:root {
    color-scheme: dark;
    --bg: #050914;
    --bg-soft: #0b1222;
    --panel: rgba(14, 24, 43, 0.86);
    --panel-strong: #101c31;
    --line: #243654;
    --text: #f5f7fb;
    --muted: #9bacbf;
    --cyan: #19c5ff;
    --cyan-soft: #8be4ff;
    --amber: #ffb340;
    --green: #59dfa0;
    --red: #ff6b7a;
    --radius: 18px;
    --shadow: 0 24px 70px rgba(0, 0, 0, 0.28);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

html { background: var(--bg); }

body {
    margin: 0;
    min-width: 320px;
    color: var(--text);
    background:
        radial-gradient(circle at 84% 8%, rgba(25, 197, 255, 0.13), transparent 27rem),
        radial-gradient(circle at 14% 28%, rgba(255, 179, 64, 0.08), transparent 25rem),
        var(--bg);
    line-height: 1.6;
}

a { color: var(--cyan-soft); }
a:hover { color: #fff; }
img { max-width: 100%; }
button, input, textarea, select { font: inherit; }

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

.skip-link {
    position: fixed;
    z-index: 20;
    top: 0.7rem;
    left: 0.7rem;
    padding: 0.7rem 1rem;
    color: var(--bg);
    background: #fff;
    border-radius: 10px;
    transform: translateY(-180%);
}

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

.shell {
    width: min(1160px, calc(100% - 2rem));
    margin-inline: auto;
}

.site-header {
    position: sticky;
    z-index: 10;
    top: 0;
    border-bottom: 1px solid rgba(139, 228, 255, 0.13);
    background: rgba(5, 9, 20, 0.9);
    backdrop-filter: blur(18px);
}

.header-row {
    display: flex;
    align-items: center;
    min-height: 68px;
    gap: 1.2rem;
}

.brand {
    display: inline-flex;
    align-items: center;
    flex: none;
    gap: 0.65rem;
    color: var(--text);
    font-weight: 800;
    letter-spacing: -0.03em;
    text-decoration: none;
}

.brand-mark {
    display: grid;
    width: 2rem;
    height: 2rem;
    place-items: center;
    border: 1px solid rgba(25, 197, 255, 0.65);
    border-radius: 50%;
    color: var(--cyan);
    box-shadow: 0 0 22px rgba(25, 197, 255, 0.3);
}

.site-nav {
    overflow-x: auto;
    margin-left: auto;
    scrollbar-width: thin;
}

.site-nav ul {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    min-width: max-content;
    margin: 0;
    padding: 0;
    list-style: none;
}

.site-nav a {
    display: block;
    padding: 0.52rem 0.68rem;
    border-radius: 9px;
    color: var(--muted);
    font-size: 0.88rem;
    font-weight: 650;
    text-decoration: none;
}

.site-nav a:hover,
.site-nav a[aria-current="page"],
.site-nav a.section-current {
    color: var(--text);
    background: rgba(25, 197, 255, 0.1);
}

main { min-height: calc(100vh - 230px); }

.hero,
.page-hero {
    display: grid;
    align-items: center;
    gap: 2rem;
    padding-block: clamp(3rem, 7vw, 6.5rem);
}

.hero { grid-template-columns: minmax(0, 1.35fr) minmax(280px, 0.65fr); }
.page-hero { padding-bottom: 2.5rem; }

.eyebrow {
    margin: 0 0 0.7rem;
    color: var(--cyan-soft);
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}

h1, h2, h3 { line-height: 1.12; }
h1 { margin: 0; font-size: clamp(2.6rem, 7vw, 5.8rem); letter-spacing: -0.065em; }
.page-hero h1 { font-size: clamp(2.4rem, 5vw, 4.6rem); }
h2 { margin: 0 0 0.85rem; font-size: clamp(1.55rem, 3vw, 2.35rem); letter-spacing: -0.035em; }
h3 { margin: 0 0 0.55rem; font-size: 1.08rem; }

.lede {
    max-width: 68ch;
    margin: 1.1rem 0 0;
    color: var(--muted);
    font-size: clamp(1.02rem, 2vw, 1.24rem);
}

.accent { color: var(--cyan); }
.accent-warm { color: var(--amber); }

.actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 1.7rem;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    padding: 0.7rem 1rem;
    border: 1px solid var(--line);
    border-radius: 11px;
    color: var(--text);
    background: var(--panel-strong);
    font-weight: 750;
    text-decoration: none;
    cursor: pointer;
}

.button:hover { border-color: var(--cyan); color: #fff; }
.button.primary { border-color: transparent; color: #00121a; background: var(--cyan); }

.command {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    max-width: 430px;
    margin-top: 1.2rem;
    padding: 0.75rem 0.8rem 0.75rem 1rem;
    border: 1px solid var(--line);
    border-radius: 12px;
    background: rgba(0, 0, 0, 0.28);
}

.command code { overflow-x: auto; flex: 1; white-space: nowrap; }
.copy-button { min-height: 34px; padding: 0.35rem 0.65rem; font-size: 0.8rem; }

code, pre, kbd {
    font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

code { color: #d9f6ff; }

pre {
    overflow-x: auto;
    margin: 0;
    padding: 1.05rem;
    border: 1px solid var(--line);
    border-radius: 14px;
    background: #050b16;
    line-height: 1.55;
}

.signal-card {
    position: relative;
    min-height: 340px;
    overflow: hidden;
    border: 1px solid rgba(25, 197, 255, 0.2);
    border-radius: 26px;
    background: linear-gradient(145deg, rgba(10, 22, 42, 0.9), rgba(6, 12, 24, 0.92));
    box-shadow: var(--shadow);
}

.signal-card::before,
.signal-card::after {
    position: absolute;
    top: 50%;
    height: 2px;
    content: "";
    transform-origin: left;
}

.signal-card::before { left: 39%; width: 52%; background: var(--cyan); transform: rotate(-27deg); box-shadow: 0 0 14px var(--cyan); }
.signal-card::after { left: 39%; width: 52%; background: var(--amber); transform: rotate(28deg); box-shadow: 0 0 14px var(--amber); }

.node {
    position: absolute;
    display: grid;
    width: 58px;
    height: 58px;
    place-items: center;
    border: 2px solid currentColor;
    border-radius: 50%;
    background: var(--bg-soft);
    box-shadow: 0 0 25px currentColor;
    font-weight: 850;
}

.node.source { top: calc(50% - 29px); left: calc(39% - 29px); color: var(--cyan); }
.node.one { top: 17%; right: 9%; color: var(--cyan); }
.node.two { top: calc(50% - 29px); right: 9%; color: var(--cyan); }
.node.three { right: 9%; bottom: 17%; color: var(--amber); }

.section { padding-block: 2.5rem; }
.section + .section { border-top: 1px solid rgba(139, 228, 255, 0.1); }
.section-heading { max-width: 760px; margin-bottom: 1.35rem; }
.section-heading p { margin: 0; color: var(--muted); }

.grid { display: grid; gap: 1rem; }
.grid.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid.three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid.four { grid-template-columns: repeat(4, minmax(0, 1fr)); }

.card,
.stat,
.callout,
.code-card {
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--panel);
    box-shadow: 0 16px 42px rgba(0, 0, 0, 0.12);
}

.card, .callout, .code-card { padding: 1.2rem; }
.card p, .callout p { margin: 0; color: var(--muted); }
.card a.stretched { display: inline-block; margin-top: 0.85rem; font-weight: 750; text-decoration: none; }

.stat { padding: 1rem; }
.stat strong { display: block; color: var(--cyan-soft); font-size: 1.65rem; }
.stat span { color: var(--muted); font-size: 0.84rem; }

.metric[data-state="pass"] strong,
[data-runtime-status="pass"] { color: var(--green); }
.metric[data-state="fail"] strong,
[data-runtime-status="fail"] { color: var(--red); }

.callout { border-left: 4px solid var(--amber); }
.callout strong { display: block; margin-bottom: 0.4rem; }

.reference-table {
    width: 100%;
    border-collapse: collapse;
    border: 1px solid var(--line);
    border-radius: 14px;
    background: var(--panel);
}

.table-wrap { overflow-x: auto; border-radius: 14px; }
.reference-table caption { padding: 0.8rem; color: var(--text); font-weight: 800; text-align: left; }
.reference-table th, .reference-table td { padding: 0.9rem; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
.reference-table th { color: var(--cyan-soft); font-size: 0.78rem; letter-spacing: 0.07em; text-transform: uppercase; }
.reference-table tr:last-child td { border-bottom: 0; }

.steps { display: grid; gap: 0.9rem; margin: 0; padding: 0; list-style: none; counter-reset: steps; }
.steps li { position: relative; padding: 1rem 1rem 1rem 3.7rem; border: 1px solid var(--line); border-radius: 14px; background: var(--panel); counter-increment: steps; }
.steps li::before { position: absolute; top: 0.92rem; left: 1rem; display: grid; width: 1.9rem; height: 1.9rem; place-items: center; border-radius: 50%; color: var(--bg); background: var(--cyan); content: counter(steps); font-weight: 900; }

.playground-workbench { display: grid; grid-template-columns: minmax(0, 0.88fr) minmax(0, 1.12fr); gap: 1.2rem; }
.playground-controls, .playground-observers { display: grid; align-content: start; gap: 1rem; }
.playground-status { margin: 0; padding: 0.8rem 1rem; border-left: 4px solid var(--green); color: var(--text); background: rgba(89, 223, 160, 0.08); }
.playground-status[data-state="error"] { border-color: var(--red); background: rgba(255, 107, 122, 0.1); }
.field { display: grid; gap: 0.4rem; margin-bottom: 0.9rem; }
.field label { font-weight: 750; }
.field small { color: var(--muted); }
.field input, .field textarea, .field select { width: 100%; min-height: 44px; padding: 0.7rem; border: 1px solid var(--line); border-radius: 10px; color: var(--text); background: #060c17; }
.field textarea { resize: vertical; }
.field input:disabled, .field textarea:disabled, .field select:disabled { opacity: 0.55; cursor: not-allowed; }
.preset-field { margin: 0 0 1rem; padding: 0; border: 0; }
.preset-field legend { margin-bottom: 0.35rem; font-weight: 750; }
.actions.compact { margin-top: 0; gap: 0.45rem; }
.toolbar { display: flex; flex-wrap: wrap; gap: 0.75rem; }
.panel-heading, .registry-heading, .chart-heading { display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.panel-heading > span, .registry-heading > span, .chart-heading p { color: var(--muted); }
.registry-panel { min-height: 250px; padding: 1rem; border: 1px solid var(--line); border-radius: 14px; background: var(--panel); }
.registry-group { padding-block: 0.9rem; border-top: 1px solid rgba(139, 228, 255, 0.12); }
.registry-group:first-child { border-top: 0; }
.registry-group h3 { margin: 0; color: var(--cyan-soft); }
.registry-group ol { display: grid; gap: 0.5rem; margin: 0.75rem 0 0; padding: 0; list-style: none; }
.registry-group li { display: flex; align-items: center; justify-content: space-between; gap: 0.8rem; color: var(--muted); }
.registry-group li strong { color: var(--text); }
.compact-button { flex: none; min-height: 44px; padding: 0.5rem 0.75rem; font-size: 0.84rem; }
.event-log { min-height: 310px; max-height: 480px; overflow: auto; margin: 0; padding: 1rem; border: 1px solid var(--line); border-radius: 14px; background: #020711; list-style: none; }
.event-log li { display: grid; grid-template-columns: 3.4rem minmax(8rem, 0.7fr) minmax(0, 1.3fr); gap: 0.65rem; padding: 0.7rem 0; border-bottom: 1px solid rgba(139, 228, 255, 0.1); color: var(--muted); }
.event-log strong { color: var(--cyan-soft); }
.event-log .log-sequence { color: var(--amber); font-variant-numeric: tabular-nums; }
.event-log .log-placeholder { display: block; }

.scenario-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; }
.scenario-card { padding: 1.2rem; border: 1px solid var(--line); border-radius: var(--radius); background: var(--panel); }
.scenario-card p { color: var(--muted); }
.scenario-card output { display: block; min-height: 3rem; margin-top: 1rem; padding: 0.7rem; border-left: 4px solid var(--line); color: var(--muted); background: rgba(0, 0, 0, 0.2); }
.scenario-card output[data-state="pass"] { border-color: var(--green); color: var(--green); }
.scenario-card output[data-state="fail"] { border-color: var(--red); color: var(--red); }

.chart-heading { margin-bottom: 1rem; }
.chart-heading h2, .chart-heading p { margin: 0; }
.chart-shell { display: grid; gap: 1rem; }
.latency-scale { display: flex; justify-content: space-between; margin-left: min(34%, 20rem); color: var(--muted); font-size: 0.78rem; font-variant-numeric: tabular-nums; }
.latency-chart { display: grid; gap: 1rem; margin: 0; padding: 0; list-style: none; }
.latency-row { display: grid; grid-template-columns: minmax(13rem, 0.9fr) minmax(16rem, 1.5fr) minmax(10rem, 0.6fr); align-items: center; gap: 1rem; }
.latency-label { display: grid; gap: 0.25rem; }
.latency-label code { overflow-wrap: anywhere; color: var(--muted); font-size: 0.78rem; }
.latency-track { position: relative; height: 1.6rem; background: rgba(155, 172, 191, 0.14); }
.latency-bar, .latency-interval, .latency-sample { position: absolute; }
.latency-bar { inset: 0 auto 0 0; background: rgba(25, 197, 255, 0.36); }
.latency-interval { top: 0.55rem; height: 0.5rem; background: var(--amber); }
.latency-sample { top: 0.4rem; width: 0.8rem; height: 0.8rem; border-radius: 50%; background: var(--cyan); transform: translateX(-50%); }
.latency-value { display: grid; }
.latency-value strong { color: var(--cyan-soft); font-size: 1.2rem; font-variant-numeric: tabular-nums; }
.latency-value span { color: var(--muted); font-size: 0.78rem; }
.benchmark-table { margin-top: 1rem; }

.result-panel { padding: 1.2rem; border: 1px solid var(--line); border-radius: var(--radius); background: #050b16; }
.result-head { display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.score { color: var(--cyan); font-size: 2rem; font-weight: 900; }
.case-list { columns: 2; column-gap: 2rem; margin: 1rem 0 0; padding-left: 1.2rem; }
.case-list li { break-inside: avoid; margin-bottom: 0.38rem; color: var(--muted); }
.case-list li::marker { color: var(--green); }

.site-footer { margin-top: 4rem; border-top: 1px solid rgba(139, 228, 255, 0.12); background: #040812; }
.footer-row { display: flex; justify-content: space-between; gap: 2rem; padding-block: 1.7rem; color: var(--muted); font-size: 0.88rem; }
.footer-links { display: flex; flex-wrap: wrap; gap: 0.8rem; }
.footer-links a { color: var(--muted); }

@media (max-width: 900px) {
    .header-row { display: block; padding-block: 0.7rem; }
    .site-nav { margin-top: 0.45rem; }
    .hero, .playground-workbench { grid-template-columns: 1fr; }
    .signal-card { min-height: 280px; }
    .grid.four { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .grid.three { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .latency-row { grid-template-columns: minmax(11rem, 0.8fr) minmax(14rem, 1.2fr); }
    .latency-value { grid-column: 2; }
}

@media (max-width: 620px) {
    .shell { width: min(100% - 1.2rem, 1160px); }
    .grid.two, .grid.three, .grid.four { grid-template-columns: 1fr; }
    .scenario-grid { grid-template-columns: 1fr; }
    .case-list { columns: 1; }
    .panel-heading, .registry-heading, .chart-heading { align-items: flex-start; flex-direction: column; }
    .registry-group li { align-items: flex-start; flex-direction: column; }
    .event-log li { grid-template-columns: 2.7rem minmax(0, 1fr); }
    .event-log li > :last-child { grid-column: 2; }
    .latency-scale { margin-left: 0; }
    .latency-row { grid-template-columns: 1fr; gap: 0.5rem; }
    .latency-value { grid-column: auto; }
    .footer-row { display: block; }
    .footer-links { margin-top: 0.8rem; }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
}