:root {
  color-scheme: light;
  --bg: #f7f8fa;
  --surface: #ffffff;
  --surface-soft: #f3f5f8;
  --surface-muted: #fafbfc;
  --border: #e4e7ec;
  --border-strong: #d6dae1;
  --text: #172033;
  --muted: #667085;
  --subtle: #98a2b3;
  --accent: #405cf5;
  --accent-hover: #3048d8;
  --accent-soft: #eef1ff;
  --success: #067647;
  --success-soft: #ecfdf3;
  --danger: #b42318;
  --danger-soft: #fff0ee;
  --warning: #a15c00;
  --shadow: 0 8px 28px rgba(16, 24, 40, 0.045);
  --sidebar-width: 212px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Microsoft YaHei", "Noto Sans CJK SC", Arial, sans-serif;
}

* { box-sizing: border-box; }
html { min-height: 100%; }
body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }
button, input, select, textarea { font: inherit; }
button, .button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  padding: 8px 13px;
  background: var(--surface);
  color: var(--text);
  text-decoration: none;
  cursor: pointer;
  transition: border-color .15s ease, background .15s ease, color .15s ease;
}
button:hover, .button:hover { border-color: #b9c0ca; }
button:disabled { cursor: not-allowed; opacity: .55; }
.primary-button {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.primary-button:hover { background: var(--accent-hover); border-color: var(--accent-hover); }
.secondary-button, .button.secondary { background: transparent; }
button.selected { background: var(--accent-soft); border-color: #cbd3ff; color: #3048d8; }
button.danger { background: var(--danger-soft); border-color: #ffd0ca; color: var(--danger); }

.app-shell { min-height: 100vh; }
.sidebar {
  position: fixed;
  inset: 0 auto 0 0;
  width: var(--sidebar-width);
  padding: 24px 16px 18px;
  background: var(--surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  z-index: 20;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 6px 34px;
  text-decoration: none;
}
.brand-mark {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  background: var(--accent);
  color: #fff;
  font-weight: 800;
  letter-spacing: -.04em;
}
.brand-copy { min-width: 0; }
.brand-copy strong, .brand-copy small { display: block; }
.brand-copy strong { font-size: .98rem; letter-spacing: -.015em; }
.brand-copy small { color: var(--subtle); margin-top: 2px; font-size: .7rem; }
.primary-nav { display: grid; gap: 4px; }
.primary-nav a, .settings-entry {
  display: grid;
  gap: 2px;
  padding: 10px 11px;
  border-radius: 9px;
  text-decoration: none;
  color: var(--muted);
}
.primary-nav a span, .settings-entry span { color: var(--text); font-weight: 650; font-size: .9rem; }
.primary-nav a small, .settings-entry small { font-size: .7rem; color: var(--subtle); }
.primary-nav a:hover, .settings-entry:hover { background: var(--surface-soft); }
.primary-nav a.active, .settings-entry.active { background: var(--accent-soft); }
.primary-nav a.active span, .settings-entry.active span { color: var(--accent-hover); }
.sidebar-spacer { flex: 1; }
.private-badge {
  display: flex;
  align-items: center;
  gap: 7px;
  margin: 0 8px 8px;
  color: var(--muted);
  font-size: .72rem;
}
.private-badge span { width: 7px; height: 7px; border-radius: 50%; background: #12b76a; }

.mobile-topbar, .mobile-nav { display: none; }
.content-wrap {
  min-height: 100vh;
  margin-left: var(--sidebar-width);
}
.content {
  width: min(100%, 1210px);
  margin: 0 auto;
  padding: 42px 48px 76px;
}

.page-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 22px;
  margin-bottom: 26px;
}
.page-header h1, .detail-title { margin: 0; letter-spacing: -.035em; }
.page-header h1 { font-size: clamp(1.75rem, 2.6vw, 2.25rem); line-height: 1.15; }
.page-header .muted { margin: 8px 0 0; max-width: 700px; }
.eyebrow {
  margin: 0 0 8px;
  color: var(--accent);
  font-size: .76rem;
  font-weight: 750;
  letter-spacing: .08em;
}
.muted { color: var(--muted); }
.today-header { margin-bottom: 17px; }
.today-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  padding: 12px 0 20px;
  color: var(--muted);
  font-size: .82rem;
  border-bottom: 1px solid var(--border);
}
.today-stats strong { color: var(--text); font-weight: 700; margin-right: 3px; }

.section-block { margin-top: 38px; }
.first-section { margin-top: 30px; }
.section-heading {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 18px;
  margin-bottom: 14px;
}
.section-heading h2 { margin: 0; font-size: 1.1rem; }
.section-heading p { margin: 5px 0 0; color: var(--muted); font-size: .82rem; }
.section-heading > a { color: var(--accent); font-size: .82rem; text-decoration: none; white-space: nowrap; }

.paper-list { display: grid; gap: 0; border: 1px solid var(--border); border-radius: 12px; overflow: hidden; background: var(--surface); }
.paper-card {
  display: flex;
  justify-content: space-between;
  gap: 28px;
  padding: 21px 22px;
  background: var(--surface);
  border-top: 1px solid var(--border);
}
.paper-card:first-child { border-top: 0; }
.paper-card:hover { background: #fdfdfe; }
.paper-skipped { opacity: .58; }
.paper-card-main { min-width: 0; flex: 1; }
.paper-meta-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 12px;
  color: var(--muted);
  font-size: .73rem;
}
.score-inline {
  min-width: 34px;
  padding: 2px 6px;
  border-radius: 6px;
  background: var(--accent-soft);
  color: var(--accent-hover);
  font-weight: 750;
  text-align: center;
}
.score-empty { color: var(--subtle); background: var(--surface-soft); }
.meta-accent { color: #7a4e00; font-weight: 650; }
.paper-card h3 { margin: 8px 0 0; line-height: 1.42; font-size: 1.06rem; font-weight: 680; }
.paper-card h3 a { text-decoration: none; }
.paper-card h3 a:hover { color: var(--accent-hover); }
.authors { margin: 8px 0 0; color: var(--muted); font-size: .8rem; line-height: 1.5; }
.summary { margin: 12px 0 0; line-height: 1.72; font-size: .91rem; }
.tag-row { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 12px; }
.tag {
  border-radius: 6px;
  padding: 3px 7px;
  background: var(--surface-soft);
  color: #556070;
  font-size: .7rem;
}
.secondary-tag { color: var(--subtle); background: transparent; border: 1px solid var(--border); }
.paper-card-actions { width: 94px; display: flex; flex-direction: column; gap: 7px; flex: 0 0 auto; }
.paper-card-actions form, .paper-card-actions button { width: 100%; }
.action-button { min-height: 34px; padding: 6px 8px; font-size: .78rem; }
.quiet-panel {
  padding: 18px 20px;
  border: 1px dashed var(--border-strong);
  border-radius: 10px;
  color: var(--muted);
  background: rgba(255,255,255,.5);
  font-size: .85rem;
}

.search-panel { margin-bottom: 18px; }
.search-row { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 8px; }
.filter-row { display: flex; justify-content: space-between; align-items: center; gap: 14px; margin-top: 12px; }
.segmented { display: flex; flex-wrap: wrap; gap: 4px; }
.segmented a, .tabs a, .settings-nav a {
  text-decoration: none;
  border-radius: 7px;
  padding: 7px 10px;
  color: var(--muted);
  font-size: .8rem;
}
.segmented a:hover, .tabs a:hover, .settings-nav a:hover { background: var(--surface-soft); color: var(--text); }
.segmented a.active, .tabs a.active, .settings-nav a.active { background: var(--accent-soft); color: var(--accent-hover); font-weight: 650; }
.filter-control { width: 160px; }
.tabs { display: flex; gap: 4px; margin-bottom: 16px; }

input, select, textarea {
  width: 100%;
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text);
  padding: 10px 11px;
  outline: none;
}
input:focus, select:focus, textarea:focus { border-color: #9faeff; box-shadow: 0 0 0 3px rgba(64,92,245,.08); }
input:disabled { background: var(--surface-soft); color: var(--muted); }
textarea { resize: vertical; min-height: 145px; line-height: 1.62; }

.empty-state {
  padding: 50px 30px;
  border: 1px dashed var(--border-strong);
  border-radius: 12px;
  text-align: center;
  background: rgba(255,255,255,.6);
}
.empty-state h3 { margin: 0 0 8px; font-size: 1rem; }
.empty-state p { margin: 0 0 14px; color: var(--muted); }
.pagination { margin-top: 20px; display: flex; align-items: center; justify-content: center; gap: 12px; color: var(--muted); font-size: .8rem; }

.detail-back { margin-bottom: 18px; color: var(--muted); font-size: .82rem; }
.detail-back a { text-decoration: none; }
.detail-layout { display: grid; grid-template-columns: minmax(0, 1fr) 240px; gap: 24px; }
.detail-main {
  min-width: 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 30px;
}
.detail-meta { display: flex; flex-wrap: wrap; gap: 8px 14px; color: var(--muted); font-size: .75rem; }
.detail-title { margin-top: 10px; font-size: clamp(1.8rem, 3.6vw, 2.45rem); line-height: 1.2; }
.detail-section { margin-top: 30px; padding-top: 24px; border-top: 1px solid var(--border); }
.detail-section h2 { margin: 0 0 10px; font-size: .95rem; }
.detail-section p { margin: 0; line-height: 1.78; }
.primary-analysis { border-top: 0; padding-top: 0; }
.abstract-details { margin-top: 30px; border-top: 1px solid var(--border); padding-top: 20px; }
.abstract-details summary { cursor: pointer; font-weight: 650; font-size: .92rem; }
.abstract { line-height: 1.8; color: #374151; }
.analysis-meta { margin-top: 28px; padding: 14px 16px; border-radius: 9px; background: var(--surface-soft); color: var(--muted); font-size: .78rem; }
.analysis-meta p { margin: 4px 0 0; line-height: 1.55; }
.detail-aside { display: grid; align-content: start; gap: 11px; }
.panel, .score-panel, .settings-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 11px;
  box-shadow: var(--shadow);
}
.panel { padding: 16px; }
.score-panel { padding: 18px; display: grid; grid-template-columns: 1fr auto; align-items: end; }
.score-panel span { grid-column: 1 / -1; color: var(--muted); font-size: .75rem; }
.score-panel strong { font-size: 2rem; letter-spacing: -.04em; margin-top: 5px; }
.score-panel small { color: var(--muted); padding-bottom: 5px; }
.panel-label { display: block; color: var(--muted); font-size: .75rem; }
.stack-actions { display: grid; gap: 7px; margin-top: 11px; }
.stack-actions form, .stack-actions button { width: 100%; }
.link-panel { display: grid; gap: 9px; font-size: .82rem; }
.link-panel a { text-decoration: none; color: var(--accent-hover); }

.settings-header { margin-bottom: 18px; }
.settings-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 3px;
  padding-bottom: 14px;
  margin-bottom: 22px;
  border-bottom: 1px solid var(--border);
}
.settings-form, .provider-list { display: grid; gap: 14px; }
.settings-card { padding: 22px; }
.settings-card-heading { display: flex; justify-content: space-between; gap: 18px; margin-bottom: 16px; }
.settings-card h2 { margin: 0; font-size: 1rem; }
.settings-card p { margin: 6px 0 0; color: var(--muted); line-height: 1.58; font-size: .82rem; }
.muted-card { background: var(--surface-muted); box-shadow: none; }
.form-actions { display: flex; gap: 9px; justify-content: flex-end; }
.split-actions { justify-content: space-between; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.form-grid label { display: grid; gap: 6px; }
.form-grid label > span { color: var(--muted); font-size: .78rem; }
.form-grid .full { grid-column: 1 / -1; }
.field-help { color: var(--muted); font-size: .72rem; }
.checkbox-stack { display: flex; align-items: end; gap: 16px; padding-bottom: 8px; }
.checkbox-row { display: flex !important; grid-auto-flow: column; align-items: center; gap: 7px !important; color: var(--text); }
.checkbox-row input { width: auto; }
.input-with-unit { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 8px; }
.input-with-unit span { color: var(--muted); font-size: .78rem; }

.notice {
  margin: 14px 0;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface-soft);
  color: var(--muted);
  font-size: .8rem;
  line-height: 1.58;
}
.notice.success { background: var(--success-soft); border-color: #abefc6; color: var(--success); }
.danger-notice { background: var(--danger-soft); border-color: #ffd0ca; color: var(--danger); }
.status-pill { align-self: start; padding: 4px 8px; border-radius: 999px; background: var(--surface-soft); color: var(--muted); font-size: .68rem; font-weight: 700; }
.status-pill.success { background: var(--success-soft); color: var(--success); }
.status-pill.danger { background: var(--danger-soft); color: var(--danger); }
.source-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 8px; }
.source-item { padding: 11px; border: 1px solid var(--border); border-radius: 8px; display: flex; align-items: center; gap: 8px; font-size: .8rem; }
.status-dot { width: 7px; height: 7px; border-radius: 50%; background: #12b76a; }
.provider-title-row { display: flex; align-items: center; flex-wrap: wrap; gap: 8px; }
.provider-actions { display: flex; gap: 8px; margin-top: 12px; }
.inline-success { color: var(--success); }
.inline-danger { color: var(--danger); }
.system-list { margin: 0; }
.system-list div { display: grid; grid-template-columns: 120px 1fr; gap: 14px; padding: 10px 0; border-top: 1px solid var(--border); }
.system-list div:first-child { border-top: 0; }
.system-list dt { color: var(--muted); font-size: .78rem; }
.system-list dd { margin: 0; overflow-wrap: anywhere; font-size: .8rem; }
.system-summary { display: grid; grid-template-columns: repeat(4, 1fr); gap: 9px; margin-bottom: 14px; }
.system-summary article { padding: 16px; background: var(--surface); border: 1px solid var(--border); border-radius: 10px; }
.system-summary span, .system-summary strong { display: block; }
.system-summary span { color: var(--muted); font-size: .72rem; }
.system-summary strong { margin-top: 5px; font-size: 1.2rem; }
.connection-result { display: grid; gap: 10px; margin-bottom: 14px; padding: 14px 16px; border: 1px solid var(--border); border-radius: 9px; background: var(--surface); }
.connection-result p { margin: 5px 0 0; color: var(--muted); }
.success-result { border-color: #abefc6; }
.failure-result { border-color: #ffd0ca; }
.connection-metrics { display: flex; gap: 12px; color: var(--muted); font-size: .76rem; }
.response-preview { display: block; white-space: pre-wrap; overflow-wrap: anywhere; padding: 9px; background: var(--surface-soft); border-radius: 7px; }
code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: .84em; }

@media (max-width: 980px) {
  .source-grid, .system-summary { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .filter-row { align-items: flex-start; flex-direction: column; }
  .filter-control { width: 220px; }
}

@media (max-width: 760px) {
  :root { --sidebar-width: 0px; }
  .sidebar { display: none; }
  .mobile-topbar {
    position: sticky;
    top: 0;
    z-index: 30;
    height: 54px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 16px;
    background: rgba(255,255,255,.96);
    border-bottom: 1px solid var(--border);
    backdrop-filter: blur(8px);
  }
  .mobile-brand { text-decoration: none; font-weight: 750; letter-spacing: -.02em; }
  .mobile-settings { text-decoration: none; color: var(--muted); font-size: .8rem; }
  .content-wrap { margin-left: 0; }
  .content { width: 100%; padding: 25px 16px 88px; }
  .mobile-nav {
    position: fixed;
    inset: auto 0 0 0;
    z-index: 40;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    padding: 7px 10px calc(7px + env(safe-area-inset-bottom));
    background: rgba(255,255,255,.97);
    border-top: 1px solid var(--border);
    backdrop-filter: blur(10px);
  }
  .mobile-nav a { padding: 8px; text-align: center; text-decoration: none; color: var(--muted); font-size: .78rem; border-radius: 8px; }
  .mobile-nav a.active { color: var(--accent-hover); background: var(--accent-soft); font-weight: 650; }
  .page-header { display: block; }
  .page-header > .button { margin-top: 14px; }
  .today-stats { gap: 8px 14px; }
  .section-heading { align-items: flex-start; }
  .paper-card { display: block; padding: 18px 16px; }
  .paper-card-actions { width: 100%; margin-top: 16px; flex-direction: row; }
  .paper-card-actions form { flex: 1; }
  .detail-layout { display: block; }
  .detail-main { padding: 22px 17px; }
  .detail-aside { margin-top: 12px; grid-template-columns: 1fr 1fr; }
  .detail-aside .link-panel { grid-column: 1 / -1; }
  .search-row { grid-template-columns: 1fr; }
  .search-row button { width: 100%; }
  .segmented { overflow-x: auto; flex-wrap: nowrap; max-width: 100%; padding-bottom: 2px; }
  .segmented a { white-space: nowrap; }
  .filter-control { width: 100%; }
  .form-grid { grid-template-columns: 1fr; }
  .form-grid .full { grid-column: auto; }
  .checkbox-stack { align-items: flex-start; flex-direction: column; }
  .source-grid, .system-summary { grid-template-columns: 1fr 1fr; }
  .settings-nav { overflow-x: auto; flex-wrap: nowrap; }
  .settings-nav a { white-space: nowrap; }
}

@media (max-width: 430px) {
  .paper-card-actions { display: grid; grid-template-columns: repeat(3, 1fr); }
  .detail-aside { grid-template-columns: 1fr; }
  .detail-aside .link-panel { grid-column: auto; }
  .system-summary, .source-grid { grid-template-columns: 1fr; }
  .section-heading { display: block; }
  .section-heading > a { display: inline-block; margin-top: 8px; }
}

/* v0.2.1 discovery/search foundation */
.discover-header { margin-bottom: 18px; }
.discover-scope {
  display: inline-flex;
  gap: 4px;
  padding: 4px;
  margin-bottom: 18px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface);
}
.discover-scope a {
  padding: 8px 14px;
  border-radius: 7px;
  color: var(--muted);
  font-size: .82rem;
  font-weight: 650;
  text-decoration: none;
}
.discover-scope a.active { background: var(--accent-soft); color: var(--accent-hover); }
.result-summary {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  margin: 15px 1px 10px;
  color: var(--muted);
  font-size: .78rem;
}
.result-summary a { color: var(--accent-hover); text-decoration: none; }
.academic-search-shell { display: grid; gap: 16px; }
.academic-search-panel { margin: 0; }
.academic-provider-row { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 12px; }
.provider-chip {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 6px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: var(--muted);
  font-size: .75rem;
  text-decoration: none;
}
.provider-chip:hover { border-color: var(--border-strong); color: var(--text); }
.provider-chip.active { border-color: #cbd3ff; background: var(--accent-soft); color: var(--accent-hover); }
.search-explainer,
.academic-results-placeholder,
.academic-empty-intro,
.import-panel {
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface);
}
.search-explainer {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 18px;
  padding: 16px 18px;
}
.search-explainer-label { display: block; margin-bottom: 4px; color: var(--subtle); font-size: .68rem; }
.search-explainer strong { font-size: .9rem; }
.search-explainer p { margin: 5px 0 0; color: var(--muted); font-size: .78rem; }
.academic-results-placeholder {
  display: grid;
  grid-template-columns: 50px 1fr;
  gap: 16px;
  padding: 24px;
  background: var(--surface-muted);
}
.placeholder-icon {
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface);
  color: var(--accent);
  font-size: 1.4rem;
}
.academic-results-placeholder h2,
.academic-empty-intro h2,
.import-panel h2 { margin: 0; font-size: 1rem; }
.academic-results-placeholder p,
.academic-empty-intro p,
.import-panel p { margin: 7px 0 14px; color: var(--muted); font-size: .82rem; line-height: 1.65; }
.academic-empty-intro { padding: 24px; }
.import-panel { padding: 22px; }
.import-copy .eyebrow { margin-bottom: 6px; }
.import-form { display: grid; grid-template-columns: 1fr auto; gap: 8px; margin-top: 14px; }
.import-result {
  display: grid;
  gap: 6px;
  margin-top: 13px;
  padding: 12px 14px;
  border-radius: 9px;
  background: var(--surface-soft);
  color: var(--muted);
  font-size: .77rem;
}
.import-result code { color: var(--text); overflow-wrap: anywhere; }
.import-result small { color: var(--subtle); }

@media (max-width: 760px) {
  .discover-scope { width: 100%; display: grid; grid-template-columns: 1fr 1fr; }
  .discover-scope a { text-align: center; }
  .result-summary { align-items: flex-start; flex-direction: column; }
  .academic-provider-row { flex-wrap: nowrap; overflow-x: auto; padding-bottom: 3px; }
  .provider-chip { white-space: nowrap; }
  .academic-results-placeholder { grid-template-columns: 1fr; }
  .import-form { grid-template-columns: 1fr; }
}

/* v0.2.2 readability + local paper actions */
html { font-size: 17px; }

.paper-card,
.paper-action-panel {
  transition: opacity .12s ease, background-color .12s ease;
}
.paper-card.is-updating,
.paper-action-panel.is-updating { opacity: .72; }
.state-badge {
  display: inline-flex;
  align-items: center;
  min-height: 20px;
  padding: 2px 6px;
  border-radius: 6px;
  font-size: .69rem;
  font-weight: 700;
}
.skipped-state { background: var(--danger-soft); color: var(--danger); }
.panel-state-note {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: .74rem;
  line-height: 1.55;
}

@media (max-width: 760px) {
  html { font-size: 17px; }
}


.paper-action-error {
  margin-top: 10px;
  padding: 9px 11px;
  border: 1px solid #fecaca;
  border-radius: 8px;
  background: #fff7f7;
  color: #991b1b;
  font-size: .82rem;
  line-height: 1.45;
}

/* v0.2.2b: action errors must never become a third paper-card column. */
.paper-card { flex-wrap: wrap; }
.paper-card > .paper-action-error {
  flex: 0 0 100%;
  width: 100%;
  margin: -6px 0 0;
  box-sizing: border-box;
}
.paper-action-panel > .paper-action-error { width: 100%; box-sizing: border-box; }

/* v0.2.2d: Today refill + collapsed skipped-today tray */
.skipped-today-section { margin-top: 24px; }
.today-skipped-tray {
  border: 1px solid var(--border);
  border-radius: 10px;
  background: rgba(255,255,255,.62);
  overflow: hidden;
}
.today-skipped-tray > summary {
  display: flex;
  align-items: center;
  gap: 9px;
  min-height: 46px;
  padding: 0 15px;
  cursor: pointer;
  color: var(--muted);
  font-size: .84rem;
  user-select: none;
  list-style: none;
}
.today-skipped-tray > summary::-webkit-details-marker { display: none; }
.today-skipped-tray > summary::before {
  content: "›";
  color: var(--subtle);
  font-size: 1rem;
  transform: rotate(0deg);
  transition: transform .12s ease;
}
.today-skipped-tray[open] > summary::before { transform: rotate(90deg); }
.today-skipped-tray[open] > summary { border-bottom: 1px solid var(--border); }
.skipped-count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 24px;
  height: 22px;
  padding: 0 6px;
  border-radius: 999px;
  background: var(--surface-soft);
  color: var(--text);
  font-weight: 700;
}
.summary-hint { margin-left: auto; color: var(--subtle); font-size: .76rem; }
.skipped-tray-body { padding: 12px; }
.skipped-tray-body .quiet-panel { margin: 0; }
.skipped-paper-list { border-radius: 9px; }

@media (max-width: 760px) {
  .summary-hint { display: none; }
  .today-skipped-tray > summary { min-height: 44px; padding: 0 12px; }
  .skipped-tray-body { padding: 9px; }
}

/* v0.2.3 live academic search */
.external-paper-list {
  display: grid;
  gap: 10px;
}
.external-paper-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 168px;
  gap: 24px;
  padding: 20px 22px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface);
}
.external-paper-main { min-width: 0; }
.external-paper-card h3 { margin: 7px 0 0; font-size: 1.04rem; line-height: 1.45; }
.external-meta-row { display: flex; flex-wrap: wrap; gap: 6px 12px; color: var(--muted); font-size: .75rem; }
.external-abstract {
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 4;
  overflow: hidden;
  margin: 11px 0 0;
  color: #374151;
  font-size: .86rem;
  line-height: 1.68;
}
.external-paper-actions { display: grid; align-content: start; gap: 8px; }
.external-paper-actions form, .external-paper-actions button, .external-paper-actions .button { width: 100%; }
.academic-result-summary { margin-top: 0; }
.import-preview {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  margin-top: 14px;
  padding: 16px;
  border: 1px solid #cbd3ff;
  border-radius: 10px;
  background: var(--accent-soft);
}
.import-preview h3 { margin: 4px 0 0; font-size: .98rem; }
.import-preview p { margin: 5px 0 8px; }
.import-preview form { flex: 0 0 auto; }

@media (max-width: 760px) {
  .external-paper-card { grid-template-columns: 1fr; padding: 18px 16px; }
  .external-paper-actions { grid-template-columns: 1fr 1fr; }
  .external-paper-actions form { grid-column: 1 / -1; }
  .import-preview { align-items: stretch; flex-direction: column; }
  .import-preview form, .import-preview button { width: 100%; }
}

/* v0.2.4 source management */
.source-heading-actions { align-items: flex-start; }
.source-list { display: grid; gap: 10px; }
.source-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 18px;
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface);
}
.source-row.source-disabled { background: var(--surface-muted); opacity: .82; }
.source-row-main { min-width: 0; }
.source-url { margin: 7px 0 0 !important; overflow-wrap: anywhere; font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: .73rem !important; }
.source-status-line { display: flex; flex-wrap: wrap; gap: 7px 14px; margin-top: 9px; color: var(--muted); font-size: .74rem; }
.source-row-actions { display: grid; grid-template-columns: repeat(2, minmax(86px, 1fr)); align-content: start; gap: 7px; }
.source-row-actions form, .source-row-actions button, .source-row-actions .button { width: 100%; }
.source-provider-status { display: flex; align-items: center; flex-wrap: wrap; gap: 9px; margin: 14px 0; font-size: .78rem; }

@media (max-width: 820px) {
  .source-row { grid-template-columns: 1fr; }
  .source-row-actions { grid-template-columns: repeat(2, 1fr); }
  .source-heading-actions { align-items: stretch; flex-direction: column; }
}

/* v0.3 analysis and classic evidence */
.recommendation-reason { margin: 9px 0 0; color: #344054; font-size: .88rem; line-height: 1.65; }
.recommendation-reason strong { color: var(--text); margin-right: 5px; }
.contribution-list { margin: 8px 0 0; padding-left: 1.25rem; color: #344054; line-height: 1.75; }

/* v0.5 discovery/library filters */
.search-filter-grid { align-items: end; gap: 10px; flex-wrap: wrap; }
.compact-filter { display: grid; gap: 5px; min-width: 120px; color: var(--muted); font-size: 0.88rem; }
.compact-filter input, .compact-filter select { min-height: 38px; }
.year-presets { display: flex; align-items: center; gap: 8px; min-height: 38px; }
.year-presets a { color: var(--accent); font-size: 0.9rem; }
.filter-apply { min-height: 38px; }
.library-filter-panel { margin: 14px 0 20px; }
@media (max-width: 720px) { .compact-filter { min-width: calc(50% - 8px); } .year-presets { width: 100%; } }

/* v0.7 AI-optional ranking state */
.ranking-mode-badge {
  display: inline-flex;
  align-items: center;
  min-height: 22px;
  padding: 1px 7px;
  border: 1px solid var(--border-color, #d8dee9);
  border-radius: 999px;
  font-size: 12px;
  line-height: 1.3;
  color: var(--muted-text, #667085);
  background: rgba(148, 163, 184, 0.08);
}
.ranking-mode-badge.enhanced {
  color: var(--accent, #4f46e5);
  border-color: color-mix(in srgb, var(--accent, #4f46e5) 30%, transparent);
  background: color-mix(in srgb, var(--accent, #4f46e5) 7%, transparent);
}

/* v0.8 translation layer */
.original-title { margin: 5px 0 0; color: var(--muted); font-size: .78rem; line-height: 1.45; }
.detail-original-title { margin: 7px 0 0; color: var(--muted); font-size: .88rem; line-height: 1.5; }
.translation-label { display: inline-block; margin-right: 7px; color: var(--accent-hover); font-size: .7rem; font-weight: 700; }
.translation-summary { display: -webkit-box; -webkit-line-clamp: 4; -webkit-box-orient: vertical; overflow: hidden; }
.translation-callout form { margin-top: 12px; }

/* v0.9.0 immersive bilingual reading */
.reading-mode-control {
  display: grid;
  gap: 5px;
  margin: 0 6px 12px;
}
.reading-mode-control label {
  color: var(--subtle);
  font-size: .68rem;
  font-weight: 650;
}
.reading-mode-control select,
.mobile-reading-mode {
  min-height: 34px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: var(--muted);
  font-size: .74rem;
  padding: 5px 8px;
}
.mobile-topbar-actions { display: flex; align-items: center; gap: 8px; }
.mobile-reading-mode { display: none; min-height: 30px; max-width: 72px; padding: 3px 5px; }

.bilingual-title-stack,
.detail-title-stack {
  display: flex;
  flex-direction: column;
}
.paper-title-original { order: 1; }
.paper-title-translated { order: 2; }
.paper-card .paper-title-original { margin: 8px 0 0; line-height: 1.42; font-size: 1.06rem; font-weight: 680; }
.paper-title-original a,
.paper-title-translated a { text-decoration: none; }
.paper-title-original a:hover,
.paper-title-translated a:hover { color: var(--accent-hover); }
.paper-title-translated {
  margin: 5px 0 0;
  color: #344054;
  font-size: .96rem;
  line-height: 1.55;
  font-weight: 620;
}
.translation-label {
  display: inline-flex;
  margin: 0 8px 3px 0;
  color: var(--accent-hover);
  font-size: .68rem;
  font-weight: 750;
  letter-spacing: .02em;
}
.translation-label.ai-label { color: #6b4fd3; }
.paper-reading-block { margin-top: 12px; }
.paper-reading-block .summary { margin-top: 4px; }
.translated-abstract-block { margin-top: 0; }
.paper-abstract-translated,
.paper-abstract-original-inline,
.paper-abstract-original {
  line-height: 1.74;
}
.paper-context-today .paper-abstract-translated {
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 6;
  overflow: hidden;
}
.paper-context-discover .paper-abstract-translated,
.paper-context-library .paper-abstract-translated {
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
  overflow: hidden;
}
.translation-missing { margin: 10px 0 0; font-size: .8rem; }
.inline-original-abstract {
  margin-top: 8px;
  border-left: 2px solid var(--border);
  padding-left: 11px;
  color: var(--muted);
}
.inline-original-abstract summary {
  cursor: pointer;
  color: var(--muted);
  font-size: .76rem;
  font-weight: 650;
}
.inline-original-abstract .summary { font-size: .84rem; color: #475467; }
.paper-abstract-original-inline { display: none; color: #344054; }
.ai-summary-preview {
  margin-top: 10px;
  padding: 9px 11px;
  border-left: 2px solid #d8d0ff;
  background: #fbfaff;
  border-radius: 0 7px 7px 0;
  color: #4b5565;
  font-size: .86rem;
}

.detail-title-original { order: 1; }
.detail-title-translated {
  order: 2;
  margin: 8px 0 0;
  color: #344054;
  font-size: 1.18rem;
  line-height: 1.55;
  font-weight: 620;
}
.detail-section-heading-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 14px;
}
.translation-provider-note { color: var(--subtle); font-size: .72rem; }
.detail-abstract-translation,
.detail-abstract-original {
  margin-top: 15px;
  padding-top: 15px;
  border-top: 1px solid var(--border);
}
.detail-abstract-translation h3,
.detail-abstract-original h3 {
  margin: 0 0 8px;
  color: var(--muted);
  font-size: .82rem;
  letter-spacing: .01em;
}
.detail-abstract-translation p,
.detail-abstract-original p { margin: 0; line-height: 1.82; }
.inline-translation-callout { margin-top: 14px; }
.ai-reading-section { border-left: 3px solid #d8d0ff; }

/* Default: bilingual = English title → Chinese title → Chinese abstract → foldable English abstract. */
html:not([data-reading-mode]),
html[data-reading-mode="bilingual"] { --reading-mode-ready: 1; }

/* Chinese-first: Chinese title becomes primary, English remains nearby for canonical identity. */
html[data-reading-mode="zh"] .paper-title-translated,
html[data-reading-mode="zh"] .detail-title-translated { order: 1; color: var(--text); }
html[data-reading-mode="zh"] .paper-title-original,
html[data-reading-mode="zh"] .detail-title-original { order: 2; color: var(--muted); }
html[data-reading-mode="zh"] .paper-card .paper-title-translated { margin-top: 8px; font-size: 1.08rem; font-weight: 700; }
html[data-reading-mode="zh"] .paper-card .paper-title-original { margin-top: 5px; font-size: .88rem; font-weight: 560; }
html[data-reading-mode="zh"] .detail-title-translated { margin-top: 0; font-size: 1.75rem; font-weight: 700; }
html[data-reading-mode="zh"] .detail-title-original { margin-top: 8px; font-size: 1rem; font-weight: 560; line-height: 1.5; }
html[data-reading-mode="zh"] .detail-abstract-original { display: none; }

/* Original-first: keep translations as secondary context, but read the English abstract inline. */
html[data-reading-mode="original"] .translated-abstract-block,
html[data-reading-mode="original"] .translation-missing,
html[data-reading-mode="original"] .inline-original-abstract { display: none; }
html[data-reading-mode="original"] .paper-abstract-original-inline { display: block; }
html[data-reading-mode="original"] .paper-title-translated { color: var(--subtle); font-size: .82rem; font-weight: 520; }
html[data-reading-mode="original"] .detail-title-translated { color: var(--subtle); font-size: .95rem; font-weight: 520; }
html[data-reading-mode="original"] .detail-abstract-translation { display: none; }
html[data-reading-mode="original"] .detail-abstract-original { margin-top: 8px; padding-top: 0; border-top: 0; }

@media (max-width: 760px) {
  .sidebar-reading-mode { display: none; }
  .mobile-reading-mode { display: inline-block; }
  .paper-context-today .paper-abstract-translated { -webkit-line-clamp: 5; }
  .detail-title-translated { font-size: 1.05rem; }
  .detail-section-heading-row { display: block; }
  .translation-provider-note { display: inline-block; margin-top: 5px; }
}

/* v0.9.1 Today automatic translation */
.translation-placeholder {
  color: var(--subtle);
  font-weight: 500;
}
.translation-pending {
  opacity: .9;
}
.translation-status {
  margin: 4px 0 0;
  font-size: .72rem;
}
.translation-failed .translation-status {
  color: #9a3412;
}
.translation-ready .translation-status {
  color: #39735a;
}
.paper-card.is-translating {
  transition: opacity .16s ease;
}

/* v0.10.5: Today viewport stability.
   Browser scroll anchoring must not pick a bilingual card whose height is being
   changed by translation or replacement. The document keeps its current scroll
   offset while the Today subtree updates. */
#today-paper-area,
#today-paper-area .paper-list {
  overflow-anchor: none;
}

/* v0.10.10: stable but non-clipping content slots for Today cards.
   Use line-clamp + min-height instead of a hard height.  A short placeholder
   still reserves the target number of lines, while real font metrics retain
   enough room for glyph ascenders/descenders and browser rounding. */
.paper-context-today .paper-title-original,
.paper-context-today .paper-title-translated {
  display: -webkit-box;
  -webkit-box-orient: vertical;
  overflow: hidden;
  overflow-wrap: anywhere;
  word-break: break-word;
}

.paper-context-today .paper-title-original {
  -webkit-line-clamp: 2;
  line-clamp: 2;
  min-height: calc(1.42em * 2);
}

.paper-context-today .paper-title-translated {
  -webkit-line-clamp: 2;
  line-clamp: 2;
  min-height: calc(1.55em * 2);
}

.paper-context-today .authors {
  min-height: 1.5em;
  line-height: 1.5;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.paper-context-today .translated-abstract-block {
  position: relative;
  min-height: 7.8rem;
}

.paper-context-today .paper-abstract-translated {
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 4;
  line-clamp: 4;
  min-height: calc(1.74em * 4);
  overflow: hidden;
  overflow-wrap: anywhere;
  word-break: break-word;
}

.paper-context-today .translation-status {
  position: absolute;
  top: 0;
  right: 0;
  max-width: 52%;
  margin: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.paper-context-today .recommendation-reason {
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  overflow: hidden;
  overflow-wrap: anywhere;
}

.paper-context-today .ai-summary-preview {
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
  line-clamp: 3;
  overflow: hidden;
  overflow-wrap: anywhere;
}

/* Academic text can contain long formula-like tokens with few break points. */
.paper-title-original,
.paper-title-translated,
.paper-abstract-translated,
.paper-abstract-original,
.paper-abstract-original-inline,
.detail-abstract-translation p,
.detail-abstract-original p {
  overflow-wrap: anywhere;
  word-break: break-word;
}

.translation-slot-empty {
  visibility: hidden;
}

@media (max-width: 760px) {
  .paper-context-today .paper-title-original {
    -webkit-line-clamp: 3;
    line-clamp: 3;
    min-height: calc(1.42em * 3);
  }

  .paper-context-today .paper-title-translated {
    -webkit-line-clamp: 2;
    line-clamp: 2;
    min-height: calc(1.55em * 2);
  }

  .paper-context-today .translated-abstract-block {
    min-height: 9.3rem;
  }

  .paper-context-today .paper-abstract-translated {
    -webkit-line-clamp: 5;
    line-clamp: 5;
    min-height: calc(1.74em * 5);
  }
}

/* v0.10.5 dismissal motion is compositor-only. Do not animate height/padding:
   collapsing geometry before reserve insertion caused a full-list shrink/grow. */
.paper-card.is-dismissing {
  opacity: 0;
  transform: translateX(-10px);
  pointer-events: none;
  transition:
    opacity .12s ease,
    transform .16s cubic-bezier(.2,.7,.2,1);
}

@media (prefers-reduced-motion: reduce) {
  .paper-card.is-dismissing {
    transition: none !important;
    transform: none !important;
  }
}

/* v0.10 production access */
.login-shell { min-height: 100vh; display: grid; place-items: center; padding: 24px; background: var(--page-bg, #f7f8fb); }
.login-card { width: min(440px, 100%); background: #fff; border: 1px solid #dde2ea; border-radius: 16px; padding: 30px; }
.login-brand { display: inline-flex; margin-bottom: 24px; }
.login-card h1 { margin: 0 0 10px; font-size: 26px; }
.login-button { display: inline-flex; margin-top: 18px; text-decoration: none; }
.session-card { display: flex; align-items: center; justify-content: space-between; gap: 8px; padding: 9px 10px; margin-bottom: 8px; border: 1px solid #dde2ea; border-radius: 10px; }
.session-user { min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 13px; color: #53627a; }
.session-logout { padding: 5px 8px; font-size: 12px; }


/* v0.10.7 audit toolbar. Keep this in the external stylesheet: the application
   CSP intentionally uses style-src 'self' and blocks JS-created inline styles. */
.scroll-audit-toolbar {
  position: fixed;
  right: 12px;
  bottom: 12px;
  z-index: 2147483647;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  border: 1px solid #b8c2d1;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 5px 18px rgba(22, 34, 51, 0.14);
  font: 12px/1.2 -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
  color: #263247;
}

.scroll-audit-toolbar-button {
  padding: 5px 8px;
  border: 1px solid #cbd3df;
  border-radius: 7px;
  background: #fff;
  color: #263247;
  cursor: pointer;
}


/* v0.10.12: compact Today title slots + one primary reading excerpt.
   English title = 2 lines, Chinese title = 1 line.  With AI-summary-first
   enabled, cards that have an AI summary show it instead of the translated
   abstract; cards without AI analysis naturally fall back to the abstract. */
.today-summary-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 2px;
  padding: 7px 10px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
  color: var(--muted);
  font-size: .78rem;
  font-weight: 650;
  white-space: nowrap;
  cursor: pointer;
  user-select: none;
}
.today-summary-toggle input { margin: 0; accent-color: var(--accent); }

.paper-context-today .paper-title-original {
  -webkit-line-clamp: 2;
  line-clamp: 2;
  min-height: calc(1.42em * 2);
}
.paper-context-today .paper-title-translated {
  -webkit-line-clamp: 1;
  line-clamp: 1;
  min-height: 1.55em;
}

.paper-context-today .ai-summary-preview {
  margin-top: 12px;
  min-height: 7.8rem;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  color: inherit;
  font-size: inherit;
}
.paper-context-today .paper-ai-summary {
  display: -webkit-box;
  margin-top: 4px;
  line-height: 1.74;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 4;
  line-clamp: 4;
  min-height: calc(1.74em * 4);
  overflow: hidden;
  overflow-wrap: anywhere;
  word-break: break-word;
}

/* Default preference is ON.  Keep translation nodes in the DOM so automatic
   translation can still complete/cache while the AI summary is visible. */
html[data-ai-summary-first="1"] .paper-context-today.has-ai-summary .paper-reading-block {
  display: none;
}
html[data-ai-summary-first="0"] .paper-context-today .ai-summary-preview {
  display: none;
}

/* "Original first" remains authoritative: it should never be replaced by AI. */
html[data-reading-mode="original"] .paper-context-today.has-ai-summary .paper-reading-block {
  display: block;
}
html[data-reading-mode="original"] .paper-context-today .ai-summary-preview {
  display: none;
}

@media (max-width: 760px) {
  .today-header { align-items: flex-start; }
  .today-summary-toggle { padding: 6px 9px; font-size: .74rem; }
  .paper-context-today .paper-title-original {
    -webkit-line-clamp: 2;
    line-clamp: 2;
    min-height: calc(1.42em * 2);
  }
  .paper-context-today .paper-title-translated {
    -webkit-line-clamp: 1;
    line-clamp: 1;
    min-height: 1.55em;
  }
  .paper-context-today .ai-summary-preview { min-height: 9.3rem; }
  .paper-context-today .paper-ai-summary {
    -webkit-line-clamp: 5;
    line-clamp: 5;
    min-height: calc(1.74em * 5);
  }
}