:root {
  --cream: #fff8eb;
  --paper: rgba(255, 250, 240, 0.84);
  --ink: #17324d;
  --ink-soft: #4b6581;
  --mint: #73d7c2;
  --mint-deep: #249f8b;
  --coral: #ff8f6b;
  --gold: #ffc94a;
  --sky: #8bd6ff;
  --berry: #ff5f87;
  --white: #ffffff;
  --shadow: 0 24px 60px rgba(23, 50, 77, 0.14);
  --radius-xl: 30px;
  --radius-lg: 22px;
  --radius-md: 16px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Nunito", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(255, 201, 74, 0.4), transparent 28%),
    radial-gradient(circle at top right, rgba(115, 215, 194, 0.45), transparent 24%),
    linear-gradient(180deg, #fff5d9 0%, #ffe8df 48%, #fff8f3 100%);
}

body::before,
body::after {
  content: "";
  position: fixed;
  inset: auto;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  filter: blur(14px);
  z-index: -1;
  opacity: 0.5;
}

body::before {
  left: -70px;
  top: 120px;
  background: rgba(139, 214, 255, 0.6);
}

body::after {
  right: -90px;
  bottom: 80px;
  background: rgba(255, 95, 135, 0.22);
}

.page-shell {
  width: min(1180px, calc(100% - 32px));
  margin: 20px auto 40px;
}

.hero,
.section,
.challenge-card,
.control-panel {
  backdrop-filter: blur(16px);
}

.hero {
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.8), rgba(255, 246, 228, 0.9));
  border: 1px solid rgba(255, 255, 255, 0.7);
  border-radius: 38px;
  box-shadow: var(--shadow);
  padding: 30px;
  overflow: hidden;
  position: relative;
}

.hero::after {
  content: "";
  position: absolute;
  right: -60px;
  top: -50px;
  width: 240px;
  height: 240px;
  background: radial-gradient(circle, rgba(255, 201, 74, 0.8), rgba(255, 201, 74, 0));
}

.topbar {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
}

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

.brand h1,
.section-heading h2,
.showcase-copy h2,
.challenge-card h3,
.hero-card h2 {
  font-family: "Baloo 2", cursive;
  line-height: 1;
  margin: 0;
}

.brand h1 {
  font-size: clamp(2.4rem, 4vw, 4.6rem);
  max-width: 10ch;
}

.brand-mark {
  width: 72px;
  height: 72px;
  display: grid;
  place-items: center;
  border-radius: 24px;
  background: linear-gradient(135deg, var(--ink), #32638d);
  color: var(--white);
  font-family: "Baloo 2", cursive;
  font-size: 1.8rem;
  box-shadow: 0 12px 30px rgba(23, 50, 77, 0.24);
}

.eyebrow,
.card-label,
.challenge-head span,
.scoreboard span {
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.74rem;
  font-weight: 800;
}

.eyebrow,
.card-label,
.challenge-head span {
  color: var(--ink-soft);
}

.top-link {
  color: var(--ink);
  text-decoration: none;
  padding: 12px 18px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.75);
  font-weight: 800;
}

.hero-grid {
  margin-top: 34px;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 24px;
}

.hero-copy,
.hero-card,
.feature-card,
.showcase-panels article,
.challenge-card,
.control-panel {
  animation: rise-in 0.75s ease both;
}

.lead {
  max-width: 56ch;
  font-size: 1.1rem;
  line-height: 1.7;
  color: var(--ink-soft);
}

.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin: 28px 0;
}

.button {
  border: 0;
  text-decoration: none;
  border-radius: 999px;
  padding: 14px 22px;
  font-weight: 800;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.button:hover,
.button:focus-visible,
.answer-option:hover,
.answer-option:focus-visible,
.top-link:hover,
.top-link:focus-visible {
  transform: translateY(-2px);
}

.button-primary {
  color: var(--white);
  background: linear-gradient(135deg, var(--berry), var(--coral));
  box-shadow: 0 16px 30px rgba(255, 95, 135, 0.26);
}

.button-secondary {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.86);
  box-shadow: 0 12px 24px rgba(23, 50, 77, 0.08);
}

.hero-stats {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.hero-stats li,
.hero-card,
.feature-card,
.showcase-panels article,
.challenge-card,
.control-panel,
.feedback {
  background: var(--paper);
  border: 1px solid rgba(255, 255, 255, 0.65);
  border-radius: var(--radius-lg);
  box-shadow: 0 10px 24px rgba(23, 50, 77, 0.08);
}

.hero-stats li {
  padding: 18px;
}

.hero-stats strong {
  display: block;
  font-family: "Baloo 2", cursive;
  font-size: 2rem;
}

.hero-stats span {
  color: var(--ink-soft);
}

.hero-card {
  padding: 24px;
  align-self: start;
}

.hero-card p {
  color: var(--ink-soft);
}

.mission-steps {
  display: grid;
  gap: 14px;
  margin-top: 20px;
}

.mission-steps div {
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 12px;
  align-items: center;
}

.mission-steps span {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: 14px;
  font-weight: 800;
  color: var(--white);
  background: linear-gradient(135deg, var(--mint-deep), var(--sky));
}

.section {
  margin-top: 28px;
  padding: 28px;
  background: rgba(255, 255, 255, 0.58);
  border: 1px solid rgba(255, 255, 255, 0.72);
  border-radius: 34px;
  box-shadow: var(--shadow);
}

.section-heading {
  max-width: 58ch;
}

.section-heading.narrow {
  max-width: 40ch;
}

.section-heading h2,
.showcase-copy h2 {
  font-size: clamp(2rem, 3vw, 3.2rem);
  margin-top: 6px;
}

.path-grid,
.showcase-panels,
.practice-layout {
  display: grid;
  gap: 18px;
}

.path-grid {
  margin-top: 24px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.feature-card {
  padding: 24px;
}

.feature-card h3,
.showcase-panels h3,
.control-panel label,
.challenge-card h3 {
  font-size: 1.2rem;
  margin-top: 0;
}

.feature-card ul {
  padding-left: 18px;
  margin-bottom: 0;
  color: var(--ink-soft);
}

.feature-card.mint {
  background: linear-gradient(180deg, rgba(115, 215, 194, 0.32), rgba(255, 255, 255, 0.9));
}

.feature-card.coral {
  background: linear-gradient(180deg, rgba(255, 143, 107, 0.28), rgba(255, 255, 255, 0.9));
}

.feature-card.gold {
  background: linear-gradient(180deg, rgba(255, 201, 74, 0.28), rgba(255, 255, 255, 0.9));
}

.strategy-band {
  overflow: hidden;
}

.strategy-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin-top: 24px;
}

.strategy-chip {
  padding: 18px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.9), rgba(255, 246, 228, 0.9));
  border: 1px solid rgba(23, 50, 77, 0.08);
}

.strategy-chip strong {
  display: block;
  margin-bottom: 8px;
}

.strategy-chip p {
  margin: 0;
  color: var(--ink-soft);
  line-height: 1.5;
}

.showcase {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 20px;
  align-items: start;
}

.showcase-copy p {
  color: var(--ink-soft);
  line-height: 1.7;
}

.showcase-panels {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.showcase-panels article {
  padding: 22px;
}

.showcase-panels p {
  margin-bottom: 0;
  color: var(--ink-soft);
  line-height: 1.6;
}

.practice-layout {
  margin-top: 24px;
  grid-template-columns: 320px 1fr;
}

.control-panel,
.challenge-card {
  padding: 22px;
}

.control-panel {
  display: grid;
  gap: 16px;
  align-self: start;
}

.control-panel label {
  display: grid;
  gap: 8px;
  font-weight: 800;
}

select,
button,
input {
  font: inherit;
}

select {
  width: 100%;
  padding: 12px 14px;
  border-radius: 14px;
  border: 1px solid rgba(23, 50, 77, 0.14);
  background: rgba(255, 255, 255, 0.92);
  color: var(--ink);
}

.scoreboard {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.scoreboard div {
  padding: 14px 12px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.82);
  text-align: center;
}

.scoreboard strong {
  display: block;
  margin-top: 6px;
  font-family: "Baloo 2", cursive;
  font-size: 1.8rem;
}

.challenge-head {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
}

.challenge-card h3 {
  margin: 20px 0;
  font-size: clamp(1.4rem, 2vw, 2rem);
  line-height: 1.25;
}

.answer-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.answer-option {
  padding: 18px;
  text-align: left;
  border-radius: 18px;
  border: 1px solid rgba(23, 50, 77, 0.08);
  background: rgba(255, 255, 255, 0.88);
  color: var(--ink);
  cursor: pointer;
  transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.answer-option.correct {
  background: rgba(115, 215, 194, 0.32);
  border-color: rgba(36, 159, 139, 0.5);
}

.answer-option.wrong {
  background: rgba(255, 143, 107, 0.22);
  border-color: rgba(255, 143, 107, 0.45);
}

.feedback {
  min-height: 86px;
  padding: 16px 18px;
  margin: 18px 0;
  line-height: 1.6;
  color: var(--ink-soft);
}

.feedback.good {
  border-color: rgba(36, 159, 139, 0.3);
}

.feedback.try {
  border-color: rgba(255, 143, 107, 0.3);
}

@keyframes rise-in {
  from {
    opacity: 0;
    transform: translateY(18px);
  }

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

@media (max-width: 980px) {
  .hero-grid,
  .showcase,
  .practice-layout,
  .path-grid,
  .showcase-panels,
  .strategy-grid {
    grid-template-columns: 1fr;
  }

  .brand h1 {
    max-width: 100%;
  }
}

@media (max-width: 720px) {
  .page-shell {
    width: min(100% - 18px, 1180px);
  }

  .hero,
  .section {
    padding: 20px;
    border-radius: 26px;
  }

  .topbar,
  .challenge-head {
    flex-direction: column;
    align-items: flex-start;
  }

  .hero-stats,
  .scoreboard,
  .answer-grid {
    grid-template-columns: 1fr;
  }

  .brand {
    align-items: flex-start;
  }

  .brand-mark {
    width: 58px;
    height: 58px;
  }
}