/* ============================================================
   LETH TECH INC — shared stylesheet
   ============================================================ */
:root{
  --bg:#080B15;
  --surface:#0E1424;
  --surface-2:#141C31;
  --border:rgba(255,255,255,.08);
  --border-strong:rgba(255,255,255,.16);
  --text:#EAEEF9;
  --muted:#8A93AC;
  --teal:#3FE3B4;
  --violet:#9B87FF;
  --cyan:#54D2FF;
  --display:"Bricolage Grotesque",sans-serif;
  --body:"Inter",sans-serif;
  --mono:"Space Mono",monospace;
  --maxw:1200px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--bg);color:var(--text);font-family:var(--body);
  line-height:1.6;-webkit-font-smoothing:antialiased;overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
::selection{background:var(--teal);color:#04140E}
img{max-width:100%;display:block}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 28px}

.eyebrow{
  font-family:var(--mono);font-size:12px;letter-spacing:.22em;
  text-transform:uppercase;color:var(--teal);
  display:inline-flex;align-items:center;gap:10px;
}
.eyebrow::before{content:"";width:26px;height:1px;background:linear-gradient(90deg,var(--teal),transparent)}
h1,h2,h3{font-family:var(--display);font-weight:700;line-height:1.05;letter-spacing:-.02em}
.grad{background:linear-gradient(100deg,var(--teal),var(--cyan) 45%,var(--violet));-webkit-background-clip:text;background-clip:text;color:transparent}

/* ---------- Buttons ---------- */
.btn{
  font-family:var(--body);font-weight:600;font-size:15px;
  padding:11px 20px;border-radius:100px;cursor:pointer;border:1px solid transparent;
  display:inline-flex;align-items:center;gap:8px;
  transition:transform .2s ease,box-shadow .2s ease,background .2s,border-color .2s;
}
.btn-primary{background:linear-gradient(120deg,var(--teal),var(--cyan));color:#04140E;box-shadow:0 6px 22px rgba(63,227,180,.25)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 10px 30px rgba(63,227,180,.38)}
.btn-ghost{border-color:var(--border-strong);color:var(--text);background:transparent}
.btn-ghost:hover{border-color:var(--text);background:rgba(255,255,255,.04)}

/* ---------- Header ---------- */
header{
  position:fixed;top:0;left:0;right:0;z-index:50;
  backdrop-filter:blur(12px);background:rgba(8,11,21,.55);
  border-bottom:1px solid transparent;transition:border-color .3s ease,background .3s ease;
}
header.scrolled{border-bottom-color:var(--border);background:rgba(8,11,21,.82)}
.nav{display:flex;align-items:center;justify-content:space-between;height:70px}
.brand{display:flex;align-items:center;gap:11px;font-family:var(--display);font-weight:800;font-size:19px;letter-spacing:-.01em}
.brand .dot{width:11px;height:11px;border-radius:50%;background:radial-gradient(circle at 30% 30%,var(--teal),var(--violet));box-shadow:0 0 14px var(--teal)}
.nav-links{display:flex;align-items:center;gap:34px}
.nav-links a{color:var(--muted);font-size:15px;font-weight:500;transition:color .2s}
.nav-links a:hover{color:var(--text)}
.nav-links a.active{color:var(--text)}
.nav-links a.active:not(.btn)::after{content:"";display:block;height:2px;margin-top:3px;border-radius:2px;background:linear-gradient(90deg,var(--teal),var(--violet))}
.menu-toggle{display:none;background:none;border:0;color:var(--text);cursor:pointer;padding:8px}
.menu-toggle svg{display:block}

/* ---------- Home hero ---------- */
.hero{position:relative;padding:150px 0 110px;overflow:hidden}
.aurora{position:absolute;inset:-20% -10% auto -10%;height:130%;z-index:0;pointer-events:none;filter:blur(70px);opacity:.85}
.aurora span{position:absolute;border-radius:50%;mix-blend-mode:screen}
.a1{width:640px;height:420px;left:6%;top:-6%;background:radial-gradient(circle,rgba(63,227,180,.55),transparent 62%);animation:drift1 18s ease-in-out infinite}
.a2{width:560px;height:380px;left:44%;top:-14%;background:radial-gradient(circle,rgba(155,135,255,.5),transparent 62%);animation:drift2 22s ease-in-out infinite}
.a3{width:520px;height:340px;left:24%;top:8%;background:radial-gradient(circle,rgba(84,210,255,.42),transparent 62%);animation:drift3 26s ease-in-out infinite}
@keyframes drift1{0%,100%{transform:translate(0,0) scale(1)}50%{transform:translate(60px,30px) scale(1.12)}}
@keyframes drift2{0%,100%{transform:translate(0,0) scale(1)}50%{transform:translate(-70px,40px) scale(1.08)}}
@keyframes drift3{0%,100%{transform:translate(0,0) scale(1)}50%{transform:translate(40px,-30px) scale(1.14)}}
.hero .wrap{position:relative;z-index:2}
.hero h1{font-size:clamp(2.7rem,6.2vw,5rem);max-width:16ch;margin:26px 0 0}
.hero p.lead{color:var(--muted);font-size:clamp(1.05rem,1.6vw,1.28rem);max-width:56ch;margin:26px 0 0;line-height:1.55}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:38px}
.cap-row{display:flex;flex-wrap:wrap;gap:10px 26px;margin-top:56px;padding-top:26px;border-top:1px solid var(--border)}
.cap-row span{font-family:var(--mono);font-size:12.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}
.cap-row span b{color:var(--text);font-weight:400}

/* ---------- Inner page hero ---------- */
.page-hero{position:relative;padding:150px 0 66px;overflow:hidden}
.page-hero .aurora{opacity:.5;filter:blur(90px);height:120%}
.page-hero .wrap{position:relative;z-index:2}
.page-hero h1{font-size:clamp(2.4rem,5vw,3.8rem);max-width:18ch;margin:22px 0 0}
.page-hero p{color:var(--muted);font-size:clamp(1.05rem,1.5vw,1.2rem);max-width:60ch;margin:22px 0 0}

/* ---------- Section shell ---------- */
.block{padding:100px 0}
.block.tight{padding:76px 0}
.sec-head{max-width:660px;margin-bottom:56px}
.sec-head h2{font-size:clamp(2rem,4vw,2.9rem);margin-top:16px}
.sec-head p{color:var(--muted);margin-top:16px;font-size:1.08rem}
.tone{background:var(--surface);border-top:1px solid var(--border);border-bottom:1px solid var(--border)}

/* ---------- Service grid (cards) ---------- */
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--border);border:1px solid var(--border);border-radius:20px;overflow:hidden}
.card{background:var(--surface);padding:38px 32px;transition:background .3s ease}
.card:hover{background:var(--surface-2)}
.card .ico{width:46px;height:46px;border-radius:12px;display:flex;align-items:center;justify-content:center;background:rgba(63,227,180,.1);border:1px solid rgba(63,227,180,.22);margin-bottom:22px}
.card .ico svg{width:22px;height:22px;stroke:var(--teal);fill:none}
.card h3{font-size:1.32rem;margin-bottom:12px}
.card p{color:var(--muted);font-size:.98rem}
.card a.more{display:inline-block;margin-top:16px;color:var(--teal);font-size:.9rem;font-family:var(--mono);letter-spacing:.04em}

/* ---------- Service detail rows ---------- */
.svc{display:grid;grid-template-columns:56px 1fr;gap:26px;padding:44px 0;border-top:1px solid var(--border)}
.svc:last-child{border-bottom:1px solid var(--border)}
.svc .num{font-family:var(--mono);color:var(--muted);font-size:14px;padding-top:6px}
.svc h3{font-size:1.7rem;margin-bottom:14px}
.svc p{color:var(--muted);max-width:60ch}
.chips{display:flex;flex-wrap:wrap;gap:9px;margin-top:20px}
.chips span{font-size:13px;color:var(--text);border:1px solid var(--border);background:var(--surface);padding:7px 13px;border-radius:100px}

/* ---------- Process steps ---------- */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.step{border:1px solid var(--border);border-radius:18px;padding:30px;background:var(--surface)}
.step .n{font-family:var(--mono);color:var(--teal);font-size:13px;letter-spacing:.14em}
.step h3{font-size:1.25rem;margin:14px 0 10px}
.step p{color:var(--muted);font-size:.96rem}

/* ---------- About ---------- */
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:start}
.about-grid .lede{font-family:var(--display);font-weight:500;font-size:clamp(1.4rem,2.4vw,1.9rem);line-height:1.3;letter-spacing:-.01em}
.about-grid .lede em{font-style:normal;background:linear-gradient(100deg,var(--teal),var(--cyan));-webkit-background-clip:text;background-clip:text;color:transparent}
.about-grid .body p{color:var(--muted);margin-bottom:18px}
.values{display:flex;flex-wrap:wrap;gap:10px;margin-top:8px}
.values span{font-family:var(--mono);font-size:12px;letter-spacing:.1em;text-transform:uppercase;color:var(--text);border:1px solid var(--border);padding:8px 14px;border-radius:100px}

/* ---------- Ventures ---------- */
.venture-card{background:linear-gradient(140deg,var(--surface-2),var(--surface));border:1px solid var(--border);border-radius:24px;padding:48px;display:grid;grid-template-columns:1.1fr 1fr;gap:40px;align-items:center;position:relative;overflow:hidden}
.venture-card::after{content:"";position:absolute;right:-120px;top:-120px;width:340px;height:340px;background:radial-gradient(circle,rgba(155,135,255,.32),transparent 65%);filter:blur(40px);pointer-events:none}
.venture-card .tag{font-family:var(--mono);font-size:12px;letter-spacing:.16em;text-transform:uppercase;color:var(--violet);border:1px solid rgba(155,135,255,.35);padding:5px 12px;border-radius:100px;display:inline-block}
.venture-card h3{font-size:2.1rem;margin:20px 0 12px;position:relative;z-index:2}
.venture-card p{color:var(--muted);position:relative;z-index:2}
.venture-card .url{font-family:var(--mono);color:var(--cyan);font-size:.92rem;margin-top:20px;display:inline-block;position:relative;z-index:2}
.browser{background:var(--bg);border:1px solid var(--border);border-radius:14px;overflow:hidden;position:relative;z-index:2}
.browser .bar{display:flex;align-items:center;gap:7px;padding:12px 14px;border-bottom:1px solid var(--border)}
.browser .bar i{width:10px;height:10px;border-radius:50%;background:var(--border-strong);display:inline-block}
.browser .bar .addr{margin-left:10px;font-family:var(--mono);font-size:11px;color:var(--muted)}
.browser .body{padding:40px 26px;text-align:center}
.browser .body .big{font-family:var(--display);font-weight:800;font-size:1.8rem}
.browser .body .sub{color:var(--muted);font-size:.9rem;margin-top:8px}

/* ---------- Team ---------- */
.team-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.member{border:1px solid var(--border);border-radius:20px;padding:32px;background:var(--surface);text-align:center;transition:background .3s,transform .3s}
.member:hover{background:var(--surface-2);transform:translateY(-4px)}
.avatar{width:96px;height:96px;border-radius:50%;margin:0 auto 20px;overflow:hidden;display:flex;align-items:center;justify-content:center;font-family:var(--display);font-weight:700;font-size:2rem;color:#04140E;background:linear-gradient(140deg,var(--teal),var(--violet));box-shadow:0 8px 26px rgba(63,227,180,.22)}
.avatar img{width:100%;height:100%;object-fit:cover;display:block}
.team-grid.two{grid-template-columns:repeat(2,minmax(0,360px));justify-content:center}
.member p .role-note{color:var(--teal);font-weight:600}
.member h3{font-size:1.3rem}
.member .role{font-family:var(--mono);font-size:12px;letter-spacing:.1em;text-transform:uppercase;color:var(--teal);margin:6px 0 14px}
.member p{color:var(--muted);font-size:.95rem}

/* ---------- Contact ---------- */
.contact-inner{text-align:center;max-width:720px;margin:0 auto}
.contact-inner h2{font-size:clamp(2.2rem,5vw,3.4rem)}
.contact-inner p{color:var(--muted);margin:18px auto 0;max-width:48ch;font-size:1.1rem}
.contact-cta{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;margin-top:34px}
.contact-meta{display:flex;flex-wrap:wrap;gap:14px 40px;justify-content:center;margin-top:48px;padding-top:34px;border-top:1px solid var(--border)}
.contact-meta div{text-align:center}
.contact-meta .k{font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}
.contact-meta .v{font-size:1.02rem;margin-top:4px}

/* ---------- CTA band ---------- */
.cta-band{text-align:center;max-width:720px;margin:0 auto}
.cta-band h2{font-size:clamp(2rem,4.5vw,3rem)}
.cta-band p{color:var(--muted);margin:16px auto 30px;max-width:46ch}

/* ---------- Footer ---------- */
footer{padding:56px 0 40px;border-top:1px solid var(--border);background:var(--surface)}
.foot-top{display:flex;flex-wrap:wrap;justify-content:space-between;gap:30px;margin-bottom:36px}
.foot-links{display:flex;flex-wrap:wrap;gap:22px}
.foot-links a{color:var(--muted);font-size:.95rem;transition:color .2s}
.foot-links a:hover{color:var(--text)}
.foot-bottom{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:16px;padding-top:26px;border-top:1px solid var(--border)}
.foot-bottom .copy{color:var(--muted);font-size:.88rem}
.foot .brand{font-size:17px}

/* ---------- Reveal ---------- */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}

/* ---------- Responsive ---------- */
@media(max-width:900px){
  .grid,.team-grid,.steps{grid-template-columns:repeat(2,1fr)}
  .venture-card{grid-template-columns:1fr;gap:32px}
  .about-grid{grid-template-columns:1fr;gap:32px}
}
@media(max-width:720px){
  .nav-links{
    position:fixed;inset:70px 0 auto 0;flex-direction:column;gap:0;
    background:rgba(8,11,21,.97);backdrop-filter:blur(14px);border-bottom:1px solid var(--border);
    padding:8px 0;transform:translateY(-140%);transition:transform .35s ease;
  }
  .nav-links.open{transform:none}
  .nav-links a{padding:16px 28px;width:100%;font-size:16px}
  .nav-links a.active:not(.btn)::after{display:none}
  .nav-links .btn{margin:12px 28px;justify-content:center}
  .menu-toggle{display:inline-flex}
  .grid,.team-grid,.steps{grid-template-columns:1fr}
  .venture-card{padding:32px 24px}
  .block{padding:72px 0}
  .hero{padding:130px 0 80px}
  .page-hero{padding:130px 0 54px}
  .svc{grid-template-columns:1fr;gap:10px}
  .contact-meta div{text-align:center}
}
@media(prefers-reduced-motion:reduce){
  *{animation:none!important;scroll-behavior:auto!important}
  .reveal{opacity:1;transform:none;transition:none}
}
a:focus-visible,button:focus-visible{outline:2px solid var(--teal);outline-offset:3px;border-radius:6px}

.brand .mark{width:26px;height:26px;display:block;flex-shrink:0}