@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=JetBrains+Mono:wght@400;500;700&display=swap');

:root {
  --max-width: 1180px;
  --ink: #1A1B2E;
  --ink-soft: #565973;
  --paper: #FFFFFF;
  --paper-soft: #F1F1F8;
  --rule: #E1E1F0;
  --primary: #4338CA;
  --primary-dark: #2E2A85;
  --primary-light: #ECEBFB;
  --wire: #65A30D;
  --wire-dark: #4D7C0F;
  --wire-light: #ECFCCB;
  --panel-bg: #14152B;
  --panel-ink: #E4E4F7;
  --panel-rule: #2E2F4E;
  --radius: 10px;
  --radius-sm: 6px;
  --font-body: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'SFMono-Regular', Consolas, monospace;
}

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.7;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--ink);
}

h1 { font-size: clamp(1.9rem, 4vw, 2.6rem); margin: 0 0 0.75rem; }
h2 { font-size: clamp(1.5rem, 3vw, 1.9rem); margin: 2.5rem 0 1rem; }
h3 { font-size: 1.2rem; margin: 1.5rem 0 0.75rem; }

p { margin: 0 0 1rem; }
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

ul, ol { padding-left: 1.3rem; margin: 0 0 1rem; }
li { margin-bottom: 0.4rem; }

code, .mono { font-family: var(--font-mono); }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

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

svg.icon { width: 22px; height: 22px; flex-shrink: 0; stroke: currentColor; }

/* Header: dark schematic bar, numbered mono nav tags (matches call-path panel identity) */
.net-header {
  background: var(--panel-bg);
  border-bottom: 1px solid var(--panel-rule);
  position: sticky;
  top: 0;
  z-index: 50;
}
.net-header__inner {
  height: 62px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.net-brand {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--font-mono);
  font-weight: 600;
  color: #fff;
  font-size: 0.98rem;
  letter-spacing: -0.01em;
}
.net-brand__mark { height: 30px; width: 30px; display: block; border-radius: 6px; flex-shrink: 0; }
.net-brand__accent { color: var(--wire); }
.net-nav__list {
  display: none;
  list-style: none;
  margin: 0;
  padding: 0;
  align-items: center;
  gap: 1.4rem;
}
.net-nav__list a {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  color: #B9BBDB;
  font-weight: 500;
  font-size: 0.88rem;
}
.net-nav__list a:hover { color: #fff; text-decoration: none; }
.net-nav__tag {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  color: var(--wire);
  background: rgba(101, 163, 13, 0.16);
  border: 1px solid rgba(101, 163, 13, 0.4);
  border-radius: 4px;
  padding: 0.05rem 0.35rem;
  line-height: 1.5;
}
.net-nav__about {
  color: #fff !important;
  border: 1px solid var(--panel-rule);
  border-radius: 999px;
  padding: 0.35rem 0.9rem;
}
.net-nav__list a[data-nav-active="true"] { color: #fff; }
.net-nav__list a[data-nav-active="true"] .net-nav__tag { background: rgba(101, 163, 13, 0.32); }
.net-nav-toggle {
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  font-family: var(--font-mono);
  color: var(--wire);
  font-size: 1rem;
  letter-spacing: 0.05em;
  display: flex;
  align-items: center;
}

@media (min-width: 768px) {
  .net-nav-toggle { display: none; }
  .net-nav__list { display: flex; }
}
@media (max-width: 767px) {
  .net-nav__list {
    position: absolute;
    top: 62px; left: 0; right: 0;
    background: var(--panel-bg);
    border-bottom: 1px solid var(--panel-rule);
    flex-direction: column;
    align-items: flex-start;
    padding: 1rem 1.5rem;
    gap: 0.9rem;
  }
  .net-nav__list.is-open { display: flex; }
  .net-nav__about { border: none; padding: 0; }
}

/* Footer */
.site-footer {
  background: var(--panel-bg);
  color: #B9BBDB;
  padding: 2.5rem 0 1.5rem;
  margin-top: 3rem;
}
.site-footer__inner { display: flex; flex-direction: column; gap: 1rem; }
.site-footer__brand { display: flex; align-items: center; gap: 0.5rem; font-weight: 700; color: #fff; }
.site-logo__mark { border-radius: 6px; }
.site-footer__note { font-size: 0.9rem; max-width: 720px; color: #9497C4; }
.site-footer__links { display: flex; flex-wrap: wrap; gap: 1.25rem; }
.site-footer__links a { color: #B9BBDB; font-size: 0.9rem; }
.site-footer__copy { font-size: 0.85rem; color: #6C6F9C; margin: 0; }

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
}