:root {
  --navy: #183153;
  --blue: #1877d2;
  --sky: #36c5f0;
  --teal: #00a9a5;
  --yellow: #ffd23f;
  --coral: #ff6b5f;
  --purple: #7652c7;
  --green: #44b96b;
  --pink: #f65aa3;
  --cream: #fff9e8;
  --ink: #20283a;
  --white: #fff;
  --shadow: 0 18px 45px rgba(24, 49, 83, 0.15);
  --border: 3px solid var(--navy);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--cream);
  font-family: "Trebuchet MS", "Arial Rounded MT Bold", Arial, sans-serif;
  line-height: 1.55;
}

button,
input {
  font: inherit;
}

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

.skip-link {
  position: fixed;
  z-index: 1000;
  top: 8px;
  left: 8px;
  padding: 10px 16px;
  color: var(--white);
  background: var(--navy);
  border-radius: 8px;
  transform: translateY(-150%);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  min-height: 80px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 14px max(24px, calc((100vw - 1160px) / 2));
  color: var(--white);
  background: var(--navy);
  border-bottom: 6px solid var(--yellow);
}

.brand,
.footer-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand {
  color: inherit;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  width: 44px;
  height: 44px;
  place-items: center;
  color: var(--navy);
  background: var(--yellow);
  border: 3px solid currentColor;
  border-radius: 50%;
  font-size: 24px;
  line-height: 1;
  transform: rotate(-8deg);
}

.brand strong,
.footer-brand strong {
  display: block;
  font-size: 20px;
  letter-spacing: 0.06em;
  line-height: 1;
}

.brand small,
.footer-brand small {
  display: block;
  margin-top: 5px;
  font-size: 10px;
  font-weight: 900;
  letter-spacing: 0.18em;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

.site-nav a {
  padding: 7px 14px;
  color: var(--white);
  border: 2px solid rgba(255, 255, 255, 0.45);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 900;
  text-decoration: none;
  transition: color 150ms ease, background 150ms ease, transform 150ms ease;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--navy);
  background: var(--yellow);
  border-color: var(--yellow);
  transform: translateY(-2px);
}

.hero {
  position: relative;
  min-height: 690px;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  align-items: center;
  gap: 64px;
  overflow: hidden;
  padding: 72px max(24px, calc((100vw - 1160px) / 2)) 90px;
  background:
    radial-gradient(circle at 12% 18%, rgba(255, 210, 63, 0.2) 0 7px, transparent 8px),
    radial-gradient(circle at 18% 30%, rgba(255, 107, 95, 0.18) 0 5px, transparent 6px),
    linear-gradient(135deg, #eaf8ff, #fff9e8 58%, #f1ebff);
}

.hero::after {
  content: "";
  position: absolute;
  right: -70px;
  bottom: -95px;
  width: 280px;
  height: 280px;
  background: var(--sky);
  border-radius: 48% 52% 47% 53%;
  opacity: 0.14;
}

.hero-copy {
  position: relative;
  z-index: 2;
  max-width: 600px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--purple);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0.16em;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1,
h2,
h3 {
  font-family: "Arial Rounded MT Bold", "Trebuchet MS", Arial, sans-serif;
  color: var(--navy);
  line-height: 1.08;
}

h1 {
  margin-bottom: 24px;
  font-size: clamp(54px, 6.4vw, 86px);
  letter-spacing: -0.055em;
}

h1 span {
  color: var(--blue);
  text-shadow: 3px 3px 0 var(--yellow);
}

h2 {
  margin-bottom: 16px;
  font-size: clamp(34px, 4.4vw, 54px);
  letter-spacing: -0.035em;
}

h3 {
  font-size: 23px;
}

.hero-intro {
  max-width: 570px;
  margin-bottom: 28px;
  font-size: 20px;
  font-weight: 700;
}

.button {
  display: inline-flex;
  min-height: 52px;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 24px;
  color: var(--navy);
  background: var(--white);
  border: 3px solid var(--navy);
  border-radius: 14px;
  box-shadow: 4px 5px 0 var(--navy);
  font-weight: 900;
  text-decoration: none;
  cursor: pointer;
  transition: transform 150ms ease, box-shadow 150ms ease, background 150ms ease;
}

.button:hover {
  transform: translate(2px, 2px);
  box-shadow: 2px 3px 0 var(--navy);
}

.button:focus-visible,
.answer-button:focus-visible,
input:focus-visible,
footer button:focus-visible {
  outline: 4px solid var(--yellow);
  outline-offset: 3px;
}

.button-primary {
  color: var(--navy);
  background: var(--yellow);
}

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

.button-wide {
  width: 100%;
}

.button:disabled {
  opacity: 0.48;
  cursor: not-allowed;
  transform: none;
  box-shadow: 3px 4px 0 var(--navy);
}

.privacy-note {
  margin: 18px 0 0;
  color: #52647c;
  font-size: 13px;
  font-weight: 700;
}

.hero-visual {
  position: relative;
  min-height: 500px;
  display: grid;
  place-items: center;
}

.sunburst {
  position: absolute;
  width: min(43vw, 470px);
  aspect-ratio: 1;
  background: repeating-conic-gradient(var(--yellow) 0 10deg, transparent 10deg 20deg);
  border-radius: 50%;
  opacity: 0.68;
  animation: gentle-spin 40s linear infinite;
}

.book-cover {
  position: relative;
  z-index: 2;
  width: min(80%, 350px);
  max-height: 510px;
  object-fit: contain;
  border: 3px solid var(--navy);
  border-radius: 7px 12px 12px 7px;
  box-shadow: 14px 16px 0 rgba(24, 49, 83, 0.18), 0 28px 55px rgba(24, 49, 83, 0.25);
  transform: rotate(3deg);
}

.spark {
  position: absolute;
  z-index: 3;
  display: grid;
  place-items: center;
  color: var(--navy);
  background: var(--white);
  border: var(--border);
  border-radius: 50%;
  font-weight: 900;
  box-shadow: 4px 5px 0 var(--navy);
}

.spark-one {
  top: 2%;
  right: 8%;
  width: 67px;
  height: 67px;
  color: var(--coral);
  font-size: 30px;
  transform: rotate(10deg);
}

.spark-two {
  bottom: 8%;
  left: 4%;
  width: 58px;
  height: 58px;
  color: var(--purple);
  font-size: 26px;
}

.spark-three {
  top: 27%;
  left: 0;
  width: 54px;
  height: 54px;
  color: var(--blue);
  font-size: 29px;
  transform: rotate(-8deg);
}

@keyframes gentle-spin {
  to { transform: rotate(360deg); }
}

.how-it-works,
.library {
  padding: 84px max(24px, calc((100vw - 1160px) / 2));
  text-align: center;
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 42px;
}

.step-card,
.book-card {
  position: relative;
  padding: 32px 26px 28px;
  background: var(--white);
  border: var(--border);
  border-radius: 24px;
  box-shadow: 7px 8px 0 var(--navy);
}

.step-card:nth-child(1) {
  background: #e9f7ff;
}

.step-card:nth-child(2) {
  background: #fff3bd;
}

.step-card:nth-child(3) {
  background: #e8f8ed;
}

.step-number {
  position: absolute;
  top: -18px;
  left: -12px;
  display: grid;
  width: 44px;
  height: 44px;
  place-items: center;
  color: var(--white);
  background: var(--purple);
  border: 3px solid var(--navy);
  border-radius: 50%;
  font-size: 20px;
  font-weight: 900;
}

.step-icon {
  display: block;
  margin-bottom: 15px;
  font-size: 52px;
}

.step-card h3 {
  margin-bottom: 9px;
}

.step-card p,
.book-card p {
  margin-bottom: 0;
}

.spark-lab {
  display: grid;
  grid-template-columns: 1fr 0.92fr;
  align-items: stretch;
  gap: 42px;
  padding: 86px max(24px, calc((100vw - 1160px) / 2));
  color: var(--white);
  background:
    radial-gradient(circle at 12% 22%, rgba(255, 210, 63, 0.18) 0 7px, transparent 8px),
    radial-gradient(circle at 85% 75%, rgba(54, 197, 240, 0.22) 0 9px, transparent 10px),
    var(--purple);
}

.spark-lab h2,
.spark-lab .eyebrow {
  color: var(--white);
}

.spark-lab-copy > p:not(.eyebrow) {
  max-width: 590px;
  font-size: 18px;
  font-weight: 700;
}

.spark-meter {
  max-width: 580px;
  margin: 28px 0 24px;
}

.spark-meter-label {
  display: flex;
  justify-content: space-between;
  margin-bottom: 7px;
  font-size: 14px;
  font-weight: 900;
}

.spark-meter-label strong {
  color: var(--yellow);
}

.spark-meter-track {
  height: 20px;
  padding: 3px;
  overflow: hidden;
  background: var(--white);
  border: 3px solid var(--navy);
  border-radius: 999px;
}

.spark-meter-track span {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--yellow), var(--coral), var(--sky));
  border-radius: 999px;
  transition: width 350ms ease;
}

.spark-hunt {
  position: relative;
  min-height: 190px;
  overflow: hidden;
  background:
    linear-gradient(rgba(24, 49, 83, 0.2), rgba(24, 49, 83, 0.2)),
    repeating-linear-gradient(135deg, transparent 0 24px, rgba(255,255,255,0.04) 24px 48px);
  border: 3px dashed rgba(255,255,255,0.75);
  border-radius: 24px;
}

.spark-token {
  position: absolute;
  display: grid;
  width: 52px;
  height: 52px;
  place-items: center;
  color: var(--navy);
  background: var(--yellow);
  border: 3px solid var(--navy);
  border-radius: 50%;
  box-shadow: 4px 5px 0 var(--navy);
  font-size: 24px;
  font-weight: 900;
  cursor: pointer;
  animation: spark-float 2.3s ease-in-out infinite alternate;
  transition: opacity 200ms ease, transform 200ms ease;
}

.spark-token:hover,
.spark-token:focus-visible {
  transform: scale(1.13) rotate(8deg);
}

.spark-token.is-collected {
  opacity: 0.25;
  transform: scale(0.72);
  animation: none;
  cursor: default;
}

.spark-token-one { top: 25px; left: 8%; }
.spark-token-two { right: 9%; bottom: 25px; color: var(--white); background: var(--blue); animation-delay: -0.7s; }
.spark-token-three { top: 34px; left: 47%; color: var(--white); background: var(--coral); animation-delay: -1.2s; }
.spark-token-four { bottom: 20px; left: 25%; color: var(--white); background: var(--pink); animation-delay: -1.7s; }
.spark-token-five { top: 20px; right: 24%; color: var(--white); background: var(--green); animation-delay: -0.3s; }

@keyframes spark-float {
  to { translate: 0 -10px; rotate: 6deg; }
}

.mission-machine {
  position: relative;
  align-self: center;
  padding: 24px;
  background: var(--navy);
  border: 5px solid var(--yellow);
  border-radius: 30px;
  box-shadow: 11px 13px 0 rgba(0, 0, 0, 0.24);
}

.machine-lights {
  display: flex;
  gap: 9px;
  margin: 0 0 15px 5px;
}

.machine-lights span {
  width: 15px;
  height: 15px;
  background: var(--coral);
  border: 2px solid var(--white);
  border-radius: 50%;
  font-size: 0;
}

.machine-lights span:nth-child(2) { background: var(--yellow); }
.machine-lights span:nth-child(3) { background: var(--green); }

.mission-screen {
  min-height: 235px;
  display: grid;
  align-content: center;
  padding: 28px;
  color: var(--navy);
  background:
    radial-gradient(circle at 12px 12px, rgba(24,49,83,0.09) 0 2px, transparent 2.5px),
    #e9f7ff;
  background-size: 24px 24px;
  border: 4px solid var(--sky);
  border-radius: 20px;
  text-align: center;
}

.mission-icon {
  display: block;
  margin-bottom: 5px;
  font-size: 54px;
}

.mission-label {
  margin-bottom: 8px;
  color: var(--purple);
  font-size: 11px;
  font-weight: 900;
  letter-spacing: 0.13em;
}

#mission-text {
  margin-bottom: 0;
  font-family: "Arial Rounded MT Bold", "Trebuchet MS", Arial, sans-serif;
  font-size: 23px;
  font-weight: 900;
  line-height: 1.25;
}

.mission-machine .button {
  margin-top: 18px;
}

.mission-machine.is-spinning .mission-screen {
  animation: screen-pop 380ms ease;
}

@keyframes screen-pop {
  50% { transform: scale(0.97) rotate(-1deg); filter: brightness(1.08); }
}

.machine-message {
  min-height: 22px;
  margin: 16px 0 0;
  color: #d8e7f5;
  font-size: 13px;
  font-weight: 800;
  text-align: center;
}

.quiz-zone {
  padding: 90px 24px;
  background:
    radial-gradient(circle at 10% 15%, rgba(255,255,255,0.16) 0 5px, transparent 6px),
    radial-gradient(circle at 90% 80%, rgba(255,210,63,0.22) 0 7px, transparent 8px),
    var(--navy);
}

.quiz-shell {
  max-width: 830px;
  margin: 0 auto;
  padding: 38px;
  background: var(--white);
  border: 5px solid var(--yellow);
  border-radius: 30px;
  box-shadow: 12px 14px 0 rgba(0, 0, 0, 0.25);
}

.quiz-heading-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
  padding-bottom: 28px;
  border-bottom: 3px dashed #c9d2dc;
}

.quiz-heading-row h2 {
  margin: 0;
}

.quiz-badge {
  display: grid;
  width: 88px;
  height: 88px;
  flex: 0 0 auto;
  place-content: center;
  color: var(--navy);
  background: var(--yellow);
  border: var(--border);
  border-radius: 50%;
  font-size: 34px;
  font-weight: 900;
  line-height: 0.65;
  text-align: center;
  transform: rotate(5deg);
}

.quiz-badge small {
  font-size: 9px;
  letter-spacing: 0.05em;
}

.quiz-panel {
  padding: 38px 24px 8px;
}

.welcome-character,
.result-icon {
  margin-bottom: 12px;
  font-size: 60px;
  text-align: center;
}

.quiz-panel > h3,
.quiz-panel > p {
  text-align: center;
}

.quiz-panel > h3 {
  margin-bottom: 12px;
  font-size: clamp(28px, 4vw, 40px);
}

.quiz-panel label {
  display: block;
  margin: 28px 0 8px;
  color: var(--navy);
  font-weight: 900;
}

.quiz-panel input {
  width: 100%;
  min-height: 56px;
  margin-bottom: 18px;
  padding: 12px 16px;
  color: var(--ink);
  background: #f5fbff;
  border: 3px solid var(--navy);
  border-radius: 12px;
}

.progress-row {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  color: var(--navy);
  font-size: 14px;
  font-weight: 900;
}

.progress-track {
  height: 14px;
  margin: 9px 0 30px;
  overflow: hidden;
  background: #dce7ef;
  border: 2px solid var(--navy);
  border-radius: 999px;
}

.progress-track span {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--yellow), var(--coral));
  transition: width 300ms ease;
}

.question-world {
  display: table;
  margin: 0 auto 15px;
  padding: 5px 12px;
  color: var(--white);
  background: var(--purple);
  border-radius: 999px;
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

#question-text {
  min-height: 82px;
}

.answer-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin: 28px 0 20px;
}

.answer-button {
  min-height: 82px;
  padding: 14px 16px;
  color: var(--navy);
  background: #f7fbff;
  border: 3px solid var(--navy);
  border-radius: 14px;
  font-weight: 800;
  text-align: left;
  cursor: pointer;
  transition: transform 140ms ease, background 140ms ease;
}

.answer-button:hover:not(:disabled) {
  background: #e9f7ff;
  transform: translateY(-2px);
}

.answer-button.correct {
  background: #c9f2d4;
  border-color: #19773a;
}

.answer-button.incorrect {
  background: #ffe0dc;
  border-color: #b52e25;
}

.answer-button:disabled {
  color: var(--navy);
  cursor: default;
}

.answer-feedback {
  min-height: 63px;
  margin-bottom: 16px;
  padding: 13px 16px;
  background: #f1f5f8;
  border-left: 6px solid var(--sky);
  border-radius: 8px;
  font-weight: 800;
}

.answer-feedback:empty {
  display: none;
}

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

.result-score {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  margin: 12px auto 26px;
  padding: 12px 20px;
  background: #fff3bd;
  border: var(--border);
  border-radius: 16px;
}

.result-score strong {
  color: var(--purple);
  font-size: 32px;
}

.result-score span {
  max-width: 130px;
  font-size: 13px;
  font-weight: 900;
  line-height: 1.2;
  text-align: left;
}

.result-actions {
  display: flex;
  justify-content: center;
  gap: 18px;
}

.tree-zone {
  display: grid;
  grid-template-columns: 0.82fr 1.18fr;
  align-items: center;
  gap: 70px;
  padding: 92px max(24px, calc((100vw - 1160px) / 2));
  background: #e9f7ff;
}

.tree-copy > p:not(.eyebrow) {
  max-width: 500px;
  font-size: 18px;
}

.tree-progress {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 30px 0 28px;
}

.tree-progress span {
  padding: 10px 13px;
  background: var(--white);
  border: 2px solid var(--navy);
  border-radius: 12px;
  font-size: 13px;
  font-weight: 800;
}

.tree-progress strong {
  color: var(--purple);
  font-size: 20px;
}

.tree-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.tree-tip {
  margin-top: 18px;
  color: #52647c;
  font-size: 13px !important;
  font-weight: 800;
}

.tree-stage {
  position: relative;
  min-height: 480px;
  overflow: hidden;
  background: linear-gradient(#aee7ff 0 68%, #91da7c 68%);
  border: 5px solid var(--navy);
  border-radius: 34px;
  box-shadow: 10px 12px 0 var(--navy);
}

.cloud {
  position: absolute;
  width: 90px;
  height: 28px;
  background: rgba(255,255,255,0.86);
  border-radius: 999px;
}

.cloud::before,
.cloud::after {
  content: "";
  position: absolute;
  bottom: 0;
  background: inherit;
  border-radius: 50%;
}

.cloud::before {
  left: 16px;
  width: 40px;
  height: 42px;
}

.cloud::after {
  right: 12px;
  width: 34px;
  height: 35px;
}

.cloud-one {
  top: 55px;
  left: 45px;
}

.cloud-two {
  top: 100px;
  right: 45px;
  transform: scale(0.8);
}

.tree {
  position: absolute;
  left: 50%;
  bottom: 88px;
  width: 330px;
  height: 340px;
  transform: translateX(-50%);
}

.tree-trunk {
  position: absolute;
  z-index: 2;
  bottom: 0;
  left: 50%;
  width: 72px;
  height: 190px;
  background: #9a5b31;
  border: 5px solid var(--navy);
  border-radius: 48% 52% 12px 12px;
  transform: translateX(-50%);
}

.tree-branch {
  position: absolute;
  z-index: 1;
  bottom: 124px;
  width: 138px;
  height: 32px;
  background: #9a5b31;
  border: 5px solid var(--navy);
  border-radius: 999px;
  opacity: 0.25;
  transition: opacity 800ms ease, transform 800ms ease;
}

.branch-left {
  left: 44px;
  transform: rotate(-28deg) scaleX(0.65);
  transform-origin: right center;
}

.branch-right {
  right: 44px;
  transform: rotate(28deg) scaleX(0.65);
  transform-origin: left center;
}

.tree-crown {
  position: absolute;
  z-index: 3;
  background: #a5d8a6;
  border: 5px solid var(--navy);
  border-radius: 48% 52% 50% 50%;
  opacity: 0.28;
  transition: opacity 800ms ease, transform 800ms ease, background 800ms ease;
}

.crown-left {
  top: 95px;
  left: 22px;
  width: 135px;
  height: 125px;
  transform: scale(0.75) rotate(-7deg);
}

.crown-middle {
  top: 25px;
  left: 93px;
  width: 150px;
  height: 156px;
  transform: scale(0.75);
}

.crown-right {
  top: 96px;
  right: 20px;
  width: 136px;
  height: 126px;
  transform: scale(0.75) rotate(8deg);
}

.tree-stage.is-grown .tree-branch,
.tree-stage.is-grown .tree-crown {
  opacity: 1;
}

.tree-stage.is-grown .branch-left {
  transform: rotate(-28deg) scaleX(1);
}

.tree-stage.is-grown .branch-right {
  transform: rotate(28deg) scaleX(1);
}

.tree-stage.is-grown .tree-crown {
  background: var(--green);
  transform: scale(1);
}

.tree-stage.is-grown .crown-left {
  transform: scale(1) rotate(-7deg);
}

.tree-stage.is-grown .crown-right {
  transform: scale(1) rotate(8deg);
}

.leaf {
  position: absolute;
  z-index: 4;
  display: grid;
  width: 48px;
  height: 48px;
  place-items: center;
  color: var(--navy);
  background: var(--yellow);
  border: 3px solid var(--navy);
  border-radius: 50% 10% 50% 50%;
  font-size: 21px;
  font-weight: 900;
  padding: 0;
  opacity: 0;
  transform: scale(0) rotate(-12deg);
}

.tree-stage.is-grown .leaf {
  animation: leaf-pop 500ms forwards;
}

.tree-stage.is-grown .leaf:nth-child(2) { animation-delay: 120ms; }
.tree-stage.is-grown .leaf:nth-child(3) { animation-delay: 240ms; }
.tree-stage.is-grown .leaf:nth-child(4) { animation-delay: 360ms; }
.tree-stage.is-grown .leaf:nth-child(5) { animation-delay: 480ms; }
.tree-stage.is-grown .leaf:nth-child(6) { animation-delay: 600ms; }

@keyframes leaf-pop {
  to { opacity: 1; transform: scale(1) rotate(-12deg); }
}

.tree-stage.is-grown .leaf {
  cursor: pointer;
}

.tree-stage.is-grown .leaf:hover,
.tree-stage.is-grown .leaf:focus-visible {
  z-index: 7;
  animation: none;
  opacity: 1;
  transform: scale(1.15) rotate(4deg);
  outline: 4px solid var(--white);
  outline-offset: 2px;
}

.water-drops {
  position: absolute;
  z-index: 6;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.water-drop {
  position: absolute;
  top: -30px;
  width: 15px;
  height: 24px;
  background: var(--sky);
  border: 2px solid var(--navy);
  border-radius: 55% 45% 65% 35%;
  transform: rotate(45deg);
  animation: water-fall 1.05s ease-in forwards;
}

@keyframes water-fall {
  to { top: 72%; transform: rotate(45deg) translateX(var(--water-drift)); opacity: 0; }
}

.tree-stage.is-watered .tree-crown {
  filter: saturate(1.25) brightness(1.08);
}

.tree-fact {
  position: absolute;
  z-index: 20;
  top: 24px;
  right: 24px;
  left: 24px;
  padding: 18px 48px 18px 20px;
  color: var(--navy);
  background: rgba(255, 249, 232, 0.97);
  border: 4px solid var(--navy);
  border-radius: 18px;
  box-shadow: 7px 8px 0 rgba(24, 49, 83, 0.28);
}

.tree-fact strong,
.tree-fact span {
  display: block;
}

.tree-fact strong {
  margin-bottom: 4px;
  color: var(--purple);
  font-family: "Arial Rounded MT Bold", "Trebuchet MS", Arial, sans-serif;
  font-size: 18px;
}

.tree-fact span {
  font-size: 14px;
  font-weight: 800;
}

.tree-fact button {
  position: absolute;
  top: 8px;
  right: 10px;
  width: 32px;
  height: 32px;
  color: var(--white);
  background: var(--coral);
  border: 2px solid var(--navy);
  border-radius: 50%;
  font-size: 20px;
  font-weight: 900;
  cursor: pointer;
}

.ground {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 80px;
  background: #62bd59;
  border-top: 4px solid var(--navy);
}

.flower {
  position: absolute;
  color: var(--pink);
  font-size: 28px;
  text-shadow: 1px 2px var(--navy);
}

.flower-one { left: 12%; top: 12px; }
.flower-two { right: 14%; top: 28px; color: var(--yellow); }
.flower-three { right: 35%; top: 8px; color: var(--coral); }

.locked-message {
  position: absolute;
  z-index: 8;
  bottom: 24px;
  left: 50%;
  min-width: 280px;
  padding: 10px 18px;
  color: var(--navy);
  background: rgba(255,255,255,0.94);
  border: 3px solid var(--navy);
  border-radius: 14px;
  text-align: center;
  transform: translateX(-50%);
}

.locked-message strong,
.locked-message span {
  display: block;
}

.locked-message span {
  font-size: 12px;
}

.tree-stage.is-grown .locked-message {
  color: var(--navy);
  background: var(--yellow);
}

.section-intro {
  max-width: 650px;
  margin: 0 auto;
}

.book-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 42px;
}

.book-card {
  min-height: 260px;
  padding: 46px 20px 24px;
  text-align: left;
}

.book-card h3 {
  margin-bottom: 10px;
}

.book-emoji {
  display: block;
  margin-bottom: 15px;
  font-size: 44px;
}

.book-status {
  position: absolute;
  top: 12px;
  right: 12px;
  padding: 4px 8px;
  color: var(--white);
  background: var(--purple);
  border-radius: 999px;
  font-size: 10px;
  font-weight: 900;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.current-book {
  background: #fff3bd;
}

.current-book.is-complete {
  background: #d9f5df;
}

.current-book.is-complete .book-status {
  background: #19773a;
}

.locked-book {
  background: #f1f4f6;
  filter: saturate(0.6);
}

footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
  padding: 34px max(24px, calc((100vw - 1160px) / 2));
  color: var(--white);
  background: var(--navy);
}

.footer-brand .brand-mark {
  width: 38px;
  height: 38px;
  font-size: 19px;
}

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

.footer-meta p {
  margin-bottom: 5px;
  font-size: 13px;
}

.footer-meta button {
  padding: 0;
  color: #c8d7e6;
  background: transparent;
  border: 0;
  font-size: 11px;
  text-decoration: underline;
  cursor: pointer;
}

.footer-meta a {
  display: block;
  margin-bottom: 5px;
  color: var(--yellow);
  font-size: 12px;
  font-weight: 900;
}

.confetti-layer {
  position: fixed;
  z-index: 999;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.confetti-piece {
  position: absolute;
  top: -30px;
  width: 13px;
  height: 22px;
  border: 2px solid var(--navy);
  animation: confetti-fall 2.5s ease-in forwards;
}

@keyframes confetti-fall {
  to {
    transform: translate3d(var(--drift), 105vh, 0) rotate(760deg);
    opacity: 0.9;
  }
}

.screen-reader-status {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

[hidden] {
  display: none !important;
}

@media (max-width: 900px) {
  .hero {
    grid-template-columns: 1fr;
    gap: 34px;
    padding-top: 56px;
    text-align: center;
  }

  .hero-copy {
    margin: 0 auto;
  }

  .hero-intro {
    margin-right: auto;
    margin-left: auto;
  }

  .hero-visual {
    min-height: 440px;
  }

  .steps,
  .book-grid {
    grid-template-columns: 1fr 1fr;
  }

  .spark-lab {
    grid-template-columns: 1fr;
  }

  .tree-zone {
    grid-template-columns: 1fr;
  }

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

  .tree-copy > p:not(.eyebrow) {
    margin-right: auto;
    margin-left: auto;
  }

  .tree-progress {
    justify-content: center;
  }
}

@media (max-width: 620px) {
  .site-header {
    min-height: 68px;
  }

  .site-nav {
    display: none;
  }

  .brand strong {
    font-size: 17px;
  }

  .hero {
    min-height: auto;
    padding-bottom: 65px;
  }

  h1 {
    font-size: 50px;
  }

  .hero-intro {
    font-size: 17px;
  }

  .hero-visual {
    min-height: 390px;
  }

  .book-cover {
    width: min(75%, 270px);
  }

  .sunburst {
    width: 360px;
  }

  .steps,
  .book-grid {
    grid-template-columns: 1fr;
  }

  .quiz-zone {
    padding: 58px 14px;
  }

  .quiz-shell {
    padding: 24px 15px;
    border-width: 4px;
    border-radius: 22px;
  }

  .quiz-heading-row {
    align-items: flex-start;
  }

  .quiz-badge {
    width: 68px;
    height: 68px;
    font-size: 26px;
  }

  .quiz-panel {
    padding: 30px 5px 4px;
  }

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

  #question-text {
    min-height: auto;
  }

  .result-actions {
    flex-direction: column;
  }

  .tree-zone {
    padding-top: 68px;
    padding-bottom: 76px;
  }

  .tree-progress {
    flex-direction: column;
  }

  .tree-actions {
    flex-direction: column;
  }

  .tree-actions .button {
    width: 100%;
  }

  .tree-stage {
    min-height: 430px;
    border-radius: 24px;
  }

  .tree {
    bottom: 78px;
    transform: translateX(-50%) scale(0.86);
  }

  .locked-message {
    min-width: 255px;
  }

  footer {
    flex-direction: column;
    text-align: center;
  }

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

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

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

@media print {
  body {
    background: var(--white);
  }

  .site-header,
  .hero,
  .how-it-works,
  .spark-lab,
  .quiz-zone,
  .library,
  footer,
  .tree-copy .button {
    display: none !important;
  }

  .tree-zone {
    min-height: 100vh;
    grid-template-columns: 1fr;
    padding: 36px;
    background: var(--white);
  }

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

  .tree-stage {
    width: 680px;
    max-width: 100%;
    margin: 0 auto;
    box-shadow: none;
    print-color-adjust: exact;
    -webkit-print-color-adjust: exact;
  }
}