*{box-sizing:border-box;margin:0;padding:0}
[hidden]{display:none!important}
:root{
  --bg:#fafafa;--card:#fff;--text:#18181b;--muted:#71717a;
  --border:#e4e4e7;--border-strong:#d4d4d8;
  --primary:#18181b;--primary-hover:#000;--accent:#2563eb;--accent-bg:#eff6ff;
  --danger:#dc2626;--danger-bg:#fef2f2;
  --sidebar-bg:#f7f7f8;--row-hover:#ececef;--row-active:#e4e4e7;
}
html,body{height:100%}
body{
  font-family:-apple-system,BlinkMacSystemFont,system-ui,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  background:var(--bg);color:var(--text);line-height:1.5;-webkit-font-smoothing:antialiased;
  display:flex;flex-direction:column;
}

header{
  display:flex;align-items:center;padding:8px 16px;
  border-bottom:1px solid var(--border);background:#fff;flex-shrink:0;height:48px;
}
.brand{display:flex;align-items:center;gap:8px;padding-right:16px;border-right:1px solid var(--border)}
.brand-icon{font-size:18px;color:var(--accent)}
.brand-name{font-size:14px;font-weight:600;letter-spacing:-.02em;color:var(--text)}
.header-main{flex:1;min-width:0;padding-left:16px;overflow:hidden}
.doc-title{font-size:13px;color:var(--muted);display:flex;align-items:center;gap:8px;white-space:nowrap}
.doc-title strong{color:var(--text);font-weight:600;font-size:14px}
.title-sep{color:var(--border-strong);font-size:12px}
.doc-title .file-path{color:var(--muted);font-family:ui-monospace,Menlo,monospace;font-size:12px}
.published-badge{
  font-size:10px;font-weight:500;color:#16a34a;background:#dcfce7;
  padding:2px 6px;border-radius:4px;letter-spacing:-.01em;
}
.project-rename-input{
  max-width:160px;font-size:14px;font-weight:600;
}
.toolbar{margin-left:auto;display:flex;gap:6px;align-items:center}
.status{font-size:12px;color:var(--muted);margin-right:8px;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:240px}
.status.err{color:var(--danger)}
.status.ok{color:#16a34a}

button,.btn{
  display:inline-flex;align-items:center;gap:6px;padding:6px 12px;font-size:12.5px;font-weight:500;
  line-height:1;border:1px solid transparent;border-radius:6px;cursor:pointer;
  transition:background .12s,border-color .12s,color .12s;font-family:inherit;text-decoration:none;color:var(--text);
}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-hover)}
.btn-primary:disabled{opacity:.5;cursor:wait}
.btn-ghost{background:#fff;color:var(--text);border-color:var(--border-strong)}
.btn-ghost:hover{background:#f4f4f5;border-color:#a1a1aa}

.workspace{flex:1;display:grid;grid-template-columns:260px 1fr;min-height:0}

/* 左栏 */
.sidebar{
  background:var(--sidebar-bg);border-right:1px solid var(--border);
  display:flex;flex-direction:column;min-height:0;
}
.sb-head{
  padding:10px 12px 8px;display:flex;align-items:center;gap:4px;
  border-bottom:1px solid var(--border);
}
.sb-title{font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);flex:1}
.sb-icon-btn{
  background:transparent;border:0;padding:2px 6px;font-size:14px;line-height:1;
  color:var(--muted);cursor:pointer;border-radius:4px;
}
.sb-icon-btn:hover{background:var(--row-hover);color:var(--text)}
.project-select{
  flex:1;min-width:0;padding:3px 8px;font-size:12.5px;font-weight:500;
  border:1px solid var(--border);border-radius:5px;background:#fff;color:var(--text);
  outline:none;cursor:pointer;font-family:inherit;
  margin-left:2px;
}
/* 新建项目按钮特殊样式，更紧凑 */
#newProjectBtn{
  padding:3px 6px;
  font-size:14px;
  height:24px;
  display:flex;
  align-items:center;
}
.project-select:focus{border-color:var(--accent)}
.project-select option{color:var(--text)}
.sb-head .row-del:hover{background:var(--danger-bg);color:var(--danger)}
.sb-list{
  flex:1;overflow-y:auto;padding:4px;position:relative;
  display:flex;flex-direction:column;
}
.sb-empty{padding:18px 14px;text-align:center;color:var(--muted);font-size:12px;line-height:1.6}
.sb-drop-hint{
  padding:24px 14px;text-align:center;color:var(--muted);font-size:12px;line-height:1.6;
  margin-top:auto;opacity:.6;pointer-events:none;user-select:none;
}
.sb-drop-hint .drop-icon{font-size:16px;margin-right:4px}

.files{padding:1px 0 4px}
.file-row{
  display:flex;align-items:center;gap:6px;padding:4px 8px;border-radius:4px;
  cursor:pointer;font-size:12.5px;font-family:ui-monospace,Menlo,monospace;
}
.file-row:hover{background:var(--row-hover)}
.file-row.active{background:var(--row-active)}
.file-row .ficon{flex-shrink:0;font-size:12px;width:16px;text-align:center;color:var(--muted)}
.file-row .fname{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.file-row .fdraft{
  color:#92400e;background:#fef3c7;font-size:9px;padding:0 4px;border-radius:2px;font-family:sans-serif;
}
.file-row .ferror{
  color:#b91c1c;background:#fee2e2;font-size:9px;padding:0 4px;border-radius:2px;font-family:sans-serif;
}
.file-row .fdel{
  background:transparent;border:0;color:var(--muted);font-size:12px;line-height:1;
  padding:2px 4px;border-radius:3px;opacity:0;cursor:pointer;flex-shrink:0;
}
.file-row:hover .fdel{opacity:1}
.file-row .fdel:hover{background:var(--danger-bg);color:var(--danger)}
.new-file-row{
  display:flex;align-items:center;gap:6px;padding:4px 8px;border-radius:4px;
  cursor:pointer;font-size:12px;color:var(--muted);
}
.new-file-row:hover{background:var(--row-hover);color:var(--text)}
.new-file-input,.rename-input{
  flex:1;min-width:0;padding:2px 6px;font-size:12.5px;font-family:ui-monospace,Menlo,monospace;
  border:1px solid var(--accent);border-radius:3px;outline:none;background:#fff;
}
.sb-icon-btn.import-btn{font-size:13px}
.files-empty{padding:6px 8px;color:var(--muted);font-style:italic;font-size:12px}
.proj-del-confirm{
  padding:6px 8px;font-size:12px;display:flex;align-items:center;gap:8px;
  color:var(--danger);background:var(--danger-bg);border-radius:4px;margin:4px;
}
.proj-del-confirm button{
  padding:2px 8px;font-size:11px;border-radius:3px;cursor:pointer;border:1px solid;
  font-family:inherit;font-weight:500;line-height:1.4;
}
.proj-del-confirm .del-yes{background:var(--danger);color:#fff;border-color:var(--danger)}
.proj-del-confirm .del-yes:hover{opacity:.85}
.proj-del-confirm .del-no{background:#fff;color:var(--text);border-color:var(--border-strong)}
.proj-del-confirm .del-no:hover{background:#f4f4f5}

/* 内容区 */
.pane-content{display:flex;flex-direction:column;min-width:0;min-height:0;background:#fff}
.pane-head{
  padding:6px 12px 6px 16px;font-size:11px;
  color:var(--muted);font-weight:500;background:#fafafa;border-bottom:1px solid var(--border);flex-shrink:0;
  display:flex;align-items:center;gap:8px;height:32px;
}
.pane-title{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-family:ui-monospace,Menlo,monospace;font-size:12px}
.pane-toggle{display:flex;background:var(--border);border-radius:5px;padding:2px;gap:2px;flex-shrink:0}
.toggle-btn{
  padding:2px 10px;font-size:11px;font-weight:500;border:0;border-radius:3px;
  background:transparent;color:var(--muted);cursor:pointer;line-height:1.4;
  transition:background .1s,color .1s;
}
.toggle-btn.active{background:#fff;color:var(--text);box-shadow:0 1px 2px rgba(0,0,0,.08)}
.toggle-btn:not(.active):hover{color:var(--text)}

.editor-area{flex:1;display:flex;flex-direction:column;min-height:0;overflow:hidden}
textarea#src{
  flex:1;border:0;padding:18px 22px;font-size:14px;line-height:1.65;
  font-family:ui-monospace,"SF Mono",Menlo,Monaco,Consolas,monospace;
  color:var(--text);background:#fff;resize:none;outline:none;min-height:0;
}
#cmEditor{flex:1;min-height:0;overflow:hidden}
#cmEditor .cm-editor{height:100%}
#cmEditor .cm-scroller{overflow:auto}
.editor-readonly{
  flex:1;display:flex;align-items:center;justify-content:center;color:var(--muted);font-size:13px;padding:40px;text-align:center;line-height:1.7;
}

.preview-area{flex:1;overflow:hidden;display:flex;flex-direction:column;min-height:0}
.preview-body{flex:1;overflow:auto;min-height:0}
.preview-md{padding:28px 32px}
.preview-md .md-body{max-width:760px;margin:0 auto}
.preview-iframe{width:100%;height:100%;border:0;background:#fff;display:block}
.preview-image-wrap{display:flex;align-items:center;justify-content:center;padding:24px;background:repeating-conic-gradient(#f4f4f5 0% 25%,#fff 0% 50%) 50% / 16px 16px;min-height:100%}
.preview-image-wrap img{max-width:100%;max-height:80vh;background:#fff;box-shadow:0 1px 4px rgba(0,0,0,.06);border-radius:4px}
.preview-code{padding:18px 22px}
.preview-code pre{margin:0;font-family:ui-monospace,"SF Mono",Menlo,monospace;font-size:12.5px;line-height:1.6;white-space:pre;overflow:auto}
.preview-meta{padding:24px;color:var(--muted);font-size:13px}
.preview-meta dl{display:grid;grid-template-columns:auto 1fr;gap:6px 14px;font-size:12.5px;margin:14px 0}
.preview-meta dt{color:var(--muted);font-weight:500}
.preview-meta dd{color:var(--text);font-family:ui-monospace,Menlo,monospace;word-break:break-all}
.preview-empty{display:flex;align-items:center;justify-content:center;height:100%;color:var(--muted);font-size:13px;padding:40px;text-align:center;line-height:1.7}

/* 欢迎页 */
.welcome{grid-column:2 / 3;display:flex;align-items:center;justify-content:center;background:#fff}
.welcome-card{max-width:520px;padding:48px 32px;text-align:center}
.welcome-card h2{font-size:22px;font-weight:600;letter-spacing:-.01em;margin-bottom:10px}
.welcome-card p{color:var(--muted);font-size:14px;margin-bottom:24px;line-height:1.7}
.welcome-card .wa-btn{
  display:inline-flex;align-items:center;gap:8px;padding:10px 18px;border-radius:8px;
  background:var(--primary);color:#fff;cursor:pointer;border:0;font-size:13.5px;font-weight:500;
}
.welcome-card .wa-btn:hover{background:var(--primary-hover)}

@media (max-width:700px){
  .workspace{grid-template-columns:1fr}
  .sidebar{display:none}
  .welcome{grid-column:1 / 2}
}

/* 弹窗样式 */
.modal-overlay{
  position:fixed;
  top:0;
  left:0;
  right:0;
  bottom:0;
  background:rgba(0,0,0,0.5);
  display:flex;
  align-items:center;
  justify-content:center;
  z-index:1000;
}
.modal{
  background:#fff;
  border-radius:8px;
  box-shadow:0 4px 12px rgba(0,0,0,0.15);
  width:90%;
  max-width:400px;
  overflow:hidden;
}
.modal-title{
  padding:16px 20px;
  font-size:16px;
  font-weight:600;
  border-bottom:1px solid var(--border);
}
.modal-body{
  padding:20px;
}
.modal-body label{
  display:block;
  font-size:13px;
  color:var(--muted);
  margin-bottom:8px;
}
.modal-input{
  width:100%;
  padding:8px 12px;
  border:1px solid var(--border);
  border-radius:6px;
  font-size:14px;
  outline:none;
  font-family:inherit;
}
.modal-input:focus{
  border-color:var(--accent);
}
.modal-actions{
  padding:16px 20px;
  border-top:1px solid var(--border);
  display:flex;
  gap:8px;
  justify-content:flex-end;
}