* {
  box-sizing: border-box;
}

:root {
  color-scheme: dark;
  --bg: #0b0f1a;
  --panel: rgba(18, 23, 40, 0.85);
  --panel-strong: rgba(22, 28, 50, 0.95);
  --text: #eef1ff;
  --muted: #9aa3c7;
  --accent: #7b8dff;
  --accent-2: #52f2c2;
  --border: rgba(123, 141, 255, 0.2);
  --glow: 0 0 30px rgba(123, 141, 255, 0.25);
  font-family: "Space Grotesk", system-ui, sans-serif;
}

body {
  margin: 0;
  min-height: 100vh;
  background: radial-gradient(circle at top, #1d2440 0%, #0b0f1a 50%, #05070c 100%);
  color: var(--text);
}

.app {
  max-width: 1400px;
  margin: 0 auto;
  padding: 32px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 16px;
}

.brand-mark {
  font-family: "Fraunces", serif;
  font-weight: 700;
  font-size: 20px;
  padding: 10px 14px;
  border-radius: 12px;
  background: linear-gradient(135deg, #7b8dff, #52f2c2);
  color: #0a0d1a;
  box-shadow: var(--glow);
}

.brand-title {
  font-size: 22px;
  font-weight: 600;
}

.brand-subtitle {
  font-size: 13px;
  color: var(--muted);
}

.topbar-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.action-menu {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 260px;
  padding: 8px 10px;
  border-radius: 14px;
  border: 1px solid rgba(123, 141, 255, 0.25);
  background: rgba(12, 16, 30, 0.7);
}

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

.columns-control {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 240px;
  padding: 8px 10px;
  border-radius: 14px;
  border: 1px solid rgba(123, 141, 255, 0.25);
  background: rgba(12, 16, 30, 0.7);
}

.columns-control.compact {
  min-width: auto;
}

.subtab-row {
  display: flex;
  gap: 8px;
  margin: 10px 0 14px;
  flex-wrap: wrap;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  padding-bottom: 6px;
}

.subtab-btn {
  border: 1px solid transparent;
  border-bottom: 2px solid transparent;
  background: transparent;
  color: var(--text);
  padding: 8px 14px 6px;
  border-radius: 10px 10px 0 0;
  font-size: 12px;
  cursor: pointer;
}

.subtab-btn.active {
  background: rgba(16, 22, 40, 0.9);
  border: 1px solid rgba(123, 141, 255, 0.4);
  border-bottom: 2px solid #7b8dff;
  color: #e6ecff;
}

.subtab-panel.hidden {
  display: none;
}

.grid-footer {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin: 8px 0 12px;
}

.anim-controls {
  display: flex;
  gap: 14px;
  align-items: center;
  flex-wrap: wrap;
  padding: 8px 10px;
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(10, 14, 26, 0.6);
}

.columns-footer {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 8px 10px;
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(10, 14, 26, 0.6);
}

.anim-buttons {
  display: flex;
  gap: 8px;
  align-items: center;
}

.icon-btn {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: rgba(14, 18, 30, 0.9);
  color: #e6ecff;
  font-size: 14px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: inset 0 0 8px rgba(0, 0, 0, 0.4);
}

.icon-btn:hover {
  border-color: rgba(123, 141, 255, 0.6);
  box-shadow: 0 0 12px rgba(123, 141, 255, 0.4);
}

.anim-speed {
  min-width: 240px;
}

.anim-speed label {
  font-size: 11px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  display: block;
  margin-bottom: 6px;
}

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

.columns-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.columns-row input[type="range"] {
  flex: 1;
}

.columns-value {
  min-width: 38px;
  text-align: center;
  padding: 6px 8px;
  border-radius: 10px;
  border: 1px solid rgba(123, 141, 255, 0.35);
  background: rgba(123, 141, 255, 0.12);
  font-weight: 700;
}

.columns-note {
  font-size: 11px;
  color: var(--muted);
}

.append-mode {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 140px;
}

.content-mode {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 180px;
}

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

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

.grid {
  display: grid;
  grid-template-columns: 1.4fr 0.6fr;
  gap: 20px;
  align-items: start;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 20px;
  backdrop-filter: blur(16px);
  box-shadow: 0 10px 30px rgba(6, 9, 20, 0.4);
}

.viz {
  min-height: 100%;
}

.control {
  min-height: 100%;
}

h2,
h3 {
  margin: 0 0 12px;
  font-family: "Fraunces", serif;
  font-weight: 600;
}

.muted {
  color: var(--muted);
  font-size: 14px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin: 16px 0;
}

label {
  font-size: 13px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

select,
button,
input[type="range"] {
  font-family: inherit;
}

input[type="number"] {
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(13, 17, 30, 0.85);
  color: var(--text);
}

select {
  padding: 10px 14px;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(13, 17, 30, 0.85);
  color: var(--text);
}

.btn {
  padding: 12px 18px;
  border-radius: 12px;
  border: 1px solid transparent;
  cursor: pointer;
  font-weight: 600;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn.primary {
  background: linear-gradient(135deg, #7b8dff, #52f2c2);
  color: #0a0d1a;
}

.btn.ghost {
  background: transparent;
  border-color: rgba(123, 141, 255, 0.4);
  color: var(--text);
}

.btn:hover {
  transform: translateY(-1px);
  box-shadow: var(--glow);
}

.btn.small {
  padding: 6px 10px;
  font-size: 12px;
}

.tool-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 12px;
}

.tool-row button {
  flex: 1;
}

.file-btn {
  position: relative;
  overflow: hidden;
}

.file-btn input[type="file"] {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}

.divider {
  height: 1px;
  background: rgba(255, 255, 255, 0.06);
  margin: 20px 0;
}

.story-block {
  margin-top: 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.story-block textarea {
  width: 100%;
  min-height: 220px;
  resize: vertical;
  padding: 14px;
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(9, 12, 22, 0.9);
  color: var(--text);
  font-family: "Space Grotesk", system-ui, sans-serif;
  font-size: 14px;
  line-height: 1.5;
}

.perf-block {
  margin-top: 18px;
  padding: 14px;
  border-radius: 16px;
  border: 1px solid rgba(82, 242, 194, 0.18);
  background: rgba(10, 18, 28, 0.7);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

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

.perf-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.perf-card {
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.06);
  background: rgba(8, 12, 24, 0.85);
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-height: 84px;
}

.perf-card.highlight {
  border-color: rgba(123, 141, 255, 0.45);
  box-shadow: var(--glow);
}

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

.perf-value {
  font-size: 22px;
  font-weight: 700;
  color: var(--text);
}

.perf-sub {
  font-size: 12px;
  color: var(--muted);
  white-space: pre-line;
}

.perf-compare {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 10px 12px;
  border-radius: 14px;
  border: 1px solid rgba(123, 141, 255, 0.2);
  background: rgba(12, 18, 32, 0.75);
}

.perf-compare-title {
  font-size: 11px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.perf-compare-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
}

.perf-compare-name {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
}

.perf-compare-speed {
  font-size: 13px;
  color: var(--accent-2);
  font-weight: 700;
}

.perf-bars {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.perf-bar {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 8px;
  align-items: center;
}

.perf-bar-label {
  font-size: 12px;
  color: var(--muted);
}

.perf-bar-track {
  height: 22px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.06);
  overflow: visible;
  position: relative;
}

.perf-bar-fill {
  height: 100%;
  border-radius: 999px;
  transition: width 200ms ease;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding-right: 8px;
  box-sizing: border-box;
  overflow: hidden;
}

.perf-bar-value {
  font-size: 11px;
  font-weight: 700;
  color: #0b0f1a;
  text-shadow: 0 1px 0 rgba(255, 255, 255, 0.25);
  white-space: nowrap;
}

.perf-bar-fill.vsa {
  background: linear-gradient(90deg, #7b8dff, #52f2c2);
}

.perf-bar-fill.naive {
  background: linear-gradient(90deg, #ff8a6b, #ff5c8a);
}

.tab-row {
  display: flex;
  gap: 8px;
}

.tab-btn {
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid rgba(123, 141, 255, 0.25);
  background: transparent;
  color: var(--text);
  cursor: pointer;
  font-size: 12px;
}

.tab-btn.active {
  background: rgba(123, 141, 255, 0.2);
  box-shadow: var(--glow);
}

.tab-panel.hidden {
  display: none;
}

.grid-meta {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 13px;
  color: var(--muted);
}

.columns-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  font-size: 12px;
  color: var(--muted);
}

.frames-inline {
  margin-top: 12px;
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(10, 14, 28, 0.65);
}

.frames-inline-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.frames-inline-header h4 {
  margin: 0 0 4px;
  font-size: 14px;
}

.frames-inline-controls {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 10px;
  margin-top: 10px;
}

.frames-now {
  margin-top: 8px;
  font-size: 12px;
  color: var(--muted);
  padding: 6px 10px;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(10, 14, 28, 0.65);
}

.frames-legend {
  display: grid;
  gap: 6px;
  margin-top: 10px;
}

.control-stack {
  display: grid;
  gap: 12px;
  margin: 12px 0 18px;
}

.frame-row {
  display: grid;
  grid-template-columns: 1.1fr 1.2fr auto;
  gap: 8px;
  align-items: center;
  padding: 6px 8px;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(12, 16, 30, 0.6);
  font-size: 12px;
}

.frame-name {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.frame-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
}

.frame-bar {
  position: relative;
  height: 6px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 999px;
  overflow: hidden;
}

.frame-bar span {
  position: absolute;
  inset: 0;
  transform-origin: left;
  border-radius: 999px;
}

.frame-count {
  color: var(--muted);
}

.columns-checkboxes {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.columns-checkboxes label {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 12px;
  color: var(--text);
  padding: 4px 6px;
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(12, 16, 30, 0.6);
}

.column-swatch {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  box-shadow: 0 0 6px rgba(0, 0, 0, 0.4);
}

.columns-actions {
  display: inline-flex;
  gap: 6px;
}

.activity-log {
  min-height: 120px;
  max-height: 200px;
  overflow: auto;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(10, 14, 28, 0.85);
  padding: 8px 10px;
  font-size: 12px;
  color: var(--text);
}

.activity-entry {
  display: flex;
  gap: 8px;
  margin-bottom: 6px;
}

.activity-time {
  color: var(--muted);
  min-width: 52px;
}

.activity-entry.info .activity-message {
  color: #b8c6ff;
}

.activity-entry.success .activity-message {
  color: #9bf5c9;
}

.activity-entry.warn .activity-message {
  color: #ffd27a;
}

.activity-entry.error .activity-message {
  color: #ff9b9b;
}

.space-card.inactive {
  opacity: 0.45;
  filter: grayscale(0.3);
}

.spaces-panel {
  padding: 6px 0 12px;
}

.spaces-header {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: flex-start;
  margin-bottom: 12px;
}

.spaces-header h3 {
  margin: 0 0 4px;
  font-size: 16px;
}

.spaces-legend {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 10px;
}

.legend-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 8px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(12, 16, 30, 0.6);
}

.legend-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(123, 141, 255, 0.9);
}

.legend-dot.inactive {
  background: rgba(255, 255, 255, 0.25);
}

.spaces-filters {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 10px;
  margin-bottom: 10px;
}

.spaces-note {
  font-size: 11px;
  color: var(--muted);
  margin-top: 6px;
  margin-bottom: 6px;
}

.field.compact label {
  font-size: 11px;
}

.field.compact input,
.field.compact select {
  padding: 8px 10px;
}

.spaces-meta {
  font-size: 12px;
  color: var(--muted);
  padding: 6px 10px;
  border-radius: 10px;
  background: rgba(123, 141, 255, 0.12);
  border: 1px solid rgba(123, 141, 255, 0.3);
}

.spaces-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 10px;
}

.space-group {
  grid-column: 1 / -1;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
  margin: 8px 0 2px;
}

.space-card {
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(10, 14, 28, 0.82);
  padding: 10px 12px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.space-title {
  font-size: 13px;
  font-weight: 600;
}

.space-meta {
  font-size: 12px;
  color: var(--muted);
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.space-spark {
  width: 100%;
  height: 36px;
}

.canvas-wrap {
  border-radius: 18px;
  background: rgba(7, 10, 20, 0.9);
  border: 1px solid rgba(255, 255, 255, 0.06);
  padding: 12px;
  margin: 10px 0 12px;
  box-shadow: inset 0 0 30px rgba(0, 0, 0, 0.5);
}

canvas {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 12px;
}

.viz-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.hint {
  font-size: 12px;
  color: var(--muted);
}

.status {
  margin-top: 12px;
  font-size: 13px;
  min-height: 18px;
  color: #f7b4b4;
}

body.is-busy {
  cursor: progress;
}

body.is-busy * {
  cursor: progress;
}

.busy-overlay {
  position: fixed;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  background: rgba(6, 9, 18, 0.7);
  backdrop-filter: blur(2px);
  z-index: 9999;
}

.busy-overlay.active {
  display: flex;
}

.busy-dialog {
  min-width: 240px;
  padding: 18px 20px;
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(10, 15, 30, 0.96);
  box-shadow: var(--shadow), var(--glow);
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text);
  font-weight: 600;
}

.busy-spinner {
  width: 18px;
  height: 18px;
  border-radius: 999px;
  border: 2px solid rgba(255, 255, 255, 0.25);
  border-top-color: var(--accent);
  animation: busy-spin 0.9s linear infinite;
}

.busy-text {
  font-size: 13px;
  letter-spacing: 0.2px;
}

@keyframes busy-spin {
  to {
    transform: rotate(360deg);
  }
}

.mismatch-overlay {
  position: fixed;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  background: rgba(4, 6, 14, 0.78);
  backdrop-filter: blur(3px);
  z-index: 10000;
  padding: 20px;
}

.mismatch-overlay.active {
  display: flex;
}

.mismatch-dialog {
  width: min(980px, 96vw);
  max-height: 86vh;
  overflow: auto;
  padding: 18px 20px;
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(9, 13, 28, 0.98);
  box-shadow: var(--shadow), var(--glow);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.mismatch-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.mismatch-title {
  font-weight: 700;
  color: #ffd6d6;
}

.mismatch-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
  font-size: 12px;
  color: var(--muted);
}

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

.mismatch-col {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.mismatch-col-title {
  font-size: 12px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.6px;
}

.mismatch-col textarea {
  min-height: 160px;
  resize: vertical;
}

@media (max-width: 1100px) {
  .grid {
    grid-template-columns: 1fr;
  }

  .perf-grid {
    grid-template-columns: 1fr;
  }

  .columns-control {
    width: 100%;
  }

  .mismatch-grid {
    grid-template-columns: 1fr;
  }

  .spaces-filters {
    grid-template-columns: 1fr;
  }
}

.tutorial-link {
  margin-left: 16px;
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid rgba(123, 141, 255, 0.4);
  color: var(--text);
  text-decoration: none;
  font-size: 12px;
  background: rgba(14, 18, 30, 0.7);
}

.tutorial-link:hover {
  border-color: rgba(123, 141, 255, 0.8);
  box-shadow: 0 0 12px rgba(123, 141, 255, 0.4);
}

.tutorial-body .topbar {
  margin-bottom: 24px;
}

.tutorial-app .tutorial-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
  gap: 18px;
}

.tutorial-panel {
  padding: 18px;
}

.tutorial-header {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  flex-wrap: wrap;
}

.tutorial-kicker {
  text-transform: uppercase;
  letter-spacing: 0.2em;
  font-size: 11px;
  color: var(--muted);
}

.tutorial-title {
  margin: 8px 0 6px;
  font-size: 28px;
  font-family: "Fraunces", serif;
}

.tutorial-legend {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
  font-size: 12px;
  color: var(--muted);
}

.legend-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
  margin-right: 6px;
}

.legend-dot.col-a {
  background: #7b8dff;
}

.legend-dot.col-b {
  background: #52f2c2;
}

.legend-dot.col-c {
  background: #ffd166;
}

.legend-dot.col-d {
  background: #f78ff0;
}

.legend-dot.event-dot {
  background: #f97316;
}

.tutorial-canvas-wrap {
  margin-top: 14px;
  border-radius: 16px;
  border: 1px solid rgba(123, 141, 255, 0.2);
  overflow: hidden;
  background: rgba(8, 12, 24, 0.8);
}

.tutorial-canvas-wrap canvas {
  width: 100%;
  height: auto;
  display: block;
}

.tutorial-controls {
  margin-top: 14px;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 14px;
  align-items: center;
}

.tutorial-speed {
  min-width: 260px;
}

.tutorial-step-row {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
  margin-top: 8px;
}

.tutorial-step {
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(10, 14, 26, 0.7);
  color: var(--muted);
  font-size: 12px;
  cursor: pointer;
}

.tutorial-step.active {
  border-color: rgba(123, 141, 255, 0.8);
  color: var(--text);
  background: rgba(123, 141, 255, 0.2);
}

.tutorial-side .tutorial-card+.tutorial-card {
  margin-top: 16px;
}

.tutorial-card {
  padding: 16px;
  border-radius: 16px;
  background: rgba(12, 16, 30, 0.8);
  border: 1px solid rgba(123, 141, 255, 0.2);
}

.tutorial-card-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
}

.tutorial-card h2 {
  margin: 8px 0 10px;
}

.tutorial-card ul {
  margin: 8px 0 0 16px;
  color: var(--muted);
}

.tutorial-signals {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 8px;
}

.tutorial-signal {
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid rgba(123, 141, 255, 0.25);
  background: rgba(12, 16, 30, 0.8);
  font-size: 12px;
  color: var(--text);
}

/* Lesson Navigation */
.lesson-nav-card {
  padding: 12px;
}

.lesson-nav {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-top: 8px;
}

.lesson-nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid transparent;
  background: rgba(10, 14, 26, 0.6);
  color: var(--muted);
  cursor: pointer;
  transition: all 0.15s ease;
  font-size: 13px;
  text-align: left;
}

.lesson-nav-item:hover {
  background: rgba(123, 141, 255, 0.1);
  border-color: rgba(123, 141, 255, 0.3);
  color: var(--text);
}

.lesson-nav-item.active {
  background: linear-gradient(135deg, rgba(123, 141, 255, 0.2), rgba(82, 242, 194, 0.15));
  border-color: rgba(123, 141, 255, 0.5);
  color: var(--text);
  box-shadow: 0 0 12px rgba(123, 141, 255, 0.2);
}

.lesson-nav-item.completed {
  border-color: rgba(82, 242, 194, 0.4);
}

.lesson-nav-item.completed .lesson-num {
  background: linear-gradient(135deg, #52f2c2, #7b8dff);
}

.lesson-num {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 24px;
  height: 24px;
  border-radius: 50%;
  background: rgba(123, 141, 255, 0.3);
  font-weight: 700;
  font-size: 12px;
  color: var(--text);
}

.lesson-nav-item.active .lesson-num {
  background: linear-gradient(135deg, #7b8dff, #52f2c2);
  color: #0a0d1a;
  box-shadow: 0 0 10px rgba(123, 141, 255, 0.4);
}

.lesson-name {
  flex: 1;
}

/* Progress indicator */
.lesson-progress {
  margin-top: 12px;
  padding: 8px 12px;
  border-radius: 10px;
  background: rgba(10, 14, 26, 0.6);
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  color: var(--muted);
}

.lesson-progress-bar {
  flex: 1;
  height: 4px;
  border-radius: 2px;
  background: rgba(255, 255, 255, 0.1);
  overflow: hidden;
}

.lesson-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, #7b8dff, #52f2c2);
  transition: width 0.3s ease;
}

@media (max-width: 1100px) {
  .tutorial-app .tutorial-layout {
    grid-template-columns: 1fr;
  }

  .tutorial-controls {
    grid-template-columns: 1fr;
  }

  .lesson-nav {
    flex-direction: row;
    flex-wrap: wrap;
  }

  .lesson-nav-item {
    flex: 1;
    min-width: 120px;
  }
}

/* Thousand Brains Theory Visualization Toggle */
.theory-viz-toggle {
  margin-top: 10px;
  padding: 8px 10px;
  border-radius: 10px;
  border: 1px solid rgba(249, 115, 22, 0.25);
  background: rgba(249, 115, 22, 0.08);
}

.toggle-label {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  font-size: 12px;
}

.toggle-label input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: #f97316;
}

.toggle-text {
  color: var(--text);
  font-weight: 500;
}

.toggle-hint {
  color: var(--muted);
  font-size: 10px;
}

/* Tutorial Mute Button */
.tutorial-mute-btn {
  font-size: 18px;
  background: rgba(139, 92, 246, 0.15);
  border: 1px solid rgba(139, 92, 246, 0.3);
  transition: all 0.2s ease;
}

.tutorial-mute-btn:hover {
  background: rgba(139, 92, 246, 0.25);
  border-color: rgba(139, 92, 246, 0.5);
}

.tutorial-mute-btn[title*="Unmute"] {
  opacity: 0.6;
}

/* Tutorial Repeat Button */
.tutorial-repeat-btn {
  font-size: 16px;
  background: rgba(249, 115, 22, 0.15);
  border: 1px solid rgba(249, 115, 22, 0.3);
  transition: all 0.2s ease;
}

.tutorial-repeat-btn:hover {
  background: rgba(249, 115, 22, 0.25);
  border-color: rgba(249, 115, 22, 0.5);
  box-shadow: 0 0 10px rgba(249, 115, 22, 0.3);
}

.tutorial-repeat-btn:active {
  transform: scale(0.95);
}

/* Signal tags in tutorial */
.signal-tag {
  display: inline-block;
  padding: 4px 10px;
  margin: 3px 4px 3px 0;
  font-size: 11px;
  font-weight: 500;
  border-radius: 12px;
  background: rgba(139, 92, 246, 0.15);
  border: 1px solid rgba(139, 92, 246, 0.3);
  color: #c4b5fd;
}

/* Tutorial Language Selector */
.tutorial-lang-selector {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px 10px;
  border-radius: 12px;
  background: rgba(82, 242, 194, 0.08);
  border: 1px solid rgba(82, 242, 194, 0.2);
}

.tutorial-lang-selector .lang-label {
  font-size: 11px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.tutorial-lang-selector .lang-select {
  padding: 6px 10px;
  border-radius: 8px;
  border: 1px solid rgba(82, 242, 194, 0.3);
  background: rgba(10, 14, 26, 0.85);
  color: var(--text);
  font-size: 12px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.tutorial-lang-selector .lang-select:hover {
  border-color: rgba(82, 242, 194, 0.5);
  background: rgba(82, 242, 194, 0.1);
}

.tutorial-lang-selector .lang-select:focus {
  outline: none;
  border-color: rgba(82, 242, 194, 0.6);
  box-shadow: 0 0 8px rgba(82, 242, 194, 0.3);
}