/* 面试助手：PC 侧栏 + 手机抽屉 */
:root {
  --bg: #f4f5f6;
  --side: #4f5c5f;
  --side-2: #3d484b;
  --accent: #8b4a45;
  --text: #222;
  --muted: #666;
  --card: #fff;
  --line: #e3e6e7;
  --warn: #8b4a45;
  --ok: #2d6a4f;
  --radius: 10px;
  --side-w: 260px;
}

* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  font-family: "Microsoft YaHei", "PingFang SC", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
}

.app { display: flex; min-height: 100%; }
.sidebar {
  width: var(--side-w);
  background: var(--side);
  color: #fff;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow: auto;
}
.brand { padding: 18px 16px 12px; }
.brand h1 { font-size: 16px; margin: 0 0 4px; }
.brand p { margin: 0; font-size: 12px; opacity: 0.8; }
.nav { padding: 8px 0 24px; }
.nav a {
  display: block;
  color: #fff;
  text-decoration: none;
  padding: 9px 18px;
  font-size: 14px;
}
.nav a:hover, .nav a.active { background: var(--side-2); }
.nav .group-title {
  padding: 10px 18px 4px;
  font-size: 12px;
  letter-spacing: 0.04em;
  opacity: 0.7;
  cursor: pointer;
  user-select: none;
}
.nav .sub { padding-left: 12px; display: none; }
.nav .sub.open { display: block; }
.nav .sub a { font-size: 13px; padding: 7px 18px 7px 22px; opacity: 0.95; }

.topbar {
  display: none;
  position: sticky;
  top: 0;
  z-index: 20;
  background: var(--side);
  color: #fff;
  padding: 10px 12px;
  align-items: center;
  gap: 10px;
}
.topbar button {
  background: transparent;
  color: #fff;
  border: 1px solid rgba(255,255,255,0.35);
  border-radius: 6px;
  padding: 4px 10px;
}
.mask {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.35);
  z-index: 25;
}

.main { flex: 1; min-width: 0; padding: 20px 22px 48px; }
.crumb { color: var(--muted); font-size: 13px; margin-bottom: 8px; }
h2.page-title { margin: 0 0 12px; font-size: 22px; color: var(--side); }
.lead { color: var(--muted); margin: 0 0 16px; }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px 16px;
  margin-bottom: 12px;
}
.card h3 { margin: 0 0 8px; font-size: 16px; }
.script { white-space: pre-wrap; background: #f7f8f8; border-left: 3px solid var(--side); padding: 10px 12px; border-radius: 0 8px 8px 0; }
.explain { white-space: pre-wrap; }
.card pre {
  background: #1f2a2c;
  color: #e8e8e8;
  padding: 10px;
  border-radius: 8px;
  overflow: auto;
  font-size: 12px;
  line-height: 1.45;
  white-space: pre-wrap;
}
.diff {
  padding: 8px 0;
  border-top: 1px dashed var(--line);
}
.diff:first-child { border-top: 0; padding-top: 0; }
.tag {
  display: inline-block;
  font-size: 12px;
  padding: 2px 8px;
  border-radius: 99px;
  background: #e8eeef;
  color: var(--side);
  margin-right: 6px;
}
.warn {
  background: #f8eceb;
  color: var(--warn);
  border: 1px solid #e8cfcb;
  padding: 10px 12px;
  border-radius: 8px;
  margin-bottom: 12px;
}
.ok { color: var(--ok); }
.no { color: var(--warn); }
ul.clean { margin: 6px 0; padding-left: 18px; }
details.q {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 8px 12px;
  margin-bottom: 8px;
}
details.q summary { cursor: pointer; font-weight: 600; }
details.q .block { margin-top: 8px; }
details.q pre {
  background: #1f2a2c;
  color: #e8e8e8;
  padding: 10px;
  border-radius: 8px;
  overflow: auto;
  font-size: 12px;
  line-height: 1.45;
}
label.field { display: block; font-size: 13px; margin: 8px 0 4px; color: var(--muted); }
input, textarea, select {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  font: inherit;
}
textarea { min-height: 72px; }
.row-btns { display: flex; flex-wrap: wrap; gap: 8px; margin: 12px 0; }
button.btn, .btn {
  background: var(--side);
  color: #fff;
  border: 0;
  border-radius: 8px;
  padding: 8px 12px;
  cursor: pointer;
  font: inherit;
}
button.btn.ghost {
  background: #fff;
  color: var(--side);
  border: 1px solid var(--side);
}
button.btn.danger { background: var(--accent); }
.table-card { font-size: 14px; }
.table-card + .table-card { border-top: 1px dashed var(--line); padding-top: 10px; }

@media (max-width: 860px) {
  .sidebar {
    position: fixed;
    z-index: 30;
    transform: translateX(-100%);
    transition: transform 0.2s;
  }
  .sidebar.open { transform: none; }
  .topbar { display: flex; }
  .main { padding: 14px 12px 40px; }
  .mask.open { display: block; }
}