:root {
  --ink: #1e2733;
  --muted: #5c6673;
  --paper: #f4f6fb;
  --card: #ffffff;
  --line: #d8dee8;
  --accent: #1d5fbf;
  --accent-dark: #164b96;
  --hit: #b20f21;
  --shadow: 0 12px 26px rgba(28, 41, 62, 0.11);
  --sans: "IBM Plex Sans", "Source Sans 3", "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: var(--sans);
  background: radial-gradient(circle at top right, #fff 0%, var(--paper) 68%);
}

.pg-app {
  min-height: 100vh;
  padding: 22px clamp(16px, 3.5vw, 40px) 28px;
  display: grid;
  gap: 16px;
}

.pg-hero,
.search-card,
.filters,
.results-panel {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  box-shadow: var(--shadow);
}

.pg-hero {
  padding: 18px 20px;
  display: flex;
  gap: 14px;
  justify-content: space-between;
  align-items: start;
}

h1 {
  margin: 0;
  font-size: clamp(1.45rem, 2.4vw, 2.15rem);
}

.subhead {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.ghost {
  text-decoration: none;
  border: 1px solid var(--line);
  color: var(--accent-dark);
  padding: 9px 12px;
  border-radius: 10px;
  font-size: 0.9rem;
  background: #f9fbff;
}

.search-card {
  padding: 16px 18px;
  display: grid;
  gap: 14px;
}

.input-row {
  display: flex;
  gap: 12px;
  align-items: end;
  flex-wrap: wrap;
}

.field {
  display: grid;
  gap: 6px;
  min-width: 210px;
}

.field.grow {
  flex: 1 1 420px;
}

.field span {
  font-size: 0.82rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--muted);
}

input[type="text"],
input[type="number"] {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px 11px;
  font-size: 1rem;
  color: var(--ink);
  background: #fff;
}

.btn-primary {
  border: none;
  border-radius: 10px;
  padding: 11px 16px;
  color: #fff;
  background: linear-gradient(160deg, var(--accent), var(--accent-dark));
  font-weight: 600;
  cursor: pointer;
}

.options-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 9px 14px;
  align-items: center;
}

.options-grid label {
  display: flex;
  gap: 7px;
  align-items: center;
  color: var(--ink);
  font-size: 0.92rem;
}

.layout {
  display: grid;
  grid-template-columns: minmax(250px, 310px) minmax(0, 1fr);
  gap: 14px;
}

.filters {
  padding: 14px;
  max-height: calc(100vh - 90px);
  overflow: auto;
  position: sticky;
  top: 14px;
}

.pane-title {
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 600;
  margin-bottom: 8px;
}

.author-controls {
  display: flex;
  gap: 8px;
  margin: 8px 0 10px;
}

.author-controls button {
  border: 1px solid var(--line);
  background: #f7f9fd;
  color: var(--ink);
  border-radius: 8px;
  padding: 6px 10px;
  cursor: pointer;
}

.author-list {
  display: grid;
  gap: 7px;
  max-height: calc(100vh - 240px);
  overflow: auto;
}

.author-item {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 0.9rem;
}

.results-panel {
  padding: 14px;
}

.results-head {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px 12px;
  margin-bottom: 10px;
}

.status {
  font-weight: 600;
}

.small {
  font-size: 0.85rem;
}

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

.results-root {
  display: grid;
  gap: 12px;
}

.results-page {
  display: grid;
  gap: 12px;
}

.pagination-bar {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 8px 12px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #f7f9fc;
  padding: 8px 10px;
}

.pagination-summary {
  color: #4b5a70;
  font-size: 0.88rem;
  font-weight: 600;
}

.pagination-nav {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.page-btn {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--accent-dark);
  border-radius: 8px;
  padding: 5px 10px;
  font-size: 0.86rem;
  cursor: pointer;
}

.page-btn.active {
  background: #0f355f;
  color: #fff;
  border-color: #0f355f;
}

.page-btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.page-ellipsis {
  color: #6b798d;
  font-size: 0.9rem;
  padding: 0 3px;
}

.father-group {
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
}

.father-head {
  background: #f7f9fc;
  border-bottom: 1px solid var(--line);
  padding: 9px 12px;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  cursor: pointer;
}

.father-label {
  flex: 1;
}

.father-toggle {
  border: 1px solid var(--line);
  background: #ffffff;
  color: var(--accent-dark);
  border-radius: 8px;
  padding: 4px 10px;
  font-size: 0.84rem;
  cursor: pointer;
}

.result-card {
  padding: 11px 12px;
  border-top: 1px solid var(--line);
}

.result-card:first-child {
  border-top: none;
}

.result-citation {
  line-height: 1.5;
  margin-bottom: 7px;
}

.citation-main {
  margin-bottom: 2px;
}

.citation-sub {
  color: #46556b;
}

.result-citation b {
  font-weight: 700;
}

.result-citation a {
  color: var(--accent-dark);
  text-decoration: none;
}

.snippet {
  color: #3e4a5b;
  line-height: 1.55;
  font-size: 0.96rem;
}

.hit {
  color: var(--hit);
  font-weight: 700;
}

.snippet .grk-word {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px dotted rgba(22, 75, 150, 0.35);
}

.snippet .grk-word:hover {
  color: var(--accent-dark);
  border-bottom-color: var(--accent-dark);
}

.snippet .grk-word.hit-link {
  color: var(--hit);
  border-bottom-color: rgba(178, 15, 33, 0.5);
}

.expand-btn {
  margin-top: 8px;
  border: 1px solid var(--line);
  background: #fbfcff;
  color: var(--accent-dark);
  border-radius: 8px;
  padding: 6px 10px;
  cursor: pointer;
}

.expanded {
  margin-top: 9px;
  border-top: 1px dashed var(--line);
  padding-top: 8px;
  line-height: 1.6;
  white-space: pre-wrap;
}

code {
  background: #edf2fb;
  padding: 1px 5px;
  border-radius: 4px;
}

@media (max-width: 980px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .filters {
    position: static;
    max-height: none;
  }

  .author-list {
    max-height: 260px;
  }
}