/* Untangle Your Data - site styles. Bump ?v= in the HTML when this file changes. */
:root {
  --ink: #16324F;
  --text: #1F2D3A;
  --muted: #4A5B6A;
  --ledger: #1E7A4C;
  --ledger-strong: #155E3A;
  --grid: #DDE7E1;
  --paper: #FFFFFF;
  --surface: #F2F6F4;
  --mark: #FFD23F;
  --serif: Charter, "Bitstream Charter", "Sitka Text", Cambria, Georgia, serif;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --measure: 68ch;
  --wide: 72rem;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --ink: #E8F0F4;
    --text: #D6E1E8;
    --muted: #9FB2C1;
    --ledger: #5CCB94;
    --ledger-strong: #8FE0B6;
    --grid: #22394C;
    --paper: #102233;
    --surface: #15293B;
    --mark: #F2C230;
  }
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-padding-top: 1rem; }
body {
  margin: 0;
  font-family: var(--sans);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--text);
  background: var(--paper);
}
img, svg { max-width: 100%; height: auto; }
a { color: var(--ledger); text-underline-offset: 0.18em; text-decoration-thickness: 1px; }
a:hover { color: var(--ledger-strong); text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid var(--mark); outline-offset: 2px; }

h1, h2, h3 { font-family: var(--serif); color: var(--ink); line-height: 1.2; font-weight: 700; }
h1 { font-size: clamp(2.1rem, 1.4rem + 3vw, 3.4rem); margin: 0 0 1rem; letter-spacing: -0.01em; }
h2 { font-size: clamp(1.5rem, 1.2rem + 1.2vw, 2rem); margin: 2.75rem 0 0.75rem; }
h3 { font-size: 1.25rem; margin: 1.9rem 0 0.4rem; }
p, ul, ol { margin: 0 0 1rem; }
ul, ol { padding-left: 1.3rem; }
li { margin-bottom: 0.35rem; }

.skip-link { position: absolute; left: -999px; top: 0; background: var(--mark); color: #16324F; padding: 0.5rem 1rem; z-index: 10; }
.skip-link:focus { left: 1rem; }

.wrap { width: min(100% - 2.5rem, var(--wide)); margin-inline: auto; }
.prose { max-width: var(--measure); }
.wrap.prose { max-width: none; }
.wrap.prose > * { max-width: var(--measure); }
.lede { font-size: 1.2rem; color: var(--muted); max-width: 60ch; }

/* Header */
.site-header { border-bottom: 1px solid var(--grid); background: var(--paper); }
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; gap: 1rem; min-height: 4rem; }
.brand { display: flex; align-items: center; gap: 0.6rem; font-family: var(--serif); font-weight: 700; font-size: 1.15rem; color: var(--ink); text-decoration: none; }
.brand:hover { color: var(--ink); }
.brand svg { width: 28px; height: 28px; flex: none; }
.nav-toggle { display: none; font: inherit; font-size: 0.95rem; background: none; border: 1px solid var(--grid); color: var(--ink); padding: 0.4rem 0.8rem; border-radius: 4px; cursor: pointer; }
.site-nav ul { list-style: none; margin: 0; padding: 0; display: flex; gap: 0.25rem; flex-wrap: wrap; }
.site-nav li { margin: 0; }
.site-nav a { display: block; padding: 0.45rem 0.75rem; color: var(--ink); text-decoration: none; border: 2px solid transparent; }
.site-nav a:hover { border-color: var(--grid); }
.site-nav a[aria-current="page"] { border-color: var(--ledger); }
@media (max-width: 760px) {
  .js .nav-toggle { display: block; }
  .js .site-nav { display: none; width: 100%; padding-bottom: 0.75rem; }
  .js .site-nav.is-open { display: block; }
  .site-header .wrap { flex-wrap: wrap; }
  .site-nav ul { flex-direction: column; }
}

/* Hero: the one bold moment - a spreadsheet formula bar over a selected cell */
.hero {
  background-color: var(--paper);
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 112px 32px;
  border-bottom: 1px solid var(--grid);
  padding: 2.5rem 0 3.5rem;
}
.formula-bar {
  display: flex; align-items: stretch; max-width: 34rem;
  background: var(--paper); border: 1px solid var(--grid);
  font-family: Consolas, "SF Mono", Menlo, monospace; font-size: 0.95rem;
  margin-bottom: 1.75rem;
}
.formula-bar .name-box { padding: 0.35rem 0.8rem; border-right: 1px solid var(--grid); color: var(--muted); min-width: 4.5rem; }
.formula-bar .fx { padding: 0.35rem 0.6rem; border-right: 1px solid var(--grid); color: var(--muted); font-style: italic; }
.formula-bar .formula { padding: 0.35rem 0.8rem; color: var(--ink); overflow-wrap: anywhere; }
.selected-cell {
  position: relative; display: inline-block; max-width: 100%;
  background: var(--paper); border: 3px solid var(--ledger);
  padding: 1.25rem 1.5rem 1rem;
}
.selected-cell::after {
  content: ""; position: absolute; right: -7px; bottom: -7px;
  width: 11px; height: 11px; background: var(--ledger); border: 2px solid var(--paper);
}
.selected-cell h1 { margin: 0; }
.hero .lede { margin-top: 1.5rem; background: var(--paper); padding: 0.25rem 0; color: var(--text); }
.actions { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-top: 1.5rem; }
.button {
  display: inline-block; padding: 0.7rem 1.2rem; font-weight: 600; text-decoration: none;
  background: var(--ledger); color: #FFFFFF; border: 2px solid var(--ledger); border-radius: 3px;
}
.button:hover { background: var(--ledger-strong); border-color: var(--ledger-strong); color: #FFFFFF; }
@media (prefers-color-scheme: dark) { .button, .button:hover { color: #0D1C29; } }
.button.secondary { background: var(--paper); color: var(--ledger); }
.button.secondary:hover { color: var(--ledger-strong); background: var(--surface); }

/* Page header for inner pages */
.page-head { border-bottom: 1px solid var(--grid); padding: 1.5rem 0 2rem; }
.breadcrumb ol { list-style: none; padding: 0; margin: 0 0 1.25rem; display: flex; flex-wrap: wrap; gap: 0.4rem; font-size: 0.92rem; color: var(--muted); }
.breadcrumb li { margin: 0; }
.breadcrumb li + li::before { content: "/"; margin-right: 0.4rem; color: var(--grid); }

main { display: block; }
.section { padding: 1rem 0 2.5rem; }
.band { background: var(--surface); border-block: 1px solid var(--grid); padding: 2rem 0 2.5rem; margin-top: 2rem; }
.band h2 { margin-top: 0.5rem; }

/* Service rows: spreadsheet-like ruled rows rather than cards */
.service-rows { list-style: none; padding: 0; margin: 1.5rem 0 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 30rem), 1fr)); border-top: 1px solid var(--grid); }
.service-rows li { margin: 0; border-bottom: 1px solid var(--grid); }
.service-rows a { display: grid; grid-template-columns: 2.5rem 1fr; gap: 0.25rem 1rem; padding: 1.1rem 0.75rem; text-decoration: none; color: var(--text); border: 2px solid transparent; height: 100%; }
.service-rows a:hover { border-color: var(--ledger); color: var(--text); }
.service-rows svg { width: 2.2rem; height: 2.2rem; grid-row: span 2; color: var(--ledger); }
.service-rows .row-title { font-family: var(--serif); font-weight: 700; font-size: 1.15rem; color: var(--ink); }
.service-rows .row-text { color: var(--muted); font-size: 0.98rem; }
.group-title { margin-top: 2.5rem; }

/* Numbered steps: a real sequence */
.steps { counter-reset: step; list-style: none; padding: 0; display: grid; gap: 1.25rem; grid-template-columns: repeat(auto-fit, minmax(min(100%, 15rem), 1fr)); }
.steps li { counter-increment: step; margin: 0; padding-top: 0.75rem; border-top: 3px solid var(--ledger); }
.steps li::before { content: counter(step); font-family: var(--serif); font-size: 1.6rem; font-weight: 700; color: var(--ledger); display: block; }
.steps strong { display: block; color: var(--ink); margin-bottom: 0.25rem; }

/* Tools as a grid of cells */
.tool-cells { list-style: none; padding: 0; margin: 1rem 0 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(10.5rem, 1fr)); border-top: 1px solid var(--grid); border-left: 1px solid var(--grid); max-width: var(--measure); }
.tool-cells li { margin: 0; padding: 0.45rem 0.7rem; border-right: 1px solid var(--grid); border-bottom: 1px solid var(--grid); font-size: 0.95rem; }

.faq h3 { font-size: 1.15rem; }
.related { list-style: none; padding: 0; max-width: var(--measure); }
.related li { border-top: 1px solid var(--grid); padding: 0.75rem 0; margin: 0; }
.related a { font-weight: 600; }
.related span { display: block; color: var(--muted); font-size: 0.97rem; }

/* Portfolio */
.project { border-top: 3px solid var(--ledger); padding-top: 0.5rem; margin-top: 2.5rem; max-width: var(--measure); }
.project h2 { margin-top: 0.5rem; }
.project dl { display: grid; grid-template-columns: 7rem 1fr; gap: 0.5rem 1rem; margin: 1rem 0; }
.project dt { font-weight: 600; color: var(--ink); }
.project dd { margin: 0; }
@media (max-width: 520px) { .project dl { grid-template-columns: 1fr; } .project dd { margin-bottom: 0.5rem; } }

/* Contact form */
.contact-layout { display: grid; gap: 2.5rem; grid-template-columns: repeat(auto-fit, minmax(min(100%, 22rem), 1fr)); align-items: start; }
.form-field { margin-bottom: 1.1rem; }
label { display: block; font-weight: 600; color: var(--ink); margin-bottom: 0.3rem; }
input, select, textarea {
  width: 100%; font: inherit; color: var(--text); background: var(--paper);
  border: 1px solid #9DB3A8; border-radius: 3px; padding: 0.6rem 0.7rem;
}
textarea { min-height: 10rem; resize: vertical; }
input:focus, select:focus, textarea:focus { outline: 3px solid var(--mark); outline-offset: 0; border-color: var(--ledger); }
button.button { font: inherit; font-weight: 600; cursor: pointer; }
.hp { position: absolute; left: -10000px; width: 1px; height: 1px; overflow: hidden; }
.form-error { border-left: 4px solid #B3261E; background: var(--surface); padding: 0.75rem 1rem; margin-bottom: 1.25rem; }
.form-error[hidden] { display: none; }
.contact-list { list-style: none; padding: 0; }
.contact-list li { padding: 0.6rem 0; border-top: 1px solid var(--grid); margin: 0; }
.hint { color: var(--muted); font-size: 0.93rem; }

/* Footer */
.site-footer { border-top: 1px solid var(--grid); background: var(--surface); margin-top: 3rem; padding: 2.5rem 0 1.5rem; font-size: 0.95rem; }
.footer-cols { display: grid; gap: 2rem; grid-template-columns: repeat(auto-fit, minmax(min(100%, 14rem), 1fr)); }
.site-footer h2 { font-size: 1.05rem; margin: 0 0 0.6rem; }
.site-footer ul { list-style: none; padding: 0; margin: 0; }
.site-footer li { margin-bottom: 0.3rem; }
.site-footer .legal { margin-top: 2rem; color: var(--muted); }

@media (prefers-reduced-motion: reduce) { * { scroll-behavior: auto !important; transition: none !important; } }