/* ---------------------------------------------------------
   山间笔记 · 样式表
   手写 CSS，无框架。暖纸色 + 墨色 + 陶土色点缀。
   --------------------------------------------------------- */

:root {
  --paper: #fbf8f2;
  --paper-2: #ffffff;
  --ink: #26221c;
  --ink-2: #514a40;
  --muted: #8b8175;
  --line: #e6dfd2;
  --accent: #b4552d;
  --accent-soft: #f2e5dc;
  --radius: 10px;
  --serif: "Songti SC", "Noto Serif CJK SC", "Source Han Serif SC", Georgia, "Times New Roman", serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--ink); text-decoration: none; border-bottom: 1px solid transparent; transition: color .15s, border-color .15s; }
a:hover { color: var(--accent); }
img { max-width: 100%; }

.wrap { width: min(760px, 100% - 44px); margin: 0 auto; }
.muted { color: var(--muted); }
.small { font-size: 13px; }
.right { text-align: right; }
.dot { color: var(--line); margin: 0 6px; }

/* ---------- 页头 ---------- */
.site-header {
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, #fffdf8, var(--paper));
  position: sticky; top: 0; z-index: 20;
  backdrop-filter: saturate(1.2) blur(6px);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 16px 0 14px; }
.brand { display: flex; align-items: center; gap: 12px; border: 0; }
.brand-mark {
  width: 38px; height: 38px; flex: none; display: grid; place-items: center;
  background: var(--ink); color: var(--paper); border-radius: 9px;
  font-family: var(--serif); font-size: 20px; letter-spacing: 1px;
}
.brand-text { display: flex; flex-direction: column; line-height: 1.3; }
.brand-text strong { font-family: var(--serif); font-size: 19px; letter-spacing: .5px; }
.brand-text small { color: var(--muted); font-size: 12px; }
.nav { display: flex; align-items: center; gap: 18px; font-size: 14.5px; }
.nav a { color: var(--ink-2); }
.nav a:hover { color: var(--accent); }
.nav-cta { border: 1px solid var(--line); border-radius: 999px; padding: 4px 14px; font-size: 13.5px; background: var(--paper-2); }
.nav-cta:hover { border-color: var(--accent); color: var(--accent); }

/* ---------- 首页 hero ---------- */
.hero { padding: 54px 0 30px; border-bottom: 1px dashed var(--line); margin-bottom: 28px; }
.hero h1 { font-family: var(--serif); font-size: clamp(34px, 6vw, 46px); letter-spacing: 2px; margin: 0 0 12px; font-weight: 600; }
.hero-sub { color: var(--ink-2); margin: 0; font-family: var(--serif); font-size: 17px; letter-spacing: .5px; }

/* ---------- 工具条 ---------- */
.toolbar { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; justify-content: space-between; margin: 6px 0 26px; }
.search { display: flex; gap: 8px; flex: 1 1 260px; max-width: 340px; }
.search input {
  width: 100%; padding: 9px 13px; border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--paper-2); font: inherit; font-size: 14px; color: var(--ink);
}
.search input:focus { outline: 2px solid var(--accent-soft); border-color: var(--accent); }
.search button, .btn {
  padding: 9px 18px; border: 1px solid var(--ink); background: var(--ink); color: #fff;
  border-radius: var(--radius); font: inherit; font-size: 14px; cursor: pointer; white-space: nowrap;
  transition: background .15s, transform .05s;
}
.btn:hover, .search button:hover { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn:active { transform: translateY(1px); }
.btn-block { width: 100%; }
.btn-ghost { background: transparent; color: var(--ink-2); border-color: var(--line); }
.btn-ghost:hover { background: var(--paper-2); color: var(--accent); border-color: var(--accent); }
.btn-link { font-size: 14px; color: var(--muted); border-bottom: 1px dotted var(--line); }
.tags { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 4px 12px; border: 1px solid var(--line); border-radius: 999px;
  background: var(--paper-2); color: var(--ink-2); font-size: 13px;
}
.chip:hover { border-color: var(--accent); color: var(--accent); }
.chip.is-active { background: var(--ink); border-color: var(--ink); color: var(--paper); }
.chip-num { font-size: 11px; color: var(--muted); }
.chip.is-active .chip-num { color: #cfc6b8; }
.result-note { color: var(--ink-2); font-size: 14px; margin: -8px 0 22px; }

/* ---------- 文章列表 ---------- */
.post-list { display: flex; flex-direction: column; gap: 6px; }
.post-card { padding: 26px 0; border-bottom: 1px solid var(--line); }
.post-card:first-child { padding-top: 6px; }
.post-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 4px; font-size: 13px; color: var(--muted); }
.post-meta time { font-variant-numeric: tabular-nums; }
.tag {
  display: inline-block; padding: 1px 9px; border-radius: 999px; border: 0;
  background: var(--accent-soft); color: var(--accent) !important; font-size: 12.5px;
}
.tag-plain { background: #f2efe8; color: var(--ink-2) !important; }
.post-title { font-family: var(--serif); font-size: 24px; line-height: 1.45; margin: 10px 0 8px; font-weight: 600; letter-spacing: .3px; }
.post-title a { border: 0; }
.post-title a:hover { color: var(--accent); }
.post-excerpt { color: var(--ink-2); margin: 0 0 10px; font-size: 15.5px; }
.read-more { font-size: 14px; color: var(--accent); border-bottom: 1px solid transparent; }
.read-more:hover { border-bottom-color: var(--accent); }

.empty { padding: 60px 0; text-align: center; color: var(--muted); }
.empty a { color: var(--accent); border-bottom: 1px solid var(--accent-soft); }

.pagination { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 30px 0 50px; font-size: 14px; }
.page-btn { padding: 7px 16px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--paper-2); }
.page-btn.is-disabled { color: #c3bbae; background: transparent; }
.page-info { color: var(--muted); font-variant-numeric: tabular-nums; }

/* ---------- 文章页 ---------- */
.article { padding: 44px 0 10px; }
.article-head h1 { font-family: var(--serif); font-size: clamp(28px, 5vw, 36px); line-height: 1.42; margin: 14px 0 0; font-weight: 600; letter-spacing: .5px; }
.article-body { font-family: var(--serif); font-size: 17.5px; line-height: 2.0; color: #2b2620; margin-top: 26px; }
.article-body p { margin: 0 0 1.35em; }
.article-body p:first-child::first-letter { font-size: 1.05em; }
.article-foot { border-top: 1px solid var(--line); margin-top: 34px; padding-top: 14px; font-size: 13px; }
.edit-link { color: var(--accent); border-bottom: 1px dotted var(--accent); }

.post-nav { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin: 26px 0 10px; }
.post-nav-item {
  display: flex; flex-direction: column; gap: 4px; padding: 16px 18px;
  border: 1px solid var(--line); border-radius: var(--radius); background: var(--paper-2);
}
.post-nav-item span { font-size: 12.5px; color: var(--muted); }
.post-nav-item strong { font-family: var(--serif); font-weight: 600; font-size: 15.5px; line-height: 1.5; }
.post-nav-item:hover { border-color: var(--accent); }
.post-nav-item.is-next { text-align: right; }

/* ---------- 评论 ---------- */
.comments { margin: 42px 0 70px; border-top: 1px solid var(--line); padding-top: 28px; }
.section-title { font-family: var(--serif); font-size: 20px; font-weight: 600; margin: 0 0 18px; }
.count { font-size: 12.5px; color: var(--muted); font-family: var(--sans); font-weight: 400; margin-left: 4px; }
.comment-list { list-style: none; padding: 0; margin: 0 0 26px; display: flex; flex-direction: column; gap: 16px; }
.comment { padding: 14px 16px; background: var(--paper-2); border: 1px solid var(--line); border-radius: var(--radius); }
.comment-head { display: flex; flex-wrap: wrap; align-items: baseline; gap: 10px; font-size: 13px; color: var(--muted); margin-bottom: 6px; }
.comment-head strong { color: var(--ink); font-size: 14px; }
.comment-body { font-size: 15px; color: var(--ink-2); }

.comment-form { background: var(--paper-2); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; }
.field { margin-bottom: 14px; }
.field label { display: block; font-size: 13px; color: var(--ink-2); margin-bottom: 6px; }
.field input, .field textarea, .editor input, .editor textarea {
  width: 100%; padding: 10px 12px; border: 1px solid var(--line); border-radius: 8px;
  background: #fff; font: inherit; font-size: 15px; color: var(--ink); resize: vertical;
}
.field input:focus, .field textarea:focus, .editor input:focus, .editor textarea:focus {
  outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft);
}
.hp-field { position: absolute; left: -9999px; }
.form-error { background: #fdeceb; border: 1px solid #f3c7c3; color: #a3342a; padding: 10px 14px; border-radius: 8px; font-size: 14px; }
.flash { background: #eef5ea; border: 1px solid #cfe3c6; color: #3f6b32; padding: 10px 14px; border-radius: 8px; font-size: 14px; margin-bottom: 18px; }

/* ---------- 归档 / 关于 ---------- */
.page-head { padding: 46px 0 26px; border-bottom: 1px dashed var(--line); margin-bottom: 26px; }
.page-head h1 { font-family: var(--serif); font-size: 34px; margin: 0 0 8px; font-weight: 600; letter-spacing: 1px; }
.archive-year { margin-bottom: 30px; }
.year-title { font-family: var(--serif); font-size: 19px; margin: 0 0 12px; padding-bottom: 8px; border-bottom: 1px solid var(--line); }
.archive-list { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 10px; }
.archive-list li { display: flex; align-items: baseline; gap: 12px; font-size: 15px; }
.archive-list time { color: var(--muted); font-size: 13px; font-variant-numeric: tabular-nums; flex: none; width: 46px; }
.archive-list a { flex: 1; }
.about-stats { display: flex; gap: 30px; margin: 32px 0; padding: 20px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.about-stats dt { font-size: 12.5px; color: var(--muted); margin-bottom: 2px; }
.about-stats dd { margin: 0; font-family: var(--serif); font-size: 22px; }

/* ---------- 页脚 ---------- */
.site-footer { border-top: 1px solid var(--line); background: #f6f2ea; margin-top: 40px; }
.footer-inner { padding: 28px 0; display: flex; flex-wrap: wrap; gap: 6px 20px; justify-content: space-between; font-size: 13px; color: var(--ink-2); }
.footer-inner p { margin: 0; }

/* ---------- 后台 ---------- */
.admin-body { background: #f7f5f0; }
.admin-header { background: var(--ink); color: var(--paper); }
.admin-header-inner { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 12px 0; }
.brand-sm { color: var(--paper); font-family: var(--serif); font-size: 17px; display: flex; align-items: baseline; gap: 8px; }
.brand-sm small { color: #a29a8d; font-size: 12px; }
.admin-nav { display: flex; flex-wrap: wrap; gap: 16px; font-size: 14px; }
.admin-nav a { color: #d9d2c6; }
.admin-nav a:hover { color: #fff; }
.admin-main { padding: 30px 0 60px; }
.admin-title-row { display: flex; align-items: center; justify-content: space-between; gap: 14px; margin-bottom: 22px; }
.admin-title-row h1 { font-family: var(--serif); font-size: 26px; margin: 0; font-weight: 600; }
.stat-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(110px, 1fr)); gap: 12px; margin-bottom: 26px; }
.stat { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 16px; }
.stat span { display: block; font-size: 12.5px; color: var(--muted); }
.stat strong { font-family: var(--serif); font-size: 22px; font-weight: 600; }
.admin-table { width: 100%; border-collapse: collapse; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; font-size: 14.5px; }
.admin-table th, .admin-table td { padding: 12px 14px; text-align: left; border-bottom: 1px solid var(--line); vertical-align: middle; }
.admin-table th { background: #faf7f1; font-size: 12.5px; color: var(--muted); font-weight: 500; letter-spacing: .5px; }
.admin-table tr:last-child td { border-bottom: 0; }
.cell-title { font-family: var(--serif); font-size: 15.5px; }
.badge { display: inline-block; font-size: 12px; padding: 1px 8px; border-radius: 999px; background: #f0ece4; color: var(--muted); }
.badge-on { background: #e7f1e3; color: #4a7a3a; }
.actions { display: flex; gap: 12px; justify-content: flex-end; align-items: center; }
.actions form { margin: 0; }
.link-danger { background: none; border: 0; padding: 0; color: #a3342a; font: inherit; font-size: 14px; cursor: pointer; }
.link-danger:hover { text-decoration: underline; }

.editor { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; }
.editor .input-title { font-family: var(--serif); font-size: 20px; }
.editor textarea { font-family: var(--serif); font-size: 16px; line-height: 1.9; }
.field-inline { display: flex; flex-wrap: wrap; align-items: flex-end; gap: 20px; }
.field-inline > div { flex: 1 1 220px; }
.checkbox { display: inline-flex; align-items: center; gap: 8px; font-size: 14px; color: var(--ink-2); padding-bottom: 10px; }
.checkbox input { width: auto; }
.hint { margin: 6px 0 0; }
.editor-actions { display: flex; align-items: center; gap: 12px; padding-top: 6px; }

.admin-comments { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 14px; }
.admin-comment { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 16px 18px; }
.admin-comment form { margin-top: 8px; }

/* ---------- 登录 ---------- */
.login-wrap { min-height: 100vh; display: grid; place-items: center; padding: 24px; }
.login-card { width: min(380px, 100%); background: #fff; border: 1px solid var(--line); border-radius: 14px; padding: 32px 28px; box-shadow: 0 18px 40px -30px rgba(38, 34, 28, .5); }
.login-card h1 { font-family: var(--serif); font-size: 24px; margin: 0 0 6px; font-weight: 600; letter-spacing: 1px; }
.login-card p { margin: 0 0 18px; font-size: 13.5px; }
.login-hint { margin-top: 18px; line-height: 1.7; }

/* ---------- 响应式 ---------- */
@media (max-width: 620px) {
  .wrap { width: min(760px, 100% - 32px); }
  .brand-text small { display: none; }
  .nav { gap: 12px; font-size: 14px; }
  .hero { padding: 34px 0 22px; }
  .post-title { font-size: 21px; }
  .article-body { font-size: 16.5px; line-height: 1.95; }
  .post-nav { grid-template-columns: 1fr; }
  .post-nav-item.is-next { text-align: left; }
  .admin-table { display: block; overflow-x: auto; }
  .about-stats { gap: 20px; }
}