/* CommonKeel v1 — static site stylesheet
   Mobile-first, system fonts, WCAG AA contrast targets.
   Body text #1c2733 on #ffffff (~14.5:1). Links #0b5394 (~7.2:1). */

:root {
  --ink: #1c2733;
  --ink-soft: #43525f;
  --link: #0b5394;
  --link-hover: #073763;
  --accent: #14532d;
  --bg: #ffffff;
  --bg-alt: #f4f6f8;
  --bg-note: #eef4fb;
  --bg-warn: #fdf3e3;
  --border: #d5dce2;
  --border-strong: #9fadb9;
  --footer-bg: #16222e;
  --footer-ink: #d7dee6;
  --max: 1080px;
  --prose: 50rem;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--ink);
  background: var(--bg);
}

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 1rem; }

.skip-link {
  position: absolute; left: -999px; top: 0;
  background: var(--ink); color: #fff; padding: .5rem 1rem; z-index: 100;
}
.skip-link:focus { left: 0; }

/* Header */
.site-header {
  border-bottom: 3px solid var(--ink);
  background: var(--bg);
  padding: .75rem 0;
}
.header-in { display: flex; flex-wrap: wrap; align-items: baseline; gap: .5rem 1.5rem; }
.brand {
  font-size: 1.35rem; font-weight: 700; text-decoration: none; color: var(--ink);
  letter-spacing: -0.01em;
}
.brand:hover { color: var(--link); }
.main-nav { display: flex; flex-wrap: wrap; gap: .25rem .35rem; }
.main-nav a {
  text-decoration: none; color: var(--ink-soft); font-weight: 600; font-size: .95rem;
  padding: .3rem .55rem; border-radius: 4px;
}
.main-nav a:hover, .main-nav a:focus { background: var(--bg-alt); color: var(--link-hover); }

/* Breadcrumbs */
.breadcrumbs { font-size: .875rem; margin: 1rem 0 0; color: var(--ink-soft); }
.breadcrumbs ol { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: .25rem; }
.breadcrumbs li + li::before { content: "\203A"; margin: 0 .35rem; color: var(--border-strong); }
.breadcrumbs a { color: var(--link); }

/* Main content */
main { display: block; }
article.prose, .prose { max-width: var(--prose); }
main .wrap > article { padding-bottom: 2.5rem; }

h1 { font-size: 1.9rem; line-height: 1.25; margin: 1.2rem 0 .5rem; letter-spacing: -0.01em; }
h2 { font-size: 1.45rem; line-height: 1.3; margin: 2.2rem 0 .6rem; border-bottom: 1px solid var(--border); padding-bottom: .25rem; }
h3 { font-size: 1.15rem; margin: 1.6rem 0 .4rem; }
h4 { font-size: 1rem; margin: 1.2rem 0 .3rem; }

a { color: var(--link); }
a:hover, a:focus { color: var(--link-hover); }

.updated {
  font-size: .875rem; color: var(--ink-soft); margin: .25rem 0 1.25rem;
}
.updated strong { color: var(--ink); }

ul, ol { padding-left: 1.4rem; }
li { margin: .25rem 0; }

/* Boxes */
.notice, .warn, .disclosure-box, .method-box {
  border: 1px solid var(--border-strong);
  border-left-width: 5px;
  border-radius: 4px;
  padding: .85rem 1rem;
  margin: 1.25rem 0;
  font-size: .95rem;
}
.notice { background: var(--bg-note); border-left-color: var(--link); }
.warn { background: var(--bg-warn); border-left-color: #a4660a; }
.disclosure-box { background: var(--bg-alt); border-left-color: var(--accent); }
.method-box { background: var(--bg-alt); border-left-color: var(--ink); }
.notice p:first-child, .warn p:first-child, .disclosure-box p:first-child, .method-box p:first-child { margin-top: 0; }
.notice p:last-child, .warn p:last-child, .disclosure-box p:last-child, .method-box p:last-child { margin-bottom: 0; }

/* Buttons */
.btn {
  display: inline-block; padding: .6rem 1.15rem; border-radius: 6px;
  font-weight: 700; text-decoration: none; border: 2px solid var(--link);
  color: var(--link); background: #fff; font-size: 1rem;
}
.btn:hover, .btn:focus { background: var(--bg-note); color: var(--link-hover); }
.btn-primary { background: var(--link); color: #fff; }
.btn-primary:hover, .btn-primary:focus { background: var(--link-hover); color: #fff; }

/* Cards */
.card-grid {
  display: grid; gap: 1rem; margin: 1.5rem 0;
  grid-template-columns: 1fr;
}
@media (min-width: 640px) { .card-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 960px) { .card-grid.cols-3 { grid-template-columns: repeat(3, 1fr); } }
.card {
  border: 1px solid var(--border); border-radius: 8px; padding: 1rem 1.1rem;
  background: var(--bg);
}
.card h3 { margin-top: 0; }
.card h3 a { text-decoration: none; }
.card h3 a:hover { text-decoration: underline; }
.card p { margin: .4rem 0 0; font-size: .95rem; color: var(--ink-soft); }

/* Tables */
.table-scroll { overflow-x: auto; margin: 1.25rem 0; border: 1px solid var(--border); border-radius: 6px; }
table { border-collapse: collapse; width: 100%; font-size: .92rem; }
caption { text-align: left; font-weight: 700; padding: .6rem .75rem; background: var(--bg-alt); border-bottom: 1px solid var(--border); }
th, td { border: 1px solid var(--border); padding: .5rem .65rem; text-align: left; vertical-align: top; }
thead th { background: var(--bg-alt); position: sticky; top: 0; }
tbody tr:nth-child(even) { background: #fafbfc; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }

.score-badge {
  display: inline-block; background: var(--accent); color: #fff; font-weight: 700;
  border-radius: 4px; padding: .05rem .45rem; font-size: .9rem;
}

/* Hero */
.hero { padding: 2rem 0 1rem; }
.hero h1 { font-size: 2.15rem; max-width: 46rem; }
.hero .lede { font-size: 1.2rem; color: var(--ink-soft); max-width: 44rem; }
.hero-ctas { display: flex; flex-wrap: wrap; gap: .75rem; margin: 1.25rem 0; }

/* Calculator */
.calc fieldset { border: 1px solid var(--border); border-radius: 6px; margin: 1rem 0; padding: .75rem 1rem; }
.calc legend { font-weight: 700; padding: 0 .35rem; }
.calc label { display: block; font-weight: 600; font-size: .9rem; margin-top: .5rem; }
.calc input[type="text"], .calc input[type="number"], .calc input[type="email"] {
  width: 100%; max-width: 16rem; padding: .45rem .55rem; font-size: 1rem;
  border: 1px solid var(--border-strong); border-radius: 4px;
}
.calc table input[type="text"], .calc table input[type="number"] { max-width: 100%; min-width: 5.5rem; }
.calc .row-actions button { font-size: .85rem; }
.calc button {
  font: inherit; font-weight: 700; padding: .55rem 1.1rem; border-radius: 6px;
  border: 2px solid var(--link); background: var(--link); color: #fff; cursor: pointer;
}
.calc button.secondary { background: #fff; color: var(--link); }
.calc button:hover { background: var(--link-hover); border-color: var(--link-hover); color: #fff; }
.calc .del-btn { background: #fff; color: #8a1c1c; border-color: #8a1c1c; padding: .25rem .6rem; }
.calc .del-btn:hover { background: #8a1c1c; color: #fff; }
#calc-results { margin-top: 1.5rem; }
.result-big { font-size: 1.35rem; font-weight: 700; }

/* Newsletter placeholder */
.newsletter form { display: flex; flex-wrap: wrap; gap: .5rem; margin-top: .5rem; }
.newsletter input[type="email"] {
  padding: .5rem .6rem; border-radius: 4px; border: 1px solid var(--border-strong);
  font-size: .95rem; flex: 1 1 12rem; max-width: 18rem;
}
.newsletter button {
  font: inherit; padding: .5rem .9rem; border-radius: 4px; border: 1px solid var(--border-strong);
  background: var(--bg-alt); color: var(--ink-soft); font-weight: 600;
}
.newsletter button[disabled], .newsletter input[disabled] { cursor: not-allowed; opacity: .75; }

/* FAQ */
.faq h3 { margin-top: 1.4rem; }

/* Footer */
.site-footer { background: var(--footer-bg); color: var(--footer-ink); margin-top: 3rem; padding: 2rem 0 1.5rem; font-size: .92rem; }
.site-footer a { color: #9ec5e8; }
.site-footer a:hover, .site-footer a:focus { color: #cfe3f5; }
.foot-grid { display: grid; gap: 1.5rem; grid-template-columns: 1fr; }
@media (min-width: 760px) { .foot-grid { grid-template-columns: 2fr 1fr 1fr 2fr; } }
.foot-brand { font-weight: 700; font-size: 1.1rem; margin: 0 0 .35rem; color: #fff; }
.foot-h { font-weight: 700; color: #fff; margin: 0 0 .4rem; }
.foot-note { font-size: .82rem; color: #a9b6c2; }
.site-footer ul { list-style: none; margin: 0; padding: 0; }
.site-footer li { margin: .2rem 0; }
.foot-legal { border-top: 1px solid #2c3a48; margin-top: 1.5rem; padding-top: 1rem; font-size: .82rem; color: #a9b6c2; }

/* Utility */
.small { font-size: .875rem; color: var(--ink-soft); }
.tag { display: inline-block; background: var(--bg-alt); border: 1px solid var(--border); border-radius: 999px; padding: .05rem .6rem; font-size: .8rem; font-weight: 600; color: var(--ink-soft); }
hr { border: 0; border-top: 1px solid var(--border); margin: 2rem 0; }
img { max-width: 100%; height: auto; }
code { background: var(--bg-alt); padding: .1rem .3rem; border-radius: 3px; font-size: .9em; }

@media print {
  .site-header, .site-footer, .breadcrumbs, .hero-ctas, .newsletter { display: none; }
}