:root {
  --ink: #17202a;
  --muted: #667085;
  --paper: #f5f7f9;
  --card: #ffffff;
  --line: #dde2e8;
  --accent: #d97706;
  --accent-dark: #9a4d00;
  --accent-soft: #fff2dc;
  --nav: #17202a;
  --nav-ink: #fffaf0;
  --success: #176c49;
  --radius: 18px;
  --shadow: 0 14px 40px rgba(23, 32, 42, 0.08);
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--paper);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; min-width: 320px; background: var(--paper); color: var(--ink); line-height: 1.6; }
a { color: inherit; }
img { max-width: 100%; }
button, input, select { font: inherit; }

.site-header { position: sticky; top: 0; z-index: 30; background: rgba(23, 32, 42, 0.97); color: var(--nav-ink); border-bottom: 1px solid rgba(255,255,255,.12); }
.header-inner { width: min(1180px, calc(100% - 32px)); min-height: 72px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 12px; color: inherit; text-decoration: none; font-weight: 800; letter-spacing: -.02em; }
.brand-mark { display: grid; place-items: center; width: 42px; height: 42px; border-radius: 12px; color: #1c232c; background: var(--accent); font-size: 14px; }
.brand-text { display: grid; line-height: 1.15; }
.brand-text small { margin-top: 4px; color: #c8ced6; font-size: 11px; font-weight: 500; letter-spacing: .02em; }
.main-nav { display: flex; align-items: center; gap: 22px; }
.main-nav a { color: #eef1f5; text-decoration: none; font-size: 14px; }
.main-nav a:hover, .main-nav a[aria-current="page"] { color: #ffc56d; }
.menu-toggle { display: none; border: 1px solid rgba(255,255,255,.25); border-radius: 10px; background: transparent; color: white; padding: 8px 12px; }

.breadcrumbs { width: min(1180px, calc(100% - 32px)); margin: 22px auto 0; color: var(--muted); font-size: 13px; }
.breadcrumbs a { color: var(--accent-dark); text-decoration: none; }
.breadcrumbs span { margin: 0 7px; }

.hero { padding: 72px 0 54px; overflow: hidden; background: radial-gradient(circle at 82% 15%, rgba(217,119,6,.22), transparent 34%), linear-gradient(145deg, #18222d, #273748); color: #fff; }
.hero-inner { width: min(1180px, calc(100% - 32px)); margin: 0 auto; display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(280px, .65fr); align-items: center; gap: 52px; }
.eyebrow { margin: 0 0 12px; color: #ffc56d; font-size: 13px; font-weight: 800; letter-spacing: .09em; text-transform: uppercase; }
.hero h1, .page-title { margin: 0; font-size: clamp(36px, 5vw, 66px); line-height: 1.03; letter-spacing: -.045em; }
.hero p { max-width: 740px; margin: 22px 0 0; color: #d9e0e8; font-size: clamp(17px, 2vw, 21px); }
.hero-stats { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 12px; }
.hero-stat { padding: 20px; border: 1px solid rgba(255,255,255,.12); border-radius: var(--radius); background: rgba(255,255,255,.07); backdrop-filter: blur(6px); }
.hero-stat strong { display: block; color: #ffc56d; font-size: 31px; line-height: 1.1; }
.hero-stat span { display: block; margin-top: 7px; color: #d9e0e8; font-size: 13px; }

.container { width: min(1180px, calc(100% - 32px)); margin: 0 auto; }
.section { padding: 62px 0; }
.section--tight { padding: 34px 0; }
.section--white { background: #fff; }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 28px; margin-bottom: 28px; }
.section-heading h2 { margin: 0; font-size: clamp(27px, 3vw, 40px); line-height: 1.1; letter-spacing: -.03em; }
.section-heading p { max-width: 600px; margin: 0; color: var(--muted); }

.category-nav { display: flex; flex-wrap: wrap; gap: 10px; margin: 0 0 30px; padding: 0; list-style: none; }
.category-nav a { display: inline-flex; padding: 10px 15px; border: 1px solid var(--line); border-radius: 999px; background: #fff; color: #344054; text-decoration: none; font-size: 14px; font-weight: 700; }
.category-nav a:hover { border-color: var(--accent); color: var(--accent-dark); }

.card-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.calc-card { display: flex; min-height: 225px; flex-direction: column; padding: 24px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--card); box-shadow: 0 5px 18px rgba(23,32,42,.035); text-decoration: none; transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease; }
.calc-card:hover { transform: translateY(-3px); border-color: #e1a349; box-shadow: var(--shadow); }
.calc-card__tag { align-self: flex-start; margin-bottom: 22px; padding: 5px 9px; border-radius: 7px; background: var(--accent-soft); color: var(--accent-dark); font-size: 11px; font-weight: 800; letter-spacing: .04em; text-transform: uppercase; }
.calc-card h3 { margin: 0 0 10px; font-size: 21px; line-height: 1.2; letter-spacing: -.02em; }
.calc-card p { margin: 0; color: var(--muted); font-size: 14px; }
.calc-card__link { margin-top: auto; padding-top: 20px; color: var(--accent-dark); font-weight: 800; }

.page-hero { padding: 48px 0 34px; }
.page-hero h1 { max-width: 900px; margin: 10px 0 14px; font-size: clamp(34px, 4.8vw, 58px); line-height: 1.04; letter-spacing: -.045em; }
.page-hero__lead { max-width: 790px; margin: 0; color: var(--muted); font-size: 18px; }
.verified { display: inline-flex; align-items: center; gap: 8px; margin-top: 18px; padding: 7px 11px; border-radius: 9px; background: #eaf7f0; color: var(--success); font-size: 12px; font-weight: 750; }

.calculator-layout { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(340px, .95fr); gap: 24px; align-items: start; }
.calculator-panel, .results-panel, .content-panel { border: 1px solid var(--line); border-radius: var(--radius); background: #fff; box-shadow: 0 7px 25px rgba(23,32,42,.04); }
.calculator-panel { padding: 28px; }
.calculator-panel h2, .results-panel h2 { margin: 0 0 8px; font-size: 23px; letter-spacing: -.02em; }
.panel-note { margin: 0 0 24px; color: var(--muted); font-size: 13px; }
.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 16px; }
.field { display: grid; gap: 7px; }
.field--wide { grid-column: 1 / -1; }
.field label { color: #344054; font-size: 13px; font-weight: 750; }
.input-wrap { display: flex; align-items: stretch; overflow: hidden; border: 1px solid #cdd4dc; border-radius: 11px; background: #fff; transition: border-color .2s, box-shadow .2s; }
.input-wrap:focus-within { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(217,119,6,.12); }
.input-wrap input, .input-wrap select { min-width: 0; width: 100%; border: 0; outline: 0; padding: 12px 13px; background: transparent; color: var(--ink); }
.input-unit { display: grid; place-items: center; min-width: 52px; padding: 0 10px; border-left: 1px solid var(--line); background: #f8f9fb; color: var(--muted); font-size: 12px; }
.field-help { color: var(--muted); font-size: 11px; line-height: 1.35; }
.calculate-button { width: 100%; margin-top: 22px; border: 0; border-radius: 12px; padding: 14px 18px; background: var(--accent); color: #211506; cursor: pointer; font-weight: 850; }
.calculate-button:hover { background: #e58a13; }

.results-panel { position: sticky; top: 96px; padding: 28px; background: #1d2935; color: #fff; }
.results-panel .panel-note { color: #bdc8d3; }
.results-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 12px; }
.result-card { min-height: 104px; padding: 16px; border: 1px solid rgba(255,255,255,.12); border-radius: 13px; background: rgba(255,255,255,.055); }
.result-card--primary { grid-column: 1 / -1; background: var(--accent); color: #201407; border-color: transparent; }
.result-card__label { display: block; opacity: .76; font-size: 12px; }
.result-card__value { display: block; margin-top: 7px; font-size: clamp(20px, 2.6vw, 29px); line-height: 1.12; letter-spacing: -.02em; overflow-wrap: anywhere; }
.result-actions { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 18px; }
.ghost-button { border: 1px solid rgba(255,255,255,.24); border-radius: 9px; padding: 9px 12px; background: transparent; color: white; cursor: pointer; font-size: 12px; }
.result-status { margin: 12px 0 0; color: #bdc8d3; font-size: 11px; }

.article-layout { display: grid; grid-template-columns: minmax(0, 1fr) 270px; gap: 32px; align-items: start; }
.content-panel { padding: clamp(24px, 4vw, 44px); }
.content-panel h2 { margin: 34px 0 12px; font-size: 28px; letter-spacing: -.025em; }
.content-panel h2:first-child { margin-top: 0; }
.content-panel h3 { margin: 24px 0 8px; font-size: 20px; }
.content-panel p, .content-panel li { color: #475467; }
.content-panel code { padding: 2px 5px; border-radius: 5px; background: #f1f3f5; color: #7a3e00; }
.content-panel .formula { overflow-x: auto; padding: 18px; border-left: 4px solid var(--accent); border-radius: 8px; background: var(--accent-soft); color: #553000; font-weight: 700; }
.warning { margin: 22px 0; padding: 17px 18px; border: 1px solid #f2d097; border-radius: 12px; background: #fff9ee; color: #68420a; }
.toc { position: sticky; top: 96px; padding: 20px; border: 1px solid var(--line); border-radius: 15px; background: #fff; }
.toc strong { display: block; margin-bottom: 10px; }
.toc a { display: block; padding: 6px 0; color: var(--muted); text-decoration: none; font-size: 13px; }
.toc a:hover { color: var(--accent-dark); }
.source-list { padding-left: 18px; }
.source-list a { color: #8b4a00; }

.cta { display: grid; grid-template-columns: 1fr auto; gap: 28px; align-items: center; padding: 30px; border-radius: var(--radius); background: linear-gradient(135deg, #1c2834, #34485a); color: white; }
.cta h2 { margin: 0 0 8px; font-size: 27px; }
.cta p { margin: 0; color: #cbd5df; }
.cta-button { display: inline-flex; align-items: center; justify-content: center; padding: 13px 20px; border-radius: 11px; background: var(--accent); color: #201407; text-decoration: none; font-weight: 850; white-space: nowrap; }
.advertising-section { padding: 18px 0 0; }
.advertising-offer { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 24px; align-items: center; padding: 18px 20px; border: 1px solid var(--line); border-left: 4px solid var(--accent); border-radius: 14px; background: #fff; box-shadow: 0 8px 24px rgba(23,32,42,.06); }
.advertising-offer__label { display: block; margin-bottom: 5px; color: var(--accent-dark); font-size: 11px; font-weight: 850; letter-spacing: .08em; text-transform: uppercase; }
.advertising-offer strong { display: block; color: #273444; font-size: 16px; }
.advertising-offer p { margin: 5px 0 0; color: var(--muted); font-size: 13px; }
.advertising-offer__link, .contact-email { display: inline-flex; align-items: center; justify-content: center; padding: 11px 15px; border-radius: 10px; background: var(--accent); color: #201407; text-decoration: none; font-weight: 850; white-space: nowrap; }
.contact-content { max-width: 860px; }
.contact-email { margin: 8px 0 16px; }

.site-footer { margin-top: 64px; padding: 46px 0 24px; background: var(--nav); color: #fff; }
.footer-grid { display: grid; grid-template-columns: 1.3fr repeat(2, 1fr); gap: 40px; }
.footer-grid h3, .footer-grid h4 { margin: 0 0 12px; }
.footer-grid p, .footer-grid a { color: #bfc9d4; font-size: 13px; }
.footer-grid a { display: block; margin: 7px 0; text-decoration: none; }
.footer-bottom { margin-top: 34px; padding-top: 20px; border-top: 1px solid rgba(255,255,255,.12); color: #aab5c0; font-size: 12px; }

.search-box { width: min(560px, 100%); margin-top: 26px; }
.search-box input { width: 100%; border: 1px solid rgba(255,255,255,.24); border-radius: 13px; padding: 14px 16px; background: rgba(255,255,255,.09); color: white; outline: none; }
.search-box input::placeholder { color: #c6d0da; }
.search-box input:focus { border-color: #ffc56d; box-shadow: 0 0 0 3px rgba(255,197,109,.15); }
.hidden-card { display: none; }

@media (max-width: 900px) {
  .hero-inner, .calculator-layout, .article-layout { grid-template-columns: 1fr; }
  .hero-stats { max-width: 520px; }
  .card-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
  .results-panel, .toc { position: static; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid > :first-child { grid-column: 1 / -1; }
  .main-nav { display: none; position: absolute; top: 72px; right: 16px; left: 16px; flex-direction: column; align-items: stretch; padding: 18px; border-radius: 13px; background: #202c38; box-shadow: var(--shadow); }
  .main-nav.open { display: flex; }
  .menu-toggle { display: inline-block; }
}

@media (max-width: 620px) {
  .hero { padding: 50px 0 42px; }
  .hero-stats, .card-grid, .form-grid, .results-grid, .footer-grid { grid-template-columns: 1fr; }
  .result-card--primary { grid-column: auto; }
  .section { padding: 46px 0; }
  .section-heading { align-items: start; flex-direction: column; }
  .calculator-panel, .results-panel { padding: 21px; }
  .cta { grid-template-columns: 1fr; }
  .cta-button { width: 100%; }
  .advertising-offer { grid-template-columns: 1fr; gap: 14px; }
  .advertising-offer__link { width: 100%; }
}

@media print {
  .site-header, .breadcrumbs, .result-actions, .cta, .advertising-section, .site-footer, .toc { display: none !important; }
  body { background: white; }
  .calculator-layout, .article-layout { display: block; }
  .calculator-panel, .results-panel, .content-panel { box-shadow: none; margin-bottom: 18px; }
  .results-panel { color: #111; background: #fff; }
  .result-card { border-color: #bbb; background: #fff; }
}

/* Расширенное SEO-наполнение калькуляторов */
.steps-list { display: grid; gap: 10px; padding-left: 24px; }
.steps-list li::marker { color: var(--accent-dark); font-weight: 800; }
.field-guide { display: grid; gap: 0; margin: 20px 0; border: 1px solid var(--line); border-radius: 14px; overflow: hidden; }
.field-guide__item { display: grid; grid-template-columns: minmax(170px, .75fr) minmax(0, 1.4fr); gap: 20px; padding: 17px 18px; background: #fff; }
.field-guide__item + .field-guide__item { border-top: 1px solid var(--line); }
.field-guide dt { color: #273444; font-weight: 800; }
.field-guide dd { margin: 0; color: #475467; }
.field-guide dd p { margin: 0; }
.field-guide dd p + p { margin-top: 7px; }
.field-guide__example { color: #273444; }
.field-guide__example strong { font-weight: 800; }
.example-box, .source-note { margin: 18px 0; padding: 18px; border-radius: 12px; background: #f7f9fb; color: #475467; }
.source-note { border-left: 4px solid var(--success); background: #eef8f3; }
.source-note a { color: var(--success); font-weight: 750; }
.faq-list { display: grid; gap: 12px; }
.faq-item { padding: 18px; border: 1px solid var(--line); border-radius: 13px; background: #fbfcfd; }
.faq-item h3 { margin: 0 0 7px; font-size: 18px; }
.faq-item p { margin: 0; }

@media (max-width: 620px) {
  .field-guide__item { grid-template-columns: 1fr; gap: 8px; }
}

/* Сценарии, блог и рекламные форматы */
.saved-calculations { margin-top: 24px; padding: 26px; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; box-shadow: 0 7px 25px rgba(23,32,42,.04); }
.saved-calculations__header { display: flex; align-items: start; justify-content: space-between; gap: 24px; }
.saved-calculations__header h2 { margin: 0 0 5px; font-size: 23px; }
.saved-calculations__header p { margin: 0; color: var(--muted); font-size: 13px; }
.text-button, .small-button { border: 1px solid var(--line); border-radius: 9px; background: #fff; color: #344054; cursor: pointer; font-weight: 750; }
.text-button { padding: 8px 11px; white-space: nowrap; }
.small-button { padding: 7px 10px; font-size: 12px; }
.text-button:hover, .small-button:hover { border-color: var(--accent); color: var(--accent-dark); }
.text-button:disabled { cursor: default; opacity: .45; }
.scenario-save-row { display: grid; grid-template-columns: 180px minmax(0, 430px); align-items: center; gap: 14px; margin: 22px 0 16px; }
.scenario-save-row label { color: #344054; font-size: 13px; font-weight: 750; }
.scenario-save-row input { width: 100%; border: 1px solid #cdd4dc; border-radius: 10px; padding: 10px 12px; outline: 0; }
.scenario-save-row input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(217,119,6,.12); }
.saved-list { display: grid; gap: 10px; }
.empty-state { margin: 5px 0 0; padding: 17px; border-radius: 11px; background: #f7f9fb; color: var(--muted); font-size: 13px; }
.saved-card { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 20px; align-items: center; padding: 16px; border: 1px solid var(--line); border-radius: 12px; }
.saved-card h3 { margin: 0; font-size: 16px; }
.saved-card__meta { margin: 2px 0; color: var(--muted); font-size: 11px; }
.saved-card__summary { margin: 5px 0 0; color: #475467; font-size: 12px; overflow-wrap: anywhere; }
.saved-card__actions { display: flex; flex-wrap: wrap; align-items: center; justify-content: flex-end; gap: 8px; }
.compare-check { color: #344054; font-size: 12px; font-weight: 700; white-space: nowrap; }
.compare-check input { accent-color: var(--accent); }
.comparison-panel { margin-top: 24px; }
.comparison-panel h3 { margin: 0 0 10px; }
.comparison-scroll { overflow-x: auto; border: 1px solid var(--line); border-radius: 12px; }
.comparison-table { width: 100%; min-width: 620px; border-collapse: collapse; font-size: 12px; }
.comparison-table th, .comparison-table td { padding: 11px 12px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
.comparison-table thead th { background: var(--accent-soft); color: #40301c; }
.comparison-table tbody th { width: 28%; color: #344054; }
.comparison-table tr:last-child th, .comparison-table tr:last-child td { border-bottom: 0; }
.blog-teaser { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 28px; align-items: center; padding: 30px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--paper); }
.blog-teaser h2 { margin: 4px 0 9px; font-size: clamp(24px, 3vw, 34px); line-height: 1.15; }
.blog-teaser p { max-width: 780px; margin: 0; color: var(--muted); }
.blog-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
.blog-card { display: flex; flex-direction: column; min-height: 290px; padding: 27px; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; text-decoration: none; box-shadow: 0 6px 22px rgba(23,32,42,.045); }
.blog-card:hover { border-color: var(--accent); box-shadow: var(--shadow); }
.blog-card h2 { margin: 12px 0 10px; font-size: 25px; line-height: 1.18; letter-spacing: -.025em; }
.blog-card p { margin: 0; color: var(--muted); }
.blog-card__link { margin-top: auto; padding-top: 24px; color: var(--accent-dark); font-weight: 800; }
.article-meta { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 18px; color: var(--muted); font-size: 12px; }
.blog-article { max-width: 860px; }
.blog-article h2 { scroll-margin-top: 92px; }
.blog-article__lead { padding: 20px; border-left: 4px solid var(--accent); border-radius: 10px; background: var(--accent-soft); color: #4a3520; font-size: 17px; }
.blog-calculators { display: grid; gap: 12px; margin: 28px 0; padding: 22px; border: 1px solid var(--line); border-radius: 14px; background: #f7f9fb; }
.blog-calculators h2 { margin: 0; }
.blog-calculators__links { display: flex; flex-wrap: wrap; gap: 10px; }
.blog-calculators__links a { display: inline-flex; padding: 10px 13px; border-radius: 9px; background: var(--accent); color: #201407; text-decoration: none; font-size: 13px; font-weight: 800; }
.placement-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; margin: 20px 0; }
.placement-card { padding: 20px; border: 1px solid var(--line); border-radius: 13px; background: #f9fafb; }
.placement-card h3 { margin-top: 0; }

@media (max-width: 900px) {
  .main-nav { max-height: calc(100vh - 96px); overflow-y: auto; }
  .blog-grid { grid-template-columns: 1fr; }
}

@media (max-width: 620px) {
  .saved-calculations { padding: 20px; }
  .saved-calculations__header, .saved-card, .blog-teaser { grid-template-columns: 1fr; }
  .saved-calculations__header { flex-direction: column; }
  .scenario-save-row, .placement-grid { grid-template-columns: 1fr; }
  .saved-card__actions { justify-content: flex-start; }
  .blog-card { min-height: 0; }
}

@media print {
  .saved-calculations, .blog-teaser { display: none !important; }
}