:root{
  --ink:#16222b;--muted:#4a5a66;--bg:#fbfaf7;--card:#fff;--line:#dfe5e8;
  --brand:#0f4c5c;--brand-d:#0a3541;--accent:#e07a1f;--accent-d:#9a4a0a;/* was #b85f10 (4.3:1 on bg); now 6.3:1 text colour on light bg */--accent-h:#f29442;/* hover fill for orange buttons, dark text 7:1 */
  --soft:#eef5f6;--warn:#fff6e6;--warn-line:#f0c987;--ok:#e8f5ec;
  --r:14px;--w:780px;--wide:1120px;
}
*{box-sizing:border-box}
html{font-size:100%;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:19px/1.7 system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif}
img{max-width:100%;height:auto}
a{color:var(--brand);text-underline-offset:3px}
a:hover{color:var(--accent-d)}
:focus-visible{outline:3px solid var(--brand-d);outline-offset:2px;border-radius:4px}/* orange ring was 2.9:1 on page bg; dark ring 12:1 */
.hero :focus-visible,.lead :focus-visible,.site-footer :focus-visible,.pa-head :focus-visible,.pa-fab:focus-visible,.pa-user :focus-visible{outline-color:#fff}
.skip{position:absolute;left:-999px;top:0;background:#000;color:#fff;padding:10px 14px;z-index:99}
.skip:focus{left:8px;top:8px}
.wrap{max-width:var(--wide);margin:0 auto;padding:0 20px}

/* header */
.site-header{background:var(--card);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}
.bar{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:68px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--brand);font-weight:700;font-size:1.05rem}
.nav{display:flex;align-items:center;gap:6px;flex-wrap:wrap}
.nav a{padding:8px 10px;text-decoration:none;color:var(--ink);border-radius:8px;font-size:.88rem;line-height:1.3}
.nav a:hover,.nav a[aria-current]{background:var(--soft);color:var(--brand)}
.nav .nav-cta{color:var(--ink);margin-left:6px;font-weight:700}
.nav .nav-cta:hover{color:var(--ink);background:var(--accent-h)}
.menu-btn{display:none;background:var(--soft);border:1px solid var(--line);border-radius:10px;padding:10px 14px;font:inherit;font-size:.95rem;color:var(--brand)}

/* buttons */
.btn{display:inline-block;border:2px solid transparent;border-radius:12px;padding:13px 22px;font:inherit;font-weight:700;font-size:1rem;line-height:1.2;text-decoration:none;cursor:pointer;text-align:center}
.btn-primary{background:var(--accent);color:var(--ink)}/* white on #e07a1f was 3.0:1; ink is 5.4:1, same orange */
.btn-primary:hover{background:var(--accent-h);color:var(--ink)}
.btn-outline{background:transparent;border-color:var(--brand);color:var(--brand)}
.btn-outline:hover{background:var(--soft)}
.btn-wa{background:#17803f;color:#fff}.btn-wa:hover{background:#116a34;color:#fff}/* was #1f9d55 = 3.5:1; now 5.0:1 */

/* hero */
.hero{background:linear-gradient(135deg,var(--brand) 0%,#1b6b7d 100%);color:#fff;padding:56px 0 52px}
.hero h1{font-size:2.3rem;line-height:1.2;margin:0 0 14px;max-width:820px}
.hero-lead{font-size:1.25rem;max-width:720px;margin:0 0 26px;opacity:.95}
.hero-cta{display:flex;gap:12px;flex-wrap:wrap}
.hero .btn-outline{border-color:#fff;color:#fff}.hero .btn-outline:hover{background:rgba(255,255,255,.14)}

/* prose */
.prose{max-width:var(--w);margin:0 auto;padding:30px 0 20px}
.prose.home{max-width:var(--wide)}
.prose h1{font-size:2.05rem;line-height:1.25;margin:.2em 0 .4em}
.prose h2{font-size:1.55rem;line-height:1.3;margin:2em 0 .5em;padding-top:.2em}
.prose h3{font-size:1.2rem;margin:1.5em 0 .3em}
.prose p,.prose li{max-width:70ch}
.prose ul,.prose ol{padding-left:1.3em}
.prose li{margin:.3em 0}
.meta{color:var(--muted);font-size:.9rem;display:flex;gap:16px;flex-wrap:wrap;margin:0 0 14px}
.summary{background:var(--soft);border-left:5px solid var(--brand);border-radius:0 var(--r) var(--r) 0;padding:16px 20px;margin:0 0 22px;font-size:1.06rem}
.callout{background:var(--warn);border:1px solid var(--warn-line);border-radius:var(--r);padding:14px 18px;margin:1.2em 0;font-size:.97rem}
.crumbs{padding-top:16px;font-size:.88rem}
.crumbs ol{list-style:none;display:flex;gap:6px;flex-wrap:wrap;margin:0;padding:0;color:var(--muted)}
.crumbs li+li::before{content:"›";margin-right:6px}
.crumbs a{color:var(--muted)}
.toc{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:14px 20px;margin:0 0 20px;font-size:.96rem}
.toc ol{margin:.4em 0 0;padding-left:1.2em}.toc li{margin:.15em 0}

.table-wrap{overflow-x:auto;margin:1.2em 0;border:1px solid var(--line);border-radius:var(--r);background:var(--card)}
table{border-collapse:collapse;width:100%;font-size:.95rem}
th,td{padding:11px 14px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}
th{background:var(--soft);font-weight:700}
tr:last-child td{border-bottom:0}

/* cards */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px;margin:1.2em 0}
.card{display:block;background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:18px 20px;text-decoration:none;color:var(--ink);transition:box-shadow .15s,transform .15s}
.card:hover{box-shadow:0 6px 22px rgba(15,76,92,.14);transform:translateY(-2px);color:var(--ink)}
.card h3{margin:0 0 6px;font-size:1.1rem;color:var(--brand)}
.card p{margin:0 0 8px;font-size:.93rem;color:var(--muted);line-height:1.5}
.card .more{font-weight:700;font-size:.9rem;color:var(--accent-d)}
.related{margin-top:2.4em}

/* lead form */
.lead{background:var(--brand);color:#fff;border-radius:var(--r);padding:26px 26px 22px;margin:2em 0}
.lead h2{margin:0 0 6px;font-size:1.45rem;color:#fff;padding:0}
.lead p{margin:0 0 14px}
.lead a{color:#ffd9b0}
.lead-form{display:grid;gap:12px;max-width:520px}
.lead-form label{display:grid;gap:5px;font-weight:600;font-size:.95rem}
.lead-form input[type=text],.lead-form input[type=tel],.lead-form input:not([type]){font:inherit;padding:13px 14px;border:2px solid #fff;border-radius:10px;color:var(--ink);background:#fff;width:100%}
.lead-form .consent{display:flex;gap:10px;align-items:flex-start;font-weight:400;font-size:.9rem;line-height:1.45}
.lead-form .consent input{width:24px;height:24px;margin-top:2px;flex:0 0 auto}
.hp{position:absolute!important;left:-9999px!important;height:0;width:0;opacity:0}
.form-status{min-height:1.4em;font-weight:700}
.form-status.ok{color:#b7f0c7}.form-status.err{color:#ffd0d0}
.alt-contact{display:flex;gap:10px;flex-wrap:wrap;margin-top:6px}

/* calculators */
.calc{background:var(--card);border:2px solid var(--brand);border-radius:var(--r);padding:20px 22px;margin:1.6em 0}
.calc h2{margin:0 0 10px;font-size:1.3rem;padding:0}
.calc-form{display:grid;gap:12px;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));align-items:end}
.calc-form label{display:grid;gap:5px;font-weight:600;font-size:.93rem}
.calc-form select,.calc-form input{font:inherit;padding:12px;border:2px solid var(--line);border-radius:10px;background:#fff;color:var(--ink);width:100%}
.calc-result{margin-top:14px;font-size:1.05rem}
.calc-result .box{background:var(--ok);border:1px solid #b5dcc0;border-radius:var(--r);padding:14px 18px}
.calc-result .box.warn{background:var(--warn);border-color:var(--warn-line)}
.calc-note{font-size:.84rem;color:var(--muted);margin:12px 0 0}

/* footer */
.site-footer{background:#0b2e38;color:#cfe0e5;margin-top:48px;padding:36px 0;font-size:.9rem;line-height:1.6}
.site-footer a{color:#fff}
.foot{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:28px}
.site-footer ul{list-style:none;padding:0;margin:8px 0 0}.site-footer li{margin:5px 0}
.disc{font-size:.82rem;opacity:.85}

@media (max-width:860px){
  body{font-size:18px}
  .hero{padding:38px 0}.hero h1{font-size:1.75rem}.hero-lead{font-size:1.1rem}
  .menu-btn{display:block}
  .nav{display:none;position:absolute;top:68px;left:0;right:0;background:var(--card);border-bottom:1px solid var(--line);padding:12px 20px;flex-direction:column;align-items:stretch}
  .nav.open{display:flex}.nav a{font-size:1rem;padding:12px}
  .nav .nav-cta{margin:6px 0 0}
  .prose h1{font-size:1.65rem}.prose h2{font-size:1.35rem}
  .foot{grid-template-columns:1fr}
  .lead{padding:20px 18px}
}
/* figures, hero art, card icons, related questions */
.fig{margin:1.6em 0;border:1px solid var(--line);border-radius:var(--r);background:var(--card);padding:10px}
.fig img{display:block;width:100%;height:auto;border-radius:10px}
.fig figcaption{font-size:.85rem;color:var(--muted);padding:8px 6px 2px}
.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:34px;align-items:center}
.hero-art{width:100%;height:auto;border-radius:22px;box-shadow:0 14px 40px rgba(0,0,0,.25)}
.card-icon{display:block;margin-bottom:10px}
.related-q{margin-top:1.6em}
.related-q h2{font-size:1.25rem}
.related-q ul{list-style:none;padding:0;display:grid;gap:8px}
.related-q a{display:block;background:var(--soft);border-radius:10px;padding:10px 14px;text-decoration:none;color:var(--ink);font-size:.97rem;line-height:1.4}
.related-q a:hover{background:#dcecef}
@media (max-width:900px){.hero-grid{grid-template-columns:1fr}.hero-art{max-width:460px;margin:0 auto}}

/* AI assistant */
.pa-fab{position:fixed;right:18px;bottom:18px;z-index:40;display:flex;align-items:center;gap:10px;background:var(--brand);color:#fff;border:0;border-radius:999px;padding:14px 22px 14px 16px;font:inherit;font-weight:700;font-size:1rem;box-shadow:0 8px 26px rgba(15,76,92,.45);cursor:pointer;min-height:52px}
.pa-fab:hover{background:var(--brand-d)}
.pa-fab-ic{display:grid;place-items:center;width:30px;height:30px;border-radius:50%;background:var(--accent);color:var(--ink);font-size:1.1rem;font-weight:800}
.pa-panel{position:fixed;right:18px;bottom:18px;z-index:50;width:390px;max-width:calc(100vw - 24px);height:min(640px,calc(100vh - 36px));display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:0 18px 60px rgba(0,0,0,.35);overflow:hidden;font-size:16px;line-height:1.5}
.pa-panel[hidden]{display:none}
.pa-head{display:flex;justify-content:space-between;align-items:center;background:var(--brand);color:#fff;padding:12px 16px}
.pa-badge{margin-left:8px;background:var(--accent);color:var(--ink);border-radius:6px;padding:1px 7px;font-size:.75rem;font-weight:800}
.pa-close{background:transparent;border:0;color:#fff;font-size:1.8rem;line-height:1;cursor:pointer;width:44px;height:44px}
.pa-note{margin:0;padding:8px 16px;background:var(--soft);color:var(--muted);font-size:.875rem;line-height:1.4}
.pa-log{flex:1;overflow-y:auto;padding:14px 14px 6px;display:flex;flex-direction:column;gap:10px;background:#fbfdfd}
.pa-msg{max-width:92%;padding:10px 14px;border-radius:14px;word-wrap:break-word}
.pa-msg p{margin:0 0 .5em}.pa-msg p:last-child{margin:0}
.pa-msg ul{margin:.3em 0;padding-left:1.2em}
.pa-assistant{background:#eef5f6;align-self:flex-start;border-bottom-left-radius:4px}
.pa-user{background:var(--brand);color:#fff;align-self:flex-end;border-bottom-right-radius:4px}
.pa-typing{opacity:.7;font-style:italic}
.pa-chips{display:flex;flex-wrap:wrap;gap:8px;padding:0 14px 8px}
.pa-chips:empty{display:none}
.pa-chip{background:#fff;border:1.5px solid var(--brand);color:var(--brand);border-radius:999px;padding:8px 14px;font:inherit;font-size:.88rem;cursor:pointer;text-align:left}
.pa-chip:hover{background:var(--soft)}
.pa-form{display:flex;gap:8px;padding:10px 12px;border-top:1px solid var(--line);align-items:flex-end}
.pa-form textarea{flex:1;font:inherit;font-size:16px;padding:10px 12px;border:2px solid var(--line);border-radius:12px;resize:none;color:var(--ink)}
.pa-send{background:var(--accent);color:var(--ink);border:0;border-radius:12px;padding:11px 16px;font:inherit;font-weight:700;cursor:pointer;min-height:44px}
.pa-send:disabled{opacity:.6}
.pa-foot{padding:0 12px 10px;text-align:center}
.pa-lead-open{background:transparent;border:0;color:var(--brand);text-decoration:underline;font:inherit;font-size:.9rem;cursor:pointer;padding:8px}
.pa-pulse{font-weight:700;color:var(--accent-d)}
.pa-lead{border-top:1px solid var(--line);padding:10px 14px 14px;display:grid;gap:8px;max-height:48%;overflow:auto;background:#fff}
.pa-lead[hidden]{display:none}
.pa-lead p{margin:0}
.pa-lead label{display:grid;gap:3px;font-size:.88rem;font-weight:600}
.pa-lead input[type=text],.pa-lead input[type=tel],.pa-lead input:not([type]){font:inherit;font-size:16px;padding:9px 11px;border:2px solid var(--line);border-radius:10px;width:100%}
.pa-consent{display:flex!important;gap:8px;align-items:flex-start;font-weight:400!important;font-size:.82rem!important;line-height:1.4}
.pa-consent input{width:22px;height:22px;margin-top:1px;flex:0 0 auto}
.pa-status{min-height:1.2em;font-weight:700;font-size:.88rem}
.pa-status.ok{color:#1f7a45}.pa-status.err{color:#b3261e}
@media (max-width:600px){
  .pa-panel{right:0;bottom:0;left:0;width:100%;max-width:100%;height:88vh;border-radius:18px 18px 0 0}
  .pa-fab{right:12px;bottom:12px}
  .pa-open body{overflow:hidden}
}
/* label shown briefly on phones, answer-to-form button, calculator next step */
@media (max-width:600px){
  .pa-fab.pa-fab-wide{width:auto;padding:0 18px 0 10px;gap:10px}
  .pa-fab.pa-fab-wide span:last-child{position:static;width:auto;height:auto;clip:auto;overflow:visible}
}
.after-summary{margin:-8px 0 22px}
/* personal photos (illustrations) */
.page-photo{margin:0 0 22px}
.page-photo img{display:block;width:100%;height:auto;aspect-ratio:3/2;object-fit:cover;border-radius:16px;max-height:420px}
.page-photo figcaption{font-size:.8rem;color:var(--muted);padding:6px 4px 0}
.card-photo{display:block;width:100%;height:auto;aspect-ratio:3/2;object-fit:cover;border-radius:10px;margin-bottom:10px}
.hero-art{object-fit:cover}
.expert{display:inline-flex;align-items:center;gap:8px}
.expert-photo{width:40px;height:40px;border-radius:50%;object-fit:cover}
.pa-avatar{width:36px;height:36px;border-radius:50%;vertical-align:middle;margin-right:8px;background:#fff}
/* brand, lead notice, consent */
.brand-name{white-space:nowrap;font-weight:800;letter-spacing:-.01em;color:var(--brand);font-size:1.12rem;line-height:1.1}
.brand-name b{color:var(--accent-d);font-weight:800}
.lead-notice{font-size:.92rem;background:rgba(255,255,255,.1);border-radius:10px;padding:10px 12px;margin:0 0 14px}
.consent-opt{opacity:.95}
.pa-notice{font-size:.82rem;color:var(--muted);margin:0}
.disc a{color:#fff}
.next-step{margin:.6em 0 0;font-size:.95rem}
@media print{.pa-fab,.pa-panel{display:none!important}}

@media print{.site-header,.site-footer,.lead,.related,.nav{display:none}body{font-size:12pt}}

/* ==== UX/a11y audit overrides (see AUDIT_UX.md) ==== */
html{scroll-behavior:smooth}
[id]{scroll-margin-top:88px}/* anchors/TOC/#lead-form no longer hide under the sticky header */
.prose{overflow-wrap:break-word}
.prose a{overflow-wrap:anywhere}
main:focus{outline:0}

/* contrast: outline buttons inside the dark lead box were brand-on-brand (invisible "Позвонить") */
.lead .btn-outline{border-color:#fff;color:#fff}
.lead .btn-outline:hover{background:rgba(255,255,255,.14)}
.lead-form label{font-size:1rem}
.lead-form input[type=text]:not(.hp),.lead-form input[type=tel]{min-height:48px}
.lead-form input:not([type]){min-height:48px}
.lead-form .consent{font-size:.95rem}
.lead-form .consent a{color:#ffd9b0}
.form-status{font-size:1rem}
/* input boundaries must be >=3:1 (WCAG 1.4.11); #dfe5e8 on white was 1.3:1 */
.calc-form select,.calc-form input,.pa-form textarea,.pa-lead input[type=text],.pa-lead input[type=tel],.pa-lead input:not([type]){border-color:#6f7f8a}
.calc-form select,.calc-form input{min-height:48px}

/* breadcrumbs: separator is glued to the previous item so it never starts a wrapped line */
.crumbs li+li::before{content:none}
.crumbs li:not(:last-child)::after{content:"›";margin-left:6px}
.crumbs ol{row-gap:0}
.crumbs a{display:inline-block;padding:8px 2px}
.crumbs li{display:inline-flex;align-items:center}
.crumbs li[aria-current]{padding:8px 0;color:var(--ink)}

/* tables: scroll-shadow hint, zebra, readable header; min width keeps columns from crushing */
.table-wrap{background:linear-gradient(to right,var(--card) 30%,rgba(255,255,255,0)) 0 0/40px 100% no-repeat local,linear-gradient(to left,var(--card) 30%,rgba(255,255,255,0)) 100% 0/40px 100% no-repeat local,linear-gradient(to right,rgba(15,76,92,.2),rgba(15,76,92,0)) 0 0/14px 100% no-repeat scroll,linear-gradient(to left,rgba(15,76,92,.2),rgba(15,76,92,0)) 100% 0/14px 100% no-repeat scroll,var(--card);-webkit-overflow-scrolling:touch}
tbody tr:nth-child(even) td{background:#f7fafb}
th{color:var(--brand-d)}
.table-wrap:focus-visible{outline-offset:-3px}

/* cards, FAQ headings, related questions */
.card{min-height:44px}
.card:hover{color:var(--ink)}
.prose h3[id^=q]{background:var(--soft);border-radius:10px;padding:10px 14px;margin:1.1em 0 .4em;font-size:1.1rem;line-height:1.35}
.related-q a{min-height:44px;display:flex;align-items:center}
.toc a{display:inline-block;padding:4px 0}
.site-footer a{display:inline-block;padding:3px 0}
.meta{font-size:.95rem}

/* lead form: two-column fields in the wide box, button not full-bleed */
@media (min-width:640px){
  .lead-form{grid-template-columns:1fr 1fr;column-gap:16px;max-width:760px}
  .lead-form .consent,.lead-form .form-status,.lead-form .btn{grid-column:1/-1}
  .lead-form .btn{justify-self:start;min-width:280px}
}
.lead .alt-contact{margin-top:14px}
.lead-form .btn{min-height:52px}

/* tablet nav: collapse earlier so 6 links + CTA never wrap into two rows */
@media (max-width:1100px){
  .menu-btn{display:block;min-height:44px}
  .nav{display:none;position:absolute;top:68px;left:0;right:0;background:var(--card);border-bottom:1px solid var(--line);padding:12px 20px;flex-direction:column;align-items:stretch;max-height:calc(100vh - 68px);overflow-y:auto;box-shadow:0 12px 24px rgba(0,0,0,.12)}
  .nav.open{display:flex}
  .nav a{font-size:1.05rem;padding:13px 12px;min-height:48px;display:flex;align-items:center}
  .nav .nav-cta{margin:8px 0 0;justify-content:center}
}

@media (max-width:600px){
  .wrap{padding-left:max(16px,env(safe-area-inset-left));padding-right:max(16px,env(safe-area-inset-right))}
  .calc{padding:16px 14px}
  .calc-form{grid-template-columns:1fr}
  .calc-form .btn{width:100%;min-height:52px}
  .calc-result{font-size:1.1rem}
  .hero-cta .btn{width:100%}
  .alt-contact .btn{flex:1 1 100%}
  .summary{padding:14px 16px}
  th,td{padding:10px 10px}
  .table-wrap table{min-width:440px}/* wide tables scroll sideways with a visible shadow hint */
  .table-wrap table:has(th:nth-child(-n+2):last-child){min-width:0}/* 2-column tables just fit */
  /* chat button: compact icon-only circle so it no longer covers body text; label stays for screen readers */
  .pa-fab{right:max(12px,env(safe-area-inset-right));bottom:max(12px,env(safe-area-inset-bottom));padding:0;width:56px;height:56px;min-height:56px;justify-content:center;gap:0;box-shadow:0 4px 16px rgba(15,76,92,.4)}
  .pa-fab-ic{width:36px;height:36px;font-size:1.3rem}
  .pa-fab span:last-child{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
  .pa-panel{height:88vh;height:88dvh;padding-bottom:env(safe-area-inset-bottom)}
  .site-footer{padding-bottom:calc(36px + 72px + env(safe-area-inset-bottom))}/* last lines stay clear of the chat button */
  .pa-note{font-size:.875rem}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition:none!important;animation:none!important}
  .card:hover{transform:none}
}
@media (prefers-contrast:more){
  :root{--muted:#34424c;--line:#9aa7b0}
}
@media print{
  .menu-btn,.toc,.alt-contact,.hero-cta{display:none}
  body{background:#fff;color:#000}
  a[href^="http"]::after{content:" (" attr(href) ")";font-size:.8em;word-break:break-all}
  .table-wrap{overflow:visible;background:none}
  h2,h3{break-after:avoid}table,.callout,.summary{break-inside:avoid}
}