:root {
    color-scheme: light;
    --bg: #f4f6f2;
    --panel: #ffffff;
    --panel-soft: rgba(255, 255, 255, .88);
    --text: #202b2d;
    --muted: #68797b;
    --line: rgba(28, 148, 173, .58);
    --cyan: #168ca6;
    --ginkgo: #82972a;
    --gold: #c5a82d;
    --content-width: 880px;
    --mono: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace;
}
* { box-sizing: border-box; }
html { min-width: 320px; scroll-behavior: smooth; }
body {
    margin: 0; min-height: 100vh; color: var(--text);
    background:
        radial-gradient(ellipse at 50% 2%, rgba(101, 190, 176, .13), transparent 42rem),
        linear-gradient(180deg, #fbfcf9 0%, var(--bg) 42rem);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    line-height: 1.65;
}
body::before {
    content: ""; position: fixed; inset: 0; z-index: -1; pointer-events: none; opacity: .2;
    background-image: radial-gradient(rgba(22,140,166,.3) .7px, transparent .7px);
    background-size: 25px 25px;
    mask-image: linear-gradient(to bottom, black, transparent 80%);
}
a { color: var(--cyan); text-underline-offset: .2em; }
a:hover { color: var(--gold); }
.skip-link { position: absolute; left: -9999px; top: 1rem; z-index: 20; }
.skip-link:focus { left: 1rem; padding: .6rem 1rem; background: var(--panel); }
.site-header { position: relative; padding: .5rem clamp(1rem, 4vw, 4rem) 0; overflow: hidden; }
.page-footer { font-family: var(--mono); }
.circuit-nav {
    position: relative; width: 100%; max-width: 1100px; aspect-ratio: 1100 / 380;
    margin: 0 auto; isolation: isolate;
}
.circuit-traces { position: absolute; inset: 0; width: 100%; height: 100%; overflow: visible; z-index: 0; }
.circuit-trace {
    fill: none; stroke: var(--line); stroke-width: 1.65; stroke-linecap: round; stroke-linejoin: round;
    vector-effect: non-scaling-stroke; opacity: .95; transition: stroke .22s ease, filter .22s ease, stroke-width .22s ease;
}
.circuit-trace.is-active, .circuit-trace:hover {
    stroke: var(--gold); stroke-width: 2.5; filter: drop-shadow(0 0 3px rgba(197,168,45,.65));
}
.circuit-joint { fill: #fbfcf9; stroke: var(--cyan); stroke-width: 1.6; vector-effect: non-scaling-stroke; }
.circuit-joint.is-active { fill: #fff8c8; stroke: var(--gold); filter: drop-shadow(0 0 3px rgba(197,168,45,.7)); }
.home-node {
    position: absolute; z-index: 3; left: 50%; top: 47.37%; transform: translate(-50%, -50%);
    display: grid; place-items: center; width: 12%; max-width: 132px; min-width: 82px; aspect-ratio: 1;
    border-radius: 50%; background: #fff; border: 1px solid rgba(197,168,45,.9);
    box-shadow: 0 4px 18px rgba(35,65,67,.1); transition: box-shadow .25s ease;
}
.home-node:hover { box-shadow: 0 0 22px rgba(197,168,45,.22); }
.home-node__image { width: 100%; height: 100%; object-fit: cover; border-radius: 50%; }
.home-node__halo, .home-node__ring { display: none; }
.nav-nodes { position: absolute; inset: 0; z-index: 2; pointer-events: none; }
.nav-node {
    position: absolute; top: var(--node-y); left: var(--node-x); transform: translateY(-50%);
    display: flex; align-items: center; justify-content: center; width: 14.55%; min-width: 115px; max-width: 160px;
    min-height: 42px; padding: .55rem .75rem; border: 1.5px solid var(--cyan); border-radius: 999px;
    background: rgba(251,252,249,.96); color: #31585e; text-decoration: none; text-align: center;
    font-size: clamp(.68rem, .95vw, .82rem); letter-spacing: .015em; box-shadow: 0 4px 14px rgba(22,140,166,.08);
    pointer-events: auto; transition: color .2s ease, background .2s ease, border-color .2s ease, box-shadow .2s ease;
}
.nav-node--left { left: var(--node-x); }
.nav-node--right { left: var(--node-x); }
.nav-node__pin { display: none; }
.nav-node__label { overflow-wrap: anywhere; }
.nav-node:hover, .nav-node.is-active {
    color: #263b15; border-color: var(--gold); background: #fffde8;
    box-shadow: 0 0 0 2px rgba(197,168,45,.12), 0 0 17px rgba(197,168,45,.32);
}
.nav-node.is-active .nav-node__label { color: #71600f; }
.main-layout { width: min(var(--content-width), calc(100% - 2rem)); margin: 0 auto; padding: 1.25rem 0 1.5rem; }
.markdown-content {
    padding: clamp(1.25rem, 4vw, 3rem); border: 1px solid rgba(22,140,166,.16);
    border-radius: 18px; background: linear-gradient(135deg, rgba(255,255,255,.96), rgba(248,250,246,.94));
    box-shadow: 0 16px 44px rgba(37,62,58,.08); overflow-wrap: anywhere;
}
.markdown-content h1, .markdown-content h2, .markdown-content h3 { line-height: 1.2; letter-spacing: -.025em; }
.markdown-content h1 { margin: 0 0 1.25rem; font-size: clamp(2rem, 5vw, 3.35rem); font-weight: 650; }
.markdown-content h1::after { content: ""; display: block; width: 64px; height: 3px; margin-top: 1.15rem; background: linear-gradient(90deg, var(--ginkgo), var(--gold)); border-radius: 2px; }
.markdown-content h2 { margin-top: 2.2rem; color: var(--cyan); font-size: 1.35rem; }
.markdown-content h3 { margin-top: 1.7rem; color: var(--gold); font-size: 1.08rem; }
.markdown-content p { color: #4e6062; margin: 0 0 1.15rem; }
.markdown-content strong { color: #202b2d; }
.markdown-content code { font-family: var(--mono); font-size: .9em; color: var(--gold); background: rgba(230,206,83,.08); padding: .12rem .35rem; border-radius: 4px; }
.markdown-content pre { overflow-x: auto; padding: 1rem; background: #eef3f0; border: 1px solid rgba(22,140,166,.18); border-radius: 8px; }
.markdown-content pre code { padding: 0; background: transparent; color: var(--cyan); }
.markdown-content ul, .markdown-content ol { padding-left: 1.4rem; color: #4e6062; }
.markdown-content li { padding: .2rem 0 .2rem .2rem; }
.markdown-content li::marker { color: var(--ginkgo); }
.markdown-content blockquote { margin: 1.5rem 0; padding: .25rem 1.2rem; border-left: 2px solid var(--gold); color: var(--muted); }
.markdown-content hr { border: 0; border-top: 1px solid rgba(101,221,244,.2); margin: 2rem 0; }
.page-footer { display: flex; justify-content: space-between; gap: 1rem; margin-top: 1.25rem; padding: 1.25rem .25rem; color: #63737b; font-size: .72rem; letter-spacing: 0; text-transform: none; }
.page-footer__accent { color: #748528; text-align: right; }
.page-footer__links { display: flex; align-items: center; gap: 1.25rem; }
.page-footer__links a { color: #267e8b; text-decoration: none; letter-spacing: .02em; }
.page-footer__links a:hover { color: #79660d; text-decoration: underline; }
@media (max-width: 700px) {
    .site-header { padding: .5rem 1rem 0; }
    .circuit-nav { display: grid; grid-template-columns: 82px minmax(0, 1fr); gap: 0 1rem; padding: 1rem 0 .5rem; align-items: start; aspect-ratio: auto; }
    .circuit-traces { display: none; }
    .home-node { position: relative; left: auto; top: auto; transform: none; width: 78px; min-width: 78px; margin: .25rem auto 0 0; grid-column: 1; grid-row: 1; }
    .nav-nodes { position: relative; inset: auto; grid-column: 2; grid-row: 1; display: flex; flex-direction: column; align-items: stretch; gap: .55rem; min-width: 0; }
    .nav-node, .nav-node--left, .nav-node--right { position: relative; top: auto; left: auto; transform: none; width: 100%; min-width: 0; max-width: none; min-height: 38px; justify-content: flex-start; padding: .45rem .8rem .45rem 1.15rem; font-size: .82rem; }
    .nav-node::before { content: ""; position: absolute; top: 50%; left: -1rem; width: 1rem; height: 1px; background: var(--line); }
    .nav-node__pin { display: block; position: absolute; top: calc(50% - 3px); left: -1.05rem; width: 7px; height: 7px; border-radius: 50%; background: var(--cyan); border: 1px solid #fbfcf9; }
    .nav-node:hover::before, .nav-node.is-active::before { background: var(--gold); box-shadow: 0 0 7px rgba(197,168,45,.6); }
    .nav-node:hover .nav-node__pin, .nav-node.is-active .nav-node__pin { background: var(--gold); }
    .main-layout { padding-top: 1.5rem; }
    .markdown-content { border-radius: 12px; }
    .page-footer { flex-direction: column; gap: .7rem; }
    .page-footer__links { gap: 1rem; }
    .page-footer__accent { text-align: left; }
}
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; transition-duration: .01ms !important; }
}