:root {
  --bg: #ffffff;
  --bg-soft: #f7f7f8;
  --border: #e5e5e7;
  --text: #111113;
  --text-2: #6b6b70;
  --accent: #2563eb;
  --accent-soft: #eff4ff;
  --danger: #dc2626;
  --radius: 8px;
  --mono: ui-monospace, "SF Mono", "Cascadia Code", Consolas, monospace;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg); color: var(--text);
  font-size: 14px; line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
button {
  font: inherit; cursor: pointer; border: 1px solid var(--border);
  background: var(--bg); color: var(--text);
  padding: 6px 14px; border-radius: var(--radius); transition: .15s;
}
button:hover { border-color: #c9c9cd; background: var(--bg-soft); }
button.primary { background: var(--text); color: #fff; border-color: var(--text); }
button.primary:hover { background: #2b2b30; }
button.danger { color: var(--danger); border-color: #f3c7c7; }
button.danger:hover { background: #fdf2f2; }
input, textarea, select {
  font: inherit; color: inherit; width: 100%;
  border: 1px solid var(--border); border-radius: var(--radius);
  padding: 8px 12px; outline: none; background: var(--bg);
}
input:focus, textarea:focus { border-color: var(--text); }

/* ---- 布局 ---- */
.app { display: flex; flex-direction: column; height: 100vh; }
.topbar {
  display: flex; align-items: center; gap: 12px;
  padding: 0 20px; height: 52px; flex-shrink: 0;
  border-bottom: 1px solid var(--border); background: var(--bg);
}
.topbar .logo { font-weight: 700; letter-spacing: -.02em; font-size: 15px; }
.topbar .logo .dot { color: var(--accent); }
.topbar .group-badge {
  margin-left: auto; display: flex; align-items: center; gap: 8px;
  color: var(--text-2); font-size: 13px;
}
.topbar .group-badge b { color: var(--text); font-weight: 600; }
.main { display: flex; flex: 1; min-height: 0; }

/* ---- 左侧目录 ---- */
.sidebar {
  width: 240px; flex-shrink: 0; border-right: 1px solid var(--border);
  display: flex; flex-direction: column; background: var(--bg-soft);
}
.sidebar-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 14px 8px; color: var(--text-2); font-size: 12px;
  text-transform: uppercase; letter-spacing: .06em;
}
.sidebar-head button { padding: 2px 8px; font-size: 12px; }
.dir-list { flex: 1; overflow-y: auto; padding: 4px 8px 16px; }
.dir-item {
  display: flex; align-items: center; gap: 8px;
  padding: 7px 10px; border-radius: 6px; cursor: pointer;
  color: var(--text); user-select: none; position: relative;
}
.dir-item:hover { background: #ececee; }
.dir-item.active { background: var(--text); color: #fff; }
.dir-item .cnt { margin-left: auto; font-size: 12px; color: var(--text-2); }
.dir-item.active .cnt { color: #bbb; }
.dir-item svg { flex-shrink: 0; opacity: .8; }

/* ---- 工作区 ---- */
.workspace { flex: 1; min-width: 0; display: flex; flex-direction: column; }
.ws-toolbar {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 20px; border-bottom: 1px solid var(--border);
}
.ws-toolbar .title { font-weight: 600; }
.ws-toolbar .spacer { flex: 1; }
.file-list { flex: 1; overflow-y: auto; padding: 20px; }
.file-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 10px;
}
.file-card {
  border: 1px solid var(--border); border-radius: var(--radius);
  padding: 12px 14px; cursor: pointer; background: var(--bg);
  transition: .12s; position: relative;
}
.file-card:hover { border-color: #b9b9bf; box-shadow: 0 1px 4px rgba(0,0,0,.05); }
.file-card .fname { font-weight: 500; word-break: break-all; font-size: 13.5px; }
.file-card .fmeta { color: var(--text-2); font-size: 12px; margin-top: 4px; }
.dropzone-hint {
  border: 1.5px dashed var(--border); border-radius: var(--radius);
  padding: 40px; text-align: center; color: var(--text-2); margin-bottom: 16px;
}
.workspace.dragover .dropzone-hint, .dropzone-hint.dragover {
  border-color: var(--accent); background: var(--accent-soft); color: var(--accent);
}
.empty { color: var(--text-2); text-align: center; padding: 60px 20px; }

/* ---- 编辑器 ---- */
.editor-wrap { flex: 1; display: flex; flex-direction: column; min-height: 0; }
.editor-tabs { display: flex; gap: 4px; padding: 8px 20px 0; border-bottom: 1px solid var(--border); }
.editor-tabs button { border: none; border-radius: 6px 6px 0 0; background: none; padding: 8px 16px; color: var(--text-2); }
.editor-tabs button.active { background: var(--bg); color: var(--text); font-weight: 600; box-shadow: inset 0 -2px 0 var(--accent); }
.editor-body { flex: 1; min-height: 0; display: flex; }
.editor-body textarea {
  flex: 1; border: none; border-radius: 0; resize: none;
  padding: 20px; font-family: var(--mono); font-size: 13px; line-height: 1.7;
}
.preview { flex: 1; overflow-y: auto; padding: 24px 32px; }

/* ---- markdown 预览 ---- */
.preview h1, .preview h2, .preview h3 { margin: 1em 0 .4em; letter-spacing: -.01em; }
.preview h1 { font-size: 24px; border-bottom: 1px solid var(--border); padding-bottom: .3em; }
.preview h2 { font-size: 19px; }
.preview p, .preview ul, .preview ol { margin: .5em 0; }
.preview code { font-family: var(--mono); font-size: 12.5px; background: var(--bg-soft); padding: 2px 5px; border-radius: 4px; }
.preview pre { background: #17171a; color: #e6e6ea; padding: 14px; border-radius: var(--radius); overflow-x: auto; margin: .6em 0; }
.preview pre code { background: none; color: inherit; padding: 0; }
.preview table { border-collapse: collapse; margin: .6em 0; display: block; overflow-x: auto; }
.preview th, .preview td { border: 1px solid var(--border); padding: 6px 12px; font-size: 13px; }
.preview th { background: var(--bg-soft); }
.preview blockquote { border-left: 3px solid var(--border); padding-left: 14px; color: var(--text-2); margin: .6em 0; }
.preview a { color: var(--accent); }

/* ---- 密钥页 ---- */
.gate { display: flex; align-items: center; justify-content: center; height: 100vh; background: var(--bg-soft); }
.gate-card {
  width: 380px; background: var(--bg); border: 1px solid var(--border);
  border-radius: 12px; padding: 36px; box-shadow: 0 4px 24px rgba(0,0,0,.06);
}
.gate-card .logo { font-size: 17px; font-weight: 700; margin-bottom: 4px; }
.gate-card p { color: var(--text-2); font-size: 13px; margin-bottom: 20px; }
.gate-card .err { color: var(--danger); font-size: 13px; margin-top: 10px; min-height: 18px; }
.gate-card button { width: 100%; margin-top: 14px; padding: 9px; }

/* ---- 右键菜单 ---- */
.ctxmenu {
  position: fixed; z-index: 100; min-width: 140px;
  background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius);
  box-shadow: 0 6px 24px rgba(0,0,0,.1); padding: 4px; display: none;
}
.ctxmenu .mi { padding: 7px 12px; border-radius: 5px; cursor: pointer; font-size: 13px; }
.ctxmenu .mi:hover { background: var(--bg-soft); }
.ctxmenu .mi.danger { color: var(--danger); }

/* ---- 弹窗 / toast ---- */
.modal-mask {
  position: fixed; inset: 0; background: rgba(0,0,0,.35); z-index: 90;
  display: none; align-items: center; justify-content: center;
}
.modal {
  width: 400px; background: var(--bg); border-radius: 12px; padding: 24px;
  box-shadow: 0 12px 40px rgba(0,0,0,.15);
}
.modal h3 { font-size: 15px; margin-bottom: 14px; }
.modal .modal-body { margin-bottom: 18px; color: var(--text-2); font-size: 13.5px; }
.modal .modal-actions { display: flex; justify-content: flex-end; gap: 8px; }
#toast {
  position: fixed; bottom: 28px; left: 50%; transform: translateX(-50%) translateY(80px);
  background: var(--text); color: #fff; padding: 9px 20px; border-radius: 8px;
  font-size: 13px; z-index: 200; opacity: 0; transition: .25s; pointer-events: none;
}
#toast.show { transform: translateX(-50%) translateY(0); opacity: 1; }

/* ---- 管理端 ---- */
.admin-container { max-width: 960px; margin: 0 auto; padding: 32px 24px 60px; }
.admin-container h2 { font-size: 17px; margin: 28px 0 12px; }
.stat-cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 12px; }
.stat-card { border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; }
.stat-card b { display: block; font-size: 15px; }
.stat-card .meta { color: var(--text-2); font-size: 12.5px; margin: 6px 0 12px; }
.stat-card .ops { display: flex; gap: 6px; flex-wrap: wrap; }
.stat-card .ops button { padding: 4px 10px; font-size: 12.5px; }
.admin-file-list { border: 1px solid var(--border); border-radius: var(--radius); }
.admin-dir { border-bottom: 1px solid var(--border); }
.admin-dir:last-child { border-bottom: none; }
.admin-dir-head { padding: 10px 14px; font-weight: 600; background: var(--bg-soft); display: flex; }
.admin-dir-head button { margin-left: auto; padding: 2px 8px; font-size: 12px; }
.admin-file-row { display: flex; align-items: center; padding: 7px 14px 7px 28px; border-top: 1px solid var(--border); font-size: 13px; }
.admin-file-row .ops { margin-left: auto; display: flex; gap: 6px; }
.admin-file-row .ops button { padding: 2px 8px; font-size: 12px; }
.back-link { color: var(--text-2); text-decoration: none; font-size: 13px; }
.back-link:hover { color: var(--text); }
/* 顶栏「下载整个工作区」文字链接：带下载图标，与组名稍拉开距离 */
.ws-dl-link { display: inline-flex; align-items: center; gap: 4px; margin-left: 10px; }
.ws-dl-link svg { opacity: .8; }
.skill-btn {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--accent); color: #fff !important; text-decoration: none;
  font-size: 12.5px; font-weight: 500;
  padding: 6px 12px; border-radius: 7px; transition: .15s;
}
.skill-btn:hover { background: #1d4fd8; color: #fff; }
.skill-btn svg { margin-bottom: 1px; }