:root {
  --bg: #f4f7fb;
  --panel: #ffffff;
  --text: #1d2838;
  --muted: #5a6883;
  --line: #d7e0ed;
  --brand: #0f6c8b;
  --brand-dark: #0b526a;
  --warn: #a86700;
  --danger: #9f2534;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  color: var(--text);
  background: linear-gradient(130deg, #e7f1ff, var(--bg) 45%, #f9fbfe);
}

.topbar {
  max-width: 1200px;
  margin: 20px auto 0;
  padding: 0 16px;
}

.topbar h1 {
  margin: 0;
  font-size: 1.9rem;
}

.topbar p {
  margin-top: 8px;
  color: var(--muted);
}

.layout {
  max-width: 1200px;
  margin: 14px auto 30px;
  padding: 0 16px;
  display: grid;
  gap: 14px;
  grid-template-columns: 1.5fr 1fr;
}

.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 14px;
}

.search-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px;
}

.search-row input,
select {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px;
  font: inherit;
}

.toolbar-row {
  margin-top: 10px;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

button {
  border: none;
  border-radius: 10px;
  padding: 9px 12px;
  font: inherit;
  cursor: pointer;
  background: var(--brand);
  color: #fff;
}

button:hover {
  background: var(--brand-dark);
}

button.secondary {
  background: #fff;
  color: var(--text);
  border: 1px solid var(--line);
}

button.secondary:hover {
  background: #eef3fa;
}

button.danger {
  background: #fff;
  color: var(--danger);
  border: 1px solid #efc4cb;
}

button.danger:hover {
  background: #fdeef0;
}

.status-card {
  margin-top: 12px;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px;
  background: #fbfdff;
}

.status-line {
  display: flex;
  justify-content: space-between;
  font-size: 0.95rem;
}

progress {
  width: 100%;
  margin-top: 8px;
  height: 14px;
}

#statusText {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 0.93rem;
}

.results,
.saved-list {
  display: grid;
  gap: 10px;
}

.paper-card,
.saved-card {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px;
  background: #fcfdff;
}

.paper-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.select-wrap {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.9rem;
}

.meta-chip {
  font-size: 0.8rem;
  color: #0b5872;
  background: #e2f2f8;
  border-radius: 999px;
  padding: 3px 8px;
}

.paper-title,
.saved-title {
  margin: 8px 0 0;
  font-size: 1.05rem;
}

.paper-meta,
.paper-extra,
.saved-meta {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.paper-warning {
  margin: 8px 0 0;
  color: var(--warn);
  font-size: 0.9rem;
}

.paper-link {
  display: inline-block;
  margin-top: 8px;
  color: var(--brand);
  text-decoration: none;
}

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

.side-actions {
  margin: 10px 0;
}

.citation-block {
  margin-top: 10px;
}

.citation-text,
.intext-text {
  margin: 6px 0 0;
  padding: 8px;
  border: 1px solid var(--line);
  border-radius: 8px;
  white-space: pre-wrap;
  word-break: break-word;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.85rem;
  background: #fff;
}

.saved-actions {
  margin-top: 10px;
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.empty {
  color: var(--muted);
  font-size: 0.95rem;
}

@media (max-width: 950px) {
  .layout {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 600px) {
  .search-row {
    grid-template-columns: 1fr;
  }

  .saved-actions button {
    width: 100%;
  }
}