:root {
  color-scheme: light;
  --jade: #0f9f78;
  --action-jade: #0a755a;
  --mint: #62d6ae;
  --ink: #151a1e;
  --cream: #f6f2e8;
  --surface: #ffffff;
  --background: #f5f8f7;
  --outline: #d5e1dd;
  font-family: "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  color: var(--ink);
  background: var(--background);
  line-height: 1.6;
}

header {
  background: linear-gradient(120deg, var(--jade), var(--action-jade));
  color: white;
}

.header-inner,
main,
footer {
  width: min(760px, calc(100% - 40px));
  margin: 0 auto;
}

.header-inner { padding: 52px 0 46px; }

.brand {
  display: flex;
  align-items: center;
  gap: 16px;
}

.brand img {
  width: 64px;
  height: 64px;
  border-radius: 16px;
}

h1 { margin: 0; font-size: clamp(2rem, 7vw, 3.2rem); line-height: 1.1; }
.subtitle { margin: 14px 0 0; color: #e7fff6; font-size: 1.05rem; }

main { padding: 36px 0 56px; }

section {
  padding: 24px;
  margin: 0 0 18px;
  background: var(--surface);
  border: 1px solid var(--outline);
  border-radius: 18px;
}

h2 { margin: 0 0 10px; font-size: 1.35rem; }
p, ul { margin-top: 0; }
li + li { margin-top: 6px; }

a { color: var(--action-jade); font-weight: 650; }

.button {
  display: inline-block;
  padding: 12px 18px;
  color: white;
  background: var(--action-jade);
  border-radius: 12px;
  text-decoration: none;
}

.meta { color: #53635d; }
footer { padding: 0 0 40px; color: #53635d; }

@media (max-width: 520px) {
  .header-inner { padding-top: 34px; }
  section { padding: 20px; }
}