/* Rake's components. Each is defined once here, and pages use its classes. */

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

html {
  background: var(--colour-ground);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  color: var(--colour-text);
  font-family: var(--font-text);
  font-size: var(--size-text);
  line-height: var(--leading);
}

/* Header and footer */

.site-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2) var(--space-4);
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--colour-rule);
}

.site-name {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--colour-sand);
  font-weight: 700;
  font-size: 1.15rem;
  text-decoration: none;
}

.site-name img {
  border-radius: 4px;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1) var(--space-4);
}

.site-nav a {
  color: var(--colour-text-dim);
  text-decoration: none;
  font-size: var(--size-small);
}

.site-nav a:hover {
  color: var(--colour-sand);
}

.site-footer {
  padding: var(--space-4);
  border-top: 1px solid var(--colour-rule);
  color: var(--colour-text-dim);
  font-size: var(--size-small);
  text-align: center;
}

.site-footer p {
  margin: 0;
}

/* Layouts */

.page {
  max-width: 76rem;
  margin: 0 auto;
  padding: var(--space-5) var(--space-4) var(--space-6);
}

.content {
  min-width: 0;
  max-width: var(--measure);
}

.layout-home .content,
.layout-plain .content {
  margin: 0 auto;
}

.layout-docs .page {
  display: grid;
  grid-template-columns: 13rem minmax(0, 1fr) 12rem;
  gap: var(--space-5);
  align-items: start;
}

@media (max-width: 70rem) {
  .layout-docs .page {
    grid-template-columns: 12rem minmax(0, 1fr);
  }
  .page-contents {
    display: none;
  }
}

@media (max-width: 48rem) {
  .page {
    padding: var(--space-4) var(--space-3) var(--space-5);
  }
  /* On a phone the page comes first, and the list of pages follows it. */
  .layout-docs .page {
    grid-template-columns: minmax(0, 1fr);
  }
  .docs-nav {
    position: static;
    order: 2;
    margin-top: var(--space-5);
    padding-top: var(--space-3);
    border-top: 1px solid var(--colour-rule);
  }
}

/* Text */

h1,
h2,
h3,
h4 {
  color: var(--colour-sand-light);
  line-height: 1.25;
  letter-spacing: -0.01em;
  scroll-margin-top: var(--space-4);
}

h1 {
  margin: 0 0 var(--space-4);
  color: var(--colour-sand);
  font-size: var(--size-h1);
  font-weight: 700;
}

h2 {
  margin: var(--space-5) 0 var(--space-3);
  font-size: var(--size-h2);
  font-weight: 600;
}

h3 {
  margin: var(--space-4) 0 var(--space-2);
  font-size: var(--size-h3);
  font-weight: 600;
}

p,
ul,
ol,
dl {
  margin: 0 0 var(--space-3);
}

ul,
ol {
  padding-left: var(--space-4);
}

li + li {
  margin-top: var(--space-1);
}

a {
  color: var(--colour-link);
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--colour-sand-light);
}

strong {
  color: var(--colour-sand-light);
}

/* Diagrams */

.diagram {
  margin: 0 0 var(--space-4);
}

.diagram-panels {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-3);
}

.diagram-panel {
  min-width: 0;
  padding: var(--space-3);
  border: 1px solid var(--colour-rule);
  border-radius: var(--radius);
  background: var(--colour-ground-raised);
}

.diagram-panel h4 {
  margin: 0 0 var(--space-2);
  font-size: 1rem;
  font-weight: 600;
}

.diagram svg {
  display: block;
  width: 100%;
  height: auto;
  overflow: visible;
}

.diagram-desk {
  fill: none;
  stroke: var(--colour-sand-dim);
  stroke-width: 1.5;
  stroke-dasharray: 5 4;
}

.diagram-cell {
  fill: var(--colour-ground);
  stroke: var(--colour-sand-dim);
  stroke-width: 1.5;
}

.diagram-cell-active {
  fill: var(--colour-code-ground);
  stroke: var(--colour-code-flow);
}

.diagram-cell-idle {
  stroke: var(--colour-rule);
}

.diagram-value,
.diagram-instruction {
  fill: var(--colour-text);
  font-family: var(--font-code);
  font-size: 19px;
  text-anchor: middle;
  dominant-baseline: central;
}

.diagram-value-idle {
  fill: var(--colour-text-dim);
}

.diagram-instruction {
  font-size: 16px;
}

.diagram-label {
  fill: var(--colour-text-dim);
  font-size: 15px;
}

.diagram-operation {
  fill: var(--colour-code-ground);
  stroke: var(--colour-code-flow);
  stroke-width: 1.5;
}

.diagram-flow {
  fill: none;
  stroke: var(--colour-code-flow);
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.diagram figcaption {
  margin-top: var(--space-2);
  color: var(--colour-text-dim);
  font-size: var(--size-small);
  line-height: 1.5;
}

.diagram-scroll {
  overflow-x: auto;
}

.diagram-gpu-rack svg {
  min-width: 36rem;
}

.diagram-data-layout svg,
.diagram-vector-ops svg {
  min-width: 34rem;
}

@media (max-width: 40rem) {
  .diagram-panels {
    grid-template-columns: minmax(0, 1fr);
  }
}

/* Tables */

.table-scroll {
  margin: 0 0 var(--space-4);
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--size-small);
  line-height: 1.5;
}

th,
td {
  padding: var(--space-2) var(--space-3);
  border-bottom: 1px solid var(--colour-rule);
  text-align: left;
  vertical-align: top;
}

th {
  color: var(--colour-sand);
  font-weight: 600;
  background: var(--colour-ground-raised);
}

/* Code */

code {
  font-family: var(--font-code);
  font-size: 0.875em;
  font-variant-ligatures: none;
  padding: 0.1em 0.35em;
  border-radius: 4px;
  background: var(--colour-ground-code);
  overflow-wrap: anywhere;
}

pre.code {
  margin: 0 0 var(--space-4);
  padding: var(--space-3) var(--space-4);
  overflow-x: auto;
  border: 1px solid var(--colour-rule);
  border-radius: var(--radius);
  background: var(--colour-code-ground);
  color: var(--colour-code-text);
  font-size: var(--size-code);
  line-height: 1.6;
  tab-size: 2;
}

pre.code code {
  padding: 0;
  background: none;
  font-size: inherit;
  overflow-wrap: normal;
  font-variant-ligatures: common-ligatures contextual;
}

.tok-keyword,
.tok-constant-builtin {
  color: var(--colour-code-keyword);
  font-weight: 500;
}

.tok-type,
.tok-type-builtin {
  color: var(--colour-code-type);
}

.tok-function,
.tok-function-builtin {
  color: var(--colour-code-function);
}

.tok-tag {
  color: var(--colour-code-tine);
  font-weight: 500;
}

/* A tine or a uniform is one mark, whatever its parts are. */
.tok-tag span,
.tok-constant span {
  color: inherit;
  font-weight: inherit;
}

.tok-constant {
  color: var(--colour-code-uniform);
  font-weight: 500;
  /* <-1.0> would otherwise draw as an arrow. */
  font-variant-ligatures: none;
}

.tok-operator-flow {
  color: var(--colour-code-flow);
  font-weight: 500;
}

.tok-number,
.tok-boolean,
.tok-string,
.tok-string-special,
.tok-escape {
  color: var(--colour-code-number);
}

.tok-comment {
  color: var(--colour-code-comment);
  font-style: italic;
}

.tok-operator,
.tok-punctuation-bracket,
.tok-punctuation-delimiter,
.tok-punctuation-special,
.tok-delimiter,
.tok-property {
  color: var(--colour-code-punctuation);
}

/* Home page */

.home-intro {
  display: grid;
  grid-template-columns: 11rem minmax(0, 1fr);
  gap: var(--space-5);
  align-items: center;
  margin-bottom: var(--space-5);
}

.home-intro-image {
  width: 100%;
  height: auto;
  border-radius: var(--radius);
}

.home-intro h1 {
  margin-bottom: var(--space-3);
}

.home-intro p {
  font-size: 1.15rem;
  color: var(--colour-text);
}

@media (max-width: 40rem) {
  .site-nav {
    gap: var(--space-1) var(--space-3);
  }
  .home-intro {
    grid-template-columns: 6rem minmax(0, 1fr);
    gap: var(--space-4);
    align-items: center;
  }
  .home-intro > div {
    display: contents;
  }
  .home-intro h1 {
    margin: 0;
  }
  .home-intro p {
    grid-column: 1 / -1;
    margin-bottom: 0;
    font-size: var(--size-text);
  }
  .home-intro .link-row {
    grid-column: 1 / -1;
    margin-top: 0;
  }
}

.link-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-3);
  margin: var(--space-3) 0 0;
  padding: 0;
  list-style: none;
}

.link-row li + li {
  margin-top: 0;
}

.link-button {
  display: inline-block;
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--colour-sand-dim);
  border-radius: var(--radius);
  color: var(--colour-sand);
  font-weight: 600;
  font-size: var(--size-small);
  text-decoration: none;
}

.link-button:hover {
  border-color: var(--colour-sand);
  color: var(--colour-sand-light);
}

.project {
  display: grid;
  grid-template-columns: 14rem minmax(0, 1fr);
  gap: var(--space-4);
  align-items: start;
  margin: 0 0 var(--space-4);
}

.project img {
  width: 100%;
  height: auto;
  border-radius: var(--radius);
}

.project h3 {
  margin-top: 0;
}

@media (max-width: 40rem) {
  .project {
    grid-template-columns: minmax(0, 1fr);
  }
}

/* Documentation */

.docs-nav {
  position: sticky;
  top: var(--space-4);
  font-size: var(--size-small);
}

.docs-nav-group {
  margin: var(--space-4) 0 var(--space-1);
  color: var(--colour-text-dim);
  font-weight: 600;
}

.docs-nav-group:first-child {
  margin-top: 0;
}

.docs-nav ul,
.page-contents ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.docs-nav li + li,
.page-contents li + li {
  margin-top: 0.15rem;
}

.docs-nav a,
.page-contents a {
  color: var(--colour-text);
  text-decoration: none;
}

.docs-nav a:hover,
.page-contents a:hover {
  color: var(--colour-sand);
}

.docs-nav a[aria-current="page"] {
  color: var(--colour-sand);
  font-weight: 600;
}

.page-contents {
  position: sticky;
  top: var(--space-4);
  font-size: 0.85rem;
  line-height: 1.5;
}

.page-contents-title {
  margin: 0 0 var(--space-2);
  color: var(--colour-text-dim);
  font-weight: 600;
}

.page-contents code {
  padding: 0;
  background: none;
}

.docs-list dt {
  margin-top: var(--space-3);
  font-weight: 600;
}

.docs-list dd {
  margin: var(--space-1) 0 0;
  color: var(--colour-text-dim);
}

.align-left {
  text-align: left;
}

.align-center {
  text-align: center;
}

.align-right {
  text-align: right;
}

td code,
th code {
  white-space: nowrap;
  overflow-wrap: normal;
}

/* Diagrams and output keep their characters, so their columns line up. */
pre.code-text code {
  font-variant-ligatures: none;
}

/* Playground */

.layout-playground .page {
  max-width: 94rem;
}

.layout-playground .content {
  max-width: none;
}

.playground-app {
  overflow: hidden;
  margin-bottom: var(--space-6);
  border: 1px solid var(--colour-rule);
  border-radius: calc(var(--radius) * 1.5);
  background: var(--colour-ground-raised);
  box-shadow: 0 1.5rem 4rem rgba(0, 0, 0, 0.24);
}

.playground-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--colour-rule);
}

.playground-lesson-title {
  margin: 0;
  font-size: var(--size-h2);
}

.playground-progress,
.playground-target-note,
.playground-status,
.playground-keyboard {
  margin: 0;
  color: var(--colour-text-dim);
  font-size: var(--size-small);
}

.playground-progress {
  margin-bottom: var(--space-1);
  color: var(--colour-sand-dim);
  font-weight: 600;
}

.playground-steps,
.playground-controls,
.playground-tabs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
}

.playground-app button,
.playground-app select {
  min-height: 2.5rem;
  padding: 0.42rem 0.75rem;
  border: 1px solid var(--colour-rule);
  border-radius: 6px;
  background: var(--colour-ground);
  color: var(--colour-text);
  font: inherit;
  font-size: var(--size-small);
}

.playground-app button:hover:not(:disabled),
.playground-app select:hover {
  border-color: var(--colour-sand-dim);
}

.playground-app button:focus-visible,
.playground-app select:focus-visible,
.playground-app textarea:focus-visible,
.playground-app input:focus-visible {
  outline: 2px solid var(--colour-link);
  outline-offset: 2px;
}

.playground-app button:disabled {
  opacity: 0.42;
}

.playground-grid {
  display: grid;
  grid-template-columns: minmax(15rem, 0.75fr) minmax(32rem, 1.6fr);
  min-height: 42rem;
}

.playground-lesson {
  padding: var(--space-4);
  border-right: 1px solid var(--colour-rule);
  background: rgba(30, 20, 16, 0.38);
}

.playground-lesson p:last-child {
  margin-bottom: 0;
}

.playground-keyboard {
  padding-top: var(--space-3);
  border-top: 1px solid var(--colour-rule);
}

kbd {
  padding: 0.1rem 0.35rem;
  border: 1px solid var(--colour-rule);
  border-radius: 4px;
  background: var(--colour-ground);
  color: var(--colour-sand-light);
  font-family: var(--font-code);
  font-size: 0.8em;
}

.playground-workbench {
  min-width: 0;
  padding: var(--space-4);
}

.playground-editor-shell {
  position: relative;
  height: 21rem;
  overflow: hidden;
  border: 1px solid var(--colour-rule);
  border-radius: var(--radius);
  background: var(--colour-code-ground);
}

.has-editor-error .playground-editor-shell {
  border-color: var(--colour-rust);
}

.playground-highlighting,
.playground-editor-shell textarea {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  margin: 0;
  padding: var(--space-3) var(--space-4);
  overflow: auto;
  border: 0;
  background: transparent;
  font-family: var(--font-code);
  font-size: var(--size-code);
  font-variant-ligatures: common-ligatures contextual;
  line-height: 1.6;
  tab-size: 2;
  white-space: pre;
}

.playground-highlighting {
  pointer-events: none;
  color: var(--colour-code-text);
}

.playground-highlighting code {
  padding: 0;
  background: transparent;
  font: inherit;
  white-space: inherit;
}

.playground-editor-shell textarea {
  z-index: 1;
  resize: none;
  color: transparent;
  caret-color: var(--colour-code-text);
  -webkit-text-fill-color: transparent;
}

.playground-editor-shell textarea::selection {
  background: rgba(131, 165, 152, 0.34);
}

.playground-no-ligatures .playground-highlighting,
.playground-no-ligatures .playground-editor-shell textarea {
  font-variant-ligatures: none;
}

.editor-error-token {
  text-decoration: underline wavy var(--colour-rust) 2px;
  text-underline-offset: 0.22em;
}

.playground-controls {
  margin-top: var(--space-3);
}

.playground-controls label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--colour-text-dim);
  font-size: var(--size-small);
}

.playground-run {
  border-color: var(--colour-sand-dim) !important;
  background: var(--colour-sand) !important;
  color: var(--colour-ground) !important;
  font-weight: 700 !important;
}

.playground-check {
  margin-left: auto;
}

.playground-target-note {
  min-height: 1.6rem;
  margin-top: var(--space-2);
}

.playground-output {
  margin-top: var(--space-3);
  border: 1px solid var(--colour-rule);
  border-radius: var(--radius);
  background: var(--colour-ground);
}

.playground-tabs {
  padding: var(--space-1) var(--space-2) 0;
  border-bottom: 1px solid var(--colour-rule);
}

.playground-tabs button {
  margin-bottom: -1px;
  border: 0;
  border-bottom: 2px solid transparent;
  border-radius: 0;
  background: transparent;
  color: var(--colour-text-dim);
}

.playground-tabs button[aria-selected="true"] {
  border-bottom-color: var(--colour-rust);
  color: var(--colour-sand-light);
}

.playground-panel {
  min-height: 8.5rem;
  max-height: 19rem;
  margin: 0;
  padding: var(--space-3) var(--space-4);
  overflow: auto;
}

.playground-panel[hidden] {
  display: none;
}

.playground-code {
  color: var(--colour-code-text);
  font-family: var(--font-code);
  font-size: var(--size-code);
  line-height: 1.55;
  white-space: pre;
}

.playground-status {
  margin-top: var(--space-2);
  text-align: right;
}

.playground-message {
  margin: 0;
  white-space: pre-wrap;
}

.playground-message-error {
  color: #ff9b7c;
  font-family: var(--font-code);
  font-size: var(--size-code);
}

.playground-message-success {
  color: var(--colour-code-flow);
}

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

.lane-traces li + li {
  margin-top: var(--space-3);
}

.lane-trace-label {
  margin: 0 0 var(--space-1);
  color: var(--colour-text-dim);
  font-family: var(--font-code);
  font-size: 0.78rem;
}

.lane-row {
  display: flex;
  gap: var(--space-1);
}

.lane-cell {
  min-width: 3.2rem;
  padding: var(--space-2);
  border: 1px solid var(--colour-code-uniform);
  border-radius: 4px;
  color: var(--colour-code-text);
  font-family: var(--font-code);
  font-size: 0.8rem;
  text-align: center;
}

.lane-cell.is-true {
  background: rgba(184, 187, 38, 0.2);
}

.lane-cell.is-false,
.lane-cell.is-inactive {
  border-style: dashed;
  opacity: 0.48;
}

.playground-reference {
  max-width: var(--measure);
  margin: 0 auto;
  padding-top: var(--space-5);
  border-top: 1px solid var(--colour-rule);
}

@media (max-width: 58rem) {
  .playground-grid {
    grid-template-columns: minmax(0, 1fr);
  }
  .playground-lesson {
    border-right: 0;
    border-bottom: 1px solid var(--colour-rule);
  }
}

@media (max-width: 40rem) {
  .playground-heading {
    align-items: flex-start;
    padding: var(--space-3);
  }
  .playground-lesson-title {
    font-size: var(--size-h3);
  }
  .playground-lesson,
  .playground-workbench {
    padding: var(--space-3);
  }
  .playground-editor-shell {
    height: 19rem;
  }
  .playground-highlighting,
  .playground-editor-shell textarea {
    padding: var(--space-3);
    font-size: 0.78rem;
  }
  .playground-check {
    width: 100%;
    margin-left: 0;
  }
}