/* Steledger — one stylesheet, no framework. */

:root {
  --stone: #eeece6;
  --surface: #f6f5f1;
  --ink: #1b1e1c;
  --ink-soft: #52564f;
  --ink-faint: #85897f;
  --line: #cfccc2;
  --patina: #3f6e5e;
  --patina-deep: #2c4f44;
  --patina-tint: #e4ece8;

  --font-serif: Georgia, "Iowan Old Style", "Palatino Linotype", "Times New Roman", serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, "SF Mono", "Cascadia Code", "Roboto Mono", Menlo, Consolas, monospace;

  --content-width: 42rem;

  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --stone: #14161a;
    --surface: #1b1e22;
    --ink: #e8e6df;
    --ink-soft: #a7ac9f;
    --ink-faint: #6d7268;
    --line: #2b2f2b;
    --patina: #6fae98;
    --patina-deep: #8fc7b0;
    --patina-tint: #1c2a24;
  }
}

* {
  box-sizing: border-box;
}

html {
  color-scheme: light dark;
}

body {
  margin: 0;
  background: var(--stone);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 1.0625rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 {
  font-family: var(--font-serif);
  font-weight: 400;
  line-height: 1.2;
  margin: 0 0 0.5em;
}

p {
  margin: 0 0 1em;
}

a {
  color: var(--patina);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.15em;
}

a:hover {
  color: var(--patina-deep);
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--patina);
  outline-offset: 2px;
}

::selection {
  background: var(--patina-tint);
}

code {
  font-family: var(--font-mono);
  font-size: 0.92em;
}

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

/* skip link */

.skip-link {
  position: absolute;
  left: -999px;
  top: auto;
  background: var(--surface);
  color: var(--ink);
  padding: 0.5em 1em;
  border: 1px solid var(--line);
  z-index: 10;
}

.skip-link:focus {
  left: 1rem;
  top: 1rem;
}

/* header */

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--line);
}

.wordmark {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-serif);
  font-size: 1.15rem;
  color: var(--ink);
  text-decoration: none;
}

.wordmark:hover {
  color: var(--ink);
}

.site-nav {
  display: flex;
  gap: 1.5rem;
}

/* main column */

main {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 3rem 1.5rem 4rem;
}

.hero h1 {
  font-size: 2.5rem;
  letter-spacing: -0.01em;
}

.hero .lead {
  font-size: 1.2rem;
  color: var(--ink-soft);
  max-width: 34em;
}

.section {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--line);
}

.section h2 {
  font-size: 1.4rem;
  margin-bottom: 1em;
}

.section h3 {
  font-size: 1.05rem;
  font-family: var(--font-sans);
  font-weight: 700;
  margin-bottom: 0.35em;
}

/* capabilities list */

.capabilities {
  list-style: none;
  margin: 0;
  padding: 0;
}

.capabilities li {
  display: flex;
  gap: 1rem;
  padding: 1rem 0;
}

.capabilities li + li {
  border-top: 1px solid var(--line);
}

.capabilities .num {
  flex: 0 0 2.25rem;
  font-family: var(--font-serif);
  font-size: 1.2rem;
  color: var(--patina);
}

.capabilities p {
  margin: 0;
  color: var(--ink-soft);
}

/* connect blocks */

.connect-block {
  padding: 1.25rem 0;
}

.connect-block + .connect-block {
  border-top: 1px solid var(--line);
}

.connect-block p {
  color: var(--ink-soft);
}

.connect-block .caption {
  font-size: 0.9rem;
  color: var(--ink-faint);
  margin-top: 0.5em;
}

pre {
  margin: 0.75em 0;
  padding: 0.9rem 1rem;
  background: var(--surface);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  overflow-x: auto;
}

pre code {
  color: var(--ink);
  white-space: pre;
}

/* link list */

.link-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.link-list li {
  padding: 0.6rem 0;
}

.link-list li + li {
  border-top: 1px solid var(--line);
}

/* footer */

.site-footer {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 2.5rem 1.5rem 3rem;
  border-top: 1px solid var(--line);
}

.footer-links {
  list-style: none;
  margin: 0 0 1rem;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0 1.25rem;
  font-size: 0.9rem;
}

.fineprint {
  font-size: 0.85rem;
  color: var(--ink-faint);
  margin: 0;
}

@media (max-width: 600px) {
  .hero h1 {
    font-size: 2rem;
  }

  .site-header,
  main,
  .site-footer {
    padding-left: 1.25rem;
    padding-right: 1.25rem;
  }

  .capabilities li {
    gap: 0.75rem;
  }
}

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