:root{
  --bg:#0e1117; --bg2:#141923; --card:#171d29; --card2:#1c2331;
  --line:#28303f; --line2:#333d50;
  --text:#e7ecf5; --muted:#8b98ae; --dim:#5f6c82;
  --accent:#4dd6c1; --accent2:#3aa9ff; --warn:#f5b454; --danger:#ff7a7a;
  --radius:10px;
}
*{box-sizing:border-box}
html,body{margin:0;height:100%}
body{
  background:var(--bg); color:var(--text);
  font:14px/1.6 -apple-system,"Segoe UI","Microsoft YaHei",Roboto,Arial,sans-serif;
  overflow:hidden;
}
button,input,select{font-family:inherit;font-size:13px;color:inherit}
a{color:var(--accent2);text-decoration:none}
a:hover{text-decoration:underline}
.hidden{display:none !important}
.muted{color:var(--muted)} .small{font-size:12px}
.full{width:100%}
code{background:#0d121b;border:1px solid var(--line);padding:1px 5px;border-radius:4px;color:#a9e7dc;font-size:12px}
pre{background:#0d121b;border:1px solid var(--line);padding:12px 14px;border-radius:8px;overflow:auto;color:#c9d6e8;font-size:12.5px}

/* ---------- 顶栏 ---------- */
.topbar{height:62px;display:flex;align-items:center;gap:28px;padding:0 22px;
  background:var(--bg2);border-bottom:1px solid var(--line)}
.brand{display:flex;align-items:center;gap:11px;min-width:290px}
.brand-mark{width:34px;height:34px;border-radius:9px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--accent),var(--accent2));color:#08131a;font-weight:800;font-size:13px;letter-spacing:.5px}
.brand b{display:block;font-size:14.5px;letter-spacing:.2px}
.brand small{display:block;color:var(--dim);font-size:11px;letter-spacing:.3px}
.tabs{display:flex;gap:4px;height:100%;align-items:center}
.tab{background:none;border:0;padding:8px 16px;border-radius:7px;color:var(--muted);cursor:pointer;font-size:13.5px}
.tab:hover{color:var(--text);background:#ffffff0a}
.tab.active{color:var(--accent);background:#4dd6c118;font-weight:600}
.top-right{margin-left:auto;display:flex;align-items:center;gap:10px}
.who{color:var(--dim);font-size:11.5px;max-width:150px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.pill{background:#4dd6c116;color:var(--accent);border:1px solid #4dd6c133;
  padding:5px 12px;border-radius:20px;font-size:12px;white-space:nowrap}
.pill.busy{background:#f5b45416;color:var(--warn);border-color:#f5b45433}
.global-progress{height:26px;background:#182231;position:relative;display:flex;align-items:center;
  border-bottom:1px solid var(--line);font-size:11.5px;color:var(--muted)}
.global-progress>div{position:absolute;left:0;top:0;bottom:0;background:linear-gradient(90deg,#4dd6c133,#3aa9ff22);transition:width .4s}
.global-progress span{position:relative;padding-left:20px;z-index:1}

/* ---------- 布局 ---------- */
main{height:calc(100vh - 62px);overflow:hidden}
.view{display:none;height:100%}
.view.active{display:flex}
#view-read{display:none}
#view-read.active{display:flex}
.sidebar{width:272px;flex:0 0 272px;background:var(--bg2);border-right:1px solid var(--line);
  padding:16px 13px;overflow:auto}
.side-title{font-size:11.5px;letter-spacing:1.4px;text-transform:uppercase;color:var(--dim);
  font-weight:700;margin:2px 6px 10px;display:flex;justify-content:space-between}
.book-list,.toc-list{display:flex;flex-direction:column;gap:4px}
.book-item{padding:9px 10px;border-radius:8px;cursor:pointer;border:1px solid transparent}
.book-item:hover{background:#ffffff08}
.book-item.active{background:#4dd6c114;border-color:#4dd6c137}
.book-item .bn{font-size:12.5px;line-height:1.35;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.book-item .bm{font-size:11px;color:var(--dim);margin-top:3px}
.toc-item{padding:5px 9px;font-size:12px;color:var(--muted);border-radius:6px;cursor:pointer;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;border-left:2px solid transparent}
.toc-item:hover{background:#ffffff0a;color:var(--text)}
.toc-item.lv1{color:var(--text);font-weight:600;margin-top:5px}
.toc-item.lv2{padding-left:18px}
.toc-item.lv3{padding-left:28px;font-size:11.5px}
.toc-item.active{border-left-color:var(--accent);background:#4dd6c112;color:var(--accent)}
.read-main{flex:1;min-width:0;display:flex;flex-direction:column;gap:12px;padding:14px 16px;overflow:hidden}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius)}
.player{padding:13px 16px 11px;flex:0 0 auto}
.player-row{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.player-row+.player-row{margin-top:11px}
.page-nav{display:flex;align-items:center;gap:5px}
.page-input{width:66px;background:#0e141e;border:1px solid var(--line2);border-radius:6px;padding:5px 8px;text-align:center}
.page-meta{margin-left:auto;font-size:11.5px;color:var(--dim)}
.slider{width:100%;accent-color:var(--accent);height:4px;margin:10px 0 2px;cursor:pointer}
.small-slider{width:120px;margin:0;vertical-align:middle}
.controls{padding-top:2px}
.field{display:inline-flex;align-items:center;gap:7px;font-size:12px;color:var(--muted);white-space:nowrap}
.field.inline{margin-left:auto}
.select,.num,.search{background:#0e141e;border:1px solid var(--line2);border-radius:6px;padding:6px 9px;outline:none}
.select:focus,.num:focus,.search:focus{border-color:var(--accent)}
.num{width:66px}
.search{min-width:210px}
.check{display:inline-flex;align-items:center;gap:5px;font-size:12px;color:var(--muted);cursor:pointer;white-space:nowrap}
.check input{accent-color:var(--accent)}
.sep{width:1px;height:20px;background:var(--line2);margin:0 3px}
.audio-state{min-width:190px;font-size:12px;color:var(--muted)}
.audio-progress{flex:1;height:5px;background:#0d131d;border-radius:4px;overflow:hidden}
.audio-progress>div{height:100%;width:0;background:linear-gradient(90deg,var(--accent),var(--accent2));transition:width .3s}

.btn{background:#232c3c;border:1px solid var(--line2);border-radius:7px;padding:7px 13px;
  cursor:pointer;color:var(--text);transition:.15s;white-space:nowrap}
.btn:hover{background:#2c384c;border-color:#46547080}
.btn:disabled{opacity:.4;cursor:not-allowed}
.btn.primary{background:linear-gradient(135deg,#3ec9b5,#2f9fe6);color:#06131b;border:0;font-weight:700}
.btn.primary:hover{filter:brightness(1.12)}
.btn.ghost{background:transparent}
.btn.danger{color:var(--danger);border-color:#ff7a7a44;background:#ff7a7a0e}
.btn.small{padding:5px 10px;font-size:12px}
.btn.icon{padding:5px 10px;min-width:32px}

/* ---------- 阅读区 ---------- */
.reader{flex:1;min-height:0;display:flex;flex-direction:column;overflow:hidden}
.reader-head{display:flex;align-items:center;justify-content:space-between;padding:9px 14px;border-bottom:1px solid var(--line);gap:12px}
.seg{display:flex;background:#0e141e;border:1px solid var(--line2);border-radius:7px;padding:2px}
.seg-btn{border:0;background:none;color:var(--muted);padding:4px 12px;border-radius:5px;cursor:pointer;font-size:12px}
.seg-btn.active{background:#2a3547;color:var(--text)}
.reader-text,.reader-image{flex:1;overflow:auto;padding:20px 28px 40px;scroll-behavior:smooth}
.reader-text{font-size:15px;line-height:1.95;color:#d7dfec;max-width:920px}
.reader-text p{margin:0 0 7px}
.chunk{padding:7px 12px;border-left:3px solid transparent;border-radius:0 6px 6px 0;margin:0 0 4px;transition:.2s}
.chunk.active{background:#4dd6c115;border-left-color:var(--accent);color:#fff}
.chunk.done{color:var(--dim)}
.reader-image{display:flex;justify-content:center;background:#0b0f16}
.reader-image img{max-width:100%;box-shadow:0 6px 30px #0008}

/* ---------- 生词本 ---------- */
#view-vocab.active{display:block;overflow:auto}
.vocab-wrap{padding:14px 16px;display:flex;flex-direction:column;gap:12px;min-height:100%}
.toolbar{padding:12px 14px}
.toolbar-row{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.toolbar-row+.toolbar-row{margin-top:10px;padding-top:10px;border-top:1px solid var(--line)}
.export-result{margin-top:11px;padding:10px 12px;background:#0f1722;border:1px solid #4dd6c133;border-radius:7px;font-size:12.5px}
.export-result .file{display:inline-flex;align-items:center;gap:8px;margin:5px 16px 0 0}
.table-card{overflow:hidden}
table.word-table{width:100%;border-collapse:collapse;font-size:12.5px}
.word-table th{text-align:left;padding:9px 10px;background:#131a26;color:var(--dim);
  font-weight:600;font-size:11.5px;letter-spacing:.4px;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:2}
.word-table td{padding:8px 10px;border-bottom:1px solid #222a38;vertical-align:top}
.word-table tr:hover td{background:#ffffff05}
.word-table input[type=checkbox]{accent-color:var(--accent)}
.w-word{font-size:14px;font-weight:650;color:#eaf3ff;letter-spacing:.2px}
.w-forms{font-size:11px;color:var(--dim);margin-top:2px}
.w-gloss{color:#a9e7dc}
.w-example{color:var(--muted);font-size:12px;line-height:1.55;max-width:560px}
.w-example em{color:var(--dim);font-style:normal}
.badge{display:inline-block;font-size:10px;padding:1px 6px;border-radius:4px;margin-left:6px;vertical-align:middle}
.badge.common{background:#f5b4541a;color:var(--warn);border:1px solid #f5b45433}
.badge.abbr{background:#3aa9ff18;color:var(--accent2);border:1px solid #3aa9ff33}
.empty{padding:60px;text-align:center;color:var(--dim)}
.pager{display:flex;align-items:center;gap:12px;padding:10px 14px;border-top:1px solid var(--line)}
.row-btn{border:0;background:none;color:var(--muted);cursor:pointer;font-size:11.5px;padding:2px 5px}
.row-btn:hover{color:var(--accent)}

/* ---------- 帮助 ---------- */
#view-help.active{display:block;overflow:auto}
.help-wrap{max-width:900px;margin:22px auto;padding:26px 30px;line-height:1.85}
.help-wrap h2{font-size:20px;margin:0 0 12px}
.help-wrap h3{font-size:15px;margin:26px 0 8px;color:var(--accent)}
.help-wrap p,.help-wrap li{color:#c3ccdb}
.help-wrap ul,.help-wrap ol{padding-left:22px}
.help-wrap li{margin:4px 0}
.status-box{margin-top:24px;padding:12px 14px;background:#0d121b;border:1px solid var(--line);border-radius:8px;
  font-size:12px;color:var(--muted);white-space:pre-wrap}

.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);z-index:99;
  background:#223047;border:1px solid var(--line2);padding:10px 18px;border-radius:8px;
  box-shadow:0 8px 30px #0009;font-size:13px}
.toast.err{border-color:#ff7a7a66;color:#ffb3b3}

::-webkit-scrollbar{width:9px;height:9px}
::-webkit-scrollbar-track{background:transparent}
::-webkit-scrollbar-thumb{background:#2b3546;border-radius:6px}
::-webkit-scrollbar-thumb:hover{background:#3c4a60}

/* ---------- 页面导入 PDF ---------- */
.drop-zone{border:1.5px dashed #3a4c63;border-radius:9px;padding:14px 8px 13px;text-align:center;
  cursor:pointer;transition:.18s;background:#111926;line-height:1.5}
.drop-zone:hover,.drop-zone.drag{border-color:var(--accent);background:#4dd6c112;box-shadow:0 0 0 3px #4dd6c10d inset}
.dz-icon{font-size:22px;line-height:1;color:var(--accent);font-weight:300;margin-bottom:4px}
.dz-main{font-size:12.5px;font-weight:600;color:#dce7f5}
.import-progress{height:20px;background:#0e1622;border:1px solid var(--line);border-radius:6px;
  margin-top:8px;position:relative;display:flex;align-items:center;overflow:hidden}
.import-progress>div{position:absolute;left:0;top:0;bottom:0;width:0;
  background:linear-gradient(90deg,#4dd6c144,#3aa9ff33);transition:width .2s}
.import-progress span{position:relative;padding-left:9px;font-size:11px;color:var(--muted)}
.book-item{position:relative;padding-right:24px}
.book-remove{position:absolute;right:6px;top:7px;width:17px;height:17px;line-height:15px;
  border:0;border-radius:4px;background:transparent;color:var(--dim);font-size:15px;
  cursor:pointer;opacity:0;transition:.15s;padding:0}
.book-item:hover .book-remove{opacity:1}
.book-remove:hover{background:#ff7a7a22;color:var(--danger)}

/* ---------- 空状态 ---------- */
.empty-state{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;
  text-align:center;padding:40px 30px;gap:6px}
.empty-state h2{font-size:19px;margin:10px 0 4px}
.empty-state p{color:var(--muted);font-size:13px;line-height:1.9;margin:4px 0}
.es-icon{width:56px;height:56px;border-radius:14px;display:grid;place-items:center;font-weight:800;
  font-size:15px;letter-spacing:1px;color:#07131b;background:linear-gradient(135deg,var(--accent),var(--accent2))}
.es-actions{display:flex;gap:10px;margin-top:16px}

/* ---------- 扫描 data/books 导入弹窗 ---------- */
.modal{position:fixed;inset:0;background:#05080dc9;display:grid;place-items:center;z-index:60}
.modal-card{width:min(620px,92vw);max-height:80vh;display:flex;flex-direction:column;padding:20px 22px}
.modal-card h3{margin:0 0 8px;font-size:16px}
.modal-card p{margin:0 0 12px;line-height:1.7}
.local-list{flex:1;overflow:auto;border:1px solid var(--line);border-radius:8px;padding:6px;background:#0f1622}
.local-row{display:flex;align-items:center;gap:10px;padding:8px 9px;border-radius:6px;cursor:pointer;font-size:12.5px}
.local-row:hover{background:#ffffff08}
.local-row input{accent-color:var(--accent)}
.local-row span:nth-child(2){flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.local-row .muted{white-space:nowrap}
.modal-actions{display:flex;align-items:center;gap:9px;margin-top:14px}
.modal-actions #localTip{margin-right:auto}

/* ---------- 登录 / 首次初始化 ---------- */
.auth-body{overflow:auto;display:grid;place-items:center;min-height:100vh;padding:24px}
.auth-card{width:100%;max-width:420px;background:var(--card);border:1px solid var(--line);
  border-radius:14px;padding:28px 26px}
.auth-card h1{font-size:17px;margin:16px 0 6px}
.auth-card .lead{margin:0 0 16px;color:var(--muted);font-size:12.5px;line-height:1.7}
.auth-card label{display:block;margin-top:12px;font-size:12px;color:var(--muted)}
.auth-card input[type=text],.auth-card input[type=password]{width:100%;margin-top:5px;padding:11px 12px;
  background:#0d121b;border:1px solid var(--line2);border-radius:8px;font-size:14px}
.auth-card input[type=text]:focus,.auth-card input[type=password]:focus{outline:none;border-color:var(--accent)}
.auth-check{display:flex;align-items:center;gap:8px;margin-top:14px;color:var(--muted);font-size:12.5px}
.auth-check input{accent-color:var(--accent);margin:0}
.auth-card button{width:100%;margin-top:16px;padding:11px;border:0;border-radius:8px;cursor:pointer;
  background:linear-gradient(135deg,var(--accent),var(--accent2));color:#08131a;font-weight:700;font-size:14px}
.auth-card button:hover{filter:brightness(1.06)}
.auth-err{margin-top:12px;color:var(--danger);font-size:12.5px}
.auth-ok{margin-top:12px;color:var(--accent);font-size:12.5px}
.auth-foot{margin-top:18px;color:var(--dim);font-size:11.5px;line-height:1.8}
.auth-foot code{font-size:11px}
.auth-rules{margin:10px 0 0;padding-left:18px;color:var(--dim);font-size:11.5px;line-height:1.9}