:root {
  --bg: #f3efe6;
  --sheet: #fffdf8;
  --ink: #221e19;
  --muted: #5f584e;
  --line: #e4dacb;
  --green: #1d4a3c;
  --green-soft: #e7f2ec;
  --amber: #8a4e12;
  --amber-soft: #f8ecd8;
  --slate: #3d4c5c;
  --slate-soft: #e7eef3;
  --focus: #1d4a3c;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  font-size: 1.05rem;
  line-height: 1.5;
}

.wrap {
  max-width: 1080px;
  margin: 0 auto;
  padding: 2.4rem 1.2rem 4rem;
}

.kicker,
.byline,
.note,
.result-count,
.meta,
.chips,
.counts,
.matrix,
.search-label,
footer,
button,
input {
  font-family: "Segoe UI", "Helvetica Neue", Helvetica, Arial, sans-serif;
}

.kicker {
  margin: 0 0 0.4rem;
  color: var(--green);
  font-size: 0.78rem;
  font-weight: 650;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: clamp(2.4rem, 5vw, 4rem);
  font-weight: 560;
  letter-spacing: -0.03em;
  line-height: 0.95;
}

h2 {
  margin: 0;
  font-size: 1.45rem;
  font-weight: 560;
}

.paper-title {
  margin: 0.8rem 0 0.3rem;
  font-size: 1.2rem;
}

.byline,
.lede,
.note {
  color: var(--muted);
}

.byline { margin: 0; font-size: 0.92rem; }
.lede { max-width: 46rem; font-size: 1.08rem; color: var(--ink); }
.note { font-size: 0.92rem; }

.counts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 0.55rem;
  margin: 1.3rem 0 0.8rem;
  padding: 0;
  list-style: none;
}

.counts li {
  background: var(--sheet);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.7rem 0.8rem 0.55rem;
}

.counts strong {
  display: block;
  color: var(--ink);
  font-size: 1.45rem;
  line-height: 1;
}

.counts span {
  display: block;
  margin-top: 0.28rem;
  color: var(--muted);
  font-size: 0.78rem;
}

.panel {
  background: var(--sheet);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 1rem 1rem 0.9rem;
  margin: 1.1rem 0;
}

.search-label {
  display: block;
  margin-bottom: 0.4rem;
  font-size: 0.82rem;
  font-weight: 650;
}

input[type="search"] {
  width: 100%;
  border: 1px solid #d9cdb8;
  border-radius: 8px;
  background: #fff;
  color: var(--ink);
  font-size: 1rem;
  padding: 0.7rem 0.8rem;
}

input[type="search"]:focus,
button:focus-visible,
a:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.75rem;
}

.chips button,
#clear-cell {
  border: 1px solid #d9cdb8;
  background: #fff;
  color: var(--ink);
  border-radius: 999px;
  padding: 0.32rem 0.7rem;
  font-size: 0.82rem;
  cursor: pointer;
}

.chips button[aria-checked="true"] {
  background: var(--green);
  border-color: var(--green);
  color: #fff;
}

.result-count { margin: 0.75rem 0 0; font-size: 0.88rem; }

.section-head {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: center;
}

.section-count {
  color: var(--muted);
  font-family: "Segoe UI", sans-serif;
  font-size: 0.95rem;
  font-weight: 450;
}

.matrix-scroll { overflow-x: auto; margin-top: 0.6rem; }

.matrix {
  border-collapse: collapse;
  width: 100%;
  min-width: 860px;
  font-size: 0.75rem;
}

.matrix th,
.matrix td {
  border-bottom: 1px solid var(--line);
  padding: 0.25rem;
  text-align: center;
  vertical-align: bottom;
}

.matrix th {
  color: var(--muted);
  font-weight: 650;
  line-height: 1.2;
}

.matrix .row-label {
  text-align: left;
  color: var(--ink);
  min-width: 11rem;
  padding-right: 0.6rem;
}

.matrix button {
  width: 100%;
  min-height: 2rem;
  border: 0;
  border-radius: 6px;
  background: rgba(29, 74, 60, var(--ink-alpha, 0.08));
  color: var(--ink);
  font-weight: 700;
  cursor: pointer;
}

.matrix button[aria-pressed="true"] {
  outline: 2px solid var(--green);
  outline-offset: -2px;
}

.matrix button.is-zero {
  background: transparent;
  color: #9a9186;
  font-weight: 550;
}

.entry {
  padding: 0.95rem 0;
  border-top: 1px solid var(--line);
}

.entry h3 {
  margin: 0;
  font-size: 1.12rem;
  font-weight: 560;
  letter-spacing: -0.01em;
  line-height: 1.3;
}

.entry a { color: var(--green); text-underline-offset: 0.14em; }
.entry a:hover { color: #12352b; }

.authors { margin: 0.2rem 0 0; }
.meta { margin: 0.15rem 0 0; color: var(--muted); font-size: 0.88rem; }

.badges, .tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-top: 0.45rem;
}

.badge, .tag {
  border-radius: 999px;
  padding: 0.12rem 0.5rem;
  font-family: "Segoe UI", sans-serif;
  font-size: 0.75rem;
}

.badge-cited { background: var(--green-soft); color: var(--green); }
.badge-repo { background: var(--amber-soft); color: var(--amber); }
.badge-bench { background: var(--slate-soft); color: var(--slate); }
.badge-plain { background: #f3efe6; color: var(--muted); }
.tag { background: #f6f1e8; color: #3f3830; }

.empty {
  color: var(--muted);
  border-top: 1px solid var(--line);
  padding-top: 0.8rem;
}

footer {
  margin-top: 2rem;
  color: var(--muted);
  font-size: 0.88rem;
}

@media (max-width: 640px) {
  .wrap { padding-top: 1.4rem; }
  .section-head { align-items: flex-start; flex-direction: column; }
}