:root {
  --bg: #f4f1ea;
  --paper: #fffdf8;
  --ink: #1c1a17;
  --muted: #6b6358;
  --line: #e3ddd0;
  --accent: #b4451f;
  --accent-soft: #f3e7df;
  --serif: "Iowan Old Style", "Apple Garamond", "Palatino Linotype", "Noto Serif KR", Georgia, serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans KR", sans-serif;
}

/* 다크모드 (툴바 토글 시 data-theme 적용) */
[data-theme="dark"] {
  --bg: #1a1815;
  --paper: #232019;
  --ink: #ece7dd;
  --muted: #9a9082;
  --line: #3a352c;
  --accent: #e8754a;
  --accent-soft: #3a2a20;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  line-height: 1.6;
}

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

.wrap {
  max-width: 760px;
  margin: 0 auto;
  padding: 40px 22px 80px;
}

/* masthead */
.masthead {
  border-bottom: 3px double var(--line);
  padding-bottom: 22px;
  margin-bottom: 36px;
}
.brand {
  font-family: var(--serif);
  font-size: 40px;
  font-weight: 700;
  letter-spacing: -0.5px;
}
.issue-date {
  font-family: var(--serif);
  font-style: italic;
  color: var(--muted);
  margin-top: 4px;
}
.tagline {
  font-family: var(--serif);
  font-size: 17px;
  color: var(--muted);
  margin: 10px 0 0;
}
.topics {
  font-size: 13px;
  color: var(--accent);
  margin: 12px 0 0;
  letter-spacing: 0.3px;
}

/* section blocks */
.block { margin-bottom: 44px; }
.block-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
  padding-bottom: 8px;
  margin-bottom: 18px;
}
.block-head h2 {
  font-family: var(--serif);
  font-size: 24px;
  margin: 0;
}
.block-sub {
  font-size: 12px;
  color: var(--muted);
  letter-spacing: 0.5px;
  text-transform: uppercase;
}
.more { font-size: 13px; color: var(--accent); }

/* trending / tools grid */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 14px;
}
.card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 16px 18px;
  transition: border-color 0.15s, transform 0.15s;
}
.card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}
.card-title {
  display: block;
  font-family: var(--serif);
  font-size: 17px;
  font-weight: 600;
  line-height: 1.35;
  margin-bottom: 6px;
}
.item-desc {
  font-size: 14px;
  color: var(--muted);
  margin: 0 0 10px;
}
.card-foot {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  color: var(--muted);
}
.card-foot .src {
  margin-left: auto;
  background: var(--accent-soft);
  color: var(--accent);
  padding: 1px 8px;
  border-radius: 20px;
  font-weight: 600;
  letter-spacing: 0.3px;
}
.meta-line { color: var(--muted); }

/* papers rows */
.rows { display: flex; flex-direction: column; gap: 0; }
.row {
  border-bottom: 1px solid var(--line);
  padding: 14px 0;
}
.row-title {
  font-family: var(--serif);
  font-size: 16px;
  font-weight: 600;
  display: block;
  margin-bottom: 4px;
}
.byline { color: var(--muted); font-size: 12px; }
.date { color: var(--muted); font-size: 12px; margin-left: 8px; }

/* issue list (index recent / archive) */
.issue-list, .archive-list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.issue-list li, .archive-list li {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 11px 0;
  border-bottom: 1px solid var(--line);
}
.issue-list li a, .archive-list li a.a-date {
  font-family: var(--serif);
  font-size: 16px;
  font-weight: 600;
  min-width: 130px;
}
.r-title, .a-count { color: var(--muted); font-size: 13px; }
.r-count { margin-left: auto; font-size: 12px; color: var(--muted); }

.empty { color: var(--muted); font-style: italic; }

/* footer */
.site-foot {
  border-top: 1px solid var(--line);
  margin-top: 40px;
  padding-top: 20px;
  font-size: 13px;
  color: var(--muted);
}
.site-foot a { color: var(--accent); }

@media (max-width: 600px) {
  .brand { font-size: 32px; }
  .grid { grid-template-columns: 1fr; }
  .issue-list li, .archive-list li { flex-wrap: wrap; gap: 4px; }
}

/* TL;DR (한눈에 요약) */
.tldr { background: var(--accent-soft); border: 1px solid var(--line); border-radius: 6px; padding: 6px 18px; }
.tldr .block-head { border-bottom: 1px solid var(--line); }
.tldr-count { font-size: 15px; margin: 4px 0 6px; }
.tldr-count b { color: var(--accent); font-size: 17px; }
.tldr-topics { font-size: 13px; color: var(--muted); margin: 0 0 8px; }
.tldr-picks { list-style: none; margin: 0 0 8px; padding: 0; }
.tldr-picks li { font-size: 14px; padding: 4px 0; border-bottom: 1px dashed var(--line); }
.tldr-picks li:last-child { border-bottom: none; }
.tldr-tag { display: inline-block; background: var(--accent); color: #fff; font-size: 11px;
  padding: 1px 7px; border-radius: 10px; margin-right: 8px; letter-spacing: 0.3px; }