:root{
  --ink:#0d1117;
  --panel:#141b24;
  --panel-hi:#1a2330;
  --line:#232d3a;
  --text:#e6edf3;
  --muted:#9aa7b8;
  --accent:#22d3ee;
  --accent-dim:#0e7490;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--ink);
  color:var(--text);
  font-family:'Inter',system-ui,sans-serif;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
.wrap{max-width:960px;margin:0 auto;padding:0 24px}
.mono{font-family:'JetBrains Mono',monospace}
a{color:inherit}

/* ---------- header ---------- */
header{border-bottom:1px solid var(--line);position:sticky;top:0;background:rgba(13,17,23,.85);backdrop-filter:blur(8px);z-index:10}
.bar{display:flex;justify-content:space-between;align-items:center;height:64px}
.brand{font-family:'JetBrains Mono',monospace;font-weight:700;font-size:18px;letter-spacing:-.5px}
.brand b{color:var(--accent)}
.nav-right{display:flex;align-items:center;gap:20px}
nav a{font-family:'JetBrains Mono',monospace;font-size:13px;color:var(--muted);text-decoration:none;margin-left:22px;transition:color .2s}
nav a:hover{color:var(--accent)}

/* ---------- language switch ---------- */
.lang{display:flex;border:1px solid var(--line);border-radius:6px;overflow:hidden}
.lang button{
  font-family:'JetBrains Mono',monospace;font-size:12px;font-weight:500;
  background:transparent;color:var(--muted);border:none;cursor:pointer;
  padding:6px 10px;transition:background .2s,color .2s;
}
.lang button:hover{color:var(--text)}
.lang button[aria-pressed="true"]{background:var(--accent);color:var(--ink)}

@media(max-width:560px){
  nav a{margin-left:14px;font-size:12px}
  .nav-right{gap:12px}
  .lang button{padding:5px 8px;font-size:11px}
}

/* ---------- hero ---------- */
.hero{padding:96px 0 72px;position:relative}
.hero::before{
  content:"";position:absolute;inset:-96px -50vw -40px;z-index:-1;pointer-events:none;
  background-image:
    radial-gradient(ellipse 60% 60% at 30% 20%, rgba(34,211,238,.10), transparent 70%),
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size:100% 100%, 48px 48px, 48px 48px;
  -webkit-mask-image:radial-gradient(ellipse 70% 80% at 40% 30%, #000 30%, transparent 75%);
          mask-image:radial-gradient(ellipse 70% 80% at 40% 30%, #000 30%, transparent 75%);
  opacity:.55;
}
.eyebrow{font-family:'JetBrains Mono',monospace;font-size:13px;color:var(--accent);letter-spacing:.5px;margin-bottom:24px}
.eyebrow::before{content:"// ";color:var(--muted)}
h1{font-size:clamp(34px,6vw,58px);line-height:1.05;font-weight:600;letter-spacing:-0.02em;margin-bottom:24px}
h1 .hl{color:var(--accent)}
h1 .ul{
  background-image:linear-gradient(var(--accent-dim),var(--accent-dim));
  background-size:100% 3px;background-repeat:no-repeat;background-position:0 92%;
  padding-bottom:2px;
}
.lead{font-size:clamp(16px,2.4vw,20px);color:var(--muted);max-width:620px}
.cta-row{margin-top:36px;display:flex;gap:14px;flex-wrap:wrap}

/* ---------- buttons ---------- */
.btn{font-family:'JetBrains Mono',monospace;font-size:14px;text-decoration:none;padding:12px 22px;border-radius:6px;transition:all .2s;cursor:pointer;border:none;display:inline-block}
.btn-primary{background:var(--accent);color:var(--ink);font-weight:500}
.btn-primary:hover{background:#5ce0f2;transform:translateY(-1px)}
.btn-ghost{border:1px solid var(--line);color:var(--text);background:transparent}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent)}

/* ---------- sections ---------- */
section{padding:64px 0;scroll-margin-top:88px}
.sec-label{font-family:'JetBrains Mono',monospace;font-size:12px;color:var(--muted);text-transform:uppercase;letter-spacing:1.5px;margin-bottom:28px}
h2{font-size:clamp(24px,4vw,34px);font-weight:600;letter-spacing:-0.015em;margin-bottom:20px}
p.body{color:var(--muted);max-width:640px;margin-bottom:14px}

/* ---------- stack manifest ---------- */
.manifest{border:1px solid var(--line);border-radius:10px;overflow:hidden;background:var(--panel)}
.manifest-head{display:flex;align-items:center;gap:8px;padding:12px 18px;border-bottom:1px solid var(--line);font-family:'JetBrains Mono',monospace;font-size:12px;color:var(--muted)}
.dot{width:11px;height:11px;border-radius:50%}
.dot.r{background:#ff5f56}
.dot.y{background:#ffbd2e}
.dot.g{background:#27c93f}
.manifest-head span{margin-left:8px}
.module{
  display:grid;grid-template-columns:1fr 300px;gap:6px 18px;align-items:start;
  padding:20px 22px;border-bottom:1px solid var(--line);
  transition:background .2s;
}
.module:last-child{border-bottom:none}
.module:hover{background:var(--panel-hi)}
.module .key{font-family:'JetBrains Mono',monospace;font-size:15px;font-weight:500}
.module .key i{color:var(--accent);font-style:normal;display:inline-block;transition:transform .2s}
.module:hover .key i{transform:translateX(4px)}
.module .desc{grid-column:1/2;color:var(--muted);font-size:14px;margin-top:4px}
.tags{grid-column:2/3;grid-row:1/3;display:flex;flex-wrap:wrap;gap:6px;justify-content:flex-end;align-content:flex-start}
.tag{font-family:'JetBrains Mono',monospace;font-size:11px;color:var(--muted);border:1px solid var(--line);border-radius:4px;padding:3px 8px;white-space:nowrap;transition:color .2s,border-color .2s}
.module:hover .tag{color:var(--accent);border-color:var(--accent-dim)}

@media(max-width:720px){
  .module{grid-template-columns:1fr}
  .tags{grid-column:1;grid-row:auto;justify-content:flex-start;margin-top:10px}
}

/* ---------- contact ---------- */
.contact-cols{display:grid;grid-template-columns:1.2fr 1fr;gap:32px;align-items:start}
@media(max-width:820px){.contact-cols{grid-template-columns:1fr}}

form{background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:24px}
.field{margin-bottom:18px}
label{display:block;font-family:'JetBrains Mono',monospace;font-size:12px;color:var(--muted);text-transform:uppercase;letter-spacing:1px;margin-bottom:8px}
input,textarea{
  width:100%;background:var(--ink);border:1px solid var(--line);border-radius:6px;
  padding:11px 13px;color:var(--text);font-family:inherit;font-size:15px;
  transition:border-color .2s;resize:vertical;
}
input:focus,textarea:focus{outline:none;border-color:var(--accent)}
textarea{min-height:120px}
form .btn-primary{width:100%;padding:13px}
.form-note{font-size:12px;color:var(--muted);margin-top:12px;text-align:center;font-family:'JetBrains Mono',monospace}

.info-list{display:flex;flex-direction:column;gap:1px;background:var(--line);border:1px solid var(--line);border-radius:10px;overflow:hidden}
.cell{background:var(--panel);padding:20px 22px;min-width:0}
.cell .k{font-family:'JetBrains Mono',monospace;font-size:12px;color:var(--muted);text-transform:uppercase;letter-spacing:1px;margin-bottom:6px}
.cell .v{font-size:16px;overflow-wrap:anywhere}

/* ---------- footer ---------- */
footer{border-top:1px solid var(--line);padding:32px 0;font-family:'JetBrains Mono',monospace;font-size:13px;color:var(--muted)}
footer .wrap{display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px}

/* ---------- reveal ---------- */
@media(prefers-reduced-motion:no-preference){
  .reveal{opacity:0;transform:translateY(16px);transition:opacity .6s ease,transform .6s ease}
  .reveal.in{opacity:1;transform:none}
}