/* Tallyfold: the Exchequer's green baize, hazel tally sticks, and lichen paper. */

:root {
  --lichen: #E9EDE6;
  --paper: #F4F6F1;
  --baize: #1F4A37;
  --ink: #1B3A2D;
  --moss: #4E6852;
  --rule: #C9D3C6;
  --hazel: #C99E58;
  --hazel-light: #DDB874;
  --heartwood: #8A6330;
  --on-baize: #E9EDE6;
  --on-baize-muted: #B7C8BB;

  --display: "Alegreya", Georgia, serif;
  --text: "Alegreya Sans", "Gill Sans", "Segoe UI", sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, Menlo, monospace;

  --measure: 40rem;
  --frame: 72rem;
  --gutter: clamp(1rem, 4vw, 3rem);

  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --lichen: #13291F;
    --paper: #1A3328;
    --baize: #2C6A4F;
    --ink: #E3EAE0;
    --moss: #A9BCAC;
    --rule: #2E4A3D;
    --hazel: #C99E58;
    --hazel-light: #DDB874;
    --heartwood: #6E4B22;
    --on-baize: #F1F5EE;
    --on-baize-muted: #C3D3C6;
    color-scheme: dark;
  }
}

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

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--lichen);
  color: var(--ink);
  font: 400 1.125rem/1.55 var(--text);
  font-kerning: normal;
  text-rendering: optimizeLegibility;
}

a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: 0.18em; }
a:hover { text-decoration-thickness: 2px; }

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

code { font: 500 0.88em/1 var(--mono); }

.skip {
  position: absolute; left: var(--gutter); top: -3rem;
  background: var(--baize); color: var(--on-baize); padding: 0.5rem 0.9rem;
}
.skip:focus { top: 0.75rem; }

/* Header */

.top {
  max-width: var(--frame);
  margin: 0 auto;
  padding: 1.5rem var(--gutter);
  display: flex; align-items: center; justify-content: space-between; gap: 1rem; flex-wrap: wrap;
}
.wordmark {
  display: inline-flex; align-items: center; gap: 0.55rem;
  font: 700 1.35rem/1 var(--display); text-decoration: none; color: var(--baize);
}
.wordmark svg { width: 1.9rem; height: 1.9rem; }
.top nav { display: flex; gap: 1.5rem; font-weight: 500; }
.top nav a { text-decoration: none; color: var(--moss); }
.top nav a:hover { color: var(--ink); text-decoration: underline; }

/* Hero */

main { max-width: var(--frame); margin: 0 auto; padding: 0 var(--gutter); }

.hero { padding: clamp(2rem, 7vw, 5.5rem) 0 2rem; }

h1 {
  margin: 0;
  max-width: 14ch;
  font: 700 clamp(2.9rem, 8.5vw, 6.25rem)/0.98 var(--display);
  letter-spacing: -0.015em;
  color: var(--baize);
}

.lede {
  max-width: var(--measure);
  margin: 1.5rem 0 0;
  font-size: clamp(1.2rem, 2.2vw, 1.4rem);
  line-height: 1.5;
}

.actions { display: flex; flex-wrap: wrap; gap: 0.75rem; margin: 2rem 0 0; }

.button {
  display: inline-block;
  padding: 0.8rem 1.3rem;
  border: 2px solid var(--baize);
  border-radius: 999px;
  background: var(--baize);
  color: var(--on-baize);
  font-weight: 700;
  text-decoration: none;
}
.button:hover { background: var(--ink); border-color: var(--ink); color: var(--lichen); }
.button.quiet { background: transparent; color: var(--baize); }
.button.quiet:hover { background: var(--baize); color: var(--on-baize); }
@media (prefers-color-scheme: dark) {
  .button.quiet { color: var(--ink); border-color: var(--moss); }
}

/* The tally stick */

.tally { margin: clamp(2.5rem, 6vw, 4.5rem) 0 0; }

.stick { display: block; width: 100%; height: auto; overflow: visible; }
.stick .wood { fill: url(#wood); stroke: var(--heartwood); stroke-width: 1.5; }
.stick .grain { fill: none; stroke: var(--heartwood); stroke-width: 1.2; opacity: 0.35; }
.stick .notches { fill: var(--heartwood); }
.stick .label { font: italic 400 15px var(--text); fill: var(--moss); }

.half, .new { transform-box: fill-box; }
.stock { transform-origin: center bottom; }
.foil { transform-origin: center top; }
.new { transform-origin: center top; }

/* One moment on load: the halves part, a notch is cut through both, they close. */
@media (prefers-reduced-motion: no-preference) {
  .stock { animation: part-up 3.4s 0.5s cubic-bezier(.45, 0, .25, 1) both; }
  .foil { animation: part-down 3.4s 0.5s cubic-bezier(.45, 0, .25, 1) both; }
  .new { animation: cut 3.4s 0.5s ease-out both; }
  .entry { animation: arrive 3.4s 0.5s ease-out both; }
}
@keyframes part-up { 0%, 8% { transform: translateY(0); } 28%, 70% { transform: translateY(-16px); } 92%, 100% { transform: translateY(0); } }
@keyframes part-down { 0%, 8% { transform: translateY(0); } 28%, 70% { transform: translateY(16px); } 92%, 100% { transform: translateY(0); } }
@keyframes cut { 0%, 34% { transform: scaleY(0); } 50%, 100% { transform: scaleY(1); } }
@keyframes arrive { 0%, 50% { opacity: 0; transform: translateY(-0.4rem); } 64%, 100% { opacity: 1; transform: none; } }

.entry {
  margin: 1.25rem 0 0;
  font: 500 0.95rem/1.4 var(--mono);
  color: var(--heartwood);
}
@media (prefers-color-scheme: dark) { .entry { color: var(--hazel-light); } }
.entry span { font-weight: 500; }

figcaption {
  max-width: var(--measure);
  margin-top: 1.75rem;
  font: italic 400 1.15rem/1.6 var(--display);
  color: var(--moss);
}

/* Sections */

.block { padding: clamp(3.5rem, 9vw, 6.5rem) 0 0; }
.block > p { max-width: var(--measure); }

h2 {
  margin: 0 0 1.5rem;
  font: 700 clamp(2rem, 4.2vw, 2.9rem)/1.08 var(--display);
  color: var(--baize);
}
@media (prefers-color-scheme: dark) { h1, h2, .wordmark { color: var(--ink); } }

h3 { margin: 0 0 0.4rem; font: 700 1.2rem/1.3 var(--text); }

/* A real sequence, so it is numbered. */
.steps { list-style: none; margin: 0; padding: 0; counter-reset: step; max-width: 50rem; }
.steps li {
  counter-increment: step;
  position: relative;
  padding: 0 0 2.25rem 4.25rem;
}
.steps li::before {
  content: counter(step);
  position: absolute; left: 0; top: -0.45rem;
  font: 700 2.6rem/1 var(--display);
  color: var(--hazel);
}
.steps li::after {
  content: "";
  position: absolute; left: 1rem; top: 2.6rem; bottom: 0.6rem;
  border-left: 2px dotted var(--rule);
}
.steps li:last-child::after { display: none; }
.steps p { margin: 0; max-width: var(--measure); }

.file {
  margin: 1.25rem 0 0;
  padding: 1.25rem 1.4rem;
  background: var(--baize);
  color: var(--on-baize);
  border-radius: 6px;
  overflow-x: auto;
  font: 400 0.9rem/1.65 var(--mono);
}
.file code { font: inherit; white-space: pre-wrap; overflow-wrap: break-word; }
.file .path { display: block; margin-bottom: 0.6rem; color: var(--on-baize-muted); }

.lists { display: grid; grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr)); gap: 1rem 4rem; max-width: 56rem; }
.lists ul { margin: 0; padding: 0; list-style: none; }
.lists li { padding: 0.55rem 0 0.55rem 1.6rem; position: relative; border-top: 1px solid var(--rule); }
.lists li::before {
  content: ""; position: absolute; left: 0.2rem; top: 1.05rem;
  width: 0.7rem; height: 0.5rem;
  background: var(--heartwood);
  clip-path: polygon(0 0, 100% 0, 50% 100%);
}
.lists div:last-child li::before { background: var(--moss); clip-path: inset(40% 0 40% 0); }

.facts {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(17rem, 1fr));
  gap: 2rem 3.5rem; margin: 0; max-width: 64rem;
}
.facts.two { max-width: 52rem; margin-top: 1.5rem; }
.facts dt { font: 700 1.3rem/1.25 var(--display); color: var(--baize); margin-bottom: 0.35rem; }
@media (prefers-color-scheme: dark) { .facts dt { color: var(--hazel-light); } }
.facts dd { margin: 0; color: var(--ink); }

/* Install */

#install h3 { margin-top: 2.25rem; }
.cmd {
  position: relative;
  max-width: 46rem;
  margin-top: 0.6rem;
  background: var(--baize);
  color: var(--on-baize);
  border-radius: 6px;
}
.cmd pre { margin: 0; padding: 1.1rem 6rem 1.1rem 1.3rem; overflow-x: auto; font: 400 0.95rem/1.7 var(--mono); }
.cmd code { font: inherit; }
.cmd.prompt pre { font: italic 400 1.1rem/1.6 var(--display); }
.copy {
  position: absolute; top: 0.7rem; right: 0.7rem;
  padding: 0.35rem 0.8rem;
  border: 1px solid var(--on-baize-muted);
  border-radius: 999px;
  background: transparent;
  color: var(--on-baize);
  font: 500 0.9rem/1.2 var(--text);
  cursor: pointer;
}
.copy:hover { background: var(--on-baize); color: var(--baize); }
.note { color: var(--moss); margin-top: 1rem; }

/* Footer */

.foot {
  max-width: var(--frame);
  margin: clamp(4rem, 10vw, 7rem) auto 0;
  padding: 2rem var(--gutter) 3rem;
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: 0.5rem 2rem;
  color: var(--moss);
  border-top: 1px solid var(--rule);
}
.foot p { margin: 0; display: inline-flex; align-items: center; gap: 0.5rem; }
.foot svg { width: 1.4rem; height: 1.4rem; }

@media (max-width: 40rem) {
  body { font-size: 1.0625rem; }
  .stick .label { display: none; }
  .top nav { gap: 1rem; }
  .steps li { padding-left: 3.25rem; }
  .steps li::before { font-size: 2.1rem; }
  .steps li::after { left: 0.75rem; top: 2.2rem; }
  .cmd pre { padding-right: 1.3rem; padding-top: 3rem; white-space: pre-wrap; overflow-wrap: anywhere; }
}