:root {
  --ink: #142321;
  --muted: #3d524f;
  --line: #d5e3e0;
  --paper: #f3f7f6;
  --card: #ffffff;
  --primary: #00514d;
  --primary-deep: #003936;
  --accent: #e6f5f3;
  --warn: #7a3418;
  --warn-bg: #fff4ec;
  --max: 46rem;
  --shadow: 0 1px 2px rgba(20, 35, 33, 0.06);
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink: #e7f3f1;
    --muted: #b7cbc7;
    --line: #2c4541;
    --paper: #0e1716;
    --card: #162220;
    --primary: #8ed9d2;
    --primary-deep: #d5f4f1;
    --accent: #1c3330;
    --warn: #ffd0b8;
    --warn-bg: #3a2418;
    --shadow: none;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: "Segoe UI", "Iowan Old Style", Palatino, Georgia, serif;
  font-size: 1.05rem;
  line-height: 1.6;
  color: var(--ink);
  background: var(--paper);
}

a { color: var(--primary); }

a:hover { color: var(--primary-deep); }

.skip {
  position: absolute;
  left: 0.75rem;
  top: -3rem;
  background: var(--primary);
  color: #fff;
  padding: 0.4rem 0.7rem;
  z-index: 5;
}

.skip:focus { top: 0.75rem; }

.wrap {
  width: min(var(--max), calc(100% - 2rem));
  margin: 0 auto;
}

header.site {
  background: var(--card);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 2;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  padding: 0.9rem 0 0.2rem;
  text-decoration: none;
  color: inherit;
}

.brand img { width: 2rem; height: 2rem; }

.brand strong {
  font-family: "Segoe UI", sans-serif;
  font-size: 1.05rem;
  letter-spacing: 0.01em;
}

.brand span {
  display: block;
  font-family: "Segoe UI", sans-serif;
  font-size: 0.78rem;
  color: var(--muted);
  font-weight: 400;
}

nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 0.9rem;
  list-style: none;
  padding: 0.35rem 0 0.85rem;
  margin: 0;
  font-family: "Segoe UI", sans-serif;
  font-size: 0.86rem;
}

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

nav a[aria-current="page"] {
  color: var(--primary);
  font-weight: 650;
  text-decoration: underline;
  text-underline-offset: 0.2rem;
}

main { padding: 1.6rem 0 3rem; }

article {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 1rem;
  padding: 1.4rem 1.3rem 1.6rem;
  box-shadow: var(--shadow);
}

h1 {
  font-family: "Segoe UI", sans-serif;
  font-size: 1.85rem;
  line-height: 1.2;
  margin: 0 0 0.4rem;
  letter-spacing: -0.02em;
}

.meta {
  font-family: "Segoe UI", sans-serif;
  color: var(--muted);
  font-size: 0.86rem;
  margin: 0 0 1.2rem;
}

h2 {
  font-family: "Segoe UI", sans-serif;
  font-size: 1.15rem;
  margin: 1.6rem 0 0.45rem;
  line-height: 1.3;
}

h3 {
  font-family: "Segoe UI", sans-serif;
  font-size: 1rem;
  margin: 1.1rem 0 0.3rem;
}

p, li { margin: 0.45rem 0; }

ul, ol { padding-left: 1.2rem; }

table {
  width: 100%;
  border-collapse: collapse;
  font-family: "Segoe UI", sans-serif;
  font-size: 0.92rem;
  margin: 0.8rem 0 1rem;
}

th, td {
  border: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
  padding: 0.45rem 0.5rem;
}

th { background: var(--accent); }

.note {
  background: var(--accent);
  border-radius: 0.75rem;
  padding: 0.8rem 0.9rem;
  margin: 1rem 0;
}

.warn {
  background: var(--warn-bg);
  color: var(--warn);
  border-radius: 0.75rem;
  padding: 0.8rem 0.9rem;
  margin: 1rem 0;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1rem 0 0.2rem;
}

.button {
  font-family: "Segoe UI", sans-serif;
  display: inline-block;
  text-decoration: none;
  background: var(--primary);
  color: #f4fffd;
  border-radius: 999px;
  padding: 0.55rem 0.95rem;
  font-size: 0.92rem;
}

.button.secondary {
  background: transparent;
  color: var(--primary);
  border: 1px solid var(--primary);
}

footer.site {
  border-top: 1px solid var(--line);
  padding: 1.2rem 0 2rem;
  color: var(--muted);
  font-family: "Segoe UI", sans-serif;
  font-size: 0.82rem;
}

footer.site ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 0.9rem;
  padding: 0;
  margin: 0 0 0.6rem;
}

:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

@media print {
  header.site, footer.site, .skip, .actions { display: none; }
  body { background: #fff; color: #000; }
  article { border: 0; box-shadow: none; padding: 0; }
  a { color: #000; }
}