/* ==========================================================================
   Дмитрий Анишин — cio-a.ru
   Design system: "инженерная консоль" — blueprint grid + viewfinder marks,
   borrowed from the visual language of machine-vision / industrial telemetry
   that runs through the case studies themselves.
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Golos+Text:wght@600;700;800;900&family=Inter:wght@400;500;600&family=IBM+Plex+Mono:wght@400;500;600&display=swap');

:root{
  --bg:            #0B121C;
  --bg-1:          #0F1826;
  --bg-panel:      #131F2E;
  --bg-panel-2:    #16233348;
  --line:          #223247;
  --line-soft:     #1A2636;
  --ink:           #EAF0F6;
  --ink-dim:       #93A5BA;
  --ink-faint:     #5A6C82;
  --accent:        #FFB020;
  --accent-ink:    #17120A;
  --accent-dim:    #8A6323;
  --live:          #5FD3A6;
  --wire:          #2C3F58;

  --display: 'Golos Text', 'Inter', sans-serif;
  --body:    'Inter', sans-serif;
  --mono:    'IBM Plex Mono', ui-monospace, monospace;

  --container: 1180px;
  --radius: 3px;
}

/* ---------- reset ---------- */
*,*::before,*::after{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:var(--body);
  font-size:16px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
img{ max-width:100%; display:block; }
a{ color:inherit; text-decoration:none; }
ul{ margin:0; padding:0; list-style:none; }
h1,h2,h3,h4{ margin:0; font-family:var(--display); font-weight:800; letter-spacing:-0.01em; }
p{ margin:0; }
button{ font:inherit; }

::selection{ background:var(--accent); color:var(--accent-ink); }

:focus-visible{
  outline:2px solid var(--accent);
  outline-offset:3px;
}

@media (prefers-reduced-motion: reduce){
  *{ animation-duration:0.001ms !important; animation-iteration-count:1 !important; transition-duration:0.001ms !important; scroll-behavior:auto !important; }
}

/* ---------- background grid (blueprint) ---------- */
.grid-bg{
  position:fixed; inset:0; z-index:-2; pointer-events:none;
  background-image:
    linear-gradient(var(--line-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-soft) 1px, transparent 1px);
  background-size:64px 64px;
  opacity:.35;
  mask-image:radial-gradient(ellipse 90% 60% at 50% 0%, #000 40%, transparent 100%);
}

/* ---------- layout helpers ---------- */
.wrap{ max-width:var(--container); margin:0 auto; padding:0 28px; }
section{ position:relative; padding:96px 0; border-top:1px solid var(--line); }
section:first-of-type{ border-top:none; }
.section-head{ max-width:640px; margin-bottom:56px; }

@media (max-width:720px){
  section{ padding:64px 0; }
  .wrap{ padding:0 20px; }
}

/* eyebrow / log-tag label — echoes the console log lines from the case studies */
.tag{
  display:inline-flex; align-items:center; gap:8px;
  font-family:var(--mono); font-size:12.5px; letter-spacing:.06em;
  color:var(--accent); text-transform:uppercase;
  margin-bottom:16px;
}
.tag::before{
  content:''; width:6px; height:6px; border-radius:50%;
  background:var(--accent); box-shadow:0 0 8px var(--accent);
}
.tag.live::before{ background:var(--live); box-shadow:0 0 8px var(--live); animation:blink 2.4s ease-in-out infinite; }
.tag.live{ color:var(--live); }
@keyframes blink{ 0%,100%{opacity:1;} 50%{opacity:.35;} }

h2.h-lg{ font-size:clamp(28px,3.4vw,40px); line-height:1.15; }
.lede{ color:var(--ink-dim); font-size:17px; margin-top:16px; line-height:1.65; }

/* ---------- viewfinder corner marks (signature element) ---------- */
.vf{ position:relative; }
.vf::before,.vf::after,
.vf .c2::before,.vf .c2::after{
  content:''; position:absolute; width:14px; height:14px;
  border-color:var(--accent); opacity:.55;
  transition:opacity .25s ease, width .25s ease, height .25s ease;
}
.vf::before{ top:-1px; left:-1px; border-top:2px solid; border-left:2px solid; }
.vf::after{ top:-1px; right:-1px; border-top:2px solid; border-right:2px solid; }
.vf .c2{ position:absolute; inset:0; }
.vf .c2::before{ bottom:-1px; left:-1px; border-bottom:2px solid; border-left:2px solid; }
.vf .c2::after{ bottom:-1px; right:-1px; border-bottom:2px solid; border-right:2px solid; }
.vf:hover::before,.vf:hover::after,
.vf:hover .c2::before,.vf:hover .c2::after{ opacity:1; width:20px; height:20px; }

/* ---------- nav ---------- */
header.site{
  position:sticky; top:0; z-index:50;
  backdrop-filter:blur(10px);
  background:rgba(11,18,28,.82);
  border-bottom:1px solid var(--line);
}
.nav{ display:flex; align-items:center; justify-content:space-between; height:72px; }
.brand{ display:flex; align-items:center; gap:10px; font-family:var(--mono); font-size:14px; }
.brand .mark{
  width:34px; height:34px; border:1.5px solid var(--accent); border-radius:6px;
  display:flex; align-items:center; justify-content:center;
  font-family:var(--display); font-weight:800; font-size:14px; color:var(--accent);
}
.brand .name{ color:var(--ink); }
.brand .name b{ color:var(--ink); font-weight:600; }
.brand .domain{ color:var(--ink-faint); }

nav.links{ display:flex; gap:32px; font-size:14.5px; color:var(--ink-dim); }
nav.links a{ position:relative; padding:4px 0; transition:color .2s; }
nav.links a:hover{ color:var(--ink); }
nav.links a::after{
  content:''; position:absolute; left:0; right:100%; bottom:-2px; height:1px;
  background:var(--accent); transition:right .25s ease;
}
nav.links a:hover::after{ right:0; }

.nav-cta{
  font-family:var(--mono); font-size:13px; color:var(--accent);
  border:1px solid var(--accent-dim); padding:9px 16px; border-radius:3px;
  transition:background .2s, color .2s;
}
.nav-cta:hover{ background:var(--accent); color:var(--accent-ink); }

.nav-toggle{ display:none; }
@media (max-width:860px){
  nav.links{ display:none; }
  .nav-toggle{
    display:flex; flex-direction:column; gap:5px; background:none; border:none; cursor:pointer; padding:8px;
  }
  .nav-toggle span{ width:20px; height:2px; background:var(--ink); display:block; }
  .mobile-menu{
    display:none; flex-direction:column; gap:2px; padding:8px 0 20px;
    border-bottom:1px solid var(--line);
  }
  .mobile-menu.open{ display:flex; }
  .mobile-menu a{ padding:12px 4px; color:var(--ink-dim); border-top:1px solid var(--line-soft); font-size:15px; }
}
@media (min-width:861px){ .mobile-menu{ display:none !important; } }

/* back-link on case pages */
.back-link{
  display:inline-flex; align-items:center; gap:8px; font-family:var(--mono); font-size:13px;
  color:var(--ink-dim); margin-bottom:28px; transition:color .2s;
}
.back-link:hover{ color:var(--accent); }

/* ---------- hero ---------- */
.hero{ padding-top:88px; padding-bottom:88px; border-top:none; overflow:hidden; }
.hero-grid{ display:grid; grid-template-columns:1.1fr .9fr; gap:56px; align-items:start; }
@media (max-width:920px){ .hero-grid{ grid-template-columns:1fr; } }

.hero h1{
  font-size:clamp(40px,6vw,68px); line-height:1.02; letter-spacing:-0.02em;
  color:var(--ink);
}
.hero .role{
  margin-top:18px; font-family:var(--mono); font-size:15px; color:var(--accent);
  letter-spacing:.02em;
}
.hero .role span{ color:var(--ink-faint); }
.hero .intro{ margin-top:22px; font-size:17.5px; color:var(--ink-dim); max-width:52ch; line-height:1.7; }

.hero-actions{ display:flex; gap:14px; margin-top:34px; flex-wrap:wrap; }
.btn{
  font-family:var(--mono); font-size:13.5px; padding:13px 22px; border-radius:3px;
  display:inline-flex; align-items:center; gap:8px; transition:all .2s ease;
}
.btn-primary{ background:var(--accent); color:var(--accent-ink); font-weight:600; }
.btn-primary:hover{ background:#ffc558; transform:translateY(-1px); }
.btn-ghost{ border:1px solid var(--line); color:var(--ink-dim); }
.btn-ghost:hover{ border-color:var(--accent); color:var(--accent); }

/* telemetry panel */
.telemetry{
  border:1px solid var(--line); background:var(--bg-panel); border-radius:6px; padding:22px;
}
.telemetry-head{
  display:flex; justify-content:space-between; align-items:center;
  font-family:var(--mono); font-size:11.5px; color:var(--ink-faint); text-transform:uppercase;
  letter-spacing:.08em; padding-bottom:16px; border-bottom:1px dashed var(--line);
}
.tel-grid{ display:grid; grid-template-columns:1fr 1fr; gap:1px; background:var(--line); margin-top:1px; }
.tel-cell{ background:var(--bg-panel); padding:20px 18px; }
.tel-num{ font-family:var(--mono); font-size:26px; font-weight:600; color:var(--ink); }
.tel-num span{ color:var(--accent); }
.tel-label{ margin-top:6px; font-size:12.5px; color:var(--ink-faint); line-height:1.4; }

/* ---------- about ---------- */
.about-grid{ display:grid; grid-template-columns:.9fr 1.1fr; gap:64px; }
@media (max-width:860px){ .about-grid{ grid-template-columns:1fr; gap:36px; } }
.about-body p{ color:var(--ink-dim); margin-bottom:18px; font-size:16px; }
.about-body p:last-child{ margin-bottom:0; }
.about-body strong{ color:var(--ink); font-weight:600; }

.fact-list{ display:flex; flex-direction:column; gap:0; border-top:1px solid var(--line); }
.fact-list li{
  display:flex; justify-content:space-between; gap:16px; padding:14px 0;
  border-bottom:1px solid var(--line); font-size:14.5px;
}
.fact-list .k{ color:var(--ink-faint); font-family:var(--mono); font-size:13px; }
.fact-list .v{ color:var(--ink); text-align:right; }

/* ---------- competencies ---------- */
.comp-groups{ display:grid; grid-template-columns:repeat(3,1fr); gap:1px; background:var(--line); border:1px solid var(--line); }
@media (max-width:920px){ .comp-groups{ grid-template-columns:1fr; } }
.comp-card{ background:var(--bg-1); padding:32px 28px; position:relative; }
.comp-card .idx{ font-family:var(--mono); font-size:12px; color:var(--accent); letter-spacing:.06em; }
.comp-card h3{ font-size:21px; margin-top:12px; color:var(--ink); }
.comp-card .desc{ margin-top:10px; font-size:14.5px; color:var(--ink-dim); line-height:1.6; }
.comp-card .skills{ margin-top:20px; display:flex; flex-direction:column; gap:9px; }
.comp-card .skills li{
  font-size:14px; color:var(--ink-dim); padding-left:16px; position:relative; line-height:1.5;
}
.comp-card .skills li::before{
  content:'—'; position:absolute; left:0; color:var(--accent-dim);
}

/* ---------- principles ---------- */
.principles{ display:grid; grid-template-columns:repeat(4,1fr); gap:22px; }
@media (max-width:960px){ .principles{ grid-template-columns:1fr 1fr; } }
@media (max-width:560px){ .principles{ grid-template-columns:1fr; } }
.principle{ border:1px solid var(--line); border-radius:4px; padding:22px 20px; }
.principle .num{ font-family:var(--mono); color:var(--ink-faint); font-size:12px; }
.principle h4{ font-size:16px; margin-top:10px; color:var(--ink); font-weight:700; }
.principle p{ margin-top:8px; font-size:13.8px; color:var(--ink-dim); line-height:1.55; }

/* ---------- cases grid ---------- */
.cases-grid{ display:grid; grid-template-columns:repeat(3,1fr); gap:22px; }
@media (max-width:960px){ .cases-grid{ grid-template-columns:1fr 1fr; } }
@media (max-width:640px){ .cases-grid{ grid-template-columns:1fr; } }

.case-card{
  display:block; border:1px solid var(--line); border-radius:5px; padding:24px 22px;
  background:var(--bg-1); transition:border-color .2s, transform .2s;
  position:relative; overflow:hidden;
}
.case-card:hover{ border-color:var(--accent-dim); transform:translateY(-3px); }
.case-card .cat{ font-family:var(--mono); font-size:11.5px; color:var(--accent); text-transform:uppercase; letter-spacing:.05em; }
.case-card h3{ font-size:19px; margin-top:12px; color:var(--ink); line-height:1.3; }
.case-card p{ margin-top:10px; font-size:14px; color:var(--ink-dim); line-height:1.55; }
.case-card .stack{ margin-top:16px; display:flex; flex-wrap:wrap; gap:6px; }
.case-card .stack span{
  font-family:var(--mono); font-size:11px; color:var(--ink-faint);
  border:1px solid var(--line); padding:3px 8px; border-radius:20px;
}
.case-card .go{
  margin-top:18px; font-family:var(--mono); font-size:12.5px; color:var(--ink-faint);
  display:flex; align-items:center; gap:6px;
}
.case-card:hover .go{ color:var(--accent); }

.updating-badge{
  display:inline-flex; align-items:center; gap:8px; font-family:var(--mono); font-size:12.5px;
  color:var(--ink-faint); border:1px dashed var(--line); padding:8px 14px; border-radius:20px; margin-top:18px;
}

/* ---------- contact ---------- */
.contact-panel{
  border:1px solid var(--line); border-radius:6px; padding:44px; background:var(--bg-panel);
  display:grid; grid-template-columns:1.1fr .9fr; gap:40px;
}
@media (max-width:820px){ .contact-panel{ grid-template-columns:1fr; padding:28px; } }
.contact-links{ display:flex; flex-direction:column; gap:18px; margin-top:24px; }
.contact-links a{
  font-family:var(--mono); font-size:16px; color:var(--ink); display:flex; align-items:center; gap:12px;
  padding-bottom:14px; border-bottom:1px solid var(--line); transition:color .2s;
}
.contact-links a:hover{ color:var(--accent); }
.contact-links .lbl{ color:var(--ink-faint); font-size:12px; text-transform:uppercase; letter-spacing:.06em; display:block; margin-bottom:4px; }
.city-tags{ display:flex; flex-wrap:wrap; gap:8px; margin-top:14px; }
.city-tags span{ font-size:12.5px; font-family:var(--mono); border:1px solid var(--line); padding:5px 10px; border-radius:20px; color:var(--ink-dim); }

/* ---------- footer ---------- */
footer.site{ border-top:1px solid var(--line); padding:36px 0; }
.foot-row{ display:flex; justify-content:space-between; align-items:center; flex-wrap:wrap; gap:16px; }
.foot-row .fmono{ font-family:var(--mono); font-size:12.5px; color:var(--ink-faint); }
.foot-links{ display:flex; gap:22px; font-size:13.5px; color:var(--ink-dim); }
.foot-links a:hover{ color:var(--accent); }

/* ==========================================================================
   Case detail pages
   ========================================================================== */
.case-hero{ padding-top:56px; padding-bottom:56px; }
.case-meta-row{ display:flex; flex-wrap:wrap; gap:10px; margin-bottom:20px; }
.meta-chip{
  font-family:var(--mono); font-size:11.5px; color:var(--ink-dim); border:1px solid var(--line);
  padding:5px 11px; border-radius:20px; text-transform:uppercase; letter-spacing:.04em;
}
.case-hero h1{ font-size:clamp(30px,4.4vw,48px); line-height:1.12; max-width:20ch; }
.case-hero .dek{ margin-top:20px; font-size:18px; color:var(--ink-dim); max-width:62ch; line-height:1.65; }

.case-stat-strip{
  display:grid; grid-template-columns:repeat(auto-fit,minmax(140px,1fr)); gap:1px;
  background:var(--line); border:1px solid var(--line); margin-top:40px;
}
.case-stat-strip .cell{ background:var(--bg-panel); padding:22px 18px; }
.case-stat-strip .num{ font-family:var(--mono); font-size:26px; color:var(--accent); font-weight:600; }
.case-stat-strip .lbl{ margin-top:6px; font-size:12.5px; color:var(--ink-faint); line-height:1.4; }

.prose{ max-width:760px; }
.prose h2{ font-size:26px; margin-top:56px; margin-bottom:18px; color:var(--ink); }
.prose h2 .eyebrow{ display:block; font-family:var(--mono); font-size:12px; color:var(--accent); margin-bottom:10px; letter-spacing:.05em; text-transform:uppercase; }
.prose p{ color:var(--ink-dim); margin-bottom:18px; font-size:16px; line-height:1.75; }
.prose ul{ margin:0 0 20px; display:flex; flex-direction:column; gap:12px; }
.prose ul li{ color:var(--ink-dim); font-size:15.5px; padding-left:20px; position:relative; line-height:1.65; }
.prose ul li::before{ content:'—'; position:absolute; left:0; color:var(--accent-dim); }
.prose code{ font-family:var(--mono); background:var(--bg-panel); padding:2px 6px; border-radius:3px; font-size:.9em; color:var(--accent); }
.prose strong{ color:var(--ink); font-weight:600; }

.callout{
  border-left:2px solid var(--accent); background:var(--bg-panel); padding:20px 24px;
  margin:28px 0; border-radius:0 4px 4px 0;
}
.callout p{ color:var(--ink-dim); margin:0; font-size:15.5px; line-height:1.7; }
.callout .cal-tag{ font-family:var(--mono); font-size:11px; color:var(--accent); text-transform:uppercase; letter-spacing:.06em; display:block; margin-bottom:10px; }

.term-panel{
  background:#080D14; border:1px solid var(--line); border-radius:5px; overflow:hidden; margin:28px 0;
}
.term-head{ display:flex; gap:6px; padding:10px 14px; border-bottom:1px solid var(--line); }
.term-head span{ width:9px; height:9px; border-radius:50%; background:var(--line); }
.term-body{ padding:18px 20px; font-family:var(--mono); font-size:12.8px; color:#9FB4C9; overflow-x:auto; line-height:1.75; white-space:pre; }
.term-body .g{ color:var(--live); }
.term-body .a{ color:var(--accent); }
.term-body .d{ color:var(--ink-faint); }

.figure{
  border:1px dashed var(--line); border-radius:5px; padding:34px 24px; text-align:center; margin:28px 0;
  background:var(--bg-panel-2);
}
.figure .ficon{ font-family:var(--mono); font-size:11px; color:var(--ink-faint); letter-spacing:.05em; text-transform:uppercase; }
.figure .cap{ margin-top:12px; font-size:14.5px; color:var(--ink-dim); max-width:52ch; margin-left:auto; margin-right:auto; }

.compare-table{ width:100%; border-collapse:collapse; margin:28px 0; font-size:14.5px; }
.compare-table th,.compare-table td{ border:1px solid var(--line); padding:12px 14px; text-align:left; vertical-align:top; }
.compare-table th{ font-family:var(--mono); font-size:12px; text-transform:uppercase; letter-spacing:.04em; color:var(--ink-faint); font-weight:500; background:var(--bg-panel); }
.compare-table td{ color:var(--ink-dim); }
.compare-table td.yes{ color:var(--live); }
.compare-table td strong{ color:var(--ink); }

.case-cta{
  margin-top:72px; border:1px solid var(--line); border-radius:6px; padding:40px;
  background:var(--bg-panel); display:flex; justify-content:space-between; align-items:center; gap:24px; flex-wrap:wrap;
}
.case-cta h3{ font-size:22px; color:var(--ink); }
.case-cta p{ margin-top:8px; color:var(--ink-dim); font-size:15px; max-width:46ch; }

.next-case{ display:flex; justify-content:space-between; align-items:center; margin-top:48px; padding-top:28px; border-top:1px solid var(--line); }
.next-case a{ font-family:var(--mono); font-size:13.5px; color:var(--ink-dim); transition:color .2s; }
.next-case a:hover{ color:var(--accent); }

/* ---------- screenshots ---------- */
.shot{ margin:32px 0; border:1px solid var(--line); border-radius:6px; overflow:hidden; background:var(--bg-panel); }
.shot img{ width:100%; height:auto; display:block; }
.shot figcaption{ padding:12px 16px; font-family:var(--mono); font-size:12px; color:var(--ink-faint); border-top:1px solid var(--line); line-height:1.5; }

/* ---------- consulting repositioning ---------- */
.hero h1.long{ font-size:clamp(32px,4.6vw,54px); line-height:1.08; letter-spacing:-0.02em; }
.hero .who{ margin-top:18px; font-family:var(--mono); font-size:14.5px; color:var(--accent); }
.hero .who span{ color:var(--ink-faint); }
.vs-wrap{ overflow-x:auto; }
.vs-table{ width:100%; border-collapse:collapse; min-width:720px; font-size:15px; }
.vs-table th,.vs-table td{ border:1px solid var(--line); padding:16px 18px; text-align:left; vertical-align:top; line-height:1.55; }
.vs-table th{ font-family:var(--mono); font-size:12px; text-transform:uppercase; letter-spacing:.05em; color:var(--ink-faint); font-weight:500; background:var(--bg-panel); }
.vs-table td:first-child{ color:var(--ink); font-weight:600; width:22%; }
.vs-table td:nth-child(2){ color:var(--ink-faint); }
.vs-table td:nth-child(3){ color:var(--ink-dim); background:rgba(255,176,32,.04); }
.vs-table td:nth-child(3) a{ color:var(--accent); }
.vs-note{ margin-top:22px; font-size:14.5px; color:var(--ink-faint); max-width:70ch; line-height:1.65; }
.svc-grid{ display:grid; grid-template-columns:repeat(3,1fr); gap:22px; }
@media (max-width:960px){ .svc-grid{ grid-template-columns:1fr 1fr; } }
@media (max-width:640px){ .svc-grid{ grid-template-columns:1fr; } }
.svc{ border:1px solid var(--line); border-radius:5px; padding:26px 22px; background:var(--bg-1); display:flex; flex-direction:column; }
.svc .n{ font-family:var(--mono); font-size:12px; color:var(--accent); letter-spacing:.06em; }
.svc h3{ font-size:19px; margin-top:12px; color:var(--ink); line-height:1.3; }
.svc p{ margin-top:10px; font-size:14.5px; color:var(--ink-dim); line-height:1.6; }
.svc .res{ margin-top:auto; padding-top:16px; font-size:13.5px; color:var(--ink-dim); border-top:1px dashed var(--line); margin-top:18px; line-height:1.5; }
.svc .res b{ color:var(--accent); font-family:var(--mono); font-weight:500; font-size:11.5px; text-transform:uppercase; letter-spacing:.05em; display:block; margin-bottom:4px; }
.steps{ display:grid; grid-template-columns:repeat(3,1fr); gap:22px; }
@media (max-width:860px){ .steps{ grid-template-columns:1fr; } }
.step{ border-top:2px solid var(--accent); padding-top:18px; }
.step .n{ font-family:var(--mono); font-size:12px; color:var(--ink-faint); }
.step h3{ font-size:20px; margin-top:8px; color:var(--ink); }
.step p{ margin-top:10px; color:var(--ink-dim); font-size:15px; line-height:1.65; }
.chips{ display:flex; flex-wrap:wrap; gap:8px; margin-top:22px; }
.chips span{ font-family:var(--mono); font-size:12.5px; border:1px solid var(--line); padding:6px 12px; border-radius:20px; color:var(--ink-dim); }
.faq{ max-width:820px; }
.faq details{ border-bottom:1px solid var(--line); padding:18px 0; }
.faq summary{ cursor:pointer; font-family:var(--display); font-weight:700; font-size:18px; color:var(--ink); list-style:none; display:flex; justify-content:space-between; gap:16px; }
.faq summary::-webkit-details-marker{ display:none; }
.faq summary::after{ content:'+'; font-family:var(--mono); color:var(--accent); font-size:22px; line-height:1; }
.faq details[open] summary::after{ content:'–'; }
.faq details p{ margin-top:12px; color:var(--ink-dim); font-size:15.5px; line-height:1.7; }
.faq details a{ color:var(--accent); }
.write-list{ margin-top:18px; display:flex; flex-direction:column; gap:10px; }
.write-list li{ color:var(--ink-dim); font-size:15px; padding-left:20px; position:relative; line-height:1.55; }
.write-list li::before{ content:'—'; position:absolute; left:0; color:var(--accent-dim); }