:root {
  --bg: #0e1116; --panel: #171b23; --card: #1c212c; --line: #262c3a;
  --fg: #e6e9f0; --dim: #8b93a7; --accent: #4f8cff; --ok: #34d399;
  --warn: #fbbf24; --bad: #f87171;
}
* { box-sizing: border-box; margin: 0; }
body {
  background: var(--bg); color: var(--fg);
  font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 14px;
}
.hidden { display: none !important; }

/* ---- 登录 ---- */
.login-wrap { min-height: 100vh; display: flex; align-items: center; justify-content: center; background: radial-gradient(1200px 600px at 20% -10%, #1b2333, var(--bg)); }
.login-card { width: 320px; padding: 36px 32px; background: var(--card); border: 1px solid var(--line); border-radius: 18px; text-align: center; }
.login-card .logo { font-size: 44px; }
.login-card h2 { margin: 8px 0 22px; font-weight: 600; }
.login-card input {
  width: 100%; padding: 11px 14px; border-radius: 10px; border: 1px solid var(--line);
  background: var(--panel); color: var(--fg); outline: none; font-size: 14px;
}
.login-card input:focus { border-color: var(--accent); }
.login-card button {
  width: 100%; margin-top: 14px; padding: 11px; border: none; border-radius: 10px;
  background: var(--accent); color: #fff; font-size: 15px; cursor: pointer; font-weight: 600;
}
.login-card button:hover { filter: brightness(1.1); }
.msg { min-height: 20px; margin-top: 12px; color: var(--bad); font-size: 13px; }

/* ---- 布局 ---- */
.app { display: flex; min-height: 100vh; }
.sidebar {
  width: 200px; flex-shrink: 0; background: var(--panel); border-right: 1px solid var(--line);
  display: flex; flex-direction: column; padding: 18px 12px; position: sticky; top: 0; height: 100vh;
}
.brand { font-size: 17px; font-weight: 700; padding: 4px 10px 18px; }
.sidebar nav { display: flex; flex-direction: column; gap: 4px; flex: 1; }
.sidebar nav button, .logout {
  text-align: left; padding: 11px 14px; border: none; border-radius: 10px; background: none;
  color: var(--dim); font-size: 14px; cursor: pointer;
}
.sidebar nav button:hover { background: var(--card); color: var(--fg); }
.sidebar nav button.active { background: var(--accent); color: #fff; font-weight: 600; }
.logout { border-top: 1px solid var(--line); border-radius: 0; color: var(--dim); }
.logout:hover { color: var(--bad); }

main { flex: 1; padding: 22px 26px; max-width: 1100px; }
h1 { font-size: 19px; margin-bottom: 16px; font-weight: 600; }
h2 { font-size: 15px; margin: 18px 0 10px; color: var(--dim); font-weight: 600; }

/* ---- 卡片 ---- */
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 12px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 16px; }
.card .k { color: var(--dim); font-size: 12px; margin-bottom: 6px; }
.card .v { font-size: 21px; font-weight: 700; }
.card .v small { font-size: 12px; color: var(--dim); font-weight: 400; margin-left: 4px; }
.bar { height: 8px; border-radius: 4px; background: var(--line); margin-top: 10px; overflow: hidden; }
.bar i { display: block; height: 100%; background: var(--accent); border-radius: 4px; transition: width .4s; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 10px; }
.chip {
  padding: 3px 10px; border-radius: 20px; background: var(--panel);
  border: 1px solid var(--line); font-size: 12px; color: var(--dim);
}
.chip b { color: var(--fg); font-weight: 600; }

/* ---- 表格 ---- */
table { width: 100%; border-collapse: collapse; background: var(--card); border: 1px solid var(--line); border-radius: 12px; overflow: hidden; }
th, td { text-align: left; padding: 9px 12px; font-size: 13px; border-bottom: 1px solid var(--line); }
th { color: var(--dim); font-weight: 500; background: var(--panel); }
tr:last-child td { border-bottom: none; }
td .muted { color: var(--dim); }
/* 窄屏表格横向滚动，避免挤压变形（宽屏无影响）*/
.tscroll { overflow-x: auto; -webkit-overflow-scrolling: touch; }
.tscroll table { min-width: 560px; }
/* 文件名下的次要信息（仅窄屏显示，见媒体查询）*/
.c-meta { display: none; }

.badge { padding: 2px 10px; border-radius: 20px; font-size: 12px; font-weight: 600; }
.badge.ok { background: rgba(52,211,153,.15); color: var(--ok); }
.badge.off { background: rgba(139,147,167,.15); color: var(--dim); }
.badge.bad { background: rgba(248,113,113,.15); color: var(--bad); }
.badge.warn { background: rgba(251,191,36,.15); color: var(--warn); }

button.act {
  padding: 5px 10px; border-radius: 8px; border: 1px solid var(--line); background: var(--panel);
  color: var(--fg); font-size: 12px; cursor: pointer;
}
button.act:hover { border-color: var(--accent); color: var(--accent); }
button.act.danger:hover { border-color: var(--bad); color: var(--bad); }
.danger-zone { margin-top: 20px; padding: 14px 16px; border: 1px solid var(--line); border-radius: 12px; display: flex; gap: 10px; align-items: center; background: var(--card); }
.danger-zone span { color: var(--dim); flex: 1; }

/* ---- 应用 ---- */
.apps-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 12px; }
.app-card { display: block; padding: 18px; background: var(--card); border: 1px solid var(--line); border-radius: 14px; text-decoration: none; color: var(--fg); }
.app-card:hover { border-color: var(--accent); }
.app-card .icon { font-size: 26px; }
.app-card .name { font-weight: 600; margin-top: 10px; }
.app-card .url { color: var(--dim); font-size: 12px; margin-top: 4px; word-break: break-all; }

.tree { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 14px 18px; font-family: ui-monospace, monospace; font-size: 13px; line-height: 1.7; white-space: pre-wrap; }

.offline { padding: 40px; text-align: center; color: var(--dim); }

@media (max-width: 760px) {
  .app { flex-direction: column; }
  .sidebar { width: 100%; height: auto; position: sticky; top: 0; z-index: 20; flex-direction: row; align-items: center; padding: 6px 8px; gap: 2px; overflow-x: auto; border-right: none; border-bottom: 1px solid var(--line); }
  .brand { display: none; }
  .sidebar nav { flex-direction: row; flex: 1; }
  .sidebar nav button { white-space: nowrap; padding: 8px 10px; }
  .logout { border: none; white-space: nowrap; width: auto; }
  main { padding: 14px; max-width: 100%; }

  /* 卡片/网格：窄屏两列，字与内边距收小 */
  .cards { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 10px; }
  .card { padding: 12px; border-radius: 12px; }
  .card .v { font-size: 18px; }
  .apps-grid { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); }
  .grid { grid-template-columns: repeat(auto-fill, minmax(110px, 1fr)); gap: 8px; }
  .tile img, .noimg { height: 100px; }

  /* 数据表格：字与内边距收小 + 横向滚动（进程/磁盘/服务/网络等）*/
  th, td { padding: 8px 10px; font-size: 12.5px; }
  .tscroll table { min-width: 520px; }

  /* 文件表：窄屏转卡片流（文件名+信息在上，操作按钮换行在下），完全不需横滚 */
  .ftable { overflow-x: visible; }
  .ftable table, .ftable tbody, .ftable tr, .ftable td { display: block; width: auto; }
  .ftable tr:first-child { display: none; }  /* 表头 */
  .ftable table { background: none; border: none; border-radius: 0; min-width: 0; }
  .ftable tr { background: var(--card); border: 1px solid var(--line); border-radius: 12px; margin-bottom: 10px; padding: 10px 12px; }
  .ftable td { border: none; padding: 0; }
  .ftable td.c-size, .ftable td.c-time { display: none; }
  .ftable td:first-child { font-size: 14px; }
  .ftable td.ops { margin-top: 8px; display: flex; flex-wrap: wrap; gap: 6px; }
  .ftable td.ops .act { margin: 0; }
  .c-meta { display: block; font-size: 11.5px; color: var(--dim); margin-top: 3px; font-weight: 400; white-space: nowrap; }

  /* 按钮、工具栏：触屏友好尺寸，避免误触 */
  button.act, a.act { padding: 6px 11px; font-size: 12.5px; }
  td.ops { white-space: normal; }
  td.ops .act { margin: 2px 4px 2px 0; }
  .toolbar { gap: 6px; }
  .sortbar { margin-left: 0; width: 100%; flex-wrap: wrap; }
  .sortbar .sm { padding: 4px 12px; }

  /* 表单/输入：窄屏纵向堆叠、16px 防 iOS 自动缩放（复选框行保持横排）*/
  .form label:not(.chk) { flex-direction: column; align-items: stretch; gap: 6px; }
  .form label.chk { flex-direction: row; align-items: center; }
  .form input, .form select, .login-card input { font-size: 16px; }
  .login-card { width: min(320px, 92vw); padding: 28px 22px; }

  /* 浮层与选择器 */
  .pbox { padding: 14px; max-height: 90vh; }
  button.pickbtn { max-width: 100%; }
  .vname { max-width: 45vw; }
  .vimg, .vvideo { max-width: 100%; max-height: calc(88vh - 90px); }
  .vbar { font-size: 11.5px; padding: 8px 10px; }

  /* 笔记正文 */
  .md { font-size: 15px; }
  .md h1 { font-size: 20px; }
  .md h2 { font-size: 17px; }
  .md pre, .md .math { overflow-x: auto; }
}

/* 超窄屏（小屏手机竖屏）*/
@media (max-width: 420px) {
  main { padding: 10px; }
  .cards { grid-template-columns: 1fr 1fr; }
  .grid { grid-template-columns: repeat(auto-fill, minmax(96px, 1fr)); }
  .tile img, .noimg { height: 88px; }
  .tile figcaption { font-size: 10px; padding: 5px 6px; }
  h1 { font-size: 17px; }
}

/* ---- 文件 / 备份 ---- */
.crumb { margin-bottom: 12px; font-size: 14px; }
.crumb a, .lnk { color: var(--accent); cursor: pointer; text-decoration: none; }
.crumb a:hover, .lnk:hover { text-decoration: underline; }
.toolbar { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 8px; }
.path-line { margin-bottom: 10px; font-family: ui-monospace, monospace; font-size: 12px; }
/* 文件管理列表里的图片缩略图（64px，设备端缓存复用相册那套）*/
.fthumb { width: 34px; height: 34px; object-fit: cover; border-radius: 4px; vertical-align: middle; margin-right: 8px; background: #222; }
td.ops { white-space: nowrap; }
td.ops .act { margin-right: 4px; text-decoration: none; display: inline-block; }
a.act { color: var(--fg); }
a.act:hover { border-color: var(--accent); color: var(--accent); text-decoration: none; }
.form { display: flex; flex-direction: column; gap: 10px; background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 16px; }
.form label { display: flex; align-items: center; gap: 10px; font-size: 13px; }
.form label > input[type=text], .form label > input:not([type]) { flex: 1; }
.form input:not([type=checkbox]) { padding: 8px 10px; border-radius: 8px; border: 1px solid var(--line); background: var(--panel); color: var(--fg); font-size: 13px; }
.form input:not([type=checkbox]):focus { border-color: var(--accent); outline: none; }
.form label.chk { color: var(--dim); }
.form .btns { display: flex; gap: 8px; }
.msg.bad { color: var(--bad); }
#fs-msg:not(.bad), #disk-msg:not(.bad), #bk-msg:not(.bad) { color: var(--ok); }

/* ---- 目录选择器 ---- */
.picker { position: fixed; inset: 0; background: rgba(0,0,0,.55); display: flex; align-items: center; justify-content: center; z-index: 50; padding: 16px; }
.pbox { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 18px; width: min(680px, 100%); max-height: 86vh; display: flex; flex-direction: column; gap: 10px; }
.pbox h3 { margin: 0; font-size: 15px; }
.plist { overflow: auto; flex: 1; border: 1px solid var(--line); border-radius: 10px; padding: 6px; min-height: 180px; }
.prow { padding: 7px 10px; border-radius: 8px; cursor: pointer; font-size: 13px; }
.prow:hover { background: var(--panel); color: var(--accent); }
.pbox .btns { display: flex; gap: 8px; }
button.pickbtn { max-width: 420px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; text-align: left; }

/* ---- 相册 / 影视 ---- */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 10px; margin: 12px 0; }
.tile { margin: 0; background: var(--card); border: 1px solid var(--line); border-radius: 10px; overflow: hidden; cursor: pointer; }
.tile:hover { border-color: var(--accent); }
.tile img { width: 100%; height: 130px; object-fit: cover; display: block; background: var(--panel); }
.tile figcaption { padding: 6px 8px; font-size: 11px; line-height: 1.45; word-break: break-all; }
.noimg { height: 130px; display: flex; align-items: center; justify-content: center; font-size: 30px; color: var(--dim); background: var(--panel); }
.tile.vid .noimg { font-size: 42px; }

/* ---- 大图 / 播放器浮层 ---- */
.viewer { position: fixed; inset: 0; background: rgba(0,0,0,.92); z-index: 60; display: flex; flex-direction: column; }
.vbar { display: flex; align-items: center; justify-content: space-between; gap: 10px; padding: 10px 14px; color: #fff; font-size: 12px; flex-wrap: wrap; }
.vname { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 55vw; }
.viewer .act { background: rgba(255,255,255,.12); color: #fff; border-color: transparent; }
.viewer .act:hover { background: rgba(255,255,255,.25); color: #fff; }
.vimg, .vvideo { margin: auto; max-width: 96vw; max-height: calc(92vh - 60px); display: block; }
.tile figcaption b { font-size: 12px; font-weight: 600; display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.sect { margin: 18px 0 6px; font-size: 14px; }
.toolbar.tabs { gap: 6px; padding: 0; background: none; border: none; }
.tab { padding: 5px 14px; border-radius: 20px; border: 1px solid var(--line); background: var(--card); color: var(--dim); font-size: 13px; cursor: pointer; }
.tab:hover { color: var(--fg); }
.tab.on { background: var(--accent); border-color: var(--accent); color: #fff; font-weight: 600; }
.pbar { display: block; height: 3px; background: var(--line); border-radius: 2px; margin-top: 4px; overflow: hidden; }
.pbar i { display: block; height: 100%; background: var(--accent); }
.prow { display: flex; justify-content: space-between; gap: 10px; }
.prow span:first-child { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.sortbar { display: inline-flex; gap: 2px; align-items: center; margin-left: auto; color: var(--dim); font-size: 13px; }
.sortbar .sm { padding: 2px 10px; font-size: 13px; }
.sortbar .sm.on { background: var(--accent); color: #fff; border-color: var(--accent); }
.grp { margin: 8px 0 4px; padding: 1px 0 1px 8px; border-left: 2px solid var(--accent); font-size: 13px; font-weight: 600; color: var(--dim); background: none; }

/* 课程笔记：任务卡片 */
.card .row { display: flex; align-items: center; gap: 8px; justify-content: space-between; }
.card .row b { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* 学习笔记：Markdown 渲染 */
.md { line-height: 1.75; max-width: 860px; }
.md h1 { font-size: 24px; margin: 4px 0 12px; }
.md h2 { font-size: 19px; margin: 22px 0 10px; padding-bottom: 6px; border-bottom: 1px solid var(--line, rgba(139,147,167,.25)); }
.md h3 { font-size: 16px; margin: 16px 0 8px; }
.md p { margin: 8px 0; }
.md ul { margin: 8px 0; padding-left: 22px; }
.md li { margin: 4px 0; }
.md blockquote { margin: 10px 0; padding: 8px 14px; border-left: 3px solid var(--accent); background: rgba(139,147,167,.08); border-radius: 0 6px 6px 0; }
.md blockquote p { margin: 4px 0; }
.md code { padding: 1px 5px; border-radius: 4px; background: rgba(139,147,167,.15); font-size: 13px; }
.md pre { margin: 10px 0; padding: 12px; overflow-x: auto; background: rgba(139,147,167,.1); border-radius: 8px; }
.md pre code { padding: 0; background: none; }

/* 学习笔记：表格、公式、任务清单 */
.md table { width: 100%; margin: 12px 0; border-collapse: collapse; font-size: 14px; display: block; overflow-x: auto; }
.md th, .md td { padding: 7px 10px; border: 1px solid rgba(139,147,167,.25); text-align: left; vertical-align: top; }
.md th { background: rgba(139,147,167,.12); font-weight: 600; white-space: nowrap; }
.md tr:nth-child(even) td { background: rgba(139,147,167,.04); }
.md .math { margin: 12px 0; overflow-x: auto; text-align: center; }
.md ol { margin: 8px 0; padding-left: 24px; }
.md li.task { list-style: none; margin-left: -18px; }
.md li.task input { margin-right: 6px; }
.md hr { margin: 18px 0; border: 0; border-top: 1px solid rgba(139,147,167,.25); }
.md a { color: var(--accent); }