:root {
  --color-bg: #f5f7fb;
  --color-surface: #ffffff;
  --color-border: #d9dee8;
  --color-text: #1d2433;
  --color-muted: #667085;
  --color-primary: #2563eb;
  --color-primary-dark: #1d4ed8;
  --color-danger: #b42318;
  --color-danger-bg: #fff1f0;
  --color-chip-bg: #eef2f7;
  --shadow-panel: 0 1px 2px rgba(16, 24, 40, 0.06);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
}

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

.layout {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
}

.app-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: 28px 0;
}

.header-layout {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
}

.app-header h1 {
  margin: 0 0 8px;
  font-size: 28px;
}

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

.header-action-button {
  flex: 0 0 auto;
}

.main-layout {
  display: grid;
  gap: 20px;
  padding: 24px 0 48px;
}

.panel,
.result-section {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  box-shadow: var(--shadow-panel);
  padding: 20px;
}

.panel h2,
.result-section h2,
.result-section h3 {
  margin: 0 0 14px;
  line-height: 1.35;
}

.section-heading,
.result-heading,
.button-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.section-heading,
.result-heading {
  justify-content: space-between;
}

.collapsible-panel.is-collapsed {
  padding-bottom: 14px;
}

.collapsible-body {
  margin-top: 14px;
}

.collapsible-panel.is-collapsed .collapsible-body {
  display: none;
}

.collapse-toggle {
  border: 0;
  background: transparent;
  color: var(--color-text);
  cursor: pointer;
  font-size: 20px;
  font-weight: 800;
  padding: 0;
  text-align: left;
}

.persistent-actions {
  justify-content: flex-end;
}

.button {
  min-height: 40px;
  border: 1px solid transparent;
  border-radius: 6px;
  padding: 8px 14px;
  cursor: pointer;
  font-weight: 600;
}

.button:disabled {
  cursor: not-allowed;
  opacity: 0.5;
}

.button-primary {
  background: var(--color-primary);
  color: #ffffff;
}

.button-primary:hover:not(:disabled) {
  background: var(--color-primary-dark);
}

.button-secondary {
  background: #ffffff;
  border-color: var(--color-border);
  color: var(--color-text);
}

.button-secondary:hover:not(:disabled) {
  background: #f8fafc;
}

.button-small {
  min-height: 34px;
  padding: 6px 10px;
}

.input-grid {
  display: grid;
  grid-template-columns: minmax(260px, 1fr) minmax(320px, auto);
  gap: 16px;
  align-items: end;
  margin-bottom: 16px;
}

.field-group {
  display: grid;
  gap: 8px;
}

.field-label {
  font-weight: 700;
}

.textarea {
  width: 100%;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  background: #ffffff;
  color: var(--color-text);
  padding: 12px;
  resize: vertical;
}

.textarea:focus,
.file-input:focus,
.select:focus {
  border-color: var(--color-primary);
  outline: 2px solid rgba(37, 99, 235, 0.16);
}

.prompt-area {
  min-height: 280px;
  white-space: pre;
}

.json-area {
  min-height: 180px;
  font-family: Consolas, "Courier New", monospace;
}

.error-message {
  display: none;
  margin-top: 16px;
  border: 1px solid #f3b7b2;
  border-radius: 6px;
  background: var(--color-danger-bg);
  color: var(--color-danger);
  padding: 12px;
  font-weight: 700;
}

.status-message {
  display: none;
  margin-top: 16px;
  border: 1px solid #a6d8b3;
  border-radius: 6px;
  background: #f0fdf4;
  color: #166534;
  padding: 12px;
  font-weight: 700;
}

.status-message.is-visible {
  display: block;
}

.error-message.is-visible {
  display: block;
}

.result-area {
  display: grid;
  gap: 20px;
}

.empty-message {
  margin: 0;
  color: var(--color-muted);
  background: var(--color-surface);
  border: 1px dashed var(--color-border);
  border-radius: 8px;
  padding: 24px;
  text-align: center;
}

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

.summary-card {
  min-height: 96px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 14px;
  background: #fbfcfe;
}

.summary-label {
  margin: 0 0 6px;
  color: var(--color-muted);
  font-size: 13px;
}

.summary-value {
  margin: 0;
  font-size: 18px;
  font-weight: 800;
  overflow-wrap: anywhere;
}

.chart-wrap {
  position: relative;
  min-height: 380px;
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--color-border);
  border-radius: 8px;
}

.data-table {
  width: 100%;
  min-width: 920px;
  border-collapse: collapse;
  background: #ffffff;
}

.data-table th,
.data-table td {
  border-bottom: 1px solid var(--color-border);
  padding: 10px 12px;
  text-align: left;
  vertical-align: top;
}

.data-table th {
  background: #f8fafc;
  font-size: 13px;
  white-space: nowrap;
}

.data-table .name-cell {
  min-width: 160px;
  white-space: normal;
  overflow-wrap: anywhere;
}

.data-table .dropout-episode-cell {
  min-width: 110px;
  white-space: nowrap;
}

.data-table .overall-comment-cell {
  min-width: 360px;
  overflow-wrap: anywhere;
}

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

.reader-card-list,
.episode-card-list {
  display: none;
}

.reader-card,
.episode-card {
  border: 1px solid var(--color-border);
  border-radius: 8px;
  background: #ffffff;
  padding: 12px;
}

.reader-card-name {
  margin: 0;
  font-size: 16px;
  line-height: 1.4;
  overflow-wrap: anywhere;
}

.reader-card-meta {
  margin: 8px 0 0;
}

.reader-card-label {
  display: inline-block;
  min-width: 64px;
  color: var(--color-muted);
  font-weight: 800;
}

.reader-card-comment {
  margin-top: 10px;
  color: var(--color-text);
  overflow-wrap: anywhere;
}

.reader-card .button {
  margin-top: 12px;
}

.episode-card-label {
  margin: 0 0 4px;
  color: var(--color-muted);
  font-size: 13px;
  font-weight: 800;
}

.episode-card-title {
  margin: 0;
  font-size: 16px;
  line-height: 1.4;
  overflow-wrap: anywhere;
}

.episode-card-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  margin-top: 12px;
}

.episode-card-stat {
  border: 1px solid var(--color-border);
  border-radius: 6px;
  background: #fbfcfe;
  padding: 8px;
}

.episode-card-stat-label {
  margin: 0 0 2px;
  color: var(--color-muted);
  font-size: 12px;
  font-weight: 800;
}

.episode-card-stat-value {
  margin: 0;
  font-weight: 800;
}

.episode-card-summary {
  margin-top: 12px;
  overflow-wrap: anywhere;
}

.episode-card .button {
  margin-top: 12px;
}

.modal-review-card-list {
  display: none;
}

.modal-review-card {
  border: 1px solid var(--color-border);
  border-radius: 8px;
  background: #ffffff;
  padding: 12px;
}

.modal-review-label {
  margin: 0 0 4px;
  color: var(--color-muted);
  font-size: 13px;
  font-weight: 800;
}

.modal-review-title {
  margin: 0;
  font-size: 16px;
  line-height: 1.4;
  overflow-wrap: anywhere;
}

.modal-review-meta-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
  margin-top: 12px;
}

.modal-review-comment {
  margin-top: 12px;
  overflow-wrap: anywhere;
}

.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--color-border);
}

.tab-button {
  border: 0;
  border-bottom: 3px solid transparent;
  background: transparent;
  color: var(--color-muted);
  cursor: pointer;
  font-weight: 800;
  padding: 10px 14px;
}

.tab-button.is-active {
  border-bottom-color: var(--color-primary);
  color: var(--color-primary);
}

.tab-button:hover {
  color: var(--color-primary-dark);
}

.episode-title-cell {
  min-width: 180px;
}

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

.chip {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  background: var(--color-chip-bg);
  color: #344054;
  padding: 2px 8px;
  font-size: 12px;
  font-weight: 700;
}

.detail-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-bottom: 16px;
}

.detail-grid.is-single {
  grid-template-columns: 1fr;
}

.detail-item {
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 12px;
}

.detail-label {
  margin: 0 0 4px;
  color: var(--color-muted);
  font-size: 13px;
  font-weight: 700;
}

.detail-value {
  margin: 0;
  overflow-wrap: anywhere;
}

.reader-profile-detail {
  display: grid;
  gap: 22px;
}

.reader-profile-block {
  display: grid;
  gap: 6px;
}

.reader-profile-label {
  margin: 0;
  font-weight: 800;
}

.reader-profile-value {
  margin: 0;
  overflow-wrap: anywhere;
}

.multiline-text {
  line-height: 1.75;
}

.select {
  min-width: 260px;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  background: #ffffff;
  padding: 8px 10px;
}

.review-list {
  margin: 0;
  padding-left: 22px;
}

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

.modal {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 1000;
}

.modal.is-visible {
  display: block;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(15, 23, 42, 0.48);
}

.modal-dialog {
  position: relative;
  width: min(980px, calc(100% - 32px));
  max-height: calc(100vh - 48px);
  margin: 24px auto;
  overflow: hidden;
  border-radius: 8px;
  background: var(--color-surface);
  box-shadow: 0 20px 45px rgba(15, 23, 42, 0.24);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  border-bottom: 1px solid var(--color-border);
  padding: 16px 20px;
}

.modal-header h2 {
  margin: 0;
  font-size: 20px;
  overflow-wrap: anywhere;
}

.modal-actions {
  display: flex;
  align-items: center;
  flex: 0 0 auto;
  gap: 8px;
}

.modal-nav-button,
.modal-close-button {
  width: 38px;
  height: 38px;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  background: #ffffff;
  cursor: pointer;
  font-size: 24px;
  line-height: 1;
}

.modal-nav-button {
  font-size: 16px;
  font-weight: 800;
}

.modal-nav-button:disabled {
  cursor: not-allowed;
  opacity: 0.45;
}

.modal-body {
  max-height: calc(100vh - 130px);
  overflow: auto;
  padding: 20px;
}

.modal-body h3 {
  margin: 18px 0 12px;
}

body.modal-open {
  overflow: hidden;
}

@media (max-width: 900px) {
  .input-grid,
  .summary-grid,
  .detail-grid {
    grid-template-columns: 1fr;
  }

  .button-row {
    align-items: stretch;
  }

  .button-row .button {
    flex: 1 1 220px;
  }

  .persistent-actions {
    width: 100%;
  }
}

@media (max-width: 600px) {
  body {
    font-size: 16px;
    line-height: 1.75;
  }

  .layout {
    width: min(100% - 16px, 1180px);
  }

  .app-header {
    padding: 18px 0;
  }

  .app-header h1 {
    font-size: 22px;
  }

  .header-layout {
    display: grid;
    gap: 14px;
  }

  .app-header p {
    font-size: 15px;
  }

  .header-action-button {
    width: 100%;
  }

  .main-layout {
    gap: 14px;
    padding: 16px 0 32px;
  }

  .panel,
  .result-section {
    border-radius: 6px;
    padding: 14px;
  }

  .section-heading,
  .result-heading {
    display: grid;
    align-items: stretch;
    gap: 10px;
  }

  .section-heading .button,
  .result-heading .select {
    width: 100%;
  }

  .persistent-actions,
  .button-row {
    display: grid;
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .button {
    min-height: 44px;
    width: 100%;
    padding: 9px 12px;
  }

  .collapse-toggle {
    font-size: 19px;
    line-height: 1.4;
  }

  .field-label,
  .summary-label,
  .detail-label,
  .episode-card-label,
  .episode-card-stat-label {
    font-size: 14px;
  }

  .collapsible-body {
    margin-top: 12px;
  }

  .prompt-area {
    min-height: 220px;
    white-space: pre-wrap;
    overflow-wrap: anywhere;
  }

  .json-area {
    min-height: 220px;
  }

  .summary-grid {
    gap: 8px;
  }

  .summary-card {
    min-height: auto;
    padding: 12px;
  }

  .summary-value {
    font-size: 18px;
  }

  .chart-wrap {
    min-height: 300px;
    overflow-x: auto;
  }

  .table-wrap {
    margin-inline: -4px;
  }

  #reviewTabsSection .reader-card-list + .table-wrap,
  #reviewTabsSection .episode-card-list + .table-wrap {
    display: none;
  }

  .reader-card-list,
  .episode-card-list {
    display: grid;
    gap: 10px;
  }

  .modal-review-card-list {
    display: grid;
    gap: 10px;
  }

  .modal-review-card-list + .table-wrap {
    display: none;
  }

  .data-table {
    min-width: 760px;
    font-size: 15px;
  }

  .data-table th,
  .data-table td {
    padding: 8px 10px;
  }

  .data-table .name-cell {
    min-width: 120px;
  }

  .data-table .overall-comment-cell {
    min-width: 280px;
  }

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

  .tab-button {
    font-size: 16px;
    padding: 10px 8px;
    text-align: center;
  }

  .reader-card-name,
  .episode-card-title {
    font-size: 18px;
  }

  .reader-card,
  .episode-card,
  .modal-review-card,
  .reader-card-comment,
  .episode-card-summary,
  .modal-review-comment,
  .reader-profile-value,
  .detail-value,
  .review-list,
  .modal-body {
    font-size: 16px;
  }

  .chip {
    font-size: 13px;
    padding: 3px 9px;
  }

  .detail-grid {
    gap: 8px;
  }

  .detail-item {
    padding: 10px;
  }

  .reader-profile-detail {
    gap: 18px;
  }

  .review-list {
    padding-left: 18px;
  }

  .modal {
    inset: 0;
    width: 100vw;
    height: 100dvh;
  }

  .modal-backdrop {
    display: none;
  }

  .modal-dialog {
    width: 100%;
    height: 100dvh;
    max-height: 100dvh;
    min-height: 100dvh;
    margin: 0;
    border-radius: 0;
    box-shadow: none;
  }

  .modal-header {
    align-items: flex-start;
    padding: 12px;
  }

  .modal-header h2 {
    font-size: 19px;
  }

  .modal-actions {
    gap: 6px;
  }

  .modal-nav-button,
  .modal-close-button {
    width: 36px;
    height: 36px;
  }

  .modal-body {
    max-height: calc(100dvh - 61px);
    min-height: calc(100dvh - 61px);
    padding: 14px;
  }
}

@media (max-width: 380px) {
  .layout {
    width: min(100% - 12px, 1180px);
  }

  .panel,
  .result-section {
    padding: 12px;
  }

  .app-header h1 {
    font-size: 20px;
  }

  .button,
  .reader-card,
  .episode-card,
  .modal-body {
    font-size: 15px;
  }

  .data-table {
    min-width: 700px;
  }
}