.explorer {
  display: grid;
  grid-template-columns: 17rem minmax(0, 1fr);
  min-height: 100vh;
}

.explorer-sidebar {
  background: var(--color-surface);
  border-right: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow-y: auto;
  padding: var(--space-lg);
  position: sticky;
  top: 0;
  z-index: 20;
}

.explorer-brand {
  align-items: center;
  display: flex;
  justify-content: space-between;
  margin-bottom: var(--space-2xl);
}

.explorer-brand > a {
  align-items: center;
  display: flex;
  gap: var(--space-sm);
  text-decoration: none;
}

.explorer-brand strong,
.explorer-brand small {
  display: block;
}

.explorer-brand strong {
  font-size: var(--text-sm);
}

.explorer-brand small {
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 0.65rem;
  margin-top: 0.1rem;
}

.explorer-mark {
  align-items: center;
  background: var(--color-text);
  border-radius: var(--radius-sm);
  color: var(--color-canvas);
  display: flex;
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 700;
  height: 2.25rem;
  justify-content: center;
  width: 2.25rem;
}

.navigation-group + .navigation-group {
  margin-top: var(--space-xl);
}

.navigation-group h2 {
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.11em;
  margin: 0 0 var(--space-xs);
  text-transform: uppercase;
}

.navigation-group a {
  border-radius: var(--radius-sm);
  color: var(--color-text-muted);
  display: block;
  font-size: var(--text-sm);
  font-weight: 550;
  padding: 0.55rem 0.65rem;
  text-decoration: none;
}

.navigation-group a:hover {
  background: var(--color-surface-subtle);
  color: var(--color-text);
}

.navigation-group a[aria-current="page"] {
  background: var(--color-accent-soft);
  color: var(--color-accent);
  font-weight: 700;
}

.explorer-sidebar-note {
  align-items: center;
  border-top: 1px solid var(--color-border);
  color: var(--color-text-muted);
  display: flex;
  font-size: var(--text-xs);
  gap: var(--space-xs);
  margin-top: auto;
  padding-top: var(--space-lg);
}

.status-dot {
  background: var(--color-accent);
  border-radius: 50%;
  height: 0.5rem;
  width: 0.5rem;
}

.explorer-main {
  min-width: 0;
}

.explorer-toolbar {
  align-items: center;
  background: color-mix(in srgb, var(--color-canvas), transparent 8%);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  justify-content: space-between;
  min-height: 5rem;
  padding: var(--space-md) var(--space-xl);
  position: sticky;
  top: 0;
  z-index: 10;
}

.toolbar-leading,
.toolbar-actions {
  align-items: center;
  display: flex;
  gap: var(--space-md);
}

.explorer-toolbar h1 {
  font-size: 1rem;
  margin: 0.15rem 0 0;
}

.icon-button {
  align-items: center;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  display: inline-flex;
  height: 2.5rem;
  justify-content: center;
  min-width: 2.5rem;
}

.sidebar-open,
.sidebar-close {
  display: none;
}

.segmented-control {
  background: var(--color-surface-subtle);
  border-radius: var(--radius-md);
  display: flex;
  padding: 0.2rem;
}

.segmented-control button {
  background: transparent;
  border: 0;
  border-radius: 0.35rem;
  color: var(--color-text-muted);
  font-size: var(--text-xs);
  min-height: 2rem;
  padding: 0 var(--space-sm);
}

.segmented-control button.is-active {
  background: var(--color-surface);
  box-shadow: 0 1px 4px rgb(28 33 30 / 10%);
  color: var(--color-text);
}

.explorer-workspace {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 18rem;
}

.preview-column {
  min-width: 0;
  padding: var(--space-xl);
}

.story-description {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  margin: 0 0 var(--space-lg);
  max-width: 68ch;
}

.preview-frame {
  align-items: flex-start;
  display: flex;
  justify-content: center;
  min-height: 31rem;
  overflow: auto;
  padding-bottom: var(--space-md);
}

.preview-stage {
  background: var(--color-canvas);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: 0 2px 12px rgb(28 33 30 / 5%);
  container-name: story;
  container-type: inline-size;
  min-height: 30rem;
  overflow: visible;
  padding: clamp(1rem, 3vw, 2.5rem);
  transition: width var(--duration-base) var(--ease-standard);
  width: 100%;
}

.preview-frame[data-preview-width="mobile"] .preview-stage {
  width: min(100%, 390px);
}

.preview-frame[data-preview-width="tablet"] .preview-stage {
  width: min(100%, 768px);
}

.story-stack {
  display: grid;
  gap: var(--space-xl);
}

.story-row {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
}

.story-label {
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  margin: 0 0 var(--space-sm);
  text-transform: uppercase;
}

.swatch-grid {
  display: grid;
  gap: var(--space-md);
  grid-template-columns: repeat(auto-fit, minmax(9rem, 1fr));
}

.swatch {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.swatch__color {
  background: var(--swatch);
  height: 6rem;
}

.swatch__label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  padding: var(--space-sm);
}

.type-sample-display {
  font-family: var(--font-display);
  font-size: clamp(3.5rem, 10vw, 8rem);
  letter-spacing: -0.06em;
  line-height: 0.9;
  margin: 0;
}

.type-sample-body {
  font-size: var(--text-reading);
  line-height: 1.7;
  max-width: 65ch;
}

.type-sample-mono {
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.type-scale-list {
  display: grid;
  gap: 0;
}

.type-scale-row {
  align-items: baseline;
  border-top: 1px solid var(--color-border);
  display: grid;
  gap: var(--space-lg);
  grid-template-columns: 8rem minmax(0, 1fr) 7rem;
  padding: var(--space-lg) 0;
}

.type-scale-row strong {
  font-size: var(--text-xs);
}

.type-scale-row code {
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
}

.type-scale-row__sample {
  line-height: 1.2;
  margin: 0;
}

.type-scale-row[data-role="display"] .type-scale-row__sample {
  font-family: var(--font-display);
  font-size: var(--text-h1);
  letter-spacing: -0.055em;
  line-height: 0.95;
}

.type-scale-row[data-role="h2"] .type-scale-row__sample {
  font-family: var(--font-display);
  font-size: var(--text-h2);
  letter-spacing: -0.04em;
  line-height: 1;
}

.type-scale-row[data-role="h3"] .type-scale-row__sample {
  font-family: var(--font-display);
  font-size: var(--text-h3);
  letter-spacing: -0.025em;
  line-height: 1.15;
}

.type-scale-row[data-role="reading"] .type-scale-row__sample {
  font-size: var(--text-reading);
  line-height: 1.7;
}

.type-scale-row[data-role="body"] .type-scale-row__sample {
  font-size: var(--text-base);
  line-height: 1.6;
}

.type-scale-row[data-role="ui"] .type-scale-row__sample {
  font-size: var(--text-sm);
  font-weight: 700;
}

.type-scale-row[data-role="meta"] .type-scale-row__sample {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
}

.type-specimen {
  --specimen-family: var(--font-body);
  --specimen-size: 1rem;
  --specimen-mobile-size: var(--specimen-size);
  --specimen-weight: 400;
  --specimen-leading: 1.5;
  --specimen-tracking: 0em;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  display: grid;
  gap: var(--space-xl);
  padding: clamp(1.5rem, 5vw, 4rem);
}

.type-specimen__sample {
  font-family: var(--specimen-family);
  font-size: var(--specimen-size);
  font-weight: var(--specimen-weight);
  letter-spacing: var(--specimen-tracking);
  line-height: var(--specimen-leading);
  margin: 0;
  overflow-wrap: anywhere;
}

.type-specimen__details {
  border-top: 1px solid var(--color-border);
  color: var(--color-text-muted);
  display: flex;
  flex-wrap: wrap;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  gap: var(--space-md);
  padding-top: var(--space-md);
}

.type-guidance {
  display: grid;
  gap: var(--space-sm);
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.type-guidance article {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
}

.type-guidance strong {
  display: block;
  margin-bottom: var(--space-xs);
}

.type-guidance p {
  color: var(--color-text-muted);
  margin: 0;
}

.spacing-row {
  align-items: center;
  display: grid;
  gap: var(--space-md);
  grid-template-columns: 5rem 1fr;
}

.spacing-block {
  background: var(--color-accent);
  height: 1rem;
  width: var(--size);
}

.voice-principles {
  display: grid;
  gap: var(--space-md);
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.voice-principle,
.voice-context,
.voice-example {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
}

.voice-principle strong {
  display: block;
  font-family: var(--font-display);
  font-size: var(--text-h3);
  font-weight: 400;
  margin-bottom: var(--space-xs);
}

.voice-principle p,
.voice-context p,
.voice-example p {
  color: var(--color-text-muted);
  margin: 0;
}

.voice-contexts {
  display: grid;
  gap: var(--space-sm);
}

.voice-context {
  align-items: baseline;
  display: grid;
  gap: var(--space-md);
  grid-template-columns: minmax(7rem, 0.25fr) 1fr;
}

.voice-context strong {
  font-size: var(--text-sm);
}

.voice-comparison {
  display: grid;
  gap: var(--space-md);
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.voice-example[data-example="use"] {
  border-top: 4px solid var(--color-accent);
}

.voice-example[data-example="avoid"] {
  border-top: 4px solid var(--color-danger);
}

.voice-example blockquote {
  font-family: var(--font-display);
  font-size: var(--text-h3);
  line-height: 1.25;
  margin: var(--space-md) 0;
}

.voice-sequence {
  counter-reset: voice-step;
  display: grid;
  gap: var(--space-sm);
  list-style: none;
  margin: 0;
  padding: 0;
}

.voice-sequence li {
  align-items: baseline;
  border-top: 1px solid var(--color-border);
  counter-increment: voice-step;
  display: grid;
  gap: var(--space-md);
  grid-template-columns: 2rem 9rem 1fr;
  padding-top: var(--space-sm);
}

.voice-sequence li::before {
  color: var(--color-accent);
  content: counter(voice-step, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
}

.voice-sequence strong {
  font-size: var(--text-sm);
}

.voice-sequence span {
  color: var(--color-text-muted);
}

.mobile-nav-rules {
  display: grid;
  gap: var(--space-md);
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.mobile-nav-rule {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  display: grid;
  gap: var(--space-xs);
  padding: var(--space-lg);
}

.mobile-nav-rule[data-rule="do"] {
  border-top: 4px solid var(--color-accent);
}

.mobile-nav-rule[data-rule="avoid"] {
  border-top: 4px solid var(--color-danger);
}

.mobile-nav-rule strong {
  font-family: var(--font-display);
  font-size: var(--text-h3);
  font-weight: 400;
}

.mobile-nav-rule p,
.mobile-breadcrumb-message p {
  color: var(--color-text-muted);
  margin: 0;
}

.mobile-nav-sequence {
  display: grid;
  gap: 1px;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  overflow: hidden;
}

.mobile-nav-sequence span {
  align-items: center;
  background: var(--color-surface-subtle);
  display: flex;
  font-size: var(--text-xs);
  font-weight: 700;
  min-height: 5rem;
  padding: var(--space-sm);
  position: relative;
}

.mobile-nav-sequence span + span::before {
  color: var(--color-accent);
  content: "→";
  left: -0.35rem;
  position: absolute;
}

.mobile-breadcrumb-message {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  display: none;
  gap: var(--space-xs);
  padding: var(--space-lg);
}

.preview-frame[data-preview-width="mobile"] portfolio-breadcrumbs {
  display: none;
}

.preview-frame[data-preview-width="mobile"] .mobile-breadcrumb-message {
  display: grid;
}

.source-panel {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-top: var(--space-lg);
  overflow: hidden;
}

.source-panel summary {
  cursor: pointer;
  font-size: var(--text-sm);
  font-weight: 700;
  padding: var(--space-md);
}

.source-toolbar {
  align-items: center;
  border-top: 1px solid var(--color-border);
  display: flex;
  justify-content: space-between;
  padding: var(--space-xs) var(--space-md);
}

.source-toolbar span {
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
}

.source-toolbar button,
.controls-heading button {
  background: transparent;
  border: 0;
  color: var(--color-accent);
  font-size: var(--text-xs);
  font-weight: 700;
}

.source-panel pre {
  background: #151a17;
  color: #e9eee8;
  margin: 0;
  max-height: 22rem;
  overflow: auto;
  padding: var(--space-lg);
}

.source-panel code {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
}

.controls-panel {
  background: var(--color-surface);
  border-left: 1px solid var(--color-border);
  min-height: calc(100vh - 5rem);
  padding: var(--space-xl) var(--space-lg);
}

.controls-heading {
  align-items: center;
  display: flex;
  justify-content: space-between;
  margin-bottom: var(--space-xl);
}

.control-field {
  display: grid;
  gap: var(--space-xs);
  margin-bottom: var(--space-lg);
}

.control-field label,
.control-field legend {
  font-size: var(--text-xs);
  font-weight: 700;
}

.control-field input[type="text"],
.control-field select {
  background: var(--color-canvas);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  min-height: 2.5rem;
  padding: 0 var(--space-sm);
  width: 100%;
}

.control-field input[type="range"] {
  accent-color: var(--color-accent);
  width: 100%;
}

.control-field output {
  color: var(--color-text-muted);
  float: right;
  font-family: var(--font-mono);
  font-weight: 400;
}

.control-checkbox {
  align-items: center;
  display: flex;
  gap: var(--space-xs);
}

.control-checkbox input {
  height: 1rem;
  width: 1rem;
}

.controls-note {
  border-top: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: var(--text-xs);
  margin-top: var(--space-xl);
  padding-top: var(--space-lg);
}

.copy-toast {
  background: var(--color-text);
  border-radius: var(--radius-pill);
  bottom: var(--space-lg);
  color: var(--color-canvas);
  font-size: var(--text-sm);
  left: 50%;
  opacity: 0;
  padding: var(--space-sm) var(--space-lg);
  pointer-events: none;
  position: fixed;
  transform: translate(-50%, 1rem);
  transition: var(--duration-base) var(--ease-standard);
  z-index: 100;
}

.copy-toast.is-visible {
  opacity: 1;
  transform: translate(-50%, 0);
}

.sidebar-scrim {
  background: rgb(0 0 0 / 50%);
  display: none;
  inset: 0;
  position: fixed;
  z-index: 15;
}

@media (max-width: 1050px) {
  .explorer {
    grid-template-columns: 1fr;
  }

  .explorer-sidebar {
    box-shadow: var(--shadow-overlay);
    left: 0;
    max-width: 19rem;
    position: fixed;
    transform: translateX(-105%);
    transition: transform var(--duration-base) var(--ease-standard);
    width: 88vw;
  }

  body.sidebar-visible .explorer-sidebar {
    transform: translateX(0);
  }

  body.sidebar-visible .sidebar-scrim {
    display: block;
  }

  .sidebar-open,
  .sidebar-close {
    display: inline-flex;
  }
}

@media (max-width: 820px) {
  .explorer-workspace {
    grid-template-columns: 1fr;
  }

  .controls-panel {
    border-left: 0;
    border-top: 1px solid var(--color-border);
    min-height: 0;
  }

  .preview-column {
    padding: var(--space-md);
  }

  .segmented-control {
    display: none;
  }

  .voice-principles,
  .voice-comparison,
  .mobile-nav-rules,
  .type-guidance {
    grid-template-columns: 1fr;
  }

  .voice-context,
  .voice-sequence li {
    grid-template-columns: 1fr;
  }

  .mobile-nav-sequence {
    grid-template-columns: 1fr;
  }

  .mobile-nav-sequence span {
    min-height: 3.5rem;
  }

  .mobile-nav-sequence span + span::before {
    content: "↓";
    left: 50%;
    top: -0.75rem;
  }

  .type-scale-row {
    grid-template-columns: 1fr;
    gap: var(--space-xs);
  }
}

@container story (max-width: 600px) {
  .voice-principles,
  .voice-comparison,
  .mobile-nav-rules,
  .type-guidance {
    grid-template-columns: 1fr;
  }

  .voice-context,
  .voice-sequence li {
    grid-template-columns: 1fr;
  }

  .mobile-nav-sequence {
    grid-template-columns: 1fr;
  }

  .mobile-nav-sequence span {
    min-height: 3.5rem;
  }

  .mobile-nav-sequence span + span::before {
    content: "↓";
    left: 50%;
    top: -0.75rem;
  }

  .type-scale-row {
    grid-template-columns: 1fr;
    gap: var(--space-xs);
  }
}

@container story (max-width: 480px) {
  .type-specimen__sample {
    font-size: var(--specimen-mobile-size);
  }
}