:root {
  --ink: #1f2933;
  --muted: #667085;
  --line: #d9e2e7;
  --paper: #f7f9f8;
  --panel: #ffffff;
  --teal: #1f7a72;
  --teal-soft: #dcefed;
  --coral: #c45b4c;
  --amber: #b47a1c;
  --green: #486b3f;
  --blue: #355f7d;
  --shadow: 0 12px 34px rgba(30, 44, 52, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic", "Noto Sans JP", sans-serif;
  line-height: 1.65;
}

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

a {
  color: var(--teal);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: center;
  padding: 14px clamp(18px, 3vw, 42px);
  border-bottom: 1px solid var(--line);
  background: rgba(247, 249, 248, 0.94);
  backdrop-filter: blur(14px);
}

.topbar h1 {
  margin: 0;
  font-size: clamp(22px, 2.4vw, 34px);
  line-height: 1.15;
  letter-spacing: 0;
}

.topbar-actions {
  display: grid;
  justify-items: end;
  gap: 8px;
  min-width: 0;
}

.language-picker {
  display: flex;
  align-items: center;
  gap: 8px;
  color: #31424b;
  font-size: 13px;
  font-weight: 700;
}

.language-picker select {
  min-height: 36px;
  padding: 6px 30px 6px 10px;
  border: 1px solid #bfcbd3;
  border-radius: 8px;
  background: #fff;
  color: var(--ink);
}

.eyebrow {
  margin: 0 0 6px;
  color: var(--teal);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

.topnav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 6px;
}

.topnav a {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 6px 10px;
  border-radius: 8px;
  color: #31424b;
  font-size: 14px;
}

.topnav a:hover {
  background: var(--teal-soft);
  text-decoration: none;
}

main {
  width: min(1480px, 100%);
  margin: 0 auto;
}

.workspace {
  display: grid;
  grid-template-columns: minmax(260px, 320px) 1fr;
  gap: 22px;
  padding: 24px clamp(18px, 3vw, 42px) 18px;
}

.workspace > *,
.main-surface,
.content-band {
  min-width: 0;
}

.control-panel {
  position: sticky;
  top: 92px;
  align-self: start;
  display: grid;
  gap: 14px;
}

.panel-block {
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.panel-block label,
.control-title {
  display: block;
  margin: 0 0 8px;
  color: #31424b;
  font-size: 13px;
  font-weight: 700;
}

#siteSearch {
  width: 100%;
  min-height: 44px;
  padding: 10px 12px;
  border: 1px solid #bfcbd3;
  border-radius: 8px;
  background: #fff;
  color: var(--ink);
}

#siteSearch:focus {
  outline: 3px solid rgba(31, 122, 114, 0.18);
  border-color: var(--teal);
}

.filter-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.filter-chip,
.segment,
.copy-button {
  min-height: 34px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: #34434b;
  cursor: pointer;
}

.filter-chip {
  padding: 5px 9px;
  font-size: 13px;
}

.filter-chip.active,
.segment.active {
  border-color: var(--teal);
  background: var(--teal-soft);
  color: #0e5550;
}

.source-note p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.main-surface,
.content-band {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.main-surface {
  padding: clamp(18px, 3vw, 34px);
}

.intro-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  align-items: stretch;
}

.intro-copy {
  max-width: 980px;
  margin: 0 auto;
  text-align: center;
}

.intro-copy h2 {
  margin: 0 auto;
  max-width: 900px;
  color: #203842;
  font-size: clamp(24px, 3vw, 38px);
  line-height: 1.2;
  letter-spacing: 0;
}

.section-heading h2 {
  margin: 0;
  font-size: clamp(26px, 4vw, 52px);
  line-height: 1.08;
  letter-spacing: 0;
}

.intro-copy p:not(.eyebrow),
.section-heading p:not(.eyebrow) {
  max-width: 780px;
  color: var(--muted);
}

.intro-copy p:not(.eyebrow) {
  margin: 12px auto 0;
  max-width: 720px;
}

.map-figure {
  width: min(100%, 1060px);
  margin: 0 auto;
}

.map-figure img {
  display: block;
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #edf4f2;
}

.map-figure figcaption {
  margin-top: 8px;
  color: var(--muted);
  font-size: 12px;
}

.visual-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.visual-card {
  min-width: 0;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.visual-card-wide {
  grid-column: 1 / -1;
}

.visual-card-heading {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 14px;
}

.visual-card-heading h3 {
  margin: 0;
  color: #203842;
  font-size: 20px;
  line-height: 1.2;
}

.visual-badge,
.chart-legend {
  flex: 0 0 auto;
  color: var(--muted);
  font-size: 12px;
}

.visual-badge {
  padding: 5px 8px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #f8fbfa;
}

.map-frame-wrap {
  aspect-ratio: 16 / 8;
  min-height: 360px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #eaf1f0;
}

.google-map-frame,
.course-map {
  width: 100%;
  height: 100%;
  border: 0;
}

.course-map .leaflet-control-layers {
  border: 1px solid rgba(38, 65, 71, 0.22);
  border-radius: 6px;
  box-shadow: 0 4px 12px rgba(38, 65, 71, 0.12);
}

.course-map .leaflet-control-layers-expanded {
  padding: 9px 12px;
  color: var(--ink);
  font: 13px/1.45 system-ui, sans-serif;
}

.course-map-marker {
  display: grid;
  width: 28px;
  height: 28px;
  place-items: center;
  border: 3px solid #fff;
  border-radius: 50%;
  background: #d94b45;
  box-shadow: 0 2px 8px rgba(23, 42, 46, 0.35);
  color: #fff;
  font: 700 11px/1 system-ui, sans-serif;
}

.course-map .leaflet-popup-content {
  margin: 12px 14px;
  color: var(--ink);
  font: 14px/1.45 system-ui, sans-serif;
}

.course-map .leaflet-popup-content strong {
  display: block;
  margin-bottom: 3px;
}

.map-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  margin-top: 10px;
}

.text-action,
.notebooklm-inline-link {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  color: var(--teal);
  font-size: 13px;
  font-weight: 800;
}

.text-action:hover,
.notebooklm-inline-link:hover {
  color: #0f5550;
}

.visual-note,
.notebooklm-card > p {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.visual-note {
  line-height: 1.55;
}

.scale-diagram {
  display: grid;
  gap: 0;
  padding: 4px 0;
}

.scale-step {
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr);
  column-gap: 10px;
  align-items: center;
  min-height: 48px;
}

.scale-step strong {
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: var(--teal-soft);
  color: var(--teal);
}

.scale-step span {
  color: #263b43;
  font-size: 15px;
  font-weight: 800;
}

.scale-step small {
  grid-column: 2;
  color: var(--muted);
  font-size: 12px;
}

.scale-line {
  width: 1px;
  height: 18px;
  margin-left: 15px;
  background: #a8c9c4;
}

.chart-legend {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  white-space: nowrap;
}

.legend-swatch {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 2px;
}

.legend-swatch.elder {
  background: var(--coral);
}

.legend-swatch.source {
  background: var(--blue);
}

.horizontal-chart {
  display: grid;
  gap: 12px;
}

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

.chart-row-label {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  color: #31424b;
  font-size: 13px;
}

.chart-row-label strong {
  color: #203842;
}

.chart-track {
  height: 12px;
  overflow: hidden;
  border-radius: 999px;
  background: #e8edf0;
}

.chart-fill {
  height: 100%;
  min-width: 4px;
  border-radius: inherit;
  background: var(--coral);
}

.chart-fill.source-fill {
  background: var(--blue);
}

.chart-row small {
  color: var(--muted);
  font-size: 11px;
}

.time-track {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
  position: relative;
}

.time-track::before {
  content: "";
  position: absolute;
  top: 17px;
  right: 10%;
  left: 10%;
  height: 2px;
  background: #b9d1ce;
}

.time-point {
  position: relative;
  z-index: 1;
  display: grid;
  justify-items: center;
  gap: 4px;
  text-align: center;
}

.time-point span {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border: 4px solid #fff;
  border-radius: 50%;
  background: var(--teal);
  color: #fff;
  font-size: 12px;
  font-weight: 800;
  box-shadow: 0 0 0 1px #9bc6c0;
}

.time-point strong {
  color: #263b43;
  font-size: 13px;
}

.time-point small {
  color: var(--muted);
  font-size: 11px;
}

.notebooklm-card {
  background: #f0f8f6;
  border-color: #a8d2cb;
}

.notebooklm-inline-link {
  margin-top: 12px;
  padding: 8px 12px;
  border: 1px solid var(--teal);
  border-radius: 8px;
  background: #fff;
  text-decoration: none;
}

.notebooklm-inline-link:hover {
  background: var(--teal-soft);
  text-decoration: none;
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin-top: 24px;
}

.metric-card {
  min-height: 130px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcfb;
}

.metric-label {
  color: var(--muted);
  font-size: 13px;
}

.metric-value {
  margin: 10px 0 4px;
  font-size: clamp(26px, 3vw, 42px);
  line-height: 1;
  font-weight: 800;
}

.metric-note {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
}

.search-results {
  margin-top: 18px;
}

.result-overview,
.result-header,
.result-group {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcfb;
}

.result-overview {
  padding: 14px 16px;
}

.result-overview span,
.result-header span,
.result-group span {
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}

.result-overview strong,
.result-header strong,
.result-group strong {
  display: block;
  color: #213840;
  font-size: 18px;
}

.result-overview p {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.result-header {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  padding: 12px 14px;
}

.result-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 10px;
  margin-top: 10px;
}

.result-group {
  display: grid;
  gap: 10px;
  padding: 12px;
}

.result-group p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.result-links {
  display: grid;
  gap: 6px;
}

.result-links a {
  display: grid;
  gap: 2px;
  min-height: 42px;
  padding: 7px 8px;
  border-radius: 8px;
  color: #263b43;
  background: #fff;
}

.result-links a:hover {
  background: var(--teal-soft);
  text-decoration: none;
}

.result-links small {
  color: var(--muted);
  font-size: 11px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.reading-frame {
  margin-top: 22px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.reading-frame h3,
.content-band h3 {
  margin: 0 0 14px;
  font-size: 20px;
}

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

.reading-grid article,
.insight,
.space-card,
.case-card,
.prompt-card,
.source-item {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.reading-grid article {
  padding: 16px;
}

.step-num {
  display: inline-grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: #edf4f2;
  color: var(--teal);
  font-weight: 800;
}

.reading-grid h4 {
  margin: 12px 0 6px;
}

.reading-grid p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.content-band {
  margin: 22px clamp(18px, 3vw, 42px);
  padding: clamp(18px, 3vw, 34px);
}

.content-band.alt {
  background: #fbfcfb;
}

.section-heading {
  margin-bottom: 22px;
}

.inline-heading {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 18px;
}

.split-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(420px, 1.1fr);
  gap: 20px;
}

.split-layout > * {
  min-width: 0;
}

.insight-list {
  display: grid;
  gap: 12px;
}

.insight {
  padding: 16px;
  border-left: 4px solid var(--teal);
}

.insight h4 {
  margin: 0 0 6px;
}

.insight p {
  margin: 0;
  color: var(--muted);
}

.data-table-wrap {
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

th,
td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  white-space: nowrap;
}

th {
  background: #edf4f2;
  color: #27444a;
  font-size: 13px;
}

.bar-cell {
  min-width: 140px;
}

.bar-track {
  height: 8px;
  border-radius: 999px;
  background: #e8edf0;
  overflow: hidden;
}

.bar-fill {
  height: 100%;
  border-radius: 999px;
  background: var(--coral);
}

.card-grid,
.case-grid,
.prompt-grid,
.ssd-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.case-scroll-frame {
  height: clamp(300px, 34vh, 420px);
  overflow-y: scroll;
  overscroll-behavior: contain;
  scrollbar-gutter: stable;
  padding: 4px 8px 4px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.fieldwork-form {
  display: grid;
  gap: 18px;
}

.static-decision-panel {
  max-width: 760px;
}

.static-decision-list {
  margin: 12px 0 0;
  padding-left: 1.35rem;
  color: var(--ink);
  line-height: 1.8;
}

.fieldwork-fields {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.fieldwork-fields label {
  display: grid;
  gap: 6px;
  color: #31424b;
  font-size: 13px;
  font-weight: 700;
}

.fieldwork-fields .fieldwork-name-field {
  grid-column: span 2;
}

.fieldwork-fields input,
.fieldwork-fields select {
  width: 100%;
  min-height: 44px;
  padding: 9px 10px;
  border: 1px solid #bfcbd3;
  border-radius: 8px;
  background: #fff;
  color: var(--ink);
}

.upload-dropzone {
  display: grid;
  place-items: center;
  gap: 10px;
  min-height: 190px;
  padding: 24px;
  border: 1px dashed #9db1ba;
  border-radius: 8px;
  background: #f8fbfa;
  text-align: center;
}

.upload-dropzone p,
.fieldwork-status {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.native-file-input {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
}

.custom-file-button,
.fieldwork-submit {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 9px 16px;
  border: 1px solid var(--teal);
  border-radius: 8px;
  background: var(--teal-soft);
  color: #0e5550;
  font-weight: 800;
  cursor: pointer;
}

.custom-file-button:hover,
.fieldwork-submit:hover {
  filter: brightness(0.98);
}

.native-file-input:focus-visible + .custom-file-button {
  outline: 3px solid rgba(31, 122, 114, 0.24);
  outline-offset: 3px;
}

.fieldwork-submit {
  justify-self: start;
  background: var(--teal);
  color: #fff;
}

.fieldwork-submit:disabled {
  cursor: wait;
  opacity: 0.65;
}

.observation-library {
  display: grid;
  gap: 18px;
  margin-top: 34px;
  padding-top: 28px;
  border-top: 1px solid var(--line);
}

.observation-library-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
}

.observation-library-heading h3 {
  margin: 2px 0 0;
  font-size: 24px;
}

.observation-filters {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr)) auto;
  gap: 10px;
  align-items: end;
}

.observation-filters label {
  display: grid;
  gap: 6px;
  color: #31424b;
  font-size: 13px;
  font-weight: 700;
}

.observation-filters input,
.observation-filters select {
  width: 100%;
  min-height: 42px;
  padding: 8px 10px;
  border: 1px solid #bfcbd3;
  border-radius: 8px;
  background: #fff;
  color: var(--ink);
}

.observation-clear-button {
  min-height: 42px;
  padding: 8px 12px;
  border: 1px solid #bfcbd3;
  border-radius: 8px;
  background: #fff;
  color: #34434b;
  cursor: pointer;
  font-weight: 700;
}

.observation-clear-button:hover {
  border-color: var(--teal);
  color: var(--teal);
}

.observation-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.observation-card {
  min-width: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.observation-card.is-starred {
  border-color: #d5a43d;
}

.observation-preview-trigger {
  display: grid;
  width: 100%;
  aspect-ratio: 4 / 3;
  place-items: center;
  overflow: hidden;
  border: 0;
  border-bottom: 1px solid var(--line);
  background: #e9efef;
  color: #3f555d;
  cursor: pointer;
}

.observation-preview-trigger img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.observation-preview-trigger:hover img {
  filter: brightness(0.96);
}

.observation-file-badge {
  display: grid;
  min-width: 74px;
  min-height: 52px;
  place-items: center;
  border: 1px solid #aebfc5;
  border-radius: 8px;
  background: #fff;
  font-size: 14px;
  font-weight: 800;
}

.observation-card-body {
  display: grid;
  gap: 10px;
  padding: 14px;
}

.observation-card-title-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 36px;
  gap: 8px;
  align-items: start;
}

.observation-card h4 {
  min-width: 0;
  margin: 0;
  color: #203842;
  font-size: 16px;
  line-height: 1.45;
  overflow-wrap: anywhere;
}

.observation-icon-button {
  display: grid;
  width: 36px;
  height: 36px;
  place-items: center;
  border: 1px solid #c5d1d6;
  border-radius: 8px;
  background: #fff;
  color: #53656d;
  cursor: pointer;
  font-size: 20px;
  line-height: 1;
}

.observation-icon-button:hover,
.observation-icon-button.active {
  border-color: #d5a43d;
  color: #9b6b08;
  background: #fff9e8;
}

.observation-meta,
.observation-filename {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.55;
  overflow-wrap: anywhere;
}

.observation-filename span {
  color: #42535b;
  font-weight: 700;
}

.observation-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding-top: 2px;
}

.observation-actions button {
  min-height: 34px;
  padding: 6px 9px;
  border: 1px solid #c5d1d6;
  border-radius: 8px;
  background: #fff;
  color: #34434b;
  cursor: pointer;
  font-size: 12px;
  font-weight: 700;
}

.observation-actions button:hover {
  border-color: var(--teal);
  color: var(--teal);
}

.observation-actions button.danger:hover {
  border-color: #b5534f;
  color: #9a3733;
}

.observation-preview-dialog {
  width: min(1000px, calc(100vw - 32px));
  max-width: none;
  height: min(780px, calc(100vh - 32px));
  max-height: none;
  padding: 0;
  border: 1px solid #aebfc5;
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 24px 70px rgba(24, 42, 49, 0.3);
}

.observation-preview-dialog::backdrop {
  background: rgba(19, 34, 40, 0.64);
}

.observation-preview-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 36px;
  gap: 12px;
  align-items: center;
  min-height: 62px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--line);
  background: #f6faf9;
}

.observation-preview-head h2 {
  margin: 0;
  font-size: 18px;
  overflow-wrap: anywhere;
}

.observation-preview-body {
  display: grid;
  height: calc(100% - 62px);
  place-items: center;
  overflow: auto;
  padding: 16px;
  background: #e9efef;
}

.observation-preview-body img,
.observation-preview-body video {
  display: block;
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}

.observation-preview-body iframe {
  width: 100%;
  height: 100%;
  border: 0;
  background: #fff;
}

.space-card,
.case-card,
.prompt-card,
.ssd-card,
.source-item {
  padding: 16px;
}

.space-card h3,
.case-card h3,
.prompt-card h3,
.ssd-card h3,
.source-item h3 {
  margin: 0 0 8px;
  font-size: 18px;
}

.space-card p,
.case-card p,
.prompt-card p,
.ssd-card p,
.source-item p {
  color: var(--muted);
}

.result-note {
  margin: -10px 0 14px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.ssd-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.ssd-card {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 12px;
  min-height: 176px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.ssd-no {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border-radius: 8px;
  background: var(--teal-soft);
  color: var(--teal);
  font-weight: 800;
}

.chapter-select {
  display: grid;
  gap: 6px;
  min-width: min(320px, 100%);
  color: #31424b;
  font-size: 13px;
  font-weight: 700;
}

.chapter-select select {
  min-height: 40px;
  padding: 8px 10px;
  border: 1px solid #bfcbd3;
  border-radius: 8px;
  background: #fff;
  color: var(--ink);
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 12px 0;
}

.tag {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  padding: 2px 7px;
  border-radius: 999px;
  background: #eef2f3;
  color: #43525a;
  font-size: 12px;
}

.source-link {
  display: inline-flex;
  min-height: 34px;
  align-items: center;
  margin-top: 8px;
  padding: 6px 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--teal);
  font-weight: 700;
}

.case-meta,
.source-location {
  margin: 8px 0 0;
  color: #687782;
  font-size: 12px;
}

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

.segment {
  padding: 6px 12px;
}

.prompt-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.prompt-text {
  min-height: 128px;
  padding: 12px;
  border: 1px dashed #c5d1d6;
  border-radius: 8px;
  background: #fbfcfb;
  color: #33434b;
  font-size: 14px;
}

.copy-button {
  align-self: flex-start;
  padding: 7px 12px;
  font-weight: 700;
}

.source-open {
  color: #34434b;
  text-decoration: none;
}

.copy-button:hover {
  border-color: var(--teal);
  background: var(--teal-soft);
}

.source-count {
  min-width: 96px;
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  text-align: center;
  font-weight: 800;
}

.source-list {
  display: grid;
  gap: 10px;
}

.source-scroll-frame {
  height: clamp(320px, 42vh, 520px);
  overflow-y: scroll;
  overscroll-behavior: contain;
  scrollbar-gutter: stable;
  padding: 4px 8px 4px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.source-item {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr) auto;
  gap: 14px;
  align-items: start;
}

.source-type {
  display: inline-flex;
  width: max-content;
  min-height: 28px;
  align-items: center;
  padding: 3px 8px;
  border-radius: 999px;
  background: #eef2f3;
  color: #384952;
  font-size: 12px;
  font-weight: 700;
}

.source-path {
  margin: 8px 0 0;
  color: #687782;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 12px;
  overflow-wrap: anywhere;
}

.empty-state {
  grid-column: 1 / -1;
  padding: 24px;
  border: 1px dashed #bfcbd3;
  border-radius: 8px;
  color: var(--muted);
  text-align: center;
}

.site-footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  padding: 28px clamp(18px, 3vw, 42px) 36px;
  color: var(--muted);
  font-size: 13px;
}

.site-footer p {
  margin: 0;
}

.ai-chat {
  position: fixed;
  right: clamp(16px, 3vw, 34px);
  bottom: clamp(16px, 3vw, 30px);
  z-index: 30;
}

.notebooklm-launch {
  position: fixed;
  right: clamp(16px, 3vw, 34px);
  bottom: clamp(16px, 3vw, 30px);
  z-index: 30;
  display: grid;
  grid-template-columns: 1fr auto;
  column-gap: 12px;
  align-items: center;
  min-width: 190px;
  padding: 11px 14px;
  border: 1px solid rgba(31, 122, 114, 0.42);
  border-radius: 8px;
  background: #17645e;
  color: #fff;
  box-shadow: 0 16px 38px rgba(22, 57, 64, 0.22);
  text-decoration: none;
}

.notebooklm-launch:hover {
  background: #0f5550;
  text-decoration: none;
}

.notebooklm-launch-kicker {
  grid-column: 1 / -1;
  color: #bce2dc;
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.notebooklm-launch-label {
  font-size: 15px;
  font-weight: 800;
}

.notebooklm-launch-arrow {
  grid-column: 2;
  grid-row: 2;
  font-size: 22px;
  line-height: 1;
}

.ai-chat-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 108px;
  min-height: 46px;
  padding: 10px 16px;
  border: 1px solid rgba(31, 122, 114, 0.42);
  border-radius: 8px;
  background: #17645e;
  color: #fff;
  box-shadow: 0 16px 38px rgba(22, 57, 64, 0.22);
  cursor: pointer;
  font-weight: 800;
}

.ai-chat-toggle:hover {
  background: #0f5550;
}

.ai-chat.open .ai-chat-toggle {
  display: none;
}

.ai-chat-panel {
  position: relative;
  width: min(var(--ai-chat-width, 560px), calc(100vw - 32px));
  height: min(var(--ai-chat-height, 720px), calc(100vh - 48px));
  min-width: min(360px, calc(100vw - 32px));
  min-height: min(420px, calc(100vh - 48px));
  display: grid;
  grid-template-rows: auto auto minmax(0, 1fr) auto auto;
  border: 1px solid #b8c8cf;
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 24px 64px rgba(28, 43, 51, 0.24);
  overflow: hidden;
}

.ai-chat-panel[hidden] {
  display: none;
}

.ai-chat-resize {
  position: absolute;
  top: 8px;
  left: 8px;
  z-index: 2;
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border: 0;
  border-radius: 8px;
  background: transparent;
  cursor: nwse-resize;
}

.ai-chat-resize::before {
  content: "";
  display: block;
  width: 14px;
  height: 14px;
  border-top: 2px solid #8fa4ac;
  border-left: 2px solid #8fa4ac;
}

.ai-chat-resize:hover {
  background: #edf4f2;
}

.ai-chat-resize:hover::before {
  border-color: var(--teal);
}

body.ai-chat-resizing {
  cursor: nwse-resize;
  user-select: none;
}

.ai-chat-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 16px 12px 38px;
  border-bottom: 1px solid var(--line);
  background: #f6faf9;
}

.ai-chat-head h2 {
  margin: 0;
  color: #203842;
  font-size: 20px;
  line-height: 1.1;
}

.ai-chat-close {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: #37474f;
  cursor: pointer;
  font-size: 22px;
  line-height: 1;
}

.ai-chat-close:hover {
  border-color: var(--teal);
  background: var(--teal-soft);
}

.ai-chat-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 16px;
  border-bottom: 1px solid var(--line);
}

.ai-chat-controls label {
  color: #41525b;
  font-size: 13px;
  font-weight: 700;
}

.ai-chat-controls select {
  min-height: 34px;
  padding: 6px 9px;
  border: 1px solid #bfcbd3;
  border-radius: 8px;
  background: #fff;
  color: var(--ink);
}

.ai-chat-messages {
  display: grid;
  align-content: start;
  gap: 10px;
  padding: 14px 16px;
  overflow-y: auto;
  background: #fbfcfb;
}

.ai-message {
  display: grid;
  gap: 8px;
  max-width: 92%;
}

.ai-message.user {
  justify-self: end;
}

.ai-message.assistant {
  justify-self: start;
}

.ai-message-bubble {
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: #2d3c43;
  font-size: 14px;
  line-height: 1.65;
  white-space: pre-wrap;
}

.ai-message.user .ai-message-bubble {
  border-color: rgba(31, 122, 114, 0.32);
  background: #dcefed;
}

.ai-sources {
  display: grid;
  gap: 6px;
}

.ai-source-link {
  display: block;
  padding: 8px 9px;
  border: 1px solid #dce4e8;
  border-radius: 8px;
  background: #fff;
  color: #34434b;
  font-size: 12px;
}

.ai-source-link:hover {
  border-color: var(--teal);
  background: #f3faf8;
  text-decoration: none;
}

.ai-source-link strong {
  display: block;
  color: #203842;
  font-size: 12px;
}

.ai-source-link span {
  display: block;
  color: var(--muted);
  overflow-wrap: anywhere;
}

.ai-chat-form {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 8px;
  padding: 12px 16px;
  border-top: 1px solid var(--line);
  background: #fff;
}

.ai-chat-form textarea {
  min-height: 72px;
  max-height: 150px;
  resize: vertical;
  padding: 10px 11px;
  border: 1px solid #bfcbd3;
  border-radius: 8px;
  color: var(--ink);
}

.ai-chat-form textarea:focus {
  outline: 3px solid rgba(31, 122, 114, 0.18);
  border-color: var(--teal);
}

.ai-chat-form button {
  align-self: end;
  min-height: 42px;
  padding: 8px 13px;
  border: 1px solid var(--teal);
  border-radius: 8px;
  background: var(--teal);
  color: #fff;
  cursor: pointer;
  font-weight: 800;
}

.ai-chat-form button:disabled,
.ai-chat-form textarea:disabled {
  cursor: wait;
  opacity: 0.62;
}

.ai-chat-status {
  min-height: 30px;
  margin: 0;
  padding: 0 16px 12px;
  color: var(--muted);
  font-size: 12px;
}

@media (max-width: 1100px) {
  .workspace,
  .intro-layout,
  .split-layout {
    grid-template-columns: 1fr;
  }

  .control-panel {
    position: static;
  }

  .metric-grid,
  .visual-grid,
  .card-grid,
  .case-grid,
  .prompt-grid,
  .ssd-grid,
  .reading-grid,
  .result-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

@media (max-width: 720px) {
  .topbar {
    position: static;
    align-items: flex-start;
    flex-direction: column;
  }

  .topnav {
    justify-content: flex-start;
  }

  .topbar-actions {
    justify-items: start;
  }

  .fieldwork-fields {
    grid-template-columns: 1fr;
  }

  .fieldwork-fields .fieldwork-name-field {
    grid-column: auto;
  }

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

  .observation-filters,
  .observation-grid {
    grid-template-columns: 1fr;
  }

  .observation-preview-dialog {
    width: calc(100vw - 16px);
    height: calc(100vh - 16px);
  }

  .metric-grid,
  .visual-grid,
  .card-grid,
  .case-grid,
  .prompt-grid,
  .ssd-grid,
  .reading-grid,
  .result-grid {
    grid-template-columns: 1fr;
  }

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

  .source-item {
    grid-template-columns: 1fr;
  }

  .ai-chat {
    right: 12px;
    bottom: 12px;
  }

  .notebooklm-launch {
    right: 12px;
    bottom: 12px;
    min-width: 176px;
  }

  .visual-card-wide {
    grid-column: auto;
  }

  .visual-card-heading {
    flex-direction: column;
  }

  .map-frame-wrap {
    aspect-ratio: 4 / 3;
    min-height: 220px;
  }

  .time-track {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .time-track::before {
    top: 18px;
    right: auto;
    bottom: 18px;
    left: 17px;
    width: 2px;
    height: auto;
  }

  .time-point {
    grid-template-columns: 36px minmax(0, 1fr);
    justify-items: start;
    column-gap: 10px;
    text-align: left;
  }

  .time-point strong,
  .time-point small {
    grid-column: 2;
  }

  .time-point strong {
    align-self: end;
  }

  .time-point small {
    align-self: start;
  }

  .ai-chat-panel {
    width: calc(100vw - 24px);
    height: min(620px, calc(100vh - 24px));
    min-width: 0;
  }

  .ai-chat-resize {
    display: none;
  }

  .ai-chat-head {
    padding-left: 16px;
  }

  .ai-chat-form {
    grid-template-columns: 1fr;
  }

  .ai-chat-form button {
    width: 100%;
  }
}