:root {
  color-scheme: light;
  --bg: #f7f8f4;
  --panel: #ffffff;
  --ink: #1d2523;
  --muted: #5f6f69;
  --line: #dfe5dd;
  --code-bg: #17201d;
  --code-ink: #e9f4ed;
  --accent: #0f766e;
  --accent-strong: #115e59;
  --warm: #b45309;
  --sidebar: #17201d;
  --sidebar-muted: #b9c7c0;
  --sidebar-line: #2d3a35;
  --shadow: 0 18px 45px rgba(23, 32, 29, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.65;
  letter-spacing: 0;
}

a {
  color: var(--accent-strong);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--warm);
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -4rem;
  z-index: 10;
  padding: 0.6rem 0.8rem;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 6px;
}

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

.site-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
}

.sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  padding: 1.25rem;
  background: var(--sidebar);
  color: #f6fbf8;
  border-right: 1px solid var(--sidebar-line);
  overflow-y: auto;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: #ffffff;
  text-decoration: none;
  margin-bottom: 1.5rem;
}

.brand img {
  width: 44px;
  height: 44px;
  flex: 0 0 auto;
}

.brand strong,
.brand small {
  display: block;
}

.brand small {
  color: var(--sidebar-muted);
  font-size: 0.84rem;
}

.nav-list {
  display: grid;
  gap: 0.25rem;
}

.nav-list a {
  color: var(--sidebar-muted);
  text-decoration: none;
  padding: 0.62rem 0.75rem;
  border-radius: 6px;
}

.nav-list a:hover,
.nav-list a[aria-current="page"] {
  color: #ffffff;
  background: #24322d;
}

.sidebar-footer {
  margin-top: 2rem;
  padding-top: 1rem;
  border-top: 1px solid var(--sidebar-line);
  display: grid;
  gap: 0.45rem;
  font-size: 0.9rem;
}

.sidebar-footer a {
  color: var(--sidebar-muted);
}

.content {
  min-width: 0;
  padding: 3rem 2rem 5rem;
}

.doc {
  width: min(100%, 980px);
  margin: 0 auto;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
  padding: clamp(1.25rem, 4vw, 3rem);
}

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

h1,
h2,
h3 {
  line-height: 1.2;
  letter-spacing: 0;
}

h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
  margin: 0 0 1rem;
}

h2 {
  margin-top: 2.3rem;
  padding-top: 0.25rem;
  font-size: 1.55rem;
}

h3 {
  margin-top: 1.6rem;
  font-size: 1.12rem;
}

p,
ul,
ol,
table,
pre {
  margin-bottom: 1.1rem;
}

blockquote {
  margin: 1.25rem 0;
  padding: 0.9rem 1rem;
  border-left: 4px solid var(--accent);
  background: #edf7f3;
  color: #263530;
}

code {
  background: #edf0ea;
  border: 1px solid #d8ded6;
  border-radius: 5px;
  padding: 0.12rem 0.28rem;
  font-size: 0.92em;
}

pre {
  overflow-x: auto;
  background: var(--code-bg);
  color: var(--code-ink);
  padding: 1rem;
  border-radius: 8px;
}

pre code {
  background: transparent;
  border: 0;
  padding: 0;
  color: inherit;
}

table {
  width: 100%;
  border-collapse: collapse;
  display: block;
  overflow-x: auto;
}

th,
td {
  border: 1px solid var(--line);
  padding: 0.65rem 0.75rem;
  text-align: left;
  vertical-align: top;
}

th {
  background: #eef2ec;
}

.hero {
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--line);
  margin-bottom: 1.5rem;
}

.hero p {
  max-width: 760px;
  color: var(--muted);
  font-size: 1.08rem;
}

.callout-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.9rem;
  margin: 1.5rem 0;
}

.callout {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 1rem;
  background: #fbfcf8;
}

.callout strong {
  display: block;
  margin-bottom: 0.25rem;
}

@media (max-width: 860px) {
  .site-shell {
    display: block;
  }

  .sidebar {
    position: static;
    height: auto;
  }

  .nav-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .content {
    padding: 1rem;
  }

  .doc {
    border-radius: 8px;
  }

  .callout-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 520px) {
  .nav-list {
    grid-template-columns: 1fr;
  }

  .doc {
    padding: 1.1rem;
  }
}