/* Sound Maze. Colours are sampled from Parisha's sketch: grey paper, marker
   ink, and her red and green dots. Red and green only ever mark meaning, and
   always come with a shape or a word. */

:root {
  --paper: #e6e6e6;
  --paper-deep: #dadada;
  --ink: #0e0c0c;
  --ink-soft: #464242;
  --red: #ed0a2f; /* marks only (3.6:1 on paper); never used for text */
  --green: #1c7727;
  --stroke: 0.4rem; /* the weight of her marker line */
  --measure: 38rem;
  --gutter: clamp(1rem, 4vw, 3rem);
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2.5rem;
  --space-5: 4rem;
  --space-6: clamp(5rem, 10vw, 8rem);
  --step--1: 0.875rem;
  --step-0: 1.125rem;
  --step-1: 1.4rem;
  --step-2: 1.75rem;
  --step-3: clamp(2rem, 4vw, 2.75rem);
  --step-4: clamp(2.6rem, 6vw, 4.25rem);
  --step-5: clamp(3.4rem, 11vw, 8.5rem);
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #151414;
    --paper-deep: #201f1f;
    --ink: #e6e6e6;
    --ink-soft: #b9b4b4;
    --red: #ff5a6c;
    --green: #5cc46a;
    color-scheme: dark;
  }
}

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

[hidden] {
  display: none !important;
}

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

body {
  margin: 0;
  overflow-wrap: break-word;
  background: var(--paper);
  color: var(--ink);
  font-family: 'Atkinson Hyperlegible Next', 'Mukta', system-ui, sans-serif;
  font-size: var(--step-0);
  line-height: 1.55;
}

:lang(hi) body,
body:lang(hi) {
  line-height: 1.75;
}

img,
svg {
  display: block;
  max-width: 100%;
  height: auto;
}

h1,
h2,
h3 {
  margin: 0;
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.01em;
  text-wrap: balance;
}

:lang(hi) :is(h1, h2, h3) {
  line-height: 1.35;
  letter-spacing: 0;
}

p,
ul,
ol,
dl,
figure,
blockquote {
  margin: 0;
}

p {
  text-wrap: pretty;
}

a {
  color: inherit;
  text-decoration-thickness: 2px;
  text-underline-offset: 0.2em;
}

a:hover {
  text-decoration-thickness: 4px;
}

:focus-visible {
  outline: 3px solid var(--ink);
  outline-offset: 3px;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
}

.skip-link {
  position: absolute;
  left: var(--gutter);
  top: -4rem;
  padding: var(--space-1) var(--space-2);
  background: var(--ink);
  color: var(--paper);
  z-index: 10;
}

.skip-link:focus {
  top: var(--space-1);
}

/* ---------- Buttons ---------- */

.button {
  display: inline-flex;
  align-items: center;
  gap: 0.6em;
  min-height: 3rem;
  padding: 0.6rem 1.25rem;
  border: 2px solid var(--ink);
  border-radius: 4px;
  background: var(--ink);
  color: var(--paper);
  font: inherit;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
}

.button:hover {
  background: var(--ink-soft);
  border-color: var(--ink-soft);
}

.button--line {
  background: transparent;
  color: var(--ink);
}

.button--line:hover {
  background: var(--paper-deep);
  border-color: var(--ink);
}

.button--small {
  min-height: 2.5rem;
  padding: 0.35rem 0.9rem;
  font-size: var(--step--1);
}

/* A wall with one opening: the divider between big sections, drawn in the
   weight of her marker. --gap sets where the opening sits. */
.wall {
  --gap: 70%;
  display: flex;
  gap: 3.5rem;
  height: var(--stroke);
  margin: 0;
  border: 0;
}

.wall::before,
.wall::after {
  content: '';
  height: 100%;
  border-radius: var(--stroke);
  background: var(--ink);
}

.wall::before {
  flex: 0 0 var(--gap);
}

.wall::after {
  flex: 1;
}

/* ---------- Maze drawings ---------- */

.maze {
  color: var(--ink);
}

.maze-walls line {
  stroke: currentColor;
  stroke-linecap: round;
}

.mark-on {
  fill: var(--green);
}

.mark-off line {
  stroke: var(--red);
  stroke-linecap: round;
}

.is-drawing .maze-walls line {
  stroke-dasharray: 1;
  stroke-dashoffset: 1;
  animation: draw 0.5s ease-out forwards;
  animation-delay: calc(var(--i, 0) * 25ms);
}

.is-drawing .maze-marks > * {
  opacity: 0;
  animation: appear 0.2s ease-out forwards;
  animation-delay: calc(0.9s + var(--i, 0) * 60ms);
}

@keyframes draw {
  to {
    stroke-dashoffset: 0;
  }
}

@keyframes appear {
  to {
    opacity: 1;
  }
}

@media (prefers-reduced-motion: reduce) {
  .is-drawing .maze-walls line,
  .is-drawing .maze-marks > * {
    animation: none;
    stroke-dashoffset: 0;
    opacity: 1;
  }
}

/* ---------- Site header and footer ---------- */

.site-header {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-1) var(--space-3);
  padding: var(--space-2) var(--gutter);
}

.site-name {
  font-weight: 800;
  text-decoration: none;
}

.site-nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1) var(--space-3);
  padding: 0;
  list-style: none;
}

.site-nav a {
  text-decoration: none;
}

.site-nav a:hover,
.site-nav a[aria-current] {
  text-decoration: underline;
  text-decoration-thickness: 2px;
}

.lang-switch {
  font-weight: 700;
}

.site-footer {
  display: grid;
  gap: var(--space-3);
  padding: var(--space-5) var(--gutter) var(--space-4);
  font-size: var(--step--1);
  color: var(--ink-soft);
}

.site-footer .made-by {
  color: var(--ink);
  font-size: var(--step-0);
  font-weight: 700;
}

/* ---------- Showcase page ---------- */

.page {
  padding: 0 var(--gutter);
}

.section {
  display: grid;
  gap: var(--space-3);
  padding: var(--space-5) 0;
}

.section > * {
  min-width: 0;
}

.section > h2 {
  font-size: var(--step-3);
  max-width: 24ch;
}

.prose {
  display: grid;
  gap: var(--space-2);
  align-content: start;
  max-width: var(--measure);
}

.hero {
  display: grid;
  gap: var(--space-4);
  align-items: end;
  padding: var(--space-4) 0 var(--space-5);
}

.hero h1 {
  font-size: var(--step-5);
  line-height: 0.92;
  letter-spacing: -0.03em;
}

.hero .lede {
  margin-top: var(--space-3);
  font-size: var(--step-1);
  max-width: 28ch;
}

.hero .byline {
  margin-top: var(--space-2);
  color: var(--ink-soft);
}

.hero .actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-4);
}

.hero .play-note {
  flex-basis: 100%;
  font-size: var(--step--1);
  color: var(--ink-soft);
}

.sketch figcaption,
.figure-note {
  margin-top: var(--space-1);
  font-size: var(--step--1);
  color: var(--ink-soft);
}

@media (min-width: 60rem) {
  .hero {
    grid-template-columns: 5fr 6fr;
  }

  .hero .sketch {
    margin-right: calc(var(--gutter) * -1);
  }
}

.question-text {
  max-width: 24ch;
  font-size: clamp(2.1rem, 4.6vw, 3.5rem);
  font-weight: 800;
  line-height: 1.12;
  text-wrap: balance;
}

:lang(hi) .question-text {
  line-height: 1.4;
}

.columns {
  display: grid;
  gap: var(--space-4);
}

@media (min-width: 52rem) {
  .columns {
    grid-template-columns: 1fr 1fr;
    max-width: 72rem;
  }
}

.plain-list {
  display: grid;
  gap: var(--space-1);
  padding-left: 1.2em;
}

.plain-list li::marker {
  color: var(--ink-soft);
}

.subheading {
  font-size: var(--step-1);
}

.people {
  display: grid;
  gap: var(--space-3) var(--space-4);
  padding: 0;
  list-style: none;
}

@media (min-width: 44rem) {
  .people {
    grid-template-columns: repeat(auto-fill, minmax(17rem, 1fr));
  }
}

.person {
  display: grid;
  gap: var(--space-1);
  align-content: start;
  padding-top: var(--space-2);
  border-top: 2px solid var(--ink);
}

.person h3 {
  font-size: var(--step-1);
}

.person .age {
  font-weight: 400;
  color: var(--ink-soft);
}

.interview {
  display: grid;
  gap: var(--space-3);
  padding: var(--space-4) 0;
  border-top: 2px solid var(--ink);
}

.interview:first-of-type {
  border-top: 0;
  padding-top: 0;
}

.interview h3 {
  max-width: 30ch;
  font-size: var(--step-2);
}

.answers {
  display: grid;
  gap: var(--space-3) var(--space-4);
  padding: 0;
  list-style: none;
}

@media (min-width: 52rem) {
  .answers {
    grid-template-columns: repeat(2, minmax(0, var(--measure)));
  }
}

.answers blockquote p::before {
  content: open-quote;
}

.answers blockquote p::after {
  content: close-quote;
}

.answers .who {
  margin-top: 0.3rem;
  font-weight: 700;
  font-size: var(--step--1);
}

.equations {
  display: grid;
  grid-template-columns: auto auto 1fr;
  gap: 0.2rem 0.9rem;
  align-items: baseline;
  font-size: var(--step-2);
  font-weight: 800;
  line-height: 1.25;
}

.equations dt,
.equations dd {
  margin: 0;
}

.equations .equals {
  color: var(--ink-soft);
  font-weight: 400;
}

@media (max-width: 30rem) {
  .equations {
    gap: 0.2rem 0.6rem;
    font-size: 1rem;
  }
}

.form-statement {
  max-width: 26ch;
  font-size: var(--step-3);
  font-weight: 800;
  line-height: 1.15;
}

.decisions {
  display: grid;
  gap: 0;
  max-width: 64rem;
  padding: 0;
  list-style: none;
}

.decisions li {
  display: grid;
  gap: var(--space-1) var(--space-4);
  padding: var(--space-2) 0;
  border-top: 2px solid var(--ink);
}

.decisions .label {
  display: block;
  font-size: var(--step--1);
  color: var(--ink-soft);
}

@media (min-width: 48rem) {
  .decisions li {
    grid-template-columns: 1fr 1fr;
  }
}

.sound-list {
  display: grid;
  gap: 0;
  max-width: 48rem;
  padding: 0;
  list-style: none;
}

.sound-list li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.1rem var(--space-2);
  align-items: center;
  padding: 0.7rem 0;
  border-top: 1px solid var(--ink-soft);
}

.sound-list .button {
  grid-row: span 2;
  min-width: 5.5rem;
  justify-content: center;
}

.sound-list .name {
  font-weight: 700;
}

.sound-list .meaning {
  color: var(--ink-soft);
}

.her-key {
  max-width: 22rem;
}

.maze-pair {
  display: grid;
  gap: var(--space-4);
  align-items: start;
}

@media (min-width: 56rem) {
  .maze-pair {
    grid-template-columns: 1.15fr 1fr;
  }
}

.maze-pair .maze {
  max-width: 34rem;
}

details {
  max-width: var(--measure);
}

summary {
  cursor: pointer;
  font-weight: 700;
}

details[open] summary {
  margin-bottom: var(--space-1);
}

.sources {
  display: grid;
  gap: var(--space-2);
  max-width: 48rem;
  padding-left: 1.4em;
}

.sources .finding {
  display: block;
  color: var(--ink-soft);
}

.play-section {
  padding-bottom: var(--space-6);
}

/* ---------- Game page ---------- */

.game {
  display: grid;
  min-height: 100svh;
  grid-template-rows: auto 1fr;
}

.game main {
  padding: 0 var(--gutter) var(--space-5);
}

.game .notice {
  max-width: var(--measure);
  margin: var(--space-2) 0;
  padding: var(--space-2);
  border: 2px solid var(--ink);
  border-radius: 4px;
}

.menu {
  display: grid;
  gap: var(--space-4);
  max-width: 64rem;
}

.menu h1 {
  font-size: var(--step-4);
}

.menu .intro {
  margin-top: var(--space-2);
  font-size: var(--step-1);
  max-width: 30ch;
}

.menu h2 {
  font-size: var(--step-2);
  margin-bottom: var(--space-2);
}

.levels {
  display: grid;
  gap: var(--space-2);
  padding: 0;
  list-style: none;
}

@media (min-width: 48rem) {
  .levels {
    grid-template-columns: 1fr 1fr;
  }
}

.level-button {
  display: grid;
  gap: 0.25rem;
  width: 100%;
  height: 100%;
  padding: var(--space-2);
  border: 2px solid var(--ink);
  border-radius: 4px;
  background: transparent;
  color: var(--ink);
  font: inherit;
  text-align: start;
  cursor: pointer;
}

.level-button:hover {
  background: var(--paper-deep);
}

.level-button .n {
  font-size: var(--step--1);
  color: var(--ink-soft);
}

.level-button .name {
  font-size: var(--step-1);
  font-weight: 800;
}

.level-button .desc {
  color: var(--ink-soft);
}

.level-button .go {
  margin-top: var(--space-1);
  font-weight: 700;
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 0.2em;
}

.controls {
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: 0.4rem var(--space-3);
  max-width: 40rem;
}

.controls dt,
.controls dd {
  margin: 0;
}

kbd {
  display: inline-block;
  min-width: 1.8em;
  padding: 0 0.4em;
  border: 2px solid var(--ink);
  border-radius: 4px;
  font: inherit;
  font-weight: 700;
  font-size: 0.9em;
  text-align: center;
}

.sr-note {
  max-width: var(--measure);
  font-size: var(--step--1);
  color: var(--ink-soft);
}

.stage {
  display: grid;
  grid-template-rows: auto 1fr auto;
  min-height: calc(100svh - 6rem);
}

.paper-note {
  font-size: var(--step--1);
  color: var(--ink-soft);
}

.board {
  display: grid;
  place-items: center;
  margin: var(--space-2) 0;
  border-radius: 4px;
}

.board:focus-visible {
  outline-offset: 0;
}

.caption {
  max-width: 26ch;
  font-size: var(--step-3);
  font-weight: 700;
  line-height: 1.2;
  text-align: center;
  text-wrap: balance;
}

:lang(hi) .caption {
  line-height: 1.5;
}

.status {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1) var(--space-3);
  padding-top: var(--space-2);
  border-top: 2px solid var(--ink);
  font-size: var(--step--1);
}

.status .hint {
  margin-left: auto;
  color: var(--ink-soft);
}

.result {
  display: grid;
  gap: var(--space-3);
  max-width: 80rem;
  padding-top: var(--space-2);
}

.result h1 {
  font-size: var(--step-4);
}

.result-grid {
  display: grid;
  gap: var(--space-4);
  align-items: start;
}

.result-side {
  display: grid;
  gap: var(--space-3);
  align-content: start;
}

.reveal-pair {
  display: grid;
  gap: var(--space-3);
  align-items: start;
}

.reveal .maze {
  width: min(100%, 34rem);
}

@media (min-width: 60rem) {
  .result-grid {
    grid-template-columns: minmax(0, 1fr) 22rem;
  }

  .reveal-pair:has(#reveal-sketch:not([hidden])) {
    grid-template-columns: 1fr 1fr;
  }
}

.stats {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-4);
}

.stats div {
  display: grid;
}

.stats dt {
  font-size: var(--step--1);
  color: var(--ink-soft);
}

.stats dd {
  margin: 0;
  font-size: var(--step-2);
  font-weight: 800;
}

.score-line {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--space-2);
}

.score-line strong {
  font-size: var(--step-5);
  line-height: 1;
}

.best {
  margin-top: calc(var(--space-2) * -1);
  font-weight: 700;
}

.score-rule {
  max-width: var(--measure);
  font-size: var(--step--1);
  color: var(--ink-soft);
}

.result .actions,
.pause .actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

dialog.pause {
  width: min(32rem, calc(100vw - 2 * var(--gutter)));
  padding: var(--space-4);
  border: var(--stroke) solid var(--ink);
  border-radius: 6px;
  background: var(--paper);
  color: var(--ink);
}

dialog.pause::backdrop {
  background: rgb(14 12 12 / 0.55);
}

.pause h2 {
  font-size: var(--step-3);
  margin-bottom: var(--space-3);
}

.pause .actions {
  flex-direction: column;
  align-items: stretch;
}

.pause fieldset {
  display: grid;
  gap: var(--space-2);
  margin: var(--space-4) 0 0;
  padding: 0;
  border: 0;
}

.pause label {
  display: grid;
  gap: 0.2rem;
}

.pause .check {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.pause input[type='range'] {
  accent-color: var(--ink);
}

.pause input[type='checkbox'] {
  width: 1.3rem;
  height: 1.3rem;
  accent-color: var(--ink);
}