:root {
    --page-bg: #f7f8f6;
    --surface: #ffffff;
    --surface-muted: #eef3f1;
    --ink: #18212b;
    --muted: #66717d;
    --line: #d8dfdc;
    --accent: #1f7668;
    --accent-strong: #15584f;
    --blue: #285f9f;
    --coral: #ba5d42;
    --gold: #9d6a16;
    --focus: #0f5fff;
    --code-bg: #17212b;
    --code-ink: #edf4f2;
    --shadow: 0 20px 60px rgba(24, 33, 43, 0.08);
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    min-width: 320px;
    margin: 0;
    background: var(--page-bg);
    color: var(--ink);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    font-size: 16px;
    line-height: 1.6;
}

button,
input {
    font: inherit;
}

button {
    cursor: pointer;
}

button:focus,
a:focus,
input:focus {
    outline: 3px solid var(--focus);
    outline-offset: 3px;
}

button:focus:not(:focus-visible),
a:focus:not(:focus-visible),
input:focus:not(:focus-visible) {
    outline: 0;
}

.skip-link {
    position: fixed;
    top: 1rem;
    left: 1rem;
    z-index: 20;
    padding: 0.625rem 0.875rem;
    border-radius: 0.375rem;
    background: var(--ink);
    color: #fff;
    transform: translateY(-150%);
}

.skip-link:focus {
    transform: translateY(0);
}

.site-shell {
    display: grid;
    grid-template-columns: minmax(15rem, 18rem) minmax(0, 1fr);
    min-height: 100vh;
}

.sidebar {
    position: sticky;
    top: 0;
    height: 100vh;
    padding: 1.5rem;
    border-right: 1px solid var(--line);
    background: #fbfcfa;
}

.brand {
    display: flex;
    align-items: center;
    gap: 0.875rem;
    margin-bottom: 2rem;
}

.brand-mark {
    display: grid;
    grid-template-columns: repeat(2, 0.875rem);
    gap: 0.25rem;
    width: 2.375rem;
    height: 2.375rem;
    padding: 0.375rem;
    border: 1px solid var(--line);
    border-radius: 0.5rem;
    background: var(--surface);
}

.brand-mark span {
    border-radius: 0.1875rem;
}

.brand-mark span:nth-child(1) {
    background: var(--accent);
}

.brand-mark span:nth-child(2) {
    background: var(--blue);
}

.brand-mark span:nth-child(3) {
    grid-column: span 2;
    background: var(--coral);
}

.brand-kicker,
.eyebrow {
    margin: 0;
    color: var(--accent-strong);
    font-size: 0.75rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.brand-name {
    margin: 0;
    font-weight: 800;
}

.nav-list {
    display: grid;
    gap: 0.25rem;
}

.nav-list a {
    display: block;
    padding: 0.625rem 0.75rem;
    border-radius: 0.375rem;
    color: var(--muted);
    font-weight: 700;
    text-decoration: none;
}

.nav-list a:hover {
    background: var(--surface-muted);
    color: var(--accent-strong);
}

.content {
    width: min(100%, 78rem);
    padding: 2rem clamp(1rem, 4vw, 3rem) 4rem;
}

.intro-section,
.demo-section,
.doc-section {
    padding: clamp(1.25rem, 3vw, 2.25rem) 0;
    border-bottom: 1px solid var(--line);
}

.intro-section {
    display: grid;
    grid-template-columns: minmax(0, 1.2fr) minmax(16rem, 0.8fr);
    gap: clamp(1.25rem, 4vw, 3rem);
    align-items: end;
    padding-top: 0;
}

h1,
h2,
h3,
p {
    overflow-wrap: break-word;
}

h1 {
    max-width: 12ch;
    margin: 0.25rem 0 1rem;
    font-size: clamp(2rem, 6vw, 4rem);
    line-height: 1;
    letter-spacing: 0;
}

h2 {
    margin: 0.25rem 0 0.75rem;
    font-size: clamp(1.55rem, 3vw, 2.25rem);
    line-height: 1.15;
    letter-spacing: 0;
}

h3 {
    margin: 0 0 0.5rem;
    font-size: 1.05rem;
    line-height: 1.3;
    letter-spacing: 0;
}

.lede {
    max-width: 42rem;
    margin: 0;
    color: var(--muted);
    font-size: 1.125rem;
}

.section-heading {
    max-width: 48rem;
    margin-bottom: 1.25rem;
}

.section-heading p:last-child {
    margin-bottom: 0;
    color: var(--muted);
}

.summary-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.75rem;
    margin: 0;
}

.summary-grid div,
.feature-grid article,
.demo-notes,
.callout {
    border: 1px solid var(--line);
    border-radius: 0.5rem;
    background: var(--surface);
}

.summary-grid div {
    padding: 1rem;
}

.summary-grid dt {
    color: var(--muted);
    font-size: 0.8rem;
    font-weight: 800;
    text-transform: uppercase;
}

.summary-grid dd {
    margin: 0.25rem 0 0;
    font-weight: 800;
}

.demo-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(16rem, 20rem);
    gap: 1rem;
    align-items: start;
}

.editor-preview {
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: 0.5rem;
    background: var(--surface);
    box-shadow: var(--shadow);
}

.editor-toolbar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem;
    padding: 0.875rem;
    border-bottom: 1px solid var(--line);
    background: #f8faf9;
}

.toolbar-dot {
    width: 0.75rem;
    height: 0.75rem;
    border-radius: 50%;
    background: var(--coral);
}

.toolbar-button {
    min-height: 2rem;
    padding: 0.3125rem 0.625rem;
    border: 1px solid var(--line);
    border-radius: 0.375rem;
    background: var(--surface);
    color: var(--muted);
    font-size: 0.875rem;
    font-weight: 700;
}

.toolbar-button.active {
    border-color: color-mix(in srgb, var(--accent), #fff 40%);
    background: var(--surface-muted);
    color: var(--accent-strong);
}

.demo-controls {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    align-items: center;
    justify-content: space-between;
    padding: 1rem;
    border-bottom: 1px solid var(--line);
}

.control-group,
.range-control {
    display: grid;
    gap: 0.5rem;
}

.control-label,
.range-control span {
    color: var(--muted);
    font-size: 0.8rem;
    font-weight: 800;
    text-transform: uppercase;
}

.segmented-control {
    display: inline-grid;
    grid-template-columns: repeat(2, minmax(5rem, 1fr));
    border: 1px solid var(--line);
    border-radius: 0.5rem;
    background: #f8faf9;
    padding: 0.25rem;
}

.segmented-control button {
    min-height: 2.25rem;
    border: 0;
    border-radius: 0.375rem;
    background: transparent;
    color: var(--muted);
    font-weight: 800;
}

.segmented-control button.is-active {
    background: var(--ink);
    color: #fff;
}

.range-control {
    min-width: min(100%, 18rem);
}

.range-control output {
    color: var(--accent-strong);
    font-weight: 800;
}

.range-control input {
    width: 100%;
    accent-color: var(--accent);
}

.demo-canvas {
    width: 100%;
    max-width: 52rem;
    padding: 1rem;
    transition: max-width 180ms ease;
}

.demo-canvas.is-narrow {
    max-width: 33rem;
}

.adaptive-doc-widget {
    --widget-surface: #fff;
    --widget-surface-muted: #eef3f1;
    --widget-ink: #17212b;
    --widget-muted: #5d6b78;
    --widget-line: #d8e0e7;
    --widget-accent: #1f7668;
    --widget-accent-strong: #16584f;

    overflow: hidden;
    border: 1px solid var(--widget-line);
    border-radius: 0.5rem;
    background: var(--widget-surface);
    color: var(--widget-ink);
}

.adaptive-doc-widget [hidden] {
    display: none !important;
}

.adaptive-doc-widget__tabs {
    display: none;
}

.adaptive-doc-widget__panel + .adaptive-doc-widget__panel {
    border-top: 1px solid var(--widget-line);
}

.adaptive-doc-widget__heading {
    margin: 0;
    font-size: 1rem;
}

.adaptive-doc-widget__accordion-button,
.adaptive-doc-widget__tab {
    min-height: 3.25rem;
    border: 0;
    background: transparent;
    color: var(--widget-ink);
    font: inherit;
    font-weight: 800;
}

.adaptive-doc-widget__accordion-button {
    position: relative;
    width: 100%;
    padding: 0.875rem 3rem 0.875rem 1rem;
    text-align: left;
}

.adaptive-doc-widget__accordion-button::after {
    content: "";
    position: absolute;
    top: 50%;
    right: 1.25rem;
    width: 0.625rem;
    height: 0.625rem;
    border-right: 2px solid currentColor;
    border-bottom: 2px solid currentColor;
    transform: translateY(-65%) rotate(45deg);
}

.adaptive-doc-widget__accordion-button.is-expanded::after {
    transform: translateY(-35%) rotate(225deg);
}

.adaptive-doc-widget__accordion-button:hover,
.adaptive-doc-widget__tab:hover {
    background: var(--widget-surface-muted);
    color: var(--widget-accent-strong);
}

.adaptive-doc-widget__content {
    padding: 0 1rem 1rem;
    color: var(--widget-muted);
}

.adaptive-doc-widget__content > :last-child {
    margin-bottom: 0;
}

.adaptive-doc-widget--tabs.is-tabs > .adaptive-doc-widget__tabs {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 8rem), 1fr));
    border-bottom: 1px solid var(--widget-line);
    background: #f8fafb;
}

.adaptive-doc-widget--tabs.is-tabs > .adaptive-doc-widget__tabs > .adaptive-doc-widget__tab {
    min-width: 0;
    padding: 0.875rem;
    border-right: 1px solid var(--widget-line);
}

.adaptive-doc-widget--tabs.is-tabs > .adaptive-doc-widget__tabs > .adaptive-doc-widget__tab:last-child {
    border-right: 0;
}

.adaptive-doc-widget--tabs.is-tabs > .adaptive-doc-widget__tabs > .adaptive-doc-widget__tab.is-selected {
    color: var(--widget-accent-strong);
    background: var(--widget-surface);
    box-shadow: inset 0 4px 0 var(--widget-accent);
}

.adaptive-doc-widget--tabs.is-tabs > .adaptive-doc-widget__panels > .adaptive-doc-widget__panel > .adaptive-doc-widget__heading {
    display: none;
}

.adaptive-doc-widget--tabs.is-tabs > .adaptive-doc-widget__panels > .adaptive-doc-widget__panel + .adaptive-doc-widget__panel {
    border-top: 0;
}

.adaptive-doc-widget--tabs.is-tabs > .adaptive-doc-widget__panels > .adaptive-doc-widget__panel > .adaptive-doc-widget__content {
    min-height: 8rem;
    padding: 1.5rem;
}

.demo-status {
    margin: 0;
    padding: 0.875rem 1rem 1rem;
    border-top: 1px solid var(--line);
    color: var(--muted);
    font-weight: 700;
}

.demo-notes {
    padding: 1.25rem;
}

.demo-notes ul,
.step-list {
    margin: 0;
    padding-left: 1.25rem;
}

.demo-notes li + li,
.step-list li + li {
    margin-top: 0.5rem;
}

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

.feature-grid article {
    padding: 1.25rem;
}

.feature-grid p,
.demo-notes li,
.step-list li,
.callout p {
    color: var(--muted);
}

.callout {
    padding: 1rem 1.25rem;
    border-left: 4px solid var(--gold);
}

.callout p {
    margin: 0;
}

.code-block {
    overflow: hidden;
    border-radius: 0.5rem;
    background: var(--code-bg);
    color: var(--code-ink);
}

.code-header {
    display: flex;
    gap: 0.75rem;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.14);
}

.code-header span {
    font-weight: 800;
}

.code-header button {
    min-height: 2.25rem;
    padding: 0.375rem 0.75rem;
    border: 1px solid rgba(255, 255, 255, 0.24);
    border-radius: 0.375rem;
    background: transparent;
    color: #fff;
    font-weight: 800;
}

.code-header button:hover {
    background: rgba(255, 255, 255, 0.1);
}

pre {
    overflow-x: auto;
    margin: 0;
    padding: 1rem;
}

code {
    font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
    font-size: 0.9rem;
}

.compatibility-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.compatibility-list span {
    padding: 0.625rem 0.875rem;
    border: 1px solid var(--line);
    border-radius: 0.375rem;
    background: var(--surface);
    color: var(--muted);
    font-weight: 800;
}

@media (max-width: 980px) {
    .site-shell {
        display: block;
    }

    .sidebar {
        position: static;
        height: auto;
        border-right: 0;
        border-bottom: 1px solid var(--line);
    }

    .nav-list {
        display: flex;
        overflow-x: auto;
        padding-bottom: 0.25rem;
    }

    .nav-list a {
        flex: 0 0 auto;
    }

    .intro-section,
    .demo-layout,
    .feature-grid {
        grid-template-columns: 1fr;
    }

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

@media (max-width: 640px) {
    .content {
        padding-inline: 1rem;
    }

    .summary-grid,
    .demo-controls {
        grid-template-columns: 1fr;
    }

    .summary-grid {
        display: grid;
    }

    .demo-controls {
        display: grid;
        align-items: stretch;
    }

    .segmented-control {
        width: 100%;
    }

    .demo-canvas {
        padding: 0.75rem;
    }

    .code-header {
        align-items: flex-start;
        flex-direction: column;
    }
}