body{font-family:'Poppins',sans-serif;background:linear-gradient(135deg,#1a1a2e 0%,#16213e 100%);min-height:100vh}
    .glass-card{background:rgba(255,255,255,.1);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border-radius:20px;border:1px solid rgba(255,255,255,.18);box-shadow:0 8px 32px 0 rgba(0,0,0,.36)}
    .form-input{background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.2);transition:.3s}
    .form-input:focus{background:rgba(255,255,255,.15);border-color:rgba(255,255,255,.4);box-shadow:0 0 0 3px rgba(255,255,255,.1)}
    .form-tab{transition:.3s;position:relative}
    .form-tab.active{background:rgba(255,255,255,.15)}
    .form-tab.active::after{content:'';position:absolute;bottom:0;left:50%;transform:translateX(-50%);width:50%;height:3px;background:#4f46e5;border-radius:3px}
    .submit-btn{background:linear-gradient(135deg,#4f46e5 0%,#7c3aed 100%);box-shadow:0 4px 15px rgba(79,70,229,.3);transition:.3s}
    .submit-btn:hover{transform:translateY(-2px);box-shadow:0 6px 20px rgba(79,70,229,.4)}
    .social-btn{transition:.3s;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.2)}
    .social-btn:hover{transform:translateY(-3px);background:rgba(255,255,255,.2)}
    .form-section{display:none;animation:fadeIn .5s ease}
    .form-section.active{display:block}
    @keyframes fadeIn{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}