/* Erion Robotics — styles.css (v3) */
/* Clean, high-tech, lighter “midnight” theme. Works with the current HTML structure. */

:root{
  --bg:#0b1224;
  --bg2:#0e1730;
  --panel:#121c38;
  --panel2:#0f1731;
  --text:#eaf1ff;
  --muted:#b2c1df;

  --brand:#4aa3ff;
  --brand2:#9bd3ff;

  --line:rgba(255,255,255,.10);
  --line2:rgba(255,255,255,.14);

  --shadow:0 18px 60px rgba(0,0,0,.28);
  --shadow2:0 10px 30px rgba(0,0,0,.22);

  --radius:18px;
  --radius2:14px;
}

/* Base */
*{ box-sizing:border-box; }
html,body{ height:100%; }
body{
  margin:0;
  font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;
  color:var(--text);
  background:linear-gradient(180deg,var(--bg) 0%, var(--bg2) 55%, #0a1022 100%);
  overflow-x:hidden;
}

a{ color:inherit; text-decoration:none; }
img{ max-width:100%; display:block; }

.container{
  max-width:1120px;
  margin:0 auto;
  padding:0 20px;
}

/* High-tech ambient background */
body:before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:-1;
  background:
    radial-gradient(700px 360px at 18% 10%, rgba(74,163,255,.22), transparent 62%),
    radial-gradient(560px 320px at 82% 18%, rgba(155,211,255,.16), transparent 60%),
    radial-gradient(900px 560px at 50% 120%, rgba(74,163,255,.10), transparent 60%),
    repeating-linear-gradient(90deg, rgba(255,255,255,.04) 0 1px, transparent 1px 90px),
    repeating-linear-gradient(0deg,  rgba(255,255,255,.03) 0 1px, transparent 1px 90px);
  opacity:.55;
}

/* Header */
.header{
  position:sticky;
  top:0;
  z-index:50;
  background:rgba(11,18,36,.70);
  backdrop-filter: blur(12px);
  border-bottom:1px solid var(--line);
}

.header__inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:14px 0;
}

.brand{
  display:flex;
  align-items:center;
  gap:12px;
}

.brand__logo{ height:56px; width:auto; display:block; }
@media (max-width:860px){ .brand__logo{ height:44px; } }

.nav{
  display:flex;
  align-items:center;
  gap:10px;
}

.nav a{
  padding:10px 12px;
  border-radius:999px;
  color:var(--muted);
  transition: background .18s ease, color .18s ease, transform .18s ease;
}

.nav a:hover{
  background:rgba(255,255,255,.06);
  color:var(--text);
}

.nav__cta{
  background:linear-gradient(90deg,var(--brand),var(--brand2));
  color:#061022 !important;
  font-weight:800;
  box-shadow:0 16px 44px rgba(74,163,255,.18);
  border:0 !important;
}

.header__right{
  display:flex;
  align-items:center;
  gap:10px;
}

/* Buttons */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  padding:12px 16px;
  border-radius:14px;
  border:1px solid var(--line);
  background:rgba(255,255,255,.04);
  color:var(--text);
  font-weight:800;
  letter-spacing:.2px;
  transition: transform .18s ease, background .18s ease, border-color .18s ease;
}

.btn:hover{
  transform: translateY(-1px);
  background:rgba(255,255,255,.06);
  border-color:rgba(155,211,255,.22);
}

.btn--primary{
  border:0;
  background:linear-gradient(90deg,var(--brand),var(--brand2));
  color:#061022;
  box-shadow:0 18px 54px rgba(74,163,255,.22);
}

.btn--secondary{
  background:rgba(255,255,255,.04);
}

/* Lang toggle */
.lang{
  border:1px solid var(--line);
  background:rgba(255,255,255,.03);
  color:var(--text);
  border-radius:999px;
  padding:9px 12px;
  cursor:pointer;
  font-weight:800;
  transition: background .18s ease, border-color .18s ease;
}
.lang:hover{
  background:rgba(255,255,255,.05);
  border-color:rgba(155,211,255,.22);
}

/* Burger */
.burger{
  display:none;
  border:1px solid var(--line);
  background:rgba(255,255,255,.03);
  border-radius:14px;
  width:44px;
  height:40px;
  cursor:pointer;
}
.burger span{
  display:block;
  height:2px;
  background:var(--text);
  margin:7px 10px;
  opacity:.9;
}

/* Mobile nav */
@media (max-width: 860px){
  .nav{
    display:none;
    position:absolute;
    left:12px;
    right:12px;
    top:66px;
    padding:12px;
    flex-direction:column;
    align-items:stretch;
    background:rgba(11,18,36,.92);
    border:1px solid var(--line);
    border-radius:18px;
    box-shadow: var(--shadow);
  }
  .nav a{ border-radius:14px; }
  .burger{ display:block; }
  .nav.nav--open{ display:flex; }
}

/* Hero */
.hero{
  position:relative;
  overflow:hidden;
  min-height:540px;
  border-bottom:1px solid var(--line);
}

.hero__bg{
  position:absolute;
  inset:0;
  background:
    radial-gradient(800px 420px at 20% 20%, rgba(74,163,255,.22), transparent 60%),
    radial-gradient(700px 360px at 80% 25%, rgba(155,211,255,.18), transparent 60%),
    url('assets/hero.jpg') center/cover no-repeat;
  filter:saturate(1.10) contrast(1.05);
  transform:scale(1.02);
}

.hero__overlay{
  position:absolute;
  inset:0;
  background:linear-gradient(90deg, rgba(11,18,36,.70), rgba(11,18,36,.40), rgba(11,18,36,.74));
}

.hero__content{
  position:relative;
  z-index:2;
  padding:88px 0 70px 0;
}

.kicker{
  display:inline-flex;
  align-items:center;
  gap:10px;
  color:var(--muted);
  border:1px solid var(--line);
  padding:9px 12px;
  border-radius:999px;
  background:rgba(255,255,255,.03);
}

.h1{
  font-size:56px;
  letter-spacing:1.2px;
  margin:18px 0 10px 0;
  line-height:1.05;
  text-shadow:0 14px 40px rgba(0,0,0,.35);
}

.sub{
  font-size:18px;
  color:var(--muted);
  max-width:760px;
  line-height:1.7;
}

.actions{
  display:flex;
  gap:12px;
  margin-top:22px;
  flex-wrap:wrap;
}

.badges{
  display:flex;
  gap:10px;
  flex-wrap:wrap;
  margin-top:18px;
}

.badge{
  border:1px solid var(--line);
  border-radius:999px;
  padding:9px 12px;
  background:rgba(255,255,255,.03);
  color:var(--muted);
  font-weight:800;
}

/* Sections */
.section{
  padding:62px 0;
}

.section h2{
  font-size:30px;
  margin:0 0 10px 0;
  letter-spacing:.2px;
}

.section p{
  margin:0;
  color:var(--muted);
  line-height:1.8;
  max-width:900px;
}

/* Grid cards */
.grid{
  display:grid;
  grid-template-columns:repeat(12,1fr);
  gap:16px;
  margin-top:22px;
}

.card{
  grid-column:span 6;
  border:1px solid var(--line);
  background:linear-gradient(180deg, rgba(255,255,255,.07), rgba(255,255,255,.03));
  border-radius:var(--radius);
  padding:18px;
  box-shadow:var(--shadow2);
  backdrop-filter: blur(10px);
  transition: transform .18s ease, border-color .18s ease;
}

.card:hover{
  transform: translateY(-4px);
  border-color:rgba(155,211,255,.26);
}

.card h3{
  margin:0 0 6px 0;
  letter-spacing:.2px;
}

.card p{
  margin:0;
  color:var(--muted);
}

/* Lists (if you use them) */
.list{
  margin:14px 0 0 0;
  padding-left:18px;
  color:var(--muted);
  line-height:1.8;
}

/* Split layout (if you use it on other pages) */
.split{
  display:grid;
  grid-template-columns:1.25fr .75fr;
  gap:16px;
  margin-top:18px;
}

.panel{
  border:1px solid var(--line);
  background:linear-gradient(180deg, rgba(255,255,255,.06), rgba(255,255,255,.03));
  border-radius:var(--radius);
  padding:18px;
  box-shadow:var(--shadow2);
}

.mapgrid{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:10px;
  margin-top:10px;
}

.pill{
  border:1px solid var(--line);
  border-radius:14px;
  padding:10px;
  text-align:center;
  background:rgba(255,255,255,.02);
  color:var(--muted);
  font-weight:900;
}

/* Forms */
.form{ display:grid; gap:12px; margin-top:14px; }

.input, textarea{
  width:100%;
  padding:12px 14px;
  border-radius:14px;
  border:1px solid var(--line);
  background:rgba(255,255,255,.03);
  color:var(--text);
  outline:none;
}

.input:focus, textarea:focus{
  border-color:rgba(155,211,255,.32);
  box-shadow:0 0 0 4px rgba(74,163,255,.10);
}

textarea{
  min-height:120px;
  resize:vertical;
}

.small{ font-size:13px; color:var(--muted); }

.notice{
  border-left:4px solid var(--brand);
  padding:10px 12px;
  border-radius:12px;
  background:rgba(74,163,255,.10);
  color:var(--muted);
  margin-top:14px;
}

/* Footer */
.footer{
  border-top:1px solid var(--line);
  padding:28px 0;
  color:var(--muted);
}

.footer__row{
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:20px;
  flex-wrap:wrap;
}

.footer__brand{
  display:flex;
  align-items:center;
  gap:10px;
}

.footer__logo{ height:26px; width:auto; }

.footer a{
  color:var(--muted);
  transition: color .18s ease;
}
.footer a:hover{ color:var(--text); }

/* Responsive */
@media (max-width: 860px){
  .h1{ font-size:42px; }
  .card{ grid-column:span 12; }
  .split{ grid-template-columns:1fr; }
  .hero__content{ padding:78px 0 64px 0; }
}