@font-face {
  font-family: "Ledger Display";
  src: url("assets/fonts/NotoSerifDisplay-Regular.ttf") format("truetype");
  font-style: normal;
  font-weight: 400;
  font-display: swap;
}

@font-face {
  font-family: "Town Sans";
  src: url("assets/fonts/NotoSans-Regular.ttf") format("truetype");
  font-style: normal;
  font-weight: 400;
  font-display: swap;
}

@font-face {
  font-family: "Town Sans";
  src: url("assets/fonts/NotoSans-Bold.ttf") format("truetype");
  font-style: normal;
  font-weight: 700;
  font-display: swap;
}

:root {
  color-scheme: light;
  --paper: #f3efe3;
  --paper-light: #fbf8ef;
  --paper-deep: #e6dfce;
  --ink: #25382e;
  --ink-soft: #4c5d50;
  --moss: #315b43;
  --rust: #91452f;
  --rule: #b8b19f;
  --focus: #78361f;
  --display: "Ledger Display", Georgia, serif;
  --body: "Town Sans", Arial, sans-serif;
  --page-gutter: clamp(1rem, 5vw, 4.5rem);
}

* {
  box-sizing: border-box;
}

html {
  background: var(--paper);
  color: var(--ink);
  scroll-behavior: smooth;
  scrollbar-color: var(--moss) var(--paper-deep);
  scrollbar-width: thin;
}

body {
  margin: 0;
  min-width: 320px;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--body);
  font-size: 1rem;
  line-height: 1.65;
  caret-color: var(--rust);
}

::selection {
  background: #d5dfce;
  color: #1e3528;
}

::-webkit-scrollbar {
  width: 0.7rem;
}

::-webkit-scrollbar-track {
  background: var(--paper-deep);
}

::-webkit-scrollbar-thumb {
  background: var(--moss);
  border: 2px solid var(--paper-deep);
  border-radius: 1rem;
}

a {
  color: var(--moss);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.22em;
}

a:hover {
  color: var(--rust);
  text-decoration-thickness: 2px;
}

a:focus-visible,
summary:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 4px;
  border-radius: 2px;
}

.skip-link {
  position: absolute;
  z-index: 2;
  top: 0.75rem;
  left: 0.75rem;
  transform: translateY(-160%);
  padding: 0.55rem 0.8rem;
  background: var(--ink);
  color: var(--paper-light);
  font-weight: 700;
}

.skip-link:focus {
  transform: translateY(0);
}

.page-width {
  width: min(100% - 2 * var(--page-gutter), 79rem);
  margin-inline: auto;
}

.masthead {
  width: min(100% - 2 * var(--page-gutter), 79rem);
  min-height: 6.2rem;
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  border-bottom: 1px solid var(--rule);
}

.wordmark {
  display: inline-flex;
  align-items: baseline;
  gap: 0.8rem;
  color: var(--ink);
  text-decoration: none;
}

.wordmark span {
  font-family: var(--display);
  font-size: 1.65rem;
  line-height: 1;
}

.wordmark small {
  color: var(--ink-soft);
  font-size: 0.7rem;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.masthead nav {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(0.8rem, 2vw, 1.8rem);
  align-items: center;
}

.masthead nav a {
  color: var(--ink);
  font-size: 0.88rem;
  font-weight: 700;
  text-decoration: none;
}

.masthead nav a:hover {
  color: var(--rust);
  text-decoration: underline;
  text-underline-offset: 0.28em;
}

.opening {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: clamp(2.5rem, 6vw, 5.5rem);
  align-items: center;
  padding-block: clamp(3.5rem, 8vw, 7.5rem) clamp(4rem, 8vw, 7rem);
}

.opening-copy {
  min-width: 0;
}

h1,
h2,
h3,
p,
figure,
dl,
ol,
ul {
  margin-top: 0;
}

h1,
h2,
h3 {
  color: var(--ink);
  text-wrap: balance;
}

h1 {
  max-width: 13ch;
  margin-bottom: 1.4rem;
  font-family: var(--display);
  font-size: clamp(2.65rem, 4.8vw, 4.6rem);
  font-weight: 400;
  letter-spacing: -0.035em;
  line-height: 0.99;
  animation: ink-settle 580ms cubic-bezier(0.16, 1, 0.3, 1) both;
}

.opening-lede {
  max-width: 40rem;
  margin-bottom: 2rem;
  color: var(--ink-soft);
  font-size: clamp(1.05rem, 1.3vw, 1.2rem);
  line-height: 1.7;
}

.quick-terms {
  margin-bottom: 2rem;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}

.quick-terms > div {
  display: grid;
  grid-template-columns: minmax(7.5rem, 0.75fr) 1.4fr;
  align-items: baseline;
  gap: 0.9rem;
  padding: 0.7rem 0;
  border-bottom: 1px solid #d3cdbd;
}

.quick-terms > div:last-child {
  border-bottom: 0;
}

.quick-terms dt {
  color: var(--ink-soft);
  font-size: 0.78rem;
}

.quick-terms dd {
  margin: 0;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.quick-terms dd span {
  margin-left: 0.35rem;
  color: var(--ink-soft);
  font-size: 0.82rem;
  font-weight: 400;
}

.join-note {
  display: grid;
  grid-template-columns: 0.7rem minmax(0, 1fr);
  gap: 0.85rem;
  align-items: start;
  padding: 1rem 0 0.2rem;
  border-top: 2px solid var(--moss);
}

.live-mark {
  width: 0.62rem;
  height: 0.62rem;
  margin-top: 0.45rem;
  background: var(--moss);
  border-radius: 50%;
}

.join-note h2 {
  margin-bottom: 0.1rem;
  font-family: var(--body);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0;
  line-height: 1.5;
}

.join-note p {
  margin-bottom: 0;
  color: var(--ink-soft);
  font-size: 0.9rem;
}

.server-address {
  display: inline-block;
  margin: 0.35rem 0 0.45rem;
  padding: 0.2rem 0.6rem;
  color: var(--ink);
  background: var(--paper-light);
  border: 1px solid var(--rule);
  font-family: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  user-select: all;
}

.prototype {
  min-width: 0;
  margin: 0;
}

.prototype-image {
  width: 100%;
  aspect-ratio: 8 / 5;
  overflow: hidden;
  background: #cad0c5;
}

.prototype-image img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 50%;
}

.prototype figcaption {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.2rem 1rem;
  padding-top: 0.8rem;
  color: var(--ink-soft);
  font-size: 0.78rem;
  line-height: 1.5;
}

.prototype figcaption span {
  color: var(--ink);
  font-weight: 700;
}

.ledger-section {
  padding-block: clamp(3.5rem, 7vw, 6rem);
  border-top: 1px solid var(--rule);
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(15rem, 0.8fr);
  gap: 2rem;
  align-items: end;
  margin-bottom: 2.5rem;
}

.section-heading h2 {
  max-width: 16ch;
  margin-bottom: 0;
  font-family: var(--display);
  font-size: clamp(2rem, 3.8vw, 3.55rem);
  font-weight: 400;
  letter-spacing: -0.03em;
  line-height: 1.06;
}

.section-heading p {
  max-width: 38rem;
  margin-bottom: 0.2rem;
  color: var(--ink-soft);
}

.loop-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  margin-bottom: 0;
  padding: 0;
  list-style: none;
  counter-reset: loop;
}

.loop-list li {
  min-width: 0;
  padding: 1.15rem clamp(0.8rem, 2vw, 1.8rem) 0 0;
  border-top: 1px solid var(--moss);
  counter-increment: loop;
}

.loop-list li + li {
  padding-left: clamp(0.8rem, 2vw, 1.8rem);
  border-left: 1px solid var(--rule);
}

.loop-list li::before {
  content: "0" counter(loop);
  display: block;
  margin-bottom: 1.1rem;
  color: var(--rust);
  font-size: 0.78rem;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.08em;
}

.loop-list h3 {
  margin-bottom: 0.55rem;
  font-family: var(--display);
  font-size: 1.35rem;
  font-weight: 400;
  line-height: 1.15;
}

.loop-list p {
  margin-bottom: 0;
  color: var(--ink-soft);
  font-size: 0.9rem;
}

.terms-ledger {
  max-width: 63rem;
  margin-bottom: 1.1rem;
  border-top: 1px solid var(--rule);
}

.terms-ledger > div {
  display: grid;
  grid-template-columns: minmax(10rem, 0.7fr) minmax(0, 1.3fr);
  gap: 2rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--rule);
}

.terms-ledger dt {
  color: var(--moss);
  font-weight: 700;
}

.terms-ledger dd {
  max-width: 54ch;
  margin: 0;
}

.terms-footnote {
  max-width: 65ch;
  margin-bottom: 0;
  color: var(--ink-soft);
  font-size: 0.86rem;
}

.rules-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 3rem;
  max-width: 68rem;
  margin-bottom: 0;
  padding: 0;
  list-style: none;
}

.rules-list li {
  padding: 0.85rem 0;
  border-top: 1px solid var(--rule);
}

.faq-list {
  max-width: 68rem;
  border-top: 1px solid var(--rule);
}

.faq-list details {
  border-bottom: 1px solid var(--rule);
}

.faq-list summary {
  position: relative;
  padding: 1.05rem 2.5rem 1.05rem 0;
  color: var(--ink);
  font-family: var(--display);
  font-size: 1.35rem;
  line-height: 1.3;
  cursor: pointer;
  list-style: none;
}

.faq-list summary::-webkit-details-marker {
  display: none;
}

.faq-list summary::after {
  content: "+";
  position: absolute;
  right: 0.3rem;
  top: 0.8rem;
  color: var(--moss);
  font-family: var(--body);
  font-size: 1.5rem;
  font-weight: 400;
}

.faq-list details[open] summary::after {
  content: "−";
}

.faq-list details p {
  max-width: 69ch;
  margin: -0.2rem 2rem 1.1rem 0;
  color: var(--ink-soft);
}

.closing-line {
  padding-block: 2rem 3rem;
  color: var(--moss);
  font-family: var(--display);
  font-size: clamp(1.5rem, 3vw, 2.35rem);
  line-height: 1.2;
  text-align: center;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 1.5rem;
  padding-block: 1.35rem 2rem;
  border-top: 1px solid var(--rule);
  color: var(--ink-soft);
  font-size: 0.75rem;
}

.site-footer p {
  margin-bottom: 0;
}

.site-footer strong {
  color: var(--ink);
  font-family: var(--display);
  font-size: 1rem;
  font-weight: 400;
}

.site-footer span {
  margin-left: 0.6rem;
}

@keyframes ink-settle {
  from {
    opacity: 0.72;
    transform: translateY(0.35rem);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 880px) {
  .opening {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.92fr);
    gap: 2rem;
  }

  h1 {
    font-size: clamp(2.65rem, 5.3vw, 4rem);
  }

  .loop-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.4rem 0;
  }

  .loop-list li:nth-child(3) {
    padding-left: 0;
    border-left: 0;
  }

  .loop-list li:nth-child(4) {
    padding-left: clamp(0.8rem, 2vw, 1.8rem);
    border-left: 1px solid var(--rule);
  }
}

@media (max-width: 640px) {
  .masthead {
    min-height: 0;
    align-items: flex-start;
    flex-direction: column;
    gap: 1rem;
    padding-block: 1.1rem 0.9rem;
  }

  .masthead nav {
    width: 100%;
    gap: 1.2rem;
  }

  .masthead nav a {
    font-size: 0.82rem;
  }

  .opening {
    grid-template-columns: minmax(0, 1fr);
    gap: 2.3rem;
    padding-block: 3rem 3.5rem;
  }

  h1 {
    max-width: 13ch;
    font-size: clamp(2.5rem, 10.6vw, 3.7rem);
  }

  .opening-lede {
    max-width: 38ch;
  }

  .prototype-image img {
    object-position: center 50%;
  }

  .section-heading {
    grid-template-columns: minmax(0, 1fr);
    gap: 0.9rem;
    margin-bottom: 1.8rem;
  }

  .section-heading h2 {
    max-width: 19ch;
  }

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

  .site-footer {
    flex-direction: column;
    gap: 0.55rem;
  }
}

@media (max-width: 420px) {
  .quick-terms > div {
    grid-template-columns: minmax(6.2rem, 0.72fr) 1.4fr;
    gap: 0.55rem;
  }

  .quick-terms dd span {
    display: block;
    margin-left: 0;
  }

  .loop-list {
    grid-template-columns: minmax(0, 1fr);
    gap: 0;
  }

  .loop-list li,
  .loop-list li + li,
  .loop-list li:nth-child(3),
  .loop-list li:nth-child(4) {
    padding: 1rem 0 1.2rem;
    border-left: 0;
    border-bottom: 1px solid var(--rule);
  }

  .loop-list li::before {
    margin-bottom: 0.5rem;
  }

  .loop-list h3 {
    margin-bottom: 0.3rem;
  }

  .terms-ledger > div {
    grid-template-columns: minmax(0, 1fr);
    gap: 0.15rem;
  }

  .site-footer span {
    display: block;
    margin-left: 0;
  }
}

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

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}