:root {
  --bg: #fdfdfc; --fg: #1a1a18; --muted: #6b6b66; --line: #e4e4e0;
  --accent: #a3491f; --code-bg: #f4f4f1; --danger: #b3261e;
  --max: 44rem;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16161a; --fg: #e6e6e3; --muted: #9a9a94; --line: #2c2c32;
    --accent: #e08b5e; --code-bg: #202027; --danger: #f2836b;
  }
}

* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--fg);
  font: 16px/1.7 -apple-system, BlinkMacSystemFont, "Segoe UI",
        "PingFang TC", "Noto Sans CJK TC", "Microsoft JhengHei", sans-serif;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.site-header, .site-footer, main {
  max-width: var(--max); margin: 0 auto; padding: 0 1.25rem;
}
.site-header {
  display: flex; align-items: baseline; justify-content: space-between;
  padding-top: 2.5rem; padding-bottom: 1.5rem;
}
.site-name { font-size: 1.1rem; font-weight: 600; color: var(--fg); }
.site-footer {
  margin-top: 5rem; padding-top: 1.5rem; padding-bottom: 3rem;
  border-top: 1px solid var(--line); color: var(--muted); font-size: .85rem;
}
.lede { color: var(--muted); margin-top: 0; }
.empty { color: var(--muted); }

/* ---------- 文章列表 ---------- */
.post-list { list-style: none; padding: 0; margin: 2rem 0 0; }
.post-list li { padding-bottom: 2rem; margin-bottom: 2rem; border-bottom: 1px solid var(--line); }
.post-list li:last-child { border-bottom: none; }
.post-link { font-size: 1.3rem; font-weight: 600; color: var(--fg); }
.post-link:hover { color: var(--accent); text-decoration: none; }
.post-meta { margin-top: .4rem; color: var(--muted); font-size: .85rem; }
.post-summary { margin: .6rem 0 0; color: var(--muted); }
.tag {
  display: inline-block; margin-left: .5rem; padding: .05rem .5rem;
  background: var(--code-bg); border-radius: 999px; font-size: .78rem;
}
.filter { color: var(--muted); font-size: .9rem; }
.pagination {
  display: flex; justify-content: space-between; align-items: center;
  margin-top: 3rem; font-size: .9rem;
}
.page-indicator { color: var(--muted); }

/* ---------- 單篇文章 ---------- */
.post h1 { font-size: 2rem; line-height: 1.3; margin-bottom: .3rem; }
.post-body { margin-top: 2.5rem; }
.post-body h2 { margin-top: 2.5rem; font-size: 1.4rem; }
.post-body h3 { margin-top: 2rem; font-size: 1.15rem; }
.post-body img { max-width: 100%; height: auto; border-radius: 4px; }
.post-body blockquote {
  margin: 1.5rem 0; padding: .2rem 0 .2rem 1.2rem;
  border-left: 3px solid var(--line); color: var(--muted);
}
.post-body code {
  background: var(--code-bg); padding: .12em .35em;
  border-radius: 3px; font-size: .88em;
}
.post-body pre {
  background: var(--code-bg); padding: 1rem; border-radius: 6px;
  overflow-x: auto; line-height: 1.5;
}
.post-body pre code { background: none; padding: 0; }
.post-body table { border-collapse: collapse; width: 100%; font-size: .92rem; }
.post-body th, .post-body td { border: 1px solid var(--line); padding: .5rem .7rem; text-align: left; }
.back { margin-top: 4rem; font-size: .9rem; }
.error-page { text-align: center; padding: 4rem 0; }
.error-page h1 { font-size: 4rem; margin: 0; color: var(--muted); }

/* ---------- 表單 / 後台 ---------- */
.btn, .link-btn {
  font: inherit; font-size: .88rem; cursor: pointer;
  border-radius: 6px; border: 1px solid var(--line);
  background: transparent; color: var(--fg); padding: .4rem .9rem;
}
.btn:hover { border-color: var(--accent); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.link-btn { border: none; padding: 0; color: var(--accent); }
.link-btn.danger { color: var(--danger); }
.form-error { color: var(--danger); font-size: .88rem; }

.login-form {
  max-width: 20rem; margin: 4rem auto; display: flex;
  flex-direction: column; gap: 1rem;
}
.login-form h1 { font-size: 1.3rem; margin: 0; }
.login-form label { display: flex; flex-direction: column; gap: .3rem; font-size: .85rem; color: var(--muted); }
input, textarea {
  font: inherit; color: var(--fg); background: var(--bg);
  border: 1px solid var(--line); border-radius: 6px; padding: .5rem .65rem;
}
input:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: -1px; }

.admin-bar {
  display: flex; align-items: center; justify-content: space-between;
  gap: 1rem; margin-bottom: 1.5rem;
}
.admin-bar h1 { font-size: 1.3rem; margin: 0; }
.count { color: var(--muted); font-size: .85rem; font-weight: 400; margin-left: .6rem; }
.editor-actions { display: flex; align-items: center; gap: .6rem; }
.save-state { color: var(--muted); font-size: .82rem; }

.admin-table { width: 100%; border-collapse: collapse; font-size: .92rem; }
.admin-table th {
  text-align: left; color: var(--muted); font-weight: 500;
  font-size: .8rem; padding-bottom: .5rem;
}
.admin-table td { border-top: 1px solid var(--line); padding: .7rem 0; }
.admin-table td:first-child { width: 55%; }
.row-actions { text-align: right; }
.row-actions > * { margin-left: .9rem; }
.badge { font-size: .78rem; padding: .1rem .5rem; border-radius: 999px; background: var(--code-bg); }
.badge.published { color: #2d7a44; }
.badge.draft { color: var(--muted); }

/* ---------- 編輯器 ---------- */
.editor { display: flex; flex-direction: column; gap: 1rem; }
.title-input { font-size: 1.5rem; font-weight: 600; border: none; padding: .3rem 0; border-radius: 0; }
.title-input:focus { outline: none; border-bottom: 2px solid var(--accent); }
.meta-row { display: flex; gap: 1rem; }
.meta-row label { flex: 1; display: flex; flex-direction: column; gap: .3rem; font-size: .8rem; color: var(--muted); }
.summary-input { resize: vertical; }
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; min-height: 60vh; }
.body-input {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: .88rem; line-height: 1.65; resize: none;
}
.preview {
  border: 1px solid var(--line); border-radius: 6px;
  padding: 1rem; overflow-y: auto; max-height: 75vh;
}
.preview pre { background: var(--code-bg); padding: 1rem; border-radius: 6px; overflow-x: auto; }
.preview code { background: var(--code-bg); padding: .12em .35em; border-radius: 3px; font-size: .88em; }
.preview pre code { background: none; padding: 0; }
.preview img { max-width: 100%; height: auto; }

/* 編輯器在窄螢幕上疊起來，並讓內容用滿寬度 */
body:has(.editor) main, body:has(.admin-table) main { max-width: 68rem; }
@media (max-width: 700px) {
  .split { grid-template-columns: 1fr; }
  .preview { max-height: 40vh; }
  .meta-row { flex-direction: column; }
}