/* NetAgents -- site stylesheet
   Layout: a fixed side rail (brand, nav, a small topology sketch) beside a
   scrolling content column, rather than a stacked top-nav/hero page. Visual
   language borrows from route tables, traceroutes, and config stanzas --
   monospace for structure and metadata, serif for headlines and entry
   names, sans for body copy. */

:root {
  --color-bg: #0a0c10;
  --color-bg-rail: #0d1013;
  --color-bg-raised: #14181d;
  --color-bg-inset: #101317;
  --color-text: #ece7d8;
  --color-muted: #8b8776;
  --color-border: #262b31;
  --color-amber: #e0a038;
  --color-amber-bright: #f6c86a;
  --color-green: #7bbf84;
  --color-red: #d97b7b;
  --max-width: 760px;
  --rail-width: 240px;
  --radius: 3px;
  --font-display: "Iowan Old Style", "Palatino Linotype", Georgia, serif;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, "SF Mono", "Cascadia Code", Menlo, Consolas, monospace;
  color-scheme: dark;
}

@media (prefers-color-scheme: light) {
  :root {
    --color-bg: #f6f1e6;
    --color-bg-rail: #efe8d8;
    --color-bg-raised: #fffdf8;
    --color-bg-inset: #ede5d2;
    --color-text: #211d15;
    --color-muted: #6b6350;
    --color-border: #ddd2b8;
    --color-amber: #a5691c;
    --color-amber-bright: #7d4e12;
    --color-green: #3f7a49;
    --color-red: #a4372f;
    color-scheme: light;
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

img, svg { max-width: 100%; height: auto; display: block; }
a { color: var(--color-amber-bright); text-decoration: none; }
a:hover { text-decoration: underline; }
code, .mono { font-family: var(--font-mono); font-size: 0.92em; }

h1, h2, h3 { font-family: var(--font-display); font-weight: 600; line-height: 1.2; letter-spacing: -0.01em; margin-top: 0; }
h1 { font-size: clamp(2.1rem, 4vw, 3.1rem); font-weight: 700; }
h2 { font-size: clamp(1.35rem, 2.2vw, 1.7rem); }
h3 { font-size: 1.1rem; font-weight: 600; }
p { color: var(--color-text); }
.lede { color: var(--color-muted); font-size: 1.08rem; max-width: 52ch; }

.eyebrow {
  display: inline-flex; align-items: center; gap: 0.5rem;
  font-family: var(--font-mono); text-transform: uppercase; letter-spacing: 0.14em;
  font-size: 0.72rem; color: var(--color-amber); font-weight: 600; margin-bottom: 1rem;
}
.eyebrow::before { content: "//"; opacity: 0.6; }

/* ---------- Shell: side rail + content column ---------- */
.shell { display: flex; min-height: 100vh; align-items: flex-start; }

.rail {
  width: var(--rail-width); flex: none;
  background: var(--color-bg-rail);
  border-right: 1px solid var(--color-border);
  padding: 1.75rem 1.5rem 2rem;
  position: sticky; top: 0; height: 100vh;
  display: flex; flex-direction: column;
}
.brand { display: flex; align-items: center; gap: 0.55rem; color: var(--color-text); margin-bottom: 2rem; }
.brand:hover { text-decoration: none; }
.brand svg { width: 26px; height: 26px; flex: none; color: var(--color-amber); }
.brand .wordmark { font-family: var(--font-display); font-weight: 600; font-size: 1.2rem; }
.brand .wordmark .dim { color: var(--color-muted); font-weight: 400; }

.rail nav ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 0.15rem; }
.rail nav a {
  display: flex; align-items: center; gap: 0.5rem;
  font-family: var(--font-mono); font-size: 0.86rem; font-weight: 500; color: var(--color-muted);
  padding: 0.4rem 0.5rem; border-radius: var(--radius); transition: background 0.15s ease, color 0.15s ease;
}
.rail nav a::before { content: "·"; color: var(--color-border); font-size: 1.1rem; line-height: 0; }
.rail nav a:hover { color: var(--color-text); text-decoration: none; background: var(--color-bg-inset); }
.rail nav a[aria-current="page"] { color: var(--color-amber-bright); font-weight: 600; background: var(--color-bg-inset); }
.rail nav a[aria-current="page"]::before { content: "›"; color: var(--color-amber); }

.rail-graphic { margin: 2.25rem 0; opacity: 0.85; flex: none; min-width: 0; max-width: 100%; }
.rail-graphic svg { width: 100%; height: auto; max-width: 140px; }

.rail-note {
  margin-top: auto; font-family: var(--font-mono); font-size: 0.74rem;
  color: var(--color-muted); line-height: 1.6; padding-top: 1.5rem;
  border-top: 1px solid var(--color-border);
}

.main-col { flex: 1; min-width: 0; max-width: 100%; display: flex; flex-direction: column; overflow-x: hidden; }

@media (max-width: 860px) {
  .shell { flex-direction: column; }
  .rail {
    width: 100%; height: auto; position: static; flex-direction: row;
    align-items: center; flex-wrap: wrap; padding: 1.1rem 1.25rem; gap: 1rem 1.5rem;
  }
  .brand { margin-bottom: 0; }
  .rail nav ul { flex-direction: row; flex-wrap: wrap; gap: 0.25rem 0.9rem; }
  .rail nav a { padding: 0.2rem 0; }
  .rail-graphic, .rail-note { display: none; }
}

.wrap { max-width: var(--max-width); margin: 0 auto; padding: 0 1.75rem; }
.wrap-wide { max-width: 980px; }

/* ---------- Hero ---------- */
.hero {
  padding: 3.75rem 0 2.75rem;
  background-image: url("../images/grid-texture.png");
  background-repeat: repeat;
}
.hero-home, .hero-split { padding: 4.5rem 0 3rem; }
.hero-home .hero-inner, .hero-split .hero-inner {
  display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 3rem; align-items: center;
  max-width: 980px; margin: 0 auto; padding: 0 1.75rem;
}
.hero-home .hero-inner > *, .hero-split .hero-inner > * { min-width: 0; }
.hero-home .hero-graphic, .hero-split .hero-graphic { opacity: 0.9; max-width: 100%; }
.hero-home .hero-graphic svg { width: 100%; height: auto; max-width: 320px; margin: 0 auto; }
.hero-illustration { max-width: 340px; margin: 0 auto; border-radius: var(--radius); overflow: hidden; }
.hero-illustration img { width: 100%; height: auto; display: block; }
.hero h1 { margin: 0 0 1rem; }
.hero p.lede { margin-bottom: 1.5rem; }

@media (max-width: 860px) {
  .hero-home .hero-inner, .hero-split .hero-inner { grid-template-columns: 1fr; }
  .hero-home .hero-graphic, .hero-split .hero-graphic { display: none; }
}

.route-divider { display: flex; align-items: center; gap: 0.4rem; margin: 0 0 2.5rem; color: var(--color-border); }
.route-divider::before, .route-divider::after { content: ""; flex: 1; border-top: 1px dashed var(--color-border); }
.route-divider .node { width: 5px; height: 5px; border-radius: 50%; background: var(--color-amber); flex: none; opacity: 0.7; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-block; padding: 0.6rem 1.1rem; border-radius: var(--radius);
  background: var(--color-amber); color: #191307; font-family: var(--font-mono);
  font-weight: 700; font-size: 0.85rem; border: 1px solid var(--color-amber);
  transition: box-shadow 0.15s ease, transform 0.15s ease, opacity 0.15s ease;
}
.btn:hover { text-decoration: none; opacity: 0.92; transform: translateY(-1px); }
.btn:not(.btn-outline):hover { box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-amber) 22%, transparent); }
.btn-outline { background: transparent; border: 1px solid var(--color-border); color: var(--color-text); }
.btn-outline:hover { border-color: var(--color-amber); }

/* ---------- Motion: subtle, deferential to prefers-reduced-motion ---------- */
@media (prefers-reduced-motion: no-preference) {
  .rail-graphic path, .hero-graphic path {
    stroke-dasharray: 220; stroke-dashoffset: 220;
    animation: draw-line 1.6s ease-out forwards;
  }
  .rail-graphic path:nth-child(2n) { animation-delay: 0.12s; }
  .rail-graphic path:nth-child(3n) { animation-delay: 0.24s; }
  .hero-graphic path:nth-child(2n) { animation-delay: 0.1s; }
  .hero-graphic path:nth-child(3n) { animation-delay: 0.22s; }
  .hero-graphic path:nth-child(4n) { animation-delay: 0.34s; }

  .rail-graphic circle {
    animation: node-pulse 5s ease-in-out infinite;
  }
  .rail-graphic circle:nth-child(2n) { animation-delay: -1.7s; }
  .rail-graphic circle:nth-child(3n) { animation-delay: -3.3s; }

  .hero-graphic circle {
    opacity: 0;
    animation: node-in 0.5s ease-out forwards;
    animation-delay: 1.1s;
  }
  .hero-graphic circle:nth-child(2n) { animation-delay: 1.25s; }
  .hero-graphic circle:nth-child(3n) { animation-delay: 1.4s; }

  .hero-home .hero-inner > div:first-child > * {
    animation: rise-in 0.5s ease-out both;
  }
  .hero-home .hero-inner > div:first-child > *:nth-child(2) { animation-delay: 0.08s; }
  .hero-home .hero-inner > div:first-child > *:nth-child(3) { animation-delay: 0.16s; }
}

@keyframes draw-line { to { stroke-dashoffset: 0; } }
@keyframes node-pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.4; } }
@keyframes node-in { to { opacity: 1; } }
@keyframes rise-in { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

/* ---------- Sections ---------- */
main > section, .main-col > section { padding: 2.75rem 0; }
main > section + section, .main-col > section + section { border-top: 1px solid var(--color-border); }
.section-alt { background: var(--color-bg-inset); }
.section-tight { padding: 1.5rem 0; }
.prose { max-width: 62ch; }
.prose h2 { margin-top: 2.25rem; }
.prose p { margin: 0 0 1.15rem; }
.prose ul, .prose ol { margin: 0 0 1.15rem; padding-left: 1.3rem; }
.prose li { margin-bottom: 0.5rem; }

/* ---------- Cards (home page teaser grid) ---------- */
.card-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 1.1rem; margin-top: 1.75rem; }
.card { background: var(--color-bg-raised); border: 1px solid var(--color-border); border-radius: var(--radius); padding: 1.5rem; }
.card h3 { font-style: normal; font-family: var(--font); font-weight: 700; font-size: 1rem; margin-bottom: 0.5rem; }
.card p { color: var(--color-muted); margin-bottom: 1rem; font-size: 0.95rem; }
.card .card-link { font-family: var(--font-mono); font-weight: 600; font-size: 0.82rem; }

/* ---------- Note / callout ---------- */
.note {
  border: 1px solid var(--color-border); border-left: 3px solid var(--color-amber);
  background: var(--color-bg-inset); border-radius: 0 var(--radius) var(--radius) 0;
  padding: 1.1rem 1.4rem; margin: 1.75rem 0;
}
.note p:last-child { margin-bottom: 0; }
.note .note-label { display: block; font-family: var(--font-mono); text-transform: uppercase; letter-spacing: 0.1em; font-size: 0.7rem; font-weight: 700; color: var(--color-amber); margin-bottom: 0.5rem; }
.note-caution { border-left-color: var(--color-red); }
.note-caution .note-label { color: var(--color-red); }

/* ---------- Pills / status tags ---------- */
.pill {
  display: inline-block; font-family: var(--font-mono); font-weight: 600; text-transform: uppercase;
  letter-spacing: 0.04em; font-size: 0.68rem; padding: 0.18rem 0.5rem;
  border: 1px solid var(--color-border); border-radius: var(--radius); color: var(--color-muted);
  white-space: nowrap;
}
.status-shipping { color: var(--color-green); border-color: color-mix(in srgb, var(--color-green) 45%, var(--color-border)); }
.status-active { color: var(--color-amber-bright); border-color: color-mix(in srgb, var(--color-amber) 45%, var(--color-border)); }
.status-experimental { color: var(--color-muted); }
.status-draft { color: var(--color-muted); font-style: italic; }

/* ---------- Directory filter bar ---------- */
.filter-bar { display: flex; flex-wrap: wrap; gap: 0.5rem; align-items: center; margin: 1.5rem 0 0.5rem; padding: 1rem 0; }
.filter-bar input[type="search"] {
  flex: 1 1 220px; padding: 0.5rem 0.8rem; border-radius: var(--radius);
  border: 1px solid var(--color-border); background: var(--color-bg-raised);
  color: var(--color-text); font-family: var(--font-mono); font-size: 0.85rem;
}
.filter-bar input[type="search"]:focus { outline: 2px solid var(--color-amber); outline-offset: 1px; }
.filter-chip {
  border: 1px solid var(--color-border); background: transparent; color: var(--color-muted);
  border-radius: var(--radius); padding: 0.4rem 0.75rem; font-size: 0.78rem; cursor: pointer;
  font-family: var(--font-mono); font-weight: 500; transition: border-color 0.15s ease, color 0.15s ease, background 0.15s ease;
}
.filter-chip:hover { border-color: var(--color-amber); color: var(--color-text); }
.filter-chip.is-active { background: var(--color-amber); border-color: var(--color-amber); color: #191307; font-weight: 700; }
.filter-count { color: var(--color-muted); font-size: 0.8rem; font-family: var(--font-mono); margin: 0 0 0.75rem; }

/* ---------- Directory entries: styled like config stanzas ---------- */
.entry-group { padding: 2.25rem 0; }
.entry-group + .entry-group { border-top: 1px solid var(--color-border); }
.entry-group-head { max-width: 64ch; margin-bottom: 1.5rem; }
.entry-group-head h2 { margin-bottom: 0.35rem; display: flex; align-items: center; gap: 0.6rem; }
.entry-group-head p { color: var(--color-muted); margin: 0; font-size: 0.96rem; }
.category-icon { width: 28px; height: 28px; flex: none; opacity: 0.9; }

.entry-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 1rem; }
.entry {
  background: var(--color-bg-raised); border: 1px solid var(--color-border);
  border-radius: var(--radius); padding: 1.25rem 1.4rem;
  display: flex; flex-direction: column; gap: 0.55rem;
}
.entry-top { display: flex; justify-content: space-between; align-items: center; }
.entry-id { font-family: var(--font-mono); font-weight: 600; font-size: 0.72rem; color: var(--color-muted); letter-spacing: 0.05em; }
.entry h3 { margin: 0; font-size: 1.05rem; }
.entry p.maker { color: var(--color-muted); margin: -0.3rem 0 0; font-size: 0.84rem; font-family: var(--font-mono); font-weight: 500; }
.entry p.desc { color: var(--color-text); margin: 0; font-size: 0.93rem; }
.entry .entry-foot { display: flex; justify-content: space-between; align-items: center; gap: 0.75rem; margin-top: auto; padding-top: 0.5rem; border-top: 1px solid var(--color-border); }
.entry .entry-meta { display: flex; align-items: center; gap: 0.6rem; flex-wrap: wrap; }
.entry .entry-verified { font-family: var(--font-mono); font-size: 0.72rem; color: var(--color-muted); white-space: nowrap; }
.entry .entry-link { font-family: var(--font-mono); font-size: 0.8rem; font-weight: 700; display: inline-block; transition: transform 0.15s ease; }
.entry:hover .entry-link { transform: translateX(2px); }
.entry, .card {
  transition: border-color 0.15s ease, transform 0.15s ease, box-shadow 0.15s ease;
}
.entry:hover, .card:hover {
  border-color: var(--color-amber);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px -12px color-mix(in srgb, var(--color-amber) 40%, transparent);
}
.entry[hidden] { display: none; }

/* ---------- Tables ---------- */
.data-table { width: 100%; border-collapse: collapse; margin: 1.5rem 0; font-size: 0.92rem; }
.data-table th, .data-table td { text-align: left; padding: 0.65rem 0.85rem; border-bottom: 1px solid var(--color-border); vertical-align: top; }
.data-table th { color: var(--color-amber); font-family: var(--font-mono); font-weight: 600; font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.06em; }
.data-table td:first-child { font-family: var(--font-mono); color: var(--color-muted); white-space: nowrap; }
.data-table tr:last-child td { border-bottom: none; }
.table-scroll { overflow-x: auto; }

/* ---------- Traceroute-style history list ---------- */
.traceroute { list-style: none; margin: 1.75rem 0 0; padding: 0; border-left: 1px dashed var(--color-border); }
.traceroute li { position: relative; padding: 0 0 2rem 2rem; }
.traceroute li::before {
  content: attr(data-hop); position: absolute; left: -1.05rem; top: -0.05rem;
  width: 2rem; height: 1.3rem; display: flex; align-items: center; justify-content: center;
  font-family: var(--font-mono); font-size: 0.68rem; font-weight: 700; color: var(--color-bg);
  background: var(--color-amber); border-radius: var(--radius);
}
.traceroute .era { font-family: var(--font-mono); color: var(--color-amber); font-size: 0.8rem; display: block; margin-bottom: 0.3rem; }
.traceroute h3 { margin: 0 0 0.35rem; }
.traceroute p { color: var(--color-muted); margin: 0; max-width: 58ch; font-size: 0.94rem; }

/* ---------- Contact list ---------- */
.contact-methods { list-style: none; padding: 0; display: flex; flex-direction: column; gap: 0.6rem; font-family: var(--font-mono); font-size: 0.95rem; }

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--color-border); padding: 2rem 0 2.5rem; margin-top: auto; }
.site-footer .wrap { display: flex; justify-content: space-between; gap: 1.5rem; flex-wrap: wrap; }
.site-footer p { color: var(--color-muted); margin: 0.3rem 0; font-size: 0.85rem; }
.footer-disclosure { max-width: 42ch; }
.footer-links { display: flex; list-style: none; padding: 0; margin: 0; flex-wrap: wrap; font-family: var(--font-mono); }
.footer-links li:not(:last-child)::after { content: "·"; margin: 0 0.75rem; color: var(--color-border); }
.footer-links a { color: var(--color-amber); font-size: 0.82rem; }

@media (max-width: 640px) {
  .site-footer .wrap { flex-direction: column; }
}