:root{
  --bg:#0c1224;
  --panel:rgba(245,248,255,.08);
  --accent:#5fa8ff;
  --accent2:#7fd3ff;
  --glow:rgba(127,211,255,.45);
  --text:#eef4ff;
  --muted:#b8c7e6;
}
*{box-sizing:border-box}
html,body{
  margin:0;padding:0;
  background:
    radial-gradient(1200px 700px at 20% 10%, rgba(127,211,255,.22), transparent 60%),
    radial-gradient(900px 600px at 80% 30%, rgba(95,168,255,.18), transparent 60%),
    linear-gradient(180deg,#0c1224,#0a0f1e);
  color:var(--text);
  font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto;
}
a{text-decoration:none;color:var(--accent)}
header{
  padding:26px 44px 22px;
  border-bottom:1px solid rgba(127,211,255,.25);
  backdrop-filter: blur(6px);
}
.brand{
  display:flex;align-items:center;gap:16px;
}
.brand img{
  width:42px;height:42px;
  filter: drop-shadow(0 0 18px var(--glow));
}
.brand-title h1{
  margin:0;font-size:30px;font-weight:700;
}
.brand-title span{
  font-size:13px;color:var(--muted);
}
nav{
  display:flex;gap:14px;margin-top:18px;flex-wrap:wrap;
}
.nav-tab{
  padding:10px 18px;
  border-radius:18px;
  background:rgba(255,255,255,.06);
  color:var(--muted);
  font-weight:600;
  transition:all .25s ease;
}
.nav-tab:hover{
  color:#fff;
  box-shadow:0 0 0 1px rgba(127,211,255,.35), 0 0 22px rgba(127,211,255,.25);
}
.nav-tab.active{
  color:#fff;
  background:linear-gradient(135deg, rgba(127,211,255,.35), rgba(95,168,255,.35));
  box-shadow:0 0 0 1px rgba(127,211,255,.55), 0 0 28px rgba(127,211,255,.45);
}
.container{
  max-width:1200px;margin:56px auto;padding:0 28px;
}
.card{
  background:var(--panel);
  border-radius:28px;
  padding:34px;
  box-shadow:0 20px 60px rgba(0,0,0,.35);
}
h2{margin-top:0;color:#d9e9ff}
footer{
  text-align:center;padding:46px;color:var(--muted);font-size:13px;
}
.sidebar{
  background:rgba(255,255,255,.05);
  border-radius:24px;
  padding:22px;
}