/* KalkulatorJam.com — CSS kustom ringan, mobile-first */
:root {
  --bg: #f6f8fd;
  --surface: #ffffff;
  --surface-2: #eef2fb;
  --text: #101733;
  --muted: #55608a;
  --border: #dfe5f4;
  --primary: #3d5bf5;
  --primary-2: #7a45f0;
  --primary-soft: #eaeeff;
  --navy: #0d1330;
  --navy-text: #e7ebff;
  --ok: #0f9d63;
  --danger: #d63b46;
  --shadow: 0 1px 2px rgba(16, 23, 51, .06), 0 12px 28px -18px rgba(16, 23, 51, .28);
  --radius: 16px;
  --max: 1120px;
}
html[data-theme="dark"] {
  --bg: #070b1c;
  --surface: #101833;
  --surface-2: #17203f;
  --text: #eef1fb;
  --muted: #a6b0d6;
  --border: #26315a;
  --primary: #7f95ff;
  --primary-2: #b48cff;
  --primary-soft: #1b2450;
  --navy: #0a1029;
  --navy-text: #e7ebff;
  --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 16px 32px -20px rgba(0, 0, 0, .8);
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.65;
  overflow-x: hidden;
}
img, svg, table { max-width: 100%; }
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
.wrap { width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 16px; }
.skip { position: absolute; left: -9999px; }
.skip:focus { left: 8px; top: 8px; background: var(--surface); padding: 8px 12px; z-index: 99; border-radius: 8px; }

/* Header */
header.site {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--surface) 92%, transparent);
  backdrop-filter: saturate(160%) blur(8px);
  border-bottom: 1px solid var(--border);
}
.hrow { display: flex; align-items: center; gap: 10px; min-height: 62px; }
.brand { display: flex; align-items: center; gap: 9px; font-weight: 800; color: var(--text); letter-spacing: -.02em; }
.brand:hover { text-decoration: none; }
.brand span { font-size: 1.05rem; }
.nav { display: none; margin-left: auto; gap: 2px; }
.nav a {
  color: var(--muted); font-size: .93rem; font-weight: 600;
  padding: 8px 11px; border-radius: 10px; transition: background .18s, color .18s;
}
.nav a:hover, .nav a[aria-current="page"] { background: var(--primary-soft); color: var(--primary); text-decoration: none; }
.htools { display: flex; align-items: center; gap: 8px; margin-left: auto; }
.nav + .htools { margin-left: 8px; }
.iconbtn, select.lang {
  min-height: 42px; min-width: 42px; display: inline-flex; align-items: center; justify-content: center;
  gap: 6px; background: var(--surface); color: var(--text); border: 1px solid var(--border);
  border-radius: 11px; font: inherit; font-size: .88rem; font-weight: 600; cursor: pointer;
  transition: border-color .18s, transform .18s, background .18s;
}
select.lang { padding: 0 8px; }
.iconbtn:hover, select.lang:hover { border-color: var(--primary); transform: translateY(-1px); }
.burger { display: inline-flex; }
#mobilenav { display: none; padding: 8px 0 16px; border-top: 1px solid var(--border); }
#mobilenav.open { display: block; }
#mobilenav a { display: block; padding: 12px 12px; border-radius: 10px; color: var(--text); font-weight: 600; }
#mobilenav a:hover { background: var(--surface-2); text-decoration: none; }
@media (min-width: 940px) {
  .nav { display: flex; }
  .burger { display: none; }
  #mobilenav { display: none !important; }
}

/* Hero + sections */
main { display: block; }
.hero { padding: 34px 0 8px; }
.eyebrow {
  display: inline-block; background: var(--primary-soft); color: var(--primary);
  font-size: .78rem; font-weight: 700; letter-spacing: .06em; text-transform: uppercase;
  padding: 6px 12px; border-radius: 999px;
}
h1 { font-size: 1.85rem; line-height: 1.22; letter-spacing: -.025em; margin: 14px 0 10px; }
h2 { font-size: 1.3rem; line-height: 1.3; letter-spacing: -.015em; margin: 32px 0 10px; }
h3 { font-size: 1.06rem; margin: 20px 0 8px; }
p, li { color: var(--text); overflow-wrap: break-word; }
.lead { color: var(--muted); font-size: 1.03rem; }
@media (min-width: 768px) { h1 { font-size: 2.5rem; } h2 { font-size: 1.55rem; } }

.card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); box-shadow: var(--shadow); padding: 18px;
}
.calcwrap { margin: 18px 0 8px; }
.calcwrap h2 { margin-top: 0; }
.grid { display: grid; gap: 12px; grid-template-columns: 1fr; }
@media (min-width: 620px) { .grid.two { grid-template-columns: 1fr 1fr; } }
label.f { display: block; font-size: .88rem; font-weight: 700; color: var(--muted); margin-bottom: 6px; }
input[type="text"], input[type="time"], input[type="date"], input[type="datetime-local"], input[type="number"], select {
  width: 100%; min-height: 50px; padding: 12px 14px; font: inherit; color: var(--text);
  background: var(--surface); border: 1px solid var(--border); border-radius: 12px;
  transition: border-color .18s, box-shadow .18s; appearance: none;
}
input:focus, select:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 4px var(--primary-soft); }
.check { display: flex; align-items: center; gap: 10px; padding: 12px 0; }
.check input { width: 22px; height: 22px; accent-color: var(--primary); }
.check label { font-weight: 600; font-size: .93rem; }
.btns { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 16px; }
.btn {
  min-height: 50px; padding: 0 18px; display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  border-radius: 12px; border: 1px solid transparent; font: inherit; font-weight: 700; cursor: pointer;
  transition: transform .16s, box-shadow .16s, background .16s, border-color .16s;
}
.btn.primary { background: linear-gradient(120deg, var(--primary), var(--primary-2)); color: #fff; flex: 1 1 160px; }
.btn.primary:hover { transform: translateY(-2px); box-shadow: 0 12px 24px -12px var(--primary); }
.btn.ghost { background: var(--surface); border-color: var(--border); color: var(--text); }
.btn.ghost:hover { border-color: var(--primary); color: var(--primary); transform: translateY(-2px); }
.result { margin-top: 16px; display: none; }
.result.show { display: block; }
.result .rbox { background: var(--surface-2); border: 1px solid var(--border); border-radius: 14px; padding: 16px; }
.rmain { font-size: 1.05rem; font-weight: 700; color: var(--muted); }
.rmain b { display: block; font-size: 1.9rem; line-height: 1.2; color: var(--primary); letter-spacing: -.02em; word-break: break-word; }
.rlist { list-style: none; margin: 14px 0 0; padding: 0; }
.rlist li { display: flex; flex-wrap: wrap; gap: 4px 10px; justify-content: space-between; padding: 9px 0; border-top: 1px dashed var(--border); font-size: .95rem; }
.rlist li span:first-child { color: var(--muted); }
.rlist li span:last-child { font-weight: 700; }
.note { margin: 12px 0 0; font-size: .86rem; color: var(--muted); }
.err { display: none; margin-top: 14px; padding: 12px 14px; border-radius: 12px; background: color-mix(in srgb, var(--danger) 12%, transparent); border: 1px solid color-mix(in srgb, var(--danger) 40%, transparent); color: var(--danger); font-weight: 600; font-size: .93rem; }
.err.show { display: block; }

/* Article */
article.seo { margin-top: 8px; }
article.seo table { width: 100%; border-collapse: collapse; margin: 14px 0; font-size: .92rem; display: block; overflow-x: auto; white-space: nowrap; }
@media (min-width: 700px) { article.seo table { display: table; white-space: normal; } }
article.seo th, article.seo td { border: 1px solid var(--border); padding: 10px 12px; text-align: left; }
article.seo th { background: var(--surface-2); font-size: .86rem; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); }
article.seo ul, article.seo ol { padding-left: 22px; }
article.seo li { margin: 6px 0; }
.formula { background: var(--navy); color: var(--navy-text); border-radius: 12px; padding: 14px 16px; font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: .9rem; overflow-x: auto; }

/* Tool cards */
.tools { display: grid; gap: 14px; grid-template-columns: 1fr; margin: 18px 0; }
@media (min-width: 640px) { .tools { grid-template-columns: 1fr 1fr; } }
@media (min-width: 980px) { .tools { grid-template-columns: repeat(3, 1fr); } }
.tool {
  display: block; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 18px; color: var(--text); box-shadow: var(--shadow);
  transition: transform .2s, box-shadow .2s, border-color .2s;
}
.tool:hover { transform: translateY(-4px); border-color: var(--primary); box-shadow: 0 18px 34px -20px var(--primary); text-decoration: none; }
.tool .ti { width: 38px; height: 38px; display: grid; place-items: center; border-radius: 11px; background: var(--primary-soft); color: var(--primary); margin-bottom: 10px; }
.tool strong { display: block; font-size: 1.02rem; letter-spacing: -.01em; }
.tool small { display: block; color: var(--muted); font-size: .88rem; margin-top: 4px; line-height: 1.5; }

/* FAQ */
.faq { border: 1px solid var(--border); border-radius: 14px; overflow: hidden; background: var(--surface); }
.faq + .faq { margin-top: 10px; }
.faq button {
  width: 100%; display: flex; gap: 12px; align-items: flex-start; justify-content: space-between;
  background: none; border: 0; padding: 16px; font: inherit; font-weight: 700; color: var(--text);
  text-align: left; cursor: pointer; min-height: 52px;
}
.faq button:hover { background: var(--surface-2); }
.faq button .pm { flex: 0 0 auto; color: var(--primary); font-size: 1.3rem; line-height: 1; }
.faq .ans { display: none; padding: 0 16px 16px; color: var(--muted); }
.faq.open .ans { display: block; }

/* Ad slots */
.adslot {
  min-height: 100px; margin: 22px 0; display: grid; place-items: center;
  border: 1px dashed var(--border); border-radius: 12px; color: var(--muted);
  font-size: .78rem; letter-spacing: .08em; text-transform: uppercase; background: var(--surface);
}
@media (min-width: 768px) { .adslot { min-height: 120px; } }

.disc { margin: 24px 0; font-size: .86rem; color: var(--muted); border-left: 3px solid var(--primary); padding: 4px 0 4px 14px; }
.crumbs { font-size: .84rem; color: var(--muted); padding-top: 16px; }
.crumbs a { color: var(--muted); }
.related { display: flex; flex-wrap: wrap; gap: 8px; margin: 12px 0 0; padding: 0; list-style: none; }
.related a { display: inline-block; padding: 8px 13px; border-radius: 999px; background: var(--primary-soft); color: var(--primary); font-size: .88rem; font-weight: 600; transition: transform .16s; }
.related a:hover { transform: translateY(-2px); text-decoration: none; }

/* Footer */
footer.site { background: var(--navy); color: var(--navy-text); margin-top: 44px; padding: 36px 0 22px; }
footer.site a { color: var(--navy-text); opacity: .82; font-size: .93rem; }
footer.site a:hover { opacity: 1; }
.fgrid { display: grid; gap: 24px; grid-template-columns: 1fr; }
@media (min-width: 700px) { .fgrid { grid-template-columns: 1.4fr 1fr 1fr 1fr; } }
footer.site h3 { font-size: .82rem; text-transform: uppercase; letter-spacing: .1em; opacity: .6; margin: 0 0 10px; }
footer.site ul { list-style: none; margin: 0; padding: 0; }
footer.site li { margin: 7px 0; }
footer.site p { color: var(--navy-text); opacity: .78; font-size: .92rem; }
.copy { margin-top: 26px; padding-top: 16px; border-top: 1px solid rgba(255,255,255,.12); font-size: .85rem; opacity: .7; }

@media print {
  header.site, footer.site, .adslot, .btns, .nav, .related, .crumbs, article.seo { display: none !important; }
  body { background: #fff; color: #000; }
  .result { display: block !important; }
}