/* ============================================================
   4chan 没品笑话存档 — 简洁白色博客风
   off-white 底 + 白色卡片 + 4px 圆角 + 单一强调色
   ============================================================ */
:root {
  --bg: #f7f6f3;
  --panel: #ffffff;
  --panel-soft: #faf9f6;
  --border: #e4e2dc;
  --border-soft: #eeece7;
  --fg: #2b2a26;
  --fg-dim: #6b6860;
  --fg-faint: #a3a099;
  --accent: #4a7c59;
  --accent-hover: #3d6849;
  --accent-wash: rgba(74, 124, 89, 0.08);
  --radius: 4px;
  --mono: "Cascadia Mono", "JetBrains Mono", "SF Mono", Menlo, Consolas, "Courier New", monospace;
  --sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei",
          "Noto Sans CJK SC", "Source Han Sans SC", "Segoe UI", sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { color-scheme: light; }

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
}

::selection { background: var(--accent-wash); color: var(--fg); }

/* ---------- 顶部导航 ---------- */
header {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 0 32px;
  height: 64px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}

header .logo {
  color: var(--fg);
  font-weight: 700;
  text-decoration: none;
  font-size: 1.05rem;
  letter-spacing: -0.02em;
  white-space: nowrap;
}

header .logo em {
  font-style: normal;
  color: var(--accent);
}

header .search {
  display: flex;
  gap: 0;
  flex: 1;
  max-width: 400px;
  margin-left: auto;
}

header .search input {
  flex: 1;
  padding: 9px 14px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius) 0 0 var(--radius);
  color: var(--fg);
  font-size: 0.92rem;
  transition: border-color 0.15s, background 0.15s;
}

header .search input:focus {
  outline: none;
  border-color: var(--accent);
  background: var(--panel);
}

header .search input::placeholder { color: var(--fg-faint); }

header .search button {
  padding: 9px 18px;
  background: var(--accent);
  border: 1px solid var(--accent);
  border-radius: 0 var(--radius) var(--radius) 0;
  color: #fff;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.9rem;
  transition: background 0.15s;
}

header .search button:hover { background: var(--accent-hover); }

main {
  padding: 40px 32px 80px;
  max-width: 1200px;
  margin: 0 auto;
}

/* ---------- 年份标题 ---------- */
.year {
  color: var(--fg);
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 48px 0 20px;
  display: flex;
  align-items: center;
  gap: 16px;
}

.year:first-child { margin-top: 0; }

.year::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--border);
}

/* ---------- 帖子卡片网格 ---------- */
.thread-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 20px;
  margin-bottom: 40px;
}

.thread-card {
  display: flex;
  flex-direction: column;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  text-decoration: none;
  color: var(--fg);
  transition: border-color 0.15s, box-shadow 0.15s;
}

.thread-card:hover {
  border-color: var(--accent);
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
}

.thread-card .cover {
  aspect-ratio: 16 / 9;
  background: var(--panel-soft);
  overflow: hidden;
  border-bottom: 1px solid var(--border-soft);
}

.thread-card .cover img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

.thread-card .card-body {
  padding: 18px 20px 14px;
  flex: 1;
}

.thread-card h3 {
  font-size: 0.98rem;
  font-weight: 600;
  line-height: 1.5;
  letter-spacing: -0.01em;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  min-height: 2.9em;
}

.thread-card .count {
  display: inline-block;
  margin-top: 10px;
  font-size: 0.78rem;
  color: var(--accent);
  background: var(--accent-wash);
  padding: 3px 10px;
  border-radius: var(--radius);
  font-weight: 600;
}

.thread-card .excerpt {
  color: var(--fg-dim);
  font-size: 0.85rem;
  padding: 10px 20px 18px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  line-height: 1.65;
}

/* ---------- 帖子页：纵向单列图片流 ---------- */
.thread-head {
  margin-bottom: 32px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
}

.thread-head h1 {
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.5;
}

.thread-head .count-line {
  color: var(--fg-dim);
  font-size: 0.88rem;
  margin-top: 8px;
}

.body {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 32px;
  overflow: hidden;
}

.body summary {
  padding: 14px 20px;
  cursor: pointer;
  color: var(--accent);
  font-weight: 600;
  font-size: 0.92rem;
  user-select: none;
  transition: background 0.15s;
}

.body summary:hover { background: var(--panel-soft); }

.body pre {
  padding: 0 20px 20px;
  white-space: pre-wrap;
  font-family: var(--sans);
  font-size: 0.92rem;
  color: var(--fg);
  line-height: 1.8;
}

/* 纵向图片流：每张图全宽居中，滚动看 */
.image-flow {
  display: flex;
  flex-direction: column;
  gap: 24px;
  margin-bottom: 40px;
}

.image-flow figure {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.image-flow figure a { display: block; }

.image-flow img {
  width: 100%;
  height: auto;
  display: block;
}

.image-flow figcaption {
  padding: 12px 20px;
  font-size: 0.85rem;
  color: var(--fg-dim);
  border-top: 1px solid var(--border-soft);
  background: var(--panel-soft);
}

.image-flow .badge {
  position: absolute;
  top: 12px;
  right: 12px;
  background: var(--fg);
  color: #fff;
  font-size: 0.7rem;
  font-weight: 600;
  padding: 3px 9px;
  border-radius: var(--radius);
}

.image-flow .badge.bad { background: #c0392b; }

.image-flow figure { position: relative; }

/* ---------- 详情页 ---------- */
.detail { max-width: 760px; margin: 0 auto; }

.detail img {
  max-width: 100%;
  display: block;
  margin: 0 auto 28px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.ocr {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 28px;
  overflow: hidden;
}

.ocr summary {
  padding: 14px 20px;
  cursor: pointer;
  color: var(--accent);
  font-weight: 600;
  font-size: 0.92rem;
  user-select: none;
  transition: background 0.15s;
}

.ocr summary:hover { background: var(--panel-soft); }

.ocr .desc {
  padding: 0 20px 12px;
  color: var(--fg-dim);
  font-size: 0.9rem;
  line-height: 1.7;
}

.ocr .text {
  padding: 0 20px 20px;
  white-space: pre-wrap;
  font-family: var(--mono);
  font-size: 0.86rem;
  color: var(--fg);
  line-height: 1.7;
  background: var(--panel-soft);
  border-top: 1px solid var(--border-soft);
  padding-top: 16px;
}

/* ---------- 搜索 ---------- */
mark {
  background: rgba(74, 124, 89, 0.22);
  color: var(--fg);
  padding: 0 2px;
  border-radius: 2px;
}

.search-head { margin-bottom: 28px; }

.search-head h2 {
  font-size: 1.15rem;
  font-weight: 700;
  margin: 24px 0 16px;
  color: var(--fg);
}

.search-head h2:first-child { margin-top: 0; }

/* ---------- 分页 ---------- */
.pager {
  display: flex;
  gap: 8px;
  justify-content: center;
  padding: 40px 0 20px;
  flex-wrap: wrap;
  align-items: center;
}

.pager a, .pager .cur, .pager .disabled {
  padding: 8px 14px;
  text-decoration: none;
  color: var(--fg);
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.88rem;
  transition: border-color 0.15s, background 0.15s, color 0.15s;
}

.pager a:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.pager .cur {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
  font-weight: 600;
}

.pager .disabled {
  color: var(--fg-faint);
  background: transparent;
  border-color: transparent;
  cursor: default;
}

.pager .pager-info {
  color: var(--fg-dim);
  font-size: 0.85rem;
  margin-right: 12px;
}

/* ---------- 通用 ---------- */
.back {
  color: var(--accent);
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 600;
  transition: color 0.15s;
  display: inline-block;
  margin-bottom: 24px;
}

.back:hover { color: var(--accent-hover); }

.empty {
  color: var(--fg-faint);
  text-align: center;
  padding: 80px 0;
  font-size: 0.98rem;
}

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

@media (max-width: 768px) {
  header { flex-wrap: wrap; height: auto; padding: 12px 20px; gap: 12px; }
  header .search { max-width: none; order: 3; flex-basis: 100%; }
  main { padding: 24px 20px 60px; }
  .thread-list { grid-template-columns: 1fr; }
  .year { font-size: 1.2rem; }
  .thread-head h1 { font-size: 1.2rem; }
}