:root {
  color-scheme: light;
  --paper: #fbfaf6;
  --surface: #fffefa;
  --ink: #22211d;
  --muted: #706f68;
  --line: #dfd9cc;
  --accent: #3f6f62;
  --accent-strong: #2c5048;
  --gold: #9f6b2f;
  --blue: #496f93;
  --rose: #9a5963;
  --shadow: 0 1px 2px rgba(43, 39, 31, 0.05), 0 10px 24px rgba(43, 39, 31, 0.06);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  background: var(--paper);
}

body {
  min-height: 100%;
  margin: 0;
  color: var(--ink);
  background:
    repeating-linear-gradient(
      0deg,
      rgba(90, 83, 64, 0.025) 0,
      rgba(90, 83, 64, 0.025) 1px,
      transparent 1px,
      transparent 32px
    ),
    var(--paper);
}

body.detail-open {
  overflow: hidden;
}

button,
input,
select {
  font: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

.app-shell {
  width: min(100%, 780px);
  min-height: 100vh;
  margin: 0 auto;
  padding: max(18px, env(safe-area-inset-top)) 16px 28px;
}

.top-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 6px 2px 18px;
}

.brand-lockup {
  display: flex;
  align-items: center;
  gap: 11px;
}

.brand-mark {
  display: grid;
  width: 43px;
  height: 43px;
  flex: 0 0 43px;
  place-items: center;
  border: 1px solid #264a43;
  border-radius: 8px;
  color: #fffefa;
  background: var(--accent-strong);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.45rem;
  line-height: 1;
}

.kicker {
  margin: 0 0 3px;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 680;
  text-transform: uppercase;
  letter-spacing: 0;
}

h1,
h2,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1.9rem, 9vw, 3rem);
  font-weight: 650;
  line-height: 1;
  letter-spacing: 0;
}

.icon-button {
  display: grid;
  width: 46px;
  height: 46px;
  flex: 0 0 46px;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--accent-strong);
  background: var(--surface);
  box-shadow: none;
  cursor: pointer;
}

svg {
  width: 20px;
  height: 20px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2;
}

.control-panel {
  display: grid;
  gap: 12px;
  padding-bottom: 14px;
}

.source-tabs {
  display: flex;
  gap: 6px;
  padding: 2px 0 4px;
  overflow-x: auto;
  scrollbar-width: none;
}

.source-tabs::-webkit-scrollbar {
  display: none;
}

.quick-filters {
  display: flex;
  gap: 7px;
  overflow-x: auto;
  padding: 0 0 4px;
  scrollbar-width: none;
}

.quick-filters::-webkit-scrollbar {
  display: none;
}

.tab {
  flex: 0 0 auto;
  min-height: 42px;
  padding: 0 15px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  background: rgba(255, 254, 250, 0.74);
  font-size: 0.9rem;
  font-weight: 680;
  cursor: pointer;
}

.filter-chip {
  flex: 0 0 auto;
  min-height: 34px;
  padding: 0 11px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  background: rgba(255, 254, 250, 0.74);
  font-size: 0.84rem;
  font-weight: 700;
  cursor: pointer;
}

.filter-chip.active {
  color: var(--accent-strong);
  border-color: rgba(63, 111, 98, 0.45);
  background: rgba(63, 111, 98, 0.1);
}

.tab.active {
  color: #fff;
  background: var(--accent);
}

.search-box {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 52px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.search-box svg {
  flex: 0 0 20px;
  color: var(--accent);
}

.search-label {
  flex: 0 0 auto;
  color: var(--muted);
  font-size: 0.76rem;
  font-weight: 760;
  text-transform: uppercase;
  letter-spacing: 0;
}

.search-box input {
  width: 100%;
  min-width: 0;
  border: 0;
  outline: 0;
  color: var(--ink);
  background: transparent;
  font-size: 1rem;
}

.filter-row {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(96px, 0.55fr) minmax(96px, 0.55fr);
  gap: 10px;
}

.filter-row label {
  display: grid;
  gap: 5px;
}

.filter-row span {
  color: var(--muted);
  font-size: 0.76rem;
  font-weight: 700;
}

select {
  width: 100%;
  min-height: 44px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--ink);
  background: var(--surface);
}

.feed-status {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin: 6px 0 14px;
  padding: 12px 0;
  border-top: 1px solid rgba(32, 33, 36, 0.08);
  border-bottom: 1px solid rgba(32, 33, 36, 0.08);
}

.status-actions {
  display: flex;
  flex: 0 0 auto;
  gap: 8px;
}

#statusLabel {
  display: block;
  font-weight: 760;
}

#statusDetail {
  margin: 2px 0 0;
  color: var(--muted);
  font-size: 0.88rem;
}

.text-button,
.open-link,
.save-button,
.hide-button,
.share-button,
.details-button,
.load-more-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  min-height: 38px;
  padding: 0 13px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--accent-strong);
  background: var(--surface);
  font-size: 0.9rem;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
}

.icon-button.small {
  width: 38px;
  height: 38px;
  flex-basis: 38px;
}

.text-button.subtle {
  color: var(--muted);
  background: transparent;
}

.source-counts {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: -2px 0 14px;
}

.count-pill {
  display: inline-flex;
  align-items: center;
  min-height: 26px;
  padding: 0 9px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  background: rgba(255, 254, 250, 0.75);
  font-size: 0.78rem;
  font-weight: 700;
}

.reset-hidden-button {
  color: var(--accent-strong);
  cursor: pointer;
}

.paper-feed,
.saved-list {
  display: grid;
  gap: 12px;
}

.paper-card,
.saved-panel {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.paper-card {
  display: grid;
  gap: 10px;
  padding: 16px 17px 17px;
  border-left: 4px solid rgba(63, 111, 98, 0.72);
}

.paper-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  color: var(--muted);
  font-size: 0.78rem;
}

.source-pill {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  padding: 0 8px;
  border-radius: 6px;
  color: #fff;
  background: var(--accent);
  font-size: 0.74rem;
  font-weight: 720;
}

.source-pill.biorxiv {
  background: var(--gold);
}

.source-pill.medrxiv {
  background: var(--rose);
}

.source-pill.pubmed {
  background: var(--blue);
}

.paper-card h2 {
  margin-bottom: 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.18rem;
  font-weight: 650;
  line-height: 1.26;
  letter-spacing: 0;
}

.authors {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.4;
}

.journal {
  margin-bottom: 0;
  color: var(--accent-strong);
  font-size: 0.86rem;
  font-weight: 700;
  line-height: 1.35;
}

.paper-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.paper-badge {
  display: inline-flex;
  align-items: center;
  min-height: 23px;
  padding: 0 8px;
  border: 1px solid rgba(63, 111, 98, 0.25);
  border-radius: 999px;
  color: var(--accent-strong);
  background: rgba(63, 111, 98, 0.08);
  font-size: 0.74rem;
  font-weight: 720;
}

.abstract {
  margin-bottom: 0;
  color: #3f3c35;
  font-size: 0.94rem;
  line-height: 1.58;
}

.paper-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  padding-top: 2px;
}

.paper-actions a,
.paper-actions button {
  flex: 1 1 118px;
}

.save-button.saved {
  color: #fff;
  border-color: var(--accent-strong);
  background: var(--accent-strong);
}

.saved-panel {
  margin-bottom: 14px;
  padding: 14px;
}

.panel-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}

.panel-heading h2 {
  margin-bottom: 0;
  font-size: 1rem;
}

.saved-item {
  display: grid;
  gap: 4px;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.saved-item a {
  color: var(--ink);
  font-weight: 740;
  text-decoration: none;
}

.saved-item span {
  color: var(--muted);
  font-size: 0.82rem;
}

.empty-state {
  padding: 26px 18px;
  border: 1px dashed var(--line);
  border-radius: 8px;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.58);
  text-align: center;
}

.load-more-button {
  width: 100%;
  min-height: 48px;
  margin-top: 14px;
  color: #fffefa;
  border-color: var(--accent-strong);
  background: var(--accent-strong);
}

.load-more-button:disabled {
  color: var(--muted);
  border-color: var(--line);
  background: rgba(255, 254, 250, 0.78);
  cursor: default;
}

.detail-panel {
  position: fixed;
  inset: 0;
  z-index: 10;
  display: grid;
  align-items: end;
  padding: 18px;
}

.onboarding-panel {
  position: fixed;
  inset: 0;
  z-index: 12;
  display: grid;
  place-items: center;
  padding: 18px;
}

.detail-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(34, 33, 29, 0.34);
}

.onboarding-sheet {
  position: relative;
  width: min(100%, 560px);
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: 0 24px 60px rgba(28, 25, 20, 0.2);
}

.onboarding-sheet h2,
.onboarding-sheet h3 {
  margin-bottom: 0;
  font-family: Georgia, "Times New Roman", serif;
  letter-spacing: 0;
}

.onboarding-sheet h2 {
  font-size: 1.55rem;
  font-weight: 650;
}

.onboarding-sheet h3 {
  font-size: 1.05rem;
  font-weight: 650;
}

.onboarding-group {
  display: grid;
  gap: 10px;
  margin: 18px 0;
}

.choice-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 9px;
}

.choice-grid.compact {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.choice-card {
  min-height: 46px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--ink);
  background: rgba(255, 254, 250, 0.74);
  font-weight: 700;
  cursor: pointer;
}

.choice-card.active {
  color: #fffefa;
  border-color: var(--accent-strong);
  background: var(--accent);
}

.detail-sheet {
  position: relative;
  width: min(100%, 720px);
  max-height: min(82vh, 760px);
  margin: 0 auto;
  padding: 18px;
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: 0 24px 60px rgba(28, 25, 20, 0.2);
}

.detail-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}

.detail-sheet h2 {
  margin-bottom: 10px;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1.35rem, 6vw, 2rem);
  font-weight: 650;
  line-height: 1.18;
  letter-spacing: 0;
}

.abstract.full {
  margin: 14px 0;
  font-size: 0.98rem;
}

.hidden {
  display: none;
}

@media (max-width: 430px) {
  .app-shell {
    padding-right: 12px;
    padding-left: 12px;
  }

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

  .paper-card {
    padding: 14px;
  }

  .paper-actions {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 7px;
  }

  .paper-actions a,
  .paper-actions button {
    min-height: 36px;
    padding: 0 6px;
    font-size: 0.8rem;
  }

  .paper-actions svg {
    width: 16px;
    height: 16px;
  }

  .detail-panel,
  .onboarding-panel {
    padding: 0;
  }

  .detail-sheet,
  .onboarding-sheet {
    max-height: 86vh;
    overflow: auto;
    border-right: 0;
    border-bottom: 0;
    border-left: 0;
    border-radius: 8px 8px 0 0;
  }

  .onboarding-panel {
    align-items: end;
    place-items: end stretch;
  }

  .choice-grid,
  .choice-grid.compact {
    grid-template-columns: 1fr;
  }
}