:root {
  --pink: #ff6f91;
  --yellow: #ffd84d;
  --aqua: #57d6c2;
  --blue: #5f7cff;
  --coral: #ff7a59;
  --lime: #b8e85d;
}

.hero { display: block; min-height: 0; }

.hero-intro {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(280px, .85fr);
  min-height: min(760px, calc(100svh - 65px));
  padding: clamp(70px, 9vw, 130px) 5vw;
  border-right: 0;
  border-bottom: 1px solid var(--line);
  background: #fff8dd;
}

.hero-copy { display: flex; flex-direction: column; justify-content: center; }
.hero h1 { font-size: clamp(72px, 10vw, 150px); }
.hero h1 i { color: var(--blue); }
.hero-line { margin: 38px 0 0; font: 500 clamp(25px, 3vw, 42px)/1.05 var(--serif); }

.hero-actions {
  align-self: center;
  max-width: 430px;
  justify-self: end;
  padding: clamp(24px, 4vw, 48px);
  background: var(--aqua);
}

.hero-actions > p { margin: 0 0 28px; font: 20px/1.4 var(--serif); }
.hero-actions > p strong { font-style: italic; }
.hero-actions .pill { width: 100%; margin-top: 10px; background: var(--white); }
.hero-actions .pill:hover { background: var(--ink); }
.hero-actions .free { border-radius: 0; background: var(--yellow); }
.hero-actions .free i { font-style: normal; }
.free-note { display: block; margin-top: 12px; color: #17333a; font: 14px/1.4 var(--serif); }

.transformation {
  grid-template-columns: 1fr 34px 1fr 34px 1fr;
  max-width: 1500px;
  margin: auto;
  padding: 90px 4vw;
}

.stage { grid-template-rows: auto minmax(330px, 1fr) auto; height: 590px; }
.stage-message { min-height: 88px; padding: 20px; border-top: 1px solid var(--line); font: 500 25px/1.1 var(--serif); }
.stage-card { background: var(--yellow); }
.stage-abstract { background: #e9f4ef; }
.lesson strong { color: var(--blue); }
.lesson p { font-size: 21px; }
.lesson span { font-size: 12px; }

.bridge small {
  padding: 7px 10px;
  background: var(--yellow);
  color: var(--ink);
  font-weight: 700;
}

.world { overflow: hidden; transition: transform .25s ease, box-shadow .25s ease; }
.world img { transition: transform .55s ease; }
.world:hover { transform: translateY(-7px) rotate(-.35deg); box-shadow: 10px 12px 0 rgba(23, 42, 49, .14); }
.world:hover img { transform: scale(1.055); }
.world:nth-child(2) div { background: #ffe3a3; }
.world:nth-child(3) div { background: #d6f1e7; }
.world:nth-child(4) div { background: #dce3ff; }
.world:nth-child(5) div { background: #ffd9e2; }
.world:nth-child(6) div { background: #f4efa4; }
.world:nth-child(7) div { background: #d5efe9; }
.world:nth-child(8) div { background: #ffdfbc; }
.world:nth-child(9) div { background: #ded9ff; }
.world.open:hover { transform: translateY(-7px) rotate(-.35deg); }

.topic { color: var(--ink); text-decoration: none; transition: transform .2s, background .2s; }
.topic.live { background: var(--yellow); }
.topic.live:hover { z-index: 2; transform: translateY(-5px); background: var(--aqua); }

@media (max-width: 900px) {
  .hero-intro { grid-template-columns: 1.12fr .88fr; min-height: 700px; padding: 80px 3vw 55px; }
  .hero h1 { font-size: clamp(62px, 10vw, 90px); }
  .hero-actions { padding: 25px; }
  .hero-actions > p { font-size: 17px; }
  .transformation { grid-template-columns: 1fr 25px 1fr 25px 1fr; padding: 70px 3vw; }
  .stage { height: 510px; grid-template-rows: auto minmax(270px, 1fr) auto; }
  .stage-message { min-height: 78px; padding: 14px; font-size: 20px; }
  .lesson { padding: 18px; }
  .lesson strong { margin: 22px 0 15px; font-size: 33px; }
  .lesson p { font-size: 16px; }
}

@media (max-width: 650px) {
  .hero-intro { grid-template-columns: 1fr; min-height: 0; padding: 85px 22px 55px; }
  .hero h1 { font-size: 66px; }
  .hero-line { margin-bottom: 50px; }
  .hero-actions { width: 100%; max-width: none; justify-self: stretch; }
  .transformation { grid-template-columns: 1fr; padding: 60px 16px 80px; }
  .stage { height: auto; grid-template-rows: auto 340px auto; }
  .stage-arrow { transform: rotate(90deg); }
}

@media (prefers-reduced-motion: reduce) {
  .world, .world img, .topic { transition: none; }
}