:root { color-scheme: light; --ink: #171321; --muted: #665f70; --purple: #6120a8; --purple-dark: #431078; --lilac: #f0e7fa; --lime: #d9f27b; --paper: #fbf9f5; --line: #ddd7e2; }
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; line-height: 1.55; }
a { color: inherit; }
.site-header, main, footer { width: min(1160px, calc(100% - 40px)); margin-inline: auto; }
.site-header { display: flex; align-items: center; justify-content: space-between; min-height: 86px; }
.brand { display: flex; gap: 10px; align-items: center; font-size: 1.15rem; font-weight: 800; text-decoration: none; }
.brand span { display: grid; width: 38px; height: 38px; place-items: center; border-radius: 12px; background: var(--purple); color: white; font-size: .8rem; }
.site-header nav, footer nav { display: flex; gap: 26px; align-items: center; }
.site-header nav a, footer nav a { color: var(--muted); font-weight: 650; text-decoration: none; }
.site-header nav a:hover, footer nav a:hover { color: var(--purple); }
.site-header .nav-cta { padding: 10px 17px; border: 1px solid var(--ink); border-radius: 999px; color: var(--ink); }
.hero { display: grid; grid-template-columns: 1.15fr .85fr; gap: 70px; align-items: center; min-height: 690px; padding: 70px 0 100px; }
.eyebrow { margin: 0 0 18px; color: var(--purple); font-size: .77rem; font-weight: 850; letter-spacing: .16em; text-transform: uppercase; }
h1 { margin: 0; max-width: 760px; font-size: clamp(3.6rem, 8vw, 7.1rem); line-height: .91; letter-spacing: -.065em; }
h1 em { color: var(--purple); font-family: Georgia, serif; font-weight: 500; }
.lede { max-width: 620px; margin: 32px 0 0; color: var(--muted); font-size: 1.18rem; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }
.button { padding: 14px 21px; border-radius: 13px; font-weight: 750; text-decoration: none; transition: transform .15s ease; }
.button:hover { transform: translateY(-2px); }
.primary { background: var(--purple); color: white; }
.secondary { border: 1px solid var(--ink); }
.free-note { color: var(--muted); font-size: .9rem; }
.study-card { position: relative; overflow: hidden; padding: 34px; border: 1px solid #cfc3d8; border-radius: 28px; background: var(--purple-dark); color: white; box-shadow: 25px 30px 0 var(--lilac); transform: rotate(2deg); }
.study-card::before { content: ""; position: absolute; inset: -110px -80px auto auto; width: 230px; height: 230px; border-radius: 50%; background: var(--lime); opacity: .95; }
.card-top { position: relative; display: flex; justify-content: space-between; color: #d8c6e9; }
.card-top strong { color: var(--lime); font-size: 2rem; }
.subject { position: relative; margin: 70px 0 18px; font: 600 clamp(2.2rem, 5vw, 4.2rem)/1 Georgia, serif; }
.progress { height: 9px; border-radius: 20px; background: #76509b; }
.progress span { display: block; width: 90%; height: 100%; border-radius: inherit; background: var(--lime); }
.study-card p { color: #dfd2ea; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chips span { padding: 7px 10px; border: 1px solid #8565a3; border-radius: 99px; font-size: .78rem; }
.features { padding: 110px 0; border-top: 1px solid var(--line); }
h2 { max-width: 720px; margin: 0; font-size: clamp(2.2rem, 5vw, 4.4rem); line-height: 1.05; letter-spacing: -.04em; }
.feature-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-top: 56px; }
.feature-grid article { min-height: 285px; padding: 25px; border: 1px solid var(--line); border-radius: 18px; background: white; }
.feature-grid b { color: var(--purple); font-size: .8rem; }
.feature-grid h3 { margin-top: 65px; font-size: 1.3rem; }
.feature-grid p { color: var(--muted); }
.trust { display: grid; grid-template-columns: 1fr 1fr; gap: 70px; margin-bottom: 110px; padding: 65px; border-radius: 28px; background: var(--lilac); }
.trust > p { margin: 36px 0 0; color: var(--muted); font-size: 1.08rem; }
.trust-links { grid-column: 2; display: flex; gap: 28px; }
.trust-links a { color: var(--purple); font-weight: 750; }
footer { display: grid; grid-template-columns: 1fr auto; gap: 30px; padding: 45px 0 55px; border-top: 1px solid var(--line); color: var(--muted); }
.footer-brand { color: var(--ink); font-size: 1.25rem; font-weight: 850; }
footer p { margin: 7px 0 0; font-size: .9rem; }
footer > p { grid-column: 1 / -1; }
@media (max-width: 850px) {
  .site-header nav a:not(.nav-cta) { display: none; }
  .hero { grid-template-columns: 1fr; gap: 55px; padding-top: 55px; }
  .study-card { max-width: 560px; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .trust { grid-template-columns: 1fr; padding: 38px; }
  .trust-links { grid-column: 1; }
  footer { grid-template-columns: 1fr; }
  footer nav { flex-wrap: wrap; }
}
@media (max-width: 520px) {
  .site-header, main, footer { width: min(100% - 28px, 1160px); }
  .hero { min-height: auto; padding-bottom: 80px; }
  h1 { font-size: clamp(3.25rem, 17vw, 5.2rem); }
  .study-card { padding: 25px; box-shadow: 11px 14px 0 var(--lilac); }
  .feature-grid { grid-template-columns: 1fr; }
  .feature-grid article { min-height: 230px; }
  .trust { margin-bottom: 70px; padding: 28px; }
  .trust-links { flex-direction: column; gap: 12px; }
}