:root {
  --page-bg: #f8fafc;
  --panel-bg: #eef2f7;
  --card-bg: #ffffff;
  --accent-bg: #e8f2ff;

  --text: #0f172a;
  --muted: #475569;
  --border: #e2e8f0;

  --accent: #548de8;
  --accent-soft: #dbeafe;

  --radius: 18px;
  --shadow: 0 8px 24px rgba(15, 23, 42, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;
  background: var(--page-bg);
  color: var(--text);
  line-height: 1.6;
}

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

a:hover {
  text-decoration: underline;
}

.shell {
  max-width: 1000px;
  margin: 0 auto;
  padding: 32px 20px;
}

/* Accessibility */
.skip-link {
  position: absolute;
  left: -999px;
  top: 10px;
  background: #fff;
  padding: 10px 14px;
  border-radius: 8px;
  z-index: 999;
}
.skip-link:focus {
  left: 10px;
}

/* HERO / PAGE INFO */

.hero {
  margin-bottom: 32px;
}

.hero-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 20px;
  flex-wrap: wrap;
}

h1 {
  margin: 0;
  font-size: 34px;
  letter-spacing: -0.02em;
}

.subtitle {
  margin: 6px 0 0 0;
  color: var(--muted);
  font-size: 16px;
}

.hero-actions {
  display: flex;
  gap: 12px;
}

.hero-card {
  margin-top: 20px;
  padding: 22px 24px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.lead {
  margin: 0 0 12px 0;
  font-size: 15px;
}

.muted {
  color: var(--muted);
}

.meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 14px;
}

/* BUTTONS */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 14px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  border: 1px solid var(--border);
  background: var(--card-bg);
  color: var(--text);
  cursor: pointer;
}

.btn:hover {
  background: var(--accent-soft);
}

.btn-secondary {
  background: var(--accent);
  color: #ffffff;
  border-color: var(--accent);
}

.btn-secondary:hover {
  background: #1d4ed8;
}

.btn-ghost {
  background: transparent;
}

.btn-small {
  font-size: 12.5px;
  padding: 8px 12px;
}

/* SECTIONS */

.section {
  margin-top: 36px;
}

.section-head {
  margin-bottom: 12px;
}

h2 {
  margin: 0;
  font-size: 22px;
  letter-spacing: -0.01em;
}

/* SEARCH + RESULTS PANEL */

#latest {
  background: var(--panel-bg);
  padding: 24px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.controls {
  margin-top: 16px;
  padding: 16px;
  background: var(--accent-bg);
  border-radius: var(--radius);
  border: 1px solid var(--border);

  display: grid;
  grid-template-columns: 1.4fr 0.8fr 0.8fr 0.8fr auto;
  gap: 12px;
  align-items: end;
}

@media (max-width: 900px) {
  .controls {
    grid-template-columns: 1fr 1fr;
  }
}

.label {
  display: block;
  font-size: 12px;
  margin-bottom: 6px;
  color: var(--muted);
}

input,
select {
  width: 100%;
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: #ffffff;
  font-size: 14px;
}

.controls-actions {
  grid-column: 1 / -1;
  display: flex;
  gap: 10px;
  justify-content: flex-end;
  flex-wrap: wrap;
  margin-top: 6px;
}


/* PAPERS */

.papers {
  margin-top: 20px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.paper-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  padding: 18px;

  display: grid;
  grid-template-columns: 1fr auto;
  gap: 16px;
}

@media (max-width: 760px) {
  .paper-card {
    grid-template-columns: 1fr;
  }
}

.paper-title {
  margin: 0;
  font-size: 16px;
}

.paper-meta {
  margin: 6px 0 10px 0;
  font-size: 13px;
  color: var(--muted);
}

.paper-side {
  display: flex;
  flex-direction: column;
  gap: 10px;
  align-items: flex-end;
}

@media (max-width: 760px) {
  .paper-side {
    align-items: flex-start;
  }
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.chip {
  padding: 6px 10px;
  border-radius: 999px;
  font-size: 12px;
  background: var(--accent-soft);
  color: var(--accent);
}

.chip-outline {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--muted);
}

.abstract {
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px solid var(--border);
  font-size: 13.5px;
}

/* ABOUT SECTION */

.details {
  background: var(--card-bg);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  padding: 18px;
}

.details summary {
  cursor: pointer;
  font-weight: 700;
  display: flex;
  justify-content: space-between;
  gap: 12px;
}

.details-body {
  margin-top: 16px;
}

.grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

@media (max-width: 900px) {
  .grid {
    grid-template-columns: 1fr;
  }
}

.card {
  background: var(--panel-bg);
  border-radius: var(--radius);
  padding: 18px;
  border: 1px solid var(--border);
}

.card.wide {
  grid-column: 1 / -1;
}

.card ul {
  margin: 0;
  padding-left: 18px;
}

.card li {
  margin: 8px 0;
}

/* FOOTER */

.footer {
  margin-top: 36px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  font-size: 13px;
}
.pager{
  margin-top: 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.pager button:disabled{
  opacity: 0.55;
  cursor: not-allowed;
}
.brand{
  display: flex;
  align-items: center;
  gap: 14px;
}

.logo{
  width: 100px;
  height: 100px;
  object-fit: contain;
  border-radius: 14px; /* optional: softens edges if logo has a box */
}
/* NEW: framing chip */
.chip-framing {
  background: var(--panel-bg);
  color: var(--text);
  border: 1px solid var(--border);
}

/* NEW: small info button inside chip */
.info-btn {
  margin-left: 6px;
  width: 18px;
  height: 18px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: #ffffff;
  color: var(--muted);
  font-size: 11px;
  font-weight: 700;
  line-height: 1;
  cursor: pointer;
}

.info-btn:hover {
  background: var(--accent-soft);
}

/* NEW: modal */
.modal {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.45);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  z-index: 9999;
}

.modal-card {
  width: 100%;
  max-width: 560px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 18px;
}

.modal-list {
  margin: 12px 0 16px 0;
  padding-left: 18px;
}
.modal[hidden] { display: none !important; }