:root {
  --paper: #f6f0e3;
  --paper-soft: #fbf8ef;
  --ink: #26302c;
  --ink-soft: #53645d;
  --blue: #55778a;
  --blue-dark: #365c70;
  --blue-soft: #c4d5d8;
  --green: #7f9270;
  --gold: #c8a24b;
  --earth: #8a6d52;
  --line: rgba(38, 48, 44, 0.16);
  --line-strong: rgba(38, 48, 44, 0.28);
  --shadow: rgba(64, 55, 42, 0.08);
  --font-serif: Georgia, "Iowan Old Style", "Palatino Linotype", serif;
  --font-sans: Aptos, "Segoe UI", Inter, "Helvetica Neue", Arial, sans-serif;
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--paper);
}

body {
  min-height: 100vh;
  margin: 0;
  background:
    linear-gradient(180deg, rgba(255, 252, 244, 0.9), rgba(246, 240, 227, 0.94)),
    var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: 0.24;
  background-image:
    linear-gradient(rgba(138, 109, 82, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(138, 109, 82, 0.035) 1px, transparent 1px);
  background-size: 36px 36px;
}

a {
  color: var(--blue);
  text-decoration-color: rgba(85, 119, 138, 0.36);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.22em;
}

a:hover {
  color: var(--blue-dark);
  text-decoration-color: currentColor;
}

a:focus-visible,
button:focus-visible,
input:focus,
select:focus,
summary:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
}

h1,
h2,
h3,
p {
  margin: 0;
}

button,
input,
select {
  font: inherit;
}

.skip-link {
  position: absolute;
  top: 1rem;
  left: 1rem;
  z-index: 30;
  padding: 0.6rem 0.85rem;
  border: 1px solid var(--line-strong);
  background: var(--paper-soft);
  color: var(--ink);
  transform: translateY(-150%);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid var(--line);
  background: rgba(246, 240, 227, 0.92);
  backdrop-filter: blur(14px);
}

.site-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  width: min(1120px, 100% - 2rem);
  margin: 0 auto;
  padding: 1rem 0;
}

.site-mark {
  display: grid;
  gap: 0.1rem;
  color: var(--ink);
  text-decoration: none;
}

.site-mark span {
  font-family: var(--font-serif);
  font-size: 1.18rem;
}

.site-mark small,
.site-links a,
.site-footer small {
  color: var(--ink-soft);
  font-size: 0.9rem;
}

.site-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 1.15rem;
}

.site-links a {
  text-decoration: none;
}

.site-links a:hover {
  color: var(--ink);
  text-decoration: underline;
}

.page-container {
  width: min(1180px, 100% - 2rem);
  margin: 0 auto;
  padding: 4.5rem 0 6rem;
}

.page-intro {
  display: grid;
  gap: 1.35rem;
  padding-bottom: 3rem;
  border-bottom: 1px solid var(--line);
}

.eyebrow {
  color: var(--earth);
  font-size: 0.9rem;
  font-weight: 800;
  letter-spacing: 0;
}

.intro-copy {
  display: grid;
  gap: 0.9rem;
  max-width: 760px;
  color: var(--ink-soft);
  font-size: 1.06rem;
  line-height: 1.85;
}

.intro-details {
  margin-top: 0.2rem;
  color: var(--ink-soft);
  font-size: 0.94rem;
}

.intro-details summary {
  width: fit-content;
  color: var(--earth);
  cursor: pointer;
  font-weight: 800;
}

.intro-details summary:hover {
  color: var(--ink);
}

.intro-details div {
  display: grid;
  gap: 0.45rem;
  margin-top: 0.7rem;
}

.updated-note {
  color: var(--earth);
  font-size: 0.95rem;
  font-weight: 800;
}

.arxiv-toolbar {
  display: grid;
  gap: 1rem;
  padding: 2rem 0;
  border-bottom: 1px solid var(--line);
}

.arxiv-stats {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.55rem 1rem;
  color: var(--earth);
  font-size: 0.92rem;
  font-weight: 800;
}

.arxiv-stats strong {
  color: var(--ink);
  font-weight: 900;
}

.filter-grid {
  display: grid;
  grid-template-columns: minmax(260px, 1.55fr) repeat(5, minmax(130px, 1fr));
  gap: 0.55rem;
  align-items: end;
}

.search-field,
.filter-row {
  display: grid;
  gap: 0.35rem;
}

label,
.filter-label {
  color: var(--earth);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

input,
select {
  width: 100%;
  min-height: 2.35rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(251, 248, 239, 0.72);
  color: var(--ink);
  padding: 0.46rem 0.78rem;
  font-size: 0.92rem;
  font-weight: 700;
  line-height: 1.2;
}

input::placeholder {
  color: rgba(83, 100, 93, 0.8);
  font-weight: 500;
}

input:hover,
select:hover {
  border-color: var(--line-strong);
}

.multi-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  max-height: 7.4rem;
  overflow: auto;
  padding: 0.1rem 0;
}

.multi-filter.compact {
  max-height: 5.4rem;
}

.filter-chip {
  position: relative;
  display: inline-flex;
  align-items: center;
  min-height: 2rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(251, 248, 239, 0.72);
  color: var(--ink-soft);
  cursor: pointer;
  padding: 0.36rem 0.62rem;
  font-size: 0.84rem;
  font-weight: 800;
  line-height: 1;
  text-transform: none;
  white-space: nowrap;
}

.filter-chip:hover {
  border-color: var(--line-strong);
  color: var(--ink);
}

.filter-chip:focus-within {
  outline: 2px solid var(--gold);
  outline-offset: 2px;
}

.filter-chip input {
  position: absolute;
  inset: 0;
  width: 100%;
  min-height: 0;
  height: 100%;
  margin: 0;
  border: 0;
  opacity: 0;
  cursor: pointer;
}

.filter-chip:has(input:checked) {
  border-color: rgba(85, 119, 138, 0.55);
  background: rgba(196, 213, 216, 0.42);
  color: var(--blue-dark);
}

.content-section {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  gap: 3rem;
  padding: 3rem 0;
  border-bottom: 1px solid var(--line);
}

.section-heading {
  min-width: 0;
}

.section-heading h2 {
  color: var(--earth);
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 500;
  line-height: 1.25;
}

.result-count {
  margin-top: 0.55rem;
  color: var(--ink-soft);
  font-size: 0.92rem;
  font-weight: 700;
}

.section-body {
  min-width: 0;
}

.items-list,
.rail-list {
  display: grid;
  gap: 1rem;
}

.item-card {
  display: grid;
  gap: 1rem;
  padding: 1.2rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(251, 248, 239, 0.8);
}

.item-card.deadline-soon {
  border-color: rgba(200, 162, 75, 0.7);
  box-shadow: 0 14px 36px var(--shadow);
}

.item-card.expired {
  opacity: 0.7;
}

.card-top,
.arxiv-kicker,
.tag-row,
.card-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
}

.card-top {
  justify-content: space-between;
  gap: 0.8rem 1rem;
}

.arxiv-kicker {
  gap: 0.45rem 0.7rem;
  margin-bottom: 0.4rem;
  color: var(--earth);
  font-size: 0.82rem;
  font-weight: 800;
  text-transform: uppercase;
}

.item-title {
  max-width: 880px;
  margin: 0;
  font-family: var(--font-serif);
  font-size: 1.28rem;
  font-weight: 500;
  line-height: 1.35;
}

.summary {
  color: var(--ink-soft);
}

.meta-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.85rem;
  margin: 0;
}

.meta {
  min-width: 0;
}

.meta dt,
.meta b,
.paper-body h4 {
  color: var(--earth);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.meta dd {
  margin: 0.1rem 0 0;
  color: var(--ink);
  font-size: 0.95rem;
}

.tag-row {
  gap: 0.45rem;
}

.pill,
.status-badge {
  display: inline-flex;
  align-items: center;
  min-height: 1.65rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.32rem 0.55rem;
  color: var(--ink);
  font-size: 0.82rem;
  font-weight: 800;
  line-height: 1;
}

.pill.type,
.pill.tag {
  background: rgba(196, 213, 216, 0.34);
  color: var(--blue-dark);
}

.status-badge {
  color: var(--earth);
  text-transform: lowercase;
}

.status-badge.deadline_soon {
  border-color: rgba(200, 162, 75, 0.72);
  background: rgba(200, 162, 75, 0.12);
  color: #7c5a19;
}

.status-badge.expired {
  color: var(--ink-soft);
}

.paper-body {
  display: grid;
  gap: 0.3rem;
}

.card-actions {
  gap: 0.75rem 1rem;
  color: var(--earth);
  font-size: 0.92rem;
  font-weight: 800;
}

.card-actions a {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.45rem 0.68rem;
  color: var(--ink);
  font-size: 0.9rem;
  line-height: 1;
  text-decoration: none;
}

.card-actions a:hover {
  border-color: var(--line-strong);
  text-decoration: underline;
}

.rail-item {
  display: grid;
  gap: 0.35rem;
  padding: 1rem 0;
  border-top: 1px solid var(--line);
}

.rail-item:first-child {
  border-top: 0;
  padding-top: 0;
}

.deadline-list .rail-item.soon {
  padding-left: 0.75rem;
  border-left: 3px solid var(--gold);
}

.rail-title {
  color: var(--ink);
  font-family: var(--font-serif);
  font-size: 1.05rem;
  font-weight: 500;
  line-height: 1.3;
}

.rail-meta {
  color: var(--ink-soft);
  font-size: 0.9rem;
}

.empty-state {
  color: var(--ink-soft);
  text-align: center;
}

.site-footer {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem 2rem;
  width: min(1120px, 100% - 2rem);
  margin: 0 auto;
  padding: 2rem 0 2.75rem;
  border-top: 1px solid var(--line);
  color: var(--ink-soft);
}

.site-footer p:first-child {
  color: var(--ink);
  font-family: var(--font-serif);
}

@media (max-width: 980px) {
  .filter-grid,
  .content-section {
    grid-template-columns: 1fr;
  }

  .filter-grid {
    gap: 0.8rem;
  }

  .search-field {
    grid-column: auto;
  }
}

@media (max-width: 640px) {
  body {
    font-size: 15px;
  }

  .site-nav {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.9rem;
    width: min(100% - 1.2rem, 1120px);
  }

  .site-links {
    justify-content: flex-start;
    gap: 0.85rem;
  }

  .page-container {
    width: min(100% - 1.2rem, 1120px);
    padding: 3.5rem 0 4.5rem;
  }

  .page-intro {
    padding-bottom: 2rem;
  }

  .meta-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.55rem 0.75rem;
  }

  .meta-grid .meta:last-child:nth-child(odd) {
    grid-column: 1 / -1;
  }

  .item-card {
    gap: 0.8rem;
    padding: 0.95rem;
  }

  .item-title {
    font-size: 1.12rem;
  }

  .tag-row {
    gap: 0.35rem;
  }

  .pill,
  .status-badge {
    padding: 0.28rem 0.46rem;
    font-size: 0.76rem;
  }

  .site-footer {
    flex-direction: column;
    width: min(100% - 1.2rem, 1120px);
  }
}