/* ReagentFlow user guide — static chrome */
:root {
  --bg: #f6f7f9;
  --surface: #ffffff;
  --ink: #0f172a;
  --muted: #475569;
  --line: #d8dee8;
  --accent: #0369a1;
  --accent-ink: #0c4a6e;
  --accent-soft: #e0f2fe;
  --warn-bg: #fffbeb;
  --warn-ink: #92400e;
  --warn-line: #f59e0b;
  --demo-bg: #f1f5f9;
  --demo-ink: #334155;
  --sidebar: 17.5rem;
  --header-h: 3.5rem;
  --focus: #0284c7;
  --radius: 0.65rem;
  --shadow: 0 1px 2px rgb(15 23 42 / 6%), 0 8px 24px rgb(15 23 42 / 6%);
  font-family: "Source Sans 3", "Segoe UI", system-ui, sans-serif;
}
*, *::before, *::after { box-sizing: border-box; }
html { color-scheme: light; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.55;
  min-height: 100vh;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--accent); }
a:hover { color: var(--accent-ink); }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; }
.skip {
  position: absolute;
  left: 0.75rem;
  top: -3rem;
  background: var(--ink);
  color: #fff;
  padding: 0.5rem 0.75rem;
  z-index: 100;
  border-radius: 0 0 0.4rem 0.4rem;
}
.skip:focus { top: 0; }
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  height: var(--header-h);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0 1rem;
  background: var(--ink);
  color: #f8fafc;
  border-bottom: 1px solid #1e293b;
}
.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: inherit;
  text-decoration: none;
  font-weight: 650;
  letter-spacing: -0.02em;
}
.brand img {
  width: 1.75rem;
  height: 1.75rem;
  border-radius: 0.35rem;
  background: #fff;
}
.brand-sub {
  font-weight: 500;
  font-size: 0.8rem;
  color: #94a3b8;
  margin-left: 0.15rem;
}
.nav-toggle {
  display: none;
  margin-left: auto;
  background: transparent;
  color: #e2e8f0;
  border: 1px solid #334155;
  border-radius: 0.4rem;
  padding: 0.35rem 0.65rem;
  font: inherit;
}
.layout {
  display: grid;
  grid-template-columns: var(--sidebar) 1fr;
  min-height: calc(100vh - var(--header-h));
}
.sidebar {
  background: var(--surface);
  border-right: 1px solid var(--line);
  padding: 1rem 0.85rem 2rem;
  position: sticky;
  top: var(--header-h);
  height: calc(100vh - var(--header-h));
  overflow: auto;
}
.sidebar label {
  display: block;
  font-size: 0.72rem;
  font-weight: 650;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  margin: 0 0.4rem 0.4rem;
}
#nav-filter {
  width: 100%;
  margin-bottom: 0.85rem;
  padding: 0.45rem 0.6rem;
  border: 1px solid var(--line);
  border-radius: 0.45rem;
  font: inherit;
  background: var(--bg);
}
.sidebar nav a {
  display: block;
  padding: 0.32rem 0.6rem;
  border-radius: 0.4rem;
  color: var(--ink);
  text-decoration: none;
  font-size: 0.95rem;
}
.sidebar nav a:hover { background: var(--accent-soft); }
.sidebar nav a[aria-current="page"] {
  background: var(--accent-soft);
  color: var(--accent-ink);
  font-weight: 650;
}
.sidebar .nav-section {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  margin: 0.9rem 0.6rem 0.25rem;
}
.sidebar .nav-hidden { display: none; }
.content { padding: 1.5rem 1.75rem 3rem; max-width: 54rem; }
.breadcrumb { font-size: 0.85rem; color: var(--muted); margin: 0 0 0.85rem; }
.breadcrumb ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem;
  margin: 0;
  padding: 0;
}
.breadcrumb li:not(:last-child)::after {
  content: "/";
  margin-left: 0.35rem;
  color: #94a3b8;
}
.breadcrumb a { color: var(--muted); text-decoration: none; }
.breadcrumb a:hover { text-decoration: underline; }
h1 { font-size: 2rem; letter-spacing: -0.03em; line-height: 1.15; margin: 0 0 0.6rem; }
h2 { font-size: 1.25rem; margin: 2rem 0 0.6rem; letter-spacing: -0.02em; }
h3 { font-size: 1.05rem; margin: 1.4rem 0 0.4rem; }
p, li { font-size: 1.02rem; }
.lead { font-size: 1.12rem; color: var(--muted); margin-top: 0; }
.meta { color: var(--muted); font-size: 0.9rem; margin: 0 0 1.25rem; }
.role-pill {
  display: inline-block;
  font-family: ui-monospace, "Cascadia Code", monospace;
  font-size: 0.78rem;
  background: var(--accent-soft);
  color: var(--accent-ink);
  padding: 0.12rem 0.45rem;
  border-radius: 999px;
  font-weight: 650;
}
.callout {
  border: 1px solid var(--line);
  background: var(--demo-bg);
  color: var(--demo-ink);
  border-radius: var(--radius);
  padding: 0.85rem 1rem;
  margin: 1rem 0;
}
.callout.shot-needed {
  background: var(--warn-bg);
  border-color: var(--warn-line);
  color: var(--warn-ink);
}
.callout.warning {
  background: #fef2f2;
  border-color: #f87171;
  color: #9f1239;
}
figure {
  margin: 1.25rem 0;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}
figure img { width: 100%; background: #0b1220; }
figure.todo-screenshot {
  background: var(--warn-bg);
  border: 2px dashed var(--warn-line);
  box-shadow: none;
  color: var(--warn-ink);
  padding: 0.9rem 1rem;
}
figure.todo-screenshot p { margin: 0; font-weight: 600; }
figcaption {
  padding: 0.7rem 0.9rem 0.85rem;
  font-size: 0.9rem;
  color: var(--muted);
}
ol.steps { padding-left: 1.3rem; }
ol.steps > li { margin: 0.55rem 0; }
.topic-list {
  display: grid;
  gap: 0.75rem;
  margin: 1rem 0 0;
  padding: 0;
  list-style: none;
}
.topic-list a {
  display: block;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0.85rem 1rem;
  text-decoration: none;
  color: inherit;
  box-shadow: var(--shadow);
}
.topic-list a:hover { border-color: var(--accent); }
.topic-list strong { display: block; color: var(--accent-ink); margin-bottom: 0.2rem; }
.topic-list span { color: var(--muted); font-size: 0.92rem; }
table {
  width: 100%;
  border-collapse: collapse;
  background: var(--surface);
  border: 1px solid var(--line);
  font-size: 0.95rem;
}
th, td {
  text-align: left;
  padding: 0.55rem 0.75rem;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
th {
  background: #f1f5f9;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
}
code {
  font-family: ui-monospace, "Cascadia Code", monospace;
  font-size: 0.88em;
  background: #e2e8f0;
  padding: 0.05rem 0.3rem;
  border-radius: 0.25rem;
}
.prevnext {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 2.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
}
.prevnext a { text-decoration: none; max-width: 48%; }
.prevnext .dir {
  display: block;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
}
.prevnext .next { text-align: right; margin-left: auto; }
.page-footer { margin-top: 2.5rem; color: var(--muted); font-size: 0.85rem; }
.role-grid { display: grid; gap: 0.75rem; }
@media (min-width: 40rem) { .role-grid { grid-template-columns: 1fr 1fr; } }
.role-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0.9rem 1rem;
}
.role-card h3 { margin-top: 0; }
@media (max-width: 52rem) {
  .nav-toggle { display: inline-flex; }
  .layout { grid-template-columns: 1fr; }
  .sidebar {
    position: fixed;
    z-index: 30;
    left: 0;
    width: min(20rem, 92vw);
    transform: translateX(-110%);
    transition: transform 0.2s ease;
    box-shadow: var(--shadow);
  }
  .sidebar.open { transform: translateX(0); }
  .content { padding: 1.15rem 1rem 2.5rem; }
}
@media print {
  .skip, .nav-toggle, .sidebar, .prevnext, .site-header { display: none !important; }
  .layout { display: block; }
  .content { max-width: none; padding: 0; }
  a { color: inherit; text-decoration: none; }
  figure { box-shadow: none; break-inside: avoid; }
}