/* reading.css — 书斋 · 暗色极简版 */

:root {
  --bg: #000;
  --bg-card: #0a0a0a;
  --text: #f5f5f7;
  --text-secondary: #86868b;
  --text-dim: #424245;
  --text-thin: #2d2d2f;
  --border: #1d1d1f;
  --accent: #2997ff;
  --max-w: 720px;
}

body {
  font-family: -apple-system, "SF Pro Display", "Helvetica Neue", "PingFang SC", sans-serif;
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  line-height: 1.8;
  margin: 0;
  padding: 0;
}

/* Nav - 沿用首页极简风格 */
nav {
  position: fixed; top: 0; left: 0; width: 100%; z-index: 100;
  height: 44px;
  display: flex; align-items: center; justify-content: center;
  mix-blend-mode: difference;
}
nav .nav-inner {
  max-width: var(--max-w); width: 100%;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 24px;
}
nav .logo-link {
  font-size: 11px; font-weight: 500; color: #fff;
  letter-spacing: .08em; text-decoration: none; text-transform: uppercase;
  opacity: .5; transition: opacity .3s;
}
nav .logo-link:hover { opacity: 1; }
nav .nav-links { display: flex; gap: 24px; }
nav .nav-links a {
  font-size: 10px; font-weight: 400; color: #fff;
  text-decoration: none; opacity: .4; letter-spacing: .04em;
  text-transform: uppercase; transition: opacity .3s;
}
nav .nav-links a:hover { opacity: .7; }

/* Page */
.reading-page {
  max-width: var(--max-w); margin: 0 auto;
  padding: 100px 24px 60px;
}

.reading-page h1 {
  font-size: 28px; font-weight: 700;
  letter-spacing: -.02em; margin-bottom: 8px;
}
.page-desc {
  font-size: 13px; color: var(--text-dim);
  margin-bottom: 40px;
}

/* Books Grid */
.books-grid {
  display: flex; flex-direction: column; gap: 1px;
  background: var(--border); border-radius: 12px; overflow: hidden;
}
.book-card {
  display: block; text-decoration: none;
  background: var(--bg); padding: 24px 28px;
  transition: background .2s;
}
.book-card:hover { background: var(--bg-card); }
.book-card-title {
  font-size: 17px; font-weight: 600; color: var(--text);
  margin-bottom: 3px; letter-spacing: -.01em;
}
.book-card-author {
  font-size: 12px; color: var(--text-secondary); margin-bottom: 4px;
}
.book-card-meta {
  font-size: 11px; color: var(--text-dim);
}

/* Book Detail Page */
.book-header {
  padding: 40px 0 32px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 32px;
}
.book-header h1 {
  font-size: 28px; font-weight: 700; letter-spacing: -.02em;
  margin-bottom: 12px;
}
.book-header .meta {
  font-size: 13px; color: var(--text-secondary); line-height: 1.8;
}
.book-header .back {
  display: inline-block;
  font-size: 12px; color: var(--accent); text-decoration: none;
  margin-bottom: 16px;
}
.book-header .back:hover { opacity: .7; }
.book-tags { margin-top: 12px; }
.tag {
  display: inline-block;
  font-size: 10px; color: var(--text-dim);
  border: 1px solid var(--border); border-radius: 999px;
  padding: 4px 12px; margin: 2px 4px 2px 0;
  text-decoration: none; letter-spacing: .02em;
}

/* Excerpts */
.excerpt {
  padding: 28px 0;
  border-bottom: 1px solid var(--border);
}
.excerpt:last-of-type { border-bottom: none; }
.excerpt-text {
  font-size: 16px; color: var(--text);
  line-height: 1.9; margin-bottom: 12px;
}
.excerpt-text .hl {
  color: var(--accent);
}
.excerpt-meta {
  font-size: 11px; color: var(--text-dim);
}
.excerpt-source {
  font-size: 11px; color: var(--text-secondary);
  margin-top: 8px;
}

/* Article / About pages */
article {
  max-width: 640px; margin: 0 auto;
  padding: 100px 24px 80px;
}
article h1 {
  font-size: 28px; font-weight: 700;
  letter-spacing: -.02em; margin-bottom: 32px;
}
article h2 {
  font-size: 20px; font-weight: 600; margin: 40px 0 12px;
}
article h3 {
  font-size: 16px; font-weight: 600; margin: 24px 0 8px;
}
article p {
  font-size: 15px; color: var(--text-secondary);
  line-height: 1.9; margin-bottom: 16px;
}
article blockquote {
  border-left: 2px solid var(--text-dim);
  padding: 12px 20px; margin: 20px 0;
  font-size: 14px; font-style: italic; color: var(--text);
  line-height: 1.8;
}
article .meta {
  font-size: 12px; color: var(--text-dim); margin-bottom: 20px;
}
article .back {
  font-size: 12px; color: var(--accent); text-decoration: none;
}

/* Footer - Apple style */
footer {
  border-top: 1px solid var(--border);
  padding: 20px 0; text-align: center;
}
footer span {
  font-size: 10px; color: var(--text-thin);
}

/* Mobile */
@media (max-width: 640px) {
  .reading-page { padding: 80px 16px 40px; }
  .reading-page h1 { font-size: 22px; }
  .book-card { padding: 20px; }
  .book-header h1 { font-size: 22px; }
  article { padding: 80px 16px 40px; }
  nav .nav-inner { padding: 0 12px; gap: 8px; }
  nav .nav-links {
    display: flex;
    gap: 12px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    max-width: 70vw;
  }
  nav .nav-links::-webkit-scrollbar { display: none; }
  nav .nav-links a { font-size: 12px; white-space: nowrap; }
}