:root {
  --bg: #faf9f7; --card: #ffffff; --ink: #1f2933; --muted: #616e7c;
  --accent: #c2410c; --accent-ink: #ffffff; --line: #e4e0da; --good: #14633d;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #16181d; --card: #1f232b; --ink: #e8e6e3; --muted: #9aa5b1; --accent: #f97316; --accent-ink: #1a1a1a; --line: #333a45; --good: #4ade80; }
}
* { box-sizing: border-box; margin: 0; }
body {
  font: 16px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg); color: var(--ink); -webkit-text-size-adjust: 100%;
}
.wrap { max-width: 760px; margin: 0 auto; padding: 0 1rem 3rem; }
header.site { border-bottom: 2px solid var(--accent); background: var(--card); }
header.site .wrap { display: flex; align-items: baseline; gap: .75rem; padding: .8rem 1rem; flex-wrap: wrap; }
.logo { font-weight: 800; font-size: 1.15rem; color: var(--ink); text-decoration: none; letter-spacing: -.02em; }
.logo span { color: var(--accent); }
.tagline { color: var(--muted); font-size: .85rem; }
nav.crumbs { font-size: .82rem; color: var(--muted); margin: 1rem 0 0; }
nav.crumbs a { color: var(--muted); }
h1 { font-size: 1.7rem; line-height: 1.25; margin: .5rem 0 .75rem; letter-spacing: -.02em; }
h2 { font-size: 1.2rem; margin: 2rem 0 .6rem; }
p.intro { color: var(--muted); }
p { margin: 0 0 .9rem; }
a { color: var(--accent); }

.calc { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 1.25rem; margin: 1.25rem 0; }
.calc form { display: grid; gap: .9rem; grid-template-columns: 1fr 1fr; }
.field { display: flex; flex-direction: column; gap: .25rem; }
.field.full { grid-column: 1 / -1; }
label { font-size: .85rem; font-weight: 600; }
input, select {
  font: inherit; padding: .55rem .65rem; border: 1.5px solid var(--line); border-radius: 8px;
  background: var(--bg); color: var(--ink); width: 100%;
}
input:focus, select:focus { outline: 2px solid var(--accent); border-color: transparent; }
input.bad { border-color: #dc2626; }
.help { font-size: .78rem; color: var(--muted); }
.results { border-top: 1.5px dashed var(--line); margin-top: 1.1rem; padding-top: .5rem; }
.results .row { padding: .55rem 0; border-bottom: 1px solid var(--line); display: flex; flex-wrap: wrap; gap: .35rem .75rem; align-items: baseline; }
.results .row:last-of-type { border-bottom: 0; }
.rlabel { color: var(--muted); font-size: .9rem; flex: 1 1 12rem; }
.results strong { font-size: 1.05rem; color: var(--good); }
.results .note { flex-basis: 100%; font-size: .8rem; color: var(--muted); }
.muted { color: var(--muted); }
button.print { margin-top: 1rem; font: inherit; font-weight: 600; background: var(--accent); color: var(--accent-ink); border: 0; border-radius: 8px; padding: .55rem 1rem; cursor: pointer; }

.faq details { border: 1px solid var(--line); border-radius: 10px; padding: .7rem .9rem; margin-bottom: .6rem; background: var(--card); }
.faq summary { font-weight: 600; cursor: pointer; }
.faq p { margin: .6rem 0 0; color: var(--muted); }

.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(210px, 1fr)); gap: .8rem; margin: 1rem 0 1.5rem; }
.card { display: block; background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: .9rem; text-decoration: none; color: var(--ink); }
.card:hover { border-color: var(--accent); }
.card strong { display: block; margin-bottom: .25rem; }
.card span { font-size: .82rem; color: var(--muted); }
ul.related { padding-left: 1.2rem; }

footer.site { border-top: 1px solid var(--line); margin-top: 3rem; }
footer.site .wrap { padding: 1.25rem 1rem; font-size: .82rem; color: var(--muted); }
footer.site a { color: var(--muted); }

@media (max-width: 560px) { .calc form { grid-template-columns: 1fr; } h1 { font-size: 1.45rem; } }
@media print {
  header.site, footer.site, .faq, .how, nav.crumbs, button.print, .related-sec, p.intro { display: none !important; }
  .calc { border: 0; padding: 0; }
  body { background: #fff; color: #000; }
}