:root {
  --bg: #f7f6f2;
  --bg-strong: #f0ede6;
  --paper: rgba(255, 255, 255, 0.9);
  --ink: #1f2b2b;
  --muted: #5c6867;
  --line: rgba(31, 43, 43, 0.12);
  --accent: #b6512c;
  --accent-deep: #8d3b1b;
  --accent-soft: rgba(182, 81, 44, 0.12);
  --teal: #1e6b69;
  --teal-soft: rgba(30, 107, 105, 0.12);
  --shadow: 0 10px 26px rgba(31, 43, 43, 0.06);
  --radius-lg: 22px;
  --radius-md: 18px;
  --radius-sm: 12px;
  --max-width: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Manrope", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(182, 81, 44, 0.06), transparent 24rem),
    radial-gradient(circle at top right, rgba(30, 107, 105, 0.07), transparent 22rem),
    linear-gradient(180deg, #faf9f6 0%, #f4f1eb 52%, #f8f7f4 100%);
}

a {
  color: inherit;
}

.page-shell {
  width: min(calc(100% - 2rem), var(--max-width));
  margin: 0 auto;
  padding: 1rem 0 4rem;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  margin: 0 0 1rem;
  padding: 1rem 0;
  backdrop-filter: blur(16px);
}

.brand {
  font-weight: 800;
  text-decoration: none;
  letter-spacing: 0.02em;
}

.top-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
}

.top-nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.95rem;
}

.panel {
  background: var(--paper);
  border: 1px solid rgba(31, 43, 43, 0.08);
  box-shadow: var(--shadow);
  border-radius: var(--radius-lg);
  padding: 2rem;
  margin-bottom: 1.25rem;
  position: relative;
  overflow: hidden;
}

.panel::after {
  content: "";
  position: absolute;
  inset: auto -8rem -8rem auto;
  width: 16rem;
  height: 16rem;
  background: radial-gradient(circle, rgba(182, 81, 44, 0.035), transparent 66%);
  pointer-events: none;
}

.hero {
  min-height: auto;
}

.eyebrow {
  margin: 0 0 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.75rem;
  font-weight: 800;
  color: var(--accent);
}

h1,
h2,
h3 {
  font-family: "Fraunces", serif;
  line-height: 1.05;
  margin: 0;
}

h1 {
  font-size: clamp(2.4rem, 4vw, 4rem);
  max-width: none;
}

h2 {
  font-size: clamp(1.6rem, 2.2vw, 2.2rem);
}

.hero-subtitle,
.section-intro,
.abstract-copy,
.copy-grid p,
.question-card p,
.outlook-card p,
.author-card p,
.paper-card p {
  color: var(--muted);
}

#overview .copy-grid p,
#overview .abstract-copy {
  text-align: justify;
  text-justify: inter-word;
}

.hero-subtitle {
  margin: 1rem 0 1.25rem;
  max-width: 72ch;
  font-size: 1rem;
  line-height: 1.7;
}

.hero-actions,
.pagination-bar,
.results-bar {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  min-height: 2.9rem;
  padding: 0 1.15rem;
  border-radius: 999px;
  border: 1px solid transparent;
  text-decoration: none;
  font-weight: 700;
  cursor: pointer;
  transition: transform 180ms ease, background 180ms ease, border-color 180ms ease;
}

.button:hover {
  transform: translateY(-1px);
}

.button-primary {
  background: var(--accent);
  color: #fffaf5;
}

.button-primary:hover {
  background: var(--accent-deep);
}

.button-secondary {
  background: rgba(255, 255, 255, 0.82);
  border-color: var(--line);
  color: var(--ink);
}

.button-small {
  min-height: 2.4rem;
  padding: 0 0.95rem;
}

.author-card,
.question-card,
.outlook-card,
.paper-card,
.controls-card {
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.86);
}

.section-heading {
  margin-bottom: 1.35rem;
}

.section-heading-tight {
  margin-top: 2rem;
}

.authors-grid,
.question-grid,
.outlook-grid,
.literature-grid,
.copy-grid {
  display: grid;
  gap: 1rem;
}

.authors-grid {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.copy-grid {
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.question-grid {
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.outlook-grid {
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

.literature-grid {
  grid-template-columns: repeat(auto-fit, minmax(235px, 1fr));
  margin-top: 1rem;
}

.author-card,
.question-card,
.outlook-card,
.paper-card {
  padding: 1.2rem;
}

.author-card h3,
.question-card h3,
.outlook-card h3,
.paper-card h3 {
  font-size: 1.15rem;
  margin-bottom: 0.65rem;
}

.author-meta,
.paper-meta,
.paper-tags,
.page-numbers {
  display: flex;
  gap: 0.45rem;
  flex-wrap: wrap;
}

.chip {
  display: inline-flex;
  align-items: center;
  min-height: 1.9rem;
  padding: 0 0.7rem;
  border-radius: 999px;
  background: rgba(182, 81, 44, 0.1);
  color: #9a4523;
  font-size: 0.82rem;
  font-weight: 700;
}

.chip-muted {
  background: var(--teal-soft);
  color: var(--teal);
}

.controls-card {
  padding: 1rem;
}

.search-row {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 0.85rem;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.field span {
  font-size: 0.9rem;
  font-weight: 700;
}

.field input,
.field select {
  min-height: 2.9rem;
  width: 100%;
  padding: 0 0.9rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line);
  background: #ffffff;
  color: var(--ink);
  font: inherit;
}

.results-bar {
  justify-content: space-between;
  margin-top: 0.9rem;
}

.results-summary {
  margin: 0;
  color: var(--muted);
}

.paper-card {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  padding: 0.78rem 0.82rem;
}

.paper-card h3 {
  font-size: 0.98rem;
  line-height: 1.35;
  margin-bottom: 0.1rem;
}

.paper-card .meta-line {
  margin: 0;
  font-size: 0.86rem;
  line-height: 1.45;
}

.paper-card .doi-link {
  color: var(--teal);
  text-decoration: none;
  font-weight: 700;
  word-break: break-all;
}

.paper-card .doi-link:hover {
  text-decoration: underline;
}

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

.paper-card .chip {
  min-height: 1.55rem;
  padding: 0 0.55rem;
  font-size: 0.74rem;
}

.pagination-bar {
  justify-content: center;
  margin-top: 1.4rem;
}

.page-number {
  min-width: 2.4rem;
  min-height: 2.4rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.6);
  font-weight: 700;
  cursor: pointer;
}

.page-number.is-active {
  background: var(--teal);
  color: white;
  border-color: var(--teal);
}

.empty-state {
  padding: 2rem;
  text-align: center;
  border: 1px dashed var(--line);
  border-radius: var(--radius-md);
  color: var(--muted);
  background: rgba(255, 255, 255, 0.78);
}

.fade-in {
  animation: rise 420ms ease both;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 980px) {
  .outlook-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .search-row {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 760px) {
  .page-shell {
    width: min(calc(100% - 1rem), var(--max-width));
  }

  .site-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .panel {
    padding: 1.25rem;
    border-radius: 22px;
  }

  .outlook-grid,
  .search-row {
    grid-template-columns: 1fr;
  }
}