:root {
  --font-serif: "IBM Plex Serif", "Iowan Old Style", "Palatino Linotype", Georgia, serif;
  --font-mono: "IBM Plex Mono", "SFMono-Regular", "Menlo", "Consolas", monospace;
  --font-sans: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", Helvetica, Arial, sans-serif;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-md: 1.125rem;
  --text-lg: 1.375rem;
  --text-xl: 1.75rem;
  --text-2xl: 2.25rem;
  --text-3xl: 3rem;
  --text-4xl: 4rem;
  --paper: #FCFBF7;
  --paper-2: #F4F2EA;
  --paper-3: #EAE7DC;
  --ink: #1A1A17;
  --ink-2: #3D3D38;
  --ink-3: #6B6B62;
  --ink-4: #9A9A8E;
  --rule: #1A1A17;
  --rule-soft: #CFCBBE;
  --rule-faint: #E3E0D5;
  --accent: #1F7A4B;
  --accent-ink: #155A37;
  --accent-wash: #E6F0E8;
  --link: #143C8C;
  --link-visited: #5A2A86;
  --danger: #9A2B22;
  --inverse-bg: #16160F;
  --inverse-fg: #F2EFE3;
  --inverse-dim: #A6A292;
  --inverse-green: #5FD08A;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4rem;
  --space-9: 6rem;
  --space-10: 8rem;
  --gutter: 1.5rem;
  --content-max: 1080px;
  --wide-max: 1280px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
}

body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-serif);
  font-size: var(--text-base);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

::selection {
  background: var(--accent-wash);
}

a {
  color: inherit;
  text-decoration: underline;
  text-underline-offset: 2px;
  text-decoration-thickness: 1px;
  text-decoration-color: var(--ink-4);
}

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

.a--retro {
  color: var(--link);
  text-decoration-color: currentColor;
}

.a--retro:visited {
  color: var(--link-visited);
}

.container {
  max-width: var(--wide-max);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.container--narrow {
  max-width: var(--content-max);
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin: 0;
}

.cursor {
  display: inline-block;
  width: 0.5em;
  height: 1em;
  background: var(--ink);
  transform: translateY(0.08em);
  animation: blink 1s steps(1) infinite;
}

@keyframes blink {
  50% {
    opacity: 0;
  }
}

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

.btn {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 500;
  line-height: 1;
  padding: 10px 18px;
  border: 1px solid var(--ink);
  border-radius: 0;
  background: var(--paper);
  color: var(--ink);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  transition: transform .12s ease-out, box-shadow .12s ease-out, background .12s, color .12s;
}

.btn:hover {
  text-decoration: none;
}

.btn--primary {
  background: var(--ink);
  color: var(--paper);
  box-shadow: 4px 4px 0 0 var(--ink);
}

.btn--primary:active {
  transform: translate(2px, 2px);
  box-shadow: 2px 2px 0 0 var(--ink);
}

.btn--accent {
  border-color: var(--accent-ink);
  color: var(--accent-ink);
  box-shadow: 4px 4px 0 0 var(--accent-ink);
}

.btn--accent:active {
  transform: translate(2px, 2px);
  box-shadow: 2px 2px 0 0 var(--accent-ink);
}

.btn--sm {
  padding: 8px 14px;
  font-size: 13px;
  white-space: nowrap;
}

.btn .icn svg {
  width: 15px;
  height: 15px;
}

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

.tag {
  font-family: var(--font-mono);
  font-size: 12px;
  padding: 2px 8px;
  border-radius: 2px;
  white-space: nowrap;
  border: 1px solid var(--ink);
  color: var(--ink);
}

.tag--ghost {
  color: var(--ink-3);
  border-color: var(--rule-soft);
}

.tag--accent {
  color: var(--accent-ink);
  border-color: var(--accent-ink);
  background: var(--accent-wash);
}

.masthead {
  border-bottom: 1px solid var(--ink);
  background: var(--paper);
  position: sticky;
  top: 0;
  z-index: 10;
}

.masthead__inner {
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.wordmark {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 20px;
  letter-spacing: -0.01em;
  display: inline-flex;
  align-items: center;
  line-height: 1;
  text-decoration: none;
}

.wordmark .cursor {
  margin-right: 0.18em;
}

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

.nav {
  display: flex;
  align-items: center;
  gap: 26px;
}

.nav-link {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--ink-3);
  text-decoration: none;
  white-space: nowrap;
}

.nav-link.is-active {
  color: var(--ink);
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-color: var(--ink);
}

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

.hero__grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
}

.hero__lead {
  padding: var(--space-9) var(--space-7) var(--space-9) 0;
  border-right: 1px solid var(--ink);
}

.hero h1 {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: var(--text-4xl);
  line-height: 1.04;
  letter-spacing: -0.015em;
  margin: 20px 0 0;
}

.hero__sub {
  display: block;
}

.hero__actions {
  display: flex;
  gap: 16px;
  margin-top: 36px;
  flex-wrap: wrap;
}

.terminal {
  background: var(--inverse-bg);
  color: var(--inverse-fg);
  padding: var(--space-7);
  font-family: var(--font-mono);
  font-size: 13.5px;
  line-height: 1.85;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.terminal .p {
  color: var(--inverse-green);
}

.terminal .dim {
  color: var(--inverse-dim);
}

.terminal .cursor {
  background: var(--inverse-green);
  width: 0.55em;
  height: 1.05em;
  transform: translateY(0.18em);
}

.principles {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--ink);
  border-left: 1px solid var(--ink);
  display: flex;
  flex-direction: column;
}

.principle {
  border-right: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
  padding: var(--space-6);
}

.principle__glyph {
  font-family: var(--font-mono);
  font-size: 30px;
  font-weight: 700;
  color: var(--accent-ink);
}

.principle h3 {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 21px;
  margin: 16px 0 8px;
}

.principle p {
  font-size: 15px;
  line-height: 1.55;
  color: var(--ink-2);
  margin: 0;
}

.section {
  padding-top: var(--space-8);
  padding-bottom: var(--space-8);
}

.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  border-bottom: 1px solid var(--ink);
  padding-bottom: 12px;
}

.section-head h2 {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: var(--text-2xl);
  margin: 0;
}

.section-head a {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--ink-2);
}

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

.post-list li {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  padding: 18px 0;
  border-bottom: 1px solid var(--rule-faint);
}

.post-list a {
  text-decoration: none;
}

.post-list .title {
  font-family: var(--font-serif);
  font-size: 19px;
}

.post-list .date {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-3);
  white-space: nowrap;
}

.page-head {
  padding-top: var(--space-8);
}

.page-head h1 {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: var(--text-3xl);
  margin: 12px 0 6px;
  letter-spacing: -0.01em;
}

.page-head .intro {
  font-size: var(--text-md);
  color: var(--ink-2);
  max-width: 56ch;
}

.event-list {
  border-top: 1px solid var(--ink);
  margin-top: 28px;
}

.event {
  display: grid;
  grid-template-columns: 120px 1fr auto;
  gap: 24px;
  padding: var(--space-6) 0;
  border-bottom: 1px solid var(--rule-soft);
  align-items: center;
}

.event__date {
  font-family: var(--font-mono);
  text-align: center;
  border-right: 1px solid var(--rule-faint);
  padding-right: 16px;
}

.event__date .mon {
  font-size: 11px;
  color: var(--ink-3);
  letter-spacing: 0.1em;
}

.event__date .day {
  font-size: 38px;
  font-weight: 700;
  line-height: 1.1;
}

.event__date .time {
  font-size: 12px;
  color: var(--ink-3);
}

.event__tags {
  display: flex;
  gap: 8px;
  margin-bottom: 8px;
  flex-wrap: wrap;
}

.event h3 {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 22px;
  margin: 0 0 6px;
}

.event p {
  font-size: 15px;
  color: var(--ink-2);
  margin: 0;
  max-width: 58ch;
}

.event__where {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-3);
  margin-top: 10px;
}

.wiki {
  display: grid;
  grid-template-columns: 230px 1fr;
  padding-top: var(--space-7);
  padding-bottom: var(--space-8);
}

.wiki__aside {
  border-right: 1px solid var(--ink);
  padding-right: 24px;
  padding-top: 8px;
}

.wiki__aside .eyebrow {
  font-size: 11px;
  margin-bottom: 14px;
}

.wiki__nav {
  display: grid;
  gap: 2px;
}

.wiki__nav a {
  font-family: var(--font-mono);
  font-size: 13px;
  padding: 6px 10px;
  color: var(--ink-2);
  text-decoration: none;
}

.wiki__nav a.is-active {
  color: var(--paper);
  background: var(--ink);
}

.wiki__body {
  padding-left: 48px;
  max-width: 720px;
}

.wiki__meta {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-3);
  margin-bottom: 28px;
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
}

.article-title {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: var(--text-3xl);
  margin: 12px 0 8px;
  letter-spacing: -0.01em;
  line-height: 1.1;
}

kbd {
  font-family: var(--font-mono);
  font-size: 0.8em;
  padding: 1px 6px;
  border: 1px solid var(--rule);
  border-bottom-width: 2px;
  border-radius: 4px;
  background: var(--paper);
}

.form {
  margin-top: 32px;
  display: grid;
  gap: 18px;
  max-width: 620px;
}

.form label.field-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin-bottom: 6px;
}

.form input[type=email] {
  width: 100%;
  font-family: var(--font-mono);
  font-size: 14px;
  padding: 11px 12px;
  border: 1px solid var(--ink);
  border-radius: 2px;
  background: var(--paper);
  color: var(--ink);
}

.form input[type=email]::placeholder {
  color: var(--ink-4);
}

.check {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-sans);
  font-size: 14px;
  cursor: pointer;
}

.check input {
  appearance: none;
  width: 18px;
  height: 18px;
  border: 1px solid var(--ink);
  margin: 0;
  display: inline-grid;
  place-content: center;
  background: var(--paper);
  cursor: pointer;
  flex: none;
}

.check input:checked {
  background: var(--accent);
  border-color: var(--accent);
}

.check input:checked::after {
  content: "✓";
  color: #fff;
  font-family: var(--font-mono);
  font-size: 13px;
}

.form__actions {
  display: flex;
  gap: 14px;
  align-items: center;
  flex-wrap: wrap;
  margin-top: 6px;
}

.form__note {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-3);
}

.footer {
  background: var(--inverse-bg);
  color: var(--inverse-fg);
  margin-top: var(--space-10);
}

.footer__inner {
  padding: var(--space-8) 0;
}

.footer__top {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 32px;
}

.footer__brand {
  max-width: 360px;
}

.footer__brand .wm {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 18px;
}

.footer__brand .wm .accent {
  color: var(--inverse-green);
}

.footer__brand p {
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.7;
  color: var(--inverse-dim);
  margin-top: 14px;
}

.footer__cols {
  display: flex;
  gap: 56px;
}

.footer__col h4 {
  color: var(--inverse-green);
  letter-spacing: 0.1em;
  margin: 0 0 12px;
  font-size: 11px;
  font-family: var(--font-mono);
  font-weight: 500;
  text-transform: uppercase;
}

.footer__col ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 9px;
}

.footer__col a {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--inverse-fg);
  text-decoration: none;
}

.footer__bottom {
  border-top: 1px solid #333228;
  margin-top: 40px;
  padding-top: 20px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--inverse-dim);
}

.footer__bottom .p {
  color: var(--inverse-green);
}

@media (max-width: 860px) {
  .hero__grid {
    grid-template-columns: 1fr;
  }

  .hero__lead {
    border-right: 0;
    padding: var(--space-7) 0;
  }

  .principles {
    grid-template-columns: 1fr;
  }

  .wiki {
    grid-template-columns: 1fr;
  }

  .wiki__aside {
    border-right: 0;
    border-bottom: 1px solid var(--ink);
    padding-right: 0;
    padding-bottom: 16px;
    margin-bottom: 24px;
  }

  .wiki__body {
    padding-left: 0;
  }

  .event {
    grid-template-columns: 90px 1fr;
  }

  .event .btn {
    grid-column: 2;
    justify-self: start;
  }

  .nav {
    gap: 16px;
  }
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --ink: #FCFBF7;
    --ink-2: #F4F2EA;
    --ink-3: #EAE7DC;
    --paper: #1A1A17;
    --paper-2: #3D3D38;
    --paper-3: #6B6B62;
    --ink-4: #9A9A8E;
    --rule: #1A1A17;
    --rule-soft: #CFCBBE;
    --rule-faint: #E3E0D5;
    --inverse-fg: #16160F;
    --inverse-bg: #F2EFE3;
    --inverse-dim: #A6A292;
    --inverse-green: #5FD08A;
  }

  :root:not([data-theme="light"]) .terminal {
    background: var(--inverse-fg);
    color: var(--inverse-bg);
  }
}

:root[data-theme="dark"] {
  --ink: #FCFBF7;
  --ink-2: #F4F2EA;
  --ink-3: #EAE7DC;
  --paper: #1A1A17;
  --paper-2: #3D3D38;
  --paper-3: #6B6B62;
  --ink-4: #9A9A8E;
  --rule: #1A1A17;
  --rule-soft: #CFCBBE;
  --rule-faint: #E3E0D5;
  --inverse-fg: #16160F;
  --inverse-bg: #F2EFE3;
  --inverse-dim: #A6A292;
  --inverse-green: #5FD08A;
}

:root[data-theme="dark"] .terminal {
  background: var(--inverse-fg);
  color: var(--inverse-bg);
}

.theme-toggle {
  font-family: inherit;
  font-size: 1rem;
  line-height: 1;
  background: transparent;
  border: 1px solid transparent;
  cursor: pointer;
  padding: 0.25rem 0.5rem;
  border-radius: 3px;
  color: var(--ink-4);
  transition: color 0.2s, border-color 0.2s;
}

.theme-toggle:hover {
  color: var(--accent);
  border-color: var(--accent);
}

.hero h1 {
  font-family: var(--font-serif);
  font-weight: 700;
  letter-spacing: -0.015em;
  margin: 20px 0 0;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.hero__free {
  font-size: 6rem;
  line-height: 1;
}

.hero__subfree {
  font-size: 2.5rem;
  line-height: 1.1;
  margin-top: 0.1em;
}

.card-list {
  display: grid;
}

.card {
  margin-left: 5%;
  margin-right: 5%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 20px 24px;
  border: 1px solid var(--ink);
  border-top: 0px;
  border-radius: 0px;
  background: var(--paper);
  text-decoration: none;
  color: var(--ink);
  transition: background 0.1s ease-out;
}

.card:hover {
  background: var(--paper-2);
  text-decoration: none;
}

.card:active {
  background: var(--paper-3);
}

.card__body {
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-width: 0;
}

.card__title {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 30px;
  line-height: 1.2;
  color: var(--ink);
  margin: 0;
}

.card__sub {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-3);
  margin: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.card__glyph {
  font-family: var(--font-mono);
  font-size: 65px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1;
  flex-shrink: 0;
  user-select: none;
  display: flex;
  justify-content: space-around;
}

.card--accent .card__glyph {
  color: var(--accent-ink);
}

.card--inverse {
  background: var(--inverse-bg);
  border-color: var(--inverse-bg);
  color: var(--inverse-fg);
}

.card--inverse .card__title {
  color: var(--inverse-fg);
}

.card--inverse .card__sub {
  color: var(--inverse-dim);
}

.card--inverse .card__glyph {
  color: var(--inverse-green);
}

.card--inverse:hover {
  background: #1f1f18;
}

@media (max-width: 860px) {
  .card {
    padding: 16px 18px;
  }

  .card__glyph {
    font-size: 22px;
  }
}


body,
.masthead,
.hero,
.hero__lead,
.terminal,
.card,
.card--inverse,
.btn,
a,
.tag,
input[type="email"],
.check input,
.wiki__body,
.wiki__aside,
.footer,
.nav-link,
.post-list li,
.event,
.form input[type="email"],
::selection {
  transition:
    background-color 0.4s ease,
    color 0.4s ease,
    border-color 0.4s ease,
    box-shadow 0.4s ease;
}

.terminal,
.footer,
.card--inverse {
  transition:
    background-color 0.4s ease,
    color 0.4s ease;
}


body:not(.theme-ready) *,
body:not(.theme-ready)::before,
body:not(.theme-ready)::after {
  transition: none !important;
}
body,
.masthead,
.hero,
.hero__lead,
.terminal,
.card,
.card--inverse,
.btn,
a,
.tag,
input[type="email"],
.check input,
.wiki__body,
.wiki__aside,
.footer,
.nav-link,
.wordmark,
.wordmark .accent,
.post-list li,
.event,
.form input[type="email"],
::selection {
  transition:
    background-color 0.4s ease,
    color 0.4s ease,
    border-color 0.4s ease,
    box-shadow 0.4s ease;
}

.terminal,
.terminal .p,
.terminal .dim,
.terminal .cursor,
.footer,
.card--inverse {
  transition:
    background-color 0.4s ease,
    color 0.4s ease;
}


body:not(.theme-ready) *,
body:not(.theme-ready)::before,
body:not(.theme-ready)::after {
  transition: none !important;
}