:root {
  color-scheme: light;
  --bg: #f6f7f3;
  --panel: #ffffff;
  --ink: #1f2933;
  --muted: #667085;
  --line: #d8ded6;
  --accent: #0f766e;
  --accent-dark: #115e59;
  --soft: #e7f3ef;
  --warn-bg: #fff3e6;
  --warn-line: #f5bd75;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.5;
}

.app-shell {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 32px 0 56px;
}

.search-panel,
.results-panel,
.document-panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 18px 40px rgba(31, 41, 51, 0.07);
}

.search-panel,
.document-panel {
  padding: 28px;
}

.results-panel {
  margin-top: 22px;
  padding: 24px;
}

.heading-row,
.result-summary,
.document-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
}

.eyebrow {
  margin: 0 0 4px;
  color: var(--accent-dark);
  font-size: 0.78rem;
  font-weight: 760;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.18;
  letter-spacing: 0;
}

h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
}

h2 {
  font-size: clamp(1.45rem, 3vw, 2.2rem);
}

h3 {
  font-size: 0.96rem;
}

.document-panel {
  max-width: 900px;
  margin: 0 auto;
}

.document-panel a {
  color: var(--accent-dark);
  font-weight: 720;
}

.document-panel p,
.document-panel li {
  color: #344054;
}

.document-panel h2 {
  margin-top: 28px;
}

.document-panel h3 {
  margin-top: 18px;
}

.document-panel pre {
  max-height: none;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 14px;
  background: #fbfcfa;
}

.document-panel code {
  color: #344054;
  font: 0.9em ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

.document-panel hr {
  margin: 28px 0 0;
  border: 0;
  border-top: 1px solid var(--line);
}

.byline {
  margin-top: 18px;
  color: var(--muted);
}

.pubmed-link,
.secondary-button,
.primary-button,
.clear-button {
  display: inline-flex;
  min-height: 42px;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  border: 1px solid transparent;
  padding: 0 16px;
  font-weight: 720;
  text-decoration: none;
  white-space: nowrap;
}

.pubmed-link,
.secondary-button,
.clear-button {
  border-color: var(--line);
  color: var(--accent-dark);
  background: #fff;
}

.primary-button {
  background: var(--accent);
  color: #fff;
  cursor: pointer;
  font-size: 1rem;
}

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

.button-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
  margin-top: 18px;
}

.clear-button:hover {
  border-color: var(--accent);
}

.search-form {
  margin-top: 26px;
}

.field-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.field {
  display: grid;
  gap: 8px;
}

.field span,
.segmented-control legend {
  color: #344054;
  font-size: 0.92rem;
  font-weight: 720;
}

.field small {
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 650;
}

.field-note {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 0.9rem;
}

textarea {
  width: 100%;
  min-height: 144px;
  resize: vertical;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 12px 13px;
  color: var(--ink);
  font: inherit;
}

textarea:focus,
button:focus-visible,
a:focus-visible,
input:focus-visible + span {
  outline: 3px solid rgba(15, 118, 110, 0.25);
  outline-offset: 2px;
}

.segmented-control {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
  margin: 18px 0 0;
  padding: 0;
  border: 0;
}

.segmented-control legend {
  grid-column: 1 / -1;
  margin-bottom: 2px;
}

.segmented-control label {
  min-width: 0;
}

.segmented-control input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.segmented-control span {
  display: flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0 10px;
  color: #344054;
  font-weight: 720;
  text-align: center;
  cursor: pointer;
}

.segmented-control input:checked + span {
  border-color: var(--accent);
  background: var(--soft);
  color: var(--accent-dark);
}

.alert {
  margin-top: 18px;
  border: 1px solid var(--warn-line);
  border-radius: 6px;
  padding: 10px 14px;
  background: var(--warn-bg);
}

.alert p {
  margin: 0;
}

.query-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 20px;
}

.query-grid article {
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 14px;
  background: #fbfcfa;
}

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

.result-meta-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  margin-top: 16px;
  padding: 0 2px;
}

.result-meta-row p {
  margin: 0;
  color: var(--muted);
  font-size: 0.98rem;
  font-weight: 720;
}

.page-status-group,
.inline-pagination {
  display: flex;
  align-items: center;
  gap: 10px;
}

.inline-pagination .secondary-button {
  min-height: 36px;
}

pre {
  max-height: 240px;
  margin: 10px 0 0;
  overflow: auto;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  color: #344054;
  font: 0.88rem/1.5 ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

.citation-list {
  display: grid;
  gap: 12px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.citation-list li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 8px;
  border-top: 1px solid var(--line);
  padding-top: 14px;
}

.result-number {
  color: var(--ink);
  font-weight: 760;
}

.citation-list a {
  color: var(--accent-dark);
  font-weight: 760;
}

.citation-list p,
.empty-state {
  margin: 6px 0 0;
  color: var(--muted);
}

.journal-line {
  font-size: 0.92rem;
}

.pagination-row {
  display: flex;
  gap: 10px;
  justify-content: flex-end;
  margin-top: 18px;
}

.site-footer {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 14px;
  justify-content: center;
  margin-top: 18px;
  color: #7a8694;
  font-size: 0.82rem;
}

.site-footer a {
  color: inherit;
}

@media (max-width: 760px) {
  .app-shell {
    width: min(100% - 20px, 1180px);
    padding-top: 10px;
  }

  .search-panel,
  .results-panel {
    padding: 18px;
  }

  .heading-row,
  .result-summary,
  .document-header {
    display: grid;
  }

  .field-grid,
  .segmented-control,
  .query-grid {
    grid-template-columns: 1fr;
  }

  .result-meta-row {
    display: grid;
    gap: 4px;
  }

  .page-status-group,
  .inline-pagination {
    flex-wrap: wrap;
  }

  .button-row {
    grid-template-columns: 1fr;
  }
}