:root {
  color-scheme: light;
  --ink: #15202b;
  --muted: #607080;
  --line: #d7dee7;
  --panel: #ffffff;
  --bg: #f4f7fb;
  --accent: #0f7b6c;
  --accent-dark: #0a574c;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: var(--bg);
  color: var(--ink);
}

header {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 32px;
  border-bottom: 1px solid var(--line);
  background: #fff;
}

h1, h2, p { margin-top: 0; }
.eyebrow { text-transform: uppercase; letter-spacing: .08em; color: var(--accent-dark); font-weight: 700; font-size: 12px; }
nav { display: flex; gap: 12px; align-items: flex-start; flex-wrap: wrap; }
a { color: var(--accent-dark); font-weight: 700; }
main { padding: 24px 32px 48px; }
.metrics, .grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; margin-bottom: 16px; }
.grid { grid-template-columns: 1.2fr .8fr; align-items: start; }
.metrics article, .panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 18px;
}
.metrics strong { display: block; font-size: 26px; margin-bottom: 6px; }
.metrics span, .offer span, .steps span { color: var(--muted); }
form { display: grid; gap: 12px; }
label { display: grid; gap: 6px; font-weight: 700; }
input, select, button {
  width: 100%;
  padding: 10px 12px;
  border-radius: 6px;
  border: 1px solid var(--line);
  font: inherit;
}
.check { display: flex; align-items: center; gap: 8px; }
.check input { width: auto; }
button { background: var(--accent); color: #fff; border: 0; font-weight: 700; cursor: pointer; }
pre { overflow: auto; padding: 12px; background: #0e1720; color: #d7f8ee; border-radius: 8px; min-height: 96px; }
.offer, .steps div { padding: 12px 0; border-top: 1px solid var(--line); display: grid; gap: 4px; }
.offer:first-of-type, .steps div:first-child { border-top: 0; }
.steps { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; }

@media (max-width: 860px) {
  header, .grid { grid-template-columns: 1fr; display: grid; }
  .metrics, .steps { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 560px) {
  header, main { padding: 20px; }
  .metrics, .steps { grid-template-columns: 1fr; }
}