/* =====================================================================
   MarkForge · styles.css
   Author: MarkSkecher
   ===================================================================== */

:root{
  --bg:#eef0f4;
  --panel:#ffffff;
  --panel-2:#f7f8fa;
  --panel-3:#f1f2f6;
  --border:#e3e5ea;
  --border-strong:#cfd3db;
  --text:#1a1c21;
  --text-2:#5a6070;
  --text-3:#8d93a1;
  --accent:#4b7bff;
  --accent-hover:#3a6cf5;
  --accent-soft:rgba(75,123,255,.12);
  --hover:rgba(20,25,45,.055);
  --active:rgba(20,25,45,.1);
  --shadow-sm:0 1px 2px rgba(20,28,55,.06);
  --shadow:0 8px 28px rgba(20,28,55,.13), 0 2px 6px rgba(20,28,55,.07);
  --shadow-lg:0 24px 60px rgba(20,28,55,.22), 0 8px 20px rgba(20,28,55,.12);
  --editor-bg:#ffffff;
  --preview-bg:#ffffff;
  --code-bg:#f5f6f9;
  --scrollbar:rgba(0,0,0,.16);
  --scrollbar-hover:rgba(0,0,0,.28);
  --ok:#20b26c;
  --ripple:rgba(0,0,0,.14);
  --fs:13.5px;
  --lh:1.75;
}
[data-theme="dark"]{
  --bg:#101216;
  --panel:#1a1d23;
  --panel-2:#1f232a;
  --panel-3:#242830;
  --border:#2a2f38;
  --border-strong:#3b424e;
  --text:#e7e9ee;
  --text-2:#a0a7b4;
  --text-3:#6d7482;
  --accent-hover:#71a0ff;
  --accent-soft:rgba(91,140,255,.16);
  --hover:rgba(255,255,255,.06);
  --active:rgba(255,255,255,.1);
  --shadow-sm:0 1px 2px rgba(0,0,0,.3);
  --shadow:0 10px 34px rgba(0,0,0,.5), 0 2px 8px rgba(0,0,0,.35);
  --shadow-lg:0 30px 70px rgba(0,0,0,.65), 0 10px 26px rgba(0,0,0,.45);
  --editor-bg:#1a1d23;
  --preview-bg:#1a1d23;
  --code-bg:#15181d;
  --scrollbar:rgba(255,255,255,.14);
  --scrollbar-hover:rgba(255,255,255,.26);
  --ok:#3ddc97;
  --ripple:rgba(255,255,255,.18);
}

*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  background:var(--bg);color:var(--text);
  font-size:13px;line-height:1.5;
  overflow:hidden;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  transition:background .3s ease,color .3s ease;
}
::-webkit-scrollbar{width:11px;height:11px}
::-webkit-scrollbar-track{background:transparent}
::-webkit-scrollbar-thumb{
  background:var(--scrollbar);border-radius:8px;border:3px solid transparent;background-clip:content-box;
}
::-webkit-scrollbar-thumb:hover{background:var(--scrollbar-hover);background-clip:content-box}
::-webkit-scrollbar-corner{background:transparent}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit;position:relative;overflow:hidden}
button:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
kbd{
  font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:10.5px;
  color:var(--text-3);background:var(--panel-3);border:1px solid var(--border);
  border-radius:4px;padding:1px 5px;line-height:1.5;white-space:nowrap;
}

.ripple{
  position:absolute;border-radius:50%;pointer-events:none;
  background:currentColor;opacity:.22;transform:scale(0);
  animation:rippleAnim .6s cubic-bezier(.2,.6,.3,1) forwards;
}
@keyframes rippleAnim{to{transform:scale(1);opacity:0}}

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

/* ─── 菜单栏 ─── */
.menubar{
  height:46px;flex:none;display:flex;align-items:center;gap:2px;
  padding:0 12px;background:var(--panel);border-bottom:1px solid var(--border);
  position:relative;z-index:60;
  animation:slideDown .4s cubic-bezier(.2,.8,.3,1);
}
@keyframes slideDown{from{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:none}}

.brand{display:flex;align-items:center;gap:10px;padding-right:16px;user-select:none}
.brand-mark{
  width:30px;height:30px;display:grid;place-items:center;
  color:var(--accent);
  background:none;box-shadow:none;border-radius:0;
  transition:transform .35s cubic-bezier(.2,1.4,.4,1);
}
.brand:hover .brand-mark{transform:rotate(-8deg) scale(1.08)}
.brand-mark svg{width:22px;height:22px}
.brand-text{display:flex;flex-direction:column;line-height:1.1}
.brand-name{font-weight:700;font-size:14px;letter-spacing:.1px}
.brand-author{font-size:10px;color:var(--text-3);font-weight:500;letter-spacing:.3px;margin-top:1px}

.menu{display:flex;gap:1px}
.menu-item{position:relative}
.menu-btn{padding:6px 12px;border-radius:8px;font-size:13px;color:var(--text-2);transition:background .15s,color .15s}
.menu-btn:hover,.menu-item.open .menu-btn{background:var(--hover);color:var(--text)}
.menu-item.open .menu-btn{background:var(--accent-soft);color:var(--accent)}

.dropdown{
  position:absolute;top:calc(100% + 8px);left:0;min-width:236px;
  background:var(--panel);border:1px solid var(--border);border-radius:12px;
  box-shadow:var(--shadow-lg);padding:6px;display:none;z-index:80;
  transform-origin:top left;
}
.menu-item.open .dropdown{display:block;animation:dropIn .18s cubic-bezier(.2,1.1,.4,1)}
@keyframes dropIn{from{opacity:0;transform:scale(.96) translateY(-6px)}to{opacity:1;transform:none}}
.dd-item{
  display:flex;align-items:center;justify-content:space-between;gap:24px;
  width:100%;padding:8px 11px;border-radius:7px;font-size:12.8px;
  color:var(--text);text-align:left;transition:background .12s,color .12s;
}
.dd-item:hover{background:var(--accent);color:#fff}
.dd-item:hover kbd{background:rgba(255,255,255,.22);color:#fff;border-color:transparent}
.dd-sep{height:1px;background:var(--border);margin:5px 8px}

.menubar-right{margin-left:auto;display:flex;align-items:center;gap:6px}
.icon-btn{
  width:32px;height:32px;border-radius:9px;display:grid;place-items:center;
  color:var(--text-2);transition:background .15s,color .15s,transform .12s;
}
.icon-btn:hover{background:var(--hover);color:var(--text);transform:translateY(-1px)}
.icon-btn:active{transform:translateY(0) scale(.94)}
.icon-btn.active{background:var(--accent-soft);color:var(--accent)}
.icon-btn svg{width:17px;height:17px;position:relative;z-index:1}
a.icon-btn{text-decoration:none}

/* ─── 工具栏 ─── */
.toolbar{
  flex:none;display:flex;align-items:center;gap:3px;padding:7px 12px;
  background:var(--panel-2);border-bottom:1px solid var(--border);
  overflow-x:auto;scrollbar-width:none;
  animation:fadeIn .5s ease .05s both;
}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}
.toolbar::-webkit-scrollbar{display:none}
.tbtn{
  width:32px;height:32px;border-radius:9px;display:grid;place-items:center;
  color:var(--text-2);flex:none;transition:background .15s,color .15s,transform .12s;
}
.tbtn:hover{background:var(--hover);color:var(--text);transform:translateY(-1px)}
.tbtn:active{transform:translateY(0) scale(.92)}
.tbtn svg{width:17px;height:17px;fill:none;stroke:currentColor;stroke-width:1.6;
  stroke-linecap:round;stroke-linejoin:round;position:relative;z-index:1}
.tsep{width:1px;height:20px;background:var(--border);margin:0 7px;flex:none}
.tlabel{font-size:11.5px;color:var(--text-3);padding:0 5px;flex:none;font-weight:500;
  transition:color .2s,opacity .3s}

/* ─── 工作区 ─── */
.workspace{flex:1;display:flex;min-height:0;background:var(--bg)}

/* ─── 侧栏 ─── */
.sidebar{
  flex:none;width:232px;background:var(--panel);display:flex;flex-direction:column;
  overflow:hidden;transition:width .26s cubic-bezier(.4,.1,.2,1),opacity .2s;
}
.sidebar.left{border-right:1px solid var(--border)}
.sidebar.right{border-left:1px solid var(--border);width:246px}
.sidebar.collapsed{width:0;opacity:0;border:none;pointer-events:none}

.panel-section{border-bottom:1px solid var(--border);padding:14px 14px 16px;flex:none}
.panel-section.grow{flex:1;min-height:0;display:flex;flex-direction:column;border-bottom:none;overflow:hidden}
.panel-title{
  font-size:10.5px;font-weight:700;letter-spacing:.9px;text-transform:uppercase;
  color:var(--text-3);margin-bottom:10px;display:flex;align-items:center;gap:6px;
  white-space:nowrap;
}
.panel-title svg{width:12px;height:12px}

.tool-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:5px}
.tool{
  aspect-ratio:1;border-radius:9px;display:grid;place-items:center;
  color:var(--text-2);transition:background .15s,color .15s,transform .12s;
}
.tool:hover{background:var(--accent-soft);color:var(--accent);transform:translateY(-1px)}
.tool:active{transform:translateY(0) scale(.9)}
.tool svg{width:16px;height:16px;fill:none;stroke:currentColor;stroke-width:1.6;
  stroke-linecap:round;stroke-linejoin:round;position:relative;z-index:1}

.outline{flex:1;overflow-y:auto;margin:-3px -6px;padding:0 6px;overscroll-behavior:contain}
.outline-item{
  display:flex;align-items:center;gap:8px;padding:5px 8px;border-radius:7px;
  cursor:pointer;color:var(--text-2);font-size:12.3px;white-space:nowrap;
  overflow:hidden;text-overflow:ellipsis;transition:background .15s,color .15s,transform .12s;
}
.outline-item:hover{background:var(--hover);color:var(--text);transform:translateX(2px)}
.outline-item .dot{width:4px;height:4px;border-radius:50%;background:var(--text-3);flex:none;
  transition:background .15s,transform .15s}
.outline-item:hover .dot{transform:scale(1.4)}
.outline-item.lv1{font-weight:650;color:var(--text);padding-left:8px;font-size:12.6px}
.outline-item.lv1 .dot{background:var(--accent);width:5px;height:5px}
.outline-item.lv2{padding-left:16px}
.outline-item.lv3{padding-left:24px;font-size:12px}
.outline-item.lv4{padding-left:32px;font-size:12px;color:var(--text-3)}
.outline-item.lv5{padding-left:40px;font-size:11.6px;color:var(--text-3)}
.outline-item.lv6{padding-left:48px;font-size:11.6px;color:var(--text-3)}
.outline .empty{color:var(--text-3);font-size:12px;padding:10px 8px;font-style:italic}

.stat-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-bottom:10px}
.stat-cell{
  background:var(--panel-2);border:1px solid var(--border);border-radius:9px;
  padding:9px 10px;display:flex;flex-direction:column;gap:2px;
  transition:background .15s,border-color .15s,transform .15s;
}
.stat-cell:hover{background:var(--accent-soft);border-color:transparent;transform:translateY(-1px)}
.stat-v{font-size:16px;font-weight:700;color:var(--text);font-variant-numeric:tabular-nums;
  letter-spacing:-.02em;line-height:1.1}
.stat-k{font-size:10.5px;color:var(--text-3);letter-spacing:.3px}
.stat-row{display:flex;justify-content:space-between;align-items:center;padding:3.5px 0;font-size:12.3px}
.stat-row .k{color:var(--text-3)}
.stat-row .v{color:var(--text);font-weight:600;font-variant-numeric:tabular-nums}

.segmented{
  display:flex;background:var(--panel-3);border:1px solid var(--border);
  border-radius:10px;padding:3px;gap:2px;position:relative;
}
.segmented button{
  flex:1;padding:6px 8px;border-radius:7px;font-size:11.8px;color:var(--text-2);
  transition:background .2s,color .2s,box-shadow .2s,transform .15s;white-space:nowrap;
}
.segmented button:hover{color:var(--text)}
.segmented button.active{
  background:var(--panel);color:var(--text);font-weight:600;
  box-shadow:0 1px 3px rgba(0,0,0,.1),0 0 0 1px var(--border) inset;
}
[data-theme="dark"] .segmented button.active{background:#333944;box-shadow:0 1px 3px rgba(0,0,0,.3)}

.mini-segmented{
  display:flex;background:var(--panel-3);border:1px solid var(--border);
  border-radius:8px;padding:2.5px;gap:2px;
}
.mini-segmented button{
  padding:4.5px 9px;border-radius:6px;font-size:11px;color:var(--text-2);
  transition:background .2s,color .2s,box-shadow .2s;white-space:nowrap;
}
.mini-segmented button:hover{color:var(--text)}
.mini-segmented button.active{
  background:var(--panel);color:var(--text);font-weight:600;
  box-shadow:0 1px 3px rgba(0,0,0,.1);
}
[data-theme="dark"] .mini-segmented button.active{background:#333944}

.accent-swatches{display:flex;gap:8px;flex-wrap:wrap}
.swatch{
  width:26px;height:26px;border-radius:8px;background:var(--sw);
  box-shadow:0 2px 6px rgba(0,0,0,.15),0 0 0 1px rgba(0,0,0,.04) inset;
  transition:transform .18s cubic-bezier(.3,1.4,.5,1),box-shadow .18s;
}
.swatch:hover{transform:translateY(-2px) scale(1.06)}
.swatch:active{transform:scale(.94)}
.swatch.active{
  box-shadow:0 0 0 2px var(--panel),0 0 0 4px var(--sw),0 2px 8px rgba(0,0,0,.2);
}

.field-row{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:5px 0;font-size:12.3px}
.field-label{color:var(--text-2);white-space:nowrap}

.switch-row{display:flex;align-items:center;justify-content:space-between;padding:6px 0;font-size:12.3px;color:var(--text-2);
  cursor:pointer}
.switch-row:hover{color:var(--text)}
.switch{
  position:relative;width:36px;height:20px;border-radius:20px;background:var(--border-strong);
  transition:background .24s cubic-bezier(.4,.1,.2,1);flex:none;
}
.switch::after{
  content:"";position:absolute;top:2.5px;left:2.5px;width:15px;height:15px;border-radius:50%;
  background:#fff;transition:transform .26s cubic-bezier(.4,1.5,.5,1);
  box-shadow:0 1px 3px rgba(0,0,0,.3);
}
.switch.on{background:var(--accent)}
.switch.on::after{transform:translateX(16px)}

.slider-row{padding:7px 0}
.slider-row .lbl{display:flex;justify-content:space-between;font-size:12.3px;color:var(--text-3);margin-bottom:7px}
.slider-row .lbl b{color:var(--text);font-weight:600;font-variant-numeric:tabular-nums}
input[type=range]{
  -webkit-appearance:none;appearance:none;width:100%;height:4px;border-radius:3px;
  background:var(--border-strong);outline:none;cursor:pointer;
  transition:background .15s;
}
input[type=range]::-webkit-slider-thumb{
  -webkit-appearance:none;width:15px;height:15px;border-radius:50%;background:var(--accent);
  border:2.5px solid var(--panel);box-shadow:0 1px 4px rgba(0,0,0,.28);
  cursor:grab;transition:transform .15s,box-shadow .15s;
}
input[type=range]::-webkit-slider-thumb:hover{transform:scale(1.15);box-shadow:0 2px 8px var(--accent-soft)}
input[type=range]:active::-webkit-slider-thumb{cursor:grabbing;transform:scale(1.05)}
input[type=range]::-moz-range-thumb{
  width:15px;height:15px;border-radius:50%;background:var(--accent);
  border:2.5px solid var(--panel);box-shadow:0 1px 4px rgba(0,0,0,.28);
  cursor:grab;transition:transform .15s;
}
input[type=range]::-moz-range-thumb:hover{transform:scale(1.15)}

.reset-btn{
  width:100%;margin-top:14px;padding:9px;border-radius:9px;
  background:var(--panel-2);border:1px solid var(--border);
  color:var(--text-2);font-size:12.3px;font-weight:500;
  transition:background .15s,color .15s,border-color .15s,transform .12s;
}
.reset-btn:hover{background:var(--accent-soft);color:var(--accent);border-color:transparent}
.reset-btn:active{transform:scale(.98)}

.main{flex:1;display:flex;flex-direction:column;min-width:0;background:var(--bg)}

.tabbar{
  height:39px;flex:none;display:flex;align-items:center;gap:8px;padding:0 12px;
  background:var(--panel-2);border-bottom:1px solid var(--border);
}
.tab{
  display:flex;align-items:center;gap:8px;padding:6px 15px;border-radius:9px 9px 0 0;
  background:var(--panel);border:1px solid var(--border);border-bottom:none;
  margin-bottom:-1px;height:33px;font-size:12.5px;color:var(--text);
  box-shadow:0 -2px 0 var(--accent) inset;
  transition:box-shadow .2s;
}
.tab .dot{
  width:6px;height:6px;border-radius:50%;background:var(--accent);opacity:0;
  transition:opacity .24s,transform .24s;transform:scale(.6);
}
.tab.dirty .dot{opacity:1;transform:scale(1);animation:pulseDot 1.6s ease-in-out infinite}
@keyframes pulseDot{0%,100%{transform:scale(1);opacity:1}50%{transform:scale(1.25);opacity:.65}}
.tab-actions{margin-left:auto;display:flex;gap:3px;align-items:center}

.split{flex:1;display:flex;min-height:0;position:relative}
.pane{flex:1;min-width:0;display:flex;flex-direction:column;background:var(--editor-bg);
  transition:background .3s ease}
.pane.preview-pane{background:var(--preview-bg);border-left:1px solid var(--border)}

.divider{
  flex:none;width:7px;cursor:col-resize;background:transparent;position:relative;z-index:5;
  margin:0 -3px;display:flex;align-items:center;justify-content:center;
}
.divider-handle{
  width:3px;height:36px;border-radius:3px;background:transparent;
  transition:background .2s,height .25s cubic-bezier(.3,1.4,.5,1);
}
.divider:hover .divider-handle{background:var(--accent);height:56px}
.divider.dragging .divider-handle{background:var(--accent);height:80px}

.pane-head{
  height:32px;flex:none;display:flex;align-items:center;gap:7px;padding:0 15px;
  font-size:10.5px;font-weight:700;letter-spacing:.7px;text-transform:uppercase;
  color:var(--text-3);background:var(--panel-2);border-bottom:1px solid var(--border);
  user-select:none;
}
.pane-head svg{width:13px;height:13px;fill:none;stroke:currentColor;stroke-width:1.8}

.editor-wrap{flex:1;display:flex;min-height:0;overflow:hidden;position:relative}
.gutter{
  flex:none;min-width:56px;padding:24px 12px 80px 15px;text-align:right;
  color:var(--text-3);background:var(--panel-2);border-right:1px solid var(--border);
  font-family:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,monospace;
  font-size:var(--fs);line-height:var(--lh);overflow:hidden;user-select:none;
  font-variant-numeric:tabular-nums;
  contain:strict;
}
.gutter > div{transition:color .2s}
#editor{
  flex:1;border:none;outline:none;resize:none;background:var(--editor-bg);color:var(--text);
  font-family:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,"Courier New",monospace;
  font-size:var(--fs);line-height:var(--lh);
  padding:24px 28px 80px;tab-size:2;caret-color:var(--accent);
  transition:background .3s ease,color .3s ease;
  overscroll-behavior:contain;
  will-change:scroll-position;
}
#editor::placeholder{color:var(--text-3)}
#editor::selection{background:var(--accent-soft)}
#editor.font-sans{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif}
#editor.font-serif{font-family:Georgia,"Songti SC","SimSun","Times New Roman",serif}

.preview{
  flex:1;overflow-y:auto;padding:26px 42px 100px;
  font-size:15px;line-height:1.78;color:var(--text);
  max-width:100%;margin:0 auto;width:100%;
  overscroll-behavior:contain;
  will-change:scroll-position;
}
.preview>*:first-child{margin-top:0}
.preview h1,.preview h2,.preview h3,.preview h4,.preview h5,.preview h6{
  font-weight:680;line-height:1.35;margin:1.7em 0 .65em;letter-spacing:-.01em;
  scroll-margin-top:16px;
}
.preview h1{font-size:1.95em;border-bottom:1px solid var(--border);padding-bottom:.35em;margin-top:1.2em}
.preview h2{font-size:1.5em;border-bottom:1px solid var(--border);padding-bottom:.3em}
.preview h3{font-size:1.24em}
.preview h4{font-size:1.08em}
.preview h5{font-size:.95em;color:var(--text-2)}
.preview h6{font-size:.88em;color:var(--text-3);text-transform:uppercase;letter-spacing:.6px}
.preview p{margin:.85em 0}
.preview a{color:var(--accent);text-decoration:none;border-bottom:1px solid transparent;
  transition:border-color .15s,color .15s}
.preview a:hover{border-bottom-color:var(--accent)}
.preview strong{font-weight:680}
.preview mark{background:rgba(255,213,0,.35);color:inherit;padding:.1em .25em;border-radius:3px}
[data-theme="dark"] .preview mark{background:rgba(255,213,0,.22)}
.preview ul,.preview ol{padding-left:1.6em;margin:.85em 0}
.preview li{margin:.3em 0}
.preview li::marker{color:var(--text-3)}
.preview blockquote{
  margin:1.1em 0;padding:.35em 0 .35em 1.15em;
  border-left:3px solid var(--accent);color:var(--text-2);
  background:linear-gradient(90deg,var(--accent-soft),transparent 70%);
  border-radius:0 6px 6px 0;
}
.preview blockquote p{margin:.35em 0}
.preview code{
  font-family:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,monospace;
  font-size:.87em;background:var(--code-bg);padding:.17em .42em;border-radius:5px;
  border:1px solid var(--border);color:#e0559b;
}
[data-theme="dark"] .preview code{color:#ff8bbf}
.preview pre{
  position:relative;background:var(--code-bg);border:1px solid var(--border);
  border-radius:11px;padding:16px 18px;overflow-x:auto;margin:1.1em 0;
}
.preview pre code{background:none;border:none;padding:0;color:var(--text);font-size:.86em;line-height:1.65}
.preview pre[data-lang]::before{
  content:attr(data-lang);position:absolute;top:9px;right:13px;font-size:10px;
  color:var(--text-3);text-transform:uppercase;letter-spacing:.7px;font-weight:600;
}
.preview table{border-collapse:collapse;width:100%;margin:1.2em 0;font-size:.94em;display:block;overflow-x:auto}
.preview th,.preview td{border:1px solid var(--border);padding:9px 14px}
.preview th{background:var(--panel-2);font-weight:650;text-align:left}
.preview tr:nth-child(even) td{background:var(--panel-2)}
.preview tr{transition:background .15s}
.preview tr:hover td{background:var(--accent-soft)}
.preview img{max-width:100%;border-radius:10px;display:block;margin:1em 0;
  box-shadow:var(--shadow-sm)}
.preview hr{border:none;border-top:1px solid var(--border);margin:2em 0}
.preview .md-task{display:flex;align-items:flex-start;gap:9px;list-style:none}
.preview .md-task input{margin-top:.42em;accent-color:var(--accent);flex:none;
  width:15px;height:15px}
.preview details{
  background:var(--panel-2);border:1px solid var(--border);border-radius:10px;
  padding:12px 16px;margin:1em 0;
}
.preview summary{cursor:pointer;font-weight:600;color:var(--text);
  list-style:none;user-select:none;display:flex;align-items:center;gap:8px}
.preview summary::-webkit-details-marker{display:none}
.preview summary::before{
  content:"";width:0;height:0;border-left:5px solid currentColor;
  border-top:4px solid transparent;border-bottom:4px solid transparent;
  transition:transform .2s;color:var(--text-3);
}
.preview details[open] summary::before{transform:rotate(90deg)}

.workspace[data-view="editor"] .preview-pane,
.workspace[data-view="editor"] .divider{display:none}
.workspace[data-view="preview"] .editor-pane,
.workspace[data-view="preview"] .divider{display:none}

/* ─── 语法高亮 Token ─── */
.preview pre code .tok-com  { color:#8a8f98; font-style:italic; }
.preview pre code .tok-str  { color:#0a8f4c; }
.preview pre code .tok-kw   { color:#a626a4; }
.preview pre code .tok-num  { color:#986801; }
.preview pre code .tok-fn   { color:#4078f2; }
.preview pre code .tok-op   { color:#555b66; }
.preview pre code .tok-tag  { color:#e45649; }
.preview pre code .tok-attr { color:#986801; }
.preview pre code .tok-prop { color:#4078f2; }
.preview pre code .tok-bool { color:#986801; }
.preview pre code .tok-key  { color:#4078f2; }

[data-theme="dark"] .preview pre code .tok-com  { color:#5c6370; }
[data-theme="dark"] .preview pre code .tok-str  { color:#98c379; }
[data-theme="dark"] .preview pre code .tok-kw   { color:#c678dd; }
[data-theme="dark"] .preview pre code .tok-num  { color:#d19a66; }
[data-theme="dark"] .preview pre code .tok-fn   { color:#61afef; }
[data-theme="dark"] .preview pre code .tok-op   { color:#abb2bf; }
[data-theme="dark"] .preview pre code .tok-tag  { color:#e06c75; }
[data-theme="dark"] .preview pre code .tok-attr { color:#d19a66; }
[data-theme="dark"] .preview pre code .tok-prop { color:#61afef; }
[data-theme="dark"] .preview pre code .tok-bool { color:#d19a66; }
[data-theme="dark"] .preview pre code .tok-key  { color:#61afef; }

/* ─── 状态栏 ─── */
.statusbar{
  height:28px;flex:none;display:flex;align-items:center;gap:16px;padding:0 16px;
  background:var(--panel);border-top:1px solid var(--border);
  font-size:11.5px;color:var(--text-3);user-select:none;
}
.status-item{display:flex;align-items:center;gap:5px;white-space:nowrap}
.status-item b{color:var(--text-2);font-weight:600;font-variant-numeric:tabular-nums}
.status-sep{width:1px;height:12px;background:var(--border)}
.status-right{margin-left:auto;display:flex;align-items:center;gap:14px}
.saved-dot{
  width:6px;height:6px;border-radius:50%;background:var(--ok);
  transition:background .3s,transform .3s;
}
.saved-dot.saving{background:#f5a623;animation:pulseDot 1.2s ease-in-out infinite}

/* ─── 命令面板 ─── */
.cmdk-overlay{
  position:fixed;inset:0;background:rgba(10,14,25,.42);
  backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px);
  display:none;justify-content:center;align-items:flex-start;
  padding-top:14vh;z-index:300;
}
.cmdk-overlay.show{display:flex;animation:fadeIn .18s ease}
.cmdk{
  width:min(580px,92vw);background:var(--panel);border:1px solid var(--border);
  border-radius:14px;box-shadow:var(--shadow-lg);overflow:hidden;
  animation:cmdkIn .22s cubic-bezier(.2,1.1,.4,1);
}
@keyframes cmdkIn{from{opacity:0;transform:scale(.96) translateY(-12px)}to{opacity:1;transform:none}}
.cmdk-input-wrap{
  display:flex;align-items:center;gap:11px;padding:15px 18px;
  border-bottom:1px solid var(--border);
}
.cmdk-input-wrap svg{width:17px;height:17px;color:var(--text-3);flex:none}
.cmdk-input-wrap input{
  flex:1;border:none;outline:none;background:none;color:var(--text);
  font-size:14.5px;font-family:inherit;
}
.cmdk-input-wrap input::placeholder{color:var(--text-3)}
.cmdk-list{max-height:380px;overflow-y:auto;padding:7px;overscroll-behavior:contain}
.cmdk-item{
  display:flex;align-items:center;gap:11px;padding:9px 12px;border-radius:9px;
  cursor:pointer;font-size:13px;color:var(--text);
  transition:background .1s,transform .1s;
}
.cmdk-item:hover,.cmdk-item.active{background:var(--accent-soft);color:var(--accent)}
.cmdk-item.active{transform:translateX(2px)}
.cmdk-item .cmd-icon{
  width:26px;height:26px;border-radius:7px;display:grid;place-items:center;
  background:var(--panel-3);color:var(--text-2);flex:none;
}
.cmdk-item.active .cmd-icon,.cmdk-item:hover .cmd-icon{background:var(--accent);color:#fff}
.cmdk-item .cmd-icon svg{width:14px;height:14px;fill:none;stroke:currentColor;stroke-width:1.8;
  stroke-linecap:round;stroke-linejoin:round}
.cmdk-item .cmd-label{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.cmdk-item .cmd-cat{font-size:10.5px;color:var(--text-3);font-weight:600;
  letter-spacing:.4px;text-transform:uppercase}
.cmdk-item.active .cmd-cat,.cmdk-item:hover .cmd-cat{color:inherit;opacity:.65}
.cmdk-empty{padding:26px;text-align:center;color:var(--text-3);font-size:13px}

/* ─── 弹窗 ─── */
.overlay{
  position:fixed;inset:0;background:rgba(10,14,25,.45);
  backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px);
  display:none;place-items:center;z-index:200;padding:24px;
}
.overlay.show{display:grid;animation:fadeIn .18s ease}
.modal{
  background:var(--panel);border:1px solid var(--border);border-radius:16px;
  box-shadow:var(--shadow-lg);width:min(660px,100%);max-height:82vh;
  display:flex;flex-direction:column;
  animation:popIn .22s cubic-bezier(.3,1.3,.6,1);
}
@keyframes popIn{from{opacity:0;transform:scale(.94) translateY(10px)}to{opacity:1;transform:none}}
.modal-head{
  display:flex;align-items:center;justify-content:space-between;padding:17px 21px;
  border-bottom:1px solid var(--border);flex:none;
}
.modal-head h3{font-size:15px;font-weight:650}
.modal-close{
  width:30px;height:30px;border-radius:8px;display:grid;place-items:center;
  color:var(--text-2);font-size:20px;line-height:1;
  transition:background .15s,color .15s,transform .15s;
}
.modal-close:hover{background:var(--hover);color:var(--text);transform:rotate(90deg)}
.modal-body{padding:21px;overflow-y:auto;font-size:13.5px;line-height:1.78;color:var(--text-2)}
.modal-body h4{color:var(--text);font-size:13px;margin:18px 0 9px;font-weight:650}
.modal-body h4:first-child{margin-top:0}
.modal-body code{
  font-family:ui-monospace,Menlo,Consolas,monospace;font-size:12.3px;
  background:var(--code-bg);padding:2px 6px;border-radius:5px;border:1px solid var(--border);
  color:var(--text);
}
.modal-body table{width:100%;border-collapse:collapse;font-size:12.8px}
.modal-body td{padding:7px 9px;border-bottom:1px solid var(--border);vertical-align:top}
.modal-body td:first-child{width:220px}
.modal-body tr:last-child td{border-bottom:none}

/* ─── Toast ─── */
.toast-container{
  position:fixed;bottom:44px;left:50%;transform:translateX(-50%);
  display:flex;flex-direction:column;gap:9px;align-items:center;
  z-index:400;pointer-events:none;
}
.toast{
  display:flex;align-items:center;gap:9px;padding:10px 18px;border-radius:11px;
  background:var(--panel);border:1px solid var(--border);
  box-shadow:var(--shadow);font-size:12.8px;color:var(--text);
  font-weight:500;pointer-events:auto;
  animation:toastIn .32s cubic-bezier(.2,1.3,.4,1);
  max-width:440px;
}
.toast.out{animation:toastOut .28s ease forwards}
@keyframes toastIn{from{opacity:0;transform:translateY(16px) scale(.94)}to{opacity:1;transform:none}}
@keyframes toastOut{to{opacity:0;transform:translateY(10px) scale(.96)}}
.toast-icon{
  width:20px;height:20px;border-radius:50%;display:grid;place-items:center;flex:none;
  background:var(--accent-soft);color:var(--accent);
}
.toast.success .toast-icon{background:rgba(32,178,108,.14);color:var(--ok)}
.toast.warn .toast-icon{background:rgba(245,166,35,.16);color:#f5a623}
.toast-icon svg{width:12px;height:12px;stroke:currentColor;stroke-width:2.5;
  fill:none;stroke-linecap:round;stroke-linejoin:round}

/* ─── 关于页面 ─── */
.about-page{
  position:fixed;inset:0;z-index:250;
  background:var(--bg);
  display:none;overflow:hidden;
  opacity:0;
  transition:opacity .28s ease;
}
.about-page.show{display:block;opacity:1}
.about-page.show .about-scroll{animation:aboutIn .45s cubic-bezier(.2,.9,.3,1) both}
@keyframes aboutIn{
  from{opacity:0;transform:translateY(14px)}
  to{opacity:1;transform:none}
}

.about-scroll{
  height:100%;overflow-y:auto;
  padding:64px 28px 100px;
  overscroll-behavior:contain;
}
.about-inner{max-width:760px;margin:0 auto;}

.about-close{
  position:fixed;top:22px;right:26px;z-index:5;
  width:38px;height:38px;border-radius:11px;
  display:grid;place-items:center;
  color:var(--text-2);
  background:var(--panel);border:1px solid var(--border);
  box-shadow:var(--shadow-sm);
  transition:background .18s,color .18s,transform .22s cubic-bezier(.3,1.4,.5,1);
}
.about-close:hover{
  background:var(--accent);color:#fff;border-color:transparent;
  transform:rotate(90deg) scale(1.05);
}
.about-close svg{width:17px;height:17px}

.about-hero{text-align:center;margin-bottom:38px}
.about-glyph{
  width:72px;height:72px;margin:0 auto 22px;
  display:grid;place-items:center;
  color:var(--accent);
  border-radius:22px;
  background:var(--accent-soft);
  box-shadow:0 12px 32px -12px var(--accent);
  animation:glyphFloat 4.5s ease-in-out infinite;
}
@keyframes glyphFloat{
  0%,100%{transform:translateY(0)}
  50%{transform:translateY(-6px)}
}
.about-glyph svg{width:40px;height:40px}
.about-hero h1{
  font-size:38px;font-weight:750;letter-spacing:-.025em;
  background:linear-gradient(135deg,var(--text),var(--text-2));
  -webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;
  margin-bottom:8px;
}
.about-tag{color:var(--text-3);font-size:14px;letter-spacing:.1px;margin-bottom:18px}
.about-meta{display:flex;gap:9px;justify-content:center;flex-wrap:wrap}
.pill{
  display:inline-flex;align-items:center;
  padding:5px 13px;border-radius:99px;
  font-size:11.5px;font-weight:600;letter-spacing:.3px;
  color:var(--text-2);background:var(--panel);
  border:1px solid var(--border);
}
.pill-accent{color:var(--accent);background:var(--accent-soft);border-color:transparent;}

.about-lede{
  font-size:15.5px;line-height:1.85;color:var(--text-2);
  text-align:center;max-width:620px;margin:0 auto 46px;
}

.about-section{margin-bottom:44px}
.about-section h2{
  font-size:12px;font-weight:700;letter-spacing:1.3px;text-transform:uppercase;
  color:var(--text-3);margin-bottom:18px;text-align:center;
}

.about-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;}
.about-card{
  padding:20px 18px;
  background:var(--panel);
  border:1px solid var(--border);border-radius:14px;
  transition:transform .25s cubic-bezier(.3,1.3,.5,1),
             box-shadow .25s,border-color .25s;
}
.about-card:hover{
  transform:translateY(-4px);
  border-color:transparent;
  box-shadow:0 14px 36px -14px var(--accent);
}
.about-card-icon{
  width:34px;height:34px;border-radius:10px;
  display:grid;place-items:center;
  background:var(--accent-soft);color:var(--accent);
  margin-bottom:13px;
  transition:transform .3s cubic-bezier(.3,1.4,.5,1);
}
.about-card:hover .about-card-icon{transform:scale(1.1) rotate(-6deg)}
.about-card-icon svg{width:17px;height:17px}
.about-card h3{font-size:13.5px;font-weight:650;color:var(--text);margin-bottom:6px;}
.about-card p{font-size:12.3px;line-height:1.65;color:var(--text-3);}

.about-list{list-style:none;display:flex;flex-direction:column;gap:2px}
.about-list li{
  display:flex;justify-content:space-between;align-items:center;gap:16px;
  padding:12px 16px;border-radius:10px;
  background:var(--panel);border:1px solid var(--border);
  font-size:13px;
  transition:background .18s,transform .18s;
}
.about-list li:hover{background:var(--panel-2);transform:translateX(3px)}
.about-list li span:first-child{color:var(--text-3);font-weight:600;letter-spacing:.2px}
.about-list li span:last-child{color:var(--text-2);text-align:right}

.about-foot{text-align:center;padding-top:22px;border-top:1px solid var(--border)}
.about-foot p{font-size:13px;color:var(--text-2);margin:5px 0}
.about-foot b{color:var(--accent);font-weight:700}
.about-foot-dim{color:var(--text-3) !important;font-size:11.5px !important}

/* ─── 响应式 ─── */
@media (max-width:1080px){
  .sidebar.right{width:222px}
  .sidebar.left{width:212px}
}
@media (max-width:900px){
  .sidebar.right{display:none}
  .sidebar.left{width:196px}
  .brand-author{display:none}
}
@media (max-width:680px){
  .sidebar.left{display:none}
  .preview{padding:20px 22px 70px}
  #editor{padding:20px 16px 70px}
  .menu{display:none}
  .toolbar{padding:6px 8px}
  .about-grid{grid-template-columns:1fr}
  .about-hero h1{font-size:30px}
  .about-scroll{padding:52px 20px 80px}
}