:root {
  --dd-bg: #fafafa;
  --dd-paper: #ffffff;
  --dd-ink: #0d0d0d;
  --dd-muted: #5c5c5c;
  --dd-line: #e5e5e5;
  --dd-accent: #177cc3;
  --dd-side: #f4f4f4;
  --dd-code: #111111;
  --font: "IBM Plex Sans", "Segoe UI", system-ui, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body {
  font-family: var(--font);
  background: var(--dd-bg);
  color: var(--dd-ink);
  letter-spacing: -0.011em;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
}

.dd-top {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  gap: 0.85rem;
  height: 56px;
  padding: 0 1.1rem;
  background: var(--dd-paper);
  border-bottom: 1px solid var(--dd-line);
}
.dd-menu {
  display: none;
  border: 0;
  background: transparent;
  font-size: 1.2rem;
  cursor: pointer;
}
.dd-brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 650;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.86rem;
}
.dd-brand img { width: 22px; height: 24px; }
.dd-crumb {
  color: var(--dd-muted);
  font-size: 0.92rem;
}
.dd-crumb::before { content: "/"; margin-right: 0.65rem; color: #bbb; }
.dd-search { margin-left: auto; }
.dd-search input {
  width: min(280px, 34vw);
  border: 1px solid var(--dd-line);
  border-radius: 8px;
  padding: 0.42rem 0.7rem;
  font: inherit;
  background: var(--dd-bg);
}
.dd-search input:focus {
  outline: 2px solid rgba(23, 124, 195, 0.35);
  border-color: var(--dd-accent);
}
.dd-top-cta { display: flex; align-items: center; gap: 0.65rem; }
.dd-link { color: var(--dd-muted); font-size: 0.9rem; font-weight: 500; }
.dd-link:hover { color: var(--dd-ink); }
.dd-btn {
  background: var(--dd-ink);
  color: #fff;
  border-radius: 999px;
  padding: 0.38rem 0.85rem;
  font-size: 0.88rem;
  font-weight: 600;
}

.dd-shell {
  display: grid;
  grid-template-columns: 248px minmax(0, 1fr);
  min-height: calc(100vh - 56px);
}
.dd-side {
  position: sticky;
  top: 56px;
  align-self: start;
  height: calc(100vh - 56px);
  overflow: auto;
  padding: 1.15rem 0.7rem 2rem 1.1rem;
  background: var(--dd-side);
  border-right: 1px solid var(--dd-line);
  display: flex;
  flex-direction: column;
  gap: 0.12rem;
}
.dd-group {
  margin: 1.05rem 0 0.28rem;
  padding: 0 0.55rem;
  font-size: 0.68rem;
  font-weight: 650;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #8a8a8a;
}
.dd-group:first-child { margin-top: 0.2rem; }
.dd-side a {
  display: block;
  padding: 0.38rem 0.55rem;
  border-radius: 8px;
  color: #3f3f3f;
  font-size: 0.92rem;
}
.dd-side a:hover { background: #ececec; color: var(--dd-ink); }
.dd-side a.active {
  background: #fff;
  color: var(--dd-ink);
  font-weight: 600;
  box-shadow: inset 2px 0 0 var(--dd-accent);
}
.dd-side a.hidden { display: none; }

.dd-main {
  padding: 2.4rem 2.2rem 4rem;
  max-width: 820px;
}
.dd-kicker {
  margin: 0 0 0.55rem;
  font-size: 0.78rem;
  font-weight: 650;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--dd-accent);
}
.dd-page h1 {
  margin: 0 0 0.85rem;
  font-size: clamp(1.8rem, 3vw, 2.35rem);
  letter-spacing: -0.04em;
  line-height: 1.15;
}
.dd-lead {
  margin: 0 0 1.5rem;
  color: var(--dd-muted);
  font-size: 1.08rem;
  line-height: 1.55;
  max-width: 42rem;
}
.dd-page p, .dd-page li {
  line-height: 1.65;
  font-size: 1.02rem;
}
.dd-page p { margin: 0 0 0.9rem; }
.dd-page a { color: var(--dd-accent); font-weight: 600; }
.dd-page code {
  font-family: var(--mono);
  font-size: 0.86em;
  background: #efefef;
  padding: 0.08em 0.35em;
  border-radius: 5px;
}
.dd-page pre {
  background: var(--dd-code);
  color: #f3f3f3;
  border-radius: 12px;
  padding: 1rem 1.05rem;
  overflow: auto;
  margin: 0.4rem 0 1.15rem;
}
.dd-page pre code {
  background: none;
  color: inherit;
  padding: 0;
  font-size: 0.86rem;
}
.dd-cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.75rem;
  margin: 1.4rem 0 2rem;
}
.dd-card {
  display: grid;
  gap: 0.35rem;
  padding: 1rem 1.05rem;
  background: var(--dd-paper);
  border: 1px solid var(--dd-line);
  border-radius: 14px;
  color: inherit;
}
.dd-card:hover { border-color: #c8c8c8; }
.dd-card strong { font-size: 0.98rem; }
.dd-card span { color: var(--dd-muted); font-size: 0.9rem; line-height: 1.45; font-weight: 400; }
.dd-steps {
  list-style: none;
  margin: 0 0 1.4rem;
  padding: 0;
  counter-reset: step;
  display: grid;
  gap: 1.15rem;
}
.dd-steps li {
  position: relative;
  padding-left: 2.4rem;
}
.dd-steps li::before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  left: 0;
  top: 0.05rem;
  width: 1.7rem;
  height: 1.7rem;
  border-radius: 999px;
  background: var(--dd-ink);
  color: #fff;
  font-size: 0.82rem;
  font-weight: 650;
  display: grid;
  place-items: center;
}
.dd-steps h2 {
  margin: 0 0 0.28rem;
  font-size: 1.05rem;
}
.dd-list { margin: 0 0 1rem; padding-left: 1.15rem; display: grid; gap: 0.4rem; }
.dd-note {
  background: #eef6fb;
  border: 1px solid #d5e7f3;
  border-radius: 12px;
  padding: 0.95rem 1rem;
  margin: 0 0 1.2rem;
}
.dd-note strong { display: block; margin-bottom: 0.3rem; }
.dd-note p { margin: 0 0 0.7rem; }
.dd-note p:last-child { margin-bottom: 0; }
.dd-files {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  margin: 0.4rem 0 1.4rem;
}
.dd-file {
  display: grid;
  gap: 0.2rem;
  padding: 0.95rem 1rem;
  border: 1px solid var(--dd-line);
  border-radius: 12px;
  background: var(--dd-paper);
  color: inherit;
  font-weight: 400;
}
.dd-file:hover { border-color: var(--dd-accent); }
.dd-file strong { color: var(--dd-ink); }
.dd-file span { color: var(--dd-muted); font-size: 0.88rem; }
.dd-pager {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 2.4rem;
  padding-top: 1.1rem;
  border-top: 1px solid var(--dd-line);
  font-weight: 600;
  font-size: 0.95rem;
}
.dd-pager a { color: var(--dd-ink); }
.dd-pager a:hover { color: var(--dd-accent); }
.dd-fine {
  color: var(--dd-muted);
  font-size: 0.9rem;
  margin: -0.4rem 0 1.2rem;
}
.dd-side .dd-group.hidden { display: none; }
.dd-code {
  position: relative;
}
.dd-copy {
  position: absolute;
  top: 0.55rem;
  right: 0.55rem;
  border: 0;
  background: #2a2a2a;
  color: #eee;
  border-radius: 7px;
  padding: 0.28rem 0.55rem;
  font: 500 0.75rem var(--font);
  cursor: pointer;
}
.dd-copy:hover { background: #3a3a3a; }
.dd-page pre { padding-right: 5.2rem; }
.dd-search kbd {
  display: none;
}

@media (max-width: 900px) {
  .dd-menu { display: block; }
  .dd-crumb { display: none; }
  .dd-search input { width: 38vw; }
  .dd-shell { grid-template-columns: 1fr; }
  .dd-side {
    display: none;
    position: fixed;
    inset: 56px auto 0 0;
    width: min(300px, 88vw);
    z-index: 20;
    box-shadow: 16px 0 40px rgba(0, 0, 0, 0.08);
  }
  body.side-open .dd-side { display: flex; }
  .dd-cards, .dd-files { grid-template-columns: 1fr; }
  .dd-main { padding: 1.5rem 1.1rem 3rem; }
}