:root {
  color-scheme: light;
  --ink: #17201d;
  --ink-soft: #52605b;
  --ink-faint: #7c8883;
  --paper: #f7f5ef;
  --paper-deep: #eeeae0;
  --surface: #fffef9;
  --surface-muted: #f0eee7;
  --line: #d8d4ca;
  --line-strong: #aaa69c;
  --accent: #bd4c32;
  --accent-dark: #86321f;
  --accent-soft: #f4ded5;
  --green: #24624e;
  --green-soft: #dcebe5;
  --blue: #355e7c;
  --blue-soft: #dfeaf1;
  --yellow: #f1d778;
  --shadow: 0 18px 55px rgb(37 42 38 / 10%);
  --font-sans: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-serif: "Source Han Serif SC", "Noto Serif CJK SC", "Songti SC", STSong, Georgia, serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 32px;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  line-height: 1.7;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image: radial-gradient(rgb(23 32 29 / 4.5%) 0.7px, transparent 0.7px);
  background-size: 7px 7px;
  content: "";
  pointer-events: none;
}

a {
  color: inherit;
}

button,
input,
textarea {
  color: inherit;
  font: inherit;
}

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

:focus-visible {
  outline: 3px solid rgb(189 76 50 / 30%);
  outline-offset: 3px;
}

[hidden] {
  display: none !important;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--accent);
  font-size: 0.68rem;
  font-weight: 750;
  letter-spacing: 0.17em;
  line-height: 1.35;
}

.quiet-link {
  color: var(--ink-soft);
  font-size: 0.84rem;
  text-decoration-color: var(--line-strong);
  text-underline-offset: 5px;
}

.quiet-link:hover {
  color: var(--accent-dark);
}

/* Library home */

.library-page {
  min-height: 100vh;
}

.library-header,
.library-footer,
.library-intro,
.paper-library {
  width: min(1180px, calc(100% - 48px));
  margin-inline: auto;
}

.library-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: 26px;
  border-bottom: 1px solid var(--line);
}

.library-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.library-brand__mark {
  display: grid;
  width: 40px;
  height: 40px;
  place-items: center;
  border: 1px solid var(--ink);
  border-radius: 50%;
  font-family: var(--font-serif);
  font-size: 1.06rem;
}

.library-brand strong,
.library-brand small {
  display: block;
}

.library-brand strong {
  font-family: var(--font-serif);
  font-size: 0.96rem;
  letter-spacing: 0.01em;
}

.library-brand small {
  margin-top: 1px;
  color: var(--ink-faint);
  font-size: 0.67rem;
  letter-spacing: 0.09em;
}

.library-intro {
  min-height: 500px;
  padding: 104px 0 82px;
}

.library-intro h1 {
  max-width: 820px;
  margin: 0;
  font-family: var(--font-serif);
  font-size: clamp(3rem, 7vw, 6.35rem);
  font-weight: 560;
  letter-spacing: -0.055em;
  line-height: 1.04;
}

.library-intro__copy {
  max-width: 665px;
  margin: 38px 0 0;
  color: var(--ink-soft);
  font-size: clamp(1rem, 1.8vw, 1.16rem);
}

.library-principles {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-top: 30px;
}

.library-principles span,
.paper-tag {
  padding: 6px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgb(255 254 249 / 55%);
  color: var(--ink-soft);
  font-size: 0.72rem;
}

.paper-library {
  padding: 44px 0 92px;
  border-top: 1px solid var(--line);
}

.paper-library__header {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 34px;
}

.paper-library__header h2 {
  margin: 0;
  font-family: var(--font-serif);
  font-size: clamp(2rem, 4vw, 3.2rem);
  font-weight: 570;
  letter-spacing: -0.035em;
}

.paper-library__header h2 span {
  display: inline-grid;
  min-width: 36px;
  height: 36px;
  margin-left: 6px;
  place-items: center;
  border-radius: 50%;
  background: var(--accent);
  color: white;
  font-family: var(--font-sans);
  font-size: 0.8rem;
  vertical-align: 0.25em;
}

.paper-search {
  display: flex;
  width: min(360px, 100%);
  align-items: center;
  gap: 9px;
  padding: 9px 4px 9px 0;
  border-bottom: 1px solid var(--line-strong);
  color: var(--ink-faint);
}

.paper-search:focus-within {
  border-color: var(--accent);
  color: var(--accent);
}

.paper-search input {
  width: 100%;
  padding: 0;
  border: 0;
  outline: 0;
  background: transparent;
  font-size: 0.9rem;
}

.paper-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--ink);
}

.paper-card {
  min-width: 0;
  border-bottom: 1px solid var(--line);
}

.paper-card:nth-child(odd) {
  border-right: 1px solid var(--line);
}

.paper-card__link {
  display: flex;
  min-height: 360px;
  flex-direction: column;
  padding: 28px;
  text-decoration: none;
  transition: background 160ms ease;
}

.paper-card__link:hover {
  background: var(--surface);
}

.paper-card__meta,
.paper-card__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.paper-card__index,
.paper-card__date,
.paper-card__authors,
.paper-card__arrow {
  color: var(--ink-faint);
  font-size: 0.72rem;
}

.paper-card__title {
  max-width: 520px;
  margin: 45px 0 14px;
  font-family: var(--font-serif);
  font-size: clamp(1.55rem, 3vw, 2.15rem);
  font-weight: 600;
  letter-spacing: -0.025em;
  line-height: 1.28;
}

.paper-card__description {
  display: -webkit-box;
  margin: 0;
  overflow: hidden;
  color: var(--ink-soft);
  font-size: 0.91rem;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
}

.paper-card__authors {
  margin: 16px 0 26px;
}

.paper-card__footer {
  margin-top: auto;
}

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

.paper-card__arrow {
  flex: none;
  color: var(--accent-dark);
  font-weight: 700;
}

.paper-empty,
.paper-no-result,
.paper-error {
  min-height: 230px;
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--line);
}

.paper-empty {
  display: grid;
  grid-template-columns: minmax(80px, 0.25fr) minmax(0, 1fr);
  align-items: center;
  gap: 30px;
  padding: 42px 0;
}

.paper-empty__index {
  color: var(--line-strong);
  font-family: var(--font-serif);
  font-size: clamp(3.5rem, 8vw, 7rem);
}

.paper-empty h3,
.paper-no-result h3 {
  margin: 0 0 8px;
  font-family: var(--font-serif);
  font-size: 1.5rem;
}

.paper-empty p,
.paper-no-result p,
.paper-error {
  margin-block: 0;
  color: var(--ink-soft);
}

.paper-no-result {
  grid-column: 1 / -1;
  padding: 62px 0;
  text-align: center;
}

.paper-error {
  padding: 72px 0;
  color: var(--accent-dark);
  text-align: center;
}

.library-footer {
  display: flex;
  justify-content: space-between;
  padding: 24px 0 34px;
  border-top: 1px solid var(--line);
  color: var(--ink-faint);
  font-size: 0.72rem;
}

/* Paper document */

.paper-page {
  background: var(--surface);
}

.paper-page::before {
  opacity: 0.45;
}

.paper-topbar {
  display: flex;
  width: min(1440px, calc(100% - 44px));
  min-height: 64px;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-inline: auto;
  border-bottom: 1px solid var(--line);
}

.paper-topbar__back {
  color: var(--ink-soft);
  font-size: 0.78rem;
  text-decoration: none;
}

.paper-topbar__back:hover {
  color: var(--accent);
}

.paper-topbar__meta {
  color: var(--ink-faint);
  font-size: 0.7rem;
  letter-spacing: 0.04em;
}

.paper-doc {
  display: grid;
  width: min(1440px, calc(100% - 44px));
  grid-template-columns: 210px minmax(0, 760px) 250px;
  justify-content: center;
  gap: 52px;
  margin-inline: auto;
  padding: 62px 0 100px;
}

.paper-sidebar,
.paper-rail {
  align-self: start;
}

.paper-sidebar {
  position: sticky;
  top: 28px;
  max-height: calc(100vh - 56px);
  overflow: auto;
  scrollbar-width: thin;
}

.paper-sidebar__label,
.paper-rail__label {
  margin: 0 0 16px;
  color: var(--ink-faint);
  font-size: 0.64rem;
  font-weight: 750;
  letter-spacing: 0.16em;
}

.paper-map {
  display: grid;
  gap: 3px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.paper-map a {
  display: block;
  padding: 7px 10px;
  border-left: 2px solid transparent;
  color: var(--ink-soft);
  font-size: 0.78rem;
  line-height: 1.45;
  text-decoration: none;
}

.paper-map a:hover,
.paper-map a[aria-current="true"] {
  border-left-color: var(--accent);
  background: var(--accent-soft);
  color: var(--accent-dark);
}

.paper-main {
  min-width: 0;
}

.paper-main > section {
  padding: 70px 0 10px;
  border-top: 1px solid var(--line);
}

.paper-main > section:first-child {
  padding-top: 0;
  border-top: 0;
}

.paper-kicker {
  margin: 0 0 18px;
  color: var(--accent);
  font-size: 0.69rem;
  font-weight: 750;
  letter-spacing: 0.14em;
}

.paper-title {
  margin: 0;
  font-family: var(--font-serif);
  font-size: clamp(2.7rem, 5.2vw, 4.75rem);
  font-weight: 580;
  letter-spacing: -0.05em;
  line-height: 1.08;
}

.paper-subtitle {
  max-width: 650px;
  margin: 24px 0 0;
  color: var(--ink-soft);
  font-size: 1.02rem;
}

.paper-byline {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin: 24px 0 46px;
  color: var(--ink-faint);
  font-size: 0.74rem;
}

.research-purpose {
  margin: 42px 0;
  padding: 28px 30px;
  border-left: 4px solid var(--accent);
  background: var(--accent-soft);
}

.research-purpose__label {
  display: block;
  margin-bottom: 8px;
  color: var(--accent-dark);
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.13em;
}

.research-purpose p {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 1.18rem;
  line-height: 1.85;
}

.paper-main h2 {
  margin: 0 0 26px;
  font-family: var(--font-serif);
  font-size: clamp(1.85rem, 3.6vw, 2.55rem);
  font-weight: 610;
  letter-spacing: -0.03em;
  line-height: 1.25;
}

.paper-main h3 {
  margin: 38px 0 12px;
  font-family: var(--font-serif);
  font-size: 1.32rem;
  font-weight: 650;
}

.paper-main p,
.paper-main li {
  font-family: var(--font-serif);
  font-size: 1.01rem;
  line-height: 1.92;
}

.paper-main p {
  margin: 0 0 20px;
}

.paper-main ul,
.paper-main ol {
  padding-left: 1.35em;
}

.paper-main a {
  color: var(--accent-dark);
  text-decoration-color: rgb(134 50 31 / 35%);
  text-underline-offset: 4px;
}

.table-wrap {
  margin: 30px 0;
  overflow-x: auto;
  border: 1px solid var(--line);
  background: var(--surface);
  scrollbar-width: thin;
}

.table-wrap:focus-visible {
  outline-offset: 4px;
}

.evidence-table {
  width: 100%;
  min-width: 680px;
  border-collapse: collapse;
  font-variant-numeric: tabular-nums;
}

.evidence-table th,
.evidence-table td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--line);
  font-size: 0.78rem;
  line-height: 1.55;
  text-align: left;
  vertical-align: top;
}

.evidence-table th {
  background: var(--surface-muted);
  color: var(--ink-soft);
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.evidence-table td:not(:first-child) {
  white-space: nowrap;
}

.evidence-table tbody tr:last-child td {
  border-bottom: 0;
}

.evidence-table__emphasis td {
  background: var(--green-soft);
  color: #21483b;
  font-weight: 750;
}

.evidence-table--compact {
  min-width: 820px;
}

.evidence-note {
  margin: 22px 0 30px !important;
  padding: 15px 18px;
  border-left: 3px solid var(--line-strong);
  background: var(--surface-muted);
  color: var(--ink-soft);
  font-family: var(--font-sans) !important;
  font-size: 0.82rem !important;
  line-height: 1.7 !important;
}

.claim-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin: 30px 0 42px;
}

.claim-card {
  padding: 20px;
  border: 1px solid var(--line);
  background: var(--surface);
}

.claim-card > span {
  display: inline-block;
  margin-bottom: 14px;
  color: var(--ink-soft);
  font-size: 0.64rem;
  font-weight: 800;
  letter-spacing: 0.09em;
}

.claim-card h3 {
  margin: 0 0 10px;
  font-size: 1.02rem;
  line-height: 1.45;
}

.claim-card p {
  margin: 0;
  color: var(--ink-soft);
  font-family: var(--font-sans);
  font-size: 0.78rem;
  line-height: 1.7;
}

.claim-card--supported {
  border-top: 3px solid var(--green);
}

.claim-card--bounded {
  border-top: 3px solid var(--accent);
}

.claim-card--open {
  border-top: 3px solid var(--blue);
}

.source-list {
  margin: 0;
  padding-left: 1.35em;
}

.core-conclusion,
.term-bridge,
.paper-annotation {
  margin: 28px 0;
  padding: 24px 26px;
  border: 1px solid var(--line);
  background: var(--surface-muted);
}

.core-conclusion {
  border-top: 3px solid var(--ink);
}

.core-conclusion__label,
.term-bridge__label {
  display: block;
  margin-bottom: 9px;
  color: var(--ink-soft);
  font-family: var(--font-sans);
  font-size: 0.67rem;
  font-weight: 800;
  letter-spacing: 0.14em;
}

.term-bridge {
  border-color: #c6d7df;
  background: var(--blue-soft);
}

.term-bridge p:last-child,
.core-conclusion p:last-child {
  margin-bottom: 0;
}

.svg-figure {
  margin: 34px 0;
  overflow: hidden;
  border: 1px solid var(--line);
  background: #fbfaf6;
}

.svg-figure svg {
  display: block;
  width: 100%;
  height: auto;
}

.concept-visual {
  max-width: 640px;
}

.read-guide {
  margin: 0;
  padding: 16px 20px;
  border-top: 1px solid var(--line);
  background: var(--surface-muted);
  color: var(--ink-soft);
  font-family: var(--font-sans) !important;
  font-size: 0.8rem !important;
  line-height: 1.65 !important;
}

.read-guide strong {
  color: var(--ink);
}

.formula-card {
  margin: 34px 0;
  padding: 28px;
  border: 1px solid var(--ink);
  background: #fbfaf6;
}

.formula-card__label {
  color: var(--accent);
  font-family: var(--font-sans);
  font-size: 0.67rem;
  font-weight: 800;
  letter-spacing: 0.14em;
}

.formula-card__equation {
  margin: 24px 0 16px;
  overflow-x: auto;
  font-family: "Iowan Old Style", "Times New Roman", serif;
  font-size: clamp(1.65rem, 4vw, 2.55rem);
  text-align: center;
  white-space: nowrap;
}

.formula-symbol {
  color: var(--accent-dark);
  font-style: italic;
}

.formula-card__caption {
  color: var(--ink-soft);
  font-family: var(--font-sans) !important;
  font-size: 0.82rem !important;
  text-align: center;
}

.formula-legend {
  margin: 24px 0 0;
  border-top: 1px solid var(--line);
}

.formula-legend__row {
  display: grid;
  grid-template-columns: 78px minmax(0, 1fr);
  gap: 16px;
  padding: 13px 0;
  border-bottom: 1px solid var(--line);
}

.formula-legend dt {
  color: var(--accent-dark);
  font-family: "Iowan Old Style", "Times New Roman", serif;
  font-size: 1.12rem;
  font-style: italic;
  font-weight: 700;
}

.formula-legend dd {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.86rem;
}

.formula-card__intuition {
  margin-top: 22px;
  padding: 16px 18px;
  background: var(--accent-soft);
  font-family: var(--font-serif);
  font-size: 0.92rem;
  line-height: 1.75;
}

.annotation-highlight,
.comment-highlight {
  position: relative;
  padding: 0 0.08em;
  box-decoration-break: clone;
  -webkit-box-decoration-break: clone;
}

.annotation-highlight {
  background: linear-gradient(transparent 55%, rgb(241 215 120 / 80%) 55%);
}

.comment-highlight {
  background: linear-gradient(transparent 55%, rgb(164 202 190 / 70%) 55%);
}

.svg-text-annotation-highlight {
  paint-order: stroke fill;
  stroke: rgb(241 215 120 / 92%);
  stroke-linejoin: round;
  stroke-width: 8px;
}

.svg-inline-highlight {
  text-decoration: underline dashed var(--accent) 2px;
  text-underline-offset: 5px;
}

.paper-question-marker {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin: -7px 0 24px;
  padding: 9px 12px;
  border-left: 2px solid #b79218;
  background: #fbf3cf;
  color: #5c4b12;
  font-family: var(--font-sans);
  font-size: 0.75rem;
}

.paper-question-marker__action {
  flex: none;
  font-weight: 800;
}

.paper-question-marker__supplement {
  color: #74611c;
}

.paper-answer-note {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.paper-comment {
  margin: 16px 0 28px;
  padding: 18px 20px;
  border: 1px solid #b9d0c8;
  border-left: 3px solid var(--green);
  background: var(--green-soft);
  font-family: var(--font-sans);
}

.paper-comment__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 8px;
  color: var(--green);
  font-size: 0.75rem;
}

.paper-comment__meta {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink-faint);
  font-size: 0.68rem;
}

.paper-comment__anchor {
  color: var(--green);
  text-underline-offset: 3px;
}

.paper-comment__body {
  margin: 0 !important;
  color: #21483b;
  font-family: var(--font-serif) !important;
  font-size: 0.9rem !important;
  line-height: 1.75 !important;
}

.paper-comment--local {
  border-style: dashed;
}

.paper-comment__local-badge {
  padding: 2px 7px;
  border: 1px solid #88ad9f;
  border-radius: 999px;
  color: var(--green);
  font-size: 0.62rem;
  font-weight: 750;
}

.paper-rail {
  position: sticky;
  top: 28px;
  display: grid;
  max-height: calc(100vh - 56px);
  gap: 14px;
  overflow: auto;
  scrollbar-width: thin;
}

.paper-mark-panel,
.paper-comment-panel {
  padding: 18px;
  border: 1px solid var(--line);
  background: var(--surface-muted);
}

.paper-mark-panel h2,
.paper-comment-panel h2 {
  margin: 0 0 8px;
  font-family: var(--font-serif);
  font-size: 1rem;
  line-height: 1.35;
}

.paper-mark-panel p,
.paper-comment-panel > p {
  margin: 0 0 12px;
  color: var(--ink-soft);
  font-size: 0.72rem;
  line-height: 1.55;
}

.bridge-status {
  position: relative;
  padding-left: 15px;
}

.bridge-status::before {
  position: absolute;
  top: 0.55em;
  left: 0;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--line-strong);
  content: "";
}

.bridge-status[data-state="online"]::before {
  background: #2d8b67;
  box-shadow: 0 0 0 3px rgb(45 139 103 / 12%);
}

.button,
.paper-comment-new {
  display: inline-flex;
  min-height: 38px;
  align-items: center;
  justify-content: center;
  padding: 8px 14px;
  border: 1px solid var(--line-strong);
  border-radius: 2px;
  background: transparent;
  cursor: pointer;
  font-size: 0.76rem;
  font-weight: 700;
}

.paper-comment-new {
  width: 100%;
  border-color: var(--green);
  color: var(--green);
}

.button:hover,
.paper-comment-new:hover {
  background: rgb(255 255 255 / 60%);
}

.button--primary {
  border-color: var(--accent);
  background: var(--accent);
  color: white;
}

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

.paper-askbar {
  position: fixed;
  z-index: 80;
  width: min(650px, calc(100vw - 24px));
  border: 1px solid #323b37;
  border-radius: 5px;
  background: #202824;
  box-shadow: 0 14px 40px rgb(14 20 17 / 28%);
  color: #f7f5ef;
}

.paper-askbar__actions {
  display: flex;
  align-items: center;
  gap: 3px;
  padding: 6px;
}

.paper-askbar__label {
  padding-inline: 7px;
  color: #aeb8b3;
  font-size: 0.65rem;
}

.paper-askbar__button,
.paper-askbar__cancel,
.paper-askbar__submit,
.icon-button {
  border: 0;
  background: transparent;
  cursor: pointer;
}

.paper-askbar__button {
  padding: 7px 9px;
  border-radius: 3px;
  color: #f7f5ef;
  font-size: 0.71rem;
  white-space: nowrap;
}

.paper-askbar__button:hover {
  background: #35403a;
}

.paper-askbar__button--comment {
  color: #a9d6c7;
}

.paper-askbar__divider {
  width: 1px;
  height: 22px;
  margin-inline: 3px;
  background: #48524d;
}

.paper-askbar__form {
  padding: 8px;
  border-top: 1px solid #48524d;
}

.paper-askbar__form label {
  display: block;
}

.paper-askbar__input {
  width: 100%;
  min-height: 66px;
  resize: vertical;
  padding: 9px 10px;
  border: 1px solid #56625b;
  border-radius: 3px;
  outline: 0;
  background: #161c19;
  color: white;
  font-size: 0.76rem;
}

.paper-askbar__input:focus {
  border-color: #8fb9a9;
}

.paper-askbar__form-actions {
  display: flex;
  justify-content: flex-end;
  gap: 6px;
  margin-top: 7px;
}

.paper-askbar__cancel,
.paper-askbar__submit {
  padding: 6px 9px;
  border-radius: 3px;
  color: #c2cbc6;
  font-size: 0.7rem;
}

.paper-askbar__submit {
  background: #d1674e;
  color: white;
}

.paper-comment-dialog {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: grid;
  padding: 18px;
  place-items: center;
}

.paper-comment-dialog__backdrop {
  position: absolute;
  inset: 0;
  background: rgb(18 24 21 / 58%);
  backdrop-filter: blur(3px);
}

.paper-comment-dialog__card {
  position: relative;
  width: min(580px, 100%);
  max-height: calc(100vh - 36px);
  padding: 28px;
  overflow: auto;
  border: 1px solid var(--ink);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.paper-comment-dialog__card > header {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 20px;
}

.paper-comment-dialog__card h2 {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 1.65rem;
}

.icon-button {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 50%;
  color: var(--ink-soft);
  font-size: 1.25rem;
}

.paper-comment-dialog__context {
  margin: 18px 0;
  padding: 10px 12px;
  border-left: 2px solid var(--green);
  background: var(--green-soft);
  color: var(--green);
  font-size: 0.75rem;
}

.field-label {
  display: grid;
  gap: 7px;
  margin-top: 15px;
  color: var(--ink-soft);
  font-size: 0.74rem;
  font-weight: 700;
}

.field-label small {
  color: var(--ink-faint);
  font-weight: 400;
}

.field-label input,
.field-label textarea {
  width: 100%;
  padding: 11px 12px;
  border: 1px solid var(--line-strong);
  border-radius: 2px;
  outline: 0;
  background: white;
  font-size: 0.88rem;
  font-weight: 400;
}

.field-label textarea {
  min-height: 145px;
  resize: vertical;
}

.field-label input:focus,
.field-label textarea:focus {
  border-color: var(--green);
  box-shadow: 0 0 0 3px rgb(36 98 78 / 10%);
}

.paper-comment-dialog__actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 22px;
}

.paper-toast {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 130;
  max-width: min(360px, calc(100vw - 36px));
  padding: 11px 14px;
  border: 1px solid #3c4a43;
  border-radius: 3px;
  background: #202824;
  box-shadow: var(--shadow);
  color: white;
  font-size: 0.76rem;
}

.has-modal {
  overflow: hidden;
}

@media (min-width: 1500px) {
  .paper-doc {
    gap: 70px;
  }
}

@media (max-width: 1179px) {
  .paper-doc {
    grid-template-columns: 190px minmax(0, 760px);
    gap: 42px;
  }

  .paper-rail {
    position: static;
    grid-column: 2;
    max-height: none;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    margin-top: 20px;
    overflow: visible;
  }
}

@media (max-width: 1119px) {
  .paper-doc {
    display: block;
    width: min(100% - 30px, 760px);
    padding-top: 28px;
  }

  .paper-sidebar {
    position: relative;
    top: auto;
    z-index: 10;
    display: flex;
    max-height: none;
    align-items: center;
    gap: 14px;
    margin: 0 0 42px;
    padding: 10px 0;
    overflow: auto;
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
  }

  .paper-sidebar__label {
    flex: none;
    margin: 0;
  }

  .paper-map {
    display: flex;
    flex: none;
  }

  .paper-map a {
    padding: 7px 9px;
    border: 0;
    white-space: nowrap;
  }

  .paper-rail {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    margin-top: 60px;
  }

  .claim-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 860px) {
  .library-header,
  .library-footer,
  .library-intro,
  .paper-library,
  .paper-topbar,
  .paper-doc {
    width: min(100% - 30px, 760px);
  }

  .library-intro {
    min-height: 440px;
    padding: 78px 0 66px;
  }

  .paper-library__header {
    align-items: stretch;
    flex-direction: column;
  }

  .paper-search {
    width: 100%;
  }

  .paper-grid {
    grid-template-columns: 1fr;
  }

  .paper-card:nth-child(odd) {
    border-right: 0;
  }

  .paper-doc {
    display: block;
    padding-top: 28px;
  }

  .paper-sidebar {
    position: relative;
    top: auto;
    z-index: 10;
    display: flex;
    max-height: none;
    align-items: center;
    gap: 14px;
    margin: 0 0 42px;
    padding: 10px 0;
    overflow: auto;
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
  }

  .paper-sidebar__label {
    flex: none;
    margin: 0;
  }

  .paper-map {
    display: flex;
    flex: none;
  }

  .paper-map a {
    padding: 7px 9px;
    border: 0;
    white-space: nowrap;
  }

  .paper-rail {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    margin-top: 60px;
  }

  .claim-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 600px) {
  .library-header .quiet-link,
  .paper-topbar__meta {
    display: none;
  }

  .library-intro h1 {
    font-size: clamp(2.65rem, 14vw, 4rem);
  }

  .library-intro__copy {
    margin-top: 28px;
  }

  .paper-card__link {
    min-height: 330px;
    padding-inline: 8px;
  }

  .paper-empty {
    display: block;
  }

  .paper-empty__index {
    display: block;
    margin-bottom: 20px;
  }

  .library-footer {
    gap: 14px;
    flex-direction: column;
  }

  .paper-title {
    font-size: clamp(2.35rem, 13vw, 3.4rem);
  }

  .paper-byline {
    margin-bottom: 34px;
  }

  .research-purpose,
  .core-conclusion,
  .term-bridge,
  .formula-card {
    padding: 21px 18px;
  }

  .paper-main p,
  .paper-main li {
    font-size: 0.97rem;
  }

  .formula-legend__row {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .paper-rail {
    grid-template-columns: 1fr;
  }

  .paper-askbar__actions {
    flex-wrap: wrap;
  }

  .paper-askbar__label,
  .paper-askbar__divider {
    display: none;
  }

  .paper-comment-dialog__card {
    padding: 22px 18px;
  }

  .paper-comment__header {
    align-items: flex-start;
    flex-direction: column;
    gap: 4px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}

@media print {
  body {
    background: white;
  }

  body::before,
  .paper-topbar,
  .paper-sidebar,
  .paper-rail,
  .paper-askbar,
  .paper-comment-dialog,
  .paper-toast {
    display: none !important;
  }

  .paper-doc {
    display: block;
    width: 100%;
    padding: 0;
  }

  .paper-main {
    max-width: none;
  }
}