:root {
  --bg: #171a18;
  --panel: #1d211f;
  --panel-2: #222725;
  --border: #2e3531;
  --text: #f1eee6;
  --muted: #97a196;
  --accent: #8bb89a;
  --accent-strong: #a7d1b4;
  --shadow: 0 16px 32px rgba(0, 0, 0, 0.22);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: "IBM Plex Mono", "JetBrains Mono", "Consolas", monospace;
}

button {
  font: inherit;
  color: inherit;
}

select {
  font: inherit;
  color: inherit;
}

textarea {
  font: inherit;
  color: inherit;
}

pre {
  font: inherit;
}

.shell {
  width: min(1100px, calc(100% - 32px));
  margin: 0 auto;
  padding: 24px 0 36px;
}

.masthead {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 16px;
  margin-bottom: 16px;
}

.tagline {
  margin: 4px 0 0;
  font-size: 0.85rem;
  color: #888;
  letter-spacing: 0.01em;
}

.eyebrow,
.panel-heading,
.microstate,
.back-link,
.source-detail {
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 11px;
  color: var(--muted);
}

h1 {
  margin: 0;
  font-size: 32px;
  font-weight: 600;
  letter-spacing: 0.01em;
}

.strap {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.5;
}

.back-link {
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.back-link:hover,
.back-link:focus-visible {
  border-bottom-color: var(--accent);
}

.panel {
  border: 1px solid var(--border);
  background: var(--panel);
  box-shadow: var(--shadow);
  padding: 14px;
}

.intro-panel,
.prompt-detail-panel,
.actions-panel,
.stats-panel,
.result-nav {
  margin-bottom: 16px;
}

.panel-heading {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 10px;
}

.intro-copy {
  margin: 0;
  color: var(--muted);
  line-height: 1.5;
  font-size: 13px;
}

.prompt-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-bottom: 16px;
}

.prompt-card {
  border: 1px solid var(--border);
  background: var(--panel-2);
  padding: 14px;
  text-align: left;
  cursor: pointer;
  transition: border-color 120ms ease, background 120ms ease;
}

.prompt-card:hover,
.prompt-card:focus-visible {
  border-color: #46524b;
}

.prompt-card.selected {
  border-color: var(--accent);
  background: #202722;
}

.prompt-kicker {
  display: block;
  margin-bottom: 8px;
  font-size: 11px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.prompt-name {
  display: block;
  font-size: 16px;
  font-weight: 600;
}

.action-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

.run-button {
  border: 1px solid var(--accent);
  background: transparent;
  padding: 12px 18px;
  min-width: 164px;
  cursor: pointer;
}

.run-button:hover,
.run-button:focus-visible {
  background: rgba(139, 184, 154, 0.08);
}

.run-button:disabled {
  cursor: default;
  opacity: 0.55;
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 10px;
}

.stat-card {
  border: 1px solid var(--border);
  background: var(--panel-2);
  padding: 12px;
}

.stat-label {
  display: block;
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.stat-value {
  color: var(--accent-strong);
  font-size: 16px;
  font-weight: 600;
}

.result-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.nav-chip {
  border: 1px solid var(--border);
  background: var(--panel-2);
  color: var(--text);
  padding: 8px 12px;
  cursor: pointer;
}

.nav-chip:hover,
.nav-chip:focus-visible {
  border-color: var(--accent);
  color: var(--accent-strong);
}

.status-stack {
  display: flex;
  flex-direction: column;
  gap: 4px;
  text-align: right;
}

.selected-label,
.source-label {
  color: var(--accent-strong);
}

.selected-label {
  font-size: 16px;
  font-weight: 600;
}

.source-label {
  font-size: 13px;
}

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

.result-panel {
  min-height: 260px;
}

.artifact-panel {
  grid-column: 1 / -1;
}

.section-title {
  color: var(--accent-strong);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.pane-output {
  margin: 0;
  white-space: pre-wrap;
  word-break: break-word;
  line-height: 1.6;
  max-height: 420px;
  overflow: auto;
  font-size: 13px;
}

.model-select-panel {
  padding: 12px 16px;
}

.model-select-row {
  display: flex;
  gap: 16px;
}

.model-select-group {
  display: flex;
  flex-direction: column;
  gap: 4px;
  flex: 1;
}

.model-select-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.model-select {
  background: #181c1a;
  border: 1px solid var(--border);
  color: var(--text);
  padding: 6px 8px;
  font-size: 12px;
  font-family: inherit;
  cursor: pointer;
}

.model-select option:disabled {
  color: #555;
}

.copy-btn {
  margin-left: auto;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--muted);
  padding: 2px 8px;
  font-size: 11px;
  cursor: pointer;
  font-family: inherit;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.copy-btn:hover {
  border-color: var(--accent);
  color: var(--accent-strong);
}

.copy-btn.copied {
  color: var(--accent-strong);
}

.prompt-input {
  width: 100%;
  min-height: 200px;
  border: 1px solid var(--border);
  background: #181c1a;
  color: var(--text);
  padding: 12px;
  resize: vertical;
  line-height: 1.6;
  font-size: 13px;
}

.prompt-input:focus {
  outline: 1px solid var(--accent);
  border-color: var(--accent);
}

.pane-output.empty,
.stack-list.empty {
  color: var(--muted);
}

.stack-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.stack-item {
  border-left: 2px solid var(--accent);
  padding: 0 0 0 10px;
}

.stack-item .meta {
  margin-bottom: 4px;
  color: var(--accent-strong);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.stack-item .body {
  white-space: pre-wrap;
  word-break: break-word;
  line-height: 1.5;
  font-size: 13px;
}

.hidden {
  display: none !important;
}

.artifact-tabs {
  display: flex;
  gap: 10px;
  margin-bottom: 16px;
}

.artifact-tab {
  border: 1px solid var(--border);
  background: var(--panel-2);
  color: var(--text);
  padding: 8px 12px;
  cursor: pointer;
}

.artifact-tab.active,
.artifact-tab:hover,
.artifact-tab:focus-visible {
  border-color: var(--accent);
  color: var(--accent-strong);
}

.artifact-tab:disabled {
  cursor: default;
  opacity: 0.55;
}

.artifact-view {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.artifact-block {
  border: 1px solid var(--border);
  background: var(--panel-2);
  padding: 12px;
}

.artifact-block-heading {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 10px;
}

.claim-list,
.formatted-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.claim-item,
.formatted-item {
  border-left: 2px solid var(--accent);
  padding-left: 10px;
}

.claim-meta,
.formatted-line-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
}

.claim-id,
.claim-tag,
.format-banner,
.format-label {
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.claim-id {
  color: var(--accent-strong);
}

.claim-tag {
  color: var(--text);
  border: 1px solid var(--border);
  padding: 2px 6px;
  background: #181c1a;
}

.claim-text,
.formatted-line-text {
  white-space: pre-wrap;
  word-break: break-word;
  line-height: 1.5;
  font-size: 13px;
}

.format-disclosure {
  margin-bottom: 14px;
  padding: 10px 12px;
  border: 1px solid var(--border);
  color: var(--muted);
  font-size: 12px;
  line-height: 1.5;
}

.format-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.format-select {
  min-width: 220px;
  border: 1px solid var(--border);
  background: #181c1a;
  color: var(--text);
  padding: 10px 12px;
}

.format-banner,
.format-empty,
.formatted-source {
  border: 1px solid var(--border);
  background: var(--panel-2);
  padding: 12px;
}

.format-banner {
  color: var(--muted);
}

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

.formatted-line-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
}

.source-toggle {
  border: 1px solid var(--border);
  background: transparent;
  padding: 6px 10px;
  cursor: pointer;
}

.source-toggle:hover,
.source-toggle:focus-visible {
  border-color: var(--accent);
  color: var(--accent-strong);
}

.formatted-source {
  margin-top: 10px;
}

.formatted-source-claim + .formatted-source-claim {
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px solid var(--border);
}

@media (max-width: 900px) {
  .stat-grid,
  .prompt-grid,
  .result-grid {
    grid-template-columns: 1fr;
  }

  .masthead,
  .action-row {
    flex-direction: column;
    align-items: flex-start;
  }

  .status-stack {
    text-align: left;
  }

  .run-button {
    width: 100%;
  }

  .formatted-line-row {
    flex-direction: column;
  }

  .model-select-row {
    flex-direction: column;
  }
}