:root {
    --font-ui: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    --font-mono: "Cascadia Code", "Cascadia Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
    --space-1: .25rem;
    --space-2: .5rem;
    --space-3: .75rem;
    --space-4: 1rem;
    --space-5: 1.5rem;
    --space-6: 2rem;
    --radius-small: 4px;
    --radius-medium: 7px;
}

* {
    box-sizing: border-box;
}

html {
    min-width: 19rem;
    background: var(--surface-root);
}

body {
    margin: 0;
    min-height: 100vh;
    color: var(--text-primary);
    background-color: var(--surface-root);
    background-image: linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
    background-size: 2rem 2rem;
    font-family: var(--font-ui);
    line-height: 1.55;
}

a {
    color: var(--primary-hover);
}

a:hover {
    color: var(--focus);
}

button, input, select, textarea {
    font: inherit;
}

button, a {
    -webkit-tap-highlight-color: transparent;
}

:focus-visible {
    outline: 2px solid var(--focus);
    outline-offset: 3px;
}

::selection {
    color: var(--primary-ink);
    background: var(--focus);
}

.shell {
    min-height: 100vh;
    display: grid;
    grid-template-columns: 15rem minmax(0, 1fr);
}

.shell-nav {
    position: sticky;
    top: 0;
    height: 100vh;
    padding: var(--space-5) var(--space-4);
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    overflow: hidden;
    background: var(--surface-nav);
    border-right: 1px solid var(--border-subtle);
}

.brand {
    display: grid;
    gap: .1rem;
    color: var(--text-primary);
    text-decoration: none;
}

.brand span {
    color: var(--primary-hover);
    font-family: var(--font-mono);
    font-size: .82rem;
    text-transform: uppercase;
    letter-spacing: .15em;
}

.brand strong {
    font-size: 1.18rem;
}

.nav-subtitle, .nav-footer {
    margin: 0;
    color: var(--text-secondary);
    font-size: .82rem;
}

.shell-nav nav {
    display: grid;
    gap: var(--space-1);
}

.shell-nav nav a {
    padding: .5rem .62rem;
    color: var(--text-secondary);
    border: 1px solid transparent;
    border-radius: var(--radius-small);
    text-decoration: none;
}

.shell-nav nav a:hover, .shell-nav nav a.active {
    color: var(--text-primary);
    background: var(--surface-panel);
    border-color: var(--border-subtle);
}

.sandbox-nav {
    display: grid;
    min-height: 0;
    gap: var(--space-1);
}

.sandbox-nav > p {
    margin: 0;
    color: var(--text-faint);
    font-family: var(--font-mono);
    font-size: .68rem;
    font-weight: 700;
    letter-spacing: .1em;
    text-transform: uppercase;
}

.sandbox-nav-scroll {
    max-height: min(13rem, 26vh);
    overflow-y: auto;
    overscroll-behavior: contain;
    padding-right: var(--space-1);
    scrollbar-gutter: stable;
}

.sandbox-nav-scroll a {
    font-size: .8rem;
    overflow-wrap: anywhere;
}

.system-nav {
    padding-top: var(--space-2);
    border-top: 1px solid var(--border-subtle);
}

.language-switch {
    display: flex;
    gap: var(--space-2);
}

.language-switch a {
    padding: .35rem .55rem;
    color: var(--text-primary);
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-small);
    font-family: var(--font-mono);
    font-size: .76rem;
    text-decoration: none;
}

.theme-toggle {
    display: flex;
    width: 100%;
    min-height: 2.35rem;
    align-items: center;
    gap: var(--space-2);
    padding: .48rem .62rem;
    color: var(--text-primary);
    text-align: left;
    background: var(--surface-raised);
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-small);
    font-size: .76rem;
}

.theme-toggle span:first-child {
    color: var(--primary-hover);
    font-size: 1rem;
}

.rail-log-console {
    display: grid;
    min-height: 0;
    gap: var(--space-1);
    padding: var(--space-2);
    background: var(--surface-input);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-small);
}

:root[data-log-console="hidden"] .rail-log-console {
    display: none;
}

.rail-log-console > header {
    display: flex;
    justify-content: space-between;
    gap: var(--space-2);
    color: var(--text-secondary);
    font-family: var(--font-mono);
    font-size: .66rem;
    text-transform: uppercase;
    letter-spacing: .06em;
}

.rail-log-records {
    height: 8.5rem;
    min-height: 6.5rem;
    max-height: min(24rem, 42vh);
    overflow: auto;
    resize: vertical;
    scrollbar-gutter: stable;
    overflow-anchor: auto;
}

.rail-log-entry {
    display: grid;
    gap: .15rem;
    padding: .32rem 0 .4rem;
    border-bottom: 1px solid var(--border-subtle);
    font-family: var(--font-mono);
    font-size: .64rem;
}

.rail-log-meta {
    display: grid;
    grid-template-columns: auto auto minmax(0, 1fr);
    gap: .35rem;
    align-items: baseline;
    color: var(--text-faint);
}

.rail-log-meta span:last-child {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.rail-log-entry p, .rail-log-empty {
    margin: 0;
    color: var(--text-secondary);
    overflow-wrap: anywhere;
}

.rail-log-entry.log-trace .rail-log-meta {
    color: var(--log-trace);
}

.rail-log-entry.log-debug .rail-log-meta {
    color: var(--log-debug);
}

.rail-log-entry.log-information .rail-log-meta {
    color: var(--log-information);
}

.rail-log-entry.log-warning .rail-log-meta {
    color: var(--log-warning);
}

.rail-log-entry.log-error .rail-log-meta {
    color: var(--log-error);
}

.rail-log-entry.log-critical .rail-log-meta {
    color: var(--log-critical);
}

.nav-footer {
    margin-top: auto;
    display: grid;
    gap: .4rem;
}

.nav-footer p {
    margin: 0;
}

.nav-footer a {
    width: fit-content;
    color: var(--primary-hover);
    font-family: var(--font-mono);
    font-size: .75rem;
}

.shell-content {
    min-width: 0;
    display: flex;
    min-height: 100vh;
    flex-direction: column;
}

.package-shell-content {
    height: 100vh;
    overflow: hidden;
}

.package-shell-content main {
    min-height: 0;
}

main {
    width: calc(100% - 2rem);
    margin: 0 1rem;
    padding: 3.5rem 0 5rem;
    flex: 1;
}

footer {
    display: flex;
    justify-content: space-between;
    gap: var(--space-4);
    padding: var(--space-4) var(--space-5);
    color: var(--text-faint);
    border-top: 1px solid var(--border-subtle);
    font-family: var(--font-mono);
    font-size: .75rem;
}

h1, h2, h3 {
    margin-top: 0;
    line-height: 1.16;
}

h1 {
    letter-spacing: -.035em;
}

p {
    max-width: 78ch;
}

.eyebrow {
    margin: 0 0 var(--space-2);
    color: var(--primary-hover);
    font-family: var(--font-mono);
    font-size: .74rem;
    font-weight: 700;
    letter-spacing: .14em;
    text-transform: uppercase;
}

.mono, code, pre {
    font-family: var(--font-mono);
}

.muted {
    color: var(--text-secondary);
}

.hero, .page-heading, .package-header {
    margin-bottom: var(--space-6);
}

.hero {
    display: grid;
    gap: var(--space-5);
}

.hero h1 {
    max-width: none;
    margin: 0;
    font-size: clamp(2.35rem, 5vw, 4.8rem);
}

.page-heading h1 {
    max-width: 18ch;
    margin: 0 0 var(--space-4);
    font-size: clamp(2.35rem, 6vw, 4.8rem);
}

.hero-details {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: var(--space-6);
    align-items: end;
}

.hero-copy, .page-heading > p:last-child, .lede {
    margin: 0;
    color: var(--text-secondary);
    font-size: 1.07rem;
    line-height: 1.7;
}

.hero-actions, .actions, .card-actions, .mode-switch {
    display: flex;
    gap: var(--space-3);
    flex-wrap: wrap;
    align-items: center;
}

.hero-actions {
    justify-content: flex-end;
}

.panel, .package-card, .sandbox-frame, .guide-section, .result-panel {
    padding: var(--space-5);
    background: var(--surface-panel);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-medium);
    box-shadow: none;
}

.panel-heading, .card-meta, .package-header, .package-meta, .result-meta {
    display: flex;
    justify-content: space-between;
    gap: var(--space-4);
    align-items: flex-start;
}

.package-header {
    align-items: end;
}

.package-header h1 {
    margin-bottom: var(--space-2);
    font-size: clamp(2rem, 5vw, 3.8rem);
}

.package-meta {
    flex-direction: column;
    align-items: flex-end;
}

.metric-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: var(--space-3);
    margin-bottom: var(--space-5);
}

.metric {
    min-height: 6rem;
    padding: var(--space-4);
    background: var(--surface-panel);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-small);
}

.metric strong {
    display: block;
    font-family: var(--font-mono);
    font-size: 1.65rem;
}

.metric span {
    color: var(--text-secondary);
    font-size: .82rem;
}

.start-panel {
    margin-bottom: var(--space-5);
    border-color: var(--border-strong);
}

.start-panel p {
    color: var(--text-secondary);
}

.filter-bar {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-2);
    margin-bottom: var(--space-4);
    color: var(--text-secondary);
    font-size: .82rem;
}

.filter-count {
    margin-left: auto;
    font-family: var(--font-mono);
}

.package-browser {
    min-width: 0;
}

.package-section {
    display: grid;
    gap: var(--space-3);
}

.package-section-heading {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-3);
}

.package-section-heading h2 {
    margin: 0;
    font-size: 1rem;
}

.coming-soon-section {
    margin-top: var(--space-5);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-medium);
    background: var(--surface-panel-translucent);
}

.coming-soon-section > summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-3);
    padding: var(--space-4) var(--space-5);
    color: var(--text-primary);
    font-weight: 750;
    cursor: pointer;
    list-style: none;
}

.coming-soon-section > summary::-webkit-details-marker {
    display: none;
}

.coming-soon-section > summary::before {
    content: "+";
    width: 1.25rem;
    color: var(--primary-hover);
    font-family: var(--font-mono);
}

.coming-soon-section[open] > summary::before {
    content: "−";
}

.coming-soon-content {
    padding: 0 var(--space-5) var(--space-5);
    border-top: 1px solid var(--border-subtle);
}

.coming-soon-content .package-grid {
    padding-top: var(--space-4);
}

.package-list-scroll {
    max-height: clamp(20rem, 40vh, 30rem);
    overflow-y: auto;
    overscroll-behavior: contain;
    padding-right: var(--space-2);
    scrollbar-gutter: stable;
}

.filter-button, button.secondary {
    padding: .46rem .7rem;
    color: var(--text-primary);
    background: var(--surface-raised);
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-small);
}

.filter-button.is-selected {
    color: var(--primary-ink);
    background: var(--primary);
    border-color: var(--primary);
}

.mode-button.is-selected {
    color: var(--primary-ink);
    background: var(--primary);
    border-color: var(--primary);
}

.package-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(17rem, 1fr));
    gap: var(--space-4);
}

.package-card {
    display: flex;
    min-height: 19rem;
    flex-direction: column;
}

.package-card.planned {
    border-style: dashed;
}

.package-card h2 {
    margin: var(--space-4) 0 var(--space-3);
    font-size: 1.08rem;
    overflow-wrap: anywhere;
}

.package-card h2 a {
    color: var(--text-primary);
    text-decoration: none;
}

.package-card > p {
    color: var(--text-secondary);
    flex: 1;
}

.card-meta {
    color: var(--text-faint);
    font-size: .75rem;
    text-transform: uppercase;
    letter-spacing: .06em;
}

.card-facts, .panel dl, .structured-fields {
    display: grid;
    grid-template-columns: minmax(7rem, .35fr) minmax(0, 1fr);
    gap: .45rem var(--space-4);
    margin: var(--space-3) 0;
}

.card-facts dt, .panel dt, .structured-fields dt {
    color: var(--text-secondary);
}

.card-facts dd, .panel dd, .structured-fields dd {
    margin: 0;
    overflow-wrap: anywhere;
}

.card-actions {
    justify-content: space-between;
    margin-top: var(--space-4);
}

.text-link {
    font-weight: 700;
}

.state-badge, .run-status {
    display: inline-flex;
    width: max-content;
    align-items: center;
    gap: .4rem;
    padding: .24rem .48rem;
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-small);
    font-family: var(--font-mono);
    font-size: .72rem;
    font-weight: 700;
    text-transform: uppercase;
}

.state-badge.is-available, .run-status.status-success {
    color: var(--success);
}

.state-badge.is-planned, .run-status.status-expectedfailure, .run-status.status-rejected {
    color: var(--warning);
}

.state-badge.is-failed, .run-status.status-internalfailure {
    color: var(--danger);
}

.run-status.status-cancelled, .run-status.status-timedout {
    color: var(--info);
}

.button-link, button.primary-action {
    display: inline-flex;
    width: max-content;
    min-height: 2.45rem;
    padding: .62rem .9rem;
    align-items: center;
    justify-content: center;
    color: var(--primary-ink);
    background: var(--primary);
    border: 1px solid var(--primary);
    border-radius: var(--radius-small);
    font-weight: 750;
    text-decoration: none;
    cursor: pointer;
}

.button-link:hover, button.primary-action:hover {
    color: var(--primary-ink);
    background: var(--primary-hover);
    border-color: var(--primary-hover);
}

.button-link.secondary-link {
    color: var(--text-primary);
    background: var(--surface-raised);
    border-color: var(--border-strong);
}

button {
    cursor: pointer;
}

button:disabled {
    opacity: .55;
    cursor: not-allowed;
}

.package-layout {
    display: grid;
    grid-template-columns: minmax(0, 1.25fr) minmax(16rem, .75fr);
    gap: var(--space-4);
    align-items: start;
}

.package-layout > *, .package-workbench > *, .stack, .sample-picker, .sample-grid {
    min-width: 0;
}

.package-page {
    display: grid;
    height: 100%;
    min-width: 0;
    min-height: 0;
    grid-template-rows: auto minmax(0, 1fr);
}

.package-workbench {
    display: grid;
    min-height: 0;
    grid-template-columns: minmax(12rem, 18rem) minmax(20rem, 1fr) minmax(18rem, 30rem);
    gap: var(--space-4);
    align-items: stretch;
}

.package-samples-column, .package-sandbox-column, .package-guide-column {
    min-width: 0;
    min-height: 0;
    overflow-y: auto;
    overscroll-behavior: contain;
    padding-right: var(--space-2);
    scrollbar-gutter: stable;
}

.package-sandbox-column > *, .sandbox-frame, .sandbox-frame > *, .guide-section > * {
    min-width: 0;
    max-width: 100%;
}

.sandbox-frame {
    width: 100%;
}

.package-samples-column {
    display: grid;
    align-content: start;
    gap: var(--space-3);
}

.package-samples-column .sample-picker {
    position: static;
    min-height: 0;
    overflow: hidden;
}

.package-samples-column .sample-grid {
    grid-template-columns: minmax(0, 1fr);
    max-height: 18rem;
    overflow-y: auto;
    padding-right: var(--space-2);
    scrollbar-gutter: stable;
}

.package-samples-column .sample-option {
    min-height: 0;
}

.stack, .guide, .timeline, .diagnostics {
    display: grid;
    gap: var(--space-4);
}

.facts-rail {
    position: sticky;
    top: var(--space-4);
}

.facts-panel {
    min-width: 0;
}

.field-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-4);
}

.checkbox-field input[type="checkbox"] {
    width: 1.15rem;
    height: 1.15rem;
}

.scripting-options {
    margin-top: var(--space-4);
}

.licensing-editor {
    display: grid;
    gap: var(--space-3);
}

.editor-section {
    display: block;
}

.generated-license {
    display: grid;
    gap: var(--space-3);
    margin-top: var(--space-4);
}

.generated-license > h3, .generated-license > p {
    margin: 0;
}

.generated-license > p {
    color: var(--text-secondary);
}

.field {
    display: grid;
    gap: .4rem;
}

.field.full {
    grid-column: 1 / -1;
}

label {
    color: var(--text-secondary);
    font-size: .8rem;
    font-weight: 700;
}

input, select, textarea {
    width: 100%;
    padding: .66rem .72rem;
    color: var(--text-primary);
    background: var(--surface-input);
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-small);
}

textarea {
    min-height: 15rem;
    resize: vertical;
    font-family: var(--font-mono);
    line-height: 1.5;
    tab-size: 4;
}

textarea.compact-editor {
    min-height: 7rem;
}

.showcase-monaco-editor {
    display: grid;
    gap: .4rem;
}

.showcase-monaco-surface {
    width: 100%;
    height: 15rem;
    min-height: 15rem;
    overflow: hidden;
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-small);
}

input:focus, select:focus, textarea:focus {
    border-color: var(--focus);
    outline: 2px solid var(--focus);
    outline-offset: 1px;
}

.sample-picker {
    overflow: hidden;
}

.sample-picker > summary h2 {
    margin: 0;
    font-size: 1.18rem;
}

.sample-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--space-2);
    max-height: 15rem;
    overflow-y: auto;
    overscroll-behavior: contain;
    padding-right: var(--space-2);
    scrollbar-gutter: stable;
}

.sample-option {
    display: grid;
    min-width: 0;
    min-height: 4.5rem;
    gap: .3rem;
    padding: var(--space-3);
    color: var(--text-primary);
    text-align: left;
    white-space: normal;
    overflow-wrap: anywhere;
    background: var(--surface-input);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-small);
}

.sample-option span {
    color: var(--text-secondary);
    font-size: .86rem;
}

.sample-option.is-selected {
    border-color: var(--primary);
    background: var(--surface-raised);
}

.sample-description {
    margin: 0;
    color: var(--text-secondary);
    font-size: .86rem;
}

.result-headline {
    margin: var(--space-3) 0;
    font-size: 1.25rem;
    font-weight: 750;
}

.status-border-success {
    border-color: var(--success);
}

.status-border-expectedfailure, .status-border-rejected {
    border-color: var(--warning);
}

.status-border-internalfailure {
    border-color: var(--danger);
}

.status-border-cancelled, .status-border-timedout {
    border-color: var(--info);
}

.collapsible-support {
    flex: 0 0 auto;
    padding: 0;
    overflow: hidden;
}

.collapsible-support > summary, .guide-more > summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-2);
    padding: .7rem var(--space-3);
    color: var(--text-primary);
    font-weight: 750;
    cursor: pointer;
    list-style: none;
}

.collapsible-support > summary::-webkit-details-marker, .guide-more > summary::-webkit-details-marker {
    display: none;
}

.collapsible-support > summary::before, .guide-more > summary::before {
    content: "+";
    color: var(--primary-hover);
    font-family: var(--font-mono);
}

.collapsible-support[open] > summary::before, .guide-more[open] > summary::before {
    content: "−";
}

.collapsible-support-content {
    padding: var(--space-3);
    border-top: 1px solid var(--border-subtle);
}

.collapsible-support-content > :first-child {
    margin-top: 0;
}

.collapsible-support-content > :last-child {
    margin-bottom: 0;
}

.tip-panel {
    border-left: 3px solid var(--primary);
}

.tip-panel ul {
    max-height: 11rem;
    margin: 0;
    padding-left: 1.15rem;
    overflow-y: auto;
    color: var(--text-secondary);
    font-size: .8rem;
}

.tip-panel li + li {
    margin-top: .35rem;
}

.progress-panel .progress-timeline {
    max-height: 9rem;
    margin: 0;
    padding-left: 1.2rem;
    font-size: .78rem;
}

.progress-panel .progress-timeline li {
    padding-left: 0;
}

.progress-panel .progress-timeline li span {
    display: block;
    min-width: 0;
    margin: 0;
}

.progress-panel .progress-timeline li + li {
    margin-top: .45rem;
}

.diagnostic, [class^="diagnostic-"] {
    padding: var(--space-3);
    background: var(--surface-input);
    border-left: 3px solid var(--info);
    overflow-wrap: anywhere;
}

.diagnostic-warning {
    border-left-color: var(--warning);
}

.diagnostic-error {
    border-left-color: var(--danger);
}

.timeline-item {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    gap: var(--space-4);
    color: var(--text-secondary);
}

.progress-timeline {
    max-height: 12rem;
    overflow: auto;
    padding-left: 1.5rem;
}

.progress-timeline li {
    padding-left: var(--space-1);
    color: var(--text-secondary);
}

.progress-timeline li + li {
    margin-top: var(--space-2);
}

.progress-timeline li span:first-child {
    display: inline-block;
    min-width: 5.5rem;
    margin-right: var(--space-2);
    color: var(--text-primary);
}

.code-block, pre {
    max-width: 100%;
    min-width: 0;
    overflow: auto;
    margin: 0;
    padding: var(--space-4);
    color: var(--text-primary);
    background: var(--surface-code);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-small);
    line-height: 1.55;
}

.code-block {
    overflow: hidden;
}

.code-block > pre {
    width: 100%;
    max-width: 100%;
    min-width: 0;
    overflow-x: auto;
    white-space: pre;
}

.code-block code {
    display: block;
    width: max-content;
    min-width: 100%;
}

.code-title {
    margin-bottom: var(--space-2);
    color: var(--text-secondary);
    font-size: .78rem;
}

.code-assist, .completion-wrap {
    position: relative;
}

.code-assist {
    display: grid;
    gap: var(--space-2);
}

.code-assist-toolbar {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: var(--space-2) var(--space-3);
}

.code-assist-toolbar-actions {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: var(--space-2);
    margin-left: auto;
}

.code-assist-toggle, .code-assist-action {
    padding: .35rem .55rem;
    font-size: .76rem;
    white-space: nowrap;
}

.completion-list {
    position: absolute;
    z-index: 30;
    top: calc(100% + var(--space-1));
    right: 0;
    left: 0;
    max-height: 16rem;
    overflow: auto;
    background: var(--surface-nav);
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-small);
}

.completion-item {
    display: grid;
    width: 100%;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: var(--space-3);
    padding: .62rem .7rem;
    color: var(--text-primary);
    text-align: left;
    background: transparent;
    border: 0;
    border-bottom: 1px solid var(--border-subtle);
    border-radius: 0;
}

.completion-item.is-selected {
    background: var(--surface-raised);
}

.guide-section p, .boundaries-panel li, .compact-list li {
    max-width: 78ch;
    color: var(--text-secondary);
}

.compact-list {
    padding-left: 1.2rem;
}

.package-guide-column > .guide {
    gap: var(--space-3);
}

.package-guide-column > .guide, .package-guide-column > .guide > *, .package-guide-column .guide-section, .guide-more-content, .guide-more-content > * {
    min-width: 0;
    max-width: 100%;
}

.package-guide-column .guide-section {
    padding: var(--space-4);
    overflow: hidden;
}

.package-guide-column .guide-section-embedded {
    padding: 0;
    overflow: visible;
    background: transparent;
    border: 0;
    border-radius: 0;
}

.guide-primary {
    overflow: hidden;
}

.guide-primary .guide-section-embedded > :first-child {
    margin-top: 0;
}

.guide-primary .guide-section-embedded > :last-child {
    margin-bottom: 0;
}

.guide-more {
    width: 100%;
    max-width: 100%;
    min-width: 0;
    overflow: hidden;
    background: var(--surface-raised);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-medium);
}

.guide-more-content {
    display: grid;
    gap: var(--space-2);
    padding: 0 var(--space-2) var(--space-2);
}

.guide-more[open] .guide-more-content {
    padding-top: var(--space-2);
    border-top: 1px solid var(--border-subtle);
}

.guide-section-compact {
    padding: var(--space-3) !important;
    background: var(--surface-panel);
}

.guide-section-compact h2 {
    margin-bottom: var(--space-2);
    font-size: .98rem;
}

.guide-section-compact p {
    margin: 0;
    font-size: .8rem;
    line-height: 1.45;
}

.guide-section-compact .code-block {
    margin-top: var(--space-2);
    font-size: .76rem;
}

.system-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-4);
}

.system-wide {
    grid-column: 1 / -1;
}

.feature-toggles {
    display: grid;
    gap: var(--space-3);
}

.feature-toggles h2 {
    margin: 0;
}

.feature-toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-5);
    padding: var(--space-3);
    background: var(--surface-input);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-small);
}

.feature-toggle span {
    display: grid;
    gap: .2rem;
}

.feature-toggle small {
    color: var(--text-secondary);
    font-weight: 400;
}

.feature-toggle input {
    width: 1.25rem;
    height: 1.25rem;
    flex: 0 0 auto;
}

.table-scroll {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th, td {
    padding: .65rem .7rem;
    text-align: left;
    border-bottom: 1px solid var(--border-subtle);
}

th {
    color: var(--text-secondary);
    font-size: .78rem;
    text-transform: uppercase;
    letter-spacing: .06em;
}

@media (max-width: 62rem) {
    .shell {
        grid-template-columns: 1fr;
    }

    .shell-nav {
        position: static;
        width: auto;
        height: auto;
        padding: var(--space-3) var(--space-4);
        display: grid;
        grid-template-columns: 1fr auto;
        gap: var(--space-2) var(--space-4);
        border-right: 0;
        border-bottom: 1px solid var(--border-subtle);
        overflow: visible;
    }

    .nav-subtitle, .nav-footer {
        display: none;
    }

    .shell-nav nav {
        grid-column: 1 / -1;
        display: flex;
    }

    .primary-nav, .sandbox-nav, .system-nav, .theme-toggle, .rail-log-console {
        grid-column: 1 / -1;
    }

    .sandbox-nav-scroll {
        max-height: none;
        overflow-x: auto;
        overflow-y: hidden;
    }

    .sandbox-nav-scroll a {
        flex: 0 0 auto;
    }

    .language-switch {
        grid-column: 2;
        grid-row: 1;
    }

    .rail-log-records {
        max-height: 18rem;
    }

    .facts-rail {
        position: static;
    }

    .package-shell-content {
        height: auto;
        overflow: visible;
    }

    .package-page {
        display: block;
        height: auto;
    }

    .package-workbench {
        grid-template-columns: 1fr;
    }

    .package-samples-column, .package-sandbox-column, .package-guide-column {
        overflow: visible;
        padding-right: 0;
    }

    .package-samples-column .sample-picker {
        min-height: 0;
        overflow: hidden;
    }

    .package-samples-column .sample-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        max-height: 18rem;
        overflow-y: auto;
        padding-right: var(--space-2);
        scrollbar-gutter: stable;
    }

    .package-guide-column {
        grid-column: auto;
    }

    .package-guide-column > .guide {
        grid-template-columns: 1fr;
    }

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

@media (max-width: 48rem) {
    main {
        width: min(100% - 2rem, 96rem);
        padding-top: 2rem;
    }

    .hero-details, .package-header, .package-layout, .system-grid {
        grid-template-columns: 1fr;
    }

    .hero-actions {
        justify-content: flex-start;
    }

    .package-meta {
        align-items: flex-start;
    }

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

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

    .field.full, .system-wide {
        grid-column: auto;
    }

    .filter-count {
        width: 100%;
        margin-left: 0;
    }

    footer {
        flex-direction: column;
    }
}

@media (max-width: 30rem) {
    .metric-grid {
        grid-template-columns: 1fr;
    }

    .shell-nav nav {
        overflow-x: auto;
    }

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

    .card-facts, .panel dl, .structured-fields {
        grid-template-columns: 1fr;
    }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        scroll-behavior: auto !important;
        transition-duration: .01ms !important;
        animation-duration: .01ms !important;
        animation-iteration-count: 1 !important;
    }
}