:root{
  --ink:#12172A;
  --ink-2:#1A2036;
  --paper:#F5F6F8;
  --white:#FFFFFF;
  --line:#E2E4EA;
  --line-dark:rgba(255,255,255,.14);
  --text:#12172A;
  --text-soft:#4A5168;
  --text-muted:#6E7488;
  --on-dark:#FFFFFF;
  --on-dark-soft:#C7CCDE;
  --on-dark-muted:#8992AA;
  --accent:#1B3AA2;
  --accent-2:#10245E;
  --accent-light:#2947C4;
  --accent-tint:#EAEEFB;
  --accent-on-dark:#9DB2F7;
  --radius:16px;
  --shadow-soft:0 20px 40px -24px rgba(18,23,42,.28);
}
*,*::before,*::after{box-sizing:border-box;}
[hidden]{display:none !important;}
html{scroll-behavior:smooth;}
[id]{scroll-margin-top:84px;}
body{
  margin:0;
  background:var(--white);
  color:var(--text);
  font-family:'Manrope',system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block;}
h1,h2,h3,h4{font-family:'Golos Text',system-ui,sans-serif;margin:0;text-wrap:balance;color:inherit;}
p{margin:0;}
a{color:inherit;}
button{font:inherit;cursor:pointer;}
ul{margin:0;padding:0;list-style:none;}
.mono{font-family:'JetBrains Mono',ui-monospace,monospace;font-variant-numeric:tabular-nums;}

.container{width:100%;max-width:1280px;margin-inline:auto;padding-inline:24px;}
.section{padding-block:88px;}
@media (max-width:720px){.section{padding-block:56px;}}
/* tightens the join between sections that continue one topic (e.g. the
   Услуги cluster) instead of starting a new one — groups them visually
   without a separate wrapper section */
.section--sub{padding-top:40px;}
@media (max-width:720px){.section--sub{padding-top:28px;}}
.section--light{background:var(--paper);color:var(--text);}
.section--dark{background:var(--ink);color:var(--on-dark);}

.eyebrow{
  font-family:'JetBrains Mono',monospace;font-size:12px;font-weight:600;
  letter-spacing:.14em;text-transform:uppercase;color:var(--accent);
  display:flex;align-items:center;gap:8px;margin-bottom:16px;
}
.section--dark .eyebrow,.card-dark .eyebrow{color:var(--accent-on-dark);}
.eyebrow::before{content:'';width:16px;height:1.5px;background:currentColor;display:inline-block;}

h2.h-section{font-size:clamp(24px,3.6vw,40px);font-weight:700;line-height:1.16;max-width:22ch;}
.lede{font-size:16.5px;color:var(--text-soft);max-width:62ch;margin-top:16px;}
.section--dark .lede{color:var(--on-dark-soft);}

.btn{
  display:inline-flex;align-items:center;gap:8px;border-radius:999px;
  font-family:'Manrope',sans-serif;font-weight:700;font-size:14.5px;
  padding:14px 26px;border:1.5px solid transparent;text-decoration:none;
  transition:transform .18s ease, background .18s ease, border-color .18s ease;
  white-space:nowrap;
}
.btn:hover{transform:translateY(-1px);}
.btn:active{transform:translateY(0) scale(.98);}
.btn-primary{background:var(--accent);color:#fff;}
.btn-primary:hover{background:var(--accent-light);}
.btn-ghost-dark{border-color:rgba(255,255,255,.4);color:#fff;}
.btn-ghost-dark:hover{border-color:#fff;}

.chip{
  font-family:'JetBrains Mono',monospace;font-size:12.5px;font-weight:600;
  background:var(--accent-tint);color:var(--accent-2);border-radius:8px;padding:8px 12px;
  display:inline-flex;align-items:center;gap:6px;
  max-width:100%;overflow-wrap:break-word;
}

.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;}
.card h3,.card h4{font-size:17px;font-weight:700;margin-bottom:10px;}
.card p{color:var(--text-soft);font-size:14.5px;}

.card-dark{
  background:var(--ink);color:var(--on-dark);
  border:1px solid rgba(255,255,255,.08);border-radius:var(--radius);padding:26px;
  box-shadow:0 24px 48px -30px rgba(18,23,42,.4);
}
.card-dark h3,.card-dark h4{color:#fff;font-size:17px;font-weight:700;margin-bottom:10px;}
.card-dark p{color:var(--on-dark-soft);font-size:14.5px;}

.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px;}
.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;}
.grid-4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:22px;}
@media (max-width:900px){.grid-3,.grid-4{grid-template-columns:repeat(2,minmax(0,1fr));}}
@media (max-width:640px){.grid-2,.grid-3,.grid-4{grid-template-columns:1fr;}}

.placeholder-media{
  background:repeating-linear-gradient(135deg, var(--paper) 0 10px, #ECEEF2 10px 20px);
  border:1px dashed var(--line);border-radius:calc(var(--radius) - 4px);
  display:flex;align-items:center;justify-content:center;text-align:center;
  color:var(--text-muted);font-family:'JetBrains Mono',monospace;font-size:12px;
  padding:16px;min-height:160px;
}

/* nav */
.nav{
  position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.nav-row{display:flex;align-items:center;justify-content:space-between;gap:16px;padding-block:14px;}
.brand{display:flex;align-items:center;gap:14px;text-decoration:none;color:var(--ink);min-width:0;}
.brand-logo{flex:none;height:52px;width:auto;}
.brand-text{
  font-family:'JetBrains Mono',monospace;font-size:11px;line-height:1.4;
  color:var(--text-muted);letter-spacing:.02em;max-width:20ch;
  overflow-wrap:break-word;flex:none;
}
.nav-links{display:flex;gap:22px;align-items:center;flex-wrap:nowrap;}
.nav-links a{font-size:14px;font-weight:600;text-decoration:none;color:var(--text-soft);white-space:nowrap;}
.nav-links a:hover{color:var(--accent);}
.nav-actions{display:flex;align-items:center;gap:14px;flex:none;}
.nav-burger{display:none;background:none;border:none;padding:6px;flex:none;}
.nav-burger span{display:block;width:22px;height:2px;background:var(--ink);margin:5px 0;border-radius:2px;transition:transform .2s ease, opacity .2s ease;}
.nav-burger.open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-burger.open span:nth-child(2){opacity:0;}
.nav-burger.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}
@media (max-width:900px){
  .nav-links{display:none;}
  .nav-actions .btn{display:none;}
  .nav-burger{display:block;}
  .brand-text{display:none;}
}
@media (min-width:901px) and (max-width:1180px){.brand-text{display:none;}}
.mobile-panel{
  display:flex;flex-direction:column;gap:2px;overflow:hidden;
  max-height:0;opacity:0;padding:0;border-top:1px solid transparent;
  transform:translateY(-6px);
  visibility:hidden;
  transition:max-height .38s cubic-bezier(.32,.72,0,1), opacity .26s ease, transform .32s cubic-bezier(.32,.72,0,1), padding .38s cubic-bezier(.32,.72,0,1), border-color .26s ease, visibility 0s linear .38s;
}
.mobile-panel.open{
  max-height:520px;opacity:1;padding:8px 0 18px;border-top-color:var(--line);
  transform:translateY(0);
  visibility:visible;
  transition:max-height .38s cubic-bezier(.32,.72,0,1), opacity .26s ease, transform .32s cubic-bezier(.32,.72,0,1), padding .38s cubic-bezier(.32,.72,0,1), border-color .26s ease, visibility 0s linear 0s;
}
.mobile-panel.no-anim{transition:none;}
.mobile-panel a{padding:12px 4px;font-weight:600;font-size:15px;text-decoration:none;color:var(--text);border-bottom:1px solid var(--line);flex:none;}
.mobile-panel .btn{margin-top:12px;justify-content:center;}
.mobile-panel a.btn-primary{color:#fff;border-bottom:none;}

footer{background:var(--ink-2);color:var(--on-dark-muted);padding-block:36px;}
.footer-row{display:flex;justify-content:space-between;flex-wrap:wrap;gap:20px;font-size:13px;}
.footer-row b{color:#fff;font-weight:600;}
.footer-links{display:flex;gap:20px;flex-wrap:wrap;}
.footer-links a{text-decoration:none;color:var(--on-dark-muted);font-size:13px;}
.footer-links a:hover{color:#fff;}

@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{animation-duration:.001ms !important;animation-delay:0ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;scroll-behavior:auto !important;}
}

/* HERO */
.hero{
  background:
    linear-gradient(100deg,rgba(14,18,32,.7) 0%,rgba(14,18,32,.42) 42%,rgba(14,18,32,.15) 65%),
    linear-gradient(rgba(12,16,30,.28),rgba(12,16,30,.28)),
    url('../img/hero-bg.jpg?v=5') center center/cover no-repeat,
    #1A2036;
  position:relative;overflow:hidden;padding-block:96px 72px;
  min-height:100vh;display:flex;flex-direction:column;justify-content:center;
}
.hero .container{max-width:1440px;}
.hero-inner{position:relative;max-width:720px;transform:translateY(-42px);}
.hero h1{font-size:clamp(32px,6vw,60px);font-weight:700;line-height:1.14;color:#fff;max-width:19ch;}
.hero-meta{margin-top:14px;font-size:13px;color:rgba(255,255,255,.6);}

/* directions */
.check-list{display:flex;flex-direction:column;gap:12px;margin-top:6px;}
.check-list li{
  position:relative;padding-left:26px;font-size:14.5px;color:var(--text-soft);line-height:1.5;
}
.check-list li::before{
  content:'';position:absolute;left:0;top:5px;width:14px;height:14px;border-radius:4px;
  background:var(--accent-tint);border:1px solid var(--accent);
}

/* timeline: numbered cards that fade/slide in staggered, not enalt's
   drawn-line-plus-popping-circle mechanic */
.timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:40px;}
/* visible by default (no JS needed); .drawn (below) replays a one-time
   staggered fade/slide-up via animation-fill-mode:both, same safe pattern
   as enalt's market-chart bars */
.tl-step{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:22px 20px;
}
.tl-n{font-size:26px;font-weight:700;color:var(--accent);margin-bottom:10px;}
.tl-step h4{font-size:14.5px;font-weight:700;margin-bottom:6px;}
.tl-step p{font-size:12.5px;color:var(--text-muted);}

/* .timeline--js is added by JS as soon as it runs (before the observer ever
   fires), so cards start hidden immediately on load; without JS this class
   never appears and cards stay visible per the no-JS-safe default above */
.timeline--js .tl-step{opacity:0;transform:translateY(14px);}

.timeline.drawn .tl-step{
  animation:tlIn .5s cubic-bezier(.32,.72,0,1) both;
  animation-delay:calc(var(--i) * 130ms);
}
@keyframes tlIn{from{opacity:0;transform:translateY(14px);}to{opacity:1;transform:translateY(0);}}

@media (max-width:900px){.timeline{grid-template-columns:repeat(2,1fr);}}
@media (max-width:460px){.timeline{grid-template-columns:1fr;}}

/* small screenshot gallery row (Octopus extra views) */
.shot-row{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin-top:14px;}
.shot-row img{border-radius:calc(var(--radius) - 4px);border:1px solid rgba(255,255,255,.1);}
@media (max-width:520px){.shot-row{grid-template-columns:1fr;}}

/* equipment tabs: underline indicator, not enalt's filled-pill/dark-active style */
.tabs-head{display:flex;gap:28px;flex-wrap:wrap;margin-bottom:28px;border-bottom:1px solid var(--line);}
.tab-btn{
  background:none;border:none;border-bottom:2.5px solid transparent;border-radius:0;
  padding:0 0 12px;margin-bottom:-1px;
  font-weight:700;font-size:13.5px;color:var(--text-muted);
}
.tab-btn.active{color:var(--ink);border-bottom-color:var(--accent);}
.tab-panel{display:none;}
.tab-panel.active{display:grid;grid-template-columns:1.05fr .95fr;gap:32px;align-items:start;animation:tabIn .4s cubic-bezier(.32,.72,0,1);}
@keyframes tabIn{from{opacity:0;transform:translateY(8px);}to{opacity:1;transform:translateY(0);}}
@media (max-width:800px){.tab-panel.active{grid-template-columns:1fr;}}
.tab-media{aspect-ratio:16/10;border-radius:var(--radius);overflow:hidden;}
.tab-media img{width:100%;height:100%;object-fit:cover;}
.tab-specs h3{font-size:20px;font-weight:700;margin-bottom:14px;}
.spec-chip-list{display:flex;flex-direction:column;gap:10px;margin-top:14px;}
.spec-chip{display:flex;gap:10px;align-items:flex-start;font-size:14px;color:var(--text-soft);background:var(--paper);border-radius:10px;padding:12px 14px;flex-wrap:wrap;}
.spec-chip b{font-family:'JetBrains Mono',monospace;color:var(--accent-2);font-weight:600;font-size:13px;white-space:nowrap;}

/* instruments */
.instrument-card{display:flex;flex-direction:column;gap:14px;}
.instrument-media{aspect-ratio:4/3;font-size:11px;}
.instrument-media--photo{background:#fff;border:1px solid var(--line);border-radius:calc(var(--radius) - 4px);display:flex;align-items:center;justify-content:center;overflow:hidden;padding:10px;}
.instrument-media--photo img{width:100%;height:100%;object-fit:contain;}

/* case */
.case-panel{padding:40px;}
@media (max-width:640px){.case-panel{padding:26px;}}
.case-media{border-radius:12px;overflow:hidden;border:1px solid rgba(255,255,255,.1);}
.case-media img{width:100%;height:100%;object-fit:cover;}
.case-stats{display:flex;gap:32px;flex-wrap:wrap;margin-top:32px;padding-top:24px;border-top:1px solid var(--line-dark);}
.case-stat{border:1px solid var(--line-dark);border-radius:12px;padding:14px 18px;background:rgba(255,255,255,.03);}
.case-stat .v{font-family:'JetBrains Mono',monospace;font-weight:700;font-size:22px;color:#fff;}
.case-stat .l{font-size:13px;color:var(--on-dark-soft);margin-top:2px;max-width:26ch;}

/* contacts */
.contact-panel{
  margin-top:48px;border-top:1px solid var(--line-dark);padding-top:40px;
  display:grid;grid-template-columns:1fr auto;gap:24px;align-items:center;
}
@media (max-width:720px){.contact-panel{grid-template-columns:1fr;}.contact-panel .btn{width:100%;justify-content:center;}}
.contact-panel h3{font-size:21px;font-weight:700;color:#fff;}
.contact-panel p{color:var(--on-dark-soft);margin-top:8px;font-size:14px;}
.contact-actions{display:flex;flex-direction:column;gap:10px;align-items:flex-end;}
@media (max-width:720px){.contact-actions{align-items:stretch;}}

/* hull viewer (Octopus 3D model) */
.octopus-grid{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr);gap:32px;align-items:start;}
@media (max-width:900px){.octopus-grid{grid-template-columns:minmax(0,1fr);}}
.hull-viewer-canvas{
  width:100%;aspect-ratio:4/3;max-height:380px;min-height:200px;border-radius:var(--radius);overflow:hidden;
  background:#11162A;display:flex;align-items:center;justify-content:center;position:relative;
}
.hull-viewer-canvas canvas{display:block;width:100%;height:100%;}
.hull-viewer-hint{
  position:absolute;left:50%;bottom:14px;transform:translateX(-50%);
  display:flex;align-items:center;gap:6px;
  background:rgba(17,22,42,.78);color:#fff;font-size:12px;font-weight:600;
  padding:8px 14px;border-radius:999px;pointer-events:none;
  transition:opacity .4s ease;white-space:nowrap;
}
.hull-viewer-hint.hull-viewer-hint--hidden{opacity:0;}
.hull-viewer-caption{font-size:12.5px;color:var(--on-dark-soft);}

/* split-columns: plain two-column comparison, no card boxes — a neutral
   hairline divider (not a colored accent) separates the columns */
.split-columns{display:grid;grid-template-columns:1fr 1fr;gap:48px;}
.split-columns > div + div{border-left:1px solid var(--line);padding-left:48px;}
.split-columns h3{font-size:18px;font-weight:700;margin-bottom:14px;}
@media (max-width:640px){
  .split-columns{grid-template-columns:1fr;gap:0;}
  .split-columns > div{padding-block:28px;}
  .split-columns > div:first-child{padding-top:0;}
  .split-columns > div + div{border-left:none;padding-left:0;border-top:1px solid var(--line);}
}

/* plain-list: stacked rows separated by hairline dividers, no card boxes */
.plain-list > div{padding-block:22px;border-top:1px solid var(--line);}
.plain-list > div:first-child{padding-top:0;border-top:none;}
.plain-list h4{font-size:16px;font-weight:700;margin-bottom:6px;}
.plain-list p{color:var(--text-soft);font-size:14.5px;}

/* image lightbox: native <dialog> so it escapes any container's overflow/
   stacking context without a manual z-index scale */
[data-zoomable]{cursor:zoom-in;transition:opacity .18s ease;}
[data-zoomable]:hover{opacity:.92;}
.lightbox{border:none;padding:0;background:transparent;max-width:94vw;max-height:94vh;margin:auto;}
.lightbox::backdrop{background:rgba(10,12,20,.88);}
.lightbox img{display:block;max-width:94vw;max-height:94vh;width:auto;height:auto;border-radius:10px;}
.lightbox-close{
  position:fixed;top:20px;right:24px;width:44px;height:44px;border-radius:50%;
  border:none;background:rgba(255,255,255,.14);color:#fff;font-size:26px;line-height:1;
  cursor:pointer;display:flex;align-items:center;justify-content:center;
}
.lightbox-close:hover{background:rgba(255,255,255,.26);}
@media (max-width:520px){.lightbox-close{top:12px;right:12px;width:40px;height:40px;font-size:22px;}}