/* Engine Tools — static, no tracking, system fonts only */
:root {
  --bg: #f3eee4;
  --bg-deep: #e7e0d2;
  --paper: #fffdf8;
  --ink: #1a2116;
  --ink-soft: #3d4538;
  --muted: #5e6658;
  --line: #d4ccbc;
  --line-strong: #b9b09e;
  --forest: #1f4d32;
  --forest-dark: #163826;
  --forest-pale: #e4efe6;
  --rust: #8a3418;
  --rust-dark: #6c2710;
  --rust-pale: #f6e7df;
  --gold: #c4a15a;
  --warn-bg: #f7edd4;
  --warn-ink: #5a3d0b;
  --ok: #1f4d32;
  --shadow: 0 1px 2px rgba(26, 33, 22, 0.06), 0 8px 24px rgba(26, 33, 22, 0.06);
  --radius: 14px;
  --serif: "Iowan Old Style", Palatino, "Palatino Linotype", "Book Antiqua", Georgia, serif;
  --sans: "Segoe UI", "Source Sans 3", system-ui, -apple-system, sans-serif;
  --mono: ui-monospace, "Cascadia Code", "SF Mono", Menlo, Consolas, monospace;
  --max: 1100px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background:
    radial-gradient(1200px 400px at 10% -10%, #efe6cf 0%, transparent 50%),
    var(--bg);
  color: var(--ink);
  font: 17px/1.55 var(--sans);
}

.skip {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--forest);
  color: #fff;
  padding: 0.5rem 1rem;
  z-index: 100;
}
.skip:focus { left: 0.5rem; top: 0.5rem; }

.wrap { width: min(var(--max), calc(100% - 2rem)); margin: 0 auto; }

.site-header {
  border-bottom: 1px solid var(--line);
  background: rgba(255, 253, 248, 0.92);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
  z-index: 20;
}
.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 4rem;
}
.logo {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--forest-dark);
  text-decoration: none;
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: 0.55rem;
}
.logo-mark {
  width: 1.7rem;
  height: 1.7rem;
  display: block;
}
.site-nav { display: flex; flex-wrap: wrap; gap: 0.15rem 1rem; align-items: center; }
.site-nav a {
  color: var(--ink-soft);
  text-decoration: none;
  font-size: 0.92rem;
  padding: 0.2rem 0;
  border-bottom: 2px solid transparent;
}
.site-nav a:hover, .site-nav a[aria-current="page"] {
  color: var(--forest);
  border-bottom-color: var(--gold);
}

main { padding: 2.2rem 0 3.5rem; }
h1, h2, h3, .serif { font-family: var(--serif); letter-spacing: -0.02em; }
h1 { font-size: clamp(1.8rem, 3.2vw, 2.45rem); line-height: 1.15; margin: 0 0 0.75rem; }
h2 { font-size: 1.45rem; margin: 2.2rem 0 0.7rem; }
h3 { font-size: 1.12rem; margin: 1.4rem 0 0.45rem; }
p { margin: 0 0 1rem; }
.lede { font-size: 1.15rem; color: var(--ink-soft); max-width: 44rem; }
.kicker {
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.72rem;
  font-weight: 650;
  color: var(--rust);
  margin: 0 0 0.45rem;
}

.hero {
  display: grid;
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.grid-2, .calc-layout, .card-grid { display: grid; gap: 1.25rem; }
@media (min-width: 860px) {
  .calc-layout { grid-template-columns: 1.15fr 0.85fr; align-items: start; }
  .grid-2 { grid-template-columns: 1fr 1fr; }
  .card-grid { grid-template-columns: 1fr 1fr; }
}

.card, .panel, .cta, .faq details, .howto {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.card { padding: 1.25rem 1.3rem 1.35rem; display: flex; flex-direction: column; gap: 0.4rem; }
.card h2 { margin: 0.2rem 0 0.3rem; font-size: 1.3rem; }
.card p { color: var(--ink-soft); flex: 1; }
.card a.btn { margin-top: 0.4rem; align-self: flex-start; }

.panel, .howto, .cta, .faq details { padding: 1.2rem 1.25rem 1.3rem; }
.panel h2, .howto h2, .cta h2 { margin-top: 0; }

.field { margin: 0 0 0.85rem; }
.field label, .field-label {
  display: block;
  font-size: 0.88rem;
  font-weight: 650;
  margin-bottom: 0.28rem;
}
.hint { display: block; color: var(--muted); font-size: 0.8rem; font-weight: 400; margin-top: 0.15rem; }
.row { display: grid; gap: 0.75rem; }
@media (min-width: 560px) {
  .row-2 { grid-template-columns: 1fr 1fr; }
  .row-3 { grid-template-columns: 1fr 1fr 1fr; }
}

input[type="number"], input[type="text"], select {
  width: 100%;
  font: 1rem var(--sans);
  color: var(--ink);
  background: #fff;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  padding: 0.55rem 0.7rem;
}
input:focus, select:focus, button:focus, a:focus-visible {
  outline: 3px solid #8fb89a;
  outline-offset: 1px;
}
fieldset {
  border: 1px solid var(--line);
  border-radius: 10px;
  margin: 0 0 1rem;
  padding: 0.8rem 0.9rem 0.4rem;
}
legend { font-weight: 700; font-size: 0.92rem; padding: 0 0.3rem; }

.results {
  position: sticky;
  top: 5rem;
  background: var(--forest-dark);
  color: #f4f7f2;
  border-radius: var(--radius);
  padding: 1.2rem 1.25rem 1.3rem;
  box-shadow: var(--shadow);
}
.results h2 { margin: 0 0 0.8rem; color: #fff; }
.metrics { display: grid; gap: 0.55rem; }
.metric {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  border-bottom: 1px solid rgba(255,255,255,0.12);
  padding: 0.4rem 0;
  font-size: 0.95rem;
}
.metric dt { color: #c9d6cc; }
.metric dd { margin: 0; font-variant-numeric: tabular-nums; font-weight: 650; font-family: var(--mono); font-size: 0.92rem; }
.metric.primary dd { font-size: 1.15rem; color: #f3d48a; }
.results .note { color: #c9d6cc; font-size: 0.82rem; margin: 0.8rem 0 0; }
.neg { color: #ffb4a1 !important; }

.btn, .btn-secondary {
  display: inline-block;
  text-decoration: none;
  border-radius: 999px;
  padding: 0.55rem 1rem;
  font-weight: 650;
  font-size: 0.95rem;
  border: 2px solid transparent;
}
.btn { background: var(--rust); color: #fff; }
.btn:hover { background: var(--rust-dark); }
.btn-secondary { background: transparent; color: var(--forest-dark); border-color: var(--forest); }
.btn-secondary:hover { background: var(--forest-pale); }
.cta { background: linear-gradient(180deg, #fffdf8, var(--rust-pale)); }
.cta .actions { display: flex; flex-wrap: wrap; gap: 0.6rem; align-items: center; margin-top: 0.6rem; }
.price { font-weight: 700; }

.callout, .disclaimer {
  background: var(--warn-bg);
  color: var(--warn-ink);
  border: 1px solid #e0c98a;
  border-radius: 10px;
  padding: 0.85rem 1rem;
  margin: 0 0 1.1rem;
  font-size: 0.95rem;
}
.disclaimer strong { color: var(--ink); }

.howto ol, .howto ul, article ul { padding-left: 1.2rem; }
.howto li, article li { margin: 0 0 0.4rem; }
.sources { font-size: 0.92rem; }
.sources a { color: var(--forest); }
.sources a:visited { color: var(--forest-dark); }

.faq details { margin: 0 0 0.7rem; }
.faq summary { cursor: pointer; font-weight: 700; font-family: var(--serif); font-size: 1.05rem; }
.faq details p:last-child { margin-bottom: 0; }
.faq details[open] summary { margin-bottom: 0.5rem; }

.site-footer {
  border-top: 1px solid var(--line);
  background: var(--bg-deep);
  padding: 1.6rem 0 2rem;
  color: var(--muted);
  font-size: 0.9rem;
}
.site-footer a { color: var(--forest-dark); }
.site-footer .wrap { display: flex; flex-wrap: wrap; gap: 0.6rem 1.4rem; justify-content: space-between; }

.fine { font-size: 0.85rem; color: var(--muted); }
table { width: 100%; border-collapse: collapse; font-size: 0.92rem; margin: 0 0 1rem; }
th, td { text-align: left; padding: 0.45rem 0.5rem; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.04em; color: var(--muted); }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; font-family: var(--mono); }

@media print {
  .site-header, .site-footer, .cta, .skip { display: none !important; }
  .results { position: static; color: #000; background: #fff; border: 1px solid #000; }
  .metric dt, .results .note { color: #333; }
  .metric dd, .metric.primary dd { color: #000; }
  body { background: #fff; }
}