/* My Sales Tax Calculator — practical tax-desk / ledger desk aesthetic */
:root {
  --ink: #1a2332;
  --muted: #5c6b7a;
  --line: #d5dde6;
  --paper: #f4f1ea;
  --card: #ffffff;
  --teal: #0e5c57;
  --teal-deep: #0a4541;
  --teal-soft: #e4f2f0;
  --amber: #c27a22;
  --amber-hover: #a5661a;
  --amber-soft: #f8efdf;
  --ok: #1f6b4a;
  --ok-bg: #e8f4ee;
  --warn: #8a4b12;
  --danger: #9b2c2c;
  --radius: 8px;
  --shadow: 0 1px 2px rgba(26, 35, 50, 0.04), 0 10px 28px rgba(26, 35, 50, 0.07);
  --font: "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "Cascadia Code", "SF Mono", Menlo, Consolas, monospace;
  --header-h: 52px;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  color: var(--ink);
  background:
    radial-gradient(1200px 400px at 10% -10%, #e8f0ee 0, transparent 55%),
    linear-gradient(180deg, #ebe6dc 0, var(--paper) 220px);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; }
a { color: var(--teal); text-decoration: none; }
a:hover { color: var(--teal-deep); text-decoration: underline; text-underline-offset: 3px; }
.container { width: min(100% - 1.5rem, 1040px); margin-inline: auto; }
.skip { position: absolute; left: -9999px; }
.skip:focus { left: 1rem; top: 1rem; z-index: 100; background: #fff; padding: .5rem .75rem; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 40;
  background: rgba(255,255,255,.94);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
  box-shadow: 0 1px 0 rgba(14, 92, 87, .08);
}
.nav {
  display: flex; align-items: center; justify-content: space-between;
  gap: .75rem; min-height: var(--header-h); flex-wrap: wrap;
  padding: .35rem 0;
}
.brand {
  display: inline-flex; align-items: center; gap: .55rem;
  color: var(--ink); font-weight: 700; text-decoration: none; font-size: .98rem;
}
.brand:hover { text-decoration: none; color: var(--teal-deep); }
.brand-mark {
  display: grid; place-items: center;
  width: 1.85rem; height: 1.85rem; border-radius: 6px;
  background: var(--teal); color: #fff; font-size: .72rem; font-weight: 800;
  letter-spacing: .02em;
}
.nav-links {
  display: flex; gap: .85rem; list-style: none; margin: 0; padding: 0;
  flex-wrap: wrap; font-size: .92rem;
}
.nav-links a { color: var(--muted); font-weight: 600; text-decoration: none; }
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--teal); }

/* ATF hero + calc */
.hero {
  padding: .85rem 0 .35rem;
}
.hero h1 {
  margin: 0 0 .35rem;
  font-size: clamp(1.45rem, 3.4vw, 2rem);
  line-height: 1.2;
  letter-spacing: -.02em;
}
.lede {
  margin: 0 0 .85rem;
  color: var(--muted);
  font-size: .98rem;
  max-width: 46rem;
}

.calc-section { padding: 0 0 1.25rem; }
.calc-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: calc(var(--radius) + 2px);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.calc-grid {
  display: grid;
  grid-template-columns: 1.05fr .95fr;
}
@media (max-width: 860px) {
  .calc-grid { grid-template-columns: 1fr; }
}
.calc-inputs, .calc-results {
  padding: 1rem 1.1rem 1.15rem;
}
.calc-inputs { border-right: 1px solid var(--line); }
@media (max-width: 860px) {
  .calc-inputs { border-right: none; border-bottom: 1px solid var(--line); }
}
.calc-inputs h2, .calc-results h2 {
  margin: 0 0 .75rem;
  font-size: 1rem;
  letter-spacing: .01em;
}
.field { margin-bottom: .7rem; }
.field label {
  display: block; font-size: .82rem; font-weight: 700;
  color: var(--muted); margin-bottom: .28rem; letter-spacing: .02em;
}
.field .hint { display: block; font-size: .75rem; color: var(--muted); font-weight: 500; margin-top: .2rem; }
.row-2 {
  display: grid; grid-template-columns: 1fr 1fr; gap: .65rem;
}
@media (max-width: 520px) { .row-2 { grid-template-columns: 1fr; } }

input[type="text"], input[type="number"], select {
  width: 100%;
  border: 1px solid #c7d0da;
  border-radius: 6px;
  padding: .62rem .7rem;
  font: inherit;
  color: var(--ink);
  background: #fff;
  transition: border-color .15s, box-shadow .15s;
}
input:focus, select:focus {
  outline: none;
  border-color: var(--teal);
  box-shadow: 0 0 0 3px rgba(14, 92, 87, .15);
}
.input-money { position: relative; }
.input-money .prefix {
  position: absolute; left: .7rem; top: 50%; transform: translateY(-50%);
  color: var(--muted); font-weight: 700; pointer-events: none;
}
.input-money input { padding-left: 1.4rem; }

.btn-row { display: flex; flex-wrap: wrap; gap: .5rem; margin-top: .85rem; }
.btn {
  appearance: none; border: none; cursor: pointer;
  border-radius: 6px; font: inherit; font-weight: 700;
  padding: .68rem 1rem; transition: background .15s, transform .05s;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--amber); color: #fff; }
.btn-primary:hover { background: var(--amber-hover); }
.btn-ghost {
  background: var(--teal-soft); color: var(--teal-deep);
}
.btn-ghost:hover { background: #d5ebe8; }
.btn-sm { padding: .45rem .7rem; font-size: .88rem; }

.presets { display: flex; flex-wrap: wrap; gap: .35rem; margin: .15rem 0 .55rem; }
.chip {
  border: 1px solid var(--line); background: #fafbfc; color: var(--muted);
  border-radius: 999px; padding: .2rem .55rem; font-size: .78rem; font-weight: 650;
  cursor: pointer;
}
.chip:hover, .chip.is-on { border-color: var(--teal); color: var(--teal-deep); background: var(--teal-soft); }

.results-panel {
  background: linear-gradient(180deg, #fbfdfe, #f3f7f6);
  border-radius: 8px;
  border: 1px solid #dce6e4;
  padding: .85rem .9rem;
  min-height: 11rem;
}
.results-panel.is-empty .big-num { color: var(--muted); font-size: 1.15rem; }
.big-num {
  font-family: var(--mono);
  font-size: clamp(1.55rem, 4vw, 2rem);
  font-weight: 750;
  letter-spacing: -.03em;
  color: var(--teal-deep);
  margin: .15rem 0 .35rem;
}
.metric-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: .55rem; margin: .55rem 0;
}
.metric {
  background: #fff; border: 1px solid var(--line); border-radius: 6px; padding: .55rem .65rem;
}
.metric .k { font-size: .72rem; color: var(--muted); font-weight: 700; text-transform: uppercase; letter-spacing: .04em; }
.metric .v { font-family: var(--mono); font-size: 1.05rem; font-weight: 700; margin-top: .1rem; }
.breakdown {
  margin: .55rem 0 0; padding: 0; list-style: none;
  border-top: 1px dashed var(--line); padding-top: .5rem;
}
.breakdown li {
  display: flex; justify-content: space-between; gap: .75rem;
  font-size: .9rem; padding: .18rem 0;
}
.breakdown .amt { font-family: var(--mono); font-weight: 650; }
.source-line {
  margin-top: .65rem; font-size: .78rem; color: var(--muted); line-height: 1.45;
}
.disclaimer-box {
  margin-top: .7rem;
  padding: .55rem .65rem;
  background: var(--amber-soft);
  border-left: 3px solid var(--amber);
  border-radius: 0 6px 6px 0;
  font-size: .8rem;
  color: var(--warn);
}
.copy-toast {
  display: none; margin-top: .4rem; font-size: .8rem; color: var(--ok); font-weight: 650;
}
.copy-toast.show { display: block; }

/* Content */
.prose { padding: 1.1rem 0 2rem; }
.prose h2 { margin: 1.6rem 0 .55rem; font-size: 1.28rem; letter-spacing: -.01em; }
.prose h3 { margin: 1.15rem 0 .4rem; font-size: 1.05rem; }
.prose p, .prose li { color: #2a3644; }
.prose .first-line { font-size: 1.02rem; }
.rate-table-wrap { overflow-x: auto; margin: .8rem 0 1.2rem; border: 1px solid var(--line); border-radius: 8px; background: #fff; }
table.rates {
  width: 100%; border-collapse: collapse; font-size: .9rem; min-width: 520px;
}
table.rates th, table.rates td {
  padding: .55rem .7rem; text-align: left; border-bottom: 1px solid var(--line);
}
table.rates th { background: var(--teal-soft); color: var(--teal-deep); font-size: .78rem; text-transform: uppercase; letter-spacing: .04em; }
table.rates tr:last-child td { border-bottom: none; }
table.rates td.num { font-family: var(--mono); text-align: right; }

.faq details {
  background: #fff; border: 1px solid var(--line); border-radius: 8px;
  padding: .7rem .85rem; margin: .45rem 0;
}
.faq summary { cursor: pointer; font-weight: 700; }
.faq details p { margin: .45rem 0 0; color: var(--muted); }

.related {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: .55rem; margin: .8rem 0 0;
}
.related a {
  display: block; background: #fff; border: 1px solid var(--line); border-radius: 8px;
  padding: .7rem .8rem; color: var(--ink); text-decoration: none; font-weight: 650; font-size: .92rem;
}
.related a:hover { border-color: var(--teal); color: var(--teal-deep); background: var(--teal-soft); text-decoration: none; }
.related a span { display: block; font-weight: 500; color: var(--muted); font-size: .78rem; margin-top: .2rem; }

.page-hero { padding: 1.1rem 0 .4rem; }
.page-hero h1 { margin: 0 0 .4rem; font-size: clamp(1.4rem, 3vw, 1.85rem); }
.legal { max-width: 46rem; }

/* Footer */
.site-footer {
  border-top: 1px solid var(--line);
  background: #fff;
  padding: 1.4rem 0 2rem;
  margin-top: 1rem;
  color: var(--muted);
  font-size: .88rem;
}
.footer-grid {
  display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 1rem;
}
@media (max-width: 720px) { .footer-grid { grid-template-columns: 1fr; } }
.site-footer h3 { margin: 0 0 .45rem; font-size: .82rem; color: var(--ink); text-transform: uppercase; letter-spacing: .05em; }
.site-footer ul { list-style: none; margin: 0; padding: 0; }
.site-footer li { margin: .25rem 0; }
.footer-disclaimer {
  margin-top: 1rem; padding-top: .85rem; border-top: 1px dashed var(--line);
  font-size: .8rem; line-height: 1.5;
}

/* Compact ATF for phone first screen */
@media (max-width: 430px) {
  :root { --header-h: 46px; }
  .nav { min-height: 46px; }
  .nav-links { gap: .55rem; font-size: .82rem; }
  .hero { padding: .55rem 0 .2rem; }
  .hero h1 { font-size: 1.32rem; margin-bottom: .2rem; }
  .lede { font-size: .9rem; margin-bottom: .55rem; line-height: 1.45; }
  .calc-inputs, .calc-results { padding: .75rem .8rem .85rem; }
  .field { margin-bottom: .55rem; }
  input[type="text"], input[type="number"], select { padding: .55rem .6rem; }
  .btn { padding: .62rem .85rem; }
  .results-panel { min-height: 0; padding: .7rem .75rem; }
  .metric-grid { gap: .4rem; }
}

.visually-hidden {
  position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

/* Optional city/ZIP below CTA — collapsed by default on small screens */
.optional-loc {
  margin-top: .55rem;
  border: 1px dashed var(--line);
  border-radius: 6px;
  padding: .25rem .55rem .35rem;
  background: #fafbfc;
}
.optional-loc summary {
  cursor: pointer;
  font-size: .82rem;
  font-weight: 700;
  color: var(--muted);
  list-style: none;
  padding: .25rem 0;
}
.optional-loc summary::-webkit-details-marker { display: none; }
.optional-loc summary::before {
  content: "+ ";
  color: var(--teal);
  font-weight: 800;
}
.optional-loc[open] summary::before { content: "– "; }
.optional-loc .row-2 { margin-top: .35rem; }
.optional-loc .field { margin-bottom: .45rem; }

@media (max-width: 430px) {
  .hero { padding: .4rem 0 .1rem; }
  .hero h1 { font-size: 1.28rem; margin-bottom: .12rem; }
  .lede { font-size: .88rem; margin-bottom: .4rem; line-height: 1.4; }
  .calc-inputs, .calc-results { padding: .65rem .7rem .7rem; }
  .calc-inputs h2, .calc-results h2 { margin-bottom: .5rem; }
  .presets { margin: .05rem 0 .35rem; }
  .field { margin-bottom: .42rem; }
  .btn-row { margin-top: .55rem; }
  .optional-loc { margin-top: .4rem; }
}