:root {
  --ink: #0B0F14;
  --ink-soft: #141A21;
  --paper: #F4F5F2;
  --paper-alt: #EAEBE5;
  --graphite: #20242A;
  --graphite-soft: #6B7178;
  --line: #DAD8D0;
  --line-dark: rgba(244, 245, 242, 0.14);
  --sicap: #348ACA;
  --sicap-light: #89BBE0;
  --sicap-on-light: #235E89;
  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'IBM Plex Sans', sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;
  --maxw: 1200px;
  --gutter: clamp(20px, 5vw, 64px);
  --radius: 3px;
}

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

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--graphite);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  line-height: 1.6;
}

a {
  color: var(--sicap-on-light);
}

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

.wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

:focus-visible {
  outline: 2px solid var(--sicap);
  outline-offset: 3px;
}

/* header */
.site-header {
  background: var(--ink);
  padding: 18px 0;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.wordmark {
  display: flex;
  align-items: center;
  gap: 9px;
  text-decoration: none;
}

.wordmark-logo {
  height: 26px;
  width: auto;
}

.wordmark .nit {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: #8A9098;
  letter-spacing: 0.05em;
}

.back-link {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: #C7CBD1;
  text-decoration: none;
}

.back-link:hover {
  color: var(--sicap-light);
}

/* doc hero */
.doc-hero {
  background: var(--ink);
  color: var(--paper);
  padding: 40px 0 56px;
}

.doc-hero .eyebrow {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--sicap-light);
  display: flex;
  align-items: center;
  gap: 10px;
}

.doc-hero .eyebrow::before {
  content: "";
  width: 18px;
  height: 1.5px;
  background: var(--sicap-light);
  display: inline-block;
}

.doc-hero h1 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.7rem, 3.4vw, 2.5rem);
  margin: 18px 0 12px;
  letter-spacing: -0.01em;
}

.doc-hero p {
  color: #C7CBD1;
  max-width: 60ch;
  font-size: 1rem;
}

.doc-meta {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: #9AA0A6;
  margin-top: 20px;
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}

/* layout */
.doc-layout {
  padding: 56px 0 88px;
}

.doc-grid {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 56px;
  align-items: start;
}

@media (max-width: 900px) {
  .doc-grid {
    grid-template-columns: 1fr;
  }
}

.toc {
  position: sticky;
  top: 24px;
  border-left: 2px solid var(--line);
  padding-left: 20px;
}

.toc h2 {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--graphite-soft);
  margin: 0 0 14px;
}

.toc ol {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: toc;
}

.toc li {
  counter-increment: toc;
  margin-bottom: 10px;
}

.toc a {
  font-size: 0.87rem;
  text-decoration: none;
  color: var(--graphite);
}

.toc a::before {
  content: counter(toc, decimal-leading-zero) "  ";
  font-family: var(--font-mono);
  color: var(--sicap-on-light);
  font-size: 0.78rem;
}

.toc a:hover {
  color: var(--sicap-on-light);
}

@media (max-width: 900px) {
  .toc {
    position: static;
    border-left: none;
    padding-left: 0;
    border-bottom: 1px solid var(--line);
    padding-bottom: 20px;
    margin-bottom: 8px;
  }
}

.doc-body section {
  margin-bottom: 44px;
  scroll-margin-top: 20px;
}

.doc-body h2 {
  font-family: var(--font-display);
  font-size: 1.35rem;
  color: var(--ink);
  margin: 0 0 14px;
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.doc-body h2 .num {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--sicap-on-light);
}

.doc-body h3 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  color: var(--ink);
  margin: 20px 0 8px;
}

.doc-body p {
  margin: 0 0 14px;
  font-size: 0.98rem;
  max-width: 72ch;
}

.doc-body ul,
.doc-body ol {
  margin: 0 0 14px;
  padding-left: 22px;
  max-width: 72ch;
}

.doc-body li {
  margin-bottom: 8px;
  font-size: 0.98rem;
}

.doc-body strong {
  color: var(--ink);
}

.callout {
  background: var(--paper-alt);
  border-left: 3px solid var(--sicap);
  padding: 16px 20px;
  border-radius: var(--radius);
  font-size: 0.92rem;
  color: var(--graphite-soft);
  max-width: 72ch;
  margin: 0 0 14px;
}

.callout strong {
  color: var(--sicap-on-light);
}

.contact-box {
  background: var(--ink);
  color: var(--paper);
  padding: 28px 30px;
  border-radius: var(--radius);
  max-width: 72ch;
  font-family: var(--font-mono);
  font-size: 0.9rem;
}

.contact-box a {
  color: var(--sicap-light);
}

.contact-box div {
  margin-bottom: 8px;
}

/* footer */
.site-footer {
  background: var(--ink);
  color: #9AA0A6;
  padding: 32px 0;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

.footer-inner a {
  color: #C7CBD1;
  text-decoration: none;
}

.footer-inner a:hover {
  color: var(--sicap-light);
}