:root{
  --bg:#0b151d;--bg2:#0e1a24;--card:#14222e;--line:#22333f;
  --red:#e11b1b;--red2:#ff3b30;--steel:#7fa8c4;
  --text:#e9eff4;--muted:#94a8b5;--muted2:#6f8493;
  --r:14px;--maxw:880px;
  --font:'Segoe UI',-apple-system,BlinkMacSystemFont,Roboto,'Helvetica Neue',Arial,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font);background:var(--bg);color:var(--text);line-height:1.65;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
.wrap{max-width:1240px;margin:0 auto;padding:0 24px}
.article{max-width:var(--maxw);margin:0 auto;padding:0 24px}

/* HEADER */
header{position:sticky;top:0;z-index:50;background:rgba(11,21,29,.9);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;gap:24px;height:74px}
.logo img{height:46px;width:auto}
.nav-back{color:#cdd9e1;font-weight:600;font-size:14px}
.nav-back:hover{color:#fff}
.nav-right{margin-left:auto;display:flex;align-items:center;gap:20px}
.nav-phone{font-weight:700;color:#fff;font-size:15px;white-space:nowrap}
.btn{display:inline-flex;align-items:center;gap:8px;background:var(--red);color:#fff;font-weight:700;font-size:15px;padding:13px 24px;border-radius:10px;border:0;cursor:pointer;transition:.18s}
.btn:hover{background:#c81414;transform:translateY(-1px)}
.btn.lg{padding:16px 30px;font-size:16px}

/* HERO */
.case-hero{padding:54px 0 30px;border-bottom:1px solid var(--line)}
.eyebrow{color:var(--red2);font-weight:700;font-size:13px;letter-spacing:.12em;text-transform:uppercase;margin-bottom:16px}
.case-hero h1{font-size:clamp(28px,4vw,42px);line-height:1.15;letter-spacing:-.01em;font-weight:800;max-width:var(--maxw);margin:0 auto;padding:0 24px}
.case-hero .eyebrow{max-width:var(--maxw);margin:0 auto 16px;padding:0 24px}

/* BODY */
.article{padding:44px 24px 20px}
.article h2{font-size:clamp(22px,2.6vw,30px);font-weight:800;letter-spacing:-.01em;margin:38px 0 14px;line-height:1.2}
.article h3{font-size:19px;font-weight:700;margin:26px 0 10px;color:#fff}
.article p{color:#cdd9e1;margin-bottom:16px}
.article ul{margin:0 0 18px;padding-left:4px;list-style:none}
.article li{color:#cdd9e1;padding:6px 0 6px 26px;position:relative}
.article li::before{content:"";position:absolute;left:0;top:14px;width:8px;height:8px;border-radius:2px;background:var(--red)}
.article figure{margin:26px 0}
.article figure img{border-radius:var(--r);border:1px solid var(--line);width:100%}
.article figcaption{color:var(--muted2);font-size:13px;margin-top:8px;text-align:center}
.lead-p{font-size:18px;color:var(--text)!important}
.solution{background:var(--card);border:1px solid var(--line);border-left:3px solid var(--red);border-radius:12px;padding:20px 22px;margin:18px 0}
.solution b{color:#fff}
.result{background:linear-gradient(120deg,#16242f,#0e1a24);border:1px solid var(--line);border-radius:14px;padding:26px 28px;margin:30px 0}
.result h3{margin-top:0}
.facts{display:flex;flex-wrap:wrap;gap:24px;margin:22px 0}
.fact b{display:block;font-size:30px;font-weight:800;color:#fff;line-height:1}
.fact span{color:var(--muted);font-size:13px}

/* CTA */
.case-cta{background:var(--bg2);border-top:1px solid var(--line);margin-top:40px;padding:54px 0}
.case-cta .inner{max-width:var(--maxw);margin:0 auto;padding:0 24px;text-align:center}
.case-cta h2{font-size:28px;font-weight:800;margin-bottom:12px}
.case-cta p{color:var(--muted);max-width:560px;margin:0 auto 24px}

/* FOOTER */
footer{background:#08121a;border-top:1px solid var(--line);padding:36px 0;color:var(--muted);font-size:13px}
.foot{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;align-items:center}
.foot a:hover{color:#fff}

@media(max-width:700px){
  .nav-phone,.nav-back{display:none}
  .case-hero{padding:36px 0 24px}
  .facts{gap:18px}
}

/* ===== Переключатель темы ===== */
.theme-toggle{display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;border-radius:9px;background:transparent;border:1px solid var(--line);color:var(--text);cursor:pointer;flex:0 0 auto;transition:.15s;padding:0}
.theme-toggle:hover{border-color:var(--red);color:var(--red2)}
.theme-toggle svg{width:18px;height:18px}
.theme-toggle .ic-sun{display:none}
[data-theme="light"] .theme-toggle .ic-moon{display:none}
[data-theme="light"] .theme-toggle .ic-sun{display:inline}
/* ===== Светлая тема ===== */
[data-theme="light"]{--bg:#f5f7fa;--bg2:#eaeef3;--card:#ffffff;--line:#dce3ea;--text:#17252f;--muted:#566873;--muted2:#7c8c98;--steel:#2f6ea3}
[data-theme="light"] header{background:rgba(255,255,255,.9)}
[data-theme="light"] .nav-back{color:#33424d}
[data-theme="light"] .nav-back:hover{color:var(--text)}
[data-theme="light"] .nav-phone{color:var(--text)}
[data-theme="light"] .article h3{color:var(--text)}
[data-theme="light"] .article p,[data-theme="light"] .article li{color:#3a4751}
[data-theme="light"] .solution b,[data-theme="light"] .fact b{color:var(--text)}
[data-theme="light"] .result{background:linear-gradient(120deg,#eef2f7,#e3e9ef)}
[data-theme="light"] footer{background:#eaeef3;color:var(--muted)}
[data-theme="light"] .foot a:hover{color:var(--text)}

.site-footer{background:#08121a;border-top:1px solid var(--line);padding:56px 0 26px;color:var(--muted);font-size:14px}
[data-theme="light"] .site-footer{background:#eaeef3}
.sf-top{display:grid;grid-template-columns:1.6fr 1fr 1.2fr 1fr;gap:36px}
.sf-brand img{height:46px;margin-bottom:14px}
.sf-brand p{color:var(--muted);font-size:13.5px;line-height:1.6;margin-bottom:16px;max-width:310px}
.sf-contacts-inline{display:flex;flex-direction:column;gap:5px}
.sf-contacts-inline a{color:var(--text);font-weight:700;font-size:15px}
.sf-contacts-inline a.sf-mail{font-weight:600;font-size:14px;color:var(--steel)}
.sf-contacts-inline a:hover{color:var(--red2)}
.sf-col h4{color:var(--text);font-size:14px;margin-bottom:13px;font-weight:700}
.sf-col a{display:block;color:var(--muted);padding:4px 0;font-size:13.5px;transition:.14s}
.sf-col a:hover{color:var(--text)}
.sf-req{color:var(--muted2);font-size:12.5px;line-height:1.7;margin-top:12px}
.sf-bottom{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;border-top:1px solid var(--line);margin-top:40px;padding-top:20px;font-size:12.5px;color:var(--muted2)}
.sf-bottom a{color:var(--muted2);text-decoration:underline}
.sf-bottom a:hover{color:var(--text)}
@media(max-width:860px){.sf-top{grid-template-columns:1fr 1fr}}
@media(max-width:520px){.sf-top{grid-template-columns:1fr;gap:28px}.sf-bottom{flex-direction:column;gap:8px;text-align:center}}

/* ===== FAQ и SEO-текст (как на основных страницах) ===== */
.faq-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;align-items:start;margin-top:8px}
@media(max-width:760px){.faq-grid{grid-template-columns:1fr;gap:12px}}
.cat-faq{display:flex;flex-direction:column;gap:12px;margin-top:8px}
.faq-grid .cat-faq{margin-top:0}
.cat-faq details{border:1px solid var(--line);border-radius:12px;background:var(--card);overflow:hidden}
.cat-faq summary{list-style:none;cursor:pointer;padding:18px 22px;font-weight:600;font-size:16px;color:var(--text);display:flex;justify-content:space-between;align-items:center;gap:16px;line-height:1.4}
.cat-faq summary::-webkit-details-marker{display:none}
.cat-faq summary::after{content:"+";color:var(--red2);font-size:24px;font-weight:400;line-height:1;flex:0 0 auto;transition:transform .2s}
.cat-faq details[open] summary::after{transform:rotate(45deg)}
.cat-faq details>p{color:var(--muted);font-size:14.5px;line-height:1.6;padding:0 22px 20px;margin:0}
.seo-text{border-top:1px solid var(--line);padding-top:30px;max-width:var(--maxw);margin:0 auto}
.seo-text .seo-lead{color:#b9c7d2;font-size:15.5px;line-height:1.75;margin:0}
[data-theme="light"] .seo-text .seo-lead{color:#3a4751}
.seo-text summary{display:inline-flex;align-items:center;gap:8px;color:var(--red2);font-weight:700;font-size:14px;cursor:pointer;list-style:none;margin-top:16px}
.seo-text summary::-webkit-details-marker{display:none}
.seo-text summary::after{content:"▾";font-size:13px;transition:transform .2s}
.seo-text details[open] summary::after{transform:rotate(180deg)}
.seo-text .seo-body{margin-top:14px}
.seo-text .seo-body p{color:var(--muted);font-size:14.5px;line-height:1.7;margin:0 0 12px}
.seo-text .seo-body h3{font-size:18px;margin:20px 0 8px;color:var(--text)}
.seo-text .seo-body a{color:var(--steel);text-decoration:underline}
.faq-section{max-width:var(--maxw);margin:0 auto;padding:30px 24px 0}
.faq-section .eyebrow{margin-bottom:14px}

/* Таблицы характеристик .spec (были не определены в case.css → таблицы в кейсах ломались) */
.spec{width:100%;border-collapse:collapse;margin:10px 0 8px;background:var(--card);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;display:block;overflow-x:auto;-webkit-overflow-scrolling:touch;max-width:100%}
.spec th,.spec td{text-align:left;padding:14px 18px;border-bottom:1px solid var(--line);font-size:14.5px}
.spec th{color:var(--muted);font-weight:600;width:42%}
.spec td{color:var(--text)}
.spec tr:last-child th,.spec tr:last-child td{border-bottom:0}
.seo-text .seo-body{margin-top:14px}
.seo-text .seo-body p{color:var(--muted);font-size:14.5px;line-height:1.7;margin:0 0 12px}
.seo-text .seo-body h3{font-size:18px;margin:20px 0 8px;color:var(--text)}
.seo-text details[open] summary::after{transform:rotate(180deg)}