/* icvoss.com: "The Registry" theme.
   An engineering catalogue: paper ground, ink green, one signal accent.
   Display: Fraunces. Labels and code: IBM Plex Mono. Body: Archivo. */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --paper: #F6F1E7;
  --paper-deep: #EFE7D6;
  --ink: #12241B;
  --ink-soft: #3D4F45;
  --green: #0E4B3B;
  --accent: #E8501A;
  --accent-soft: #F8DACB;
  --rule: #C9BFA9;
  --rule-strong: #12241B;

  --font-display: "Fraunces", Georgia, serif;
  --font-body: "Archivo", "Helvetica Neue", sans-serif;
  --font-mono: "IBM Plex Mono", "SFMono-Regular", Menlo, monospace;

  --measure: 72rem;
  --gutter: clamp(1.25rem, 4vw, 3rem);
}

::selection { background: var(--accent); color: var(--paper); }

html { scroll-behavior: smooth; }

body {
  overflow-x: clip;
  font-family: var(--font-body);
  background:
    radial-gradient(115rem 60rem at 85% -10%, rgba(14, 75, 59, 0.07), transparent 60%),
    var(--paper);
  color: var(--ink);
  line-height: 1.6;
  font-size: 1rem;
  -webkit-font-smoothing: antialiased;
}

/* Paper grain */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 40;
  opacity: 0.35;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3CfeColorMatrix values='0 0 0 0 0.07 0 0 0 0 0.14 0 0 0 0 0.11 0 0 0 0.05 0'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)'/%3E%3C/svg%3E");
}

a { color: inherit; }

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

/* ---------- masthead ---------- */

.masthead {
  border-bottom: 2px solid var(--rule-strong);
}

.masthead__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 1.1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  text-decoration: none;
}

.brand__mark { width: 2.4rem; height: 2.4rem; display: block; }

.brand__word {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 0.14em;
}

.brand__word small {
  display: block;
  font-weight: 400;
  font-size: 0.62rem;
  letter-spacing: 0.3em;
  color: var(--ink-soft);
}

.masthead__nav {
  display: flex;
  gap: 1.6rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.masthead__nav a { text-decoration: none; position: relative; padding-block: 0.2rem; }

.masthead__nav a::after {
  content: "";
  position: absolute;
  left: 0; right: 100%;
  bottom: 0;
  height: 2px;
  background: var(--accent);
  transition: right 160ms ease;
}

.masthead__nav a:hover::after { right: 0; }

@media (max-width: 640px) {
  .masthead__inner { flex-direction: column; align-items: flex-start; gap: 0.75rem; }
  .brand__word small { letter-spacing: 0.18em; }
  .masthead__nav { gap: 1.1rem; }
}

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

.hero { border-bottom: 1px solid var(--rule); overflow: hidden; }

.hero__inner {
  padding-block: clamp(3rem, 9vw, 6.5rem) clamp(2.5rem, 7vw, 5rem);
  position: relative;
}

.hero__kicker {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--green);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.hero__kicker::before {
  content: "";
  width: 2.4rem;
  height: 2px;
  background: var(--accent);
}

.hero h1 {
  font-family: var(--font-display);
  font-weight: 620;
  font-variation-settings: "opsz" 90;
  font-size: clamp(2.6rem, 7.2vw, 5.4rem);
  line-height: 1.02;
  letter-spacing: -0.015em;
  max-width: 18ch;
  text-wrap: balance;
}

.hero h1 em {
  font-style: italic;
  color: var(--green);
}

.hero__lede {
  margin-top: 1.6rem;
  max-width: 56ch;
  font-size: clamp(1rem, 1.6vw, 1.15rem);
  color: var(--ink-soft);
}

.hero__cta {
  margin-top: 2.2rem;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
}

.button {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.06em;
  text-decoration: none;
  padding: 0.75rem 1.4rem;
  border: 2px solid var(--rule-strong);
  background: var(--ink);
  color: var(--paper);
  transition: transform 140ms ease, box-shadow 140ms ease, background 140ms ease;
  box-shadow: 4px 4px 0 0 var(--accent);
}

.button:hover {
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0 0 var(--accent);
}

.button--ghost {
  background: transparent;
  color: var(--ink);
  box-shadow: none;
}

.button--ghost:hover {
  background: var(--paper-deep);
  transform: none;
  box-shadow: none;
}

/* Oversized stamp in the hero corner */
.hero__stamp {
  position: absolute;
  right: calc(-1 * clamp(1rem, 4vw, 2rem));
  top: 50%;
  translate: 0 -50%;
  width: clamp(9rem, 22vw, 17rem);
  opacity: 0.16;
  rotate: 8deg;
  pointer-events: none;
}

/* ---------- index ledger ---------- */

.ledger { padding-block: clamp(2.5rem, 6vw, 4.5rem); }

.ledger__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 2rem;
}

.ledger__title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.6rem, 3vw, 2.2rem);
}

.ledger__count {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.pkg-list { list-style: none; border-top: 2px solid var(--rule-strong); }

.pkg {
  display: grid;
  grid-template-columns: 4.5rem 3.4rem 1fr;
  gap: 0 1.5rem;
  padding-block: 1.6rem;
  border-bottom: 1px solid var(--rule);
  position: relative;
  animation: rise 520ms both cubic-bezier(0.2, 0.7, 0.2, 1);
}

.pkg:nth-child(1) { animation-delay: 60ms; }
.pkg:nth-child(2) { animation-delay: 120ms; }
.pkg:nth-child(3) { animation-delay: 180ms; }
.pkg:nth-child(4) { animation-delay: 240ms; }
.pkg:nth-child(5) { animation-delay: 300ms; }
.pkg:nth-child(6) { animation-delay: 360ms; }
.pkg:nth-child(7) { animation-delay: 420ms; }

@keyframes rise {
  from { opacity: 0; transform: translateY(14px); }
  to { opacity: 1; transform: none; }
}

@media (prefers-reduced-motion: reduce) {
  .pkg { animation: none; }
}

.pkg__no {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  color: var(--ink-soft);
  padding-top: 0.5rem;
}

.pkg:hover .pkg__no { color: var(--accent); }

.pkg__body { min-width: 0; }

.pkg__name {
  font-family: var(--font-display);
  font-weight: 640;
  font-size: clamp(1.35rem, 2.6vw, 1.9rem);
  line-height: 1.15;
  text-decoration: none;
  display: inline-block;
  transition: color 140ms ease;
}

.pkg__name:hover { color: var(--green); text-decoration: underline; text-decoration-thickness: 2px; text-underline-offset: 4px; text-decoration-color: var(--accent); }

.pkg__desc {
  margin-top: 0.5rem;
  max-width: 62ch;
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.pkg__meta {
  margin-top: 0.9rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.9rem;
}

.pkg__install {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  background: var(--ink);
  color: var(--paper);
  padding: 0.42rem 0.75rem;
  user-select: all;
  white-space: nowrap;
  overflow-x: auto;
  max-width: 100%;
}

.pkg__install::before { content: "$ "; color: var(--accent); }

.pkg__links {
  display: flex;
  gap: 0.9rem;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.pkg__links a { text-decoration: none; border-bottom: 2px solid var(--rule); padding-bottom: 0.1rem; }
.pkg__links a:hover { border-color: var(--accent); color: var(--green); }

.pkg__logo {
  width: 3.4rem;
  height: 3.4rem;
  margin-top: 0.2rem;
  transition: transform 180ms cubic-bezier(0.2, 0.7, 0.2, 1);
}

.pkg:hover .pkg__logo { transform: rotate(-4deg) scale(1.06); }

@media (max-width: 560px) {
  .pkg { grid-template-columns: 3rem 1fr; }
  .pkg__no { grid-column: 1 / -1; padding-top: 0; margin-bottom: 0.3rem; }
  .pkg__logo { width: 2.6rem; height: 2.6rem; }
}

/* ---------- package detail pages ---------- */

.detail-hero { border-bottom: 1px solid var(--rule); }

.detail-hero__inner { padding-block: clamp(2rem, 5vw, 3.5rem); }

.crumb {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-soft);
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
  margin-bottom: 1.6rem;
}

.crumb a { text-decoration: none; }
.crumb a:hover { color: var(--accent); }

.detail-hero__head {
  display: flex;
  align-items: center;
  gap: 1.4rem;
}

.detail-hero__logo { width: 4.6rem; height: 4.6rem; }
.detail-hero__logo--small { width: 3rem; height: 3rem; }

.detail-hero__name {
  font-family: var(--font-display);
  font-weight: 640;
  font-size: clamp(2rem, 5vw, 3.4rem);
  line-height: 1.05;
  overflow-wrap: anywhere;
}

.detail-hero__name--doc { font-size: clamp(1.6rem, 4vw, 2.6rem); }

.detail-hero__version {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--green);
  margin-top: 0.4rem;
}

.detail-hero__desc {
  margin-top: 1.2rem;
  max-width: 62ch;
  color: var(--ink-soft);
}

.detail-hero .pkg__meta { margin-top: 1.4rem; }

.doc-nav { margin-top: 2rem; border: 1px solid var(--rule); background: var(--paper-deep); padding: 1.2rem 1.4rem; }

.doc-nav__title {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--green);
  margin-bottom: 0.7rem;
}

.doc-nav__section { margin-top: 1rem; }
.doc-nav__section:first-of-type { margin-top: 0; }

.doc-nav__section-title {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin-bottom: 0.45rem;
}

.doc-nav ul {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(15rem, 1fr));
  gap: 0.5rem 1.5rem;
}

.doc-nav li { min-width: 0; }

.doc-nav a {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  text-decoration: none;
  border-bottom: 2px solid var(--rule);
  overflow-wrap: anywhere;
}

.doc-nav a:hover { border-color: var(--accent); color: var(--green); }

/* ---------- rendered markdown ---------- */

.prose {
  padding-block: clamp(2rem, 5vw, 3.5rem);
  max-width: min(var(--measure), 46rem + 2 * var(--gutter));
  font-size: 0.98rem;
}

.prose h1, .prose h2, .prose h3, .prose h4 {
  font-family: var(--font-display);
  font-weight: 620;
  line-height: 1.2;
  margin: 2em 0 0.6em;
}

.prose h1:first-child { margin-top: 0; }
.prose h1 { font-size: 1.9rem; }
.prose h2 { font-size: 1.5rem; border-bottom: 1px solid var(--rule); padding-bottom: 0.3em; }
.prose h3 { font-size: 1.15rem; }

.prose p, .prose ul, .prose ol { margin-bottom: 1em; }
.prose ul, .prose ol { padding-left: 1.4em; }
.prose li { margin-bottom: 0.3em; }

.prose a { color: var(--green); text-decoration-color: var(--accent); text-decoration-thickness: 2px; text-underline-offset: 3px; }

.prose code {
  font-family: var(--font-mono);
  font-size: 0.86em;
  background: var(--paper-deep);
  padding: 0.12em 0.4em;
  border: 1px solid var(--rule);
}

.prose pre {
  background: var(--ink);
  color: var(--paper);
  padding: 1.1rem 1.3rem;
  overflow-x: auto;
  margin-bottom: 1.2em;
}

.prose pre code { background: none; border: none; color: inherit; padding: 0; font-size: 0.84rem; }

.prose table {
  border-collapse: collapse;
  margin-bottom: 1.2em;
  display: block;
  overflow-x: auto;
  font-size: 0.9rem;
}

.prose th, .prose td { border: 1px solid var(--rule); padding: 0.5rem 0.8rem; text-align: left; }
.prose th { font-family: var(--font-mono); font-size: 0.78rem; letter-spacing: 0.08em; text-transform: uppercase; background: var(--paper-deep); }

.prose img { max-width: 100%; }

/* ---------- error pages ---------- */

.error-page { border-bottom: 1px solid var(--rule); }

.error-page__inner {
  padding-block: clamp(4rem, 12vw, 8rem);
  text-align: left;
}

.error-page__stamp {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(3rem, 10vw, 6rem);
  letter-spacing: 0.06em;
  color: var(--accent);
  line-height: 1;
}

.error-page__title {
  font-family: var(--font-display);
  font-weight: 620;
  font-size: clamp(2rem, 5vw, 3.4rem);
  margin-top: 1rem;
}

.error-page__desc {
  margin-top: 1rem;
  max-width: 50ch;
  color: var(--ink-soft);
}

.error-page .hero__cta { margin-top: 2rem; }
.prose blockquote { border-left: 3px solid var(--accent); padding-left: 1rem; color: var(--ink-soft); margin-bottom: 1em; }
.prose hr { border: 0; border-top: 1px solid var(--rule); margin: 2em 0; }

/* ---------- principles strip ---------- */

.tenets {
  background: var(--green);
  color: var(--paper);
  border-block: 2px solid var(--rule-strong);
}

.tenets__inner {
  display: grid;
  gap: 1px;
  background: rgba(246, 241, 231, 0.25);
  grid-template-columns: 1fr;
}

@media (min-width: 720px) {
  .tenets__inner { grid-template-columns: repeat(3, 1fr); }
}

.tenet {
  background: var(--green);
  padding: 1.8rem var(--gutter);
}

.tenet h3 {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent-soft);
  margin-bottom: 0.5rem;
}

.tenet h3::before { content: "// "; color: var(--accent); }

.tenet p { font-size: 0.92rem; opacity: 0.9; max-width: 40ch; }

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

.colophon { padding-block: 2.5rem 3rem; }

.colophon__inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
}

.colophon a { color: inherit; }
.colophon a:hover { color: var(--accent); }