:root{--bg:#050505;--blue:#00A8FF}
body{margin:0;background:var(--bg);color:white;font-family:Segoe UI}
.hidden{display:none}
.overlay{height:100vh;display:flex;justify-content:center;align-items:center;
background:linear-gradient(135deg,#050505,#00A8FF)}
.glass{background:rgba(255,255,255,.08);backdrop-filter:blur(20px)}
.card{padding:30px;border-radius:20px;width:340px}
.sidebar{position:fixed;width:240px;height:100vh;background:#101010;padding:20px}
main{margin-left:260px}
.hero{padding:120px 40px}
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:15px;padding:20px}
.box{background:#181818;padding:20px;border-radius:16px}
input,select,textarea,button{width:100%;padding:12px;margin:6px 0;border-radius:10px}
section{padding:20px 40px}
@media(max-width:768px){.sidebar{position:relative;width:auto;height:auto}main{margin:0}}