/* OverUnity4All · Archimedes overview */
:root{--ink:#152a48;--muted:#526783;--soft:#64758d;--blue:#1266eb;--line:#dce6f2;--bg:#f7faff;--pale:#eef5ff;--max:1190px}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:90px}
body{margin:0;font-family:'Manrope',system-ui,-apple-system,'Segoe UI',Arial,sans-serif;color:var(--ink);background:white;line-height:1.65}
a{color:inherit;text-decoration:none}
a:focus-visible,button:focus-visible{outline:3px solid #ffac33;outline-offset:4px}
.wrap{width:min(var(--max),calc(100% - 56px));margin:auto}
.skip{position:absolute;left:-9999px}.skip:focus{left:16px;top:12px;background:white;padding:10px;z-index:100}
.header{position:sticky;top:0;z-index:60;border-bottom:1px solid var(--line);background:white}
.nav{min-height:76px;display:flex;justify-content:space-between;align-items:center;gap:20px}
.brand{font-size:23px;font-weight:800;letter-spacing:-.9px;white-space:nowrap}
.brand i{color:var(--blue);font-style:normal;font-size:30px;margin-right:8px}
.links{display:flex;align-items:center;gap:29px;font-size:14px;font-weight:600}
.links a:hover,.links a.active{color:var(--blue)}
.menu{display:none;border:1px solid var(--line);border-radius:9px;padding:8px 12px;background:white;font-size:20px;cursor:pointer}
.pagehead{padding:52px 0 34px;background:linear-gradient(120deg,#fff 0%,#f7fbff 100%);border-bottom:1px solid var(--line)}
.eyebrow{font-size:12px;font-weight:800;letter-spacing:2px;color:#5c7caa;margin-bottom:12px;text-transform:uppercase}
h1,h2,h3{margin-top:0;font-weight:800;letter-spacing:-1.5px;line-height:1.14;color:var(--ink)}
.pagehead h1{max-width:840px;font-size:clamp(32px,3.4vw,46px);font-weight:650;line-height:1.17;letter-spacing:-1.4px;margin-bottom:22px}
.lead{font-size:17px;line-height:1.65;color:#3e5471;max-width:720px;margin-bottom:20px}
.actions{display:flex;gap:12px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:11px 19px;border:1px solid #c9d8ec;border-radius:9px;font-size:14px;font-weight:750;background:white}
.btn:hover{border-color:var(--blue);color:var(--blue)}
.btn.primary{background:var(--blue);color:white;border-color:var(--blue)}
.btn.primary:hover{background:#0753c9}
.section{padding:56px 0}
.section h1{font-size:clamp(24px,2.6vw,32px);font-weight:700;margin-bottom:16px}.section h2{font-size:clamp(24px,2.6vw,32px);font-weight:700;margin-bottom:16px}
.section p{color:#3e5471;max-width:720px;margin:0 0 16px}
.section strong{color:var(--ink);font-weight:700}
.split{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr);gap:clamp(28px,4vw,56px);align-items:center}
.flow{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin-top:20px}
.step{background:#f3f8ff;border:1px solid #dce9f8;border-radius:8px;padding:9px 13px;font-weight:700;font-size:13px;color:var(--ink)}
.arrow{color:#7f9bbd}
.figure{margin:0}
.figure a{display:block;cursor:zoom-in;overflow:hidden;border-radius:12px;border:1px solid var(--line)}
.figure a img{display:block;width:100%;height:auto;transition:transform .25s ease}
.figure a:hover img{transform:scale(1.015)}
.figure figcaption{font-size:13px;color:var(--muted);margin-top:10px;line-height:1.5}
.figure .fnum{font-weight:700;color:var(--blue);margin-right:6px}
.zoom-hint{color:var(--blue);font-weight:600}
.stack{border:1px solid var(--line);border-radius:12px;overflow:hidden;margin-top:8px}
.stack-row{display:grid;grid-template-columns:200px minmax(0,1fr);gap:16px;padding:13px 18px;border-bottom:1px solid var(--line)}
.stack-row:last-child{border-bottom:0}
.stack-row .k{font-size:13px;font-weight:700;color:var(--muted);padding-top:2px}
.stack-row .v{font-size:15px;color:var(--ink);overflow-wrap:anywhere}
.stack-row .v a{color:var(--blue);font-weight:700}
.stack-row .v a:hover{text-decoration:underline}
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:8px}
.card{border:1px solid var(--line);border-radius:14px;padding:22px;background:white}
.card .symbol{color:var(--blue);font-size:26px}
.card h3{font-size:17px;font-weight:700;margin:10px 0 6px;letter-spacing:-.3px}
.card p{font-size:14px;color:var(--muted);margin:0}
.photo-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:8px}
.photo-link{display:block;cursor:zoom-in}
.photo{display:block;width:100%;height:auto;border-radius:14px;box-shadow:0 16px 35px rgba(32,64,109,.10);background:#dce8f4}.photo--sm{max-width:340px;margin-inline:auto}
.note{padding:16px 18px;background:var(--bg);border:1px solid var(--line);border-radius:12px;color:var(--muted);font-size:15px;margin:8px 0 40px}
.note a{color:var(--blue);font-weight:700}
footer{background:#142744;color:#dce7f8;padding:30px 0;font-size:13px}
footer .wrap{display:flex;justify-content:space-between;gap:15px;flex-wrap:wrap}
footer a{color:#fff}
@media(max-width:980px){.split{grid-template-columns:1fr}.cards,.photo-grid{grid-template-columns:1fr}}
@media(max-width:900px){.nav{min-height:64px}.menu{display:block}.links{display:none;position:absolute;top:64px;left:0;right:0;background:#fff;z-index:5;padding:16px 22px;box-shadow:0 14px 25px #14274418;flex-direction:column;align-items:flex-start;max-height:calc(100dvh - 64px);overflow-y:auto}.links.open{display:flex}}
@media(max-width:700px){.wrap{width:calc(100% - 34px)}.brand{font-size:21px}.pagehead{padding:38px 0 26px}.section{padding:40px 0}.pagehead h1{letter-spacing:-1px}.stack-row{grid-template-columns:1fr;gap:2px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.figure a img{transition:none}.figure a:hover img{transform:none}}

/* AI experiment video */

.ai-demo-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
  gap: 32px;
  align-items: center;
  margin-top: 24px;
}

.ai-demo-text {
  min-width: 0;
}

.ai-demo-text p {
  margin: 0 0 16px;
  line-height: 1.7;
}

.ai-demo-text strong {
  font-weight: 750;
}

.ai-demo-media {
  min-width: 0;
}

.ai-demo-media video {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: contain;
  border-radius: 12px;
  background: #10151e;
}

.ai-demo-link {
  display: inline-block;
  margin-top: 8px;
  font-weight: 700;
  text-decoration: none;
}

.ai-demo-link:hover {
  text-decoration: underline;
}

@media (max-width: 760px) {
  .ai-demo-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
}

/* Video block (figure-box) */
.figure-box{margin:25px 0 29px;padding:14px;border:1px solid var(--line);border-radius:13px;background:#fff;text-align:center}
.figure-box img{max-width:100%;height:auto;display:block;margin:auto;border-radius:7px}
.figure-caption{font-size:12px!important;line-height:1.6;color:var(--muted)!important;margin:12px auto 2px!important}
video{max-width:100%;border-radius:10px}
.figure-box p{margin-left:auto;margin-right:auto}

/* OverUnity4All — логотип сайта */
.site-logo {
    display: inline-flex;
    align-items: center;
    flex-shrink: 0;
    text-decoration: none;
}
.site-logo img {
    display: block;
    width: auto;
    height: 42px;
    max-width: 100%;
}
@media (max-width: 768px) {
    .site-logo img {
        height: 32px;
    }
}