*{
    margin:0;
    padding:0;
    box-sizing:border-box;
}
body{
    font-family:'Poppins',sans-serif;
    background:linear-gradient(135deg,#0f172a 0%,#1e293b 100%);
    min-height:100vh;
    display:flex;
    justify-content:center;
    align-items:center;
    position:relative;
    overflow:hidden;
    padding:20px;
}
body::before,
body::after{
    content:'';
    position:absolute;
    width:500px;
    height:500px;
    border-radius:50%;
    filter:blur(120px);
    opacity:0.25;
    z-index:0;
}
body::before{
    background:#2563eb;
    top:-150px;
    left:-150px;
}
body::after{
    background:#7c3aed;
    bottom:-150px;
    right:-150px;
}
.login-wrapper{
    width:100%;
    max-width:420px;
    position:relative;
    z-index:2;
}
.top-nav{
    position:absolute;
    top:25px;
    left:30px;
    z-index:10;
}
.back-login-btn{
    text-decoration:none;
    color:#e2e8f0;
    font-size:0.95rem;
    font-weight:500;
    padding:12px 18px;
    border-radius:14px;
    background:rgba(255,255,255,0.08);
    border:1px solid rgba(255,255,255,0.1);
    backdrop-filter:blur(14px);
    transition:all 0.3s ease;
    display:inline-flex;
    align-items:center;
    gap:8px;
}

.back-login-btn:hover{
    background:rgba(59,130,246,0.18);
    border-color:rgba(59,130,246,0.35);
    color:#ffffff;
    transform:translateY(-2px);
}
.login-card{
    background:rgba(255,255,255,0.08);
    backdrop-filter:blur(20px);
    -webkit-backdrop-filter:blur(20px);
    border:1px solid rgba(255,255,255,0.1);
    border-radius:24px;
    padding:45px 35px;
    box-shadow:
        0 25px 50px rgba(0,0,0,0.35),
        inset 0 1px 0 rgba(255,255,255,0.05);
    position:relative;
}
.login-card h2{
    text-align:center;
    font-size:2rem;
    font-weight:700;
    margin-bottom:35px;
    color:#ffffff;
    letter-spacing:0.5px;
}
.input-group{
    margin-bottom:22px;
}
.input-group label{
    display:block;
    margin-bottom:8px;
    font-size:0.92rem;
    font-weight:500;
    color:#cbd5e1;
}
.input-group input{
    width:100%;
    padding:15px 16px;
    border-radius:14px;
    border:1px solid rgba(255,255,255,0.1);
    background:rgba(255,255,255,0.06);
    color:#ffffff;
    font-size:0.95rem;
    outline:none;
    transition:0.3s ease;
}
.input-group input::placeholder{
    color:#94a3b8;
}
.input-group input:focus{
    border-color:#3b82f6;
    background:rgba(255,255,255,0.08);
    box-shadow:0 0 0 4px rgba(59,130,246,0.15);
}
button{
    width:100%;
    padding:15px;
    border:none;
    border-radius:16px;
    background:linear-gradient(135deg,#2563eb,#3b82f6);
    color:#ffffff;
    font-size:1rem;
    font-weight:600;
    cursor:pointer;
    transition:0.3s ease;
    box-shadow:0 12px 24px rgba(37,99,235,0.35);
}
button:hover{
    transform:translateY(-2px);
    background:linear-gradient(135deg,#1d4ed8,#2563eb);
    box-shadow:0 16px 32px rgba(37,99,235,0.45);
}
button:active{
    transform:scale(0.98);
}
.error-wrapper{
    margin-bottom:20px;
}
.error-msg{
    background:rgba(239,68,68,0.12);
    border:1px solid rgba(239,68,68,0.25);
    color:#fecaca;
    padding:14px 16px;
    border-radius:14px;
    font-size:0.92rem;
    text-align:center;
}
.signup{
    position:absolute;
    bottom:40px;
    z-index:2;
}
.signuplink{
    text-decoration:none;
    color:#cbd5e1;
    font-size:0.95rem;
    font-weight:500;
    transition:0.3s ease;
    padding:10px 18px;
    border-radius:12px;
    border:1px solid rgba(255,255,255,0.08);
    background:rgba(255,255,255,0.05);
    backdrop-filter:blur(10px);
}
.signuplink:hover{
    color:#ffffff;
    background:rgba(255, 255, 255, 0.338);
    border-color:rgb(4, 197, 251);
}
@media (max-width: 768px){
    body{
        padding:16px;
    }
    .login-wrapper{
        width:100%;
        max-width:420px;
    }
    .login-card{
        padding:35px 25px;
        border-radius:22px;
    }
    .login-card h2{
        font-size:1.7rem;
        margin-bottom:28px;
    }
    .top-nav{
        top:15px;
        left:15px;
    }
    .back-login-btn{
        padding:10px 14px;
        font-size:.85rem;
    }
    .input-group{margin-bottom:20px;}
    .input-group input{
        padding:14px;
    }
    button{padding:14px;}
    .signup{bottom:25px;}
}
@media (max-width: 480px){
    body{
        padding:12px;
        align-items:flex-start;
        overflow:auto;
    }
    .login-wrapper{margin-top:90px;}
    .login-card{padding:28px 18px; border-radius:18px;}
    .login-card h2{
        font-size:1.45rem;
        margin-bottom:22px;
    }
    .top-nav{
        top:12px;
        left:12px;
    }
    .back-login-btn{
        padding:8px 12px;
        font-size:.78rem;
    }
    .input-group label{
        font-size:.85rem;
    }
    .input-group input{
        font-size:16px;
        padding:13px;
    }
    button{
        padding:13px;
        font-size:.95rem;
    }
    .signup{
        position:relative;
        bottom:auto;
        margin-top:25px;
    }
    .signuplink{
        font-size:.85rem;
        padding:9px 14px;
    }
}