/* EUI — the public site.
 *
 * Hand-written: no framework, no build step, no npm. The page is an
 * engineering drawing of a protocol, so it is built out of rules,
 * dimension lines and measured type, and everything on it is a number
 * that exists in the repository.
 */

:root {
    color-scheme: light dark;

    --paper: #f4f6f3;
    --paper-sunk: #eceff0;
    --ink: #12171b;
    --ink-soft: #4b565e;
    --rule: #c3ccd1;
    --rule-faint: #dde3e5;
    --blue: #1f35d6;
    --amber: #a96a00;
    --rose: #b32a55;
    --green: #2f6b3a;
    --scrim: rgba(18, 23, 27, 0.4);

    --measure: 34rem;
    --rail: 8.5rem;
    --step: clamp(3.5rem, 7vw, 6.5rem);

    --serif: "Instrument Serif", "Iowan Old Style", Georgia, serif;
    --sans: "IBM Plex Sans", system-ui, -apple-system, sans-serif;
    --mono: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, monospace;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --paper: #0e1216;
        --paper-sunk: #141a20;
        --ink: #e6eaec;
        --ink-soft: #93a1ab;
        --rule: #27333c;
        --rule-faint: #1b232a;
        --blue: #8b9bff;
        --amber: #e0a33a;
        --rose: #ff819e;
        --green: #7fc08d;
        --scrim: rgba(230, 234, 236, 0.16);
    }
}

:root[data-theme="dark"] {
    --paper: #0e1216;
    --paper-sunk: #141a20;
    --ink: #e6eaec;
    --ink-soft: #93a1ab;
    --rule: #27333c;
    --rule-faint: #1b232a;
    --blue: #8b9bff;
    --amber: #e0a33a;
    --rose: #ff819e;
    --green: #7fc08d;
    --scrim: rgba(230, 234, 236, 0.16);
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    -webkit-text-size-adjust: 100%;
}

body {
    margin: 0;
    background: var(--paper);
    color: var(--ink);
    font-family: var(--sans);
    font-size: 16px;
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img {
    max-width: 100%;
}

a {
    color: inherit;
    text-decoration-color: var(--rule);
    text-underline-offset: 0.2em;
}

a:hover {
    text-decoration-color: var(--blue);
}

/* A link inside prose has to look like one: the nav, the two hero actions and
   the footer all set their own colour below, so this only reaches the text. */
p a {
    color: var(--blue);
    text-decoration-color: currentColor;
}

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

/* ---------------------------------------------------------------- shell */

.sheet {
    max-width: 68rem;
    margin: 0 auto;
    padding: 0 1.5rem 6rem;
    position: relative;
}

/* The drawing's spine: one hairline the whole page hangs from. */
.sheet::before {
    content: "";
    position: absolute;
    top: 0;
    bottom: 6rem;
    left: calc(1.5rem + var(--rail) - 1.5rem);
    width: 1px;
    background: var(--rule-faint);
}

@media (max-width: 60rem) {
    .sheet::before {
        display: none;
    }
}

.top {
    display: flex;
    align-items: baseline;
    gap: 1.25rem;
    padding: 1.75rem 0 1.25rem;
    border-bottom: 1px solid var(--rule);
    flex-wrap: wrap;
}

.wordmark {
    font-family: var(--mono);
    font-weight: 500;
    font-size: 0.95rem;
    letter-spacing: 0.16em;
    text-transform: uppercase;
}

.wordmark b {
    color: var(--blue);
    font-weight: 500;
}

.top nav {
    margin-left: auto;
    display: flex;
    gap: 1.5rem;
    font-family: var(--mono);
    font-size: 0.8rem;
    letter-spacing: 0.06em;
}

.top nav a {
    text-decoration: none;
    color: var(--ink-soft);
}

.top nav a:hover {
    color: var(--ink);
}

.tagline {
    font-family: var(--mono);
    font-size: 0.8rem;
    color: var(--ink-soft);
    letter-spacing: 0.04em;
}

/* --------------------------------------------------------------- section */

section {
    display: grid;
    grid-template-columns: var(--rail) minmax(0, 1fr);
    gap: 0 2.5rem;
    padding-top: var(--step);
}

@media (max-width: 60rem) {
    section {
        grid-template-columns: minmax(0, 1fr);
        gap: 0;
    }
}

.mark {
    font-family: var(--mono);
    font-size: 0.75rem;
    letter-spacing: 0.1em;
    color: var(--ink-soft);
    text-transform: uppercase;
    padding-top: 0.6rem;
    position: relative;
}

.mark span {
    display: block;
    color: var(--blue);
}

.mark::after {
    content: "";
    position: absolute;
    top: 1.1rem;
    right: -2.5rem;
    width: 2.5rem;
    height: 1px;
    background: var(--rule);
}

@media (max-width: 60rem) {
    .mark {
        padding: 0 0 0.75rem;
    }

    .mark::after {
        display: none;
    }
}

h1,
h2,
h3 {
    font-family: var(--serif);
    font-weight: 400;
    letter-spacing: -0.01em;
    text-wrap: balance;
    margin: 0;
}

h1 {
    font-size: clamp(2.75rem, 6.5vw, 4.75rem);
    line-height: 1.02;
}

h2 {
    font-size: clamp(1.9rem, 3.6vw, 2.75rem);
    line-height: 1.1;
    margin-bottom: 1rem;
}

h3 {
    font-size: 1.3rem;
    line-height: 1.25;
    margin-bottom: 0.35rem;
}

p {
    max-width: var(--measure);
    margin: 0 0 1.1rem;
}

.lede {
    font-size: 1.2rem;
    line-height: 1.5;
    max-width: 38rem;
}

.soft {
    color: var(--ink-soft);
}

strong {
    font-weight: 600;
}

code {
    font-family: var(--mono);
    font-size: 0.9em;
    color: var(--blue);
}

/* ------------------------------------------------------------------ hero */

.hero {
    padding-top: 3.5rem;
}

.hero h1 em {
    font-style: normal;
    color: var(--blue);
}

.hero .lede {
    margin-top: 1.5rem;
}

.actions {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
    margin-top: 2rem;
    font-family: var(--mono);
    font-size: 0.85rem;
}

.actions a {
    text-decoration: none;
    padding: 0.55rem 1.1rem;
    border: 1px solid var(--rule);
    color: var(--ink);
}

.actions a:first-child {
    background: var(--ink);
    color: var(--paper);
    border-color: var(--ink);
}

.actions a:hover {
    border-color: var(--blue);
    color: var(--blue);
}

.actions a:first-child:hover {
    background: var(--blue);
    border-color: var(--blue);
    color: #fff;
}

/* ------------------------------------------------------------ the bytes */

.frame {
    margin-top: 3.5rem;
    border-top: 1px solid var(--rule);
    padding-top: 1.25rem;
}

.frame-head {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 1rem;
    font-family: var(--mono);
    font-size: 0.75rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--ink-soft);
    margin-bottom: 1rem;
}

.bytes {
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem 0.75rem;
    font-family: var(--mono);
    font-size: clamp(0.85rem, 1.9vw, 1.15rem);
    line-height: 1.2;
}

.field {
    display: inline-flex;
    flex-direction: column;
    gap: 0.3rem;
    padding: 0.15rem 0.3rem 0.35rem;
    border-bottom: 2px solid currentColor;
    cursor: default;
    animation: settle 0.5s cubic-bezier(0.2, 0, 0, 1) both;
}

.field .hex {
    letter-spacing: 0.06em;
    color: var(--ink);
}

.field .name {
    font-size: 0.6rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    white-space: nowrap;
}

.field.on {
    background: var(--paper-sunk);
}

.f-frame {
    color: var(--blue);
}

.f-len {
    color: var(--ink-soft);
}

.f-op {
    color: var(--green);
}

.f-num {
    color: var(--amber);
}

.f-text {
    color: var(--rose);
}

@keyframes settle {
    from {
        opacity: 0;
        transform: translateY(0.4rem);
    }
}

@media (prefers-reduced-motion: reduce) {
    .field {
        animation: none;
    }
}

.reads {
    margin-top: 1.75rem;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(13rem, 1fr));
    gap: 1.25rem 2rem;
    border-top: 1px solid var(--rule-faint);
    padding-top: 1.25rem;
}

.read {
    font-size: 0.9rem;
    line-height: 1.45;
}

.read b {
    font-family: var(--mono);
    font-weight: 500;
    font-size: 0.75rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    display: block;
    margin-bottom: 0.15rem;
}

.read.on b {
    color: var(--blue);
}

/* --------------------------------------------------------- the cell drawn */

.result {
    margin-top: 2.5rem;
    display: flex;
    align-items: center;
    gap: 1.5rem;
    flex-wrap: wrap;
    font-family: var(--mono);
}

.leader {
    flex: 1 1 6rem;
    height: 1px;
    background: repeating-linear-gradient(90deg, var(--rule) 0 6px, transparent 6px 12px);
    min-width: 3rem;
}

.cell {
    border: 1px solid var(--rule);
    background: var(--paper-sunk);
    padding: 0.7rem 1.1rem;
    display: flex;
    gap: 2.5rem;
    align-items: baseline;
}

.cell .label {
    font-size: 0.7rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--ink-soft);
}

.cell .value {
    font-size: 1.15rem;
    font-variant-numeric: tabular-nums;
}

/* ------------------------------------------------------------ dimensions */

.dims {
    margin: 0;
    padding: 0;
    list-style: none;
    display: grid;
    gap: 1.5rem;
    max-width: 44rem;
}

.dim {
    display: grid;
    grid-template-columns: 8.5rem minmax(0, 1fr);
    gap: 0 1.25rem;
    align-items: baseline;
}

.dim dt {
    font-family: var(--mono);
    font-size: 1.05rem;
    font-variant-numeric: tabular-nums;
    color: var(--blue);
    position: relative;
    padding-left: 0.85rem;
}

/* A dimension tick, as on a drawing. */
.dim dt::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0.15em;
    bottom: 0.15em;
    width: 1px;
    background: var(--blue);
}

.dim dd {
    margin: 0;
    font-size: 0.95rem;
}

.dim dd small {
    display: block;
    color: var(--ink-soft);
    font-size: 0.8rem;
    font-family: var(--mono);
}

@media (max-width: 34rem) {
    .dim {
        grid-template-columns: minmax(0, 1fr);
        gap: 0.15rem;
    }
}

/* ----------------------------------------------------------------- scale */

.scale {
    margin-top: 2rem;
    max-width: 44rem;
}

.bar {
    display: grid;
    grid-template-columns: 4.5rem minmax(0, 1fr) 5rem;
    gap: 0 1rem;
    align-items: center;
    margin-bottom: 0.7rem;
    font-family: var(--mono);
    font-size: 0.8rem;
}

.bar .track {
    height: 1.5rem;
    border-left: 1px solid var(--rule);
    /* A span is inline: the fill needs a box before a width means anything. */
    display: block;
}

.bar .fill {
    display: block;
    height: 100%;
    background: var(--blue);
}

.bar.html .fill {
    background: var(--rule);
}

.bar .amount {
    font-variant-numeric: tabular-nums;
    white-space: nowrap;
    text-align: right;
    color: var(--ink-soft);
}

.bar.eui .amount {
    color: var(--ink);
}

.note {
    font-family: var(--mono);
    font-size: 0.78rem;
    color: var(--ink-soft);
    border-top: 1px solid var(--rule-faint);
    padding-top: 0.75rem;
    margin-top: 1.25rem;
    max-width: 44rem;
}

/* ----------------------------------------------------------------- flow */

.flow {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(11rem, 1fr));
    gap: 1px;
    background: var(--rule-faint);
    border: 1px solid var(--rule-faint);
    margin-top: 1.5rem;
    max-width: 48rem;
}

.stage {
    background: var(--paper);
    padding: 1.1rem 1.15rem 1.35rem;
}

.stage b {
    font-family: var(--mono);
    font-size: 0.72rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--blue);
    display: block;
    margin-bottom: 0.5rem;
}

.stage p {
    margin: 0;
    font-size: 0.9rem;
    line-height: 1.5;
}

/* ---------------------------------------------------------------- refusals */

.refusals {
    list-style: none;
    margin: 1.5rem 0 0;
    padding: 0;
    max-width: 44rem;
}

.refusals li {
    display: grid;
    grid-template-columns: 1.5rem minmax(0, 1fr);
    gap: 0 0.75rem;
    padding: 0.7rem 0;
    border-top: 1px solid var(--rule-faint);
    font-size: 0.95rem;
}

.refusals li::before {
    content: "×";
    font-family: var(--mono);
    color: var(--rose);
    line-height: 1.6;
}

.refusals cite {
    font-family: var(--mono);
    font-style: normal;
    font-size: 0.75rem;
    color: var(--ink-soft);
    letter-spacing: 0.04em;
}

/* ------------------------------------------------------------------ table */

.ledger {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1.5rem;
    font-size: 0.92rem;
    max-width: 48rem;
}

.ledger th,
.ledger td {
    text-align: left;
    padding: 0.6rem 1rem 0.6rem 0;
    border-bottom: 1px solid var(--rule-faint);
    vertical-align: baseline;
}

.ledger th {
    font-family: var(--mono);
    font-size: 0.72rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--ink-soft);
    font-weight: 500;
    border-bottom-color: var(--rule);
}

.ledger td:last-child {
    font-family: var(--mono);
    font-variant-numeric: tabular-nums;
    white-space: nowrap;
    color: var(--ink-soft);
}

.ledger .yes {
    color: var(--green);
}

.ledger .no {
    color: var(--rose);
}

/* -------------------------------------------------------------- authoring */

.pair {
    display: grid;
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: 1px;
    background: var(--rule-faint);
    border: 1px solid var(--rule-faint);
    margin-top: 1.5rem;
    max-width: 52rem;
}

@media (max-width: 52rem) {
    .pair {
        grid-template-columns: minmax(0, 1fr);
    }
}

.pane {
    background: var(--paper);
    padding: 1rem 1.15rem 1.25rem;
    min-width: 0;
}

.pane pre + p {
    margin-top: 1.1rem;
    padding-top: 1.1rem;
    border-top: 1px solid var(--rule-faint);
}

.pane > b {
    font-family: var(--mono);
    font-size: 0.7rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--ink-soft);
    display: block;
    margin-bottom: 0.85rem;
}

pre {
    margin: 0;
    font-family: var(--mono);
    font-size: 0.78rem;
    line-height: 1.75;
    overflow-x: auto;
    color: var(--ink);
    tab-size: 2;
}

pre + pre {
    margin-top: 1.1rem;
    padding-top: 1.1rem;
    border-top: 1px solid var(--rule-faint);
}

pre .c {
    color: var(--ink-soft);
}

pre .k {
    color: var(--blue);
}

pre .s {
    color: var(--rose);
}

pre .n {
    color: var(--amber);
}

/* What the client draws from that code, drawn here in HTML so the page can
   show it without shipping a client. The roles are EUI's own. */
.draw {
    border: 1px solid var(--rule);
    background: var(--paper-sunk);
    padding: 1.4rem 1.5rem 1.5rem;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.9rem;
}

.draw .t {
    font-size: 1.15rem;
    font-weight: 600;
}

.draw .v {
    font-size: 2.6rem;
    line-height: 1;
    font-weight: 600;
    font-variant-numeric: tabular-nums;
}

.draw .btns {
    display: flex;
    gap: 0.5rem;
}

.draw .btn {
    font-family: var(--mono);
    font-size: 0.85rem;
    padding: 0.35rem 0.9rem;
    border-radius: 3px;
    background: var(--blue);
    color: #fff;
    border: 1px solid var(--blue);
}

.draw .btn.ghost {
    background: transparent;
    color: var(--blue);
}

.draw small {
    color: var(--ink-soft);
    font-size: 0.75rem;
    max-width: 22rem;
    line-height: 1.5;
}

.legend {
    display: flex;
    gap: 1.25rem;
    flex-wrap: wrap;
    margin-top: 1rem;
    font-family: var(--mono);
    font-size: 0.72rem;
    color: var(--ink-soft);
}

.legend span::before {
    content: "";
    display: inline-block;
    width: 0.6rem;
    height: 0.6rem;
    margin-right: 0.4rem;
    background: currentColor;
}

.legend .l-server {
    color: var(--blue);
}

.legend .l-local {
    color: var(--amber);
}

/* ---------------------------------------------------------------- footer */

footer {
    margin-top: var(--step);
    padding-top: 1.25rem;
    border-top: 1px solid var(--rule);
    display: flex;
    gap: 1.5rem 2.5rem;
    flex-wrap: wrap;
    font-family: var(--mono);
    font-size: 0.78rem;
    color: var(--ink-soft);
}

footer a {
    text-decoration: none;
}

footer a:hover {
    color: var(--blue);
}

/* ------------------------------------------------------- component reference
 *
 * The reference page. Same drawing language as the argument page: rules,
 * mono labels, and nothing coloured that is not carrying meaning.
 */

.wordmark {
    text-decoration: none;
}

.top nav a[aria-current="page"] {
    color: var(--ink);
}

.toc {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(13rem, 1fr));
    gap: 0 2rem;
    margin-top: 2.5rem;
    max-width: 52rem;
}

.toc a {
    padding: 0.75rem 0 0.85rem;
    border-top: 1px solid var(--rule);
    text-decoration: none;
    color: inherit;
    display: block;
}

.toc a:hover b {
    text-decoration: underline;
    text-underline-offset: 0.2em;
}

.toc b {
    display: block;
    font-family: var(--mono);
    font-size: 0.78rem;
    font-weight: 500;
    letter-spacing: 0.06em;
    color: var(--blue);
}

.toc span {
    display: block;
    font-size: 0.82rem;
    color: var(--ink-soft);
    line-height: 1.4;
}

/* The node's keys, beside the node itself. */
.keys {
    margin: 0;
    display: grid;
    grid-template-columns: 4.5rem minmax(0, 1fr);
    gap: 0.55rem 1rem;
    font-size: 0.85rem;
}

.keys dt {
    font-family: var(--mono);
    font-size: 0.8rem;
    color: var(--blue);
}

.keys dd {
    margin: 0;
    color: var(--ink-soft);
    line-height: 1.45;
}

.kinds {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr));
    gap: 0 2rem;
    margin-top: 1.25rem;
    max-width: 56rem;
}

.kinds div {
    padding: 0.6rem 0;
    border-top: 1px solid var(--rule-faint);
}

.kinds b {
    font-family: var(--mono);
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--blue);
    margin-right: 0.6rem;
}

.kinds span {
    font-size: 0.85rem;
    color: var(--ink-soft);
}

.vocab {
    width: 100%;
    max-width: 56rem;
    border-collapse: collapse;
    margin-top: 1.5rem;
    font-size: 0.88rem;
}

.vocab th {
    text-align: left;
    font-family: var(--mono);
    font-size: 0.72rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    font-weight: 500;
    color: var(--ink-soft);
    padding: 0 1.5rem 0.5rem 0;
    border-bottom: 1px solid var(--rule);
}

.vocab td {
    padding: 0.5rem 1.5rem 0.5rem 0;
    border-bottom: 1px solid var(--rule-faint);
    vertical-align: baseline;
}

.vocab td:first-child {
    font-family: var(--mono);
    font-size: 0.8rem;
    color: var(--blue);
    width: 38%;
}

.vocab td:last-child {
    color: var(--ink-soft);
}

.units {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
    gap: 1.75rem;
    margin-top: 2rem;
    max-width: 56rem;
}

.units b {
    font-family: var(--mono);
    font-size: 0.72rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--ink-soft);
    font-weight: 500;
    display: block;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--rule);
    margin-bottom: 0.6rem;
}

.units p {
    margin: 0;
    font-size: 0.88rem;
    line-height: 1.55;
}

.roles {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(17rem, 1fr));
    gap: 0 2rem;
    margin-top: 1.25rem;
    max-width: 56rem;
}

.roles div {
    padding: 0.55rem 0;
    border-top: 1px solid var(--rule-faint);
    display: flex;
    gap: 0.75rem;
    align-items: baseline;
}

.roles b {
    font-family: var(--mono);
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--blue);
    min-width: 4.5rem;
}

.roles span {
    font-family: var(--mono);
    font-size: 0.78rem;
    color: var(--ink-soft);
}

.events {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(9.5rem, 1fr));
    gap: 0 1.75rem;
    margin: 1.5rem 0 0;
    max-width: 52rem;
}

.events span {
    padding: 0.45rem 0;
    border-top: 1px solid var(--rule-faint);
    font-family: var(--mono);
    font-size: 0.76rem;
    color: var(--ink-soft);
}

/* The catalogue itself: one block per family. */
.family {
    margin-top: 2.75rem;
    max-width: 56rem;
}

.family h3 {
    display: flex;
    align-items: baseline;
    gap: 0.75rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--rule);
    margin-bottom: 0.5rem;
}

.family h3 span {
    font-family: var(--mono);
    font-size: 0.75rem;
    color: var(--ink-soft);
}

.family > p {
    font-size: 0.88rem;
    max-width: 44rem;
    margin-bottom: 0.5rem;
}

.api {
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    gap: 0;
    margin: 0;
}

.api dt {
    font-family: var(--mono);
    font-size: 0.79rem;
    line-height: 1.5;
    color: var(--ink);
    padding: 0.5rem 1.5rem 0.5rem 0;
    border-top: 1px solid var(--rule-faint);
    overflow-wrap: anywhere;
}

.api dt b {
    display: block;
    font-weight: 500;
    color: var(--ink);
}

/* The example call: a real one, so it has to read as code and not as prose. */
.api dt i {
    display: block;
    font-style: normal;
    font-size: 0.74rem;
    line-height: 1.55;
    color: var(--ink-soft);
    margin-top: 0.3rem;
    padding-left: 0.75rem;
    border-left: 2px solid var(--rule-faint);
    overflow-wrap: anywhere;
}

.api dd .d {
    display: block;
}

.api dd {
    margin: 0;
    font-size: 0.85rem;
    line-height: 1.5;
    color: var(--ink-soft);
    padding: 0.5rem 0;
    border-top: 1px solid var(--rule-faint);
}

@media (max-width: 46rem) {
    .api {
        grid-template-columns: minmax(0, 1fr);
    }

    .api dd {
        padding-top: 0;
        border-top: 0;
    }
}

.w-btn {
    font-size: 0.82rem;
    font-weight: 600;
    padding: 0.35rem 0.85rem;
    border-radius: 3px;
    border: 1px solid transparent;
}

.w-btn.primary {
    background: var(--blue);
    color: var(--paper);
}

.w-btn.secondary {
    background: var(--paper-sunk);
    color: var(--ink);
    border-color: var(--rule);
}

.w-btn.danger {
    background: var(--rose);
    color: var(--paper);
}

.w-btn.ghost {
    color: var(--blue);
}

.w-badge {
    font-size: 0.72rem;
    font-weight: 600;
    padding: 0.1rem 0.55rem;
    border-radius: 999px;
    border: 1px solid currentColor;
}

.w-badge.info {
    color: var(--blue);
}

.w-badge.success {
    color: var(--green);
}

.w-badge.warning {
    color: var(--amber);
}

.w-badge.danger {
    color: var(--rose);
}

.w-switch {
    width: 36px;
    height: 20px;
    border-radius: 999px;
    background: var(--blue);
    display: inline-flex;
    align-items: center;
    justify-content: flex-end;
    padding: 2px;
}

.w-switch i {
    width: 16px;
    height: 16px;
    border-radius: 999px;
    background: var(--paper);
}

.w-check {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
}

.w-check i {
    width: 18px;
    height: 18px;
    border-radius: 3px;
    background: var(--blue);
    position: relative;
}

.w-check i::after {
    content: "";
    position: absolute;
    left: 5px;
    top: 2px;
    width: 5px;
    height: 10px;
    border: solid var(--paper);
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

.w-progress {
    display: block;
    height: 6px;
    border-radius: 999px;
    background: var(--paper-sunk);
    border: 1px solid var(--rule-faint);
    overflow: hidden;
}

.w-progress i {
    display: block;
    height: 100%;
    width: 62%;
    background: var(--blue);
}

.w-skeleton {
    display: block;
    height: 12px;
    width: 70%;
    border-radius: 3px;
    background: var(--paper-sunk);
    border: 1px solid var(--rule-faint);
}

.w-chip {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.78rem;
    padding: 0.15rem 0.5rem 0.15rem 0.7rem;
    border-radius: 999px;
    background: var(--paper-sunk);
    border: 1px solid var(--rule);
}

.w-chip b {
    color: var(--ink-soft);
    font-weight: 400;
}

.w-stat {
    display: block;
    border: 1px solid var(--rule);
    background: var(--paper-sunk);
    border-radius: 3px;
    padding: 0.7rem 0.9rem;
}

.w-stat em {
    display: block;
    font-style: normal;
    font-family: var(--mono);
    font-size: 0.7rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--ink-soft);
}

.w-stat b {
    display: block;
    font-size: 1.5rem;
    font-weight: 600;
    line-height: 1.2;
    font-variant-numeric: tabular-nums;
}

.w-stat small {
    color: var(--ink-soft);
    font-size: 0.75rem;
}

/* ------------------------------------------------------------------ previews
 *
 * Every catalogue entry carries a small drawing of what its function makes.
 * These are HTML stand-ins: the page is a document and cannot run a client,
 * so the shapes are the widget's, the mechanism is not. A function that
 * returns a value rather than a tree shows the value instead.
 */

.p {
    margin-top: 0.7rem;
    background: var(--paper-sunk);
    border: 1px solid var(--rule-faint);
    border-radius: 3px;
    padding: 0.7rem 0.8rem;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.4rem;
    min-height: 3.1rem;
    overflow: hidden;
}

.p.col {
    flex-direction: column;
    align-items: stretch;
    justify-content: center;
}

/* A returned value, not a drawing. */
.p.val {
    font-family: var(--mono);
    font-size: 0.73rem;
    line-height: 1.5;
    color: var(--ink-soft);
    overflow-wrap: anywhere;
}

.p.val em {
    font-style: normal;
    color: var(--blue);
}

/* The drawing kit: bars, boxes, panels, text. Everything composes from these. */
.g-l {
    display: block;
    height: 7px;
    border-radius: 2px;
    background: var(--rule);
    flex: 0 0 auto;
}

.g-l.a {
    background: var(--blue);
}

.g-l.w1 { width: 24px; }
.g-l.w2 { width: 44px; }
.g-l.w3 { width: 72px; }
.g-l.w4 { width: 110px; }
.g-l.full { width: 100%; }
.g-l.tall { height: 22px; border-radius: 3px; }

.g-p {
    background: var(--paper);
    border: 1px solid var(--rule);
    border-radius: 3px;
    padding: 0.45rem 0.55rem;
    display: flex;
    gap: 0.35rem;
    min-width: 0;
}

.g-p.col {
    flex-direction: column;
    align-items: flex-start;
}

.g-r {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    min-width: 0;
}

.g-c {
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
    min-width: 0;
}

.g-t {
    font-size: 0.78rem;
    line-height: 1.3;
}

.g-t.b {
    font-weight: 600;
}

.g-m {
    font-size: 0.72rem;
    color: var(--ink-soft);
}

.g-sq {
    width: 22px;
    height: 22px;
    border-radius: 3px;
    background: var(--rule);
    flex: 0 0 auto;
}

.g-sq.a {
    background: var(--blue);
}

.g-sq.round {
    border-radius: 999px;
}

.g-sq.big {
    width: 30px;
    height: 30px;
}

.g-init {
    width: 26px;
    height: 26px;
    border-radius: 999px;
    background: var(--blue);
    color: var(--paper);
    font-size: 0.72rem;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex: 0 0 auto;
}

.g-rule {
    display: block;
    width: 100%;
    height: 1px;
    background: var(--rule);
}

.g-dgrid {
    display: flex;
    flex-direction: column;
    width: 100%;
    border: 1px solid var(--rule);
    border-radius: 4px;
    overflow: hidden;
}

.g-dgrid .g-r {
    padding: 0.2rem 0.4rem;
    gap: 0.55rem;
    border-bottom: 1px solid var(--rule-faint);
}

.g-dgrid .g-r:last-child {
    border-bottom: 0;
}

.g-dgrid .head {
    background: var(--rule-faint);
}

.g-t.hit {
    background: color-mix(in oklab, var(--blue) 18%, transparent);
    color: var(--blue);
    border-radius: 2px;
    padding: 0 0.2rem;
}

.g-in {
    display: inline-flex;
    align-items: center;
    padding: 0.2rem 0.4rem;
    border: 1px solid var(--rule);
    border-radius: 3px;
    background: var(--paper);
    font-size: 0.74rem;
    color: var(--ink-soft);
    min-width: 88px;
}

.g-cur {
    display: inline-block;
    width: 1px;
    height: 0.85em;
    background: var(--blue);
    margin-left: 1px;
}

.g-dim {
    background: var(--scrim);
    padding: 0.35rem;
    border-radius: 3px;
    display: flex;
    width: 100%;
    justify-content: center;
}

.g-grid7 {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 2px;
    width: 100%;
    max-width: 130px;
}

.g-grid7 i {
    height: 11px;
    border-radius: 2px;
    background: var(--rule-faint);
    border: 1px solid var(--rule-faint);
}

.g-grid7 i.a {
    background: var(--blue);
    border-color: var(--blue);
}

.g-grid7 i.r {
    background: var(--rule);
}

.g-chart {
    display: block;
    width: 100%;
    max-width: 150px;
    height: 46px;
}

.g-chart .ax {
    stroke: var(--rule-faint);
    stroke-width: 1;
}

.g-chart .ln {
    fill: none;
    stroke: var(--blue);
    stroke-width: 2;
    stroke-linejoin: round;
    stroke-linecap: round;
}

.g-chart .ar {
    fill: var(--rule-faint);
}

.g-chart .dt {
    fill: var(--blue);
}

.g-chart .br {
    fill: var(--blue);
}

.g-arc {
    fill: none;
    stroke-width: 9;
}

.g-spin {
    width: 16px;
    height: 16px;
    border-radius: 999px;
    border: 2px solid var(--rule);
    border-top-color: var(--blue);
    flex: 0 0 auto;
}

/* Shapes a few of the previews need on their own. */
.g-between {
    display: flex;
    width: 100%;
    align-items: center;
    justify-content: space-between;
}

.g-c.full,
.g-r.full {
    width: 100%;
}

.g-end {
    align-self: flex-end;
}

.g-stack {
    position: relative;
    width: 52px;
    height: 34px;
}

.g-stack i {
    position: absolute;
    width: 32px;
    height: 22px;
    border-radius: 3px;
    background: var(--rule);
}

.g-stack i + i {
    left: 18px;
    top: 10px;
    background: var(--blue);
}

.g-scroll {
    position: relative;
    width: 100%;
    max-width: 120px;
    padding-right: 8px;
}

.g-scroll::after {
    content: "";
    position: absolute;
    right: 0;
    top: 0;
    width: 3px;
    height: 60%;
    border-radius: 3px;
    background: var(--rule);
}

.g-clip {
    width: 100%;
    max-width: 120px;
    height: 42px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.g-clip .ghost {
    opacity: 0.35;
}

.g-img {
    width: 46px;
    height: 30px;
    border-radius: 3px;
    background: var(--rule);
    flex: 0 0 auto;
}

.g-h1 {
    font-size: 1.05rem;
    font-weight: 700;
    line-height: 1.2;
}

.g-h2 {
    font-size: 0.92rem;
    font-weight: 600;
    line-height: 1.2;
}

.w-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
}

.w-btn.icon {
    padding: 0.2rem 0.5rem;
}

.g-in.sm {
    min-width: 54px;
}

.g-slider {
    display: flex;
    align-items: center;
    width: 110px;
    height: 14px;
}

.g-slider i {
    display: block;
    height: 4px;
    border-radius: 4px;
    background: var(--blue);
    width: 45px;
}

.g-slider b {
    width: 12px;
    height: 12px;
    border-radius: 999px;
    background: var(--blue);
    border: 2px solid var(--paper);
    flex: 0 0 auto;
}

.g-slider u {
    display: block;
    height: 4px;
    border-radius: 4px;
    background: var(--rule);
    flex: 1 1 auto;
}

.g-day {
    width: 20px;
    height: 20px;
    border-radius: 3px;
    background: var(--blue);
    color: var(--paper);
    font-size: 0.68rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.g-day.blank {
    background: none;
    border: 1px dashed var(--rule);
}

.g-tabs {
    display: flex;
    gap: 0.7rem;
    font-size: 0.75rem;
    color: var(--ink-soft);
    border-bottom: 1px solid var(--rule);
    padding-bottom: 0.3rem;
}

.g-tabs b {
    font-weight: 600;
    color: var(--ink);
    border-bottom: 2px solid var(--blue);
    padding-bottom: 0.3rem;
    margin-bottom: -0.4rem;
}

.g-seg {
    display: flex;
    gap: 2px;
    padding: 2px;
    border-radius: 4px;
    background: var(--rule-faint);
    font-size: 0.72rem;
}

.g-seg span {
    padding: 0.1rem 0.4rem;
    border-radius: 3px;
    color: var(--ink-soft);
}

.g-seg span.on {
    background: var(--paper);
    color: var(--ink);
    font-weight: 600;
}

.g-tip {
    background: var(--ink);
    color: var(--paper);
    font-size: 0.7rem;
    padding: 0.15rem 0.45rem;
    border-radius: 3px;
}

.g-dim.left {
    justify-content: flex-start;
}

.g-dim.right {
    justify-content: flex-end;
}

.g-code {
    font-family: var(--mono);
    font-size: 0.68rem;
    color: var(--ink-soft);
    background: var(--paper);
    border: 1px solid var(--rule-faint);
    border-radius: 3px;
    padding: 0.35rem 0.5rem;
    width: 100%;
}

.g-toast {
    font-size: 0.74rem;
    font-weight: 600;
    color: var(--green);
    border: 1px solid var(--green);
    border-radius: 3px;
    padding: 0.25rem 0.6rem;
    background: var(--paper);
}

.g-banner {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    width: 100%;
    font-size: 0.74rem;
    color: var(--ink-soft);
    background: var(--paper);
    border-left: 3px solid var(--blue);
    padding: 0.35rem 0.5rem;
}

.g-tree {
    font-size: 0.73rem;
    color: var(--ink-soft);
    line-height: 1.6;
}

.g-tree span {
    display: block;
}

.g-tree .in {
    padding-left: 0.9rem;
}

.g-c.mid {
    align-items: center;
}

.g-chart.sm {
    max-width: 48px;
}

/* ---------------------------------------------------------------- plates
 *
 * The samples page: each application is a plate in the drawing — the render
 * itself, framed by one hairline, over a caption strip that says where the
 * thing lives. The screenshots are 2× so they hold on a retina screen; the
 * frame keeps its own aspect from the width and height attributes, so the
 * page does not reflow as they arrive.
 */

.plate {
    margin: 0 0 2rem;
    border: 1px solid var(--rule);
    background: var(--paper-sunk);
}

.plate img {
    display: block;
    width: 100%;
    height: auto;
}

.plate figcaption {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 1rem;
    flex-wrap: wrap;
    border-top: 1px solid var(--rule);
    padding: 0.55rem 0.75rem 0.6rem;
    font-family: var(--mono);
    font-size: 0.72rem;
    letter-spacing: 0.04em;
    color: var(--ink-soft);
}

/* A plate's numbers sit closer to it than a section's usually would. */
.plate + .dims {
    gap: 1.1rem;
}