/* nullrpc landing page (docs/landing.md). Colors, type and spacing follow docs/brand
   (color.md, typography.md); fonts are subsets built by deploy/landing/build-assets.py. */
@font-face {
  font-family: "Space Grotesk";
  src: url("/fonts/sans.woff") format("woff");
  font-style: normal;
  font-weight: 300 700;
  font-display: swap;
}
@font-face {
  font-family: "nullrpc Mono";
  src: url("/fonts/mono.woff") format("woff");
  font-style: normal;
  font-weight: 400;
  font-display: swap;
}

:root {
  color-scheme: dark;
  --nr-bg: #080B10;
  --nr-surface: #111923;
  --nr-text: #F4F7FB;
  --nr-text-secondary: #A7B4C4;
  --nr-accent: #38BDF8;
  --nr-border: #334155;
  --nr-border-strong: #A7B4C4;
  --nr-focus: #38BDF8;
  --nr-button-bg: #38BDF8;
  --nr-button-text: #080B10;
  --nr-status-success: #4ADE80;
  --nr-font-sans: "Space Grotesk", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --nr-font-mono: "nullrpc Mono", "SFMono-Regular", Consolas, monospace;
  --gutter: 48px;
}
@media (prefers-color-scheme: light) {
  :root {
    color-scheme: light;
    --nr-bg: #F4F7FB;
    --nr-surface: #FFFFFF;
    --nr-text: #080B10;
    --nr-text-secondary: #475569;
    --nr-accent: #0369A1;
    --nr-border: #CBD5E1;
    --nr-border-strong: #475569;
    --nr-focus: #0369A1;
    --nr-button-bg: #0369A1;
    --nr-button-text: #FFFFFF;
    --nr-status-success: #166534;
  }
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-padding-top: 24px; }
body {
  margin: 0;
  background: var(--nr-bg);
  color: var(--nr-text);
  font: 400 16px/1.625 var(--nr-font-sans);
}
:focus-visible { outline: 2px solid var(--nr-focus); outline-offset: 3px; }
#main:focus { outline: none; }
a { color: var(--nr-accent); text-underline-offset: 3px; }
code, pre { font-family: var(--nr-font-mono); font-weight: 400; }
p code, dd code { font-size: 0.875em; overflow-wrap: anywhere; }
.num { font-variant-numeric: tabular-nums; }
h1, h2, h3 { margin: 0; font-weight: 500; }

.skip-link {
  position: absolute; left: 16px; top: -64px; z-index: 1; padding: 12px 16px; border-radius: 4px;
  background: var(--nr-button-bg); color: var(--nr-button-text); font-weight: 600;
}
.skip-link:focus { top: 16px; }

.wrap { max-width: 1184px; margin: 0 auto; padding: 0 var(--gutter); }

/* Header. Clear space: x = 1/4 of the symbol tile (24 of 440 units = 10 px at 176 px); the
   brand link's 12 px padding keeps it, and its focus ring sits outside that space. */
.top {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between;
  gap: 16px 32px; padding: 20px 0; border-bottom: 1px solid var(--nr-border);
}
.brand { display: block; margin: -12px; padding: 12px; border-radius: 4px; }
.brand picture, .logo { display: block; }
.logo { width: 176px; height: auto; }
.top-nav { display: flex; flex-wrap: wrap; gap: 4px 24px; }
.top-nav a {
  display: inline-block; padding: 10px 0; color: var(--nr-text); text-decoration: none;
  font-size: 14px; line-height: 20px; font-weight: 500;
}
.top-nav a:hover { color: var(--nr-accent); text-decoration: underline; }

.eyebrow {
  margin: 0 0 16px; color: var(--nr-accent);
  font: 400 12px/18px var(--nr-font-mono); letter-spacing: 0.06em; text-transform: uppercase;
}
.label, .note, .section-note, .network-meta, .facts dt { color: var(--nr-text-secondary); }
.note { margin: 12px 0 0; font-size: 14px; line-height: 20px; }
.note:empty { display: none; }
.note code, .section-note code { color: var(--nr-text); }

/* Hero */
.hero {
  display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); gap: 48px 64px;
  align-items: end; padding: 96px 0 64px;
}
h1 { font-size: 72px; line-height: 76px; letter-spacing: -0.035em; }
.lede { margin: 24px 0 0; font-size: 22px; line-height: 30px; font-weight: 500; letter-spacing: -0.01em; }
.intro { margin: 16px 0 0; max-width: 34em; color: var(--nr-text-secondary); font-size: 18px; line-height: 29px; }
.actions { display: flex; flex-wrap: wrap; gap: 16px 24px; align-items: center; margin-top: 32px; }
.button {
  display: inline-flex; align-items: center; gap: 10px; min-height: 48px; padding: 12px 20px;
  border-radius: 4px; font: 600 15px/20px var(--nr-font-sans); text-decoration: none;
}
.button-primary { background: var(--nr-button-bg); color: var(--nr-button-text); }
.button-primary:hover { text-decoration: underline; text-underline-offset: 3px; }
.button-secondary { padding-left: 0; padding-right: 0; color: var(--nr-text); text-decoration: underline; }
.button-secondary:hover { color: var(--nr-accent); }

.hero-endpoint {
  padding: 24px; background: var(--nr-surface); border: 1px solid var(--nr-border); border-radius: 12px;
}
.label { margin: 0 0 12px; font: 400 12px/18px var(--nr-font-mono); letter-spacing: 0.06em; text-transform: uppercase; }
.endpoint {
  display: flex; align-items: center; gap: 12px; padding: 6px 6px 6px 16px;
  background: var(--nr-bg); border: 1px solid var(--nr-border); border-radius: 8px;
}
.endpoint code { flex: 1; min-width: 0; font-size: 16px; line-height: 24px; overflow-wrap: anywhere; }
.copy {
  flex: none; min-height: 44px; min-width: 72px; padding: 0 16px; border-radius: 4px; cursor: pointer;
  color: var(--nr-text); background: transparent; border: 1px solid var(--nr-border-strong);
  font: 500 14px/1 var(--nr-font-sans);
}
.copy:hover { color: var(--nr-accent); border-color: var(--nr-accent); }

.hero-single { grid-template-columns: minmax(0, 1fr); }

/* Sections */
.section { padding: 64px 0; border-top: 1px solid var(--nr-border); }
.section-head { max-width: 720px; margin-bottom: 32px; }
h2 { font-size: 32px; line-height: 38px; letter-spacing: -0.02em; }
.section-note { margin: 12px 0 0; }
h3 { font-size: 20px; line-height: 28px; font-weight: 600; letter-spacing: -0.01em; }

/* Networks */
.networks { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; margin: 0; padding: 0; list-style: none; }
.network {
  min-width: 0; padding: 24px; background: var(--nr-surface);
  border: 1px solid var(--nr-border); border-radius: 8px;
}
.network-planned { background: transparent; border-style: dashed; }
.network-head { display: flex; align-items: center; gap: 16px; }
.network-head > div { flex: 1; min-width: 0; }
.network-mark { flex: none; display: block; height: 32px; width: auto; color: var(--nr-text); }
.network-meta { margin: 0; font-size: 14px; line-height: 20px; }
.badge {
  flex: none; display: inline-flex; align-items: center; gap: 6px; margin: 0; padding: 4px 10px;
  border: 1px solid currentColor; border-radius: 999px; font: 400 12px/18px var(--nr-font-mono);
}
.badge-live { color: var(--nr-status-success); }
.badge-planned { color: var(--nr-text-secondary); border-style: dashed; }
.facts { margin: 24px 0 0; display: grid; gap: 12px; }
.facts div { display: grid; grid-template-columns: 96px minmax(0, 1fr); gap: 16px; }
.facts dt { font-size: 14px; line-height: 24px; }
.facts dd { margin: 0; min-width: 0; }
.network-links { margin: 20px 0 0; font-size: 14px; }

/* Features */
.features {
  display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 32px;
  margin: 0; padding: 0; list-style: none;
}
.features li { min-width: 0; padding-top: 16px; border-top: 2px solid var(--nr-accent); }
.features p { margin: 8px 0 0; color: var(--nr-text-secondary); }
.features p code { color: var(--nr-text); }

/* Quick start */
.snippets { display: grid; grid-template-columns: minmax(0, 1fr); gap: 16px; max-width: 880px; }
.snippet {
  min-width: 0; margin: 0; background: var(--nr-surface);
  border: 1px solid var(--nr-border); border-radius: 8px;
}
.snippet figcaption {
  display: flex; align-items: center; justify-content: space-between; gap: 12px; min-height: 57px;
  padding: 6px 6px 6px 16px; border-bottom: 1px solid var(--nr-border);
  color: var(--nr-text-secondary); font: 400 12px/18px var(--nr-font-mono); letter-spacing: 0.06em; text-transform: uppercase;
}
.snippet pre { margin: 0; padding: 16px; overflow-x: auto; font-size: 13px; line-height: 21px; }
.copy-status { min-height: 20px; }

/* Footer */
.foot {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 8px 24px;
  padding: 24px 0 40px; border-top: 1px solid var(--nr-border); color: var(--nr-text-secondary); font-size: 14px;
}
.foot p { margin: 0; }
.foot nav { display: flex; flex-wrap: wrap; gap: 4px 24px; }
.foot a { display: inline-block; padding: 10px 0; }

@media (max-width: 1023px) {
  .hero { grid-template-columns: minmax(0, 1fr); padding: 64px 0 48px; }
  .features { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 720px) {
  :root { --gutter: 20px; }
  .top { padding: 16px 0; }
  .top-nav { gap: 4px 20px; }
  .hero { padding: 48px 0 40px; gap: 40px; }
  h1 { font-size: 44px; line-height: 48px; }
  .lede { font-size: 20px; line-height: 28px; }
  .intro { font-size: 16px; line-height: 26px; }
  .hero-endpoint { padding: 16px; }
  .endpoint code { font-size: 14px; }
  .section { padding: 48px 0; }
  h2 { font-size: 28px; line-height: 34px; }
  .networks, .features { grid-template-columns: minmax(0, 1fr); }
  .network { padding: 20px; }
  .network-head { flex-wrap: wrap; }
  .facts div { grid-template-columns: minmax(0, 1fr); gap: 0; }
}
@media (prefers-reduced-motion: no-preference) {
  .copy, .top-nav a, .button-secondary { transition: color 150ms ease-out, border-color 150ms ease-out; }
}