:root {
  --manual-bg: #f4efe6;
  --manual-paper: #fffdf8;
  --manual-ink: #1f2329;
  --manual-muted: #5a6472;
  --manual-accent: #c04d2f;
  --manual-accent-soft: #f6dfd5;
  --manual-border: #e3d7c8;
  --manual-shadow: rgba(31, 35, 41, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  font-size: 16px;
}

body {
  margin: 0;
  font-family:
    "IBM Plex Sans",
    "Segoe UI",
    sans-serif;
  color: var(--manual-ink);
  background:
    radial-gradient(circle at top left, rgba(192, 77, 47, 0.1), transparent 32%),
    linear-gradient(180deg, #f8f3ea 0%, var(--manual-bg) 100%);
}

a {
  color: var(--manual-accent);
}

.manual-shell {
  max-width: 1080px;
  margin: 0 auto;
  padding: 2.5rem 1.25rem 4rem;
}

.manual-home-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  margin-bottom: 1rem;
  color: var(--manual-muted);
  text-decoration: none;
}

.manual-card {
  background: var(--manual-paper);
  border: 1px solid var(--manual-border);
  border-radius: 24px;
  box-shadow: 0 20px 60px var(--manual-shadow);
  overflow: hidden;
}

.manual-header {
  padding: 2rem 2rem 1.5rem;
  border-bottom: 1px solid var(--manual-border);
  background:
    linear-gradient(135deg, rgba(192, 77, 47, 0.09), transparent 55%),
    linear-gradient(180deg, #fffaf2 0%, #fffdf8 100%);
}

.manual-eyebrow {
  margin: 0 0 0.75rem;
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--manual-accent);
}

.manual-header h1 {
  margin: 0;
  font-family:
    "IBM Plex Serif",
    "Georgia",
    serif;
  font-size: clamp(2rem, 5vw, 3.2rem);
  line-height: 1.05;
}

.manual-body {
  padding: 2rem;
}

.manual-body h2 {
  margin-top: 2.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--manual-border);
  font-family:
    "IBM Plex Serif",
    "Georgia",
    serif;
  font-size: 1.65rem;
}

.manual-body h2:first-child {
  margin-top: 0;
  padding-top: 0;
  border-top: 0;
}

.manual-body p,
.manual-body li {
  line-height: 1.7;
}

.manual-body ol,
.manual-body ul {
  padding-left: 1.35rem;
}

.manual-figure {
  width: fit-content;
  max-width: 100%;
  margin: 1.5rem auto 2rem;
  padding: 0.9rem;
  border: 1px solid var(--manual-border);
  border-radius: 18px;
  background: linear-gradient(180deg, #fffefb 0%, #fff7ef 100%);
}

.manual-figure img {
  display: block;
  width: auto;
  max-width: 100%;
  height: auto;
  border-radius: 12px;
  border: 1px solid rgba(31, 35, 41, 0.08);
  box-shadow: 0 12px 30px rgba(31, 35, 41, 0.08);
}

.manual-figure figcaption {
  margin-top: 0.75rem;
  color: var(--manual-muted);
  font-size: 0.95rem;
}

.manual-index-list {
  display: grid;
  gap: 1rem;
  padding: 2rem;
}

.manual-index-link {
  display: block;
  padding: 1.25rem;
  border: 1px solid var(--manual-border);
  border-radius: 18px;
  background: var(--manual-paper);
  color: inherit;
  text-decoration: none;
  box-shadow: 0 14px 32px var(--manual-shadow);
}

.manual-index-link strong {
  display: block;
  margin-bottom: 0.35rem;
  font-size: 1.1rem;
}

.manual-index-link span {
  color: var(--manual-muted);
}

@media (max-width: 720px) {
  .manual-shell {
    padding: 1rem 0.75rem 2rem;
  }

  .manual-header,
  .manual-body,
  .manual-index-list {
    padding: 1.25rem;
  }
}