:root {
  --color-ink: #080808;
  --color-surface: #111111;
  --color-surface-raised: #171717;
  --color-line: #343434;
  --color-copy: #f7f4ed;
  --color-muted: #aaa59a;
  --color-warm: #f2e2ab;
  --color-red: #e4443c;
  --color-red-deep: #b92822;
  --color-blue: #5c6cff;
  --color-green: #43b15b;
  --color-error: #ff6a62;
  --font-display: "Archivo Black", sans-serif;
  --font-body: "DM Sans", sans-serif;
  --page-width: 1120px;
  --page-gutter: clamp(18px, 4vw, 48px);
  --space-1: 6px;
  --space-2: 10px;
  --space-3: 16px;
  --space-4: 24px;
  --space-5: 36px;
  --space-6: 56px;
  --radius-small: 3px;
  --clue-letter-spacing: 0.02em;
  --clue-word-spacing: 0.28em;
}

* {
  box-sizing: border-box;
}

html {
  color-scheme: dark;
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  margin: 0;
  overflow-x: hidden;
  background:
    linear-gradient(rgba(255, 255, 255, 0.015) 1px, transparent 1px),
    var(--color-ink);
  background-size: 100% 32px;
  color: var(--color-copy);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.5;
}

a {
  color: inherit;
}

button,
input {
  font: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

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

.page-glow {
  position: fixed;
  z-index: -1;
  width: 45vw;
  height: 45vw;
  border-radius: 50%;
  opacity: 0.13;
  filter: blur(120px);
  pointer-events: none;
}

.page-glow--red {
  top: -28vw;
  left: -16vw;
  background: var(--color-red);
}

.page-glow--blue {
  top: 18vh;
  right: -35vw;
  background: var(--color-blue);
}

.site-header {
  padding: var(--space-5) var(--page-gutter) var(--space-4);
  border-top: 4px solid var(--color-red-deep);
}

.site-header__rail,
.game-shell,
.site-footer {
  width: min(100%, var(--page-width));
  margin-inline: auto;
}

.site-header__rail {
  display: grid;
  grid-template-columns: minmax(320px, 590px) minmax(280px, 1fr);
  align-items: center;
  gap: clamp(24px, 6vw, 72px);
}

.site-logo {
  display: block;
  width: min(100%, 590px);
  height: auto;
  mix-blend-mode: screen;
}

.directions {
  max-width: 570px;
  margin: 0;
  color: var(--color-warm);
  font-size: clamp(0.93rem, 1.4vw, 1.05rem);
  line-height: 1.6;
}

.directions span {
  display: block;
  margin-bottom: var(--space-1);
  color: var(--color-blue);
  font-family: var(--font-display);
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.game-shell {
  padding-inline: var(--page-gutter);
}

.part-nav {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin-top: var(--space-2);
  border-bottom: 1px solid var(--color-line);
}

.part-nav a {
  position: relative;
  padding: 15px var(--space-3) 13px;
  color: var(--color-muted);
  font-family: var(--font-display);
  font-size: clamp(0.8rem, 2vw, 1rem);
  letter-spacing: 0.03em;
  text-align: center;
  text-decoration: none;
  text-transform: uppercase;
  transition:
    color 160ms ease,
    background-color 160ms ease;
}

.part-nav a + a {
  border-left: 1px solid var(--color-line);
}

.part-nav a::after {
  position: absolute;
  right: 0;
  bottom: -1px;
  left: 0;
  height: 3px;
  background: transparent;
  content: "";
}

.part-nav a:hover {
  background: rgba(255, 255, 255, 0.035);
  color: var(--color-copy);
}

.part-nav a.is-current {
  color: var(--color-copy);
}

.part-nav a.is-current::after {
  background: var(--color-red);
}

.part-note {
  margin: var(--space-3) 0 0;
  color: var(--color-warm);
  text-align: center;
}

.scorebar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: grid;
  grid-template-columns: auto minmax(140px, 1fr) auto;
  align-items: center;
  gap: var(--space-4);
  margin: var(--space-4) 0 0;
  padding: 12px 0;
  border-top: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
  background: rgba(8, 8, 8, 0.91);
  backdrop-filter: blur(14px);
}

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

.scorebar__eyebrow {
  color: var(--color-muted);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.scorebar strong {
  color: var(--color-red);
  font-family: var(--font-display);
  font-size: 1.25rem;
  white-space: nowrap;
}

progress {
  width: 100%;
  height: 6px;
  overflow: hidden;
  border: 0;
  border-radius: 0;
  appearance: none;
}

progress::-webkit-progress-bar {
  background: var(--color-line);
}

progress::-webkit-progress-value {
  background: linear-gradient(90deg, var(--color-red), var(--color-blue));
}

progress::-moz-progress-bar {
  background: linear-gradient(90deg, var(--color-red), var(--color-blue));
}

.text-button {
  padding: var(--space-1) 0;
  border: 0;
  border-bottom: 1px solid var(--color-muted);
  background: transparent;
  color: var(--color-muted);
  cursor: pointer;
  font-size: 0.82rem;
  font-weight: 700;
  transition:
    border-color 160ms ease,
    color 160ms ease;
}

.text-button:hover {
  border-color: var(--color-copy);
  color: var(--color-copy);
}

.test {
  padding: var(--space-5) 0 0;
}

.test__intro {
  display: grid;
  grid-template-columns: minmax(150px, 0.35fr) minmax(220px, 0.65fr);
  column-gap: clamp(28px, 7vw, 84px);
  padding-bottom: var(--space-5);
  animation: intro-in 460ms ease both;
}

.test__kicker {
  grid-column: 1;
  align-self: end;
  margin: 0 0 var(--space-1);
  color: var(--color-blue);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.test__intro h1 {
  grid-column: 1;
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 5vw, 4.7rem);
  line-height: 0.95;
  letter-spacing: -0.045em;
  text-transform: uppercase;
}

.test__intro > p:last-child {
  grid-column: 2;
  grid-row: 1 / span 2;
  align-self: end;
  max-width: 590px;
  margin: 0;
  color: var(--color-muted);
  font-size: clamp(1rem, 1.8vw, 1.16rem);
}

.questions {
  border-top: 1px solid var(--color-line);
}

.question {
  display: grid;
  grid-template-columns: minmax(280px, 0.78fr) minmax(360px, 1.22fr);
  align-items: center;
  min-height: 70px;
  border-bottom: 1px solid var(--color-line);
  animation: question-in 350ms ease both;
  transition: background-color 180ms ease;
}

.question:nth-child(2) {
  animation-delay: 20ms;
}

.question:nth-child(3) {
  animation-delay: 40ms;
}

.question:nth-child(4) {
  animation-delay: 60ms;
}

.question:nth-child(5) {
  animation-delay: 80ms;
}

.question:nth-child(6) {
  animation-delay: 100ms;
}

.question:nth-child(7) {
  animation-delay: 120ms;
}

.question:nth-child(8) {
  animation-delay: 140ms;
}

.question > label {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr);
  align-items: baseline;
  gap: var(--space-2);
  padding: 14px var(--space-4) 14px 0;
  cursor: text;
}

.question__number {
  color: var(--color-red);
  font-family: var(--font-display);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
}

.question__prompt {
  color: var(--color-copy);
  font-size: clamp(0.98rem, 1.4vw, 1.08rem);
  font-weight: 700;
  letter-spacing: var(--clue-letter-spacing);
  word-spacing: var(--clue-word-spacing);
}

.answer {
  position: relative;
  display: flex;
  align-items: center;
}

.answer input {
  width: 100%;
  min-height: 43px;
  padding: 9px 104px 9px 12px;
  border: 1px solid #5b5b5b;
  border-radius: var(--radius-small);
  background: #f3f0e9;
  color: #151515;
  caret-color: var(--color-red-deep);
  transition:
    border-color 150ms ease,
    box-shadow 150ms ease,
    background-color 150ms ease;
}

.answer input:hover:not(:disabled) {
  border-color: #8d8d8d;
}

.answer input:focus {
  border-color: var(--color-blue);
  box-shadow: 0 0 0 3px rgba(92, 108, 255, 0.28);
  outline: 0;
}

.answer input:disabled {
  opacity: 1;
  cursor: default;
}

.answer__state {
  position: absolute;
  right: 12px;
  color: #6d6a64;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  pointer-events: none;
  text-transform: uppercase;
}

.question--correct {
  background: rgba(67, 177, 91, 0.055);
}

.question--correct .answer input {
  border-color: var(--color-green);
  background: #eaf6e9;
  box-shadow: inset 4px 0 0 var(--color-green);
}

.question--correct .answer__state {
  color: #257b37;
}

.question--wrong .answer input {
  border-color: var(--color-error);
  box-shadow: inset 4px 0 0 var(--color-error);
}

.question--wrong .answer__state {
  color: #9e2924;
}

.question--example {
  border-top: 1px solid var(--color-line);
  animation-delay: 50ms;
}

.question--example .question__number {
  color: var(--color-blue);
}

.question--example > label {
  grid-template-columns: 88px minmax(0, 1fr);
}

.question--example .answer input {
  background: #cac6be;
  color: #55514b;
}

.answer__state--example {
  color: #55514b;
}

.promo {
  display: grid;
  grid-template-columns: minmax(130px, 0.78fr) minmax(240px, 1.22fr);
  min-height: 54px;
  border-bottom: 1px solid var(--color-line);
  background:
    linear-gradient(90deg, rgba(228, 68, 60, 0.15), transparent 45%),
    var(--color-surface);
}

.promo span,
.promo a {
  display: flex;
  align-items: center;
}

.promo span {
  padding: 12px var(--space-4) 12px 48px;
  color: var(--color-red);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.promo a {
  padding: 12px 0;
  color: var(--color-warm);
  font-size: 0.9rem;
  font-weight: 700;
  text-underline-offset: 3px;
}

.promo a:hover {
  color: var(--color-copy);
}

.completion {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-4);
  margin-top: var(--space-5);
  padding: var(--space-4);
  border-top: 3px solid var(--color-green);
  border-bottom: 1px solid var(--color-line);
  background: linear-gradient(90deg, rgba(67, 177, 91, 0.13), transparent);
}

.completion[hidden] {
  display: none;
}

.completion__mark {
  color: var(--color-green);
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 4vw, 2.6rem);
}

.completion__eyebrow {
  margin: 0;
  color: var(--color-green);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.completion h2 {
  margin: 2px 0;
  font-family: var(--font-display);
  font-size: clamp(1.25rem, 3vw, 2rem);
}

.completion p:last-child {
  margin: 0;
  color: var(--color-muted);
}

.save-note {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin: var(--space-4) 0;
  color: var(--color-muted);
  font-size: 0.85rem;
}

.save-note__light {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-green);
  box-shadow: 0 0 18px rgba(67, 177, 91, 0.8);
}

.part-next {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--space-2) var(--space-3);
  padding: var(--space-4) 0 var(--space-5);
  border-top: 1px solid var(--color-line);
}

.part-next p {
  flex-basis: 100%;
  margin: 0;
  color: var(--color-muted);
}

.part-next a {
  color: var(--color-copy);
  font-family: var(--font-display);
  text-decoration-color: var(--color-red);
  text-decoration-thickness: 2px;
  text-underline-offset: 4px;
}

.part-next a:hover {
  color: var(--color-red);
}

.part-next span {
  color: var(--color-muted);
  font-size: 0.9rem;
}

.site-footer {
  padding: var(--space-5) var(--page-gutter) var(--space-6);
  border-top: 1px solid var(--color-line);
  color: var(--color-muted);
}

.site-footer > p {
  max-width: 880px;
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.75;
}

.site-footer__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-4);
  color: var(--color-copy);
  font-size: 0.8rem;
}

.site-footer__meta a {
  text-underline-offset: 3px;
}

.site-footer__meta a:hover {
  color: var(--color-red);
}

.error-page {
  display: grid;
  min-height: 100vh;
  place-items: center;
  padding: var(--page-gutter);
}

.error-page__content {
  width: min(100%, 760px);
}

.error-page__content .site-logo {
  margin-bottom: var(--space-6);
}

.error-page h1 {
  margin: var(--space-1) 0 var(--space-3);
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 8vw, 5rem);
  line-height: 0.98;
}

.button-link {
  display: inline-block;
  margin-top: var(--space-3);
  padding: 12px 16px;
  border: 1px solid var(--color-red);
  background: var(--color-red);
  color: #fff;
  font-weight: 700;
  text-decoration: none;
}

.button-link:hover {
  background: transparent;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@keyframes intro-in {
  from {
    opacity: 0;
    transform: translateY(10px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes question-in {
  from {
    opacity: 0;
    transform: translateY(5px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 820px) {
  .site-header {
    padding-top: var(--space-4);
  }

  .site-header__rail {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }

  .directions {
    max-width: 650px;
  }

  .scorebar {
    grid-template-columns: auto 1fr;
  }

  .text-button {
    grid-column: 1 / -1;
    justify-self: start;
  }

  .test__intro {
    grid-template-columns: 1fr;
    gap: var(--space-3);
  }

  .test__kicker,
  .test__intro h1,
  .test__intro > p:last-child {
    grid-column: 1;
    grid-row: auto;
  }

  .test__intro > p:last-child {
    max-width: 650px;
  }

  .question {
    grid-template-columns: 1fr;
    gap: 0;
    padding: 15px 0 17px;
  }

  .question > label {
    padding: 0 0 var(--space-2);
  }

  .promo {
    grid-template-columns: minmax(116px, 0.4fr) minmax(0, 1fr);
  }

  .promo span {
    padding-left: 14px;
  }
}

@media (max-width: 520px) {
  :root {
    --clue-word-spacing: 0.22em;
  }

  .site-header {
    padding-bottom: var(--space-3);
  }

  .part-nav a {
    padding-inline: var(--space-1);
    font-size: 0.72rem;
  }

  .scorebar {
    gap: var(--space-3);
    margin-top: var(--space-3);
  }

  .scorebar__eyebrow {
    display: none;
  }

  .test {
    padding-top: var(--space-4);
  }

  .test__intro {
    padding-bottom: var(--space-4);
  }

  .question > label {
    grid-template-columns: 28px minmax(0, 1fr);
    gap: 8px;
  }

  .question--example > label {
    grid-template-columns: 82px minmax(0, 1fr);
  }

  .question__prompt {
    font-size: 0.98rem;
  }

  .answer input {
    min-height: 46px;
    padding-right: 12px;
    font-size: 16px;
  }

  .answer {
    display: grid;
    grid-template-columns: 1fr;
  }

  .answer__state {
    position: static;
    justify-self: end;
    margin-top: 4px;
    font-size: 0.64rem;
  }

  .question--correct .answer input {
    font-size: 14px;
  }

  .promo {
    grid-template-columns: 1fr;
    gap: 0;
    padding: 12px 14px;
  }

  .promo span,
  .promo a {
    padding: 0;
  }

  .promo a {
    margin-top: 2px;
  }

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

  .site-footer__meta span[aria-hidden] {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}