:root {
  color-scheme: light dark;
  --background: #f7f5ef;
  --surface: #fffdf8;
  --text: #1c211e;
  --muted: #59635d;
  --accent: #356755;
  --accent-strong: #214b3d;
  --border: #d9ddd7;
  --focus: #9b5b21;
  --max-width: 760px;
}

* {
  box-sizing: border-box;
}

html {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", sans-serif;
  font-size: 17px;
  line-height: 1.65;
  scroll-behavior: smooth;
}

body {
  background: var(--background);
  color: var(--text);
  margin: 0;
}

a {
  color: var(--accent-strong);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.16em;
}

a:hover {
  text-decoration-thickness: 0.14em;
}

a:focus-visible {
  border-radius: 0.2rem;
  outline: 3px solid var(--focus);
  outline-offset: 3px;
}

.skip-link {
  background: var(--text);
  color: var(--background);
  left: 1rem;
  padding: 0.6rem 0.9rem;
  position: fixed;
  top: -5rem;
  z-index: 10;
}

.skip-link:focus {
  top: 1rem;
}

.site-header {
  background: color-mix(in srgb, var(--surface) 92%, transparent);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  align-items: center;
  display: flex;
  gap: 1.25rem;
  justify-content: space-between;
  margin: 0 auto;
  max-width: calc(var(--max-width) + 3rem);
  padding: 1rem 1.5rem;
}

.brand {
  align-items: center;
  color: var(--text);
  display: inline-flex;
  font-size: 1.05rem;
  font-weight: 700;
  gap: 0.55rem;
  text-decoration: none;
}

.brand-mark {
  color: var(--accent);
  font-size: 1.55rem;
  line-height: 1;
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem 1rem;
  justify-content: flex-end;
}

nav a {
  font-size: 0.94rem;
  font-weight: 600;
}

.content {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 1rem;
  margin: 2rem auto;
  max-width: var(--max-width);
  overflow-wrap: anywhere;
  padding: clamp(1.4rem, 4vw, 3rem);
}

.content > :first-child {
  margin-top: 0;
}

.content > :last-child {
  margin-bottom: 0;
}

h1,
h2,
h3 {
  line-height: 1.25;
  scroll-margin-top: 1rem;
}

h1 {
  font-size: clamp(2rem, 6vw, 3rem);
  letter-spacing: -0.035em;
  margin-bottom: 1.25rem;
}

h2 {
  border-top: 1px solid var(--border);
  font-size: clamp(1.35rem, 4vw, 1.7rem);
  margin-top: 2.75rem;
  padding-top: 1.5rem;
}

h3 {
  font-size: 1.1rem;
  margin-top: 1.75rem;
}

p,
ul,
ol {
  margin-bottom: 1.15rem;
  margin-top: 0;
}

li + li {
  margin-top: 0.45rem;
}

strong {
  font-weight: 700;
}

.site-footer {
  color: var(--muted);
  font-size: 0.86rem;
  margin: 0 auto;
  max-width: var(--max-width);
  padding: 0 1.5rem 2.5rem;
  text-align: center;
}

.site-footer p {
  margin: 0;
}

@media (max-width: 640px) {
  html {
    font-size: 16px;
  }

  .header-inner {
    align-items: flex-start;
    flex-direction: column;
    padding: 0.9rem 1rem;
  }

  nav {
    justify-content: flex-start;
  }

  .content {
    border-left: 0;
    border-radius: 0;
    border-right: 0;
    margin: 1rem 0;
    padding: 1.4rem 1rem 2rem;
  }
}

@media (prefers-color-scheme: dark) {
  :root {
    --background: #111512;
    --surface: #181e1a;
    --text: #eef2ee;
    --muted: #acb8b0;
    --accent: #9bcab7;
    --accent-strong: #b8e6d3;
    --border: #36413a;
    --focus: #f2aa62;
  }
}