:root{
  --ink:#0B0E14;
  --panel:#121722;
  --panel-2:#0F141D;
  --line:#20293A;
  --cyan:#38E1C4;
  --amber:#F5A623;
  --steel:#A6B0C0;
  --white:#EDF1F7;
  --dim:#6B7688;
  --display:'Space Grotesk',sans-serif;
  --body:'Inter',sans-serif;
  --mono:'JetBrains Mono',monospace;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--ink);
  color:var(--steel);
  font-family:var(--body);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{font-family:var(--display);color:var(--white);line-height:1.05;letter-spacing:-.02em}

/* NAV */
.nav{
  position:sticky;top:0;z-index:50;
  display:flex;align-items:center;justify-content:space-between;
  padding:18px 40px;
  background:rgba(11,14,20,.72);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.brand{display:flex;align-items:center;gap:10px;font-family:var(--mono);font-weight:700;letter-spacing:.04em}
.brand-mark{color:var(--cyan);font-size:1.1rem}
.brand-name{color:var(--white);font-size:.95rem}
.brand-dim{color:var(--dim);margin-left:2px}
.nav-links{display:flex;align-items:center;gap:28px;font-size:.9rem;font-weight:500}
.nav-links a{color:var(--steel);transition:color .2s}
.nav-links a:hover{color:var(--white)}
.nav-cta{
  color:var(--ink)!important;background:var(--cyan);
  padding:8px 16px;border-radius:6px;font-weight:600;
}
.nav-cta:hover{background:#5cf0d8}
.lang-switch{display:inline-flex;align-items:center;gap:6px;font-family:var(--mono);font-size:.8rem;letter-spacing:.04em;margin-left:4px}
.lang-switch a{color:var(--dim);transition:color .2s}
.lang-switch a:hover{color:var(--white)}
.lang-switch a.lang-active{color:var(--cyan);font-weight:700}
.lang-sep{color:var(--line)}

/* HERO */
.hero{position:relative;padding:110px 40px 90px;overflow:hidden}
.hero-grid{
  position:absolute;inset:0;
  background-image:linear-gradient(var(--line) 1px,transparent 1px),
                   linear-gradient(90deg,var(--line) 1px,transparent 1px);
  background-size:56px 56px;
  mask-image:radial-gradient(circle at 30% 20%,#000 0%,transparent 65%);
  opacity:.5;
}
.hero-inner{position:relative;max-width:1080px;margin:0 auto}
.eyebrow{
  font-family:var(--mono);font-size:.78rem;letter-spacing:.14em;
  text-transform:uppercase;color:var(--cyan);
  display:flex;align-items:center;gap:10px;margin-bottom:26px;
}
.dot{width:8px;height:8px;border-radius:50%;background:var(--cyan);box-shadow:0 0 12px var(--cyan)}
.hero h1{font-size:clamp(2.6rem,6.5vw,5rem);font-weight:600;margin-bottom:26px}
.hero h1 .accent{color:var(--cyan)}
.lede{max-width:620px;font-size:1.12rem;color:var(--steel);margin-bottom:34px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:56px}

.btn{
  display:inline-block;padding:13px 24px;border-radius:8px;
  font-weight:600;font-size:.95rem;transition:.2s;cursor:pointer;border:none;
  font-family:var(--body);
}
.btn-primary{background:var(--cyan);color:var(--ink)}
.btn-primary:hover{background:#5cf0d8;transform:translateY(-1px)}
.btn-ghost{border:1px solid var(--line);color:var(--white)}
.btn-ghost:hover{border-color:var(--cyan);color:var(--cyan)}
.btn-full{width:100%;text-align:center}

/* Signature: flow */
.flow{
  display:flex;align-items:center;gap:0;flex-wrap:wrap;
  padding:22px;border:1px solid var(--line);border-radius:12px;
  background:linear-gradient(180deg,var(--panel),var(--panel-2));
  max-width:720px;font-family:var(--mono);
}
.flow-node{
  padding:10px 16px;border:1px solid var(--line);border-radius:6px;
  font-size:.8rem;letter-spacing:.08em;color:var(--white);background:var(--ink);
  white-space:nowrap;
}
.flow-node.ok{color:var(--cyan);border-color:var(--cyan);box-shadow:0 0 18px rgba(56,225,196,.25)}
.flow-wire{flex:1;min-width:32px;height:2px;background:var(--line);position:relative;margin:0 4px;overflow:hidden}
.pulse{
  position:absolute;top:0;left:-30%;width:30%;height:100%;
  background:linear-gradient(90deg,transparent,var(--cyan),transparent);
  animation:travel 2.4s linear infinite;
}
@keyframes travel{to{left:130%}}

/* BAND */
.band{
  display:grid;grid-template-columns:repeat(3,1fr);gap:0;
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
.cap{padding:44px 40px;border-right:1px solid var(--line)}
.cap:last-child{border-right:none}
.cap-num{font-family:var(--mono);color:var(--cyan);font-size:.85rem;letter-spacing:.1em}
.cap h3{font-size:1.25rem;margin:14px 0 10px}
.cap p{font-size:.95rem}

/* SECTIONS */
.section{padding:88px 40px;max-width:1160px;margin:0 auto}
.section-alt{background:var(--panel-2);max-width:none}
.section-alt > *{max-width:1160px;margin-left:auto;margin-right:auto}
.section-head{margin-bottom:48px;max-width:680px}
.section-eyebrow{
  font-family:var(--mono);font-size:.76rem;letter-spacing:.14em;text-transform:uppercase;
  color:var(--amber);margin-bottom:14px;
}
.section-head h2{font-size:clamp(1.8rem,3.5vw,2.6rem);font-weight:600}
.section-sub{margin-top:14px;font-size:1rem;color:var(--steel)}

/* PROJECTS */
.projects{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.project{
  padding:26px;border:1px solid var(--line);border-radius:12px;
  background:var(--panel);transition:.25s;
}
.project:hover{border-color:var(--cyan);transform:translateY(-3px)}
.project-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px}
.chip{
  font-family:var(--mono);font-size:.72rem;letter-spacing:.08em;
  color:var(--cyan);border:1px solid var(--line);padding:4px 9px;border-radius:5px;
}
.project-idx{color:var(--dim)}
.project:hover .project-idx{color:var(--cyan)}
.project h3{font-size:1.15rem;margin-bottom:10px}
.project p{font-size:.9rem;margin-bottom:16px}
.apis{list-style:none;display:flex;flex-wrap:wrap;gap:6px}
.apis li{
  font-family:var(--mono);font-size:.72rem;color:var(--steel);
  background:var(--ink);padding:4px 8px;border-radius:5px;border:1px solid var(--line);
}

/* STACK */
.stack-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.stack-col{padding:24px;border:1px solid var(--line);border-radius:12px;background:var(--panel)}
.stack-col h4{font-size:.95rem;color:var(--cyan);margin-bottom:16px;font-family:var(--mono);letter-spacing:.02em}
.stack-col ul{list-style:none}
.stack-col li{
  font-size:.9rem;padding:8px 0;border-bottom:1px solid var(--line);color:var(--steel);
}
.stack-col li:last-child{border-bottom:none}

/* INFRA */
.infra-two{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.infra-block{padding:30px;border:1px solid var(--line);border-radius:12px;background:var(--panel)}
.infra-block h4{display:flex;align-items:center;gap:10px;font-size:1.05rem;margin-bottom:20px}
.tick{width:10px;height:10px;background:var(--cyan);border-radius:2px;box-shadow:0 0 10px var(--cyan)}
.tick.amber{background:var(--amber);box-shadow:0 0 10px var(--amber)}
.tags{display:flex;flex-wrap:wrap;gap:9px}
.tag{
  font-family:var(--mono);font-size:.82rem;color:var(--white);
  background:var(--ink);padding:8px 13px;border-radius:6px;border:1px solid var(--line);
  transition:.2s;
}
.tag:hover{border-color:var(--cyan);color:var(--cyan)}

/* CONTACT */
.contact-wrap{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:start}
.contact-copy h2{font-size:clamp(1.8rem,3.5vw,2.6rem);font-weight:600;margin-bottom:14px}
.mail-direct{
  display:inline-block;margin-top:22px;font-family:var(--mono);
  color:var(--cyan);border-bottom:1px solid var(--line);padding-bottom:3px;transition:.2s;
}
.mail-direct:hover{border-color:var(--cyan)}
.form-card{padding:32px;border:1px solid var(--line);border-radius:14px;background:var(--panel)}
.field{margin-bottom:18px}
.row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
label{display:block;font-size:.82rem;font-weight:500;color:var(--steel);margin-bottom:8px}
.opt{color:var(--dim);font-weight:400}
input,textarea{
  width:100%;padding:12px 14px;background:var(--ink);
  border:1px solid var(--line);border-radius:8px;color:var(--white);
  font-family:var(--body);font-size:.95rem;transition:.2s;
}
input:focus,textarea:focus{outline:none;border-color:var(--cyan);box-shadow:0 0 0 3px rgba(56,225,196,.12)}
textarea{resize:vertical}
.hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
.notice{padding:14px 16px;border-radius:8px;margin-bottom:20px;font-size:.92rem}
.notice.ok{background:rgba(56,225,196,.1);border:1px solid var(--cyan);color:var(--white)}
.notice.err{background:rgba(245,166,35,.1);border:1px solid var(--amber);color:var(--white)}

/* FOOTER */
.foot{
  display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px;
  padding:28px 40px;border-top:1px solid var(--line);
  font-size:.85rem;color:var(--dim);
}
.foot-mono{font-family:var(--mono);letter-spacing:.06em}

/* RESPONSIVE */
@media(max-width:900px){
  .nav{padding:16px 22px}
  .nav-links{gap:16px}
  .band{grid-template-columns:1fr}
  .cap{border-right:none;border-bottom:1px solid var(--line)}
  .projects{grid-template-columns:1fr 1fr}
  .stack-grid{grid-template-columns:1fr 1fr}
  .infra-two,.contact-wrap{grid-template-columns:1fr}
  .section,.hero{padding-left:22px;padding-right:22px}
}
@media(max-width:600px){
  .nav-links a:not(.nav-cta):not(.lang-switch a){display:none}
  .nav-links .lang-switch a{display:inline}
  .projects,.stack-grid,.row{grid-template-columns:1fr}
  .hero{padding-top:70px}
}
@media(prefers-reduced-motion:reduce){
  .pulse{animation:none;opacity:.5}
  .btn:hover,.project:hover{transform:none}
}