:root { --violet: #5b3df5; --sky: #eef0ff; --coral: #ff7a59; --text: #1e1f2b; --muted: #61647a; }
* { box-sizing: border-box; }
body { margin: 0; background: #fff; color: var(--text); font: 17px/1.7 "Plus Jakarta Sans", system-ui, sans-serif; }
h1, h2, h3 { line-height: 1.15; font-weight: 800; }
img { display: block; width: 100%; height: auto; object-fit: cover; border-radius: 22px; }
.wrap { max-width: 1100px; margin: 0 auto; padding: 0 22px; }

.head .wrap { display: flex; justify-content: space-between; align-items: center; padding: 18px 22px; }
.logo { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--text); font-weight: 800; font-size: 18px; }
.logo span { width: 22px; height: 22px; border-radius: 6px; background: var(--violet); box-shadow: 6px 6px 0 var(--coral); }
.head nav a { margin-left: 22px; text-decoration: none; color: var(--muted); font-weight: 600; font-size: 15px; }

.hero { display: grid; grid-template-columns: 1fr 1.05fr; gap: 46px; align-items: center; padding-top: 34px; }
.hero h1 { font-size: clamp(36px, 5.4vw, 64px); margin: 0 0 16px; color: var(--violet); }
.lead { font-size: 18px; margin: 0; }
.hero img { aspect-ratio: 4 / 3; }

section { padding-top: 64px; }
h2 { font-size: clamp(26px, 3.2vw, 38px); margin: 0 0 22px; }
.cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.card { background: var(--sky); border-radius: 20px; padding: 22px; }
.card b { color: var(--coral); font-size: 22px; }
.card h3 { margin: 6px 0 6px; font-size: 18px; }
.card p { margin: 0; color: var(--muted); font-size: 15.5px; }

.split { display: grid; grid-template-columns: 1fr 1.1fr; gap: 46px; align-items: center; }
.split img { aspect-ratio: 4 / 3; }

.quiz { margin-top: 64px; background: var(--violet); color: #ecebff; border-radius: 26px; padding: 34px 40px; }
.quiz h2 { color: #fff; }
.quiz ol { padding-left: 22px; }
.quiz li { margin-bottom: 6px; }
.quiz p { margin: 0; font-weight: 600; }

.foot { margin-top: 64px; padding: 26px 0; border-top: 1px solid #e5e6ef; color: var(--muted); font-size: 14px; }

@media (max-width: 860px) {
  .hero, .split { grid-template-columns: 1fr; }
  .cards { grid-template-columns: 1fr 1fr; }
  .head nav { display: none; }
}
@media (max-width: 520px) { .cards { grid-template-columns: 1fr; } }