:root {
  --sage-50: #f5f7f2;
  --sage-100: #e8ede3;
  --sage-200: #d5dfce;
  --sage-300: #b9c9ae;
  --sage-500: #7d9473;
  --sage-600: #64795c;
  --sage-700: #4c6047;
  --sage-900: #293629;

  --cream: #fbf8f1;
  --warm-white: #fffdf8;
  --wood: #8a684c;
  --text: #293129;
  --muted: #697269;
  --border: rgba(76, 96, 71, 0.16);

  --content-width: 760px;
  --radius: 22px;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--sage-50);
  color: var(--text);
  font-family:
    Inter,
    ui-sans-serif,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;
  line-height: 1.65;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(
      circle at 50% -10%,
      rgba(185, 201, 174, 0.55),
      transparent 42rem
    ),
    linear-gradient(180deg, var(--sage-50), var(--cream));
}

a {
  color: var(--sage-700);
  text-decoration-color: var(--sage-300);
  text-underline-offset: 4px;
}

a:hover {
  color: var(--sage-900);
}

.shell {
  width: min(calc(100% - 40px), var(--content-width));
  margin: 0 auto;
}

header {
  padding: 34px 0 0;
}

nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  color: var(--sage-900);
  font-size: 0.95rem;
  font-weight: 650;
  letter-spacing: 0.02em;
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: 22px;
  font-size: 0.9rem;
}

.nav-links a {
  color: var(--muted);
  text-decoration: none;
}

.nav-links a:hover {
  color: var(--sage-900);
}

main {
  padding: 72px 0 80px;
}

.hero {
  text-align: center;
}

.logo {
  display: block;
  width: min(310px, 70vw);
  height: auto;
  margin: 0 auto 38px;
  border-radius: 50%;
  box-shadow:
    0 24px 70px rgba(41, 54, 41, 0.13),
    0 4px 16px rgba(41, 54, 41, 0.08);
}

h1,
h2 {
  color: var(--sage-900);
  font-family:
    Georgia,
    "Times New Roman",
    serif;
  font-weight: 500;
  line-height: 1.15;
}

h1 {
  margin: 0;
  font-size: clamp(2.8rem, 8vw, 4.7rem);
  letter-spacing: -0.04em;
}

.tagline {
  margin: 16px 0 0;
  color: var(--sage-600);
  font-family:
    Georgia,
    "Times New Roman",
    serif;
  font-size: clamp(1.25rem, 3vw, 1.55rem);
  font-style: italic;
}

.intro {
  max-width: 590px;
  margin: 30px auto 0;
  color: var(--muted);
  font-size: 1.05rem;
}

.private-note {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin-top: 32px;
  padding: 9px 15px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: rgba(255, 253, 248, 0.65);
  color: var(--sage-700);
  font-size: 0.82rem;
}

.private-note::before {
  content: "●";
  color: var(--sage-500);
  font-size: 0.55rem;
}

.content-card {
  margin-top: 42px;
  padding: clamp(26px, 6vw, 48px);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: rgba(255, 253, 248, 0.78);
  box-shadow: 0 18px 50px rgba(41, 54, 41, 0.06);
}

.content-card h1 {
  margin-bottom: 10px;
  font-size: clamp(2.3rem, 7vw, 3.5rem);
}

.content-card h2 {
  margin-top: 2.2em;
  font-size: 1.35rem;
}

.content-card p,
.content-card li {
  color: #505950;
}

.content-card ul {
  padding-left: 1.25rem;
}

.updated {
  margin-bottom: 34px;
  color: var(--muted);
  font-size: 0.88rem;
}

footer {
  padding: 0 0 42px;
  text-align: center;
}

footer::before {
  content: "";
  display: block;
  width: 48px;
  height: 1px;
  margin: 0 auto 24px;
  background: var(--sage-300);
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 22px;
  margin-bottom: 12px;
  font-size: 0.86rem;
}

.footer-links a {
  color: var(--muted);
  text-decoration: none;
}

footer p {
  margin: 0;
  color: #899189;
  font-size: 0.78rem;
}

@media (max-width: 560px) {
  header {
    padding-top: 24px;
  }

  .nav-links {
    gap: 14px;
  }

  main {
    padding-top: 52px;
  }

  .logo {
    width: min(250px, 70vw);
  }
}