@font-face {
    font-family: "IBM Plex Sans";
    src: url("../fonts/ibm-plex-sans-400.woff2") format("woff2");
    font-weight: 400;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: "IBM Plex Sans";
    src: url("../fonts/ibm-plex-sans-500.woff2") format("woff2");
    font-weight: 500;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: "IBM Plex Sans";
    src: url("../fonts/ibm-plex-sans-600.woff2") format("woff2");
    font-weight: 600;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: "IBM Plex Mono";
    src: url("../fonts/ibm-plex-mono-400.woff2") format("woff2");
    font-weight: 400;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: "IBM Plex Mono";
    src: url("../fonts/ibm-plex-mono-500.woff2") format("woff2");
    font-weight: 500;
    font-style: normal;
    font-display: swap;
}

:root {
    --void: #05060a;
    --panel: #0c1016;
    --panel-2: #121821;
    --line: #1c2430;
    --line-2: #2a3544;
    --pass: #5eead4;
    --pass-dim: rgba(94, 234, 212, 0.12);
    --drop: #fb7185;
    --drop-dim: rgba(251, 113, 133, 0.14);
    --idle: #fbbf24;
    --idle-dim: rgba(251, 191, 36, 0.12);
    --text: #d6dde6;
    --muted: #7a8696;
    --faint: #6a7684;
    --sans: "IBM Plex Sans", "Segoe UI", sans-serif;
    --mono: "IBM Plex Mono", ui-monospace, "Cascadia Code", Menlo, monospace;
    --wrap: 1080px;
    --header-h: 64px;
    --radius: 6px;
}

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

html {
    scroll-behavior: smooth;
    color-scheme: dark;
}

html,
body {
    margin: 0;
    padding: 0;
}

body {
    min-height: 100vh;
    font-family: var(--sans);
    font-size: 16.5px;
    line-height: 1.55;
    color: var(--text);
    background:
        radial-gradient(900px 480px at 50% -80px, rgba(94, 234, 212, 0.07), transparent 70%),
        radial-gradient(700px 400px at 100% 0, rgba(251, 113, 133, 0.04), transparent 55%),
        var(--void);
}

::selection {
    background: var(--pass);
    color: var(--void);
}

a {
    color: var(--pass);
    text-decoration-thickness: 1px;
    text-underline-offset: 3px;
}

a:hover {
    color: #fff;
}

img {
    max-width: 100%;
    display: block;
}

code,
kbd {
    font-family: var(--mono);
    font-size: 0.88em;
    font-weight: 400;
}

p code,
li code,
td code,
dd code,
figcaption code {
    color: var(--pass);
    background: var(--pass-dim);
    padding: 0.08em 0.35em;
    border-radius: 3px;
}

.skip {
    position: absolute;
    left: 12px;
    top: -48px;
    z-index: 80;
    padding: 8px 12px;
    background: var(--pass);
    color: var(--void);
    font-family: var(--mono);
    font-size: 13px;
    font-weight: 500;
}

.skip:focus {
    top: 12px;
}

.wrap {
    width: min(var(--wrap), calc(100% - 40px));
    margin-inline: auto;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    height: var(--header-h);
    border-bottom: 1px solid var(--line);
    background: rgba(5, 6, 10, 0.86);
    backdrop-filter: blur(12px);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--header-h);
    gap: 24px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text);
    text-decoration: none;
    font-family: var(--mono);
    font-weight: 500;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    font-size: 13px;
}

.brand img {
    width: 22px;
    height: 22px;
}

.brand:hover {
    color: var(--pass);
}

.nav-toggle {
    display: none;
    border: 1px solid var(--line-2);
    background: var(--panel);
    color: var(--text);
    font-family: var(--mono);
    font-size: 12px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    padding: 8px 12px;
    border-radius: var(--radius);
    cursor: pointer;
}

.site-nav {
    display: flex;
    align-items: center;
    gap: 4px;
}

.site-nav a {
    color: var(--muted);
    text-decoration: none;
    font-family: var(--mono);
    font-size: 12.5px;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    padding: 8px 12px;
    border-radius: var(--radius);
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
    color: var(--text);
    background: var(--panel-2);
}

.site-nav a.nav-ext {
    color: var(--pass);
    margin-left: 8px;
    border: 1px solid var(--line-2);
}

.kicker {
    margin: 0 0 12px;
    font-family: var(--mono);
    font-size: 12px;
    font-weight: 500;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--pass);
}

.display {
    margin: 0;
    font-family: var(--mono);
    font-weight: 500;
    font-size: clamp(3rem, 9vw, 6.4rem);
    letter-spacing: -0.05em;
    line-height: 0.92;
    color: #fff;
}

.lede {
    margin: 18px 0 0;
    max-width: 40rem;
    font-size: 1.15rem;
    color: var(--muted);
}

.section-lede {
    margin: 0 0 18px;
    max-width: 40rem;
    color: var(--muted);
}

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

.hero {
    padding: 72px 0 36px;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 28px;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
    border-radius: var(--radius);
    font-family: var(--mono);
    font-size: 13px;
    font-weight: 500;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    text-decoration: none;
    border: 1px solid transparent;
}

.btn-pass {
    background: var(--pass);
    color: var(--void);
}

.btn-pass:hover {
    background: #fff;
    color: var(--void);
}

.btn-ghost {
    background: transparent;
    color: var(--text);
    border-color: var(--line-2);
}

.btn-ghost:hover {
    border-color: var(--pass);
    color: var(--pass);
}

.datapath {
    margin: 28px 0 72px;
    border: 1px solid var(--line);
    background: var(--panel);
    border-radius: 10px;
    overflow: hidden;
}

.datapath-head {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 14px 16px;
    border-bottom: 1px solid var(--line);
}

.seg {
    display: inline-flex;
    padding: 3px;
    border: 1px solid var(--line-2);
    border-radius: 8px;
    background: var(--void);
}

.seg button {
    appearance: none;
    border: 0;
    background: transparent;
    color: var(--muted);
    font-family: var(--mono);
    font-size: 12px;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    padding: 8px 14px;
    border-radius: 5px;
    cursor: pointer;
}

.seg button[aria-selected="true"][data-arm="0"] {
    background: var(--idle-dim);
    color: var(--idle);
}

.seg button[aria-selected="true"][data-arm="1"] {
    background: var(--drop-dim);
    color: var(--drop);
}

.metrics {
    display: flex;
    flex-wrap: wrap;
    gap: 18px 24px;
    margin: 0;
}

.metrics div {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.metrics dt {
    font-family: var(--mono);
    font-size: 10px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--faint);
}

.metrics dd {
    margin: 0;
    font-family: var(--mono);
    font-size: 14px;
    font-variant-numeric: tabular-nums;
    color: var(--text);
}

.datapath-body {
    position: relative;
    padding: 28px 18px 22px;
    min-height: 168px;
}

.stages {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 10px 8px;
    margin: 0;
    padding: 0;
    position: relative;
    z-index: 1;
}

.stages li {
    flex: 1 1 88px;
    min-width: 88px;
    text-align: center;
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--muted);
    border: 1px solid var(--line-2);
    background: var(--void);
    border-radius: var(--radius);
    padding: 12px 8px;
    transition: opacity 0.2s, border-color 0.2s, color 0.2s;
}

.datapath[data-armed="0"] .armed-only {
    opacity: 0.28;
}

.stages .verdict.pass {
    color: var(--pass);
    border-color: rgba(94, 234, 212, 0.35);
    background: var(--pass-dim);
}

.stages .verdict.drop {
    color: var(--drop);
    border-color: rgba(251, 113, 133, 0.4);
    background: var(--drop-dim);
}

.datapath-lane {
    position: absolute;
    inset: 0;
    pointer-events: none;
    overflow: hidden;
}

.pkt {
    position: absolute;
    width: 9px;
    height: 9px;
    margin: -4.5px 0 0 -4.5px;
    border-radius: 2px;
    background: var(--pass);
    box-shadow: 0 0 12px rgba(94, 234, 212, 0.8);
    z-index: 2;
}

.pkt.is-drop {
    background: var(--drop);
    box-shadow: 0 0 12px rgba(251, 113, 133, 0.85);
}

.datapath-note {
    margin: 0;
    padding: 10px 16px 14px;
    font-family: var(--mono);
    font-size: 12px;
    color: var(--faint);
    border-top: 1px solid var(--line);
}

.section {
    padding: 28px 0 64px;
}

.section-head {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 22px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--line);
}

.section-head h2 {
    margin: 0;
    font-size: 1.35rem;
    font-weight: 600;
}

.section-head .idx {
    font-family: var(--mono);
    font-size: 12px;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--faint);
}

.facts {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 14px;
}

.fact {
    border: 1px solid var(--line);
    background: var(--panel);
    border-radius: 10px;
    padding: 20px 18px 18px;
}

.fact .tag {
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--pass);
    margin: 0 0 10px;
}

.fact h3 {
    margin: 0 0 8px;
    font-size: 1.05rem;
}

.fact p {
    margin: 0;
    color: var(--muted);
    font-size: 0.95rem;
}

.nogo {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px 28px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.nogo li {
    font-family: var(--mono);
    font-size: 14px;
    color: var(--muted);
    padding: 10px 0;
    border-bottom: 1px solid var(--line);
}

.nogo li::before {
    content: "— ";
    color: var(--faint);
}

.shield {
    list-style: none;
    margin: 0 0 8px;
    padding: 0;
    display: grid;
    gap: 10px;
}

.shield + .nogo {
    margin-top: 20px;
}

.shield > li {
    display: grid;
    grid-template-columns: 52px 1fr;
    gap: 16px;
    align-items: start;
    border: 1px solid var(--line);
    background: var(--panel);
    border-radius: 10px;
    padding: 18px 18px 16px;
    border-left-width: 3px;
}

.shield .layer-idx {
    font-family: var(--mono);
    font-size: 12px;
    font-weight: 500;
    letter-spacing: 0.12em;
    padding-top: 4px;
}

.shield h3 {
    margin: 0 0 6px;
    font-family: var(--mono);
    font-size: 13px;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}

.shield p {
    margin: 0;
    color: var(--muted);
    font-size: 0.95rem;
}

.shield .watch {
    border-left-color: var(--idle);
}

.shield .watch .layer-idx,
.shield .watch h3 {
    color: var(--idle);
}

.shield .keep {
    border-left-color: var(--pass);
}

.shield .keep .layer-idx,
.shield .keep h3 {
    color: var(--pass);
}

.shield .cut {
    border-left-color: var(--drop);
}

.shield .cut .layer-idx,
.shield .cut h3 {
    color: var(--drop);
}

.shield .widen {
    border-left-color: var(--text);
}

.shield .widen .layer-idx,
.shield .widen h3 {
    color: var(--text);
}

@media (min-width: 721px) {
    .shield > li:nth-child(2) {
        margin-inline: 14px;
    }

    .shield > li:nth-child(3) {
        margin-inline: 28px;
    }

    .shield > li:nth-child(4) {
        margin-inline: 42px;
    }
}

.machine {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 16px;
    align-items: stretch;
}

.machine article {
    border: 1px solid var(--line);
    background: var(--panel);
    border-radius: 10px;
    padding: 20px;
}

.machine .idle {
    border-color: rgba(251, 191, 36, 0.35);
}

.machine .active {
    border-color: rgba(251, 113, 133, 0.35);
}

.machine h3 {
    margin: 0 0 6px;
    font-family: var(--mono);
    font-size: 13px;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}

.machine .idle h3 {
    color: var(--idle);
}

.machine .active h3 {
    color: var(--drop);
}

.machine p {
    margin: 0;
    color: var(--muted);
    font-size: 0.95rem;
}

.machine ul {
    margin: 12px 0 0;
    padding: 0 0 0 18px;
    color: var(--muted);
}

.arrows {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 18px;
    font-family: var(--mono);
    font-size: 11px;
    color: var(--muted);
    min-width: 160px;
}

.arrows div {
    text-align: center;
}

.arrows span {
    display: block;
    color: var(--faint);
    margin-top: 4px;
}

.page-head {
    padding: 56px 0 28px;
}

.page-head h1 {
    margin: 0;
    font-size: clamp(1.8rem, 4vw, 2.6rem);
    font-weight: 600;
    letter-spacing: -0.03em;
    line-height: 1.15;
    max-width: 18ch;
}

.page-head .lede {
    font-size: 1.05rem;
}

.prose h2 {
    margin: 2.2rem 0 0.7rem;
    font-size: 1.25rem;
}

.prose h3 {
    margin: 1.6rem 0 0.5rem;
    font-size: 1.02rem;
}

.prose p,
.prose li {
    color: var(--muted);
}

.prose p {
    max-width: 46rem;
}

.prose strong {
    color: var(--text);
    font-weight: 500;
}

.path {
    list-style: none;
    margin: 0;
    padding: 0;
    counter-reset: step;
}

.path li {
    position: relative;
    padding: 14px 0 14px 56px;
    border-bottom: 1px solid var(--line);
    color: var(--muted);
}

.path li::before {
    counter-increment: step;
    content: counter(step, decimal-leading-zero);
    position: absolute;
    left: 0;
    top: 14px;
    font-family: var(--mono);
    font-size: 12px;
    letter-spacing: 0.08em;
    color: var(--pass);
}

.path .drop-step {
    color: var(--drop);
}

.grid-table-wrap {
    overflow-x: auto;
    border: 1px solid var(--line);
    border-radius: 10px;
    background: var(--panel);
}

.grid-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

.grid-table th,
.grid-table td {
    text-align: left;
    padding: 11px 14px;
    border-bottom: 1px solid var(--line);
    vertical-align: top;
}

.grid-table th {
    font-family: var(--mono);
    font-size: 11px;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--faint);
    background: var(--void);
}

.grid-table tr:last-child td {
    border-bottom: 0;
}

.grid-table td:first-child {
    font-family: var(--mono);
    color: var(--pass);
    white-space: nowrap;
}

.checks {
    list-style: none;
    margin: 0;
    padding: 0;
}

.checks li {
    display: grid;
    grid-template-columns: 18px 1fr;
    gap: 12px;
    padding: 12px 0;
    border-bottom: 1px solid var(--line);
    color: var(--muted);
}

.checks li::before {
    content: "";
    width: 8px;
    height: 8px;
    margin-top: 7px;
    background: var(--pass);
    box-shadow: 0 0 8px var(--pass);
}

.code {
    margin: 16px 0 24px;
    border: 1px solid var(--line);
    border-radius: 10px;
    background: #080b10;
    overflow: hidden;
}

.code-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 12px;
    border-bottom: 1px solid var(--line);
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--faint);
}

.copy {
    appearance: none;
    border: 1px solid var(--line-2);
    background: transparent;
    color: var(--muted);
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    padding: 4px 8px;
    border-radius: 4px;
    cursor: pointer;
}

.copy:hover,
.copy.is-copied {
    color: var(--pass);
    border-color: var(--pass);
}

.code pre {
    margin: 0;
    padding: 16px 18px 18px;
    overflow-x: auto;
    font-family: var(--mono);
    font-size: 13px;
    line-height: 1.55;
    color: var(--text);
}

.note {
    border: 1px solid var(--line);
    border-left-width: 3px;
    border-radius: 8px;
    padding: 12px 14px;
    margin: 18px 0;
    color: var(--muted);
    background: var(--panel);
}

.note.warn {
    border-left-color: var(--drop);
}

.note.ok {
    border-left-color: var(--pass);
}

.note.idle {
    border-left-color: var(--idle);
}

.term {
    border: 1px solid var(--line);
    border-radius: 10px;
    background: #07090d;
    overflow: hidden;
}

.term-bar {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 10px 12px;
    border-bottom: 1px solid var(--line);
    color: var(--faint);
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.term-bar i {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--line-2);
}

.term-bar i:nth-child(1) { background: #fb7185; }
.term-bar i:nth-child(2) { background: #fbbf24; }
.term-bar i:nth-child(3) { background: #5eead4; }

.term pre {
    margin: 0;
    padding: 16px 18px 20px;
    font-family: var(--mono);
    font-size: 13px;
    line-height: 1.6;
    overflow-x: auto;
    color: var(--text);
}

.term .cmd {
    color: var(--pass);
}

.term .out {
    color: var(--muted);
}

.two {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.site-footer {
    border-top: 1px solid var(--line);
    padding: 36px 0 48px;
    margin-top: 24px;
}

.footer-inner {
    display: flex;
    justify-content: space-between;
    gap: 32px;
    flex-wrap: wrap;
}

.footer-inner strong {
    font-family: var(--mono);
    font-size: 12px;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}

.footer-inner p {
    margin: 8px 0 0;
    color: var(--faint);
    font-size: 0.92rem;
    max-width: 36rem;
}

.footer-meta {
    font-family: var(--mono);
    font-size: 12px;
    color: var(--faint);
}

.footer-nav {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin-top: 8px;
}

.footer-nav a {
    color: var(--muted);
    text-decoration: none;
    font-family: var(--mono);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.footer-nav a:hover {
    color: var(--pass);
}

.focus-ring:focus-visible,
a:focus-visible,
button:focus-visible {
    outline: 2px solid var(--pass);
    outline-offset: 3px;
}

@media (max-width: 860px) {
    .facts,
    .nogo,
    .machine,
    .two {
        grid-template-columns: 1fr;
    }

    .arrows {
        flex-direction: row;
        min-width: 0;
        justify-content: space-around;
        font-size: 11px;
    }

    .page-head h1 {
        max-width: none;
    }
}

@media (max-width: 720px) {
    .nav-toggle {
        display: inline-flex;
    }

    .site-nav {
        display: none;
        position: absolute;
        top: var(--header-h);
        left: 0;
        right: 0;
        flex-direction: column;
        align-items: stretch;
        padding: 8px 16px 16px;
        background: rgba(5, 6, 10, 0.97);
        border-bottom: 1px solid var(--line);
        gap: 4px;
    }

    .site-header.is-open .site-nav {
        display: flex;
    }

    .site-nav a.nav-ext {
        margin-left: 0;
    }

    .hero {
        padding-top: 48px;
    }

    .stages li {
        flex: 1 1 calc(50% - 8px);
    }
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    .pkt {
        display: none;
    }
}