:root {
  --black: #050505;
  --white: #ffffff;
  --orange: #ff5a1f;
  --purple: #7427ff;
  --green: #43e65a;
  --blue: #1768ff;
  --yellow: #ffd51f;
  --red: #ff304f;
  --line: 3px solid var(--black);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--white);
  color: var(--black);
  font-family: Arial, Helvetica, sans-serif;
  line-height: 1.45;
}

button,
input {
  font: inherit;
}

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

button:focus-visible,
a:focus-visible,
summary:focus-visible {
  outline: 4px solid var(--yellow);
  outline-offset: 4px;
}

.skip-link {
  position: absolute;
  top: -80px;
  left: 16px;
  z-index: 100;
  padding: 10px 14px;
  background: var(--yellow);
  color: var(--black);
  border: var(--line);
  font-weight: 900;
}

.skip-link:focus {
  top: 16px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  min-height: 72px;
  padding: 10px 24px;
  background: var(--black);
  color: var(--white);
  border-bottom: 3px solid var(--white);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--white);
  text-decoration: none;
  font-weight: 900;
}

.brand-mark {
  display: inline-grid;
  place-items: center;
  width: 42px;
  height: 42px;
  background: var(--orange);
  color: var(--black);
  border: 2px solid var(--white);
  font-size: 0.9rem;
}

.header-link {
  border: 0;
  background: transparent;
  color: var(--white);
  font-weight: 900;
  text-decoration: underline;
  cursor: pointer;
}

.intro {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(360px, 0.8fr);
  min-height: 610px;
  background: var(--orange);
  border-bottom: var(--line);
}

.intro-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(48px, 8vw, 110px);
  border-right: var(--line);
}

.label {
  margin: 0 0 12px;
  font-size: 0.76rem;
  font-weight: 900;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.label--dark {
  color: var(--black);
}

.intro h1 {
  max-width: 840px;
  margin: 0;
  font-size: clamp(3.5rem, 8vw, 8rem);
  line-height: 0.88;
  letter-spacing: -0.075em;
  text-transform: uppercase;
}

.intro-lede {
  max-width: 700px;
  margin: 28px 0;
  font-size: clamp(1.15rem, 2vw, 1.55rem);
  font-weight: 700;
}

.intro-actions,
.results-actions,
.study-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.primary-button,
.secondary-button {
  min-height: 50px;
  padding: 12px 18px;
  border: var(--line);
  font-weight: 900;
  cursor: pointer;
}

.primary-button {
  background: var(--black);
  color: var(--white);
}

.primary-button--dark {
  background: var(--black);
  color: var(--white);
  border-color: var(--black);
}

.secondary-button {
  background: var(--white);
  color: var(--black);
}

.secondary-button--dark {
  border-color: var(--white);
}

.primary-button:hover,
.secondary-button:hover {
  transform: translate(-2px, -2px);
  box-shadow: 5px 5px 0 currentColor;
}

.intro-poster {
  display: grid;
  align-content: center;
  gap: 20px;
  padding: 46px;
  background: var(--white);
  overflow: hidden;
}

.poster-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.poster-row--middle {
  justify-content: center;
}

.poster-row--bottom {
  align-items: end;
}

.poster-tag,
.poster-question {
  display: grid;
  place-items: center;
  border: var(--line);
  font-weight: 900;
  line-height: 1;
}

.poster-tag {
  min-width: 160px;
  min-height: 110px;
  padding: 20px;
  font-size: clamp(2rem, 5vw, 5rem);
}

.poster-tag--seo {
  background: var(--blue);
  color: var(--white);
  transform: rotate(-5deg);
}

.poster-tag--aeo {
  background: var(--purple);
  color: var(--white);
  transform: rotate(4deg);
}

.poster-tag--both {
  min-width: 240px;
  background: var(--green);
  color: var(--black);
  transform: rotate(-2deg);
}

.poster-tag--neither {
  background: var(--red);
  color: var(--white);
  transform: rotate(5deg);
}

.poster-question {
  width: 150px;
  height: 150px;
  border-radius: 50%;
  background: var(--yellow);
  font-size: 6rem;
  transform: rotate(8deg);
}

.poster-arrow {
  font-size: 7rem;
  font-weight: 900;
}

.game-shell {
  display: grid;
  grid-template-columns: 140px minmax(0, 1fr) minmax(360px, 0.75fr);
  min-height: 760px;
  background: var(--white);
  border-bottom: var(--line);
}

.score-rail {
  display: flex;
  flex-direction: column;
  background: var(--black);
  color: var(--white);
  border-right: var(--line);
}

.rail-block {
  padding: 22px 18px;
  border-bottom: 2px solid var(--white);
}

.rail-block span,
.rail-block strong {
  display: block;
}

.rail-block span {
  font-size: 0.72rem;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.rail-block strong {
  margin-top: 4px;
  font-size: 1.8rem;
}

.rail-progress {
  flex: 1;
  min-height: 180px;
  display: flex;
  align-items: end;
  padding: 10px;
  border-bottom: 2px solid var(--white);
}

.rail-progress > div {
  width: 100%;
  height: 6.25%;
  background: var(--orange);
  transition: height 180ms ease;
}

.rail-button {
  min-height: 64px;
  border: 0;
  background: var(--white);
  color: var(--black);
  font-weight: 900;
  cursor: pointer;
}

.card-stage {
  padding: 46px;
  border-right: var(--line);
}

.stage-heading,
.category-heading,
.study-heading {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 20px;
}

.stage-heading h2,
.category-heading h2,
.study-heading h2,
.results-banner h2,
.takeaway-title h2 {
  margin: 0;
  font-size: clamp(2.2rem, 5vw, 4.8rem);
  line-height: 0.94;
  letter-spacing: -0.055em;
  text-transform: uppercase;
}

.stage-heading > p {
  max-width: 210px;
  margin: 0;
  text-align: right;
  font-weight: 700;
}

.card-stack {
  position: relative;
  min-height: 390px;
  margin-top: 38px;
}

.stack-card,
.tactic-card {
  position: absolute;
  inset: 0;
  border: var(--line);
}

.stack-card--back {
  background: var(--purple);
  transform: translate(22px, 22px) rotate(2deg);
}

.stack-card--middle {
  background: var(--green);
  transform: translate(11px, 11px) rotate(-1deg);
}

.tactic-card {
  z-index: 3;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 390px;
  padding: 28px;
  background: var(--yellow);
  cursor: grab;
  user-select: none;
  transition: transform 150ms ease, opacity 150ms ease;
}

.tactic-card.is-dragging {
  opacity: 0.6;
  transform: rotate(-2deg) scale(0.98);
}

.tactic-number {
  align-self: flex-start;
  padding: 6px 10px;
  background: var(--black);
  color: var(--white);
  font-size: 0.8rem;
  font-weight: 900;
}

.tactic-card p {
  margin: 30px 0;
  font-size: clamp(2rem, 4vw, 4.3rem);
  line-height: 1;
  letter-spacing: -0.045em;
  font-weight: 900;
}

.drag-note {
  align-self: flex-end;
  font-size: 0.82rem;
  font-weight: 900;
  text-transform: uppercase;
}

.feedback-drawer {
  margin-top: 38px;
  padding: 26px;
  background: var(--green);
  border: var(--line);
}

.feedback-drawer.is-incorrect {
  background: var(--red);
  color: var(--white);
}

.feedback-top {
  display: flex;
  align-items: center;
  gap: 16px;
}

.feedback-symbol {
  display: grid;
  place-items: center;
  flex: 0 0 54px;
  width: 54px;
  height: 54px;
  background: var(--white);
  color: var(--black);
  border: var(--line);
  border-radius: 50%;
  font-size: 1.7rem;
  font-weight: 900;
}

.feedback-kicker,
.feedback-top h3 {
  margin: 0;
}

.feedback-kicker {
  font-size: 0.74rem;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.feedback-top h3 {
  font-size: 1.8rem;
}

.feedback-copy {
  font-size: 1.05rem;
}

.feedback-example {
  padding: 14px;
  background: var(--white);
  color: var(--black);
  border: var(--line);
}

.feedback-example span {
  font-size: 0.74rem;
  font-weight: 900;
  text-transform: uppercase;
}

.feedback-example p {
  margin: 4px 0 0;
}

.source-line {
  font-size: 0.8rem;
}

.source-line a {
  color: inherit;
  font-weight: 900;
}

.category-panel {
  padding: 46px 30px;
  background: var(--white);
}

.category-heading {
  margin-bottom: 26px;
}

.category-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.category-tile {
  position: relative;
  min-height: 155px;
  padding: 20px;
  border: var(--line);
  color: var(--black);
  text-align: left;
  cursor: pointer;
  transition: transform 130ms ease, box-shadow 130ms ease;
}

.category-tile:hover,
.category-tile.is-dragover {
  transform: translate(-4px, -4px);
  box-shadow: 7px 7px 0 var(--black);
}

.category-tile:disabled {
  cursor: default;
  opacity: 0.64;
  transform: none;
  box-shadow: none;
}

.category-tile.is-selected {
  outline: 6px solid var(--black);
  outline-offset: -9px;
}

.category-tile.is-answer::after {
  content: "BEST FIT";
  position: absolute;
  right: 10px;
  top: 10px;
  padding: 4px 7px;
  background: var(--black);
  color: var(--white);
  font-size: 0.66rem;
  font-weight: 900;
}

.category-tile--seo {
  background: var(--blue);
  color: var(--white);
}

.category-tile--aeo {
  background: var(--purple);
  color: var(--white);
}

.category-tile--both {
  background: var(--green);
}

.category-tile--neither {
  background: var(--red);
  color: var(--white);
}

.category-code {
  display: block;
  font-size: 0.7rem;
  font-weight: 900;
}

.category-tile strong,
.category-tile small {
  display: block;
}

.category-tile strong {
  margin: 14px 0 6px;
  font-size: 2.4rem;
  line-height: 1;
}

.category-tile small {
  max-width: 310px;
  font-size: 0.88rem;
  line-height: 1.35;
  font-weight: 700;
}

.results-section {
  padding: 80px clamp(24px, 7vw, 100px);
  background: var(--purple);
  color: var(--white);
  border-bottom: var(--line);
}

.results-banner {
  max-width: 900px;
}

.results-banner p:last-child {
  max-width: 760px;
  font-size: 1.1rem;
}

.results-layout {
  display: grid;
  grid-template-columns: 0.75fr 1.25fr;
  gap: 22px;
  margin: 36px 0 22px;
}

.result-score,
.result-metrics article,
.breakdown-card {
  border: var(--line);
}

.result-score {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 230px;
  padding: 24px;
  background: var(--yellow);
  color: var(--black);
}

.result-score span {
  font-weight: 900;
  text-transform: uppercase;
}

.result-score strong {
  font-size: clamp(4rem, 9vw, 8rem);
  line-height: 0.8;
}

.result-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
}

.result-metrics article {
  min-width: 0;
  padding: 24px;
  background: var(--white);
  color: var(--black);
  border-right: 0;
}

.result-metrics article:last-child {
  border-right: var(--line);
}

.result-metrics span,
.result-metrics strong {
  display: block;
}

.result-metrics span {
  font-size: 0.78rem;
  font-weight: 900;
  text-transform: uppercase;
}

.result-metrics strong {
  margin-top: 16px;
  font-size: clamp(2rem, 4vw, 3.6rem);
}

.breakdown-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  margin-bottom: 28px;
}

.breakdown-card {
  padding: 18px;
  background: var(--black);
  color: var(--white);
  border-right: 0;
}

.breakdown-card:last-child {
  border-right: var(--line);
}

.breakdown-card span,
.breakdown-card strong {
  display: block;
}

.breakdown-card strong {
  margin-top: 4px;
  font-size: 1.35rem;
}

.study-section {
  padding: 80px clamp(24px, 7vw, 100px);
  background: var(--white);
  border-bottom: var(--line);
}

.study-note {
  max-width: 780px;
  margin: 22px 0 32px;
  font-size: 1.05rem;
}

.filter-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.filter-button {
  padding: 8px 14px;
  border: var(--line);
  background: var(--white);
  color: var(--black);
  font-weight: 900;
  cursor: pointer;
}

.filter-button.is-active {
  background: var(--yellow);
}

.study-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: var(--line);
  border-left: var(--line);
}

.study-card {
  min-width: 0;
  padding: 22px;
  border-right: var(--line);
  border-bottom: var(--line);
  background: var(--white);
}

.study-card[data-category="SEO"] {
  box-shadow: inset 0 8px 0 var(--blue);
}

.study-card[data-category="AEO"] {
  box-shadow: inset 0 8px 0 var(--purple);
}

.study-card[data-category="Both"] {
  box-shadow: inset 0 8px 0 var(--green);
}

.study-card[data-category="Neither"] {
  box-shadow: inset 0 8px 0 var(--red);
}

.study-card-top {
  display: flex;
  justify-content: space-between;
  align-items: start;
  gap: 10px;
}

.category-pill,
.answer-pill {
  display: inline-flex;
  padding: 5px 9px;
  border: 2px solid var(--black);
  font-size: 0.7rem;
  font-weight: 900;
}

.category-pill[data-category="SEO"] { background: var(--blue); color: var(--white); }
.category-pill[data-category="AEO"] { background: var(--purple); color: var(--white); }
.category-pill[data-category="Both"] { background: var(--green); }
.category-pill[data-category="Neither"] { background: var(--red); color: var(--white); }

.answer-pill.is-correct {
  background: var(--green);
}

.answer-pill.is-wrong {
  background: var(--red);
  color: var(--white);
}

.study-card h3 {
  margin: 20px 0 12px;
  font-size: 1.35rem;
  line-height: 1.1;
}

.study-card p {
  margin: 0 0 12px;
}

.study-example {
  padding: 12px;
  background: var(--yellow);
  border: 2px solid var(--black);
}

.study-example p {
  margin: 4px 0 0;
}

.study-source {
  margin-top: 12px !important;
  font-size: 0.78rem;
}

.study-source a {
  color: var(--blue);
  font-weight: 900;
}

.study-actions {
  margin-top: 28px;
}

.takeaway-section {
  display: grid;
  grid-template-columns: 0.7fr 1.3fr;
  gap: 50px;
  padding: 90px clamp(24px, 7vw, 100px);
  background: var(--black);
  color: var(--white);
}

.takeaway-list {
  border-top: 2px solid var(--white);
}

.takeaway-list article {
  display: grid;
  grid-template-columns: 70px 1fr;
  gap: 20px;
  padding: 28px 0;
  border-bottom: 2px solid var(--white);
}

.takeaway-list article > span {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  background: var(--orange);
  color: var(--black);
  border-radius: 50%;
  font-weight: 900;
}

.takeaway-list h3 {
  margin: 0 0 8px;
  font-size: 1.55rem;
}

.takeaway-list p {
  margin: 0;
}

.sources {
  grid-column: 1 / -1;
  padding: 18px;
  background: var(--purple);
  border: 2px solid var(--white);
}

.sources summary {
  cursor: pointer;
  font-weight: 900;
}

.sources a {
  color: var(--white);
}

footer {
  padding: 28px 20px;
  background: var(--orange);
  border-top: var(--line);
  text-align: center;
  font-weight: 900;
}

footer p {
  margin: 0;
}

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

[hidden] {
  display: none !important;
}

@media (max-width: 1080px) {
  .game-shell {
    grid-template-columns: 110px minmax(0, 1fr);
  }

  .category-panel {
    grid-column: 1 / -1;
    border-top: var(--line);
  }

  .category-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .card-stage {
    border-right: 0;
  }

  .study-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 820px) {
  .intro {
    grid-template-columns: 1fr;
  }

  .intro-copy {
    border-right: 0;
    border-bottom: var(--line);
  }

  .intro-poster {
    min-height: 430px;
  }

  .game-shell {
    grid-template-columns: 1fr;
  }

  .score-rail {
    flex-direction: row;
    border-right: 0;
    border-bottom: var(--line);
  }

  .rail-block {
    flex: 1;
    border-right: 2px solid var(--white);
    border-bottom: 0;
  }

  .rail-progress {
    flex: 1;
    min-height: 0;
    align-items: center;
    border-bottom: 0;
    border-right: 2px solid var(--white);
  }

  .rail-progress > div {
    width: 6.25%;
    height: 100%;
  }

  .rail-button {
    min-height: 0;
    padding: 0 18px;
  }

  .category-panel {
    grid-column: auto;
  }

  .category-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .results-layout,
  .takeaway-section {
    grid-template-columns: 1fr;
  }

  .study-heading {
    align-items: start;
    flex-direction: column;
  }
}

@media (max-width: 620px) {
  .site-header {
    padding: 10px 14px;
  }

  .brand > span:last-child {
    display: none;
  }

  .intro-copy,
  .intro-poster,
  .card-stage,
  .category-panel {
    padding: 30px 20px;
  }

  .poster-tag {
    min-width: 120px;
    min-height: 90px;
  }

  .poster-tag--both {
    min-width: 180px;
  }

  .poster-question {
    width: 110px;
    height: 110px;
    font-size: 4rem;
  }

  .poster-arrow {
    font-size: 4rem;
  }

  .score-rail {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
  }

  .rail-progress,
  .rail-button {
    grid-column: span 3;
  }

  .rail-progress {
    min-height: 18px;
    padding: 4px;
    border-right: 0;
    border-top: 2px solid var(--white);
  }

  .rail-progress > div {
    width: 6.25%;
    height: 100%;
  }

  .rail-button {
    min-height: 48px;
  }

  .stage-heading {
    align-items: start;
    flex-direction: column;
  }

  .stage-heading > p {
    text-align: left;
  }

  .card-stack,
  .tactic-card {
    min-height: 330px;
  }

  .category-grid,
  .result-metrics,
  .breakdown-grid,
  .study-grid {
    grid-template-columns: 1fr;
  }

  .result-metrics article,
  .breakdown-card {
    border-right: var(--line);
    border-bottom: 0;
  }

  .result-metrics article:last-child,
  .breakdown-card:last-child {
    border-bottom: var(--line);
  }

  .study-grid {
    border-right: var(--line);
  }

  .study-card {
    border-right: 0;
  }

  .takeaway-list article {
    grid-template-columns: 52px 1fr;
  }
}

@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;
  }
}