:root {
  --ink: #1c2c38;
  --muted: #5d6d77;
  --line: #dce5e9;
  --blue: #28678d;
  --pale: #f3f7f9;
  --white: #fff;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: #fbfcfd;
  font-family: Arial, Helvetica, sans-serif;
  line-height: 1.65;
}

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

.docs-header {
  position: sticky;
  z-index: 10;
  top: 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 2rem;
  padding: 0.9rem max(1.25rem, calc((100vw - 1160px) / 2));
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.96);
}

.docs-brand {
  color: var(--ink);
  font-weight: 700;
  text-decoration: none;
}

.docs-brand span {
  margin-left: 0.35rem;
  color: var(--muted);
  font-weight: 400;
}

.docs-header nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1.2rem;
}

.docs-header nav a {
  color: #465a67;
  font-size: 0.82rem;
  font-weight: 700;
  text-decoration: none;
}

.docs-hero {
  max-width: 1160px;
  margin: 2rem auto 0;
  padding: clamp(3rem, 7vw, 5.5rem);
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--white);
}

.eyebrow,
.section-label {
  margin: 0;
  color: var(--blue);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.docs-hero h1 {
  margin: 0.4rem 0 0;
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  line-height: 1.05;
  letter-spacing: -0.045em;
}

.lead {
  max-width: 750px;
  margin: 1.2rem 0 0;
  color: #415765;
  font-size: clamp(1.08rem, 2vw, 1.35rem);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.8rem;
}

.hero-actions a {
  padding: 0.65rem 0.9rem;
  border: 1px solid #b9cbd5;
  border-radius: 4px;
  font-size: 0.85rem;
  font-weight: 700;
  text-decoration: none;
}

.hero-actions .primary {
  color: var(--white);
  border-color: var(--ink);
  background: var(--ink);
}

.notice {
  max-width: 800px;
  margin: 2rem 0 0;
  padding: 0.8rem 1rem;
  border-left: 3px solid #78a9bf;
  color: var(--muted);
  background: var(--pale);
  font-size: 0.87rem;
}

.docs-layout {
  display: grid;
  grid-template-columns: 190px minmax(0, 820px);
  gap: clamp(2rem, 6vw, 5rem);
  max-width: 1160px;
  margin: 0 auto;
  padding: 3.5rem 1.25rem 6rem;
}

aside {
  position: sticky;
  top: 5rem;
  align-self: start;
  display: grid;
  gap: 0.45rem;
  padding-left: 1rem;
  border-left: 1px solid var(--line);
}

aside p {
  margin: 0 0 0.25rem;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

aside a {
  color: var(--muted);
  font-size: 0.82rem;
  text-decoration: none;
}

.docs-content section {
  scroll-margin-top: 6rem;
  padding-bottom: 3.5rem;
}

.docs-content section + section {
  padding-top: 3.5rem;
  border-top: 1px solid var(--line);
}

.docs-content h2 {
  margin: 0.35rem 0 1rem;
  font-size: clamp(1.5rem, 3vw, 2rem);
}

.docs-content h3 {
  margin: 1.7rem 0 0.5rem;
  font-size: 1rem;
}

.docs-content p {
  color: #435762;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.8rem;
}

.feature-grid article {
  padding: 1.2rem;
  border: 1px solid var(--line);
  border-radius: 5px;
  background: var(--white);
}

.feature-grid h3,
.feature-grid p {
  margin: 0;
}

.feature-grid p {
  margin-top: 0.4rem;
  font-size: 0.88rem;
}

pre {
  overflow-x: auto;
  padding: 1rem;
  border: 1px solid #253946;
  border-radius: 5px;
  color: #edf5f8;
  background: #1e303c;
}

code {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.88em;
}

.callout {
  margin-top: 1.3rem;
  padding: 1rem;
  border: 1px solid #cbdde5;
  border-radius: 5px;
  color: #405762;
  background: #f1f7f9;
  font-size: 0.9rem;
}

.steps {
  display: grid;
  gap: 0;
  margin: 1.5rem 0 0;
  padding: 0;
  list-style: none;
}

.steps li {
  display: grid;
  grid-template-columns: 45px 1fr;
  gap: 1rem;
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--line);
}

.steps li > span {
  color: #7397a9;
  font-size: 0.75rem;
  font-weight: 700;
}

.steps p {
  margin: 0.2rem 0 0;
}

.file-list {
  border-top: 1px solid var(--line);
}

.file-list div {
  display: grid;
  grid-template-columns: minmax(180px, 0.7fr) 1.5fr;
  gap: 1rem;
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.9rem;
}

.file-list code {
  color: var(--ink);
  font-weight: 700;
}

footer {
  display: flex;
  justify-content: space-between;
  max-width: 1160px;
  margin: 0 auto;
  padding: 1.5rem 1.25rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.8rem;
}

@media (max-width: 760px) {
  .docs-header {
    position: static;
    align-items: flex-start;
    flex-direction: column;
    gap: 0.5rem;
  }

  .docs-header nav a:not(:last-child) {
    display: none;
  }

  .docs-hero {
    margin: 1rem 0.8rem 0;
  }

  .docs-layout {
    display: block;
  }

  aside {
    display: none;
  }

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

  .file-list div {
    grid-template-columns: 1fr;
    gap: 0.2rem;
  }
}