:root {
  --bg: #111315;
  --surface: #1a1d20;
  --text: #f5f3ee;
  --muted: #b7b7b1;
  --line: #353a3f;
  --accent: #f28b22;
  --paper: #f4f1ea;
  --ink: #17191b;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; font-family: Inter, system-ui, -apple-system, 'Segoe UI', Arial, sans-serif; background: var(--bg); color: var(--text); line-height: 1.55; }
a { color: inherit; text-decoration: none; }
.container { width: min(1120px, calc(100% - 40px)); margin: auto; }
header { border-bottom: 1px solid var(--line); background: rgba(17,19,21,.96); position: sticky; top: 0; z-index: 10; backdrop-filter: blur(10px); }
.header-inner { min-height: 70px; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.brand { font-size: 24px; font-weight: 950; letter-spacing: -.04em; }
.brand span { color: var(--accent); }
nav { display: flex; gap: 18px; font-size: 14px; }
nav a:hover, .text-link:hover { color: var(--accent); }
.hero { padding: 72px 0 54px; }
.eyebrow { color: var(--accent); font-size: 12px; font-weight: 900; text-transform: uppercase; letter-spacing: .16em; }
h1 { font-size: clamp(42px, 6vw, 72px); line-height: .98; letter-spacing: -.05em; margin: 14px 0 20px; }
h2 { font-size: clamp(30px, 4vw, 46px); line-height: 1.05; letter-spacing: -.035em; margin: 0 0 18px; }
h3 { margin: 0 0 8px; font-size: 24px; }
.lead { color: #d7d5cf; max-width: 820px; font-size: 20px; }
.actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 26px; }
.btn { display: inline-flex; align-items: center; justify-content: center; padding: 12px 18px; border: 1px solid var(--line); border-radius: 999px; font-weight: 850; cursor: pointer; background: transparent; color: inherit; font: inherit; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--ink); }
.section { padding: 64px 0; }
.light { background: var(--paper); color: var(--ink); }
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.card { padding: 24px; border-radius: 18px; border: 1px solid var(--line); background: var(--surface); }
.light .card { background: #fff; border-color: #ddd7cd; }
.card p { color: var(--muted); margin-bottom: 0; }
.light .card p { color: #5f625d; }
.card.service { transition: transform .15s ease, border-color .15s ease; }
.card.service:hover { transform: translateY(-2px); border-color: var(--accent); }
.service-arrow { color: var(--accent); font-weight: 900; margin-top: 18px; display: inline-block; }
.calc-layout { display: grid; grid-template-columns: 1.08fr .92fr; gap: 22px; align-items: start; }
.form-card, .result-card { padding: 26px; border-radius: 20px; background: #fff; color: var(--ink); border: 1px solid #ddd7cd; }
.result-card { position: sticky; top: 92px; }
.fields { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.field { display: grid; gap: 6px; }
.field.full { grid-column: 1 / -1; }
label { font-weight: 800; font-size: 14px; }
input, select, textarea { width: 100%; padding: 12px 13px; border: 1px solid #cfc8bc; border-radius: 10px; font: inherit; background: #fff; color: #17191b; }
textarea { min-height: 90px; resize: vertical; }
.help { font-size: 12px; color: #6a6c68; }
.result { display: grid; gap: 10px; margin: 18px 0; }
.metric { padding: 14px; border-radius: 12px; background: #f1ede4; }
.metric b { display: block; font-size: 28px; }
.notice { padding: 14px; border-left: 4px solid var(--accent); background: #fff4e8; color: #413b34; border-radius: 8px; font-size: 14px; }
.error { color: #9f1d1d; font-weight: 800; min-height: 24px; }
.status { min-height: 24px; color: #28612d; font-weight: 800; }
ul.clean { padding-left: 20px; }
.contact-actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }
.contact-actions .btn { padding: 10px 13px; font-size: 13px; }
.contact-label { margin-top: 20px; font-weight: 900; }
.tech-note { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 20px; }
.tech-note .card { background: #fff; color: var(--ink); border-color: #ddd7cd; }
.tech-note .card p { color: #5f625d; }
footer { padding: 36px 0 50px; border-top: 1px solid var(--line); color: #c9c7c2; }
.breadcrumbs { padding-top: 18px; color: var(--muted); font-size: 13px; }
.breadcrumbs a:hover { color: var(--accent); }
.faq-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.faq-item { border: 1px solid var(--line); border-radius: 16px; padding: 20px; background: var(--surface); }
.light .faq-item { background: #fff; border-color: #ddd7cd; }
.faq-item h3 { font-size: 19px; }
.faq-item p { margin: 8px 0 0; color: var(--muted); }
.light .faq-item p { color: #5f625d; }
.related-links { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 18px; }
.related-links a { border: 1px solid var(--line); border-radius: 999px; padding: 9px 12px; font-size: 13px; font-weight: 800; }
.related-links a:hover { border-color: var(--accent); color: var(--accent); }
.seo-copy { max-width: 880px; }
.seo-copy p { color: var(--muted); }
.light .seo-copy p { color: #5f625d; }
@media (max-width: 820px) {
  nav { display: none; }
  .grid, .grid2, .calc-layout, .tech-note, .faq-grid { grid-template-columns: 1fr; }
  .result-card { position: static; }
}
@media (max-width: 560px) {
  .container { width: min(100% - 28px, 1120px); }
  .hero { padding: 52px 0 40px; }
  .section { padding: 50px 0; }
  .fields { grid-template-columns: 1fr; }
  .field.full { grid-column: auto; }
  h1 { font-size: 44px; }
  .contact-actions .btn { flex: 1 1 42%; }
}