/* mudtoolbox: a utility-district field kit. Survey-ledger neutrals tinted toward slate blue,
   one water-blue accent, signage-style condensed headings, plain sans body, mono for figures. */
:root {
  --bg: #f4f6f8;
  --surface: #ffffff;
  --ink: #18212b;
  --muted: #5a6876;
  --rule: #d5dce3;
  --accent: #1f6fb2;
  --accent-ink: #ffffff;
  --warn-bg: #fff4d6;
  --font-display: "Barlow Semi Condensed", "Arial Narrow", system-ui, sans-serif;
  --font-body: "Source Sans 3", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, Menlo, Consolas, monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #111821; --surface: #18222d; --ink: #e6ecf2; --muted: #9aa8b6; --rule: #2c3a48;
    --accent: #5aa9e6; --accent-ink: #0c1620; --warn-bg: #3a3220; color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #111821; --surface: #18222d; --ink: #e6ecf2; --muted: #9aa8b6; --rule: #2c3a48;
  --accent: #5aa9e6; --accent-ink: #0c1620; --warn-bg: #3a3220; color-scheme: dark;
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body { background: var(--bg); color: var(--ink); font: 16px/1.55 var(--font-body); }
a { color: var(--accent); }
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
h1, h2, h3 { font-family: var(--font-display); line-height: 1.15; text-wrap: balance; margin: 0; }
h1 { font-size: 2rem; font-weight: 700; }
h2 { font-size: 1.35rem; font-weight: 600; }
.wrap { max-width: 960px; margin: 0 auto; padding-block: 24px 40px; padding-left: max(16px, env(safe-area-inset-left, 0px)); padding-right: max(16px, env(safe-area-inset-right, 0px)); display: grid; gap: 24px; }
.topbar { background: var(--surface); border-bottom: 1px solid var(--rule); }
.topbar .in { max-width: 960px; margin: 0 auto; padding-block: 10px; padding-left: max(16px, env(safe-area-inset-left, 0px)); padding-right: max(16px, env(safe-area-inset-right, 0px)); display: flex; gap: 16px; align-items: baseline; flex-wrap: wrap; }
.brand { font-family: var(--font-display); font-weight: 700; font-size: 1.15rem; letter-spacing: 0.02em; color: var(--ink); text-decoration: none; }
.crumbs { color: var(--muted); font-size: 0.95rem; }
.crumbs a { color: var(--muted); }
.eyebrow { font: 600 0.75rem/1 var(--font-body); text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); }
.lede { max-width: 65ch; color: var(--muted); margin: 0; }
.tools { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; }
.tool { background: var(--surface); border: 1px solid var(--rule); border-radius: 6px; padding: 16px; display: grid; gap: 6px; text-decoration: none; color: var(--ink); }
.tool:hover { border-color: var(--accent); }
.tool .tag { font: 500 0.75rem var(--font-mono); color: var(--muted); }
.tool.soon { opacity: 0.65; }
.prose { max-width: 65ch; display: grid; gap: 12px; }
.prose p, .prose ul { margin: 0; }
footer.site { border-top: 1px solid var(--rule); color: var(--muted); font-size: 0.9rem; }
footer.site .in { max-width: 960px; margin: 0 auto; padding-block: 16px 24px; padding-left: max(16px, env(safe-area-inset-left, 0px)); padding-right: max(16px, env(safe-area-inset-right, 0px)); display: grid; gap: 4px; }
@media (prefers-reduced-motion: reduce) { * { transition: none !important; animation: none !important; } }
.prose h2 { margin-top: 12px; font-size: 1.4rem; }
.prose ul { padding-left: 1.2em; display: grid; gap: 6px; }
.muted { color: var(--muted); }
footer.site a { color: var(--muted); }