/* ==========================================================================
   Khersonsky Corporation — design tokens
   ========================================================================== */
:root{
  --navy-950:#0A1628;
  --navy-900:#0E1E36;
  --navy-800:#122A48;
  --navy-700:#1A3A61;
  --steel-500:#5B7A99;
  --steel-300:#A9BED1;
  --steel-100:#DCE6EE;
  --accent-500:#3FA8A0;
  --accent-400:#57C4BB;
  --paper-50:#F5F7FA;
  --paper-0:#FFFFFF;
  --ink-900:#101826;
  --ink-700:#26344A;
  --ink-600:#4B5A6C;
  --ink-400:#7C8CA0;
  --line:#E1E7EE;
  --line-dark:rgba(169,190,209,0.16);

  --font-display:'Space Grotesk', 'Segoe UI', sans-serif;
  --font-body:'Inter', 'Segoe UI', sans-serif;
  --font-mono:'IBM Plex Mono', ui-monospace, monospace;

  --radius:10px;
  --wrap:1180px;
}

*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{animation-duration:0.01ms !important; animation-iteration-count:1 !important; transition-duration:0.01ms !important;}
}

body{
  margin:0;
  font-family:var(--font-body);
  color:var(--ink-700);
  background:var(--paper-0);
  -webkit-font-smoothing:antialiased;
  line-height:1.55;
}

h1,h2,h3{
  font-family:var(--font-display);
  color:var(--ink-900);
  margin:0 0 0.5em;
  line-height:1.12;
  letter-spacing:-0.01em;
}

p{margin:0 0 1em;}
a{color:inherit;}

.skip-link{
  position:absolute; left:-999px; top:0;
  background:var(--navy-950); color:#fff; padding:12px 18px;
  z-index:999; border-radius:0 0 8px 0;
}
.skip-link:focus{left:0;}

.wrap{
  width:100%;
  max-width:var(--wrap);
  margin:0 auto;
  padding:0 28px;
}

a:focus-visible, button:focus-visible{
  outline:2px solid var(--accent-500);
  outline-offset:3px;
}

/* ==========================================================================
   Header
   ========================================================================== */
.site-header{
  position:sticky; top:0; z-index:100;
  background:rgba(255,255,255,0.88);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.header-inner{
  display:flex; align-items:center; justify-content:space-between;
  height:72px;
  gap:24px;
}
.brand{
  display:flex; align-items:center; gap:10px;
  text-decoration:none;
  color:var(--navy-950);
}
.brand-mark{color:var(--accent-500); display:flex;}
.brand-text{
  font-family:var(--font-display);
  font-weight:600;
  font-size:1.05rem;
  letter-spacing:-0.01em;
  display:flex; flex-direction:column; line-height:1.15;
}
.brand-sub{
  font-family:var(--font-mono);
  font-size:0.62rem;
  font-weight:400;
  letter-spacing:0.14em;
  text-transform:uppercase;
  color:var(--steel-500);
}
.main-nav{
  display:flex; gap:30px;
  font-size:0.92rem;
  font-weight:500;
}
.main-nav a{
  text-decoration:none;
  color:var(--ink-600);
  transition:color .15s ease;
  position:relative;
}
.main-nav a:hover{color:var(--navy-950);}

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn{
  display:inline-flex; align-items:center; gap:8px;
  padding:13px 24px;
  border-radius:6px;
  font-family:var(--font-body);
  font-weight:600;
  font-size:0.92rem;
  text-decoration:none;
  border:1px solid transparent;
  cursor:pointer;
  transition:transform .15s ease, background .15s ease, border-color .15s ease, color .15s ease;
  white-space:nowrap;
}
.btn:hover{transform:translateY(-1px);}
.btn-primary{
  background:var(--accent-500);
  color:#062522;
}
.btn-primary:hover{background:var(--accent-400);}
.btn-ghost{
  background:transparent;
  border-color:var(--line);
  color:var(--ink-700);
}
.btn-ghost:hover{border-color:var(--steel-500);}
.btn-small{padding:10px 18px; font-size:0.85rem;}

.section-dark .btn-ghost{border-color:var(--line-dark); color:var(--steel-100);}

/* ==========================================================================
   Eyebrow / section titles
   ========================================================================== */
.eyebrow{
  font-family:var(--font-mono);
  font-size:0.72rem;
  letter-spacing:0.16em;
  text-transform:uppercase;
  color:var(--accent-500);
  margin:0 0 14px;
  font-weight:500;
}
.eyebrow-light{color:var(--accent-400);}

.section-title{
  font-size:clamp(1.7rem, 2.6vw, 2.5rem);
  max-width:820px;
}
.section-title.light{color:#fff;}
.section-lead{
  color:var(--ink-600);
  font-size:1.05rem;
  max-width:640px;
  margin-bottom:2.5rem;
}
.section-lead.light{color:var(--steel-300);}

/* ==========================================================================
   Hero
   ========================================================================== */
.hero{
  background:
    radial-gradient(1100px 620px at 78% -10%, rgba(63,168,160,0.16), transparent 60%),
    linear-gradient(180deg, var(--navy-950), var(--navy-900) 70%, var(--navy-900));
  color:#fff;
  padding:96px 0 88px;
  position:relative;
  overflow:hidden;
}
.hero-inner{
  display:grid;
  grid-template-columns:1.05fr 0.95fr;
  gap:40px;
  align-items:center;
}
.hero-copy h1{
  color:#fff;
  font-size:clamp(2.1rem, 4vw, 3.3rem);
  margin-bottom:0.45em;
}
.accent-text{color:var(--accent-400);}
.hero-lead{
  color:var(--steel-300);
  font-size:1.12rem;
  max-width:520px;
  margin-bottom:2rem;
}
.hero-actions{
  display:flex; gap:14px; flex-wrap:wrap;
  margin-bottom:2.6rem;
}
.hero-tags{
  list-style:none; margin:0; padding:0;
  display:flex; flex-wrap:wrap; gap:10px 18px;
  font-family:var(--font-mono);
  font-size:0.72rem;
  letter-spacing:0.06em;
  color:var(--steel-500);
}
.hero-tags li{position:relative; padding-left:14px;}
.hero-tags li::before{
  content:""; position:absolute; left:0; top:50%;
  width:6px; height:6px; border-radius:50%;
  background:var(--accent-500);
  transform:translateY(-50%);
}

.hero-diagram{width:100%; max-width:460px; margin:0 auto;}
.hero-diagram svg text{
  font-family:var(--font-mono);
  font-size:12.5px;
  fill:var(--steel-300);
}
.hero-diagram .device-node{color:var(--steel-300);}
.hero-diagram .device-node rect{stroke:var(--steel-300);}
.hero-diagram .device-node circle{fill:var(--steel-300);}
.hero-diagram .trunk{
  stroke:var(--steel-500);
  stroke-width:2;
}
.hero-diagram .hub{fill:var(--accent-500);}
.hero-diagram .branch{
  fill:none;
  stroke:var(--steel-500);
  stroke-width:2;
  stroke-dasharray:220;
  stroke-dashoffset:220;
  animation:draw 1.4s ease forwards;
}
.hero-diagram .b1{animation-delay:.3s;}
.hero-diagram .b2{animation-delay:.5s;}
.hero-diagram .b3{animation-delay:.7s;}
.hero-diagram .b4{animation-delay:.9s;}
@keyframes draw{to{stroke-dashoffset:0;}}

.hero-diagram .endpoint circle{fill:var(--accent-400); opacity:0; animation:pop .4s ease forwards;}
.hero-diagram .ep1 circle{animation-delay:1.6s;}
.hero-diagram .ep2 circle{animation-delay:1.8s;}
.hero-diagram .ep3 circle{animation-delay:2s;}
.hero-diagram .ep4 circle{animation-delay:2.2s;}
.hero-diagram .endpoint text{opacity:0; animation:fadein .5s ease forwards;}
.hero-diagram .ep1 text{animation-delay:1.7s;}
.hero-diagram .ep2 text{animation-delay:1.9s;}
.hero-diagram .ep3 text{animation-delay:2.1s;}
.hero-diagram .ep4 text{animation-delay:2.3s;}
@keyframes pop{from{opacity:0; transform:scale(0.4);} to{opacity:1; transform:scale(1);}}
@keyframes fadein{to{opacity:1;}}

@media (prefers-reduced-motion: reduce){
  .hero-diagram .branch{animation:none; stroke-dashoffset:0;}
  .hero-diagram .endpoint circle, .hero-diagram .endpoint text{animation:none; opacity:1;}
}

/* ==========================================================================
   Section rhythm
   ========================================================================== */
.section, .section-quiet, .section-dark{padding:88px 0;}
.section-quiet{background:var(--paper-50);}
.section-dark{
  background:var(--navy-950);
  color:var(--steel-300);
}

/* Feature cards (why section) */
.grid-3{
  display:grid;
  grid-template-columns:repeat(3, 1fr);
  gap:28px;
}
.feature-card{
  background:var(--paper-0);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:30px 26px;
}
.feature-index{
  font-family:var(--font-mono);
  color:var(--accent-500);
  font-size:0.85rem;
  display:block;
  margin-bottom:14px;
}
.feature-card h3{font-size:1.1rem; margin-bottom:0.5em;}
.feature-card p{color:var(--ink-600); font-size:0.95rem; margin:0;}

/* Capabilities */
.cap-grid{
  display:grid;
  grid-template-columns:repeat(3, 1fr);
  gap:1px;
  background:var(--line);
  border:1px solid var(--line);
  border-radius:var(--radius);
  overflow:hidden;
}
.cap-card{
  background:var(--paper-0);
  padding:32px 28px;
  display:flex; flex-direction:column;
}
.cap-tag{
  font-family:var(--font-mono);
  font-size:0.68rem;
  letter-spacing:0.12em;
  text-transform:uppercase;
  color:var(--steel-500);
  margin-bottom:14px;
}
.cap-card h3{font-size:1.08rem; margin-bottom:0.5em;}
.cap-card p{color:var(--ink-600); font-size:0.93rem; flex-grow:1;}
.cap-link{
  margin-top:16px;
  font-weight:600;
  font-size:0.88rem;
  text-decoration:none;
  color:var(--navy-800);
}
.cap-link:hover{color:var(--accent-500);}

/* Operating model / steps */
.steps{
  list-style:none;
  margin:0 0 3rem;
  padding:0;
  display:grid;
  grid-template-columns:repeat(3, 1fr);
  gap:28px;
}
.step{
  padding-top:20px;
  border-top:1px solid var(--line-dark);
}
.step-num{
  font-family:var(--font-mono);
  color:var(--accent-400);
  font-size:0.85rem;
  display:block;
  margin-bottom:10px;
}
.step h3{color:#fff; font-size:1.15rem;}
.step p{color:var(--steel-300); font-size:0.94rem; margin:0;}

.path-strip{
  display:grid;
  grid-template-columns:repeat(4, 1fr);
  gap:14px;
}
.path-chip{
  border:1px solid var(--line-dark);
  border-radius:8px;
  padding:18px 18px;
  background:rgba(169,190,209,0.04);
}
.path-chip strong{
  display:block;
  color:#fff;
  font-family:var(--font-display);
  font-size:1rem;
  margin-bottom:4px;
}
.path-chip span{
  color:var(--steel-500);
  font-size:0.82rem;
}

/* Parts section */
.parts-inner{
  display:grid;
  grid-template-columns:1.1fr 0.9fr;
  gap:56px;
  align-items:center;
}
.tag-list{
  list-style:none; margin:0 0 2rem; padding:0;
  display:flex; flex-wrap:wrap; gap:10px;
}
.tag-list li{
  font-size:0.85rem;
  font-family:var(--font-mono);
  padding:8px 14px;
  border:1px solid var(--line);
  border-radius:100px;
  color:var(--ink-600);
}
.parts-visual svg{display:block; width:100%; max-width:340px; margin:0 auto;}
.pv-body{fill:var(--paper-50); stroke:var(--steel-300); stroke-width:2;}
.pv-screen{fill:var(--navy-950);}
.pv-line{stroke:var(--accent-500); stroke-width:1.4; opacity:0.55;}
.pv-dot{fill:var(--steel-500);}
.pv-ring{fill:none; stroke:var(--accent-500); stroke-width:1.4; opacity:0.5;}

/* Audience grid */
.grid-audience{margin-top:0.5rem;}
.audience-card{
  background:var(--paper-0);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:26px;
}
.audience-tag{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:0.68rem;
  letter-spacing:0.1em;
  text-transform:uppercase;
  color:#fff;
  background:var(--navy-800);
  padding:5px 10px;
  border-radius:4px;
  margin-bottom:14px;
}
.audience-card h3{font-size:1.05rem;}
.audience-card p{color:var(--ink-600); font-size:0.92rem; margin:0;}

/* Leadership */
.leader-grid{
  display:grid;
  grid-template-columns:repeat(2, 1fr);
  gap:32px;
}
.leader-card{
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:36px;
  background:var(--paper-0);
}
.leader-role{
  font-family:var(--font-mono);
  font-size:0.72rem;
  letter-spacing:0.1em;
  text-transform:uppercase;
  color:var(--accent-500);
  margin-bottom:10px;
}
.leader-card h3{font-size:1.35rem; margin-bottom:0.6em;}
.leader-bio{color:var(--ink-600); font-size:0.95rem;}
.leader-points{
  margin:0 0 1.5rem;
  padding-left:20px;
  color:var(--ink-600);
  font-size:0.92rem;
}
.leader-points li{margin-bottom:6px;}
.leader-card blockquote{
  margin:0;
  padding-top:18px;
  border-top:1px solid var(--line);
  font-family:var(--font-display);
  font-style:normal;
  font-size:1rem;
  color:var(--ink-900);
}

/* Hiring */
.hiring-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:40px;
  flex-wrap:wrap;
}
.hiring-inner .section-title{margin-bottom:0.4em;}
.hiring-inner .section-lead{margin-bottom:0;}

/* Contact */
.contact-grid{
  display:grid;
  grid-template-columns:repeat(2, 1fr);
  gap:24px;
}
.contact-card{
  border:1px solid var(--line-dark);
  border-radius:var(--radius);
  padding:30px;
  background:rgba(169,190,209,0.04);
}
.contact-role{
  font-family:var(--font-mono);
  font-size:0.7rem;
  letter-spacing:0.1em;
  text-transform:uppercase;
  color:var(--accent-400);
  margin-bottom:10px;
}
.contact-card h3{color:#fff; font-size:1.3rem; margin-bottom:0.3em;}
.contact-title{color:var(--steel-500); font-size:0.9rem; margin-bottom:1rem;}
.contact-email{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:0.92rem;
  color:var(--accent-400);
  text-decoration:none;
  border-bottom:1px solid transparent;
}
.contact-email:hover{border-bottom-color:var(--accent-400);}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer{
  background:var(--navy-950);
  color:var(--steel-500);
  padding:56px 0 34px;
  border-top:1px solid var(--line-dark);
}
.footer-inner{
  display:grid;
  grid-template-columns:1.3fr 1fr 1fr;
  gap:36px;
  margin-bottom:40px;
}
.footer-brand .brand-text{color:#fff;}
.footer-brand p{color:var(--steel-500); font-size:0.9rem; margin-top:12px; max-width:280px;}
.footer-nav{display:flex; flex-direction:column; gap:10px; font-size:0.9rem;}
.footer-nav a{text-decoration:none; color:var(--steel-300);}
.footer-nav a:hover{color:#fff;}
.footer-meta{font-size:0.82rem; text-align:right;}
.footer-meta p{margin-bottom:6px;}

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 900px){
  .main-nav{display:none;}
  .hero-inner{grid-template-columns:1fr;}
  .hero-diagram{max-width:380px;}
  .grid-3, .cap-grid, .steps, .path-strip, .leader-grid, .contact-grid{grid-template-columns:1fr;}
  .parts-inner{grid-template-columns:1fr;}
  .footer-inner{grid-template-columns:1fr; text-align:left;}
  .footer-meta{text-align:left;}
  .hiring-inner{flex-direction:column; align-items:flex-start;}
}

@media (max-width: 560px){
  .wrap{padding:0 20px;}
  .section, .section-quiet, .section-dark{padding:64px 0;}
  .hero{padding:64px 0 56px;}
}