:root {
  --bg:#000;
  --text:#f5f6fb;
  --muted:#9aa5b1;
  --accent:#ff6600;
  --line:rgba(255,255,255,0.12);
  --glass:rgba(255,255,255,0.06);
  --transition:all .3s ease;
}

*{box-sizing:border-box;margin:0;padding:0}
body{
  font-family:'Archivo',sans-serif;
  background:radial-gradient(1000px 600px at 50% -10%,#0b0b11,#000);
  color:var(--text);
  display:flex;
  flex-direction:column;
  min-height:100vh;
}

.iv-header{
  display:flex;
  justify-content:flex-end;
  align-items:center;
  padding:16px 36px;
  background:rgba(0,0,0,0.4);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
  position:sticky;
  top:0;
  z-index:10;
}
.iv-logo{width:120px;height:auto;}

.iv-main{flex:1;display:flex;flex-direction:column;align-items:center;text-align:center;padding:20px;}

.iv-title{
  font-family:'Orbitron',sans-serif;
  font-size:3rem;
  letter-spacing:0.15em;
  margin-bottom:20px;
  text-transform:uppercase;
}

.iv-tabs{
  display:flex;
  justify-content:center;
  gap:18px;
  margin-bottom:14px;
}

.tab-btn{
  background:var(--glass);
  border:1px solid var(--line);
  color:var(--text);
  padding:10px 22px;
  border-radius:12px;
  cursor:pointer;
  font-weight:700;
  letter-spacing:.05em;
  transition:var(--transition);
}
.tab-btn:hover{border-color:var(--accent);color:var(--accent);box-shadow:0 0 14px var(--accent);}
.tab-btn.active{
  border-color:var(--accent);
  color:var(--accent);
  box-shadow:0 0 18px var(--accent);
}

.iframe-wrap{
  width:100%;
  max-width:1100px;
  flex:1;
  display:flex;
  justify-content:center;
  align-items:center;
  background:var(--glass);
  border-radius:12px;
  border:1px solid var(--line);
  overflow:hidden;
  animation:fadeIn 0.4s ease;
}

iframe{
  width:100%;
  height:80vh;
  border:none;
  animation:fadeIn .4s ease;
}

.iv-footer{
  text-align:center;
  color:var(--muted);
  font-size:.95rem;
  padding:24px;
  border-top:1px solid var(--line);
  margin-top:20px;
}

@keyframes fadeIn{
  from{opacity:0;transform:translateY(6px);}
  to{opacity:1;transform:translateY(0);}
}

@media (max-width:700px){
  .iv-title{font-size:2rem;}
  .tab-btn{padding:8px 14px;font-size:.9rem;}
  iframe{height:70vh;}
}