/* Aligned to randomstorms.net design tokens — white bg, black ink, #ff3300 hover,
   Space Mono throughout, 960px content width, 0 border-radius. */

:root {
  --bg: #ffffff;
  --paper: #ffffff;
  --ink: #000000;
  --ink-soft: #333333;
  --muted: #666666;
  --line: #000000;
  --line-soft: #e0e0e0;
  --accent: #ff3300;

  --mono: "Space Mono", "SF Mono", "JetBrains Mono", "Menlo", monospace;
  --sans: var(--mono);

  --content-width: 960px;
}

* { box-sizing: border-box; }
html, body {
  background: var(--bg);
  color: var(--ink);
  margin: 0;
  font: 15px/1.6 var(--mono);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
a {
  color: var(--ink);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color 0.15s ease;
}
a:hover { color: var(--accent); }

/* Site header (matches the parent randomstorms.net look) */
.site-head {
  border-bottom: 3px solid var(--line);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  position: sticky; top: 0; z-index: 5;
}
.site-head-inner {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 0 24px;
  height: 60px;
  display: flex; align-items: center; justify-content: space-between;
}
.site-brand {
  font-weight: 700; font-size: 13px;
  text-transform: uppercase; letter-spacing: 0.06em;
  text-decoration: none;
}
.site-brand:hover { color: var(--accent); }
.site-nav { display: flex; gap: 18px; font-size: 13px; }
.site-nav a { text-decoration: none; }

.academic { max-width: var(--content-width); margin: 0 auto; padding: 48px 24px 96px; }

.academic-head { margin-bottom: 48px; }
.academic-head h1 {
  font-family: var(--mono); font-weight: 700;
  font-size: 32px; line-height: 1.15;
  letter-spacing: -0.01em;
  margin: 0 0 12px;
}
.academic-sub { font-size: 13px; color: var(--muted); margin: 0; }
.academic-empty { color: var(--muted); font-style: italic; }
.academic-footer {
  color: var(--muted); font-size: 12px;
  margin-top: 80px; padding-top: 16px;
  border-top: 1px solid var(--line-soft);
}

.back-link {
  font-size: 13px;
  margin-bottom: 24px;
  text-transform: uppercase; letter-spacing: 0.06em;
}

/* ───────── HOME-style sections (paper_manager browse interface) ───────── */
.rec-row { margin-bottom: 40px; }
.rec-head {
  display: flex; align-items: baseline; gap: 12px;
  padding-bottom: 8px;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--line);
}
.rec-num {
  font-size: 11px; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.12em;
  color: var(--muted);
}
.rec-count {
  margin-left: auto;
  font-size: 11px; color: var(--muted);
}

/* Hero card — featured paper at the top */
.hero-row { margin-bottom: 40px; }
.hero-card {
  display: block;
  padding: 24px;
  border: 3px solid var(--line);
  background: var(--bg);
  color: var(--ink);
  text-decoration: none;
  transition: background 80ms linear, color 80ms linear;
}
.hero-card:hover {
  background: var(--ink);
  color: var(--bg);
  text-decoration: none;
}
.hero-card:hover .hero-meta,
.hero-card:hover .hero-tldr,
.hero-card:hover .hero-cta { color: var(--bg); }
.hero-title {
  font-size: 22px; font-weight: 700; line-height: 1.2;
  letter-spacing: -0.01em;
  margin-bottom: 10px;
}
.hero-meta { font-size: 12px; color: var(--muted); margin-bottom: 12px; }
.hero-meta em { font-style: italic; }
.hero-tldr {
  font-size: 14px; line-height: 1.6;
  color: var(--ink-soft);
  margin: 12px 0;
}
.hero-cta {
  display: inline-block;
  margin-top: 8px;
  font-size: 12px; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.08em;
  color: var(--accent);
}

/* Recommendation strip (horizontal scroll of cards) */
.rec-strip {
  display: flex;
  gap: 0;
  overflow-x: auto;
  padding-bottom: 6px;
  scrollbar-width: thin;
  scrollbar-color: var(--ink) transparent;
}
.rec-strip::-webkit-scrollbar { height: 6px; }
.rec-strip::-webkit-scrollbar-thumb { background: var(--ink); }
.rec-card {
  flex: 0 0 240px;
  display: block;
  padding: 14px 16px 16px;
  border: 1px solid var(--ink);
  border-right-width: 0;
  background: var(--bg);
  color: var(--ink);
  text-decoration: none;
  transition: background 80ms linear, color 80ms linear;
}
.rec-card:last-child { border-right-width: 1px; }
.rec-card:hover {
  background: var(--ink);
  color: var(--bg);
  text-decoration: none;
}
.rec-card:hover .card-num,
.rec-card:hover .card-meta { color: var(--bg); opacity: 0.85; }
.rec-card:hover .tag { color: var(--bg); border-color: var(--bg); }
.card-num {
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--muted);
  display: block;
  margin-bottom: 8px;
}
.card-title {
  font-weight: 700; font-size: 14px;
  line-height: 1.3; letter-spacing: -0.005em;
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 4;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.card-meta { font-size: 11px; color: var(--muted); margin-bottom: 6px; }
.card-tags { margin-top: 8px; }
.tag {
  display: inline-block;
  font-size: 9px;
  text-transform: uppercase; letter-spacing: 0.05em;
  color: var(--ink);
  border: 1px solid var(--ink);
  padding: 1px 6px;
  margin: 2px 3px 0 0;
}

/* Topic strip (clickable tag chips) */
.topic-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.topic-chip {
  border: 1px solid var(--ink);
  padding: 6px 12px;
  font-size: 11px;
  text-transform: uppercase; letter-spacing: 0.06em;
  color: var(--ink);
  text-decoration: none;
  background: transparent;
}
.topic-chip:hover { background: var(--ink); color: var(--bg); }
.topic-chip .topic-count { color: var(--muted); margin-left: 8px; font-size: 10px; }
.topic-chip:hover .topic-count { color: var(--bg); }

.entry-tag.code {
  background: var(--ink);
  color: var(--bg);
}

.year-block { margin-bottom: 48px; }
.year-heading {
  font-size: 12px; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.12em;
  color: var(--muted);
  margin: 0 0 18px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--line-soft);
}

.paper-entry { padding: 16px 0; border-bottom: 1px solid var(--line-soft); }
.paper-entry-head {
  display: grid;
  grid-template-columns: 60px 1fr;
  gap: 18px;
  cursor: pointer;
  align-items: flex-start;
}
.paper-thumb {
  width: 60px; height: 60px;
  border: 1px solid var(--ink);
  background: #fafafa;
}
.paper-entry-title {
  font-weight: 700;
  font-size: 16px; line-height: 1.3;
  margin-bottom: 4px;
}
.paper-entry-meta { font-size: 12px; color: var(--muted); line-height: 1.5; }
.paper-entry-meta .venue em { font-style: italic; }
.paper-entry-tldr { margin: 6px 0; font-size: 13px; line-height: 1.55; color: var(--ink-soft); max-width: 720px; }
.paper-entry-links {
  font-size: 11px;
  text-transform: uppercase; letter-spacing: 0.06em;
  color: var(--muted);
  display: flex; flex-wrap: wrap; gap: 10px; align-items: center;
}
.paper-entry-links a { color: var(--ink); }
.entry-tag {
  font-size: 10px;
  text-transform: uppercase; letter-spacing: 0.06em;
  color: var(--ink);
  border: 1px solid var(--ink);
  padding: 1px 7px;
  background: transparent;
}

.paper-entry-body {
  display: none;
  margin: 16px 0 0 78px;
  padding: 20px 24px;
  border: 1px solid var(--ink);
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink);
}
.paper-entry.expanded .paper-entry-body { display: block; }

.summary-md h1 { font-size: 0; margin: 0; }
.summary-md h2 {
  font-size: 11px; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.12em;
  color: var(--muted);
  margin: 24px 0 8px; padding-bottom: 4px;
  border-bottom: 1px solid var(--line-soft);
}
.summary-md p { margin: 6px 0 12px; }
.summary-md strong { font-weight: 700; color: var(--ink); }
.summary-md ul, .summary-md ol { margin: 6px 0 12px 20px; padding: 0; }
.summary-md li { margin: 3px 0; }
.summary-md em { font-style: italic; }
.summary-md code { background: #f0f0f0; padding: 1px 5px; border: 1px solid var(--line-soft); font-size: 12px; }

.academic-auto h4 {
  font-size: 11px; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.12em;
  color: var(--muted); margin: 18px 0 6px;
}
.academic-auto ul { margin: 0 0 10px 20px; padding: 0; }
.academic-auto li { margin: 3px 0; }

.figures-block { margin-top: 28px; padding-top: 20px; border-top: 1px solid var(--line-soft); }
.figures-head {
  font-size: 11px; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.12em;
  color: var(--muted); margin: 0 0 12px;
}
.figures-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 14px;
}
.figure-tile {
  margin: 0;
  border: 1px solid var(--ink);
  padding: 6px;
  display: flex; flex-direction: column;
}
.figure-tile a { display: block; line-height: 0; }
.figure-tile img { width: 100%; height: auto; display: block; background: #fff; }
.figure-tile figcaption {
  font-size: 10px;
  text-transform: uppercase; letter-spacing: 0.06em;
  color: var(--muted);
  margin-top: 6px;
}

.paper-detail header { margin-bottom: 24px; padding-bottom: 14px; border-bottom: 1px solid var(--line); }
.paper-detail header h1 {
  font-weight: 700; font-size: 24px; line-height: 1.2;
  letter-spacing: -0.01em; margin: 0 0 12px;
}
.paper-detail-meta { font-size: 13px; color: var(--muted); margin: 0 0 10px; }