/* Desi Maap: indigo and turmeric on warm paper. System fonts only. Mobile first. */
:root {
  --ink: #1b2836;
  --muted: #4e5a68;
  --indigo: #24457a;
  --indigo-dark: #183259;
  --turmeric: #e8b23a;
  --turmeric-soft: #fff4d9;
  --paper: #fbf7ef;
  --card: #ffffff;
  --line: #e2d7c4;
  --warn-bg: #fdecea;
  --warn-ink: #7a1f12;
  --radius: 12px;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans", "Helvetica Neue", Arial, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font);
  font-size: 1.0625rem;
  line-height: 1.6;
  overflow-wrap: break-word;
}
img, svg { max-width: 100%; }

.wrap { width: 100%; max-width: 62rem; margin: 0 auto; padding: 0 16px; }
main.wrap { padding-top: 1.25rem; padding-bottom: 2.5rem; }

a { color: var(--indigo); text-underline-offset: 0.15em; }
a:hover { color: var(--indigo-dark); }
:focus-visible { outline: 3px solid var(--indigo); outline-offset: 2px; border-radius: 4px; }
/* On the dark footer an indigo ring is nearly invisible (1.35:1); turmeric is 6.6:1. */
.site-footer :focus-visible { outline-color: var(--turmeric); }

.skip-link { position: absolute; left: -999px; top: 0; background: var(--card); padding: 0.75rem 1rem; z-index: 10; }
.skip-link:focus { left: 16px; }
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

h1, h2, h3 { line-height: 1.25; color: var(--ink); }
h1 { font-size: clamp(1.6rem, 5vw, 2.3rem); margin: 0.5rem 0 0.75rem; letter-spacing: -0.01em; }
h2 { font-size: clamp(1.25rem, 3.5vw, 1.55rem); margin: 2.25rem 0 0.6rem; }
h3 { font-size: 1.1rem; margin: 1.25rem 0 0.4rem; }
.lead { font-size: 1.125rem; color: var(--muted); max-width: 46rem; }

/* Header */
.site-header { background: var(--card); border-bottom: 3px solid var(--turmeric); }
.header-inner { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 0.5rem 1rem; padding-top: 0.6rem; padding-bottom: 0.6rem; }
.brand { display: flex; align-items: center; gap: 0.6rem; text-decoration: none; color: var(--ink); min-height: 44px; }
.brand-text { display: flex; flex-direction: column; line-height: 1.2; }
.brand-name { font-weight: 800; font-size: 1.2rem; color: var(--indigo); }
.brand-tag { font-size: 0.8rem; color: var(--muted); }
.nav { list-style: none; display: flex; flex-wrap: wrap; gap: 0.25rem; margin: 0; padding: 0; }
.nav a { display: inline-flex; align-items: center; min-height: 44px; padding: 0 0.7rem; border-radius: 999px; text-decoration: none; font-weight: 600; color: var(--ink); }
.nav a:hover { background: var(--turmeric-soft); }
.nav a[aria-current="page"] { background: var(--indigo); color: #fff; }

/* Converters */
.hero { padding-top: 0.25rem; }
.converter, .custom-units {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1rem;
  margin: 1rem 0;
  box-shadow: 0 1px 0 rgba(27, 40, 54, 0.04);
}
.custom-units legend { font-weight: 700; padding: 0 0.25rem; }
.field-row { display: flex; flex-wrap: wrap; gap: 0 0.9rem; }
.field-row > .field { flex: 1 1 8.5rem; min-width: 0; }
.field { display: flex; flex-direction: column; margin-bottom: 0.75rem; }
.field label { font-weight: 650; margin-bottom: 0.25rem; }
input[type="text"], select {
  font: inherit;
  min-height: 48px;
  width: 100%;
  padding: 0.55rem 0.7rem;
  border: 2px solid #857860; /* 4.3:1 on white, so the control boundary meets WCAG 1.4.11 */
  border-radius: 10px;
  background: #fff;
  color: var(--ink);
}
input[type="text"]:focus, select:focus { border-color: var(--indigo); }
input[aria-invalid="true"] { border-color: var(--warn-ink); }
.check { display: flex; align-items: center; gap: 0.6rem; min-height: 44px; }
.check input { width: 24px; height: 24px; margin: 0; accent-color: var(--indigo); }
.help { font-size: 0.92rem; color: var(--muted); margin: 0.25rem 0 0.75rem; }
.result {
  display: block;
  background: var(--turmeric-soft);
  border-left: 5px solid var(--turmeric);
  border-radius: 8px;
  padding: 0.8rem 1rem;
  margin-top: 0.25rem;
  min-height: 3rem;
}
.result:empty { display: none; }
.result-main { display: block; font-size: 1.3rem; font-weight: 750; }
.result-list { list-style: none; margin: 0.4rem 0 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(13rem, 1fr)); gap: 0.25rem 1rem; }
.result-list li { padding: 0.2rem 0; border-bottom: 1px dashed var(--line); }
.result-list b { font-variant-numeric: tabular-nums; }
.result .error { color: var(--warn-ink); font-weight: 650; }
.basis { font-size: 0.92rem; color: var(--muted); margin: 0.6rem 0 0; }
.basis:empty { display: none; }
.unit-note { font-size: 0.92rem; font-weight: 650; color: var(--ink); margin: 0.5rem 0 0; }
.unit-note:empty { display: none; }
.more { font-weight: 650; }
.noscript { background: var(--warn-bg); color: var(--warn-ink); padding: 0.6rem 0.8rem; border-radius: 8px; }
.state-info { background: #f2f5fa; border-radius: 8px; padding: 0.6rem 0.9rem; margin-bottom: 0.75rem; }
.state-info p { margin: 0.3rem 0; }

.button {
  font: inherit; font-weight: 700; min-height: 48px; padding: 0 1.2rem; border: 0; border-radius: 10px;
  background: var(--indigo); color: #fff; cursor: pointer;
}
.button:hover { background: var(--indigo-dark); }

/* Cards */
.cards { list-style: none; padding: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr)); gap: 0.9rem; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 1rem; }
.card h3 { margin-top: 0.4rem; }
.card h3 a { text-decoration: none; display: inline-flex; align-items: center; min-height: 44px; }
.card h3 a::after { content: " →"; }
.card p { margin: 0.25rem 0 0; color: var(--muted); }
.card-icon { width: 40px; height: 40px; color: var(--indigo); }

/* Tables */
.table-wrap { overflow-x: auto; margin: 0.75rem 0; border: 1px solid var(--line); border-radius: var(--radius); background: var(--card); }
.data-table { border-collapse: collapse; width: 100%; font-size: 0.95rem; }
.data-table caption { text-align: left; padding: 0.7rem 0.8rem; font-weight: 650; color: var(--muted); }
.data-table th, .data-table td { padding: 0.5rem 0.8rem; border-top: 1px solid var(--line); text-align: left; vertical-align: top; }
.data-table thead th { background: #f4efe4; }
.data-table td { font-variant-numeric: tabular-nums; }
.group-row th { background: #eef2f8; color: var(--indigo-dark); }
.derived { color: var(--muted); }

/* Notes */
.review-line { font-size: 0.92rem; color: var(--muted); }
.review-due { background: var(--warn-bg); color: var(--warn-ink); padding: 0.6rem 0.8rem; border-radius: 8px; font-weight: 650; }
.cite { color: var(--muted); font-size: 0.92rem; }
.limits { background: #f2f5fa; border-left: 5px solid var(--indigo); border-radius: 8px; padding: 0.2rem 1rem; margin: 2rem 0 1rem; }
.sources { border-top: 1px solid var(--line); margin-top: 2rem; }
.sources ul { padding-left: 1.2rem; }
.sources li { margin-bottom: 0.5rem; font-size: 0.95rem; }
.match-list li { margin-bottom: 0.45rem; }
.inline-list { display: flex; flex-wrap: wrap; gap: 0.4rem; list-style: none; padding: 0; }
.inline-list li { background: var(--card); border: 1px solid var(--line); border-radius: 999px; padding: 0.15rem 0.7rem; }

/* Tools page */
.tool-card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 0.25rem 1rem 0.75rem; margin: 1rem 0; }
.shop-link { display: inline-flex; align-items: center; min-height: 48px; padding: 0.4rem 1rem; border-radius: 10px; background: var(--indigo); color: #fff; font-weight: 700; text-decoration: none; }
.shop-link:hover { background: var(--indigo-dark); color: #fff; }
.disclosure { font-size: 0.92rem; color: var(--muted); }
.disclosure-top { background: var(--turmeric-soft); border-radius: 8px; padding: 0.6rem 0.8rem; color: var(--ink); }

/* Footer */
.site-footer { background: var(--indigo-dark); color: #eef2f8; padding: 1.5rem 0 2rem; font-size: 0.95rem; }
.site-footer a { color: #fff; }
.footer-links { list-style: none; display: flex; flex-wrap: wrap; gap: 0.25rem 1rem; padding: 0; margin: 0 0 0.75rem; }
.footer-links a { display: inline-flex; align-items: center; min-height: 44px; }

@media (max-width: 40rem) {
  .brand-tag { display: none; }
  .brand img { width: 34px; height: 34px; }
  .header-inner { padding-top: 0.35rem; padding-bottom: 0.15rem; }
  .site-header nav { width: 100%; }
  .nav { flex-wrap: wrap; gap: 0; }
  .nav a { padding: 0 0.55rem; font-size: 0.97rem; white-space: nowrap; }
  .lead { font-size: 1.05rem; }
  .converter { padding: 0.85rem; }
}

@media (min-width: 48rem) {
  .converter, .custom-units { padding: 1.25rem 1.5rem; }
}

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