:root{
  --bg:#f1efe9;
  --panel:#ffffff;
  --panel-2:#faf8f2;
  --ink:#262420;
  --muted:#8b8578;
  --line:#e7e2d6;
  --accent:#3d6ea6;
  --accent-2:#2f5b8a;
  --accent-soft:#e7eef7;
  --page:#fffdf7;
  --rule:rgba(70,110,150,.15);
  --shadow:0 1px 2px rgba(35,30,20,.06),0 10px 30px rgba(35,30,20,.08);
  --topbar:52px;
  --toolbar:48px;
  --sidebar:276px;
  --lh:32px;
}
html[data-theme="dark"]{
  --bg:#101216;
  --panel:#191b21;
  --panel-2:#1e2128;
  --ink:#e8e5df;
  --muted:#8d929c;
  --line:#2b2f38;
  --accent:#6ea8fe;
  --accent-2:#8bb9ff;
  --accent-soft:#22303f;
  --page:#1c1f25;
  --rule:rgba(255,255,255,.06);
  --shadow:0 1px 2px rgba(0,0,0,.4),0 12px 34px rgba(0,0,0,.45);
}

*{box-sizing:border-box;}
html,body{height:100%;margin:0;}
body{
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  background:var(--bg);color:var(--ink);
  -webkit-tap-highlight-color:transparent;
  overscroll-behavior:none;
  -webkit-font-smoothing:antialiased;
}
button{font-family:inherit;color:inherit;}
input{font-family:inherit;}
svg{display:block;}

.app{height:100vh;height:100dvh;display:flex;flex-direction:column;overflow:hidden;}

/* ---------- 顶栏 ---------- */
.topbar{
  flex:0 0 auto;display:flex;align-items:center;gap:10px;
  height:calc(var(--topbar) + env(safe-area-inset-top));
  padding:env(safe-area-inset-top) 12px 0 12px;
  background:var(--panel);border-bottom:1px solid var(--line);z-index:30;
}
.brand{display:flex;align-items:baseline;gap:6px;flex:0 0 auto;}
.brand-mark{
  display:inline-flex;align-items:center;justify-content:center;
  width:26px;height:26px;border-radius:7px;background:var(--accent);color:#fff;
  font-size:14px;font-weight:600;transform:translateY(2px);
}
.brand-name{font-size:16px;font-weight:600;letter-spacing:.5px;}
.brand-sub{font-size:11px;color:var(--muted);letter-spacing:.6px;}
.crumbs{
  flex:1 1 auto;min-width:0;color:var(--muted);font-size:12px;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
  padding-left:6px;
}
.crumbs b{color:var(--ink);font-weight:500;}
.top-right{display:flex;align-items:center;gap:8px;flex:0 0 auto;}
.save-state{
  display:flex;align-items:center;gap:6px;font-size:12px;color:var(--muted);
  padding:4px 9px;border-radius:20px;background:var(--panel-2);border:1px solid var(--line);
  white-space:nowrap;
}
.save-state .dot{width:6px;height:6px;border-radius:50%;background:#38a169;transition:.2s;}
.save-state[data-state="saving"] .dot{background:#e0a136;}
.save-state[data-state="error"] .dot{background:#d9463e;}
.icon-btn{
  width:34px;height:34px;display:inline-flex;align-items:center;justify-content:center;
  border:1px solid transparent;border-radius:8px;background:transparent;cursor:pointer;
  color:var(--ink);transition:.15s;
}
.icon-btn:hover{background:var(--panel-2);border-color:var(--line);}
.only-mobile{display:none;}

/* ---------- 工作区 ---------- */
.workspace{flex:1 1 auto;min-height:0;display:flex;}

.sidebar{
  flex:0 0 var(--sidebar);width:var(--sidebar);background:var(--panel);
  border-right:1px solid var(--line);display:flex;flex-direction:column;
  min-height:0;overflow:hidden;z-index:20;
}
.side-block{padding:12px 12px 6px;flex:0 0 auto;}
.side-label{
  font-size:11px;color:var(--muted);letter-spacing:.8px;margin-bottom:6px;
  display:flex;align-items:center;gap:6px;
}
.side-label .count{color:var(--muted);font-size:10px;opacity:.8;}
.nb-row{display:flex;gap:6px;align-items:center;}
.nb-select{
  flex:1 1 auto;min-width:0;height:32px;border-radius:8px;border:1px solid var(--line);
  background:var(--panel-2);color:var(--ink);padding:0 8px;font-size:13px;outline:none;
}
.mini-btn{
  width:28px;height:28px;flex:0 0 auto;border-radius:7px;border:1px solid var(--line);
  background:var(--panel-2);color:var(--ink);cursor:pointer;font-size:16px;line-height:1;
  display:inline-flex;align-items:center;justify-content:center;
}
.mini-btn:hover{border-color:var(--accent);color:var(--accent);}

.section-block{flex:0 0 auto;}
.sections{display:flex;flex-wrap:wrap;gap:6px;max-height:132px;overflow-y:auto;padding-right:2px;}
.section-chip{
  display:inline-flex;align-items:center;gap:2px;border:1px solid var(--line);
  background:var(--panel-2);border-radius:20px;padding:3px 4px 3px 10px;font-size:12px;
  cursor:pointer;color:var(--muted);transition:.15s;max-width:100%;
}
.section-chip .sc-name{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:130px;}
.section-chip:hover{border-color:var(--accent);}
.section-chip.active{background:var(--accent);border-color:var(--accent);color:#fff;}
.section-chip.active .sc-more{color:#fff;}
.section-chip .sc-more{
  border:none;background:transparent;cursor:pointer;padding:0 4px;font-size:13px;
  color:var(--muted);line-height:1;border-radius:4px;
}
.section-chip .sc-more:hover{background:rgba(0,0,0,.08);}
.section-add{
  width:28px;height:26px;border-radius:20px;border:1px dashed var(--line);
  background:transparent;color:var(--muted);cursor:pointer;font-size:15px;line-height:1;
}
.section-add:hover{color:var(--accent);border-color:var(--accent);}

.pages-head{padding:10px 12px 6px;border-top:1px solid var(--line);margin-top:8px;}
.pages-actions{display:flex;gap:6px;align-items:center;}
.search-input{
  flex:1 1 auto;min-width:0;height:28px;border-radius:7px;border:1px solid var(--line);
  background:var(--panel-2);padding:0 8px;font-size:12px;color:var(--ink);outline:none;
}
.search-input:focus{border-color:var(--accent);}

.page-list{flex:1 1 auto;min-height:0;overflow-y:auto;padding:2px 8px 10px;}
.page-row{
  display:flex;align-items:flex-start;gap:6px;padding:8px 9px;border-radius:8px;
  cursor:pointer;border-left:3px solid transparent;transition:.12s;
}
.page-row:hover{background:var(--panel-2);}
.page-row.active{background:var(--accent-soft);border-left-color:var(--accent);}
.pr-main{flex:1 1 auto;min-width:0;}
.pr-title{font-size:13.5px;font-weight:500;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.pr-preview{
  font-size:11.5px;color:var(--muted);margin-top:3px;line-height:1.45;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.pr-badge{font-size:10px;color:var(--accent);opacity:.9;margin-bottom:2px;}
.pr-menu{
  flex:0 0 auto;width:22px;height:22px;border-radius:5px;border:none;background:transparent;
  color:var(--muted);cursor:pointer;opacity:0;font-size:14px;line-height:1;
}
.page-row:hover .pr-menu,.page-row.active .pr-menu{opacity:.9;}
.pr-menu:hover{background:rgba(0,0,0,.06);}
.side-foot{
  flex:0 0 auto;display:flex;gap:6px;padding:8px 12px calc(8px + env(safe-area-inset-bottom));
  border-top:1px solid var(--line);background:var(--panel-2);
}
.foot-btn{
  flex:1 1 0;height:30px;border-radius:7px;border:1px solid var(--line);
  background:var(--panel);color:var(--muted);font-size:12px;cursor:pointer;
}
.foot-btn:hover{color:var(--accent);border-color:var(--accent);}

/* ---------- 工具条 ---------- */
.stage{flex:1 1 auto;min-width:0;display:flex;flex-direction:column;min-height:0;}
.toolbar{
  flex:0 0 auto;display:flex;align-items:center;gap:8px;
  min-height:var(--toolbar);padding:0 12px;background:var(--panel);
  border-bottom:1px solid var(--line);overflow-x:auto;overflow-y:hidden;
  scrollbar-width:none;
}
.toolbar::-webkit-scrollbar{display:none;}
.group{display:flex;align-items:center;gap:3px;flex:0 0 auto;}
.right-group{margin-left:auto;}
.sep{flex:0 0 auto;width:1px;height:24px;background:var(--line);}
.tool{
  width:34px;height:34px;display:inline-flex;align-items:center;justify-content:center;
  border:1px solid transparent;border-radius:8px;background:transparent;color:var(--muted);
  cursor:pointer;transition:.12s;padding:0;
}
.tool:hover{background:var(--panel-2);color:var(--ink);}
.tool.active{background:var(--accent);color:#fff;border-color:var(--accent);}
.tool.text{font-size:14px;font-weight:600;width:32px;color:var(--ink);}
.tool.text.wide{width:auto;padding:0 9px;font-size:12.5px;font-weight:400;color:var(--muted);}
.tool.text.wide:hover{color:var(--ink);}
.size-group{gap:6px;padding:0 4px;}
.size-group input[type=range]{width:64px;height:22px;accent-color:var(--accent);cursor:pointer;}
.size-val{font-size:11px;color:var(--muted);width:14px;text-align:right;}
.swatch{
  width:20px;height:20px;border-radius:50%;border:2px solid transparent;cursor:pointer;
  padding:0;transition:.12s;box-shadow:inset 0 0 0 1px rgba(0,0,0,.22);
}
.swatch.active{border-color:var(--accent);transform:scale(1.12);}
.palette-sep{width:1px;height:20px;background:var(--line);margin:0 2px;}

/* ---------- 同步状态 ---------- */
.sync-chip{
  height:26px;padding:0 10px;border-radius:20px;border:1px solid var(--line);
  background:var(--panel-2);color:var(--muted);font-size:11.5px;cursor:pointer;
  white-space:nowrap;transition:.15s;max-width:150px;overflow:hidden;text-overflow:ellipsis;
}
.sync-chip:hover{border-color:var(--accent);color:var(--accent);}
.sync-chip[data-state="on"]{color:var(--accent);border-color:rgba(61,110,166,.4);}
.sync-chip[data-state="busy"]{color:#b07a12;border-color:rgba(224,161,54,.45);}
.sync-chip[data-state="ok"]{color:#2d7a4f;border-color:rgba(45,122,79,.4);background:rgba(45,122,79,.08);}
.sync-chip[data-state="error"]{color:#c0392b;border-color:rgba(192,57,43,.45);background:rgba(192,57,43,.07);}

/* ---------- 纸张设置面板 ---------- */
.paper-panel{
  position:fixed;z-index:60;width:252px;background:var(--panel);
  border:1px solid var(--line);border-radius:10px;box-shadow:0 12px 34px rgba(0,0,0,.18);
  padding:10px 11px 12px;
}
.pp-title{font-size:11px;color:var(--muted);letter-spacing:.6px;margin:2px 0 6px;}
.pp-row{display:flex;gap:6px;margin-bottom:10px;}
.pp-opt{
  flex:1 1 0;height:30px;border-radius:7px;border:1px solid var(--line);
  background:var(--panel-2);color:var(--ink);font-size:12.5px;cursor:pointer;
}
.pp-opt:hover{border-color:var(--accent);}
.pp-opt.active{background:var(--accent);border-color:var(--accent);color:#fff;}
.pp-colors{display:flex;flex-wrap:wrap;gap:7px;align-items:center;}
.pp-color{
  width:26px;height:26px;border-radius:7px;border:1px solid rgba(0,0,0,.16);
  cursor:pointer;padding:0;
}
.pp-color.active{outline:2px solid var(--accent);outline-offset:1px;}
.pp-custom{display:flex;align-items:center;gap:6px;font-size:11.5px;color:var(--muted);}
.pp-custom input[type=color]{
  width:28px;height:26px;border:1px solid var(--line);border-radius:6px;
  background:transparent;padding:0;cursor:pointer;
}

/* ---------- 同步设置弹窗 ---------- */
.sync-note{
  background:var(--accent-soft);border-radius:9px;padding:10px 12px;
  font-size:12.5px;line-height:1.7;margin-bottom:12px;
}
.sync-form{display:flex;flex-direction:column;gap:9px;margin-bottom:12px;}
.sync-form label{display:flex;flex-direction:column;gap:4px;font-size:12px;color:var(--muted);}
.sync-form input:not([type=checkbox]){
  height:32px;border-radius:7px;border:1px solid var(--line);background:var(--panel-2);
  color:var(--ink);padding:0 9px;font-size:13px;outline:none;
}
.sync-form input:not([type=checkbox]):focus{border-color:var(--accent);}
.sync-form label.check{flex-direction:row;align-items:center;gap:7px;font-size:12.5px;color:var(--ink);}
.sync-actions{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:8px;}
.sync-actions button{
  height:32px;padding:0 13px;border-radius:8px;border:1px solid var(--line);
  background:var(--panel-2);color:var(--ink);font-size:12.5px;cursor:pointer;
}
.sync-actions button:hover{border-color:var(--accent);color:var(--accent);}
.sync-actions button.primary{background:var(--accent);border-color:var(--accent);color:#fff;}
.sync-actions button.primary:hover{color:#fff;opacity:.92;}
.sync-actions button.danger{color:#c0392b;border-color:rgba(192,57,43,.4);}
.sync-actions button.hidden{display:none;}
.sync-msg{font-size:12px;color:var(--muted);min-height:18px;margin-bottom:6px;word-break:break-all;}
.sync-msg[data-danger="1"]{color:#c0392b;}
.modal-body pre{
  background:var(--panel-2);border:1px solid var(--line);border-radius:8px;
  padding:8px 10px;font-size:12px;overflow-x:auto;white-space:pre;
}

/* ---------- 纸张 ---------- */
.scroll{
  flex:1 1 auto;min-height:0;overflow-y:auto;overscroll-behavior:contain;
  padding:14px 14px 0;background:var(--bg);scroll-behavior:smooth;
}
.page{
  position:relative;width:100%;max-width:880px;margin:0 auto 36px;
  background:var(--page);border-radius:9px;box-shadow:var(--shadow);
  min-height:calc(100dvh - 190px);
  overflow:hidden;
  background-size:auto;
  background-position:0 0;
}
.page-inner{position:relative;z-index:1;padding:44px 48px 36vh 64px;}
.page-title{
  width:100%;border:none;outline:none;background:transparent;color:var(--ink);
  font-size:25px;font-weight:600;letter-spacing:.3px;padding:0 0 4px;line-height:1.35;
}
.page-title::placeholder{color:var(--muted);opacity:.6;font-weight:500;}
.page-meta{font-size:11px;color:var(--muted);margin:6px 0 20px;letter-spacing:.2px;}
.blocks{position:relative;min-height:40px;}
.block{position:relative;margin:0 0 4px;}
.block-text{
  font-size:16px;line-height:var(--lh);min-height:var(--lh);
  outline:none;word-break:break-word;overflow-wrap:anywhere;
}
.block-text:empty::before{content:"";display:inline-block;}
.block-text h1,.block-text h2,.block-text h3{line-height:1.5;margin:8px 0 4px;font-weight:600;}
.block-text h1{font-size:24px;}
.block-text h2{font-size:20px;}
.block-text h3{font-size:18px;}
.block-text ul,.block-text ol{margin:0;padding-left:24px;}
.block-text a{color:var(--accent);}
.block-text img{max-width:100%;height:auto;border-radius:4px;}
.block-image{position:relative;max-width:100%;}
.block-image img{display:block;width:100%;height:auto;border-radius:6px;margin:6px 0;}
.img-resize{
  position:absolute;right:-5px;bottom:1px;width:18px;height:18px;border-radius:4px;
  border:1px solid rgba(255,255,255,.7);background:var(--accent);color:#fff;
  opacity:0;cursor:nwse-resize;touch-action:none;padding:0;z-index:5;
  box-shadow:0 2px 6px rgba(0,0,0,.2);transition:opacity .15s;
}
.img-resize::after{
  content:"";position:absolute;right:3px;bottom:3px;width:7px;height:7px;
  border-right:2px solid #fff;border-bottom:2px solid #fff;
}
.block-image:hover .img-resize,.block-image.resizing .img-resize{opacity:.9;}
.block-image.resizing{user-select:none;}
.img-panel{
  position:fixed;z-index:60;display:flex;align-items:center;gap:4px;
  background:var(--panel);border:1px solid var(--line);border-radius:9px;
  padding:5px 7px;box-shadow:0 10px 30px rgba(0,0,0,.18);white-space:nowrap;
  flex-wrap:wrap;max-width:calc(100vw - 16px);
}
.ip-sep{width:1px;height:20px;background:var(--line);margin:0 3px;}
.ip-label{font-size:11px;color:var(--muted);margin-right:2px;}
.ip-opt{
  height:26px;padding:0 9px;border-radius:6px;border:1px solid var(--line);
  background:var(--panel-2);color:var(--ink);font-size:12px;cursor:pointer;
}
.ip-opt:hover{border-color:var(--accent);color:var(--accent);}
.ip-opt.active{background:var(--accent);border-color:var(--accent);color:#fff;}

.block-grip,.block-del{
  position:absolute;left:-32px;width:22px;height:22px;border-radius:5px;
  border:none;background:transparent;color:var(--muted);cursor:pointer;
  display:flex;align-items:center;justify-content:center;font-size:13px;line-height:1;
  opacity:0;transition:opacity .15s;padding:0;touch-action:none;z-index:4;
}
.block-grip{top:5px;letter-spacing:-2px;font-size:12px;cursor:grab;}
.block-del{top:29px;font-size:15px;}
.block:hover .block-grip,.block:hover .block-del,
.block:focus-within .block-grip,.block:focus-within .block-del{opacity:.75;}
.block-grip:hover,.block-del:hover{background:var(--panel-2);color:var(--accent);opacity:1;}
.block.dragging{opacity:.75;z-index:9;}
.block.dragging .block-text{pointer-events:none;}
.drop-line{height:3px;border-radius:2px;background:var(--accent);margin:2px 0;opacity:.85;}

.page-tail{padding-top:6px;}
.ghost-btn{
  border:1px dashed var(--line);background:transparent;color:var(--muted);
  font-size:12px;padding:6px 12px;border-radius:18px;cursor:pointer;
}
.ghost-btn:hover{color:var(--accent);border-color:var(--accent);}

/* ---------- 墨迹层 ---------- */
.ink{
  position:absolute;left:0;top:0;width:100%;height:100%;z-index:3;
  pointer-events:none;touch-action:none;
}
.ink.active{pointer-events:auto;cursor:crosshair;}
.page.draw-mode .block-text{user-select:none;-webkit-user-select:none;}

/* ---------- 浮层 / 菜单 / 提示 ---------- */
.ctx-menu{
  position:fixed;z-index:60;min-width:150px;background:var(--panel);
  border:1px solid var(--line);border-radius:9px;box-shadow:0 10px 30px rgba(0,0,0,.16);
  padding:5px;display:flex;flex-direction:column;gap:2px;
}
.ctx-item{
  text-align:left;border:none;background:transparent;padding:8px 10px;border-radius:6px;
  font-size:13px;cursor:pointer;color:var(--ink);
}
.ctx-item:hover{background:var(--accent-soft);}
.ctx-item.danger{color:#d9463e;}
.ctx-item.danger:hover{background:rgba(217,70,62,.1);}

.modal{
  position:fixed;inset:0;z-index:70;background:rgba(20,18,14,.42);
  display:flex;align-items:center;justify-content:center;padding:20px;
  backdrop-filter:blur(2px);
}
.modal[hidden]{display:none;}
.modal-card{
  width:100%;max-width:560px;max-height:82vh;overflow:hidden;
  background:var(--panel);border-radius:14px;box-shadow:0 24px 60px rgba(0,0,0,.3);
  display:flex;flex-direction:column;
}
.modal-head{display:flex;align-items:center;justify-content:space-between;padding:14px 16px;border-bottom:1px solid var(--line);}
.modal-head h3{margin:0;font-size:15px;font-weight:600;}
.modal-body{padding:16px 18px 22px;overflow-y:auto;font-size:13.5px;line-height:1.75;}
.modal-body h4{margin:14px 0 6px;font-size:13px;color:var(--accent);}
.modal-body ul{margin:0;padding-left:18px;}
.modal-body li{margin:3px 0;}
.modal-body code{background:var(--panel-2);padding:1px 5px;border-radius:4px;font-size:12px;}
.modal-body kbd{
  display:inline-block;padding:1px 6px;border:1px solid var(--line);border-radius:4px;
  background:var(--panel-2);font-size:12px;font-family:inherit;
}

.toast{
  position:fixed;left:50%;bottom:calc(26px + env(safe-area-inset-bottom));transform:translateX(-50%);
  background:rgba(30,28,24,.92);color:#fff;padding:9px 16px;border-radius:20px;
  font-size:13px;z-index:80;max-width:80vw;text-align:center;
}
.toast[hidden]{display:none;}

.sync-banner{
  position:fixed;left:50%;bottom:calc(70px + env(safe-area-inset-bottom));transform:translateX(-50%);
  background:var(--accent);color:#fff;padding:8px 14px;border-radius:20px;
  font-size:12.5px;z-index:75;box-shadow:0 8px 24px rgba(0,0,0,.2);
  display:flex;align-items:center;gap:10px;cursor:pointer;white-space:nowrap;
}
.sync-banner button{
  border:1px solid rgba(255,255,255,.5);background:transparent;color:#fff;
  border-radius:14px;padding:3px 10px;font-size:12px;cursor:pointer;
}

/* ---------- 移动端 ---------- */
@media (max-width: 820px){
  .only-mobile{display:inline-flex;}
  .brand-sub{display:none;}
  .sidebar{
    position:fixed;left:0;top:0;bottom:0;width:min(86vw,320px);
    padding-top:env(safe-area-inset-top);
    transform:translateX(-102%);transition:transform .22s ease;
    box-shadow:12px 0 40px rgba(0,0,0,.18);
  }
  .sidebar.open{transform:translateX(0);}
  .sidebar-mask{
    position:fixed;inset:0;background:rgba(0,0,0,.3);z-index:15;
  }
  .scroll{padding:8px;}
  .page-inner{padding:30px 20px 42vh 38px;}
  .page-title{font-size:21px;}
  .page-meta{margin-bottom:14px;}
  .block-text{font-size:15.5px;}
  .block-grip,.block-del{left:-30px;width:20px;height:20px;opacity:.5;}
  .block-grip{top:4px;}
  .block-del{top:26px;}
  .tool{width:36px;height:36px;}
  .toolbar{padding:0 8px;gap:6px;}
  .size-group input[type=range]{width:52px;}
  .pr-menu{opacity:.7;}
  .save-state{padding:4px 8px;font-size:11px;}
  .sync-chip{height:24px;padding:0 7px;font-size:11px;max-width:92px;}
  .crumbs{display:none;}
}
@media (hover:none){
  .block-grip,.block-del{opacity:.5;}
  .img-resize{opacity:.75;}
}

/* ---------- 打印 / PDF ---------- */
@media print{
  .topbar,.sidebar,.toolbar,.page-tail,.block-grip,.block-del,.toast,.sync-banner,.modal,.sync-chip,.paper-panel,.img-resize,.img-panel{display:none !important;}
  body{background:#fff;}
  .scroll{overflow:visible;padding:0;background:#fff;}
  .page{
    box-shadow:none;border-radius:0;max-width:none;margin:0;min-height:auto;
    -webkit-print-color-adjust:exact;print-color-adjust:exact;
  }
  .page-inner{padding:0 0 20px 0;}
}