:root {
  --primary-color: #4A90E2;
  --border-color: #E0E0E0;
  --text-color: #333333;
  --muted-color: #666666;
  --bg-color: #FFFFFF;
  --control-bg: #F7F7F7;
  --error-bg: #FFF3F3;
  --error-color: #9B1C1C;
  --shadow-color: rgba(0, 0, 0, 0.05);
  --radius: 6px;
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  padding: 20px;
  font-family: "Helvetica Neue", Arial, sans-serif;
  color: var(--text-color);
  background: var(--bg-color);
}

#main {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
}

#blog-title {
  display: none;
}

.page-header {
  margin-bottom: 16px;
}

.page-header h1 {
  display: flex;
  gap: 10px;
  align-items: center;
  margin: 0;
  padding-bottom: 10px;
  font-size: 1.85rem;
  line-height: 1.3;
  border-bottom: 1px solid var(--border-color);
}

.page-header h1::before {
  content: "";
  width: 5px;
  height: 1.35em;
  flex: 0 0 auto;
  background: var(--primary-color);
  border-radius: 999px;
}

.viewer {
  margin-bottom: 28px;
}

#modeSwitch {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 12px;
}

.mode-option {
  position: relative;
  display: flex;
  align-items: center;
  background: var(--control-bg);
  padding: 7px 20px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 14px;
  font-weight: bold;
  transition: background 0.2s, color 0.2s, border-color 0.2s;
}

.mode-option input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.mode-option input:checked + span {
  color: var(--primary-color);
}

.mode-option input:focus-visible + span {
  outline: 2px solid var(--primary-color);
  outline-offset: 3px;
}

.mode-option.active {
  background: var(--primary-color);
  color: #FFFFFF;
  border-color: var(--primary-color);
}

.mode-option.active input:checked + span {
  color: #FFFFFF;
}

#controls {
  display: block;
  min-height: 54px;
  margin-bottom: 10px;
  padding: 14px;
  background: var(--control-bg);
  border-radius: var(--radius);
  box-shadow: 0 2px 4px var(--shadow-color);
}

.control-layout {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 14px 16px;
  align-items: stretch;
}

.control-panel {
  min-width: 0;
  padding: 0 14px 0 0;
  border-right: 1px solid var(--border-color);
}

.control-panel:last-child {
  padding-right: 0;
  border-right: 0;
}

.control-panel-primary {
  grid-column: span 5;
}

.control-panel-secondary {
  grid-column: span 5;
}

.control-panel-compact {
  grid-column: span 3;
}

.control-panel-output {
  grid-column: span 2;
}

.control-layout-scatter .control-panel-primary {
  grid-column: span 4;
}

.control-layout-scatter .control-panel-secondary {
  grid-column: span 3;
}

.control-layout-line .control-panel-primary {
  grid-column: span 4;
}

.control-layout-line .control-panel-secondary {
  grid-column: span 6;
}

.control-layout-map .control-panel-primary {
  grid-column: span 9;
}

.control-layout-map .control-panel-output {
  grid-column: span 3;
}

.control-panel-title {
  display: flex;
  align-items: center;
  min-height: 22px;
  margin: 0 0 10px;
  padding-bottom: 6px;
  color: var(--muted-color);
  font-size: 12px;
  font-weight: 700;
  border-bottom: 1px solid var(--border-color);
}

.control-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  align-items: end;
}

.control-field {
  display: grid;
  grid-template-columns: 76px minmax(0, 1fr);
  gap: 5px;
  align-items: center;
  margin-bottom: 10px;
}

.control-row .control-field {
  grid-template-columns: 70px minmax(0, 1fr);
  margin-bottom: 0;
}

.bar-year-field {
  margin-top: 18px;
}

label {
  display: flex;
  align-items: center;
  font-size: 14px;
  color: var(--muted-color);
}

select,
input[type="range"],
input[type="number"],
button {
  display: flex;
  align-items: center;
  padding: 6px 8px;
  font-size: 14px;
  color: var(--text-color);
  background: var(--bg-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  outline: none;
  transition: border-color 0.2s, background-color 0.2s;
}

.metric-select {
  width: 100%;
}

.year-control {
  display: flex;
  gap: 10px;
  align-items: center;
  min-width: 0;
}

button {
  color: #FFFFFF;
  background-color: var(--primary-color);
  border: none;
  cursor: pointer;
}

button:hover {
  filter: brightness(0.96);
}

button:disabled {
  cursor: default;
  opacity: 0.7;
}

.secondary-button {
  color: var(--text-color);
  background-color: var(--bg-color);
  border: 1px solid var(--border-color);
}

select:focus,
input[type="range"]:focus,
input[type="number"]:focus,
button:focus,
input[type="search"]:focus {
  border-color: var(--primary-color);
}

input[type="checkbox"] {
  width: 16px;
  height: 16px;
  margin: 0;
  accent-color: var(--primary-color);
}

input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  min-width: 110px;
  height: 18px;
  padding: 0;
  background: transparent;
  border: 0;
}

input[type="range"]::-webkit-slider-runnable-track {
  height: 4px;
  background: var(--border-color);
  border-radius: 999px;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  margin-top: -6px;
  background: var(--primary-color);
  border: 2px solid #FFFFFF;
  border-radius: 50%;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.22);
}

input[type="range"]::-moz-range-track {
  height: 4px;
  background: var(--border-color);
  border-radius: 999px;
}

input[type="range"]::-moz-range-progress {
  height: 4px;
  background: var(--border-color);
  border-radius: 999px;
}

input[type="range"]::-moz-range-thumb {
  width: 16px;
  height: 16px;
  background: var(--primary-color);
  border: 2px solid #FFFFFF;
  border-radius: 50%;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.22);
}

.inline-checkbox {
  gap: 6px;
  margin: 8px 0 10px;
  color: var(--text-color);
}

.control-actions {
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: stretch;
  margin-left: 0;
}

.control-actions-panel {
  display: grid;
  align-content: start;
  justify-items: stretch;
}

.share-status {
  min-height: 18px;
  margin: 8px 0 0;
  color: var(--muted-color);
  font-size: 12px;
  line-height: 1.5;
}

.share-status.error {
  color: var(--error-color);
}

#yearLabel {
  width: 52px;
  flex: 0 0 52px;
  font-weight: bold;
  text-align: center;
}

#corrDisplay {
  padding: 8px 10px;
  background: var(--bg-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  font-size: 14px;
}

.university-search {
  width: 100%;
  margin-bottom: 8px;
  padding: 6px 8px;
  color: var(--text-color);
  background: var(--bg-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  font-size: 14px;
  outline: none;
}

.picker-toolbar {
  display: flex;
  justify-content: flex-end;
  margin-bottom: 8px;
}

.university-checklist {
  display: grid;
  gap: 2px;
  max-height: 164px;
  overflow: auto;
  padding: 4px;
  background: var(--bg-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
}

.university-checklist-multi {
  max-height: 190px;
}

.checklist-option {
  display: flex;
  gap: 7px;
  align-items: center;
  min-height: 28px;
  padding: 4px 6px;
  border-radius: 4px;
  cursor: pointer;
}

.checklist-option:hover {
  background: var(--control-bg);
}

.checklist-empty {
  margin: 6px;
  color: var(--muted-color);
  font-size: 13px;
}

.selection-summary {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  min-height: 24px;
  margin-top: 8px;
  color: var(--muted-color);
  font-size: 13px;
}

.selection-chip {
  display: inline-flex;
  align-items: center;
  max-width: 100%;
  padding: 3px 7px;
  color: var(--text-color);
  background: #FFFFFF;
  border: 1px solid var(--border-color);
  border-radius: 999px;
  line-height: 1.35;
}

.status-message {
  width: 100%;
  margin: 0;
  color: var(--muted-color);
  font-size: 14px;
}

.status-message.error {
  padding: 10px 12px;
  color: var(--error-color);
  background: var(--error-bg);
  border: 1px solid rgba(155, 28, 28, 0.18);
  border-radius: var(--radius);
}

#chart-container {
  position: relative;
  height: 600px;
  padding: 20px;
  background: var(--bg-color);
  border-radius: var(--radius);
  box-shadow: 0 2px 8px var(--shadow-color);
}

#chart-container.map-active {
  height: 880px;
}

#chart {
  width: 100% !important;
  height: 100% !important;
}

.map-container {
  position: relative;
  height: 100%;
  min-height: 0;
}

.map-view {
  position: relative;
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto auto;
  gap: 8px;
  height: 100%;
  min-height: 0;
}

.map-view-empty {
  display: grid;
  place-items: center;
}

.map-title-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 12px;
  align-items: baseline;
  min-width: 0;
  line-height: 1.35;
}

.map-title-row strong {
  color: #222222;
  font-size: 16px;
}

.map-title-row span {
  color: var(--muted-color);
  font-size: 12px;
}

.map-stage {
  position: relative;
  min-height: 0;
}

.japan-map-svg {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 0;
}

.lincun-map-svg {
  background: #FFFFFF;
  border: 1px solid rgba(80, 96, 104, 0.12);
  border-radius: var(--radius);
}

.map-prefecture {
  cursor: default;
  outline: none;
  transition: opacity 0.18s;
}

.map-prefecture:focus-visible .map-prefecture-shape,
.map-prefecture:hover .map-prefecture-shape {
  stroke: #222222;
  stroke-width: 3;
  fill-opacity: 1;
}

.map-summary {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  color: var(--muted-color);
  font-size: 13px;
  line-height: 1.4;
}

.map-summary span {
  display: inline-flex;
  gap: 4px;
  align-items: baseline;
  min-height: 24px;
  padding: 3px 7px;
  background: var(--control-bg);
  border: 1px solid var(--border-color);
  border-radius: 999px;
}

.map-summary strong {
  color: var(--text-color);
}

.map-ranking {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.map-ranking li {
  display: flex;
  gap: 6px;
  align-items: center;
  justify-content: space-between;
  min-width: 0;
  padding: 6px 8px;
  background: #FFFFFF;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  font-size: 12px;
  line-height: 1.35;
}

.map-ranking span {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.map-ranking strong {
  flex: 0 0 auto;
  color: var(--primary-color);
}

.map-source {
  margin: 0;
  color: var(--muted-color);
  font-size: 11px;
  line-height: 1.35;
}

.map-tooltip {
  position: absolute;
  z-index: 5;
  display: grid;
  gap: 3px;
  min-width: 150px;
  max-width: min(260px, calc(100% - 24px));
  padding: 9px 10px;
  color: #FFFFFF;
  background: rgba(35, 42, 48, 0.94);
  border-radius: var(--radius);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.18);
  font-size: 12px;
  line-height: 1.35;
  pointer-events: none;
}

.map-tooltip strong,
.map-tooltip b {
  font-size: 14px;
}

.map-tooltip span {
  color: rgba(255, 255, 255, 0.78);
}

.visualization-status {
  display: grid;
  place-items: center;
  height: 100%;
  padding: 18px;
  color: var(--muted-color);
  background: var(--control-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  font-size: 14px;
  line-height: 1.7;
  text-align: center;
}

.content-section {
  margin-top: 28px;
  line-height: 1.7;
}

.content-section h2 {
  display: flex;
  gap: 8px;
  align-items: center;
  margin: 0 0 12px;
  padding-bottom: 6px;
  font-size: 1.35rem;
  line-height: 1.35;
  border-bottom: 1px solid var(--border-color);
}

.content-section h2::before {
  content: "";
  width: 4px;
  height: 1.15em;
  flex: 0 0 auto;
  background: var(--primary-color);
  border-radius: 999px;
}

.content-section h3,
.content-section h4 {
  margin: 20px 0 8px;
  line-height: 1.45;
}

.content-section h3 {
  padding-left: 10px;
  font-size: 1.08rem;
  border-left: 3px solid rgba(74, 144, 226, 0.72);
}

.content-section h4 {
  padding-left: 8px;
  color: var(--text-color);
  font-size: 1rem;
  border-left: 2px solid var(--border-color);
}

.content-section p {
  margin: 8px 0;
}

.content-section ul {
  margin-top: 8px;
  padding-left: 1.4em;
}

.reference-list {
  margin-top: 8px;
}

.reference-list li {
  margin: 4px 0;
}

.reference-list a {
  color: var(--primary-color);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

@media (max-width: 1100px) {
  .control-panel-primary,
  .control-layout-scatter .control-panel-primary,
  .control-layout-line .control-panel-primary,
  .control-layout-map .control-panel-primary {
    grid-column: span 7;
  }

  .control-panel-secondary,
  .control-layout-scatter .control-panel-secondary,
  .control-layout-line .control-panel-secondary {
    grid-column: span 5;
    padding-right: 0;
    border-right: 0;
  }

  .control-panel-compact {
    grid-column: span 7;
  }

  .control-panel-output {
    grid-column: span 5;
    padding-right: 0;
    border-right: 0;
  }

  .control-actions {
    flex-direction: row;
    flex-wrap: wrap;
  }
}

@media (max-width: 720px) {
  body {
    padding: 12px;
  }

  .page-header h1 {
    font-size: 1.45rem;
  }

  .mode-option {
    width: 100%;
    justify-content: center;
  }

  #controls {
    padding: 10px;
  }

  .control-layout,
  .control-layout-scatter,
  .control-layout-line,
  .control-layout-map,
  .control-row {
    grid-template-columns: 1fr;
  }

  .control-panel,
  .control-panel-primary,
  .control-panel-secondary,
  .control-panel-compact,
  .control-panel-output,
  .control-layout-scatter .control-panel-primary,
  .control-layout-scatter .control-panel-secondary,
  .control-layout-line .control-panel-primary,
  .control-layout-line .control-panel-secondary,
  .control-layout-map .control-panel-primary,
  .control-layout-map .control-panel-output {
    grid-column: 1 / -1;
    padding-right: 0;
    padding-bottom: 12px;
    border-right: 0;
    border-bottom: 1px solid var(--border-color);
  }

  .control-panel:last-child {
    padding-bottom: 0;
    border-bottom: 0;
  }

  .control-field,
  .control-row .control-field {
    grid-template-columns: 1fr;
  }

  select,
  input[type="number"],
  input[type="search"] {
    width: 100%;
    max-width: 100%;
  }

  .inline-checkbox,
  #corrDisplay {
    margin-left: 0;
  }

  .control-actions {
    width: 100%;
    margin-left: 0;
  }

  .control-actions button {
    flex: 1;
    justify-content: center;
  }

  #chart-container {
    height: 520px;
    padding: 12px;
  }

  #chart-container.map-active {
    height: 760px;
  }

  .map-summary {
    gap: 5px;
    font-size: 12px;
  }

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