*{
    margin:0;
    padding:0;
    box-sizing:border-box;
}
.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);
}

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;
    padding:40px 20px;
    color:#fff;
}

.signup-wrapper{
    width:100%;
    max-width:700px;
}

.signup-card{
    background:rgba(255,255,255,0.08);
    backdrop-filter:blur(18px);
    -webkit-backdrop-filter:blur(18px);
    border:1px solid rgba(255,255,255,0.1);
    border-radius:24px;
    padding:40px;
    box-shadow:
        0 20px 40px rgba(0,0,0,0.35),
        inset 0 1px 0 rgba(255,255,255,0.05);
}

.signup-card h2{
    font-size:2rem;
    font-weight:700;
    margin-bottom:30px;
    text-align:center;
    color:#ffffff;
}
form{
    display:grid;
    grid-template-columns:1fr 1fr;
    gap:20px;
}
.input-group{
    display:flex;
    flex-direction:column;
}
.input-group label{
    margin-bottom:8px;
    font-size:0.92rem;
    font-weight:500;
    color:#cbd5e1;
}
.input-group input,
.input-group select,
.input-group textarea{
    width:100%;
    padding:14px 16px;
    border-radius:14px;
    border:1px solid rgba(255,255,255,0.1);
    background:rgba(255,255,255,0.06);
    color:#fff;
    font-size:0.95rem;
    outline:none;
    transition:0.3s ease;
}
.input-group textarea{
    resize:vertical;
    min-height:120px;
}
.input-group input::placeholder,
.input-group textarea::placeholder{
    color:#94a3b8;
}
.input-group input:focus,
.input-group select:focus,
.input-group textarea:focus{
    border-color:#3b82f6;
    background:rgba(255,255,255,0.08);
    box-shadow:0 0 0 4px rgba(59,130,246,0.15);
}
.input-group select option{
    background:#0f172a;
    color:#fff;
}
.input-group textarea,
button{
    grid-column:1 / -1;
}

button{
    margin-top:10px;
    padding:16px;
    border:none;
    border-radius:16px;
    background:linear-gradient(135deg,#2563eb,#3b82f6);
    color:#fff;
    font-size:1rem;
    font-weight:600;
    cursor:pointer;
    transition:0.3s ease;
    box-shadow:0 10px 20px rgba(37,99,235,0.35);
}
button:hover{
    transform:translateY(-2px);
    background:linear-gradient(135deg,#1d4ed8,#2563eb);
    box-shadow:0 15px 30px rgba(37,99,235,0.45);
}
button:active{
    transform:scale(0.98);
}
button:disabled{
    opacity:0.7;
    cursor:not-allowed;
}
.error-wrapper,
.success-wrapper{
    margin-bottom:20px;
    grid-column:1 / -1;
}
.error-msg{
    background:rgba(239,68,68,0.15);
    border:1px solid rgba(239,68,68,0.35);
    color:#fecaca;
    padding:14px 16px;
    border-radius:14px;
    font-size:0.92rem;
    margin-bottom: 10px;
}
.error-msg:last-child {
    margin-bottom: 0;
}
.success-msg{
    background:rgba(34,197,94,0.15);
    border:1px solid rgba(34,197,94,0.35);
    color:#bbf7d0;
    padding:14px 16px;
    border-radius:14px;
    font-size:0.92rem;
}
@media (max-width:768px){
    body{
        padding:25px 16px;
        align-items:flex-start;
    }
    .top-nav{
        top:15px;
        left:15px;
    }
    .back-login-btn{
        padding:10px 14px;
        font-size:.85rem;
    }
    .signup-wrapper{margin-top:80px;}

    .signup-card{
        padding:28px;
        border-radius:20px;
    }
    .signup-card h2{
        font-size:1.7rem;
        margin-bottom:25px;
    }
    form{
        grid-template-columns:1fr;
        gap:16px;
    }
    .input-group label{
        font-size:.88rem;
    }
    .input-group input,
    .input-group select,
    .input-group textarea{
        padding:13px 14px;
        font-size:16px;
    }
    .signup-card button{padding:14px;}
}
@media (max-width:480px){

    body{
        padding:15px 12px;
        overflow:auto;
    }

    .top-nav{
        top:12px;
        left:12px;
    }

    .back-login-btn{
        padding:8px 12px;
        font-size:.78rem;
    }
    .signup-wrapper{
        margin-top:75px;
    }
    .signup-card{
        padding:22px 16px;
        border-radius:18px;
    }
    .signup-card h2{
        font-size:1.45rem;
        margin-bottom:20px;
    }
    form{gap:14px;}
    .input-group label{
        font-size:.82rem;
    }
    .input-group input,
    .input-group select,
    .input-group textarea{
        padding:12px;
        font-size:16px;
        border-radius:12px;
    }
    .input-group textarea{min-height:100px;}
    .signup-card button{
        padding:13px;
        font-size:.95rem;
    }
    .error-msg,
    .success-msg{
        padding:12px;
        font-size:.85rem;
    }
}