { background: var(--accent-soft); color: var(--accent-deep); }
.ibtn:disabled { opacity: .35; cursor: default; }
.ibtn:disabled:hover { background: none; color: var(--ink-2); }
.page-nav { display: flex; align-items: center; gap: 2px; flex: none; }
.page-ind { font-size: 12px; color: var(--ink-2); display: inline-flex; align-items: center; gap: 2px; padding: 0 4px; white-space: nowrap; flex: none; }
.page-ind input {
  width: 34px; text-align: center; border: 1px solid transparent; border-radius: 5px; padding: 2px 0;
  font-size: 12px; background: transparent; color: var(--ink); transition: all .15s;
}
.page-ind input:focus { outline: none; border-color: var(--accent); background: var(--card); }
.zoom-label { font-size: 12px; color: var(--ink-2); min-width: 42px; text-align: center; }
.tool-color-dot {
  position: absolute; right: 4px; bottom: 4px; width: 7px; height: 7px; border-radius: 50%;
  border: 1.5px solid var(--panel); pointer-events: none;
}
.btn-done {
  display: inline-flex; align-items: center; gap: 5px; padding: 6px 12px; border-radius: 20px;
  font-size: 12.5px; font-weight: 600; background: var(--accent); color: #fff;
  transition: all .2s var(--ease); white-space: nowrap; flex: none;
}
.btn-done:hover { background: var(--accent-deep); }
.btn-done.is-done { background: var(--accent-soft); color: var(--accent-deep); cursor: default; }

#reader-scroll {
  flex: 1; overflow-y: auto; overflow-x: auto; background: var(--reader-bg);
  scroll-behavior: auto;
}
#pages-root { padding: 26px 0 60px; display: flex; flex-direction: column; align-items: center; gap: 18px; position: relative; }
.pg {
  position: relative; background: #fff; border-radius: 3px;
  box-shadow: 0 1px 3px rgba(60, 54, 42, .10), 0 6px 22px rgba(60, 54, 42, .08);
  background-position: center; background-origin: content-box;
}
.pg-inner { position: relative; width: 100%; height: 100%; }
.pg canvas.pdf-canvas { position: absolute; left: 0; top: 0; display: block; border-radius: 3px; }
.pg .textLayer {
  position: absolute; inset: 0; overflow: hidden; line-height: 1; text-align: initial;
  text-size-adjust: none; forced-color-adjust: none; transform-origin: 0 0; z-index: 2;
}
.pg .textLayer span, .pg .textLayer br {
  color: transparent; position: absolute; white-space: pre; cursor: text; transform-origin: 0% 0%;
}
.pg .textLayer .endOfContent {
  display: block; position: absolute; left: 0; top: 100%; transform: translateY(-100%);
  width: 100%; height: 1px; z-index: -1;
}
.pg.noselect .textLayer { user-select: none; }
.pg.noselect .textLayer span { cursor: default; }
.pg .hl-layer { position: absolute; inset: 0; z-index: 1; pointer-events: none; }
.hl-box { position: absolute; border-radius: 2px; pointer-events: auto; cursor: pointer; transition: filter .15s; }
.hl-box:hover { filter: brightness(.94); }
.pg .ink-layer { position: absolute; inset: 0; z-index: 3; touch-action: none; }
.pg .ink-layer.draw { cursor: crosshair; }
.pg .ink-layer.erase { cursor: cell; }
.pg .region-mask {
  position: absolute; inset: 0; z-index: 5; cursor: crosshair; touch-action: none; display: none;
}
.pg.region-mode .region-mask { display: block; }
.region-box {
  position: absolute; border: 1.5px solid var(--accent-deep); background: rgba(123, 148, 132, .14);
  border-radius: 3px; z-index: 6; pointer-events: none;
}
.temp-hl {
  position: absolute; z-index: 8; border-radius: 3px; pointer-events: none;
  animation: tempPulse .6s var(--ease) 3; box-shadow: 0 0 0 1px rgba(123,148,132,.6);
}
@keyframes tempPulse { 0%,100% { background: rgba(242, 214, 117, .75); } 50% { background: rgba(242, 214, 117, .35); } }

/* 选中浮条 */
.sel-pop {
  position: fixed; z-index: 600; display: flex; align-items: center; gap: 4px;
  background: var(--card); border: 1px solid var(--border); border-radius: 10px;
  box-shadow: var(--shadow-pop); padding: 5px 7px;
  animation: popIn .18s var(--ease);
}
@keyframes popIn { from { opacity: 0; transform: translateY(4px) scale(.97); } to { opacity: 1; transform: none; } }
.swatch { width: 20px; height: 20px; border-radius: 6px; border: 1px solid rgba(0,0,0,.08); transition: transform .12s; }
.swatch:hover { transform: scale(1.15); }
.sel-act {
  display: flex; align-items: center; gap: 4px; font-size: 12px; color: var(--ink-2);
  padding: 4px 8px; border-radius: 6px;
}
.sel-act:hover { background: var(--accent-ghost); color: var(--ink); }

/* ============ 右侧面板 ============ */
#right-panel {
  width: 400px; flex: none; display: flex; flex-direction: column;
  background: var(--panel); border-left: 1px solid var(--border);
  transition: width .28s var(--ease), opacity .2s;
  overflow: hidden;
}
#app.rp-collapsed #right-panel { width: 0; border-left: none; }
.rp-head {
  flex: none; height: 52px; display: flex; align-items: center; gap: 8px;
  padding: 0 10px 0 6px; border-bottom: 1px solid var(--border);
}
.rp-tabs { display: flex; gap: 2px; flex: 1; min-width: 0; overflow: hidden; }
.rp-tabs button {
  flex: 0 1 auto; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
  padding: 7px 10px; font-size: 13px; color: var(--ink-2); border-radius: 8px; position: relative;
  transition: color .15s;
}
.rp-tabs button:hover { color: var(--ink); }
.rp-tabs button.active { color: var(--accent-deep); font-weight: 600; }
.rp-tabs button.active::after {
  content: ''; position: absolute; left: 10px; right: 10px; bottom: 2px; height: 2.5px;
  border-radius: 2px; background: var(--accent);
}
.rp-actions { display: flex; align-items: center; gap: 2px; }
.model-chip {
  display: flex; align-items: center; gap: 5px; max-width: 150px;
  font-size: 11.5px; color: var(--ink-2); padding: 5px 9px; border-radius: 20px;
  border: 1px solid var(--border); transition: all .15s;
}
.model-chip:hover { border-color: var(--accent); color: var(--accent-deep); }
.model-chip span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.rp-body { flex: 1; min-height: 0; display: flex; }
.rp-tab { flex: 1; display: flex; flex-direction: column; min-width: 0; min-height: 0; }

/* 对话 tab */
.ai-top { flex: none; padding: 12px 14px 0; }
.btn-understand {
  width: 100%; display: flex; align-items: center; justify-content: center; gap: 8px;
  padding: 9px 0; border-radius: var(--radius); font-size: 13px; font-weight: 600;
  background: linear-gradient(135deg, #8AA394, #6F8C7D); color: #fff;
  box-shadow: 0 2px 8px rgba(111, 140, 125, .25);
  transition: all .2s var(--ease);
}
.btn-understand:hover { filter: brightness(1.05); }
.btn-understand:disabled { opacity: .7; cursor: default; }
.btn-understand.ghost { background: var(--card); color: var(--accent-deep); border: 1px solid var(--border); box-shadow: none; }
.ctx-note { font-size: 11px; color: var(--ink-3); text-align: center; margin-top: 7px; }

#chat-list { flex: 1; overflow-y: auto; padding: 14px 14px 8px; display: flex; flex-direction: column; gap: 14px; }
.chat-empty { margin: auto; text-align: center; color: var(--ink-3); font-size: 12.5px; padding: 30px 20px; line-height: 2; }
.msg { animation: msgIn .3s var(--ease); }
@keyframes msgIn { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }
.msg-user { display: flex; flex-direction: column; align-items: flex-end; gap: 4px; }
.msg-user .bubble {
  background: var(--accent-soft); color: var(--ink); border-radius: 12px 12px 3px 12px;
  padding: 9px 12px; max-width: 92%; font-size: 13px; line-height: 1.6; white-space: pre-wrap; word-break: break-word;
}
.msg-user .imgs { display: flex; flex-wrap: wrap; gap: 6px; justify-content: flex-end; }
.msg-user .imgs img, .msg-ai .imgs img, .attach-img {
  height: 72px; border-radius: 8px; border: 1px solid var(--border); object-fit: cover; cursor: pointer;
}
.msg-quote {
  font-size: 12px; color: var(--ink-2); background: var(--card); border-left: 3px solid var(--accent);
  border-radius: 0 8px 8px 0; padding: 6px 10px; max-width: 92%; margin-bottom: 4px;
  line-height: 1.5; display: -webkit-box; -webkit-line-clamp: 4; -webkit-box-orient: vertical; overflow: hidden;
}
.msg-ai .body { font-size: 13px; line-height: 1.75; color: var(--ink); word-break: break-word; }
.msg-ai .body p { margin: 0 0 8px; }
.msg-ai .body p:last-child { margin-bottom: 0; }
.msg-ai .body ul, .msg-ai .body ol { margin: 2px 0 8px; padding-left: 20px; }
.msg-ai .body li { margin: 3px 0; }
.msg-ai .body code {
  background: var(--gold-soft); border-radius: 4px; padding: 1px 5px; font-size: 12px;
  font-family: Consolas, "Courier New", monospace;
}
.msg-ai .body p.ai-opinion {
  background: var(--gold-soft); border-radius: 8px; padding: 8px 10px; margin-left: -10px;
  border-left: 3px solid #C9A86A; color: #6E5E3E;
}
.msg-ai .body .opinion-tag {
  display: inline-block; margin-right: 6px; font-size: 10.5px; font-weight: 700;
  letter-spacing: 1px; color: #6E5E3E;
}
.cite {
  display: inline-flex; align-items: center; gap: 2px; cursor: pointer;
  background: var(--accent-soft); color: var(--accent-deep); border-radius: 5px;
  font-size: 11px; padding: 0 5px; margin: 0 1px; font-weight: 600; vertical-align: 1px;
  transition: all .13s; border: 1px solid transparent; position: relative; top: -1px;
}
.cite:hover { border-color: var(--accent); }
.msg-ai .reasoning { margin-bottom: 8px; }
.msg-ai .reasoning summary {
  cursor: pointer; font-size: 11.5px; color: var(--ink-3); user-select: none; padding: 3px 0;
}
.msg-ai .reasoning .r-body {
  font-size: 12px; color: var(--ink-2); background: var(--card); border-radius: 8px;
  padding: 8px 10px; margin-top: 5px; white-space: pre-wrap; line-height: 1.6; max-height: 200px; overflow-y: auto;
}
.msg-foot {
  display: flex; align-items: center; gap: 10px; margin-top: 6px; font-size: 11px; color: var(--ink-3);
}
.msg-foot .mf-act { display: flex; align-items: center; gap: 3px; cursor: pointer; padding: 2px 5px; border-radius: 5px; }
.msg-foot .mf-act:hover { background: var(--accent-ghost); color: var(--ink); }
.msg-foot .usage { margin-left: auto; }
.msg-error {
  background: var(--danger-soft); color: var(--danger); border-radius: 8px; padding: 8px 11px;
  font-size: 12.5px; line-height: 1.6; display: flex; align-items: flex-start; gap: 7px;
}
.msg-error .retry-btn { margin-left: auto; flex: none; color: var(--danger); font-weight: 600; text-decoration: underline; font-size: 12px; }
.msg-info {
  display: flex; align-items: center; gap: 8px; background: var(--accent-ghost);
  border: 1px solid var(--border-soft); border-radius: 10px; padding: 9px 12px; font-size: 12.5px; color: var(--ink-2);
}
.msg-info .ic { color: var(--accent-deep); }
.msg-info .link { color: var(--accent-deep); font-weight: 600; cursor: pointer; margin-left: auto; }
.msg-info .link:hover { text-decoration: underline; }
.cursor-blink { display: inline-block; width: 7px; height: 14px; background: var(--accent); animation: blink .9s steps(1) infinite; vertical-align: -2px; border-radius: 2px; }
@keyframes blink { 50% { opacity: 0; } }

/* 引用托盘 / 图片托盘 / 输入区 */
.quote-tray, .img-tray { flex: none; padding: 0 14px; }
.tray-item {
  display: flex; align-items: flex-start; gap: 8px; background: var(--card); border: 1px solid var(--border-soft);
  border-radius: 8px; padding: 6px 9px; margin-bottom: 6px; font-size: 12px; color: var(--ink-2);
  animation: popIn .18s var(--ease);
}
.tray-item .t-main { flex: 1; line-height: 1.5; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.tray-item .t-tag { flex: none; font-size: 10.5px; color: var(--accent-deep); background: var(--accent-soft); border-radius: 4px; padding: 1px 5px; font-weight: 600; }
.tray-item .t-x { flex: none; color: var(--ink-3); width: 18px; height: 18px; display: flex; align-items: center; justify-content: center; border-radius: 4px; }
.tray-item .t-x:hover { color: var(--danger); background: var(--danger-soft); }
.img-tray { display: flex; flex-wrap: wrap; gap: 8px; padding: 6px 14px 0; }
.img-tray .img-cell { position: relative; animation: popIn .18s var(--ease); }
.img-tray img { height: 56px; border-radius: 7px; border: 1px solid var(--border); display: block; object-fit: cover; }
.img-tray .t-x {
  position: absolute; top: -6px; right: -6px; width: 17px; height: 17px; border-radius: 50%;
  background: var(--ink); color: #fff; display: flex; align-items: center; justify-content: center;
}

.composer { flex: none; padding: 10px 14px 14px; }
.composer-box {
  border: 1px solid var(--border); border-radius: 12px; background: var(--card);
  transition: border-color .18s, box-shadow .18s;
}
.composer-box:focus-within { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(123, 148, 132, .12); }
#chat-input {
  width: 100%; border: none; outline: none; background: transparent; resize: none;
  padding: 10px 12px 4px; font-size: 13px; line-height: 1.6; max-height: 160px; min-height: 40px;
}
.composer-bar { display: flex; align-items: center; gap: 4px; padding: 4px 8px 7px; }
.send-btn {
  width: 30px; height: 30px; border-radius: 9px; background: var(--accent); color: #fff;
  display: flex; align-items: center; justify-content: center; transition: all .18s var(--ease);
}
.send-btn:hover { background: var(--accent-deep); }
.send-btn:disabled { background: var(--border); cursor: default; }
.composer-hint { font-size: 10.5px; color: var(--ink-3); margin-left: auto; margin-right: 8px; }

/* 卡片 tab */
#tab-card { overflow-y: auto; }
.card-wrap { padding: 14px 14px 30px; }
.card-head { display: flex; align-items: center; gap: 8px; margin-bottom: 14px; flex-wrap: wrap; }
.card-head .ttl { font-size: 12px; color: var(--ink-2); font-weight: 600; letter-spacing: 1px; }
.card-head .acts { margin-left: auto; display: flex; gap: 4px; }
.pcard {
  background: var(--card); border: 1px solid var(--border-soft); border-radius: 14px;
  padding: 22px 20px 18px; box-shadow: var(--shadow-soft);
  animation: cardIn .4s var(--ease);
}
@keyframes cardIn { from { opacity: 0; transform: translateY(10px) scale(.985); } to { opacity: 1; transform: none; } }
.pcard .pc-title {
  font-family: var(--font-serif); font-size: 16px; line-height: 1.65; margin-bottom: 16px;
  padding-bottom: 14px; border-bottom: 1px solid var(--border-soft);
}
.pcard .pc-oneline {
  background: var(--accent-soft); border-left: 3px solid var(--accent); border-radius: 0 10px 10px 0;
  padding: 13px 15px; font-size: 13px; line-height: 1.85; color: var(--accent-deep); font-weight: 500; margin-bottom: 22px;
}
.pcard .sec { margin-bottom: 22px; }
.pcard .sec:last-child { margin-bottom: 4px; }
.pcard .sec-label {
  font-size: 10px; font-weight: 700; letter-spacing: 2px; color: var(--ink-3); margin-bottom: 8px;
  display: flex; align-items: center; gap: 7px;
}
.pcard .sec-label::before {
  content: ''; flex: none; width: 3px; height: 11px; border-radius: 2px; background: var(--accent);
}
.pcard .sec-body { font-size: 12.5px; line-height: 1.9; color: #4C4840; word-break: break-word; }
.pcard .sec-body ul { padding-left: 18px; }
.pcard .sec-body li { margin: 4px 0; line-height: 1.8; }
.pcard .quote-item {
  background: var(--panel); border: 1px solid var(--border-soft); border-left: 3px solid #C9BCA4;
  border-radius: 4px 10px 10px 4px; padding: 11px 13px; margin-bottom: 10px;
}
.pcard .quote-item:last-child { margin-bottom: 0; }
.pcard .quote-item .q-text { font-family: var(--font-serif); font-size: 12.5px; line-height: 1.7; color: var(--ink); }
.pcard .quote-item .q-note { font-size: 11.5px; color: var(--ink-2); margin-top: 6px; line-height: 1.6; }
.pcard .quote-item .q-jump {
  display: inline-flex; align-items: center; gap: 3px; margin-top: 7px; font-size: 11px; font-weight: 600;
  color: var(--accent-deep); cursor: pointer; background: var(--accent-soft); border-radius: 5px; padding: 2px 8px;
}
.pcard .quote-item .q-jump:hover { text-decoration: underline; }
.card-gen { text-align: center; padding: 40px 20px; color: var(--ink-3); font-size: 13px; line-height: 2; }
.card-gen .ic { color: var(--accent); }
.gen-state { text-align: center; padding: 34px 16px; }
.gen-state .gs-title { font-size: 13px; color: var(--ink-2); margin-top: 14px; }
.gen-state .gs-sub { font-size: 11.5px; color: var(--ink-3); margin-top: 6px; }
.shimmer {
  margin-top: 18px; border-radius: 8px; height: 12px;
  background: linear-gradient(90deg, var(--border-soft) 25%, var(--accent-ghost) 50%, var(--border-soft) 75%);
  background-size: 200% 100%; animation: shimmer 1.4s infinite;
}
@keyframes shimmer { to { background-position: -200% 0; } }
.card-edit .field { margin-bottom: 12px; }
.card-edit label { display: block; font-size: 11px; font-weight: 700; letter-spacing: 1px; color: var(--ink-3); margin-bottom: 4px; }
.card-edit textarea, .card-edit input {
  width: 100%; border: 1px solid var(--border); border-radius: 8px; padding: 7px 10px;
  font-size: 12.5px; line-height: 1.6; background: var(--card); resize: vertical; outline: none;
}
.card-edit textarea:focus, .card-edit input:focus { border-color: var(--accent); }
.btn-row { display: flex; gap: 8px; justify-content: flex-end; margin-top: 6px; }
.btn-primary {
  padding: 7px 16px; border-radius: 8px; background: var(--accent); color: #fff; font-size: 12.5px; font-weight: 600;
  transition: background .15s;
}
.btn-primary:hover { background: var(--accent-deep); }
.btn-plain {
  padding: 7px 14px; border-radius: 8px; color: var(--ink-2); font-size: 12.5px; border: 1px solid var(--border);
  transition: all .15s; background: var(--card);
}
.btn-plain:hover { color: var(--ink); border-color: var(--ink-3); }
.btn-danger {
  padding: 7px 14px; border-radius: 8px; color: var(--danger); font-size: 12.5px; font-weight: 600;
  background: var(--danger-soft); transition: all .15s;
}
.btn-danger:hover { background: #EFDACF; }

/* 笔记 tab */
#tab-notes { padding: 0; }
.note-head {
  flex: none; display: flex; align-items: center; padding: 12px 16px 8px; font-size: 11.5px; color: var(--ink-3);
}
.note-head .saved { margin-left: auto; display: flex; align-items: center; gap: 4px; color: var(--accent-deep); }
#note-area {
  flex: 1; width: 100%; border: none; outline: none; resize: none; background: transparent;
  padding: 4px 18px 24px; font-size: 13px; line-height: 1.9; color: var(--ink);
}
.hl-list { padding: 0 16px 8px; }
.hl-list h4 { font-size: 11px; letter-spacing: 1px; color: var(--ink-3); font-weight: 700; margin: 4px 0 8px; }
.hl-item {
  border: 1px solid var(--border-soft); background: var(--card); border-radius: 8px;
  padding: 7px 10px; margin-bottom: 7px;
}
.hl-item .h-text { font-size: 12px; line-height: 1.55; color: var(--ink); display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: cursor; overflow: hidden; cursor: pointer; }
.hl-item .h-meta { display: flex; align-items: center; gap: 6px; margin-top: 5px; font-size: 10.5px; color: var(--ink-3); }
.hl-item .h-meta .h-del { margin-left: auto; cursor: pointer; color: var(--ink-3); width: 20px; height: 20px; display: flex; align-items: center; justify-content: center; border-radius: 5px; }
.hl-item .h-meta .h-del:hover { color: var(--danger); background: var(--danger-soft); }
.color-dot-s { width: 9px; height: 9px; border-radius: 3px; display: inline-block; }

/* ============ 拖放遮罩 ============ */
[hidden] { display: none !important; }
#drop-overlay {
  position: fixed; inset: 0; z-index: 950; background: rgba(244, 242, 237, .88);
  backdrop-filter: blur(4px); display: flex; align-items: center; justify-content: center;
}
.drop-card {
  border: 2px dashed var(--accent); border-radius: 20px; padding: 56px 84px; text-align: center;
  background: var(--card); box-shadow: var(--shadow-pop);
}
.drop-icon { color: var(--accent); }
.drop-text { margin-top: 16px; font-size: 15px; color: var(--ink); font-weight: 500; }

/* ============ 弹层 / 菜单 / 提示 ============ */
#modal-layer {
  position: fixed; inset: 0; z-index: 900; background: rgba(58, 55, 48, .32);
  display: flex; align-items: center; justify-content: center; backdrop-filter: blur(2px);
  animation: fadeIn .2s var(--ease);
}
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
.modal {
  background: var(--panel); border-radius: 16px; box-shadow: var(--shadow-pop);
  width: 480px; max-width: calc(100vw - 48px); max-height: calc(100vh - 80px);
  display: flex; flex-direction: column; animation: modalIn .26s var(--ease);
}
@keyframes modalIn { from { opacity: 0; transform: translateY(14px) scale(.97); } to { opacity: 1; transform: none; } }
.modal.wide { width: 640px; }
.modal-head { display: flex; align-items: center; padding: 16px 20px 12px; }
.modal-head h3 { font-size: 15px; font-weight: 600; }
.modal-head .ibtn { margin-left: auto; }
.modal-body { padding: 4px 20px 8px; overflow-y: auto; font-size: 13px; line-height: 1.7; color: var(--ink-2); }
.modal-body .form-field { margin-bottom: 13px; }
.modal-body label { display: block; font-size: 12px; font-weight: 600; color: var(--ink); margin-bottom: 5px; }
.modal-body input, .modal-body textarea, .modal-body select {
  width: 100%; border: 1px solid var(--border); border-radius: 8px; padding: 8px 11px;
  font-size: 13px; background: var(--card); outline: none; transition: border-color .15s;
}
.modal-body input:focus, .modal-body textarea:focus, .modal-body select:focus { border-color: var(--accent); }
.modal-body .hint { font-size: 11.5px; color: var(--ink-3); margin-top: 4px; line-height: 1.5; }
.modal-body .grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.modal-foot { display: flex; justify-content: flex-end; gap: 9px; padding: 12px 20px 18px; }
.btn-danger-main { background: var(--danger); color: #fff; padding: 7px 16px; border-radius: 8px; font-size: 12.5px; font-weight: 600; }
.btn-danger-main:hover { background: #93503B; }

/* 数据备份与恢复 */
.backup-actions { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 8px; }
.backup-actions button { display: inline-flex; align-items: center; gap: 6px; }
.modal-body .backup-secret { display: flex; align-items: center; gap: 7px; margin: 5px 0 15px; font-weight: 500; }
.backup-secret span { color: var(--danger); font-size: 11px; }
.modal-body .backup-secret input, .modal-body .backup-auto input { width: auto; flex: none; }
.backup-auto {
  display: grid; grid-template-columns: minmax(150px, 1fr) 110px 100px auto; gap: 9px;
  align-items: end; padding: 12px; background: var(--bg); border: 1px solid var(--border-soft); border-radius: 10px;
}
.modal-body .backup-auto label { margin: 0; }
.modal-body .backup-auto label:first-child { display: flex; align-items: center; align-self: center; gap: 7px; }
.modal-body .backup-auto select { margin-top: 4px; }
.backup-warning { margin: 11px 0; padding: 9px 11px; color: #7F5D2B; background: #FFF7E7; border: 1px solid #EBD9B7; border-radius: 8px; line-height: 1.55; }
.backup-list-title { margin: 16px 0 7px; color: var(--ink); font-size: 12.5px; }
.backup-list { border-top: 1px solid var(--border-soft); }
.backup-row { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding: 9px 2px; border-bottom: 1px solid var(--border-soft); }
.backup-row > div:first-child { min-width: 0; display: flex; flex-direction: column; }
.backup-row b { color: var(--ink); font-size: 12px; }
.backup-row span { color: var(--ink-3); font-size: 11px; }
.backup-row > div:last-child { display: flex; gap: 5px; align-items: center; }
.backup-row .btn-ghost-sm { padding: 5px 9px; border-style: solid; }
.backup-row .danger { color: var(--danger); }
.backup-empty { padding: 18px 0; text-align: center; color: var(--ink-3); }
.backup-preview { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-bottom: 10px; }
.backup-preview > div { padding: 12px; text-align: center; border-radius: 9px; background: var(--bg); border: 1px solid var(--border-soft); }
.backup-preview b, .backup-preview span { display: block; }
.backup-preview b { color: var(--ink); font-size: 18px; }
.backup-preview span { color: var(--ink-3); font-size: 11px; }
.backup-choice { margin-top: 10px; padding: 10px 12px; border-radius: 8px; background: var(--bg); }

#ctx-layer { position: fixed; inset: 0; z-index: 800; pointer-events: none; }
.ctx-menu {
  position: fixed; min-width: 178px; background: var(--card); border: 1px solid var(--border);
  border-radius: 12px; box-shadow: var(--shadow-pop); padding: 5px;
  animation: popIn .15s var(--ease); max-height: 70vh; overflow-y: auto;
}
.ctx-item {
  display: flex; align-items: center; gap: 9px; width: 100%; text-align: left;
  padding: 7px 11px; border-radius: 8px; font-size: 13px; color: var(--ink); transition: background .12s;
}
.ctx-item:hover { background: var(--accent-ghost); }
.ctx-item .ic { color: var(--ink-3); }
.ctx-item:hover .ic { color: var(--accent-deep); }
.ctx-item.danger { color: var(--danger); }
.ctx-item.danger .ic { color: var(--danger); }
.ctx-item.danger:hover { background: var(--danger-soft); }
.ctx-item .sub-arrow { margin-left: auto; color: var(--ink-3); }
.ctx-sep { height: 1px; background: var(--border-soft); margin: 5px 8px; }
.ctx-group-title { font-size: 10.5px; color: var(--ink-3); padding: 7px 11px 3px; font-weight: 700; letter-spacing: 1px; }

#toast-layer { position: fixed; bottom: 26px; left: 50%; transform: translateX(-50%); z-index: 1000; display: flex; flex-direction: column; gap: 8px; align-items: center; }
.toast {
  background: var(--ink); color: #FBFAF6; border-radius: 10px; padding: 9px 18px; font-size: 12.5px;
  box-shadow: var(--shadow-pop); animation: toastIn .3s var(--ease); display: flex; align-items: center; gap: 8px;
}
.toast.error { background: var(--danger); }
.toast .ic { color: rgba(255,255,255,.85); }
@keyframes toastIn { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: none; } }
.toast.out { animation: toastOut .25s var(--ease) forwards; }
@keyframes toastOut { to { opacity: 0; transform: translateY(8px); } }

/* 模型下拉 */
.model-pick {
  display: flex; justify-content: flex-end; align-items: center;
  padding: 6px 14px 0; flex: none;
}
.model-pick button {
  display: flex; align-items: center; gap: 5px; max-width: 100%;
  font-size: 11.5px; color: var(--ink-2); padding: 4px 9px 4px 7px;
  border-radius: 20px; border: 1px solid var(--border-soft);
  background: var(--card); transition: all .15s var(--ease);
}
.model-pick button:hover { border-color: var(--accent); color: var(--accent-deep); }
.model-pick button .mp-name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 200px; }

.model-menu {
  position: fixed; z-index: 850; background: var(--card); border: 1px solid var(--border);
  border-radius: 12px; box-shadow: var(--shadow-pop); padding: 5px; min-width: 220px;
  animation: popIn .15s var(--ease);
}

/* 右栏折叠时的拉回入口 */
.rp-expand {
  position: fixed; right: 0; top: 50%; transform: translateY(-50%);
  z-index: 700; display: none; align-items: center; justify-content: center;
  width: 24px; height: 56px; border-radius: 10px 0 0 10px;
  background: var(--card); color: var(--accent-deep);
  border: 1px solid var(--border); border-right: none;
  box-shadow: var(--shadow-soft);
  transition: background .15s var(--ease), color .15s var(--ease);
  animation: popIn .25s var(--ease);
}
.rp-expand:hover { background: var(--accent-soft); color: var(--accent-deep); }
#app.rp-collapsed .rp-expand { display: flex; }

/* 大图预览 */
.img-viewer {
  position: fixed; inset: 0; z-index: 960; background: rgba(46, 43, 37, .72);
  display: flex; align-items: center; justify-content: center; cursor: zoom-out;
  animation: fadeIn .18s;
}
.img-viewer img { max-width: 88vw; max-height: 88vh; border-radius: 10px; box-shadow: var(--shadow-pop); }

/* 空状态 */

/* Reader: size against the actual middle panel, never clip commands. */
#reader-toolbar { height: auto; min-height: 90px; flex-wrap: wrap; padding: 6px 10px; gap: 4px 6px; overflow: visible; }
#reader-toolbar .rt-back { flex: none; }
#reader-toolbar .rt-title-wrap { flex: 1 1 32px; min-width: 32px; max-width: none; margin: 0; }
#reader-toolbar .rt-right { margin-left: 0; flex: none; gap: 3px; }
#reader-toolbar .rt-center { order: 4; flex: 1 0 100%; min-width: 0; max-width: 100%; overflow-x: auto; padding-bottom: 4px; margin-left: 0; }
#reader-toolbar .rt-center > * { flex-shrink: 0; }
#reader-toolbar #ink-undo, #reader-toolbar #zoom-in, #reader-toolbar #zoom-out, #reader-toolbar #zoom-fit, #reader-toolbar .rt-divider { display: inline-flex; }
#reader-toolbar .zoom-label { display: inline-block; }
#pages-root { width: max-content; min-width: 100%; padding: 26px 28px 60px; }
.pg { flex: none; }
.pg .ink-layer { pointer-events: none; }
#btn-sb-toggle { display: none; }

/* TextLayer geometry from Mozilla PDF.js 6.2.108, Apache-2.0. */
.textLayer { --min-font-size: 1; --text-scale-factor: calc(var(--total-scale-factor) * var(--min-font-size)); --min-font-size-inv: calc(1 / var(--min-font-size)); }
.textLayer > :not(.markedContent), .textLayer .markedContent span:not(.markedContent) {
  --font-height: 0; --scale-x: 1; --rotate: 0deg;
  font-size: calc(var(--text-scale-factor) * var(--font-height));
  transform: rotate(var(--rotate)) scaleX(var(--scale-x)) scale(var(--min-font-size-inv));
}
.textLayer .markedContent { display: contents; }
.textLayer ::selection { background: rgba(123, 148, 132, .35); color: transparent; }
@media (max-width: 1000px) {
  #sidebar { position: fixed; inset: 0 auto 0 0; width: min(288px, calc(100vw - 48px)); z-index: 60; transform: translateX(-100%); box-shadow: var(--shadow-pop); }
  #app.sidebar-open #sidebar { transform: none; padding-bottom: 58px; }
  #btn-sb-toggle { display: block; position: fixed; left: 12px; bottom: 12px; z-index: 710; padding: 9px 14px; border-radius: 18px; background: var(--accent); color: white; box-shadow: var(--shadow-soft); }
  #right-panel { position: fixed; right: 0; top: 0; bottom: 0; z-index: 50; width: min(372px, calc(100vw - 48px)); box-shadow: var(--shadow-pop); }
  #app.rp-collapsed #right-panel { width: 0; }
}
.fatal {
  position: fixed; inset: 0; z-index: 2000; display: flex; align-items: center; justify-content: center;
  background: var(--bg); text-align: center; padding: 30px; line-height: 2; color: var(--ink-2); font-size: 14px;
}

/* 窄窗口渐进收纳：保证阅读器工具栏永远单行不换行 */
@media (max-width: 1420px) {
  .zoom-label { display: none; }
  #reader-toolbar { gap: 4px; padding: 0 10px; }
  .rt-title-wrap { max-width: 240px; }
  .rp-tabs button { padding: 7px 9px; }
  .model-chip { max-width: 120px; }
}
@media (max-width: 1300px) {
  #zoom-fit { display: none; }
  .rt-title-wrap { max-width: 170px; }
  #sidebar { width: 256px; }
  #right-panel { width: 372px; }
  .rp-tabs button { padding: 7px 8px; font-size: 12.5px; }
  .model-chip { max-width: 96px; }
  #reader-toolbar { gap: 3px; padding: 0 8px; }
  #reader-toolbar .ibtn { width: 28px; height: 28px; }
  .rt-divider { margin: 0 2px; }
  .rt-title-wrap { margin: 0 6px; min-width: 40px; }
  .rt-right { gap: 3px; }
  .btn-done { padding: 5px 9px; font-size: 12px; }
}
@media (max-width: 1150px) {
  #sidebar { width: 232px; }
  #right-panel { width: 340px; }
  .rt-title-wrap { max-width: 110px; min-width: 32px; }
  .page-ind { font-size: 11.5px; padding: 0 2px; }
  .page-ind input { width: 26px; }
  #reader-toolbar .ibtn { width: 26px; height: 26px; }
  #ink-undo, #zoom-in, #zoom-out, #reader-toolbar .rt-divider { display: none; }
  .btn-done { padding: 5px 7px; font-size: 11.5px; gap: 3px; }
  .rp-head { padding: 0 6px 0 4px; gap: 4px; }
}
@media (max-width: 1060px) {
  .rt-status span:first-child { display: none; }
  .rt-title-wrap { max-width: 80px; }
}

/* 侧栏文献拖拽排序 */
.paper-row .pr-main { cursor: grab; }
.paper-row .pr-main:active { cursor: grabbing; }
.paper-row.dragging { opacity: .35; }
.paper-row.dragging .pr-main { cursor: grabbing; }
.paper-row.drop-before { box-shadow: inset 0 2px 0 var(--accent); border-radius: 2px; }
.paper-row.drop-after { box-shadow: inset 0 -2px 0 var(--accent); border-radius: 2px; }
.sb-sec-head.drop-target { background: var(--accent-soft); color: var(--accent-deep); }

/* 空状态 */
@media (max-width: 1000px) {
  #sidebar { width: min(288px, calc(100vw - 48px)); }
  #right-panel { width: min(372px, calc(100vw - 48px)); }
}

/* Prevent iOS Safari from zooming the viewport when a compact form gains focus. */
@media (max-width: 640px) {
  #chat-input, #note-area, .page-ind input,
  .modal-body input, .modal-body textarea, .modal-body select,
  .card-edit input, .card-edit textarea { font-size: 16px; }
  .sb-search input { font-size: 16px; }
  .backup-auto { grid-template-columns: 1fr 1fr; }
  .backup-auto label:first-child, .backup-auto button { grid-column: 1 / -1; }
  .backup-row { align-items: flex-start; flex-direction: column; }
}

/* Reading gestures, Markdown and live response feedback */
#reader-scroll.hand-mode, #reader-scroll.hand-mode .pg,
#reader-scroll.hand-mode .textLayer { cursor: grab; touch-action: none; user-select: none; }
#reader-scroll.hand-mode .textLayer { pointer-events: none; }
#reader-scroll.hand-mode.is-panning, #reader-scroll.hand-mode.is-panning * { cursor: grabbing !important; }
.note-head { flex-wrap: wrap; gap: 5px 10px; }
.note-tools { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; padding: 0 16px 12px; flex: none; }
.note-tools .seg { width: 128px; flex: none; }
.note-tools > span { font-size: 10.5px; color: var(--ink-3); }
#note-area { min-height: 150px; font-family: Consolas, "Microsoft YaHei", monospace; tab-size: 2; }
#note-preview { flex: 1; min-height: 150px; overflow: auto; padding: 4px 18px 24px; }
#tab-notes .hl-list { flex: none; max-height: 30%; overflow: auto; }
.note-empty { color: var(--ink-3); }
.md-content { font-size: 13px; line-height: 1.85; overflow-wrap: anywhere; min-width: 0; }
.md-content > :first-child { margin-top: 0; }
.md-content h1, .md-content h2, .md-content h3, .md-content h4, .md-content h5, .md-content h6 { line-height: 1.5; margin: 20px 0 10px; font-weight: 650; }
.md-content h1 { font-size: 22px; border-bottom: 1px solid var(--border); padding-bottom: 8px; }
.md-content h2 { font-size: 18px; }
.md-content h3 { font-size: 15px; }
.md-content h4, .md-content h5, .md-content h6 { font-size: 13px; }
.md-content p { margin: 0 0 10px; }
.md-content ul, .md-content ol { padding-left: 22px; margin: 6px 0 12px; }
.md-content li { margin: 3px 0; }
.md-content blockquote { margin: 12px 0; padding: 8px 12px; border-left: 3px solid var(--accent); background: var(--accent-ghost); color: var(--ink-2); }
.md-content blockquote p:last-child { margin-bottom: 0; }
.md-content a { color: var(--accent-deep); text-decoration: underline; text-underline-offset: 3px; }
.md-content code { font-family: Consolas, monospace; font-size: 12px; background: var(--gold-soft); border-radius: 4px; padding: 2px 4px; }
.md-content pre { overflow: auto; max-width: 100%; padding: 12px; margin: 12px 0; border: 1px solid var(--border-soft); border-radius: 8px; background: var(--card); }
.md-content pre code, .msg-ai .body pre code { background: transparent; padding: 0; white-space: pre; word-break: normal; overflow-wrap: normal; }
.md-table-wrap { max-width: 100%; overflow-x: auto; margin: 12px 0; }
.md-content table { border-collapse: collapse; min-width: 100%; font-size: 12px; }
.md-content th, .md-content td { border: 1px solid var(--border); padding: 7px 9px; text-align: left; }
.md-content th { background: var(--accent-ghost); font-weight: 600; }
.md-content hr { border: 0; border-top: 1px solid var(--border); margin: 18px 0; }
.md-content input[type="checkbox"] { margin-right: 5px; accent-color: var(--accent); }
.chat-progress { display: flex; align-items: center; gap: 9px; flex: none; margin: 0 14px 6px; padding: 8px 10px; border: 1px solid var(--border-soft); border-radius: 9px; color: var(--accent-deep); background: var(--accent-ghost); font-size: 12px; }
.progress-hint { margin-left: auto; color: var(--ink-3); font-size: 10.5px; }
.activity-dots { display: inline-flex; align-items: center; gap: 3px; height: 16px; }
.activity-dots i { display: block; width: 4px; height: 4px; border-radius: 50%; background: currentColor; animation: response-pulse 1.2s ease-in-out infinite; }
.activity-dots i:nth-child(2) { animation-delay: .16s; }
.activity-dots i:nth-child(3) { animation-delay: .32s; }
@keyframes response-pulse { 0%, 70%, 100% { transform: translateY(0); opacity: .35; } 35% { transform: translateY(-3px); opacity: 1; } }
.stream-placeholder { max-width: 280px; padding: 2px 0 6px; }
.stream-placeholder .shimmer { margin-top: 8px; height: 10px; }
.stream-placeholder .shimmer:nth-child(2) { width: 65%; }
.send-btn.is-stop { background: var(--ink-2); }
.send-btn.is-stop:hover { background: var(--danger); }
.msg-ai[aria-busy="true"] .reasoning summary { color: var(--accent-deep); }
@media (prefers-reduced-motion: reduce) {
  .activity-dots i, .shimmer, .cursor-blink, .spin { animation: none !important; }
}