/* One stylesheet, no import, no web font: the page must render identically
   whether or not anything outside this repository answers. The palette is the
   one the OG card is drawn with — ink #0d0e13, brass #b0945c — so the link
   preview and the page it opens look like the same project. */

:root {
  --ink: #0d0e13;
  --raised: #14161d;
  --line: #23262f;
  --text: #e9eaf0;
  --dim: #8c92a6;
  --brass: #b0945c;
  --brass-bright: #cfae6f;

  --measure: 68ch;
  --wrap: 62rem;

  /* The system stack: what the reader already has, drawn the way their
     platform draws it. Nothing to download, nothing to wait for. */
  --sans:
    -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
}

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

html {
  scroll-behavior: smooth;
}

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

body {
  margin: 0;
  background: var(--ink);
  color: var(--text);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Reading measure: a paragraph that runs the full width of a desktop window
   is a paragraph nobody finishes. */
p,
li > p {
  max-width: var(--measure);
}

a {
  color: var(--brass-bright);
  text-decoration-color: rgba(176, 148, 92, 0.45);
  text-underline-offset: 0.15em;
}

a:hover {
  text-decoration-color: var(--brass-bright);
}

:focus-visible {
  outline: 2px solid var(--brass-bright);
  outline-offset: 3px;
  border-radius: 2px;
}

.skip {
  position: absolute;
  left: -9999px;
}

.skip:focus {
  left: 1rem;
  top: 1rem;
  z-index: 10;
  background: var(--raised);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0.6rem 1rem;
}

/* ---------------------------------------------------------------- hero -- */

.hero {
  padding: 5rem 0 3.5rem;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(60rem 28rem at 20% -10%, rgba(176, 148, 92, 0.13), transparent 65%),
    var(--ink);
}

.eyebrow {
  margin: 0 0 1.25rem;
  color: var(--dim);
  font-size: 0.82rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.hero h1 {
  margin: 0;
  font-size: clamp(3rem, 11vw, 5.5rem);
  line-height: 1;
  letter-spacing: -0.02em;
  font-weight: 700;
}

.lead {
  margin: 0.75rem 0 1.5rem;
  font-size: clamp(1.15rem, 3.2vw, 1.5rem);
  color: var(--brass);
  font-weight: 500;
}

.blurb {
  margin: 0 0 2rem;
  color: var(--dim);
  font-size: 1.02rem;
}

.blurb em {
  color: var(--text);
  font-style: italic;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin: 0 0 2rem;
  max-width: none;
}

.button {
  display: inline-block;
  padding: 0.7rem 1.4rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--raised);
  color: var(--text);
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
}

.button:hover {
  border-color: var(--brass);
  color: var(--brass-bright);
}

.button.primary {
  background: var(--brass);
  border-color: var(--brass);
  color: #17130b;
}

.button.primary:hover {
  background: var(--brass-bright);
  border-color: var(--brass-bright);
  color: #17130b;
}

.note {
  margin: 0;
  padding: 0.9rem 1.1rem;
  border-left: 3px solid var(--brass);
  border-radius: 0 6px 6px 0;
  background: rgba(176, 148, 92, 0.07);
  color: var(--dim);
  font-size: 0.94rem;
}

.note strong {
  color: var(--text);
}

/* ------------------------------------------------------------ sections -- */

main section {
  padding: 4rem 0 1rem;
}

main section + section {
  border-top: 1px solid var(--line);
}

h2 {
  margin: 0 0 1.25rem;
  font-size: clamp(1.6rem, 4.5vw, 2.1rem);
  letter-spacing: -0.01em;
}

h3 {
  margin: 0 0 0.5rem;
  font-size: 1.05rem;
  letter-spacing: 0;
}

.intro {
  color: var(--dim);
  margin-top: 0;
}

/* --------------------------------------------------------------- code --- */

pre {
  margin: 1.75rem 0;
  padding: 1.25rem 1.4rem;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--raised);
  overflow-x: auto;
  font-size: 0.9rem;
  line-height: 1.75;
}

pre code {
  font-family: var(--mono);
  color: var(--text);
  white-space: pre;
}

/* The trailing explanations in the sample session are commentary, not
   something to be typed. They read as such. */
pre .c {
  color: var(--dim);
}

code {
  font-family: var(--mono);
  font-size: 0.9em;
  color: var(--brass-bright);
}

/* ---------------------------------------------------------------- grid -- */

.grid {
  list-style: none;
  margin: 2rem 0 1rem;
  padding: 0;
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(17rem, 1fr));
}

.grid li {
  padding: 1.3rem 1.4rem;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--raised);
}

.grid h3 {
  color: var(--brass);
}

.grid p {
  margin: 0;
  color: var(--dim);
  font-size: 0.94rem;
  max-width: none;
}

/* ------------------------------------------------------------ timeline -- */

.timeline {
  list-style: none;
  margin: 2rem 0 2.5rem;
  padding: 0 0 0 1.75rem;
  border-left: 1px solid var(--line);
  counter-reset: milestone;
}

.timeline li {
  position: relative;
  padding: 0 0 2rem;
}

.timeline li:last-child {
  padding-bottom: 0;
}

/* The dot on the line. Hollow for what is still ahead, filled for what is
   done, brass and ringed for the one being worked on — the state of the
   project readable without reading a word. */
.timeline li::before {
  content: "";
  position: absolute;
  left: calc(-1.75rem - 5px);
  top: 0.55rem;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--line);
}

.timeline li.done::before {
  background: var(--dim);
  border-color: var(--dim);
}

.timeline li.next::before {
  background: var(--brass);
  border-color: var(--brass);
  box-shadow: 0 0 0 4px rgba(176, 148, 92, 0.18);
}

.timeline h3 {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.6rem;
  margin-bottom: 0.4rem;
  font-size: 1.1rem;
  color: var(--dim);
}

.timeline li.done h3,
.timeline li.next h3 {
  color: var(--text);
}

.tag {
  font-family: var(--mono);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--brass);
  border: 1px solid rgba(176, 148, 92, 0.4);
  border-radius: 5px;
  padding: 0.1rem 0.45rem;
}

.state {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--dim);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.05rem 0.55rem;
}

.timeline li.next .state {
  color: var(--brass);
  border-color: rgba(176, 148, 92, 0.4);
}

.timeline p {
  margin: 0;
  color: var(--dim);
  font-size: 0.96rem;
}

.timeline strong {
  color: var(--text);
}

/* -------------------------------------------------------------- footer -- */

footer {
  margin-top: 3rem;
  padding: 2.5rem 0 3.5rem;
  border-top: 1px solid var(--line);
  color: var(--dim);
  font-size: 0.9rem;
}

footer p {
  margin: 0 0 0.5rem;
}

.quiet {
  color: #5f6478;
  font-size: 0.85rem;
}

/* --------------------------------------------------------------- small -- */

@media (max-width: 40rem) {
  body {
    font-size: 16px;
  }

  .hero {
    padding: 3.5rem 0 2.5rem;
  }

  main section {
    padding: 3rem 0 0.5rem;
  }

  pre {
    font-size: 0.82rem;
    padding: 1rem;
  }
}

/* A light-mode reader gets the dark page anyway: it is one deliberate design,
   the OG card matches it, and a second palette is a second thing to keep
   right. Only the print sheet inverts, so a printed page is not a black
   rectangle. */
@media print {
  body {
    background: #fff;
    color: #000;
  }

  .hero,
  .grid li,
  pre {
    background: #fff;
    border-color: #ccc;
  }

  .blurb,
  .grid p,
  .timeline p,
  .intro,
  footer,
  .quiet {
    color: #333;
  }

  .actions,
  .skip {
    display: none;
  }
}