:root {
  color-scheme: light;
  --bg-main: #ffffff;
  --bg-panel: #f8fafc;
  --bg-input: #ffffff;
  --text-main: #0f172a;
  --text-muted: #334155;
  --line-soft: #cbd5e1;
  --line-strong: #e2e8f0;
  --accent: #1d4ed8;
  --accent-soft: #dbeafe;
  --pill-bg: #eff6ff;
  --pill-border: #bfdbfe;
}

body[data-theme="dark"] {
  color-scheme: dark;
  --bg-main: #0f172a;
  --bg-panel: #1e293b;
  --bg-input: #0f172a;
  --text-main: #e2e8f0;
  --text-muted: #cbd5e1;
  --line-soft: #334155;
  --line-strong: #475569;
  --accent: #60a5fa;
  --accent-soft: #1e3a8a;
  --pill-bg: #1e3a5f;
  --pill-border: #3b82f6;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  width: 100%;
  height: 100%;
  background: var(--bg-main);
  font-family: "Source Sans 3", sans-serif;
}

body {
  display: block;
  color: var(--text-main);
}

.hidden {
  display: none !important;
}

.app-shell {
  max-width: 980px;
  margin: 0 auto;
  padding: 20px;
  display: grid;
  grid-template-rows: auto 1fr;
  gap: 16px;
  min-height: 100dvh;
}

.app-topbar {
  border: 1px solid var(--line-strong);
  border-radius: 12px;
  background: var(--bg-panel);
  padding: 10px 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.app-title {
  margin: 0;
  font-size: 1.02rem;
  font-weight: 700;
}

.topbar-status {
  display: flex;
  align-items: center;
  gap: 8px;
}

.status-pill {
  border: 1px solid var(--pill-border);
  background: var(--pill-bg);
  border-radius: 999px;
  padding: 4px 10px;
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--text-main);
  font-variant-numeric: tabular-nums;
}

.top-panel,
.chat-section {
  border: 1px solid var(--line-strong);
  border-radius: 12px;
  padding: 14px;
  background: var(--bg-panel);
}

.top-panel {
  min-height: 0;
  display: grid;
  grid-template-rows: auto 1fr;
}

.top-tabs {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 10px;
}

.top-tabs-left,
.top-tabs-right {
  display: flex;
  align-items: center;
  gap: 8px;
}

.top-tab-btn {
  border: 1px solid var(--line-soft);
  background: var(--bg-input);
  color: var(--text-main);
  border-radius: 8px;
  padding: 8px 12px;
  font-size: 0.9rem;
  cursor: pointer;
}

.top-tab-btn.active {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--text-main);
}

.top-icon-btn {
  border: 1px solid var(--line-soft);
  background: var(--bg-input);
  color: var(--text-main);
  border-radius: 8px;
  padding: 7px 10px;
  font-size: 0.85rem;
  cursor: pointer;
  display: inline-flex;
  gap: 6px;
  align-items: center;
}

.top-icon-only {
  width: 36px;
  height: 36px;
  justify-content: center;
  padding: 0;
}

.top-icon-btn:disabled {
  opacity: 0.6;
  cursor: default;
}

.top-text-btn {
  border: 1px solid var(--line-soft);
  background: var(--bg-input);
  color: var(--text-main);
  border-radius: 8px;
  padding: 7px 10px;
  font-size: 0.9rem;
  text-transform: lowercase;
  cursor: pointer;
}

.top-panel-content {
  min-width: 0;
  min-height: 0;
}

.top-panel-content label {
  display: inline-block;
  margin-bottom: 8px;
  font-size: 0.9rem;
  color: var(--text-muted);
}

#panel-json {
  display: grid;
  grid-template-rows: auto 1fr;
}

#panel-graph {
  display: grid;
  grid-template-rows: auto 1fr;
}

.quizz-content {
  display: block;
  width: 100%;
  max-width: 100%;
  min-height: 220px;
  height: 100%;
  border: 1px solid var(--line-soft);
  border-radius: 8px;
  padding: 10px 12px;
  resize: vertical;
  background: var(--bg-input);
  color: var(--text-main);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 0.88rem;
  line-height: 1.35;
}

.graph-status {
  margin: 0 0 8px;
  font-size: 0.88rem;
  color: var(--text-muted);
}

.graph-status.error {
  color: #b91c1c;
}

.graph-viewport {
  min-height: 260px;
  height: 100%;
  border: 1px solid var(--line-soft);
  border-radius: 8px;
  padding: 0;
  background: var(--bg-input);
  overflow: hidden;
  position: relative;
}

.graph-canvas {
  position: absolute;
  inset: 0;
}

.graph-zoom-controls {
  position: absolute;
  right: 8px;
  bottom: 8px;
  display: grid;
  gap: 6px;
  z-index: 3;
}

.chat-log {
  min-height: 240px;
  max-height: 360px;
  overflow: auto;
  border: 1px solid var(--line-soft);
  border-radius: 8px;
  background: var(--bg-input);
  padding: 10px;
}

.chat-message {
  max-width: 90%;
  border-radius: 10px;
  padding: 8px 10px;
  margin-bottom: 8px;
  white-space: pre-wrap;
}

.chat-message.user {
  margin-left: auto;
  background: var(--accent-soft);
}

.chat-message.assistant {
  margin-right: auto;
  background: color-mix(in oklab, var(--bg-panel) 70%, var(--line-soft));
}

.chat-message.markdown p {
  margin: 0 0 0.4rem;
}

.chat-message.markdown p:last-child {
  margin-bottom: 0;
}

.chat-message.markdown pre {
  margin: 0.4rem 0;
  padding: 0.5rem;
  border-radius: 6px;
  overflow: auto;
  background: color-mix(in oklab, var(--bg-input) 72%, var(--line-soft));
}

.chat-message.markdown code {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 0.88em;
}

.chat-composer {
  margin-top: 10px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
  align-items: end;
}

.chat-input {
  border: 1px solid var(--line-soft);
  border-radius: 8px;
  padding: 10px 12px;
  resize: vertical;
  min-height: 72px;
  font-size: 0.95rem;
  background: var(--bg-input);
  color: var(--text-main);
}

.input-options {
  margin-top: 10px;
  border: 1px solid var(--line-soft);
  border-radius: 8px;
  background: var(--bg-input);
  padding: 10px;
  display: grid;
  gap: 10px;
}

.input-question-card {
  border: 1px solid var(--line-soft);
  border-radius: 8px;
  padding: 10px;
  background: var(--bg-panel);
}

.input-question-title {
  margin: 0 0 8px;
  font-size: 0.95rem;
  font-weight: 600;
}

.input-options-list {
  display: grid;
  gap: 8px;
}

.input-option-btn {
  display: grid;
  gap: 2px;
  width: 100%;
  text-align: left;
  border: 1px solid var(--pill-border);
  border-radius: 8px;
  background: var(--pill-bg);
  padding: 8px 10px;
  cursor: pointer;
}

.input-option-btn:hover {
  background: var(--accent-soft);
}

.input-option-btn.selected {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.input-option-label {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-main);
}

.input-option-description {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.edit-question-list {
  max-height: 320px;
  overflow: auto;
  border: 1px solid var(--line-soft);
  border-radius: 8px;
  background: var(--bg-input);
  padding: 8px;
  display: grid;
  gap: 8px;
  margin-bottom: 12px;
}

.edit-question-item {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: flex-start;
  gap: 10px;
  border: 1px solid var(--line-soft);
  border-radius: 8px;
  padding: 8px 10px;
  background: var(--bg-panel);
  cursor: pointer;
}

.edit-question-item input[type="radio"] {
  margin-top: 3px;
}

.edit-question-text {
  color: var(--text-main);
  font-size: 0.93rem;
  line-height: 1.3;
}

.identity-modal {
  border: 1px solid var(--line-strong);
  padding: 0;
  border-radius: 12px;
  max-width: 380px;
  width: calc(100% - 32px);
  box-shadow: 0 24px 80px rgba(15, 23, 42, 0.25);
  background: var(--bg-main);
  color: var(--text-main);
  position: fixed;
  inset: 0;
  margin: auto;
}

.identity-modal::backdrop {
  background: rgba(15, 23, 42, 0.45);
}

body[data-theme="dark"] .identity-modal {
  border-color: #60a5fa;
  box-shadow: 0 0 0 1px rgba(96, 165, 250, 0.55), 0 24px 80px rgba(2, 6, 23, 0.72);
}

.modal-content {
  padding: 20px;
  background: var(--bg-main);
  color: var(--text-main);
}

.modal-title {
  margin: 0;
  font-size: 1.2rem;
}

.modal-text {
  margin: 8px 0 16px;
  color: var(--text-muted);
}

.field-block {
  display: grid;
  gap: 6px;
  margin-bottom: 12px;
}

.field-block label {
  font-size: 0.85rem;
  color: var(--text-muted);
  text-transform: lowercase;
}

.field-input {
  border: 1px solid var(--line-soft);
  border-radius: 8px;
  padding: 10px 12px;
  font-size: 1rem;
  background: var(--bg-input);
  color: var(--text-main);
}

.field-input:focus {
  outline: 2px solid #2563eb;
  outline-offset: 1px;
}

.modal-error {
  min-height: 20px;
  margin-bottom: 12px;
  color: #dc2626;
  font-size: 0.9rem;
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
}

.modal-actions.split {
  justify-content: space-between;
}

.btn {
  border: none;
  border-radius: 8px;
  padding: 10px 14px;
  font-size: 0.95rem;
  cursor: pointer;
}

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

.btn.ghost {
  border: 1px solid var(--line-soft);
  background: var(--bg-input);
  color: var(--text-main);
}

.icon-toggle {
  padding: 7px 10px;
  text-transform: lowercase;
}

.chat-modal {
  border: 1px solid var(--line-strong);
  padding: 0;
  border-radius: 12px;
  width: min(980px, calc(100% - 24px));
  max-height: min(92vh, calc(100% - 24px));
  box-shadow: 0 24px 80px rgba(15, 23, 42, 0.25);
  position: fixed;
  inset: 0;
  margin: auto;
}

.chat-modal::backdrop {
  background: rgba(15, 23, 42, 0.45);
}

body[data-theme="dark"] .chat-modal {
  border-color: #60a5fa;
  box-shadow: 0 0 0 1px rgba(96, 165, 250, 0.55), 0 24px 80px rgba(2, 6, 23, 0.72);
}

.chat-modal-content {
  background: var(--bg-main);
  color: var(--text-main);
  padding: 12px;
  display: grid;
  gap: 10px;
  max-height: calc(100vh - 40px);
}

.chat-modal-header {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 10px;
}

.btn.primary:disabled {
  opacity: 0.65;
  cursor: default;
}

@media (max-width: 780px) {
  .app-shell {
    padding: 12px;
  }

  .chat-composer {
    grid-template-columns: 1fr;
  }
}
  background: var(--bg-input);
  color: var(--text-main);
  background: var(--bg-input);
  color: var(--text-main);