/* Readmere — reading, thinking, keeping. */
/* 全部使用系统自带字体，不加载任何外部字体文件——
   避免跨境请求拖慢首屏渲染，尤其是国内网络访问 Google 字体经常缓慢或超时。 */

:root {
  --font-serif: "Songti SC", "STSong", "SimSun", serif;
  --font-mono: ui-monospace, "SF Mono", Menlo, Consolas, "Courier New", monospace;
  --paper: #efeee7;
  --paper-raised: #f6f5f0;
  --ink: #262420;
  --ink-soft: #6b6860;
  --ink-faint: #9c988d;
  --accent: #4f6c58;
  --accent-soft: #dfe4da;
  --hairline: #d9d6cb;
  --max-w: 640px;
}

:root[data-theme="dark"] {
  --paper: #1c1b18;
  --paper-raised: #242320;
  --ink: #e8e4da;
  --ink-soft: #b0aca0;
  --ink-faint: #7a766c;
  --accent: #86ab8f;
  --accent-soft: #33413a;
  --hairline: #3a3833;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", sans-serif;
  font-size: 17px;
  line-height: 1.9;
  -webkit-font-smoothing: antialiased;
  transition: background-color 0.15s ease, color 0.15s ease;
}

/* --- Font size control: applies to reading text only, not headings --- */
html.font-sm .essay p,
html.font-sm .essay blockquote,
html.font-sm .takeaway p { font-size: 15px; }

html.font-lg .essay p,
html.font-lg .essay blockquote,
html.font-lg .takeaway p { font-size: 19px; }

/* --- Prefs bar (dark mode + font size) --- */
.prefs-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}
.prefs-bar button {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-faint);
  background: transparent;
  border: 1px solid var(--hairline);
  border-radius: 30px;
  padding: 3px 11px;
  cursor: pointer;
  transition: color 0.15s ease, border-color 0.15s ease;
}
.prefs-bar button:hover { color: var(--ink); border-color: var(--ink-faint); }
.prefs-bar button.active { color: var(--accent); border-color: var(--accent-soft); }
.prefs-bar .prefs-divider { color: var(--hairline); font-size: 12px; }

/* --- Search box --- */
.search-box { margin: 8px 0 40px; }
.search-box input {
  width: 100%;
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--hairline);
  font-family: -apple-system, "PingFang SC", sans-serif;
  font-size: 15px;
  color: var(--ink);
  padding: 8px 2px;
  outline: none;
  transition: border-color 0.15s ease;
}
.search-box input::placeholder { color: var(--ink-faint); }
.search-box input:focus { border-color: var(--accent); }

.entry.is-hidden { display: none; }
.section.is-hidden { display: none; }

.no-results {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--ink-faint);
  padding: 24px 0;
  display: none;
}
.no-results.is-visible { display: block; }

::selection { background: var(--accent-soft); }

a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid var(--accent-soft);
  transition: border-color 0.15s ease;
}
a:hover { border-color: var(--accent); }
a:focus-visible, button:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

.wrap {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 72px 24px 96px;
}

/* --- Wordmark / header --- */

.mark {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 15px;
  letter-spacing: 0.02em;
  color: var(--ink);
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  border: none;
}
.mark:hover { border: none; }
.mark::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  transform: translateY(-2px);
}

.hero { margin-bottom: 56px; }
.hero h1 {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 40px;
  letter-spacing: 0.01em;
  margin: 28px 0 4px;
}
.hero p {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--ink-faint);
  margin: 0;
}

/* --- Category sections on home --- */

.section { margin-bottom: 48px; }

.section-label {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-faint);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 18px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--hairline);
  display: flex;
  justify-content: space-between;
}
.section-label .count { color: var(--ink-faint); font-weight: 400; }

.entry {
  display: block;
  padding: 24px 0;
  border-bottom: 1px solid var(--hairline);
  border: none;
}
.entry:hover { border-bottom: 1px solid var(--hairline); }
.section .entry:last-child { border-bottom: none; }

.entry-title {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 20px;
  color: var(--ink);
  margin: 0 0 8px;
}
.entry:hover .entry-title { color: var(--accent); }

.entry-meta {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-faint);
  margin-bottom: 10px;
}

.entry-hook {
  font-size: 15px;
  color: var(--ink-soft);
  line-height: 1.7;
  margin: 0;
}

.foot {
  margin-top: 64px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-faint);
}

/* --- Article page --- */

.back {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--ink-faint);
  border: none;
}
.back:hover { color: var(--accent); border: none; }

.meta-block {
  margin: 32px 0 8px;
  padding-left: 16px;
  border-left: 2px solid var(--accent-soft);
}
.meta-row {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--ink-faint);
  letter-spacing: 0.02em;
  margin: 3px 0;
}
.meta-row b { color: var(--ink-soft); font-weight: 500; }

.article-title {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 30px;
  line-height: 1.4;
  margin: 18px 0 32px;
}

.essay p { margin: 0 0 22px; }
.essay p.lede { font-size: 18px; color: var(--ink); }

.essay blockquote {
  margin: 36px 0;
  padding: 4px 0 4px 20px;
  border-left: 3px solid var(--accent);
  font-family: var(--font-serif);
  font-size: 19px;
  font-weight: 600;
  line-height: 1.7;
  color: var(--ink);
}
.essay blockquote p { margin: 0; }

.takeaway {
  margin-top: 40px;
  padding: 20px 22px;
  background: var(--paper-raised);
  border-radius: 2px;
}
.takeaway .label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 8px;
  display: block;
}
.takeaway p { margin: 0; font-size: 15.5px; color: var(--ink); }

.origin {
  margin-top: 44px;
  padding-top: 20px;
  border-top: 1px solid var(--hairline);
  font-size: 14px;
  color: var(--ink-faint);
  line-height: 1.7;
}
.origin a { font-weight: 500; }

@media (max-width: 480px) {
  .wrap { padding: 48px 20px 72px; }
  .hero h1 { font-size: 32px; }
  .article-title { font-size: 25px; }
  body { font-size: 16px; }
}