:root {
  font-family: "Segoe UI", system-ui, sans-serif;
  color: #17252e;
  background: #f5f8fa;
  line-height: 1.55;
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
body { margin: 0; }
header, main, footer { width: min(100% - 40px, 960px); margin-inline: auto; }
header { display: flex; align-items: center; justify-content: space-between; gap: 18px; padding-block: 24px; border-bottom: 1px solid #d6e2e9; }
header img { display: block; max-width: 100%; height: auto; }
nav, .actions { display: flex; gap: 16px; align-items: center; flex-wrap: wrap; }
a { color: #075984; text-underline-offset: 3px; }
.hero { display: grid; grid-template-columns: minmax(0, 1fr) minmax(210px, .52fr); gap: 48px; align-items: center; padding: clamp(36px, 9vw, 90px) 0; }
h1 { max-width: 12ch; margin: 0; font-size: clamp(2.5rem, 7vw, 4.8rem); line-height: .99; letter-spacing: -.045em; }
h2 { margin: 0 0 12px; font-size: 1.55rem; letter-spacing: -.02em; }
p { max-width: 50ch; color: #43545f; }
.actions { margin-top: 24px; }
.button, button { background: #075984; color: white; border: 1px solid #075984; font: inherit; font-weight: 600; text-decoration: none; padding: 11px 16px; border-radius: 7px; cursor: pointer; }
button:disabled { opacity: .55; cursor: wait; }
a:focus-visible, button:focus-visible, input:focus-visible { outline: 3px solid #27a1dc; outline-offset: 3px; }
.mascot { display: block; width: 100%; max-width: 360px; height: auto; }
.panel { max-width: 510px; margin: 0 0 32px; background: white; border: 1px solid #d6e2e9; border-radius: 12px; padding: 22px; }
form { display: grid; gap: 14px; }
label { display: grid; gap: 5px; }
input { width: 100%; padding: 10px 11px; border: 1px solid #81939f; border-radius: 6px; font: inherit; }
.feedback { margin: 0; }
.feedback:empty { display: none; }
form + a { display: inline-block; margin-top: 12px; }
.plans { border-top: 1px solid #d6e2e9; padding: 30px 0 44px; }
dl { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 18px; }
dl > div { background: white; border: 1px solid #d6e2e9; border-radius: 12px; padding: 16px; }
dt { font-weight: 700; }
dd { margin: 3px 0 0; color: #43545f; }
.price { color: #17252e; font-size: 1.35rem; font-weight: 700; }
.price span { color: #43545f; font-size: .85rem; font-weight: 400; }
footer { border-top: 1px solid #d6e2e9; padding: 24px 0; color: #43545f; font-size: .875rem; }
@media (max-width: 620px) {
  .hero { grid-template-columns: 1fr; gap: 25px; }
  .mascot { max-width: 250px; }
  header { align-items: flex-start; }
  header img { width: 120px; }
  nav { justify-content: flex-end; gap: 8px 14px; }
  dl { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}