@font-face {
    font-family: Plex Sans;
    src: url("fonts/ibm-plex-sans.woff2") format("woff2");
    font-style: normal;
    font-weight: 100 900;
    font-display: swap;
}
@font-face {
    font-family: Plex Mono;
    src: url("fonts/ibm-plex-mono-regular.woff2") format("woff2");
    font-style: normal;
    font-weight: 400;
    font-display: swap;
}
@font-face {
    font-family: Plex Mono;
    src: url("fonts/ibm-plex-mono-medium.woff2") format("woff2");
    font-style: normal;
    font-weight: 500;
    font-display: swap;
}
@font-face {
    font-family: Plex Mono;
    src: url("fonts/ibm-plex-mono-semibold.woff2") format("woff2");
    font-style: normal;
    font-weight: 600;
    font-display: swap;
}
:root {
    --background: #fafbfc;
    --surface: #ffffff;
    --surface-raised: #f0f2f5;
    --text: #14181f;
    --muted: #57616f;
    --line: #d6dce3;
    --accent: #084bdb;
    --accent-surface: #edf2ff;
    --on-accent: #ffffff;
    --dark: #f4f6f8;
    --dark-muted: #57616f;
    --deny: #a52231;
    --ask: #825411;
    --pass: #216842;
    --off: #6c4d36;
    --sans: "Plex Sans", Arial, sans-serif;
    --mono: "Plex Mono", monospace;
    color-scheme: light;
}
:root[data-theme="dark"] {
    --background: #111419;
    --surface: #171b22;
    --surface-raised: #202631;
    --text: #eef1f6;
    --muted: #a9b3c2;
    --line: #333c4a;
    --accent: #9bbdff;
    --accent-surface: #202e48;
    --on-accent: #0c1b36;
    --dark: #151a22;
    --dark-muted: #a9b3c2;
    --deny: #ffadb4;
    --ask: #efca82;
    --pass: #9ed8b5;
    --off: #d8b99f;
    color-scheme: dark;
}
* {
    box-sizing: border-box;
}
html {
    scroll-behavior: smooth;
    scroll-padding-top: 1.5rem;
}
body {
    margin: 0;
    background: var(--background);
    color: var(--text);
    font-family: var(--sans);
    font-size: 1rem;
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
}
a {
    color: inherit;
    text-underline-offset: 0.22em;
}
button {
    font: inherit;
    cursor: pointer;
}
[hidden] {
    display: none !important;
}
button,
a,
summary {
    -webkit-tap-highlight-color: transparent;
}
img {
    max-width: 100%;
    height: auto;
}
figure,
p,
h1,
h2,
h3 {
    margin: 0;
}
h1,
h2,
h3 {
    font-weight: 500;
    line-height: 1.12;
    letter-spacing: -0.04em;
}
h2 {
    font-size: clamp(1.75rem, 2.6vw, 2.5rem);
}
h3 {
    font-size: 1.3rem;
    letter-spacing: -0.02em;
}
code,
kbd {
    font-family: var(--mono);
    font-size: 0.85em;
}
pre {
    margin: 0;
    overflow-x: auto;
}
::selection {
    background: var(--accent);
    color: var(--on-accent);
}
:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 5px;
}
.wrap {
    width: calc(100% - 7rem);
    max-width: 82rem;
    margin-inline: auto;
}
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}
.skip-link {
    position: absolute;
    z-index: 10;
    top: 1rem;
    left: 1rem;
    transform: translateY(-200%);
    background: var(--accent);
    color: var(--on-accent);
    padding: 0.7rem 1rem;
}
.skip-link:focus {
    transform: none;
}
.site-header {
    min-height: 5.5rem;
    display: flex;
    align-items: center;
    gap: 2rem;
    border-bottom: 1px solid var(--line);
}
.brand {
    display: inline-flex;
    align-items: center;
    gap: 0.65rem;
    text-decoration: none;
    flex-shrink: 0;
}
.brand strong {
    font-size: 1.35rem;
    font-weight: 600;
    letter-spacing: -0.045em;
}
.header-nav {
    display: flex;
    align-items: center;
    gap: 1.8rem;
    font-size: 0.875rem;
    margin-left: auto;
}
.header-nav a {
    text-decoration: none;
    padding-block: 0.7rem;
}
.header-nav a:hover,
.header-nav a[aria-current] {
    color: var(--accent);
    text-decoration: underline;
}
.theme-toggle {
    color: var(--muted);
    font-size: 0.75rem;
    white-space: nowrap;
    background: transparent;
    border: 1px solid var(--line);
    border-radius: 3px;
    padding: 0.55rem 0.7rem;
}
.theme-toggle:hover {
    color: var(--text);
    border-color: var(--muted);
}
.theme-toggle[aria-pressed="true"] {
    color: var(--accent);
    background: var(--accent-surface);
}
.eyebrow,
.edition,
.section-kicker,
.step-index {
    font-family: var(--mono);
    font-size: 0.75rem;
    line-height: 1.6;
}
.eyebrow,
.edition {
    color: var(--muted);
}
.edition {
    text-decoration: none;
}
.hero-grid {
    display: grid;
    grid-template-columns: 0.85fr 1.45fr;
    gap: 3.5rem;
    align-items: center;
    padding: 4rem 0 3rem;
}
.hero h1 {
    font-size: clamp(3.25rem, 5.4vw, 4.9rem);
    font-weight: 500;
    line-height: 1.06;
    letter-spacing: -0.055em;
}
.hero-summary {
    color: var(--muted);
    max-width: 26rem;
    font-size: 1.2rem;
    line-height: 1.5;
    margin-top: 1.8rem;
}
.hero-actions {
    display: flex;
    align-items: center;
    gap: 0.9rem;
    flex-wrap: wrap;
    margin-top: 2rem;
}
.hero-note {
    color: var(--muted);
    font-size: 0.875rem;
    margin-top: 1.6rem;
}
.product-preview {
    min-width: 0;
}
.product-preview img {
    display: block;
    width: 100%;
    border: 1px solid var(--line);
    border-radius: 4px;
}
.product-preview figcaption {
    font-size: 0.7rem;
    color: var(--muted);
    margin-top: 0.65rem;
    text-align: right;
}
.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--accent);
    color: var(--on-accent);
    border: 1px solid var(--accent);
    border-radius: 3px;
    padding: 0.8rem 1.2rem;
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
}
.button:hover {
    filter: brightness(0.9);
}
.button-secondary {
    background: transparent;
    color: var(--text);
    border-color: var(--line);
}
.button-secondary:hover {
    background: var(--surface-raised);
    filter: none;
}
.text-link {
    display: inline-flex;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--accent);
    text-decoration: none;
}
.text-link:hover {
    text-decoration: underline;
}
.showcase {
    border: 1px solid var(--line);
    border-radius: 3px;
}
.showcase > summary {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.85rem 1rem;
    cursor: pointer;
    list-style: none;
    font-size: 0.85rem;
}
.showcase > summary::-webkit-details-marker {
    display: none;
}
.showcase > summary:hover {
    color: var(--accent);
}
.showcase-play {
    color: var(--text);
}
.showcase[open] > summary .showcase-play {
    transform: rotate(90deg);
}
.showcase-duration {
    color: var(--muted);
    font-size: 0.75rem;
    white-space: nowrap;
    margin-left: auto;
}
.showcase-body {
    max-width: 60rem;
    margin: 0 auto;
    padding: 1rem;
}
.showcase video {
    display: block;
    width: 100%;
    height: auto;
    aspect-ratio: 16 / 9;
    background: #111;
    border: 1px solid var(--line);
    border-radius: 3px;
}
.showcase-caption {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 0.5rem 1.5rem;
    margin-top: 0.85rem;
    color: var(--muted);
    font-size: 0.8rem;
}
.showcase-caption p {
    flex: 1 1 24rem;
}
.showcase-caption > a {
    white-space: nowrap;
}
.showcase-transcript {
    margin-top: 0.75rem;
    color: var(--muted);
    font-size: 0.8rem;
}
.showcase-transcript > summary {
    cursor: pointer;
    width: fit-content;
}
.showcase-transcript ol {
    max-width: 48rem;
    padding-left: 1.25rem;
}
.showcase-transcript li + li {
    margin-top: 0.6rem;
}
.showcase-transcript strong {
    color: var(--text);
    font-weight: 500;
}
.start-section {
    display: grid;
    grid-template-columns: 0.85fr 1.45fr;
    gap: 3.5rem;
    padding-block: 2.75rem;
}
.research-intro > p {
    color: var(--muted);
    max-width: 29rem;
    margin-top: 1rem;
}
.research-intro .text-link {
    margin-top: 1rem;
}
.small-note {
    font-size: 0.8rem;
}
.terminal {
    background: var(--surface);
    color: var(--text);
    border: 1px solid var(--line);
    border-radius: 3px;
    min-width: 0;
}
.terminal-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    padding: 0.9rem 1.5rem;
    border-bottom: 1px solid var(--line);
    font: 0.75rem/1.6 var(--mono);
    color: var(--muted);
}
.terminal-bar h2 {
    font: inherit;
    letter-spacing: 0;
}
.terminal-bar button {
    font: inherit;
    background: transparent;
    border: 0;
    color: var(--accent);
    padding: 0.35rem 0;
}
.terminal-bar button:hover {
    text-decoration: underline;
}
.terminal pre {
    padding: 1.2rem 1.5rem;
    font-size: 1rem;
    line-height: 2;
}
.terminal pre code {
    font-size: 0.875rem;
}
.copy-status {
    font-size: 0.8rem;
    color: var(--muted);
}
.copy-status:not(:empty) {
    margin-top: 0.5rem;
}
.install-detail {
    font-size: 0.8rem;
    color: var(--muted);
    margin-top: 0.75rem;
    overflow-wrap: anywhere;
}
.start-section > div > .text-link {
    margin-top: 0.6rem;
    font-size: 0.8rem;
}
.principles {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    padding-block: 2rem;
    border-block: 1px solid var(--line);
}
.principles > div {
    padding-inline: 2rem;
}
.principles > div:first-child {
    padding-left: 0;
}
.principles > div:last-child {
    padding-right: 0;
}
.principles > div + div {
    border-left: 1px solid var(--line);
}
.principles h2 {
    font-size: 1.05rem;
    letter-spacing: -0.015em;
}
.principles p {
    color: var(--muted);
    font-size: 0.9rem;
    margin-top: 0.6rem;
    max-width: 20rem;
}
.chat-install {
    display: grid;
    grid-template-columns: 0.85fr 1.45fr;
    gap: 3.5rem;
    padding-block: 3.5rem;
}
.chat-install h2 {
    margin-block: 0.75rem 1rem;
}
.chat-install > div > p:not(.eyebrow) {
    color: var(--muted);
    max-width: 25rem;
}
.chat-install .button {
    margin-top: 1.5rem;
}
.install-steps {
    padding: 0;
    margin: 0;
    list-style: none;
}
.install-steps li {
    display: flex;
    gap: 1.5rem;
    padding-block: 1rem;
    border-bottom: 1px solid var(--line);
}
.install-steps li:first-child {
    padding-top: 0;
}
.install-steps li > span {
    font: 0.75rem/1.8 var(--mono);
    color: var(--muted);
}
.install-steps strong {
    font-weight: 500;
}
.install-steps p {
    font-size: 0.9rem;
    color: var(--muted);
    margin-top: 0.3rem;
}
.install-steps b {
    font-weight: 500;
}
.reference-demos {
    padding-bottom: 2.5rem;
}
.reference-detail {
    border-top: 1px solid var(--line);
}
.reference-detail:last-child {
    border-bottom: 1px solid var(--line);
}
.reference-detail > summary {
    cursor: pointer;
    padding: 1.3rem 0;
    font-weight: 500;
}
.reference-detail > summary > span {
    float: right;
    font-weight: 400;
    font-size: 0.85rem;
    color: var(--muted);
}
.reference-detail > summary:hover {
    color: var(--accent);
}
.reference-detail .wrap {
    width: 100%;
}
.guard-section {
    padding-block: 1rem 2rem;
}
.section-kicker {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    color: var(--muted);
}
.section-heading {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: start;
    margin: 1.5rem 0 2rem;
}
.section-heading > p {
    color: var(--muted);
    max-width: 34rem;
}
.noscript-note {
    margin-top: 1rem;
}
.table-scroll {
    overflow-x: auto;
}
.site-footer {
    display: flex;
    align-items: center;
    gap: 2rem;
    padding-block: 2rem;
    border-top: 1px solid var(--line);
}
.site-footer > p {
    color: var(--muted);
    font-size: 0.8rem;
}
.site-footer nav {
    margin-left: auto;
    display: flex;
    gap: 1.5rem;
    font-size: 0.8rem;
}
.site-footer nav a {
    text-decoration: none;
}
.site-footer nav a:hover {
    text-decoration: underline;
}
.noscript-note {
    margin-top: 1rem;
}
.guard-controls {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.5rem;
    border: 1px solid var(--line);
    border-bottom: 0;
    background: var(--surface);
}
.guard-controls button {
    border: 1px solid transparent;
    background: transparent;
    color: var(--muted);
    padding: 0.7rem 1rem;
    font-size: 0.9rem;
}
.guard-controls button[aria-selected="true"] {
    background: var(--dark);
    color: var(--text);
}
.guard-controls button span {
    font: 0.65rem/1.5 var(--mono);
    margin-left: 0.5rem;
    color: var(--muted);
}
.guard-controls button[aria-selected="true"] span {
    color: var(--accent);
}
.guard-current {
    font: 0.75rem var(--mono);
    margin-left: auto;
    margin-right: 1rem;
    color: var(--muted);
}
.guard-panel {
    border: 1px solid var(--line);
    background: var(--surface);
}
.guard-panel > p {
    padding: 1.25rem 1.5rem;
    color: var(--muted);
    font-size: 0.9rem;
    min-height: 5.5rem;
}
.table-scroll {
    overflow-x: auto;
}
.guard-table {
    border-collapse: collapse;
    width: 100%;
    text-align: left;
    font-size: 0.85rem;
}
.guard-table th {
    font: 400 0.7rem/1.5 var(--mono);
    color: var(--muted);
    background: var(--surface-raised);
}
.guard-table th,
.guard-table td {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--line);
}
.guard-table code {
    font-size: 0.75rem;
    overflow-wrap: anywhere;
}
.guard-table td:nth-child(2) {
    color: var(--muted);
}
.guard-table td:last-child {
    font-size: 0.8rem;
    font-weight: 500;
}
.guard-table [data-tone="deny"] {
    color: var(--deny);
}
.guard-table [data-tone="ask"] {
    color: var(--ask);
}
.guard-table [data-tone="pass"] {
    color: var(--pass);
}
.guard-table [data-tone="off"] {
    color: var(--off);
}
.guard-boundary {
    font-size: 0.8rem;
    color: var(--muted);
    margin-top: 1rem;
}
.guard-boundary a {
    margin-left: 0.3rem;
}
@media (max-width: 1100px) {
    .wrap {
        width: calc(100% - 4rem);
    }
    .site-header {
        gap: 1.25rem;
    }
    .header-nav {
        gap: 1.2rem;
    }
    .hero-grid,
    .start-section,
    .chat-install {
        gap: 2rem;
        grid-template-columns: 0.9fr 1.2fr;
    }
    .hero h1 {
        font-size: clamp(3rem, 5.2vw, 4.5rem);
    }
    .hero-summary {
        font-size: 1.05rem;
    }
    .hero-actions {
        gap: 0.65rem;
    }
    .button {
        padding: 0.75rem 1rem;
    }
}
@media (max-width: 800px) {
    .site-header {
        flex-wrap: wrap;
        gap: 0.5rem 1rem;
        padding-block: 1rem;
    }
    .header-nav {
        order: 3;
        width: 100%;
        margin: 0;
        justify-content: space-between;
        gap: 1rem;
    }
    .theme-toggle {
        margin-left: auto;
    }
    .hero-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
        padding-block: 2.5rem;
    }
    .hero h1 {
        font-size: clamp(3rem, 7vw, 4.5rem);
    }
    .hero-summary {
        max-width: 32rem;
        font-size: 1.1rem;
    }
    .hero-actions {
        margin-top: 1.5rem;
    }
    .hero-note {
        margin-top: 1rem;
    }
    .start-section,
    .chat-install {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    .research-intro > p {
        max-width: 38rem;
    }
    .principles > div {
        padding-inline: 1rem;
    }
    .principles h2 {
        line-height: 1.4;
    }
    .section-heading {
        gap: 1.5rem;
        grid-template-columns: 1fr;
    }
    .guard-table td:nth-child(2),
    .guard-table th:nth-child(2) {
        display: none;
    }
    .guard-table td,
    .guard-table th {
        padding: 0.8rem;
    }
    .guard-current {
        display: none;
    }
}
@media (max-width: 520px) {
    .wrap {
        width: calc(100% - 2.5rem);
    }
    .header-nav {
        font-size: 0.8rem;
        gap: 0.75rem;
    }
    .hero-grid {
        padding-top: 2rem;
    }
    .hero h1 {
        font-size: 3.25rem;
    }
    .hero-summary {
        margin-top: 1.25rem;
    }
    .hero-actions .button {
        font-size: 0.85rem;
    }
    .showcase > summary {
        gap: 0.55rem;
        font-size: 0.8rem;
        padding: 0.85rem;
    }
    .showcase-duration {
        font-size: 0.7rem;
    }
    .showcase-body {
        padding: 0.75rem;
    }
    .terminal-bar {
        padding: 0.75rem 1rem;
    }
    .terminal pre {
        padding: 1rem;
    }
    .terminal pre code {
        font-size: 0.7rem;
    }
    .principles {
        grid-template-columns: 1fr;
        gap: 1.25rem;
    }
    .principles > div {
        padding: 0;
    }
    .principles > div + div {
        border-left: 0;
    }
    .principles p {
        max-width: none;
    }
    .chat-install {
        padding-block: 2.5rem;
    }
    .reference-detail > summary > span {
        display: none;
    }
    .section-kicker {
        flex-direction: column;
        gap: 0.3rem;
    }
    .guard-controls button {
        padding: 0.65rem;
        font-size: 0.85rem;
    }
    .guard-panel > p {
        padding: 1rem;
    }
    .site-footer {
        flex-wrap: wrap;
        gap: 1rem;
    }
    .site-footer nav {
        width: 100%;
        margin-left: 0;
    }
}
@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }
    *,
    *::before,
    *::after {
        transition: none !important;
        animation: none !important;
    }
}
@media print {
    :root,
    :root[data-theme="dark"] {
        --background: #fff;
        --surface: #fff;
        --surface-raised: #f3f3f3;
        --text: #000;
        --muted: #333;
        --line: #aaa;
        --accent: #222;
        --accent-surface: #eee;
        --dark: #fff;
        --dark-muted: #333;
        color-scheme: light;
    }
    .theme-toggle,
    .header-nav,
    .hero-actions,
    .showcase {
        display: none !important;
    }
    .wrap {
        width: 100%;
    }
}
.product-preview .preview-panels {
    display: grid;
    grid-template-columns: 1fr 1fr;
    aspect-ratio: 1.75;
    border: 1px solid var(--line);
    border-radius: 4px;
    overflow: hidden;
}
.product-preview .preview-panels img {
    width: 100%;
    height: 100%;
    min-height: 0;
    object-fit: cover;
    border: 0;
    border-radius: 0;
}
.preview-editor {
    object-position: left top;
}
.preview-chat {
    object-position: right top;
}
/* Match the selected layout's compact opening rhythm. */
.hero-grid {
    padding-block: 3.25rem 2rem;
}
.hero-copy {
    align-self: start;
    padding-top: 2rem;
}
.start-section {
    padding-block: 2rem;
}
.terminal-bar {
    padding-block: 0.65rem;
}
.terminal pre {
    padding-block: 1rem;
    line-height: 1.85;
}
.install-options {
    font-size: 0.8rem;
    margin-top: 0.55rem;
}
.install-options > summary {
    width: fit-content;
    cursor: pointer;
    color: var(--accent);
}
.install-options .text-link {
    font-size: 0.8rem;
    margin-top: 0.5rem;
}
@media (max-width: 800px) {
    .hero-copy {
        padding-top: 0;
    }
    .hero-grid {
        padding-block: 2.5rem 2rem;
    }
}

.improvement-section {
    padding-block: 2.5rem;
    border-top: 1px solid var(--line);
}
.improvement-intro {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: start;
}
.improvement-intro h2 {
    margin: 0;
}
.improvement-intro p {
    max-width: 38rem;
    color: var(--muted);
}
.improvement-diagram {
    margin: 1.5rem 0 0;
}
.improvement-diagram picture {
    display: block;
}
.improvement-diagram img {
    display: block;
    width: 100%;
    height: auto;
    object-fit: contain;
}
.improvement-diagram figcaption {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    margin-top: 1.25rem;
    color: var(--muted);
    font-size: 0.85rem;
}
.improvement-diagram figcaption a {
    color: var(--accent);
}
.improvement-diagram [data-diagram-theme="dark"] {
    display: none;
}
[data-theme="dark"] .improvement-diagram [data-diagram-theme="light"] {
    display: none;
}
[data-theme="dark"] .improvement-diagram [data-diagram-theme="dark"] {
    display: block;
}
@media (max-width: 800px) {
    .improvement-intro {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
}
@media (max-width: 900px) {
    .improvement-diagram picture {
        max-width: 440px;
        margin-inline: auto;
    }
}
@media (max-width: 600px) {
    .improvement-diagram figcaption {
        flex-direction: column;
        gap: 0.5rem;
    }
}

.product-preview [data-preview-theme="dark"] {
    display: none;
}
[data-theme="dark"] .product-preview [data-preview-theme="light"] {
    display: none;
}
[data-theme="dark"] .product-preview [data-preview-theme="dark"] {
    display: grid;
}