:root {
  --bg: #fdfdfc;
  --fg: #1f2328;
  --muted: #6b7280;
  --line: #e5e7eb;
  --accent: #2563eb;
  --card: #ffffff;
  --code-bg: #f4f4f5;
  --danger: #b42318;
  --ok: #067647;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16181d;
    --fg: #e6e6e6;
    --muted: #9aa0a6;
    --line: #2c3038;
    --accent: #7aa2f7;
    --card: #1c1f26;
    --code-bg: #23262d;
    --danger: #f97066;
    --ok: #75e0a7;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.75 -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", "PingFang SC", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
}

.wrap { max-width: 46rem; margin: 0 auto; padding: 2rem 1.25rem 4rem; }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.site-nav {
  display: flex; flex-wrap: wrap; align-items: baseline; gap: 1rem;
  padding-bottom: 1.25rem; margin-bottom: 2rem; border-bottom: 1px solid var(--line);
}
.site-nav .brand { font-weight: 600; font-size: 1.05rem; color: var(--fg); }
.site-nav .nav-links { display: flex; gap: 1rem; margin-left: auto; font-size: .9rem; }
.site-nav .nav-links a { color: var(--muted); }

h1, h2, h3 { line-height: 1.35; margin: 2rem 0 .75rem; }
h1 { font-size: 1.7rem; margin-top: 0; }
h2 { font-size: 1.3rem; }
h3 { font-size: 1.1rem; }

p { margin: .9rem 0; }

.site-foot {
  margin-top: 3.5rem; padding-top: 1.25rem; border-top: 1px solid var(--line);
  color: var(--muted); font-size: .85rem;
}

/* —— 列表 —— */
.page-head { margin-bottom: 1.5rem; }
.page-head h1 { margin-bottom: .25rem; }
.page-head p { color: var(--muted); margin: 0; font-size: .95rem; }

.card-list { list-style: none; margin: 0; padding: 0; }
.card-list li { padding: 1.1rem 0; border-bottom: 1px solid var(--line); }
.card-list li:last-child { border-bottom: 0; }
.card-list h2 { margin: 0 0 .3rem; font-size: 1.15rem; }
.card-list h2 a { color: var(--fg); }
.card-list .meta { color: var(--muted); font-size: .82rem; display: flex; gap: .75rem; align-items: center; }
.card-list .excerpt { color: var(--muted); font-size: .92rem; margin: .35rem 0 0; }

.tag {
  display: inline-block; padding: .05rem .45rem; border: 1px solid var(--line);
  border-radius: 999px; font-size: .75rem; color: var(--muted);
}

.empty { color: var(--muted); padding: 2rem 0; }

/* —— 正文 —— */
.article-head { padding-bottom: 1.25rem; margin-bottom: 1.5rem; border-bottom: 1px solid var(--line); }
.article-head h1 { margin-bottom: .4rem; }
.article-body { overflow-wrap: break-word; }
.article-body pre {
  background: var(--code-bg); padding: 1rem; border-radius: 8px; overflow-x: auto;
  font-size: .88rem; line-height: 1.6;
}
.article-body code {
  background: var(--code-bg); padding: .12rem .35rem; border-radius: 4px;
  font: .88em/1.5 ui-monospace, SFMono-Regular, Consolas, "Courier New", monospace;
}
.article-body pre code { background: none; padding: 0; }
.article-body blockquote {
  margin: 1.2rem 0; padding: .2rem 1rem; border-left: 3px solid var(--line); color: var(--muted);
}
.article-body img { max-width: 100%; height: auto; border-radius: 8px; }
.article-body hr { border: 0; border-top: 1px solid var(--line); margin: 2rem 0; }
.table-wrap { overflow-x: auto; margin: 1.25rem 0; }
.article-body table { border-collapse: collapse; width: 100%; font-size: .92rem; }
.article-body th, .article-body td { border: 1px solid var(--line); padding: .5rem .7rem; text-align: left; }
.article-body th { background: var(--code-bg); }

/* —— 表单 —— */
form.stack { display: block; }
label { display: block; margin: 1.1rem 0 .35rem; font-size: .9rem; font-weight: 600; }
.hint { font-weight: 400; color: var(--muted); font-size: .82rem; margin-left: .4rem; }

input[type="text"], input[type="password"], input[type="url"], textarea, select {
  width: 100%; padding: .6rem .7rem; border: 1px solid var(--line); border-radius: 8px;
  background: var(--card); color: var(--fg); font: inherit; font-size: .95rem;
}
textarea { min-height: 22rem; resize: vertical; font-family: ui-monospace, SFMono-Regular, Consolas, monospace; font-size: .9rem; line-height: 1.7; }
input:focus, textarea:focus, select:focus { outline: 2px solid var(--accent); outline-offset: 1px; border-color: var(--accent); }

.row { display: flex; flex-wrap: wrap; gap: 1rem; }
.row > div { flex: 1 1 12rem; }

button, .btn {
  display: inline-block; padding: .55rem 1rem; border-radius: 8px; border: 1px solid var(--line);
  background: var(--card); color: var(--fg); font: inherit; font-size: .92rem; cursor: pointer;
}
button.primary { background: var(--accent); border-color: var(--accent); color: #fff; font-weight: 600; }
button.danger { color: var(--danger); border-color: var(--danger); background: transparent; }
button:hover, .btn:hover { opacity: .9; text-decoration: none; }
.actions { display: flex; flex-wrap: wrap; gap: .6rem; align-items: center; margin-top: 1.75rem; }
.actions .spacer { flex: 1; }

.notice { padding: .7rem .9rem; border-radius: 8px; font-size: .9rem; margin-bottom: 1.25rem; border: 1px solid var(--line); background: var(--card); }
.notice.error { color: var(--danger); border-color: var(--danger); }
.notice.ok { color: var(--ok); border-color: var(--ok); }

/* —— 登录 —— */
.login-box { max-width: 22rem; margin: 4rem auto; }

/* —— 后台 —— */
.admin-bar {
  display: flex; align-items: center; gap: 1rem; padding: .5rem 1.25rem;
  background: var(--fg); color: var(--bg); font-size: .85rem;
}
.admin-bar a { color: var(--bg); text-decoration: underline; }
.admin-bar .who { opacity: .75; }
.admin-bar .spacer { flex: 1; }
.admin-bar form { margin: 0; }
.admin-bar button {
  padding: .2rem .6rem; font-size: .8rem; background: transparent;
  border-color: currentColor; color: inherit;
}

.admin-table { width: 100%; border-collapse: collapse; font-size: .9rem; }
.admin-table th, .admin-table td { border-bottom: 1px solid var(--line); padding: .6rem .4rem; text-align: left; vertical-align: top; }
.admin-table th { color: var(--muted); font-weight: 600; font-size: .82rem; }
.admin-table td.actions-cell { white-space: nowrap; }
.status { font-size: .78rem; }
.status.published { color: var(--ok); }
.status.draft { color: var(--muted); }

/* —— 分页 —— */
.pager {
  display: flex; align-items: center; gap: .75rem; margin-top: 2rem;
  padding-top: 1.25rem; border-top: 1px solid var(--line); font-size: .9rem;
}
.pager .spacer { flex: 1; }
.pager .page-now { color: var(--muted); font-size: .85rem; }
.pager .page-link.disabled { color: var(--muted); opacity: .45; }