:root {
  --green900: #174d3f;
  --green600: #1e6b54;
  --mint100: #dff1e9;
  --surface: #f3f6f3;
  --line: #dfe8e3;
  --text: #17372e;
  --muted: #52695f;
  --white: #fff;
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

html,
body {
  max-width: 100%;
  overflow-x: clip;
}

body {
  margin: 0;
  background: var(--surface);
  color: var(--text);
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", "Microsoft YaHei", "PingFang SC", sans-serif;
}

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

button,
.button-link {
  min-height: 44px;
  border: 1px solid var(--green900);
  border-radius: 6px;
  background: var(--green900);
  color: #fff;
  padding: 9px 14px;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

button:hover,
.button-link:hover {
  background: #103d31;
}

button:active {
  transform: translateY(1px);
}

button:disabled,
input:disabled,
select:disabled {
  cursor: not-allowed;
  opacity: .6;
}

.skip-link {
  min-height: 44px;
  display: flex;
  align-items: center;
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 10;
  transform: translateY(-150%);
  background: #fff;
  color: var(--green900);
  padding: 8px;
}

.skip-link:focus {
  transform: none;
}

.sidebar {
  position: fixed;
  inset: 0 auto 0 0;
  width: 236px;
  background: var(--green900);
  color: #fff;
  padding: 24px 16px;
}

.brand {
  min-height: 44px;
  display: flex;
  gap: 10px;
  align-items: center;
  color: #fff;
  text-decoration: none;
  font-weight: 700;
}

.brand img {
  width: 32px;
  height: 32px;
}

.sidebar nav {
  display: grid;
  gap: 4px;
  margin: 32px 0;
}

.sidebar nav a {
  min-height: 44px;
  display: flex;
  align-items: center;
  color: #e9f6ef;
  padding: 10px 12px;
  border-radius: 5px;
  text-decoration: none;
}

.sidebar nav a:hover,
.sidebar nav a[aria-current] {
  background: #286452;
  color: #fff;
}

.sidebar-note {
  color: #c5ded2;
  font-size: 13px;
}

.access-dialog {
  width: min(420px, calc(100% - 32px));
  border: 0;
  border-radius: 10px;
  padding: 0;
  box-shadow: 0 20px 60px rgb(12 45 36 / 35%);
}

.access-dialog::backdrop {
  background: rgb(11 38 31 / 72%);
}

.access-dialog form {
  display: grid;
  gap: 14px;
  padding: 28px;
}

.access-dialog img {
  width: 44px;
  height: 44px;
}

.access-dialog h2,
.access-dialog p {
  margin: 0;
}

.access-dialog input,
.access-dialog button {
  width: 100%;
  min-height: 44px;
}

.access-fields {
  display: grid;
  gap: 8px;
}

.shell {
  margin-left: 236px;
  min-width: 0;
}

.topbar {
  min-height: 72px;
  background: #fff;
  border-bottom: 1px solid var(--line);
  padding: 14px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.search-box {
  min-width: 0;
  display: flex;
  gap: 8px;
  align-items: center;
}

.topbar input {
  width: min(280px, 100%);
}

.project-tools {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
  min-width: 0;
}

.project-tools label {
  font-weight: 600;
}

.topbar select {
  min-height: 44px;
  max-width: 240px;
}

input,
select,
textarea {
  min-height: 44px;
  border: 1px solid #9aada4;
  border-radius: 8px;
  padding: 9px 11px;
  background: #fff;
  color: var(--text);
}

textarea {
  min-height: 144px;
  resize: vertical;
}

main {
  max-width: 1400px;
  margin: auto;
  padding: 28px;
}

.hero {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: start;
  margin-bottom: 24px;
}

.eyebrow {
  margin: 0 0 4px;
  color: var(--green600);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .06em;
}

.hero h1 {
  font-size: clamp(25px, 3vw, 36px);
  line-height: 1.2;
  margin: 0;
}

.hero p:not(.eyebrow) {
  margin: 7px 0 0;
  color: var(--muted);
}

.countdown {
  min-width: 230px;
  padding: 14px 16px;
  border-left: 4px solid var(--green600);
  background: var(--mint100);
}

.countdown span,
.countdown small,
.metrics span,
.metrics small {
  display: block;
  color: var(--muted);
}

.countdown strong {
  display: block;
  font-size: 18px;
  margin: 3px 0;
}

.metrics {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin-bottom: 20px;
}

.metrics article,
.panel {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.module-view { margin-top: 20px; }
.module-view[data-route="notes"] { max-width: 820px; }
.module-view[data-route="literature"] { max-width: 980px; }
.module-view[data-route="reader"] { max-width: none; }
.module-view[data-route="matrix"] { max-width: none; }
.module-view[data-route="materials"] { max-width: 1100px; }
.module-view[data-route="review-outline"] { max-width: 1100px; }
.module-view[data-route="review-writing"] { max-width: none; }
.module-view[data-route="review-check"] { max-width: 1180px; }
.module-view[data-route="citation-check"] { max-width: 1180px; }
.module-view[data-route="review-final"] { max-width: 1050px; }
.module-view > h2 { font-size: 24px; margin: 0 0 20px; }

.review-workbench-header {
  display: grid;
  gap: 18px;
  margin-bottom: 24px;
  padding: 22px;
  border: 1px solid #b8d9c9;
  border-radius: 14px;
  background: linear-gradient(135deg, #f7fbf9, #edf6f1);
}

.review-workbench-header > div > span { color: var(--green900); font-size: 13px; font-weight: 700; letter-spacing: .08em; }
.review-workbench-header h2 { margin: 4px 0 6px; font-size: 28px; }
.review-workbench-header p { margin: 0; color: var(--muted); }
.review-step-list { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 8px; }
.review-step-list a {
  display: flex;
  min-width: 0;
  min-height: 58px;
  align-items: center;
  gap: 9px;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
  color: var(--text);
  text-decoration: none;
}

.review-step-list a > span { display: grid; width: 28px; height: 28px; flex: 0 0 28px; place-items: center; border-radius: 50%; background: #edf4f0; color: var(--green900); font-size: 13px; font-weight: 750; }
.review-step-list a > strong { overflow: hidden; font-size: 14px; text-overflow: ellipsis; white-space: nowrap; }
.review-step-list a:hover { border-color: #7ca994; background: #f8fbf9; }
.review-step-list a[aria-current="step"] { border-color: var(--green900); background: var(--green900); color: #fff; box-shadow: 0 7px 18px rgb(22 83 66 / 14%); }
.review-step-list a[aria-current="step"] > span { background: #fff; color: var(--green900); }
.review-check-tabs { display: flex; flex-wrap: wrap; gap: 8px; margin-right: auto; }
.review-check-tabs a[aria-current="page"] { border-color: var(--green900); background: #edf4f0; font-weight: 700; }
.module-view .module-form { display: grid; gap: 18px; max-width: 720px; }
.module-view .module-form > label,
.module-view .module-form .note-fields-grid > label,
.module-view .module-form .literature-fields-grid > label { margin: 0; }
.module-view .module-form input,
.module-view .module-form select,
.module-view .module-form textarea { width: 100%; margin-top: 7px; }
.module-view ul { padding-left: 20px; }
.backup-controls { display: grid; gap: 12px; padding-bottom: 20px; margin-bottom: 20px; border-bottom: 1px solid var(--line); }
.backup-controls h3, .backup-controls p { margin: 0; }

.metrics article {
  padding: 16px;
}

.metrics strong {
  display: block;
  font-size: 25px;
  margin: 4px 0;
}

.content-grid {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(280px, 1fr);
  gap: 20px;
}

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

.page-heading h1 {
  font-size: clamp(25px, 3vw, 34px);
  line-height: 1.25;
  margin: 0;
}

.page-heading p:not(.eyebrow) {
  color: var(--muted);
  margin: 6px 0 0;
}

.button-link.secondary {
  background: #fff;
  color: var(--green900);
}

.secondary-action,
.danger-action {
  background: #fff;
  color: var(--green900);
}

.danger-action {
  border-color: #b84c43;
  color: #8b2d25;
}

.secondary-action:hover { background: #edf5f1; }
.danger-action:hover { background: #fbe9e7; }

.planning-grid {
  display: grid;
  grid-template-columns: minmax(280px, .8fr) minmax(460px, 1.2fr);
  gap: 20px;
  align-items: start;
}

.content-grid > div {
  display: grid;
  align-content: start;
  gap: 20px;
  min-width: 0;
}

.panel {
  padding: 20px;
  min-width: 0;
}

.accent {
  background: var(--mint100);
  border-color: #b8d9c9;
}

.section-head {
  display: flex;
  justify-content: space-between;
  gap: 12px;
}

.panel h2 {
  font-size: 19px;
  line-height: 1.3;
  margin: 0 0 12px;
}

.panel h3 {
  font-size: 16px;
  margin: 0;
}

.panel p {
  margin: 8px 0;
}

.empty,
.help {
  color: var(--muted);
}

.timeline {
  padding-left: 22px;
  margin: 12px 0;
}

.timeline li {
  padding: 7px 0 7px 10px;
}

.text-link {
  color: var(--green900);
  font-weight: 650;
  text-underline-offset: 3px;
}

.task-preview-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 13px 0;
  border-bottom: 1px solid #b8d9c9;
}

.task-preview-row:last-child { border-bottom: 0; }
.task-preview-row strong,
.task-preview-row small { display: block; }
.task-preview-row small { color: var(--muted); margin-top: 2px; }

.status-chip,
.tag-chip,
.link-chip {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  border-radius: 999px;
  padding: 3px 10px;
  font-size: 13px;
  line-height: 1.3;
  white-space: nowrap;
}

.status-chip { background: var(--mint100); color: var(--green900); }

.upload-row {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
}

.upload-row input {
  min-width: 0;
  max-width: 100%;
}

form label {
  display: block;
  margin: 12px 0 5px;
  font-weight: 600;
}

fieldset {
  border: 1px solid var(--line);
  margin: 16px 0;
  padding: 12px;
  min-width: 0;
}

legend {
  font-weight: 700;
}

.candidate {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr) 150px;
  gap: 8px;
  align-items: end;
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
  min-height: 44px;
}

.candidate:last-child {
  border: 0;
}

.candidate label {
  min-height: 44px;
  margin: 0;
  min-width: 0;
}

.candidate-toggle {
  min-width: 44px;
  min-height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.candidate input[type="checkbox"] {
  width: 20px;
  height: 20px;
  margin: 0;
}

.candidate input[type="text"],
.candidate input[type="date"] {
  width: 100%;
}

.candidate input[type="date"] {
  width: 100%;
  min-width: 0;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th,
td {
  text-align: left;
  padding: 8px 0;
  border-bottom: 1px solid var(--line);
}

td {
  text-align: right;
}

.error-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 12px 28px;
}

.notice {
  margin: 0;
  padding: 10px 12px;
  border-radius: 5px;
  flex: 1;
}

.error,
.dialog-error {
  background: #fbe9e7;
  color: #82251b;
  border: 1px solid #e7aaa4;
}

.dialog-error {
  padding: 10px 12px;
}

.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;
}

:focus-visible {
  outline: 3px solid #fff;
  outline-offset: 3px;
  box-shadow: 0 0 0 6px var(--green900);
}

h1[tabindex="-1"]:focus,
h2[tabindex="-1"]:focus,
section[tabindex="-1"]:focus {
  outline: 0;
  box-shadow: none;
}

dialog {
  border: 0;
  border-radius: 8px;
  color: var(--text);
  padding: 24px;
  width: min(440px, calc(100% - 32px));
}

dialog::backdrop {
  background: rgb(16 43 34 / .45);
}

dialog h2 {
  margin-top: 0;
}

dialog input,
dialog select {
  width: 100%;
}

#task-form {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin: 20px 0 24px;
}

#task-form label {
  display: grid;
  gap: 4px;
}

#task-form input,
#task-form select {
  width: 100%;
}

#task-form label:first-child,
#task-form button { grid-column: 1 / -1; }

#task-form button { justify-self: start; min-width: 132px; }

.task-list-head,
.note-library-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-top: 18px;
  border-top: 1px solid #b8d9c9;
}

.task-list-head span,
.note-library-head span { color: var(--muted); font-size: 14px; }

.task-row,
.chapter-row {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 10px;
  min-height: 44px;
}

.task-row input {
  width: 44px;
  height: 44px;
}

.task-row small {
  grid-column: 2 / -1;
}

.note-form {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fbfdfc;
}

.literature-form {
  max-width: none !important;
  margin: 18px 0 0;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fbfdfc;
}

.literature-paste-panel,
.chapter-paste-panel {
  display: grid;
  gap: 10px;
  padding: 18px;
  border: 1px solid #b8d9c9;
  border-radius: 10px;
  background: #f4f8f6;
}

.literature-paste-panel h3,
.chapter-paste-panel h3 { margin: 0; font-size: 18px; }
.literature-paste-panel p,
.chapter-paste-panel p { margin: 0; color: var(--muted); }
.literature-paste-panel label,
.chapter-paste-panel label { margin: 4px 0 0; }
.literature-paste-panel textarea,
.chapter-paste-panel textarea { min-height: 150px; margin: 0; line-height: 1.6; }
.literature-paste-panel button,
.chapter-paste-panel button { justify-self: start; }
.literature-abstract-field textarea { min-height: 180px; line-height: 1.7; }

.note-fields-grid,
.literature-fields-grid {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(160px, 1fr);
  gap: 16px;
}

.form-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
}

.form-actions button {
  min-width: 128px;
}

.optional-links {
  border-top: 1px solid var(--line);
  padding-top: 14px;
}

.optional-links summary {
  cursor: pointer;
  color: var(--green900);
  font-weight: 650;
}

.optional-links .note-fields-grid { margin-top: 16px; }

.note-reading-fields { display: grid; grid-template-columns: 140px minmax(0, 1fr); gap: 16px; margin-top: 16px; }
.note-reading-fields label { margin: 0; }
.note-quote,
.reader-note-list blockquote { margin: 12px 0; padding: 10px 12px; border-left: 3px solid #7ca994; background: #f4f8f6; color: var(--muted); white-space: pre-line; }
.page-chip { display: inline-flex; margin-top: 8px; padding: 4px 9px; border-radius: 999px; background: #edf4f0; color: var(--green900); font-size: 13px; }
.pdf-identify { display: flex; align-items: center; flex-wrap: wrap; gap: 10px; }
.pdf-identify span { color: var(--muted); font-size: 14px; }

.reader-toolbar { display: flex; align-items: center; justify-content: space-between; gap: 18px; margin-bottom: 16px; }
.reader-toolbar > div { display: grid; gap: 3px; text-align: right; }
.reader-toolbar span { color: var(--muted); font-size: 13px; }
.secondary-link { background: #fff; color: var(--green900); }
.reader-layout { display: grid; grid-template-columns: minmax(520px, 1.65fr) minmax(320px, .85fr); gap: 16px; align-items: start; }
.pdf-pane { min-height: 760px; overflow: hidden; border: 1px solid var(--line); border-radius: 10px; background: #4b5350; }
.pdf-pane iframe { display: block; width: 100%; height: 760px; border: 0; }
.reader-side { display: grid; gap: 14px; max-height: 760px; overflow-y: auto; padding-right: 3px; }
.reader-progress,
.reader-note-form,
.reader-note-list { display: grid; gap: 12px; margin: 0; padding: 18px; border: 1px solid var(--line); border-radius: 10px; background: #fbfdfc; }
.reader-progress h3,
.reader-note-form h3,
.reader-note-list h3 { margin: 0; font-size: 17px; }
.reader-progress label,
.reader-note-form label { margin: 0; }
.reader-progress input,
.reader-note-form input,
.reader-note-form select,
.reader-note-form textarea { width: 100%; margin-top: 7px; }
.reader-note-form textarea { min-height: 92px; }
.reader-note-list article { padding-top: 12px; border-top: 1px solid var(--line); }
.reader-note-list article p { margin-bottom: 0; white-space: pre-line; }

.matrix-intro { margin-top: -8px; color: var(--muted); }
.matrix-stats { display: flex; flex-wrap: wrap; gap: 8px; margin: 14px 0; }
.matrix-stats span { padding: 6px 10px; border-radius: 999px; background: #edf4f0; color: var(--green900); font-size: 14px; }
.matrix-tools { display: grid; grid-template-columns: minmax(240px, 1fr) 180px auto; gap: 12px; align-items: end; margin-bottom: 16px; }
.matrix-tools label { margin: 0; }
.matrix-tools input,
.matrix-tools select { width: 100%; margin-top: 7px; }
.matrix-table-wrap { overflow: auto; border: 1px solid var(--line); border-radius: 10px; background: #fff; }
.review-matrix { width: 100%; min-width: 1420px; border-collapse: separate; border-spacing: 0; font-size: 14px; }
.review-matrix th { position: sticky; top: 0; z-index: 2; padding: 11px 10px; border-bottom: 1px solid var(--line); background: #edf4f0; color: var(--green900); text-align: left; }
.review-matrix td { min-width: 170px; padding: 12px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }
.review-matrix tr:last-child td { border-bottom: 0; }
.review-matrix th:first-child,
.review-matrix td:first-child { position: sticky; left: 0; z-index: 1; min-width: 220px; max-width: 260px; background: #fff; box-shadow: 1px 0 var(--line); }
.review-matrix th:first-child { z-index: 3; background: #edf4f0; }
.review-matrix td:nth-child(4),
.review-matrix td:nth-child(5) { min-width: 230px; }
.review-matrix td:nth-child(6) { min-width: 150px; }
.review-matrix td:last-child { min-width: 100px; }
.review-matrix strong,
.review-matrix small { display: block; }
.review-matrix small { margin: 7px 0; color: var(--muted); }
.review-matrix textarea,
.review-matrix select { width: 100%; margin: 0; font-size: 14px; }
.review-matrix textarea { min-height: 82px; resize: vertical; line-height: 1.5; }
.review-matrix button { width: 100%; min-height: 38px; margin-bottom: 8px; padding: 7px 10px; }
.review-matrix .matrix-material { min-height: 34px; margin: 7px 0 0; border: 1px dashed #7ca994; background: #f4f8f6; color: var(--green900); font-size: 13px; }

.materials-intro { margin-top: -8px; color: var(--muted); }
.materials-toolbar { display: flex; flex-wrap: wrap; gap: 10px; margin: 18px 0 14px; }
.materials-stats { display: flex; flex-wrap: wrap; gap: 8px; }
.materials-stats span { padding: 6px 10px; border-radius: 999px; background: #edf4f0; color: var(--green900); font-size: 14px; }
.materials-filter { display: block; max-width: 340px; margin: 20px 0; }
.materials-filter select { width: 100%; margin-top: 7px; }
.materials-groups { display: grid; gap: 18px; }
.material-topic { padding: 20px; border: 1px solid var(--line); border-radius: 12px; background: #fbfdfc; }
.material-topic-head,
.material-card-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; }
.material-topic-head { margin-bottom: 14px; }
.material-topic-head p,
.material-topic-head h3 { margin: 0; }
.material-topic-head h3 { margin-top: 3px; font-size: 21px; }
.material-card-list { display: grid; grid-template-columns: repeat(auto-fit, minmax(340px, 1fr)); gap: 12px; }
.material-card { padding: 16px; border: 1px solid var(--line); border-radius: 10px; background: #fff; }
.material-card-head h4 { margin: 0 0 5px; font-size: 17px; }
.material-card-head span { color: var(--muted); font-size: 14px; }
.material-card-head button { flex: 0 0 auto; min-height: 38px; padding: 7px 10px; }
.material-card dl { display: grid; grid-template-columns: 90px minmax(0, 1fr); margin: 16px 0 0; border-top: 1px solid var(--line); }
.material-card dt,
.material-card dd { margin: 0; padding: 10px 0; border-bottom: 1px solid var(--line); }
.material-card dt { color: var(--green900); font-weight: 700; }
.material-card dd { color: var(--text); line-height: 1.6; white-space: pre-line; }
.material-warning { display: inline-flex; margin: 12px 0 0; padding: 5px 9px; border-radius: 999px; background: #fff2d9; color: #755315; font-size: 13px; }

.outline-intro { margin-top: -8px; color: var(--muted); }
.outline-toolbar { display: flex; flex-wrap: wrap; gap: 10px; margin: 18px 0 14px; }
.outline-stats { display: flex; flex-wrap: wrap; gap: 8px; }
.outline-stats span { padding: 6px 10px; border-radius: 999px; background: #edf4f0; color: var(--green900); font-size: 14px; }
.outline-workspace { display: grid; grid-template-columns: 190px minmax(0, 1fr); gap: 18px; margin-top: 20px; align-items: start; }
.outline-toc { position: sticky; top: 16px; display: grid; gap: 5px; padding: 14px; border: 1px solid var(--line); border-radius: 10px; background: #fbfdfc; }
.outline-toc strong { margin-bottom: 5px; color: var(--green900); }
.outline-toc button { min-height: 38px; padding: 7px 9px; border-color: transparent; background: transparent; color: var(--text); text-align: left; }
.outline-toc button:hover { background: #edf4f0; }
.outline-content { display: grid; gap: 16px; }
.outline-card { padding: 20px; scroll-margin-top: 18px; border: 1px solid var(--line); border-radius: 12px; background: #fff; }
.outline-card > p:first-child,
.outline-card-head p { margin: 0 0 3px; color: var(--green700); font-size: 13px; font-weight: 700; }
.outline-card h3 { margin: 0; font-size: 21px; }
.outline-card-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; margin-bottom: 16px; }
.outline-card-head button { flex: 0 0 auto; }
.outline-card > section { padding: 14px 0; border-top: 1px solid var(--line); }
.outline-card h4 { margin: 0 0 9px; color: var(--green900); font-size: 16px; }
.outline-card ul { margin: 0; padding-left: 21px; }
.outline-card li { margin: 6px 0; line-height: 1.65; white-space: pre-line; }
.outline-card section > p { margin: 10px 0 0; padding: 9px 11px; border-left: 3px solid #d3a551; background: #fff8e8; color: #6d5422; }

.writing-intro { margin-top: -8px; color: var(--muted); }
.writing-toolbar { display: flex; flex-wrap: wrap; gap: 10px; margin: 18px 0; }
.review-writing-workspace { display: grid; grid-template-columns: minmax(320px, 42%) minmax(420px, 1fr); gap: 18px; align-items: start; }
.writing-source-pane,
.writing-editor { overflow: hidden; border: 1px solid var(--line); border-radius: 12px; background: #fff; }
.writing-section-nav { display: flex; gap: 6px; overflow-x: auto; padding: 12px; border-bottom: 1px solid var(--line); background: #f4f8f6; }
.writing-section-nav button { flex: 0 0 auto; min-height: 36px; padding: 6px 10px; border-color: transparent; background: transparent; color: var(--text); }
.writing-section-nav button.active { border-color: #7ca994; background: #fff; color: var(--green900); }
.writing-source-content { max-height: calc(100vh - 300px); overflow: auto; padding: 0 18px 18px; }
.writing-source-content section { padding: 16px 0; border-bottom: 1px solid var(--line); }
.writing-source-content section:last-child { border-bottom: 0; }
.writing-source-content h4 { margin: 0 0 9px; color: var(--green900); }
.writing-source-content p,
.writing-source-content ul { margin: 0; }
.writing-source-content li { margin: 6px 0; line-height: 1.6; white-space: pre-line; }
.writing-citations { display: flex; flex-wrap: wrap; gap: 7px; }
.writing-citations h4,
.writing-citations p { flex-basis: 100%; }
.writing-citations button { min-height: 34px; padding: 5px 9px; border-color: #9ac0ad; background: #f4f8f6; color: var(--green900); }
.writing-editor { position: sticky; top: 16px; padding: 20px; }
.writing-editor-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 18px; }
.writing-editor-head p,
.writing-editor-head h3 { margin: 0; }
.writing-editor-head p { color: var(--green700); font-size: 13px; font-weight: 700; }
.writing-editor-head h3 { margin-top: 3px; font-size: 21px; }
.writing-save-state { flex: 0 0 auto; color: var(--muted); font-size: 14px; }
.writing-prompt { margin: 15px 0; padding: 10px 12px; border-left: 3px solid #d3a551; background: #fff8e8; color: #6d5422; }
.writing-editor textarea { width: 100%; min-height: 480px; resize: vertical; line-height: 1.8; }
.writing-editor-foot { display: flex; align-items: center; gap: 14px; margin-top: 12px; color: var(--muted); font-size: 14px; }
.writing-editor-foot button { margin-left: auto; }

.chapter-writing-toolbar { display: flex; align-items: center; gap: 12px; margin: 18px 0; }
.chapter-writing-toolbar > span { margin-left: auto; color: var(--muted); font-size: 14px; }
.chapter-writing-workspace { display: grid; grid-template-columns: minmax(190px, 230px) minmax(420px, 1fr) minmax(280px, 340px); gap: 16px; align-items: start; }
.chapter-writing-nav,
.chapter-writing-materials { overflow: hidden; border: 1px solid var(--line); border-radius: 12px; background: #fff; }
.chapter-writing-nav { position: sticky; top: 16px; max-height: calc(100vh - 100px); overflow-y: auto; padding: 14px 10px; }
.chapter-writing-nav h3,
.chapter-writing-materials h3 { margin: 0; color: var(--green900); font-size: 17px; }
.chapter-writing-nav nav { display: grid; gap: 4px; margin-top: 12px; }
.chapter-writing-nav button { width: 100%; min-height: 38px; padding: 7px 9px 7px var(--chapter-indent, 9px); border-color: transparent; background: transparent; color: var(--text); text-align: left; }
.chapter-writing-nav button:hover,
.chapter-writing-nav button.active { border-color: #9ac0ad; background: #edf6f1; color: var(--green900); }
.chapter-editor { min-width: 0; }
.chapter-writing-materials { position: sticky; top: 16px; max-height: calc(100vh - 100px); overflow-y: auto; padding: 14px; }
.chapter-material-head { display: grid; gap: 9px; }
.chapter-material-head select { width: 100%; }
.chapter-writing-materials > button { width: 100%; margin: 10px 0 2px; }
.chapter-material-content { display: grid; gap: 10px; margin-top: 12px; }
.chapter-material-content > p { margin: 0; color: var(--muted); }
.chapter-material-card,
.chapter-note-materials article { padding: 12px; border: 1px solid var(--line); border-radius: 9px; background: #f8fbf9; }
.chapter-material-card > div { display: flex; align-items: flex-start; justify-content: space-between; gap: 8px; }
.chapter-material-actions { display: flex; align-items: center; gap: 7px; }
.chapter-material-actions input { width: 18px; height: 18px; margin: 6px 0; accent-color: var(--green700); }
.chapter-material-card > div button { min-height: 30px; padding: 4px 7px; border-color: #9ac0ad; background: #fff; color: var(--green900); font-size: 12px; }
.chapter-material-card p { margin: 8px 0 0; line-height: 1.55; white-space: pre-line; }
.chapter-material-card p > strong { color: var(--green900); }
.chapter-note-materials { padding-top: 10px; border-top: 1px solid var(--line); }
.chapter-note-materials h4 { margin: 0 0 9px; }
.chapter-note-materials > p { margin: 0; color: var(--muted); }
.chapter-note-materials article { margin-top: 8px; background: #fff; }
.chapter-note-materials article p,
.chapter-note-materials blockquote { margin: 8px 0 0; line-height: 1.6; }
.chapter-ai-panel { margin-top: 12px; padding: 11px; border: 1px solid #9fc0b0; border-radius: 9px; background: #f3f8f5; }
.chapter-ai-panel summary { cursor: pointer; color: var(--green900); font-weight: 800; }
.chapter-ai-panel[open] summary { margin-bottom: 10px; }
.ai-safety-note,
.ai-config-status,
.ai-output-meta { margin: 8px 0; color: var(--muted); font-size: 12px; line-height: 1.5; }
.ai-config-status { color: var(--green900); font-weight: 700; }
.ai-config-fields,
.ai-generate-fields { display: grid; gap: 8px; }
.ai-config-fields label,
.ai-generate-fields label,
.chapter-ai-panel > label { display: grid; gap: 5px; color: var(--text); font-size: 12px; font-weight: 700; }
.ai-config-fields input,
.ai-generate-fields input,
.ai-generate-fields select,
.ai-generate-fields textarea,
.chapter-ai-panel > label textarea { width: 100%; min-width: 0; font: inherit; }
.ai-generate-fields { grid-template-columns: minmax(0, 1fr) 90px; margin-top: 12px; }
.ai-generate-fields label:last-child { grid-column: 1 / -1; }
.ai-actions { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 8px; }
.ai-actions button { min-height: 34px; padding: 6px 9px; }
.chapter-ai-panel > button { width: 100%; margin-top: 8px; }
.chapter-ai-panel > label { margin-top: 10px; }
.chapter-ai-panel > label textarea { resize: vertical; line-height: 1.6; }
.ai-revision { margin-top: 16px; padding-top: 14px; border-top: 1px solid #bfd4c9; }
.ai-revision h4 { margin: 0; color: var(--green900); }
.ai-revision > button { width: 100%; margin-top: 8px; }
.ai-revision > label { display: grid; gap: 5px; margin-top: 10px; color: var(--text); font-size: 12px; font-weight: 700; }
.ai-revision > label textarea { width: 100%; min-width: 0; resize: vertical; font: inherit; line-height: 1.6; }
.ai-revision > label textarea[readonly] { background: #fff; color: var(--muted); }
.ai-revision .ai-actions button { flex: 1 1 130px; }
.thesis-preview > h1 { margin: 0 0 28px; text-align: center; }
.thesis-preview .thesis-chapter { margin-top: 24px; }
.thesis-preview .thesis-chapter p { line-height: 1.9; white-space: pre-wrap; }
.thesis-preview .depth-1 { margin-left: 16px; }
.thesis-preview .depth-2,
.thesis-preview .depth-3 { margin-left: 32px; }

.review-check-intro { margin-top: -8px; color: var(--muted); }
.review-check-toolbar { display: flex; flex-wrap: wrap; gap: 10px; margin: 18px 0; }
.review-check-stats { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 10px; margin-bottom: 18px; }
.review-check-stats article { padding: 14px 16px; border: 1px solid var(--line); border-radius: 10px; background: #fff; }
.review-check-stats strong { display: block; color: var(--green900); font-size: 22px; }
.review-check-stats span { color: var(--muted); font-size: 13px; }
.review-check-workspace { display: grid; grid-template-columns: 300px minmax(0, 1fr); gap: 18px; align-items: start; }
.review-issues { position: sticky; top: 16px; display: grid; gap: 9px; max-height: calc(100vh - 110px); overflow: auto; padding: 16px; border: 1px solid var(--line); border-radius: 12px; background: #f8fbf9; }
.review-issues h3,
.review-issues p { margin: 0; }
.review-issue { display: grid; gap: 5px; width: 100%; min-height: 0; padding: 11px; border: 1px solid var(--line); border-radius: 9px; background: #fff; color: var(--text); text-align: left; line-height: 1.45; }
button.review-issue:hover { background: #f1f7f4; }
.review-issue.warning { border-left: 4px solid #c78a24; }
.review-issue.info { border-left: 4px solid #769e8b; }
.review-issue-label { color: var(--green700); font-size: 12px; font-weight: 700; }
.review-preview { display: grid; gap: 14px; }
.review-preview-section { padding: 22px; scroll-margin-top: 18px; border: 1px solid var(--line); border-radius: 12px; background: #fff; }
.review-preview-section > div { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; }
.review-preview-section h3 { margin: 0; font-size: 21px; }
.review-badge { flex: 0 0 auto; padding: 4px 8px; border-radius: 999px; background: #e9f3ee; color: var(--green900); font-size: 12px; }
.review-badge.warning { background: #fff2d9; color: #755315; }
.review-preview-body { margin: 18px 0 0; line-height: 1.85; white-space: pre-wrap; }
.review-preview-empty { margin: 18px 0 0; padding: 16px; border: 1px dashed #c5d5cd; border-radius: 8px; color: var(--muted); }
.review-preview-meta { margin: 14px 0 0; color: var(--muted); font-size: 13px; }

.citation-check-intro { margin-top: -8px; color: var(--muted); }
.citation-check-toolbar { display: flex; flex-wrap: wrap; gap: 10px; margin: 18px 0; }
.citation-check-stats { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 10px; margin-bottom: 18px; }
.citation-check-stats article { padding: 14px 16px; border: 1px solid var(--line); border-radius: 10px; background: #fff; }
.citation-check-stats strong { display: block; color: var(--green900); font-size: 22px; }
.citation-check-stats span { color: var(--muted); font-size: 13px; }
.citation-check-workspace { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(300px, .75fr); gap: 18px; align-items: start; }
.citation-check-panel,
.citation-reference-draft { padding: 20px; border: 1px solid var(--line); border-radius: 12px; background: #fff; }
.citation-check-panel > h3,
.citation-reference-draft h3 { margin: 0 0 15px; }
.citation-result { margin-top: 10px; padding: 14px; border: 1px solid var(--line); border-left: 4px solid #c78a24; border-radius: 9px; }
.citation-result.matched { border-left-color: #4f8c70; }
.citation-result > div { display: flex; align-items: flex-start; justify-content: space-between; gap: 15px; }
.citation-result > div span { color: var(--muted); font-size: 13px; }
.citation-result p,
.citation-result ul { margin: 9px 0 0; }
.citation-library-group { padding: 15px 0; border-top: 1px solid var(--line); }
.citation-library-group:first-of-type { border-top: 0; }
.citation-library-group h4,
.citation-library-group p,
.citation-library-group ul { margin: 0; }
.citation-library-group ul { margin-top: 9px; }
.citation-reference-draft { margin-top: 18px; }
.citation-reference-draft pre { overflow: auto; margin: 0; padding: 16px; border-radius: 8px; background: #f4f8f6; color: var(--text); font: inherit; line-height: 1.7; white-space: pre-wrap; }

.final-review-intro { margin-top: -8px; color: var(--muted); }
.final-readiness { display: flex; justify-content: space-between; gap: 18px; margin: 18px 0 12px; padding: 15px 18px; border: 1px solid; border-radius: 10px; }
.final-readiness.ready { border-color: #88b7a0; background: #eaf5ef; color: var(--green900); }
.final-readiness.blocked { border-color: #d5ae68; background: #fff6e5; color: #6d5422; }
.final-readiness span { text-align: right; }
.final-review-toolbar { display: flex; flex-wrap: wrap; gap: 10px; margin: 12px 0 18px; }
.final-review-stats { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 10px; margin-bottom: 18px; }
.final-review-stats article { padding: 14px 16px; border: 1px solid var(--line); border-radius: 10px; background: #fff; }
.final-review-stats strong { display: block; color: var(--green900); font-size: 22px; }
.final-review-stats span { color: var(--muted); font-size: 13px; }
.final-checklist { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-bottom: 18px; }
.final-checklist section { display: grid; align-content: start; gap: 8px; padding: 18px; border: 1px solid var(--line); border-radius: 12px; background: #fff; }
.final-checklist h3,
.final-checklist p { margin: 0; }
.final-check { width: 100%; min-height: 0; padding: 10px 12px; border-radius: 8px; background: #fff; color: var(--text); text-align: left; line-height: 1.45; }
.final-check.blocker { border-color: #d5ae68; }
.final-check.reminder { border-color: #9fc0b0; }
.final-document-preview { padding: clamp(22px, 5vw, 58px); border: 1px solid var(--line); border-radius: 12px; background: #fff; box-shadow: 0 10px 30px rgba(28, 70, 57, .06); }
.final-document-preview > h2 { margin: 0 0 36px; text-align: center; font-size: 28px; }
.final-document-preview article { margin-top: 28px; }
.final-document-preview article h3,
.final-reference-preview h3 { margin: 0 0 14px; font-size: 20px; }
.final-document-preview article p { margin: 0; line-height: 1.9; text-indent: 2em; white-space: pre-wrap; }
.final-document-preview .final-preview-empty { padding: 14px; border: 1px dashed #c5d5cd; border-radius: 8px; color: var(--muted); text-indent: 0; }
.final-reference-preview { margin-top: 34px; }
.final-reference-preview p { margin: 8px 0; line-height: 1.65; padding-left: 2em; text-indent: -2em; }

.note-library {
  max-width: 720px;
  margin-top: 32px;
}

.note-library-head { border-color: var(--line); padding: 0 0 12px; }
.note-library-head h3 { font-size: 18px; margin: 0; }
.note-card-list { display: grid; gap: 12px; }

.note-card {
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
}

.note-card-head {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 16px;
}

.note-card h4 { font-size: 16px; margin: 0; }
.note-excerpt { color: var(--muted); white-space: pre-line; }
.note-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 7px; }
.tag-chip { background: #edf4f0; color: var(--text); }
.link-chip { border: 1px solid #b8d9c9; color: var(--green900); }
.note-meta time { color: var(--muted); font-size: 13px; margin-left: auto; }

.literature-tools {
  padding: 24px;
  border: 1px solid #b8d9c9;
  border-radius: 12px;
  background: var(--mint100);
}

.literature-tools > p { color: var(--muted); }
.literature-tools h3 { font-size: 20px; margin: 0; }

.literature-search-row,
.import-form {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  align-items: end;
}

.literature-search-row label,
.import-form label { margin: 8px 0 0; }
.literature-search-row input,
.import-form input { width: 100%; margin-top: 7px; }

.inline-actions,
.card-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.inline-actions { margin: 16px 0; }
.import-form { grid-template-columns: minmax(0, 1fr) auto; padding-top: 16px; border-top: 1px solid #b8d9c9; }
.library-filter { margin-top: 18px; min-width: 160px; }

.literature-library { margin-top: 32px; }
.literature-card-list { display: grid; gap: 12px; }

.literature-card {
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
}

.literature-card-head {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 16px;
}

.literature-card h4 { font-size: 17px; margin: 0; }
.literature-meta { color: var(--muted); }
.card-actions { margin-top: 14px; padding-top: 14px; border-top: 1px solid var(--line); }
.card-actions button { min-height: 40px; padding: 7px 12px; }

.search-result > a {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

.chapter-row progress {
  width: 100%;
}

.dialog-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 20px;
}

.dialog-actions button:first-child {
  background: #fff;
  color: var(--green900);
}

@media (max-width: 900px) {
  .sidebar {
    position: static;
    width: auto;
    padding: 12px 16px;
  }

  .sidebar nav {
    display: flex;
    overflow: auto;
    margin: 12px 0;
  }

  .sidebar nav a {
    white-space: nowrap;
  }

  .sidebar-note {
    display: none;
  }

  .shell {
    margin: 0;
  }

  .topbar {
    padding: 12px 16px;
    align-items: flex-start;
    flex-wrap: wrap;
  }

  .search-box {
    flex: 1 1 180px;
  }

  .topbar input {
    width: 100%;
  }

  main {
    padding: 20px 16px;
  }

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

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

  .hero {
    flex-direction: column;
  }

  .page-heading {
    align-items: start;
    flex-direction: column;
  }

  .metrics {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  #task-form,
  .note-fields-grid,
  .note-reading-fields,
  .literature-fields-grid,
  .literature-search-row,
  .import-form {
    grid-template-columns: 1fr;
  }

  .reader-toolbar { align-items: flex-start; flex-direction: column; }
  .reader-toolbar > div { text-align: left; }
  .reader-layout { grid-template-columns: 1fr; }
  .pdf-pane { min-height: 520px; }
  .pdf-pane iframe { height: 520px; }
  .reader-side { max-height: none; overflow: visible; }

  .matrix-tools { grid-template-columns: 1fr; }
  .review-workbench-header { padding: 16px; }
  .review-workbench-header h2 { font-size: 24px; }
  .review-step-list { grid-template-columns: repeat(6, minmax(126px, 1fr)); overflow-x: auto; padding-bottom: 5px; }
  .matrix-tools button { width: 100%; }
  .literature-paste-panel button,
  .chapter-paste-panel button { width: 100%; }
  .matrix-table-wrap { overflow: visible; border: 0; background: transparent; }
  .review-matrix { min-width: 0; }
  .review-matrix thead { display: none; }
  .review-matrix,
  .review-matrix tbody,
  .review-matrix tr,
  .review-matrix td { display: block; width: 100%; }
  .review-matrix tr { margin-bottom: 16px; overflow: hidden; border: 1px solid var(--line); border-radius: 10px; background: #fff; }
  .review-matrix td,
  .review-matrix td:nth-child(4),
  .review-matrix td:nth-child(5),
  .review-matrix td:nth-child(6),
  .review-matrix td:last-child { min-width: 0; max-width: none; padding: 12px; border-bottom: 1px solid var(--line); }
  .review-matrix td::before { display: block; margin-bottom: 6px; color: var(--green900); font-size: 13px; font-weight: 700; content: attr(data-label); }
  .review-matrix th:first-child,
  .review-matrix td:first-child { position: static; max-width: none; box-shadow: none; }
  .review-matrix td:last-child { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; border-bottom: 0; }
  .review-matrix td:last-child::before { grid-column: 1 / -1; }
  .review-matrix button { margin: 0; }

  .materials-toolbar > * { width: 100%; }
  .material-topic { padding: 14px; }
  .material-topic-head,
  .material-card-head { flex-direction: column; }
  .material-topic-head button,
  .material-card-head button { width: 100%; }
  .material-card-list { grid-template-columns: 1fr; }
  .material-card dl { grid-template-columns: 1fr; }
  .material-card dt { padding-bottom: 2px; border-bottom: 0; }
  .material-card dd { padding-top: 2px; }

  .outline-toolbar > * { width: 100%; }
  .outline-workspace { grid-template-columns: 1fr; }
  .outline-toc { position: static; grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .outline-toc strong { grid-column: 1 / -1; }
  .outline-card { padding: 15px; }
  .outline-card-head { flex-direction: column; }
  .outline-card-head button { width: 100%; }

  .writing-toolbar > * { width: 100%; }
  .review-writing-workspace { grid-template-columns: 1fr; }
  .writing-source-content { max-height: none; }
  .writing-editor { position: static; padding: 15px; }
  .writing-editor textarea { min-height: 360px; }
  .chapter-writing-toolbar { align-items: stretch; flex-direction: column; }
  .chapter-writing-toolbar > span { margin-left: 0; }
  .chapter-writing-workspace { grid-template-columns: 1fr; }
  .chapter-writing-nav,
  .chapter-writing-materials { position: static; max-height: none; }
  .chapter-writing-nav nav { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .ai-generate-fields { grid-template-columns: 1fr; }
  .ai-generate-fields label:last-child { grid-column: auto; }
  .thesis-preview .depth-1,
  .thesis-preview .depth-2,
  .thesis-preview .depth-3 { margin-left: 0; }

  .review-check-toolbar > * { width: 100%; }
  .review-check-stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .review-check-workspace { grid-template-columns: 1fr; }
  .review-issues { position: static; max-height: none; }
  .review-preview-section { padding: 16px; }

  .citation-check-toolbar > * { width: 100%; }
  .citation-check-stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .citation-check-workspace { grid-template-columns: 1fr; }

  .final-readiness { flex-direction: column; }
  .final-readiness span { text-align: left; }
  .final-review-toolbar > * { width: 100%; }
  .final-review-stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .final-checklist { grid-template-columns: 1fr; }
  .final-document-preview { padding: 20px 16px; }

  .import-form button { width: 100%; }

  .error-row {
    margin: 10px 16px;
  }
}

@media (max-width: 390px) {
  .sidebar nav {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    overflow: visible;
  }

  .sidebar nav a {
    white-space: normal;
    text-align: center;
    justify-content: center;
    padding: 6px;
  }

  .topbar {
    flex-wrap: wrap;
  }

  .search-box,
  .project-tools {
    width: 100%;
    flex-basis: 100%;
  }

  .project-tools {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
  }

  .search-box button { flex: 0 0 auto; }

  .project-tools select {
    width: 100%;
    min-width: 0;
  }

  .project-tools button {
    grid-column: 1 / -1;
  }

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

  .countdown {
    width: 100%;
    min-width: 0;
  }

  .candidate {
    grid-template-columns: 44px minmax(0, 1fr);
  }

  .candidate-toggle {
    grid-column: 1;
    grid-row: 1 / span 2;
  }

  .candidate label:not(.candidate-toggle) {
    grid-column: 2;
  }

  .upload-row > * {
    width: 100%;
  }

  .error-row {
    align-items: stretch;
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition: none !important;
    animation: none !important;
  }
}

@media (prefers-reduced-motion: no-preference) {
  button,
  .button-link,
  .sidebar nav a {
    transition: background-color 180ms ease, transform 180ms ease;
  }
}