:root {
  --paper: #f7f2e8;
  --surface: #fffdf8;
  --ink: #25251f;
  --ink-soft: #656359;
  --muted: #918d81;
  --green: #5f806d;
  --green-deep: #3f6250;
  --green-soft: #e4eee7;
  --terracotta: #c8755b;
  --line: #e7dfd2;
  --shadow: 0 18px 50px rgba(51, 62, 54, 0.08);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Avenir Next", "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at 90% 0%, rgba(95, 128, 109, 0.14), transparent 30rem),
    var(--paper);
  color: var(--ink);
  line-height: 1.65;
}

header {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid rgba(231, 223, 210, 0.9);
  background: rgba(255, 253, 248, 0.88);
  backdrop-filter: blur(18px);
}

.nav {
  max-width: 820px;
  margin: 0 auto;
  padding: 15px 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
}

.brand {
  color: var(--green-deep);
  font-size: 19px;
  font-weight: 750;
  letter-spacing: -0.3px;
  text-decoration: none;
}

.nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav a { color: var(--ink-soft); font-size: 14px; text-decoration: none; }
.nav a:hover { color: var(--green-deep); }

main {
  max-width: 820px;
  min-height: calc(100vh - 150px);
  margin: 0 auto;
  padding: 42px 22px 72px;
}

article {
  padding: 34px clamp(22px, 5vw, 54px) 48px;
  border: 1px solid var(--line);
  border-radius: 28px;
  background: rgba(255, 253, 248, 0.94);
  box-shadow: var(--shadow);
}

h1, h2, h3 { line-height: 1.22; }
h1 { margin: 0 0 8px; font-size: clamp(32px, 7vw, 48px); letter-spacing: -1.2px; }
h2 { margin-top: 38px; font-size: 22px; color: var(--green-deep); }
h3 { margin-top: 24px; font-size: 17px; }
p, li { color: var(--ink-soft); }
strong { color: var(--ink); }
a { color: var(--green-deep); }
.meta { color: var(--muted); font-size: 14px; }

.hero { padding: 54px 0 28px; text-align: center; }
.hero h1 { color: var(--green-deep); }
.hero p { max-width: 570px; margin: 14px auto 0; font-size: 18px; }

.pill {
  display: inline-flex;
  align-items: center;
  margin-bottom: 14px;
  padding: 7px 12px;
  border-radius: 999px;
  background: var(--green-soft);
  color: var(--green-deep);
  font-size: 13px;
  font-weight: 700;
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-top: 28px;
}

.card {
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.card h2 { margin: 0 0 8px; font-size: 18px; }
.card p { margin: 0 0 16px; font-size: 14px; }
.card a { font-weight: 700; }

.notice {
  margin: 24px 0;
  padding: 18px 20px;
  border-radius: 18px;
  background: var(--green-soft);
}

footer {
  padding: 26px 20px 34px;
  color: var(--muted);
  font-size: 13px;
  text-align: center;
}

@media (max-width: 650px) {
  .nav { align-items: flex-start; flex-direction: column; gap: 8px; }
  .nav ul { gap: 12px; }
  main { padding-top: 24px; }
  article { border-radius: 22px; }
  .grid { grid-template-columns: 1fr; }
}