/* myself landing. Same language as (R)Evolution: two inks, Anybody for display, dither for every grey.
   Everything people read is Atkinson Hyperlegible Next; commands and files are Atkinson Hyperlegible Mono. */

@font-face {
  font-family: "Anybody";
  src: url("/assets/fonts/anybody.woff2") format("woff2");
  font-weight: 300 900;
  font-stretch: 50% 150%;
  font-display: swap;
}
@font-face {
  font-family: "Atkinson Hyperlegible Next";
  src: url("/assets/fonts/atkinson-next.woff2") format("woff2");
  font-weight: 200 800;
  font-display: swap;
}
@font-face {
  font-family: "Atkinson Hyperlegible Mono";
  src: url("/assets/fonts/atkinson-mono.woff2") format("woff2");
  font-weight: 200 800;
  font-display: swap;
}

:root {
  --paper: #e4e2db;
  --ink: #141414;
  --font-display: "Anybody", system-ui, sans-serif;
  --font-text: "Atkinson Hyperlegible Next", system-ui, sans-serif;
  --font-code: "Atkinson Hyperlegible Mono", ui-monospace, monospace;
  --pad: clamp(16px, 3vw, 48px);
  --gap-section: clamp(72px, 11vw, 168px);
  --bitmap-w: min(58vw, calc(82svh * 1.21));
  color-scheme: light;
}

*, *::before, *::after { box-sizing: border-box; }
html { background: var(--paper); scroll-behavior: smooth; scroll-padding-top: 16px; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--font-text);
  font-weight: 420;
  font-size: 1.0625rem;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
:focus-visible { outline: 3px solid var(--ink); outline-offset: 4px; }
svg { display: block; }
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration-thickness: 2px; text-underline-offset: 0.18em; }
a:hover { text-decoration-thickness: 4px; }

.skip {
  position: absolute; left: var(--pad); top: -100px; z-index: 20;
  padding: 10px 16px; background: var(--ink); color: var(--paper); font-weight: 700;
}
.skip:focus { top: 8px; }

/* One e-ink flash on load. */
.flash { position: fixed; inset: 0; z-index: 10; background: var(--ink); }
.flash[hidden] { display: none; }

/* ---------- chrome ---------- */
.chrome { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding: 12px var(--pad); }
.mark {
  display: inline-flex; align-items: center; min-height: 44px;
  text-decoration: none;
  font-family: var(--font-display); font-stretch: 150%; font-weight: 860; font-size: 1.5rem; letter-spacing: -0.02em;
}
.chrome-nav { display: flex; gap: clamp(14px, 2.5vw, 32px); }
.chrome-link { display: inline-flex; align-items: center; min-height: 44px; font-weight: 700; font-size: 1rem; }

/* ---------- type ---------- */
.h2 {
  margin: 0 0 0.45em;
  font-family: var(--font-display); font-stretch: 50%; font-weight: 900;
  font-size: clamp(2.75rem, 7.5vw, 6.5rem); line-height: 0.85; letter-spacing: -0.01em;
}
.h3 {
  margin: clamp(48px, 6vw, 80px) 0 16px;
  font-family: var(--font-display); font-stretch: 50%; font-weight: 900;
  font-size: clamp(2rem, 3.4vw, 2.75rem); line-height: 0.9;
}
.lead {
  margin: 0; max-width: 34ch;
  font-weight: 400; font-size: clamp(1.1875rem, 1.7vw, 1.5rem); line-height: 1.3;
}
code {
  font-family: var(--font-code); font-weight: 500; font-size: 0.9em;
  padding: 0.05em 0.3em; outline: 1.5px solid var(--ink); outline-offset: -1.5px;
  overflow-wrap: anywhere;
}
.prose { margin: 0 0 20px; max-width: 66ch; }
.aside { margin: 24px 0 0; max-width: 66ch; font-size: 0.9375rem; }
.list { margin: 0 0 24px; padding-left: 1.25em; max-width: 66ch; }
.list li { margin-bottom: 10px; }
.list li::marker { content: "■  "; font-size: 0.7em; }
.list--ruled { list-style: none; padding: 0; border-top: 4px solid var(--ink); }
.list--ruled li { margin: 0; padding: 14px 0; border-bottom: 2px solid var(--ink); }
.list--ruled li::marker { content: none; }

/* ---------- front ---------- */
.face { display: grid; padding: 0 var(--pad); column-gap: clamp(16px, 2.5vw, 40px); }
.face--front {
  grid-template-columns: var(--bitmap-w) 1fr auto;
  grid-template-areas: "title statement spine";
  align-items: end;
  padding-top: clamp(8px, 2vw, 24px);
}
.title { display: contents; margin: 0; }
.bitmap { display: block; }
.bitmap svg { width: 100%; height: auto; }
.face--front .bitmap { grid-area: title; width: var(--bitmap-w); }
.fallback { font-family: var(--font-display); font-stretch: 50%; font-weight: 900; font-size: 40vw; line-height: 0.8; }

.spine {
  grid-area: spine;
  writing-mode: vertical-rl; transform: rotate(180deg);
  font-family: var(--font-display); font-stretch: 50%; font-weight: 900;
  font-size: calc(var(--bitmap-w) / 1.21 / 4.6);
  line-height: 0.9; letter-spacing: -0.01em;
  align-self: end; user-select: none;
}
.statement {
  grid-area: statement; justify-self: start;
  margin: 0 0 0.2em; max-width: 21ch;
  font-weight: 400; font-size: clamp(1.1875rem, 1.8vw, 1.75rem); line-height: 1.25;
}

/* ---------- demo ---------- */
.demo { padding: clamp(56px, 8vw, 120px) var(--pad) 0; }
.demo .h2 { max-width: 10ch; }
.demo .lead { margin-bottom: clamp(28px, 4vw, 48px); }
.win__controls { display: flex; gap: 6px; flex: none; }
/* A fixed screen, like the terminal it was recorded in; the session scrolls inside it. */
.win--cast { max-width: 1100px; }
.win--cast .win__body {
  height: calc(1.65em * 17 + 2.4em);
  overflow: auto;
  font-size: clamp(0.8125rem, 1.4vw, 1rem);
}
.win--cast .win__body code { font-size: 1em; }
.cursor { display: inline-block; width: 0.6em; height: 1.15em; margin-left: 0.05em; vertical-align: text-bottom; background: var(--ink); }

/* ---------- contents ---------- */
.toc { margin: clamp(56px, 8vw, 112px) var(--pad) 0; max-width: 1100px; padding-top: 14px; border-top: 4px solid var(--ink); }
.toc__h { margin: 0 0 8px; font-weight: 700; font-size: 1rem; }
.toc__list {
  list-style: none; margin: 0; padding: 0;
  display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 15rem), 1fr)); column-gap: clamp(16px, 3vw, 40px);
  counter-reset: toc;
}
.toc__list li { counter-increment: toc; border-bottom: 2px dotted var(--ink); }
.toc__list a {
  display: flex; align-items: center; gap: 0.75em; min-height: 48px;
  font-weight: 700; text-decoration: none;
}
.toc__list a::before { content: counter(toc, decimal-leading-zero); font-family: var(--font-code); font-weight: 400; font-size: 0.875rem; }
.toc__list a:hover { text-decoration: underline; text-decoration-thickness: 3px; }
.toc__more { margin: 18px 0 0; max-width: 70ch; }

/* ---------- story and windows ---------- */
.shell { padding: var(--gap-section) var(--pad) 0; }
.shell .h2 { max-width: 12ch; }
.story { display: grid; gap: clamp(48px, 8vw, 120px); margin-top: clamp(32px, 5vw, 64px); }
.beat { display: grid; align-items: start; column-gap: clamp(24px, 4vw, 64px); row-gap: 20px; min-width: 0; }
.beat__text { min-width: 0; }
.beat__day {
  margin: 0 0 0.2em;
  font-family: var(--font-display); font-stretch: 50%; font-weight: 900;
  font-size: clamp(2rem, 4vw, 3.25rem); line-height: 0.9;
}
.beat__cap { margin: 0 0 0.6em; max-width: 22ch; font-weight: 400; font-size: clamp(1.1875rem, 1.7vw, 1.5rem); line-height: 1.25; }
.beat__sub { margin: 0; max-width: 36ch; font-size: 1rem; line-height: 1.5; }
.beat__sub a { display: inline-block; padding: 10px 0; }
/* Staggered, so the story reads down the page: text left, then window left, then a narrower window. */
@media (min-width: 761px) {
  .beat--mon { grid-template-columns: minmax(0, 4fr) minmax(0, 8fr); }
  .beat--thu { grid-template-columns: minmax(0, 8fr) minmax(0, 4fr); }
  .beat--thu .beat__text { grid-column: 2; grid-row: 1; }
  .beat--thu .win { grid-column: 1; grid-row: 1; }
  .beat--later { grid-template-columns: minmax(0, 3fr) minmax(0, 7fr); margin-left: 8%; }
}

/* A window is a title bar and a ruled body. Terminals have an ink bar, files a paper one. */
.win { margin: 0 0 24px; max-width: 960px; min-width: 0; border: 3px solid var(--ink); background: var(--paper); }
.win__bar { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 5px 5px 5px 14px; }
.win__title { min-width: 0; overflow-wrap: anywhere; font-family: var(--font-code); font-weight: 700; font-size: 0.9375rem; }
.win__sub { margin-left: 0.6em; font-family: var(--font-text); font-weight: 400; }
.win__body { margin: 0; padding: 1.1em 1.2em 1.3em; overflow-x: auto; max-width: 100%; font: inherit; }
.win__body code {
  display: block; outline: none; padding: 0; width: max-content; min-width: 100%; white-space: pre; overflow-wrap: normal;
  font-family: var(--font-code); font-weight: 450;
  font-size: clamp(0.8125rem, 1.4vw, 1rem); line-height: 1.65; tab-size: 2;
}
.win--term { box-shadow: 8px 8px 0 -2px var(--paper), 8px 8px 0 0 var(--ink); margin-bottom: 32px; }
.win--term .win__bar { background: var(--ink); color: var(--paper); }
.win--term .copy { border-color: var(--paper); }
.win--term .copy:hover, .win--term .copy[data-state] { background: var(--paper); color: var(--ink); }
.win--term .copy:focus-visible { outline: 3px solid var(--paper); outline-offset: 2px; }
.win--file { border-width: 2px; }
.win--file .win__bar { border-bottom: 2px dotted var(--ink); }
.win--file .win__title { font-weight: 450; }
.win--file .win__body code { font-weight: 400; }
.win .p { font-weight: 800; margin-right: 0.2em; }
/* Comments and output share the ink; weight, a dotted underline and a bar set them apart. */
.win .c { font-weight: 350; font-style: normal; text-decoration: underline; text-decoration-style: dotted; text-decoration-thickness: 2px; }
.win .o { display: inline-block; padding-left: 1em; border-left: 6px solid var(--ink); font-weight: 400; }
.win__body:focus-visible { outline-offset: -6px; }

.copy {
  flex: none; min-width: 6.5em; min-height: 44px; padding: 0 1em;
  border: 3px solid var(--ink); background: var(--paper); color: var(--ink); cursor: pointer;
  font-family: var(--font-text); font-weight: 700; font-size: 0.9375rem;
}
.copy:hover, .copy[data-state] { background: var(--ink); color: var(--paper); }
.copy[hidden] { display: none; }
.note { margin: 28px 0 0; max-width: 56ch; font-weight: 700; font-size: 1.0625rem; }
.note code { font-weight: 700; }

/* ---------- why ---------- */
.ideas { padding: var(--gap-section) var(--pad) 0; }
.rows { list-style: none; margin: 0; padding: 0; border-top: 4px solid var(--ink); }
.row {
  display: grid;
  grid-template-columns: 56px minmax(0, 22ch) minmax(0, 62ch);
  column-gap: clamp(16px, 3vw, 48px);
  align-items: start;
  padding: 22px 0 24px;
  border-bottom: 2px solid var(--ink);
}
.row__sign { width: 56px; padding-top: 4px; }
.row__sign svg { width: 100%; height: auto; }
.row__title { margin: 0; font-weight: 700; font-size: clamp(1.125rem, 1.6vw, 1.375rem); line-height: 1.25; }
.row__text { margin: 0; max-width: 62ch; }

/* ---------- doc sections: the heading holds the left column, the body reads on the right ---------- */
.doc { padding: var(--gap-section) var(--pad) 0; }
.doc .h2 { font-size: clamp(2.75rem, 6vw, 5rem); }
.doc__body { min-width: 0; max-width: 960px; }
.doc__body > .h3:first-child { margin-top: 0; }
@media (min-width: 1100px) {
  .doc { display: grid; grid-template-columns: minmax(0, 4fr) minmax(0, 9fr); column-gap: clamp(32px, 4vw, 72px); align-items: start; }
  .doc__h { position: sticky; top: 24px; }
}
.status { margin: 0 0 28px; max-width: 46ch; padding-left: 1em; border-left: 6px solid var(--ink); font-weight: 700; }
.steps { list-style: none; margin: 8px 0 8px; padding: 0; display: grid; gap: 28px; }
.step { min-width: 0; }
.step__text { margin: 0 0 14px; max-width: 62ch; }
.step__n {
  display: inline-block; min-width: 1.6em; margin-right: 0.6em; text-align: center;
  background: var(--ink); color: var(--paper);
  font-family: var(--font-code); font-weight: 800;
}
.more { margin: 32px 0 0; font-weight: 700; }
.more a { display: inline-flex; align-items: center; min-height: 44px; }
.shot { margin: 8px 0 12px; max-width: 960px; border: 2px solid var(--ink); }
.shot figcaption { padding: 10px 14px; border-top: 2px dotted var(--ink); font-size: 0.9375rem; }

/* Commands: a ruled table on wide screens, one block per command on narrow ones. */
.cmds { width: 100%; margin: 4px 0 32px; border-collapse: collapse; border-top: 4px solid var(--ink); }
.cmds th { padding: 10px 16px 10px 0; text-align: left; font-weight: 700; font-size: 0.9375rem; border-bottom: 2px solid var(--ink); }
.cmds td { padding: 12px 16px 12px 0; vertical-align: top; border-bottom: 2px dotted var(--ink); }
.cmds td:first-child { width: 48%; }
.cmds td code { outline: none; padding: 0; font-weight: 600; }

/* Molting: the sign in three shells, sparse dither, half dither, solid, under the heading. */
.molt__shells { display: flex; align-items: flex-end; gap: clamp(12px, 2vw, 28px); max-width: 420px; margin: 8px 0 32px; }
.shell-bm { display: block; flex: 14 1 0; min-width: 0; }
.shell-bm:first-child { flex-grow: 6; }
.shell-bm svg { width: 100%; height: auto; }

/* ---------- back ---------- */
.face--back {
  grid-template-columns: auto 1fr var(--bitmap-w);
  grid-template-areas: "spine handover title";
  align-items: end;
  padding-top: var(--gap-section); padding-bottom: var(--pad);
}
.face--back .bitmap { grid-area: title; }
.spine--back { transform: none; }
.handover { grid-area: handover; justify-self: end; text-align: right; }
.handover__lead { margin: 0 0 0.6em auto; max-width: 20ch; font-weight: 400; font-size: clamp(1.1875rem, 1.8vw, 1.75rem); line-height: 1.25; }
.handover__turn {
  margin: 0 0 0.35em;
  font-family: var(--font-display); font-stretch: 50%; font-weight: 900;
  font-size: clamp(3.5rem, 8.5vw, 9rem); line-height: 0.85;
}
.links { margin: 0 0 0.5em; font-weight: 700; font-size: 1.0625rem; }
.links a { display: inline-flex; align-items: center; min-height: 44px; }
.links--small { font-weight: 420; font-size: 0.9375rem; max-width: 36ch; margin-left: auto; }
.links--small a { display: inline; min-height: 0; }

.foot { padding: 20px var(--pad) 32px; border-top: 4px solid var(--ink); margin: 0 var(--pad); padding-left: 0; padding-right: 0; }
.foot__links { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; column-gap: clamp(16px, 3vw, 36px); }
.foot__links a { display: inline-flex; align-items: center; min-height: 44px; font-weight: 700; }
.foot__license { margin: 8px 0 0; font-size: 0.9375rem; }

/* ---------- narrow ---------- */
@media (max-width: 760px) {
  :root { --bitmap-w: calc(100vw - 2 * var(--pad) - 64px); }
  .face--front { grid-template-columns: var(--bitmap-w) 1fr; grid-template-areas: "title spine" "statement statement"; row-gap: 28px; }
  .spine { font-size: calc(var(--bitmap-w) / 1.21 / 4.6); justify-self: end; }
  .row { grid-template-columns: 44px minmax(0, 1fr); row-gap: 8px; }
  .row__sign { width: 44px; grid-row: 1 / 3; }
  .row__title, .row__text { grid-column: 2; }
  .cmds thead { display: none; }
  .cmds, .cmds tbody, .cmds tr, .cmds td { display: block; width: auto; }
  .cmds tr { padding: 12px 0; border-bottom: 2px dotted var(--ink); }
  .cmds td { padding: 0; border: 0; }
  .cmds td:first-child { width: auto; margin-bottom: 4px; }
  .face--back { grid-template-columns: 1fr var(--bitmap-w); grid-template-areas: "handover handover" "spine title"; row-gap: 28px; }
  .handover { justify-self: stretch; }
  .win--cast .win__body { height: calc(1.65em * 20 + 2.4em); }
}
@media (max-width: 420px) {
  .mark { font-size: 1.25rem; }
  .chrome-link { font-size: 0.9375rem; }
  .win--cast .win__sub { display: none; }
  .copy { min-width: 0; padding: 0 0.8em; }
}
@media (min-width: 761px) and (max-width: 1100px) { :root { --bitmap-w: 54vw; } }