/* ESPM JupyterHub docs. Berkeley palette, used sparingly:
   Berkeley Blue for headings and links, California Gold only as a thin rule. */
:root {
  --berkeley-blue: #003262;
  --california-gold: #fdb515;
  --founders-rock: #3b7ea1;
  --ink: #1f2933;
  --muted: #5f6b76;
  --rule: #e3e3e3;
  --page: #f4f4f2;
  --card: #ffffff;
  --code-bg: #f3f4f5;
  --note-bg: #f7f7f5;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

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

a { color: var(--berkeley-blue); text-underline-offset: 2px; }
a:hover { color: var(--founders-rock); }

:focus-visible { outline: 3px solid var(--berkeley-blue); outline-offset: 2px; }

.skip-link { position: absolute; left: -9999px; }
.skip-link:focus { left: 16px; top: 8px; background: var(--card); padding: 4px 8px; z-index: 10; }

/* Header */
.site-header {
  background: var(--card);
  border-top: 3px solid var(--california-gold);
  border-bottom: 1px solid var(--rule);
}
.site-header .inner {
  max-width: 880px;
  margin: 0 auto;
  padding: 14px 16px;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 24px;
}
.brand {
  font-weight: 700;
  color: var(--berkeley-blue);
  text-decoration: none;
  font-size: 1.05rem;
  margin-right: auto;
}
.brand span { font-weight: 400; color: var(--muted); }
.site-nav { display: flex; flex-wrap: wrap; gap: 4px 20px; }
.site-nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.95rem;
  padding: 2px 0;
  border-bottom: 2px solid transparent;
}
.site-nav a:hover { color: var(--berkeley-blue); }
.site-nav a[aria-current="page"] { color: var(--berkeley-blue); border-bottom-color: var(--berkeley-blue); }

/* Content card */
main {
  max-width: 880px;
  margin: 24px auto;
  padding: 0 16px;
}
.card {
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: 8px;
  padding: 32px 40px 40px;
}
@media (max-width: 600px) {
  .card { padding: 20px 18px 28px; }
}

h1, h2, h3 { color: var(--berkeley-blue); line-height: 1.3; }
h1 { font-size: 1.9rem; margin: 0 0 4px; font-weight: 700; }
h2 { font-size: 1.35rem; margin: 40px 0 8px; padding-top: 24px; border-top: 1px solid var(--rule); font-weight: 600; }
h3 { font-size: 1.08rem; margin: 28px 0 6px; font-weight: 600; }
.lead { color: var(--muted); font-size: 1.08rem; margin: 0 0 8px; }

p, ul, ol { margin: 0 0 14px; }
li { margin-bottom: 4px; }

code {
  font-family: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  font-size: 0.88em;
  background: var(--code-bg);
  padding: 1px 5px;
  border-radius: 4px;
  overflow-wrap: anywhere;
}
pre {
  background: var(--code-bg);
  border: 1px solid var(--rule);
  border-radius: 6px;
  padding: 12px 14px;
  overflow-x: auto;
  line-height: 1.5;
  margin: 0 0 16px;
}
pre code { background: none; padding: 0; font-size: 0.86rem; overflow-wrap: normal; }

kbd {
  font-family: inherit;
  font-size: 0.85em;
  border: 1px solid #cfd3d6;
  border-bottom-width: 2px;
  border-radius: 4px;
  padding: 0 5px;
  background: var(--card);
}

/* Neutral callout: a left rule, no fill color beyond a faint warm grey. */
.note {
  background: var(--note-bg);
  border-left: 3px solid var(--berkeley-blue);
  padding: 10px 16px;
  margin: 0 0 16px;
  border-radius: 0 6px 6px 0;
}
.note p:last-child, .note ul:last-child { margin-bottom: 0; }
.note strong:first-child { color: var(--berkeley-blue); }

table { border-collapse: collapse; width: 100%; margin: 0 0 16px; font-size: 0.95rem; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--rule); vertical-align: top; }
th { font-weight: 600; color: var(--muted); font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.03em; }
.table-wrap { overflow-x: auto; }

.toc { margin: 20px 0 24px; padding: 0; list-style: none; display: flex; flex-wrap: wrap; gap: 6px 18px; font-size: 0.95rem; }

.site-footer {
  max-width: 880px;
  margin: 0 auto 32px;
  padding: 0 16px;
  color: var(--muted);
  font-size: 0.85rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px;
}
.site-footer a { color: var(--muted); }