/* keen-pbr-sb — сайт проекта */

@font-face{font-family:Roboto;font-style:normal;font-weight:400;font-display:swap;
  src:url(fonts/roboto-cyrillic-400-normal.woff2) format('woff2');
  unicode-range:U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116}
@font-face{font-family:Roboto;font-style:normal;font-weight:400;font-display:swap;
  src:url(fonts/roboto-latin-400-normal.woff2) format('woff2');
  unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+2000-206F,U+2074,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215}
@font-face{font-family:Roboto;font-style:normal;font-weight:500;font-display:swap;
  src:url(fonts/roboto-cyrillic-500-normal.woff2) format('woff2');
  unicode-range:U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116}
@font-face{font-family:Roboto;font-style:normal;font-weight:500;font-display:swap;
  src:url(fonts/roboto-latin-500-normal.woff2) format('woff2');
  unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+2000-206F,U+2074,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215}
@font-face{font-family:Roboto;font-style:normal;font-weight:700;font-display:swap;
  src:url(fonts/roboto-cyrillic-700-normal.woff2) format('woff2');
  unicode-range:U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116}
@font-face{font-family:Roboto;font-style:normal;font-weight:700;font-display:swap;
  src:url(fonts/roboto-latin-700-normal.woff2) format('woff2');
  unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+2000-206F,U+2074,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215}

:root{
  --brand:#0086cb; --brand-dk:#0069a1; --brand-lt:#e8f4fc;
  --bg:#ffffff; --bg-alt:#f5f8fa; --bg-card:#ffffff;
  --fg:#12232e; --fg-muted:#5a6b78; --fg-faint:#8494a1;
  --line:#e3e9ee; --line-strong:#cfd8e0;
  --ok:#1a8754; --ok-bg:#e7f5ee; --warn:#b5711a; --warn-bg:#fdf3e4;
  --shadow:0 1px 2px rgba(18,35,46,.06),0 8px 24px rgba(18,35,46,.06);
  --shadow-lg:0 4px 12px rgba(18,35,46,.08),0 24px 64px rgba(18,35,46,.12);
  --radius:14px; --maxw:1180px;
}
html[data-theme=dark]{
  --brand:#3aa7e8; --brand-dk:#66bcef; --brand-lt:#12293a;
  --bg:#0f1720; --bg-alt:#141d28; --bg-card:#18222e;
  --fg:#e7eef5; --fg-muted:#9fb0bf; --fg-faint:#77899a;
  --line:#243140; --line-strong:#33445a;
  --ok:#4ec98a; --ok-bg:#122c21; --warn:#e0a95c; --warn-bg:#2c2213;
  --shadow:0 1px 2px rgba(0,0,0,.4),0 8px 24px rgba(0,0,0,.3);
  --shadow-lg:0 4px 12px rgba(0,0,0,.5),0 24px 64px rgba(0,0,0,.45);
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:80px}
body{
  margin:0;font-family:Roboto,-apple-system,BlinkMacSystemFont,'Segoe UI',Arial,sans-serif;
  background:var(--bg);color:var(--fg);line-height:1.6;-webkit-font-smoothing:antialiased;
  font-size:17px;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3,h4{line-height:1.22;margin:0 0 .5em;letter-spacing:-.015em}
h2{font-size:clamp(28px,3.6vw,40px);font-weight:700}
h3{font-size:20px;font-weight:500}
p{margin:0 0 1em}
code,kbd{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.92em}

.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.section{padding:84px 0;border-top:1px solid var(--line)}
.section--alt{background:var(--bg-alt)}
.section__head{max-width:760px;margin-bottom:44px}
.section__head p{color:var(--fg-muted);font-size:19px;margin:0}
.eyebrow{
  display:inline-block;font-size:13px;font-weight:700;letter-spacing:.09em;
  text-transform:uppercase;color:var(--brand);margin-bottom:12px
}

/* ── шапка ─────────────────────────────────────────── */
.hdr{
  position:sticky;top:0;z-index:50;background:color-mix(in srgb,var(--bg) 88%,transparent);
  backdrop-filter:saturate(160%) blur(12px);border-bottom:1px solid var(--line)
}
.hdr__in{display:flex;align-items:center;gap:20px;height:64px;max-width:var(--maxw);margin:0 auto;padding:0 24px}
.brand{display:flex;align-items:center;gap:11px;font-weight:700;font-size:18px;color:var(--fg);letter-spacing:-.01em}
.brand:hover{text-decoration:none}
.brand img{width:32px;height:32px;border-radius:8px}
.brand span b{color:var(--brand)}
.nav{display:flex;gap:26px;margin-left:auto;font-size:15px}
.nav a{color:var(--fg-muted);font-weight:500}
.nav a:hover{color:var(--brand);text-decoration:none}
.hdr__act{display:flex;align-items:center;gap:10px}
.iconbtn{
  display:grid;place-items:center;width:38px;height:38px;border-radius:10px;
  border:1px solid var(--line);background:var(--bg-card);color:var(--fg-muted);cursor:pointer
}
.iconbtn:hover{color:var(--brand);border-color:var(--brand)}
.burger{display:none}

/* ── кнопки ────────────────────────────────────────── */
.btn{
  display:inline-flex;align-items:center;gap:9px;padding:12px 22px;border-radius:11px;
  font-weight:500;font-size:16px;border:1px solid transparent;cursor:pointer;transition:.15s
}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn--primary{background:var(--brand);color:#fff;box-shadow:0 4px 14px rgba(0,134,203,.28)}
.btn--primary:hover{background:var(--brand-dk)}
.btn--ghost{background:var(--bg-card);color:var(--fg);border-color:var(--line-strong)}
.btn--ghost:hover{border-color:var(--brand);color:var(--brand)}

/* ── герой ─────────────────────────────────────────── */
.hero{position:relative;overflow:hidden;padding:76px 0 0}
.hero::before{
  content:'';position:absolute;inset:-40% 0 auto;height:760px;z-index:-1;
  background:radial-gradient(60% 60% at 50% 40%,color-mix(in srgb,var(--brand) 16%,transparent),transparent 70%)
}
.hero__grid{max-width:880px;margin:0 auto;text-align:center}
.hero h1{font-size:clamp(34px,5vw,58px);font-weight:700;margin-inline:auto;max-width:22ch}
.hero__lead{font-size:20px;color:var(--fg-muted);max-width:66ch;margin-inline:auto}
.hero__cta{display:flex;flex-wrap:wrap;gap:12px;margin:30px 0 22px;justify-content:center}
.hero .badges{justify-content:center}
.badges{display:flex;flex-wrap:wrap;gap:8px}
.badge{
  display:inline-flex;align-items:center;gap:6px;padding:5px 11px;border-radius:999px;
  background:var(--bg-alt);border:1px solid var(--line);font-size:13px;color:var(--fg-muted);font-weight:500
}
.badge--ok{background:var(--ok-bg);border-color:transparent;color:var(--ok)}
.badge--brand{background:var(--brand-lt);border-color:transparent;color:var(--brand-dk)}
.badge--warn{background:var(--warn-bg);border-color:transparent;color:var(--warn)}
.hero__shot{
  margin-top:56px;border-radius:var(--radius);overflow:hidden;cursor:zoom-in;
  border:1px solid var(--line);box-shadow:var(--shadow-lg)
}

/* ── карточки возможностей ─────────────────────────── */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,316px),1fr));gap:20px}
.card{
  background:var(--bg-card);border:1px solid var(--line);border-radius:var(--radius);
  padding:26px;transition:.18s
}
.card:hover{border-color:color-mix(in srgb,var(--brand) 40%,var(--line));box-shadow:var(--shadow);transform:translateY(-2px)}
.card__ico{
  width:42px;height:42px;border-radius:11px;display:grid;place-items:center;
  background:var(--brand-lt);color:var(--brand);margin-bottom:16px
}
.card h3{margin-bottom:8px}
.card p{color:var(--fg-muted);font-size:15.5px;margin:0}
.card--wide{grid-column:span 2}
@media(max-width:860px){.card--wide{grid-column:span 1}}

/* ── подробный список ──────────────────────────────── */
.more{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:12px 34px;margin-top:34px}
.more div{display:flex;gap:11px;font-size:15.5px;color:var(--fg-muted);align-items:flex-start}
.more svg{flex:none;margin-top:4px;color:var(--brand)}
.more b{color:var(--fg);font-weight:500}

/* ── схема ─────────────────────────────────────────── */
.diagram{
  background:var(--bg-card);border:1px solid var(--line);border-radius:var(--radius);
  padding:32px;overflow-x:auto
}
.diagram svg{min-width:680px;margin:0 auto}

/* ── галерея ───────────────────────────────────────── */
.tabs{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:22px}
.tab{
  padding:9px 17px;border-radius:10px;border:1px solid var(--line);background:var(--bg-card);
  color:var(--fg-muted);font:inherit;font-size:15px;font-weight:500;cursor:pointer;transition:.15s
}
.tab:hover{border-color:var(--brand);color:var(--brand)}
.tab[aria-selected=true]{background:var(--brand);border-color:var(--brand);color:#fff}
.shot{
  border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
  box-shadow:var(--shadow);background:var(--bg-card);cursor:zoom-in
}
.shot img{width:100%}
.shot figcaption{padding:14px 18px;font-size:15px;color:var(--fg-muted);border-top:1px solid var(--line)}
.shot figcaption b{color:var(--fg);font-weight:500}
.panel[hidden]{display:none}

/* ── лайтбокс ──────────────────────────────────────── */
.lb{
  position:fixed;inset:0;z-index:100;background:rgba(6,14,20,.9);display:grid;place-items:center;
  padding:32px;cursor:zoom-out
}
.lb[hidden]{display:none}
.lb img{max-width:min(1600px,96vw);max-height:92vh;border-radius:10px;box-shadow:0 30px 90px rgba(0,0,0,.6)}
.lb__close{position:absolute;top:20px;right:24px;color:#fff;background:none;border:0;font-size:34px;cursor:pointer;line-height:1}

/* ── цифры ─────────────────────────────────────────── */
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:20px}
.stat{background:var(--bg-card);border:1px solid var(--line);border-radius:var(--radius);padding:24px}
.stat b{display:block;font-size:34px;font-weight:700;color:var(--brand);line-height:1.15;letter-spacing:-.02em}
.stat span{font-size:15px;color:var(--fg-muted)}

/* ── установка ─────────────────────────────────────── */
.term{
  background:#0c1720;border:1px solid #1e2c39;border-radius:var(--radius);overflow:hidden;
  box-shadow:var(--shadow);margin-bottom:16px
}
.term__bar{display:flex;align-items:center;gap:8px;padding:11px 16px;border-bottom:1px solid #1e2c39}
.term__dot{width:11px;height:11px;border-radius:50%}
.term__ttl{margin-left:8px;color:#7d93a6;font-size:13.5px}
.term__copy{
  margin-left:auto;background:#182635;border:1px solid #24384a;color:#9fb6c9;
  border-radius:8px;padding:5px 12px;font:inherit;font-size:13px;cursor:pointer
}
.term__copy:hover{color:#fff;border-color:#3a566f}
.term pre{margin:0;padding:20px 18px;overflow-x:auto;color:#d7e6f2;font-size:14.5px;line-height:1.7}
.term .p{color:#4ec98a}
.term .c{color:#6c8298}
.steps{counter-reset:s;display:grid;gap:16px;margin-top:8px}
.step{display:flex;gap:16px;align-items:flex-start}
.step::before{
  counter-increment:s;content:counter(s);flex:none;width:30px;height:30px;border-radius:9px;
  background:var(--brand-lt);color:var(--brand);font-weight:700;font-size:15px;display:grid;place-items:center
}
.step p{margin:2px 0 0;color:var(--fg-muted);font-size:15.5px}
.step b{color:var(--fg);font-weight:500}

/* ── честно / ограничения ──────────────────────────── */
.notes{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:18px}
.note{border-left:3px solid var(--line-strong);padding:2px 0 2px 18px}
.note h3{font-size:17px;margin-bottom:6px}
.note p{color:var(--fg-muted);font-size:15.5px;margin:0}

/* ── подвал ────────────────────────────────────────── */
.ftr{border-top:1px solid var(--line);padding:52px 0 40px;background:var(--bg-alt)}
.ftr__grid{display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:36px}
.ftr h4{font-size:14px;text-transform:uppercase;letter-spacing:.07em;color:var(--fg-faint);margin-bottom:14px}
.ftr ul{list-style:none;margin:0;padding:0;display:grid;gap:9px;font-size:15px}
.ftr p{color:var(--fg-muted);font-size:15px;max-width:44ch}
.ftr__bottom{
  margin-top:36px;padding-top:22px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;color:var(--fg-faint);font-size:14px
}
@media(max-width:820px){.ftr__grid{grid-template-columns:1fr}}

@media(max-width:760px){
  body{font-size:16px}
  .section{padding:60px 0}
  .nav{display:none}
  .nav.open{
    display:flex;flex-direction:column;position:absolute;top:64px;left:0;right:0;
    background:var(--bg);border-bottom:1px solid var(--line);padding:18px 24px;gap:16px
  }
  .burger{display:grid}
  .hero{padding-top:48px}
  .hero__shot{margin-top:36px}
}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto}}