:root {
  color-scheme: light;
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --bg: #f3f5f7;
  --panel: #ffffff;
  --panel-muted: #f7f8fa;
  --panel-subtle: #eef2f6;
  --border: #d6dde6;
  --border-strong: #bcc8d6;
  --text: #0f172a;
  --text-muted: #475569;
  --accent: #1d4ed8;
  --accent-strong: #1e3a8a;
  --accent-soft: #dbeafe;
  --danger: #b42318;
  --danger-soft: #fee4e2;
  --success: #067647;
  --success-soft: #dcfae6;
  --shadow-sm: none;
  --shadow-lg: 0 20px 48px rgba(15, 23, 42, 0.14);
  --radius: 10px;
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
}

main {
  max-width: 1400px;
  margin: 0 auto;
  padding: 16px 24px 32px;
}

.page-header {
  position: sticky;
  top: 12px;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 14px 18px;
  margin-bottom: 12px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-sm);
}

.page-header h1,
#scheme-modal-title {
  margin: 0;
}

.page-header h1 {
  font-size: 28px;
  line-height: 1;
  letter-spacing: -0.03em;
}

.actions,
.app-nav,
.modal-actions,
.preview-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.actions {
  flex-shrink: 0;
  justify-content: flex-end;
}

.app-nav {
  display: inline-flex;
  gap: 6px;
  padding: 3px;
  margin: 0 0 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #ffffff;
}

button,
input[type="file"],
textarea {
  font: inherit;
}

button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 0 14px;
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  background: var(--panel);
  color: var(--text);
  cursor: pointer;
  transition: border-color 180ms ease, background-color 180ms ease, color 180ms ease, box-shadow 180ms ease;
}

button:hover:not(:disabled) {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(3, 105, 161, 0.12);
}

button:focus-visible,
input[type="file"]:focus-visible,
textarea:focus-visible,
details summary:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

button:disabled {
  cursor: not-allowed;
  color: #94a3b8;
  background: #f8fafc;
  border-color: var(--border);
  box-shadow: none;
}

#generate-button,
.scene-tab.active,
.app-nav button[aria-current="page"] {
  background: var(--accent);
  border-color: var(--accent);
  color: #ffffff;
}

#generate-button:hover:not(:disabled) {
  background: var(--accent-strong);
  box-shadow: 0 0 0 3px rgba(3, 105, 161, 0.18);
}

#workbench-view,
#templates-view,
.workbench-grid,
#template-panel,
.template-editor-shell,
.editor-grid,
#preview-panel {
  display: grid;
  gap: 12px;
}

.panel {
  padding: 16px 18px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--panel);
}

.panel-heading,
.template-editor-header,
.preview-group summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.panel-heading {
  margin-bottom: 12px;
}

.panel h2,
.panel-heading h2,
.template-editor-header h3 {
  margin: 0;
  line-height: 1.2;
}

.panel-heading h2,
.template-editor-header h3 {
  font-size: 18px;
}

.panel label,
.template-group label,
.modal-label {
  display: block;
  margin-bottom: 8px;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
}

#file-input,
.template-group textarea,
#scheme-modal-text,
#scheme-modal-qr {
  border-radius: 8px;
}

#file-input {
  display: block;
  width: 100%;
  min-height: 48px;
  padding: 12px 14px;
  border: 1px dashed var(--border-strong);
  background: var(--panel-subtle);
  color: var(--text-muted);
}

.status-message,
.empty-state {
  margin: 12px 0 0;
  line-height: 1.55;
}

.status-message,
.empty-state,
.template-group,
.modal-card,
.preview-group {
  border: 1px solid var(--border);
}

.status-message {
  padding: 12px 14px;
  background: var(--panel-subtle);
  color: var(--text-muted);
}

.status-message.is-error {
  border-color: #f3c7c4;
  background: #fff6f5;
  color: var(--danger);
}

.status-message.is-success {
  border-color: #b7ebd0;
  background: #f0fdf4;
  color: var(--success);
}

.empty-state {
  padding: 16px;
  border-style: dashed;
  background: var(--panel-subtle);
  color: var(--text-muted);
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  margin: 0;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  background: #ffffff;
}

.summary-grid > div {
  min-height: 84px;
  padding: 12px 14px;
  border-right: 1px solid var(--border);
}

.summary-grid > div:last-child {
  border-right: 0;
}

.summary-grid dt {
  margin: 0 0 10px;
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
}

.summary-grid dd {
  margin: 0;
  font-size: 30px;
  line-height: 1;
  font-weight: 700;
}

#template-scene-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.scene-tab {
  width: auto;
  justify-content: flex-start;
  text-align: left;
  padding: 10px 12px;
  background: transparent;
}

.template-group,
.modal-card {
  padding: 14px 16px;
  background: #ffffff;
}

.template-group h4 {
  margin: 0 0 14px;
  font-size: 15px;
}

.template-group textarea {
  width: 100%;
  min-height: 96px;
  margin-bottom: 12px;
  padding: 10px 12px;
  border: 1px solid var(--border);
  background: var(--panel-muted);
  color: var(--text);
  resize: vertical;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  line-height: 1.5;
}

.template-group textarea:last-of-type {
  margin-bottom: 0;
}

.template-textarea--lg {
  min-height: 132px;
}

.preview-group {
  border-radius: 8px;
  overflow: hidden;
  background: #ffffff;
}

.preview-group summary {
  padding: 14px 16px;
  cursor: pointer;
  list-style: none;
  background: var(--panel-muted);
}

.preview-group[open] summary {
  border-bottom: 1px solid var(--border);
}

.preview-group summary::-webkit-details-marker {
  display: none;
}

.preview-group strong {
  font-size: 15px;
}

.preview-meta {
  gap: 10px;
  color: var(--text-muted);
  font-size: 13px;
}

.preview-table-wrap {
  overflow: auto;
}

.row-action {
  min-width: 84px;
  padding: 0 12px;
  background: transparent;
}

.error-badge,
.status-badge {
  display: inline-flex;
  align-items: center;
  min-height: 26px;
  padding: 0 10px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  white-space: nowrap;
}

.error-badge {
  background: var(--danger-soft);
  border-color: #f3c7c4;
  color: var(--danger);
}

.status-badge {
  background: var(--accent-soft);
  border-color: #bfdbfe;
  color: var(--accent);
}

.status-badge.success {
  background: var(--success-soft);
  border-color: #bbf7d0;
  color: var(--success);
}

#scheme-modal {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 20px;
  background: rgba(15, 23, 42, 0.56);
  z-index: 40;
}

#scheme-modal > .modal-shell {
  width: min(860px, 100%);
  padding: 22px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--panel);
  box-shadow: var(--shadow-lg);
}

.modal-header {
  margin-bottom: 18px;
}

#scheme-modal-title {
  font-size: 24px;
}

.modal-body {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) 260px;
  gap: 16px;
  align-items: start;
}

.modal-card {
  background: var(--panel-subtle);
}

#scheme-modal-text {
  min-height: 124px;
  margin: 0;
  padding: 14px;
  border: 1px solid var(--border);
  background: #ffffff;
  white-space: pre-wrap;
  word-break: break-all;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  line-height: 1.55;
}

#scheme-modal-qr {
  display: block;
  width: 220px;
  height: 220px;
  margin: 0 auto;
  border: 1px solid var(--border);
  background: #ffffff;
}

.modal-actions {
  justify-content: flex-end;
  margin-top: 18px;
}

table {
  width: 100%;
  min-width: 920px;
  border-collapse: collapse;
}

th,
td {
  padding: 10px 12px;
  border-bottom: 1px solid #e5e7eb;
  text-align: left;
  vertical-align: top;
  font-size: 13px;
  line-height: 1.5;
  word-break: break-all;
}

th {
  position: sticky;
  top: 0;
  background: #f8fafc;
  color: var(--text-muted);
  font-weight: 600;
}

tbody tr:hover {
  background: #f0f9ff;
}

tbody tr.row-error {
  background: #fff7f7;
}

tbody tr.row-error:hover {
  background: #ffefef;
}

@media (max-width: 960px) {
  main {
    padding: 16px 16px 32px;
  }

  .page-header {
    top: 12px;
    flex-direction: column;
    padding: 16px;
  }

  .actions,
  .app-nav {
    width: 100%;
  }

  .actions button,
  .app-nav button,
  .scene-tab {
    flex: 1 1 160px;
  }

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

  .summary-grid > div {
    border-right: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
  }

  .summary-grid > div:nth-child(2n) {
    border-right: 0;
  }

  .summary-grid > div:nth-last-child(-n + 2) {
    border-bottom: 0;
  }

  .modal-body {
    grid-template-columns: 1fr;
  }

  .template-editor-header {
    flex-direction: column;
  }
}

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