/* 面试复习站 · 骨架样式（无人值守会话不要改本文件） */
:root {
  --bg: #faf8f4; --panel: #ffffff; --ink: #1d1b18; --muted: #6b665e; --line: #e4dfd6;
  --accent: #b4461f; --hint-bg: #fff3c4; --hint-ink: #5a4300; --one-bg: #e7f3ec; --one-ink: #124a2c;
  --say-bg: #eaf0fb; --say-ink: #1b3566; --ok: #2e7d4f; --again: #b4461f; --code-bg: #f1ede6;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #15140f; --panel: #1f1d18; --ink: #ece8df; --muted: #a39d91; --line: #35322b;
    --accent: #f08a5d; --hint-bg: #3f3508; --hint-ink: #ffe28a; --one-bg: #12301f; --one-ink: #a9e5c1;
    --say-bg: #16243f; --say-ink: #b9cdf5; --ok: #6fcf97; --again: #f08a5d; --code-bg: #2a2721;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font: 17px/1.75 -apple-system, "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
}
.wrap { max-width: 760px; margin: 0 auto; padding: 0 20px 96px; }
a { color: var(--accent); }
h1 { font-size: 28px; line-height: 1.3; margin: 28px 0 8px; }
h2 { font-size: 20px; margin: 0; line-height: 1.4; }
h3 { font-size: 16px; margin: 20px 0 6px; color: var(--muted); letter-spacing: .04em; }
code { background: var(--code-bg); padding: 1px 6px; border-radius: 4px; font: 14px/1.5 ui-monospace, Menlo, monospace; }
pre { background: var(--code-bg); padding: 12px 14px; border-radius: 8px; overflow-x: auto; }
pre code { padding: 0; background: none; }

/* 顶栏：进度条 + 模式开关，始终可见 */
.bar {
  position: sticky; top: 0; z-index: 5; background: var(--bg); border-bottom: 1px solid var(--line);
  display: flex; gap: 10px; align-items: center; flex-wrap: wrap; padding: 10px 20px;
}
.bar .home { font-weight: 600; text-decoration: none; }
.bar .meter { flex: 1 1 120px; height: 8px; background: var(--line); border-radius: 4px; overflow: hidden; }
.bar .meter i { display: block; height: 100%; width: 0; background: var(--ok); transition: width .2s; }
.bar .count { font-size: 14px; color: var(--muted); font-variant-numeric: tabular-nums; }
button {
  font: inherit; font-size: 14px; padding: 6px 14px; border-radius: 999px; cursor: pointer;
  border: 1px solid var(--line); background: var(--panel); color: var(--ink);
}
button[aria-pressed="true"] { background: var(--ink); color: var(--bg); border-color: var(--ink); }
button:focus-visible, summary:focus-visible, a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* 章首「本章 3 句话」与章尾自测 */
.tldr, .selftest { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 14px 18px; margin: 16px 0 28px; }
.tldr ol, .selftest ol { margin: 6px 0 0; padding-left: 22px; }

/* 卡片 */
.card { background: var(--panel); border: 1px solid var(--line); border-radius: 14px; padding: 20px; margin: 0 0 22px; scroll-margin-top: 64px; }
.card.known { opacity: .55; }
.card header { display: flex; gap: 10px; align-items: baseline; margin-bottom: 12px; }
.lv { flex: none; font-size: 12px; font-weight: 700; padding: 2px 8px; border-radius: 6px; border: 1px solid var(--line); color: var(--muted); }
.hint, .one, .say { border-radius: 10px; padding: 10px 14px; margin: 10px 0; }
.hint { background: var(--hint-bg); color: var(--hint-ink); font-weight: 700; font-size: 18px; }
.one { background: var(--one-bg); color: var(--one-ink); font-weight: 600; }
.say { background: var(--say-bg); color: var(--say-ink); }
.hint::before, .one::before, .say::before { display: block; font-size: 12px; font-weight: 600; opacity: .75; letter-spacing: .06em; }
.hint::before { content: "口诀"; }
.one::before { content: "一句话"; }
.say::before { content: "30 秒口述（直接念）"; }
.src { font-size: 13px; color: var(--muted); }
details { border-top: 1px dashed var(--line); margin-top: 12px; padding-top: 8px; }
summary { cursor: pointer; font-weight: 600; padding: 4px 0; }
.chase dt { font-weight: 600; margin-top: 10px; }
.chase dd { margin: 2px 0 0; color: var(--muted); }
.tablebox { overflow-x: auto; margin: 10px 0; }
table { border-collapse: collapse; width: 100%; font-size: 15px; }
th, td { border: 1px solid var(--line); padding: 6px 10px; text-align: left; vertical-align: top; }
th { background: var(--code-bg); }
.marks { display: flex; gap: 8px; margin-top: 14px; }
.marks .ok[aria-pressed="true"] { background: var(--ok); border-color: var(--ok); color: #fff; }
.marks .again[aria-pressed="true"] { background: var(--again); border-color: var(--again); color: #fff; }

/* 速背模式：只留问题，点卡片才露答案 */
body.drill .card:not(.open) > :not(header):not(.peek) { display: none; }
.peek { display: none; }
body.drill .card:not(.open) .peek { display: inline-block; }

/* 首页章节列表 */
.chapters { list-style: none; padding: 0; margin: 12px 0; }
.chapters li { display: flex; gap: 12px; align-items: baseline; padding: 10px 0; border-bottom: 1px solid var(--line); }
.chapters .no { flex: none; width: 28px; color: var(--muted); font-variant-numeric: tabular-nums; }
.chapters .todo { color: var(--muted); }
.chapters .stat { margin-left: auto; font-size: 13px; color: var(--muted); white-space: nowrap; }
.group { margin-top: 28px; }
.big { display: inline-block; margin: 8px 0 4px; padding: 12px 22px; border-radius: 12px; background: var(--accent); color: #fff; text-decoration: none; font-weight: 600; }
@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }