*{margin:0;padding:0;box-sizing:border-box;font-family:'Segoe UI',sans-serif}

body{
    height:100vh;
    display:flex;
    align-items:center;
    justify-content:center;
    background:linear-gradient(135deg,#74b9ff,#0984e3);
}

.login-wrap{
    background:#fff;
    padding:40px 30px;
    border-radius:15px;
    box-shadow:0 8px 25px rgba(0,0,0,0.2);
    width:100%;
    max-width:380px;
    text-align:center;
    animation:fadeIn 0.6s ease;
}

.login-wrap h2{
    margin-bottom:25px;
    font-size:22px;
    color:#2d3436;
    font-weight:600;
}


.form input{
    width:100%;
    padding:12px 14px;
    margin:10px 0;
    border:1px solid #dfe6e9;
    border-radius:8px;
    font-size:15px;
    transition:all .3s;
}

.form input:focus{
    border-color:#0984e3;
    box-shadow:0 0 5px rgba(9,132,227,0.5);
    outline:none;
}


.captcha-wrap{
    display:flex;
    align-items:center;
    justify-content:space-between;
    margin:12px 0;
}

.captcha-wrap input{
    flex:1;
    margin-right:10px;
}

.captcha{
    background:#0984e3;
    color:#fff;
    font-weight:bold;
    padding:10px 14px;
    border-radius:8px;
    font-size:16px;
    letter-spacing:2px;
    user-select:none;
}


button{
    width:100%;
    padding:12px;
    background:#0984e3;
    color:#fff;
    font-size:16px;
    border:none;
    border-radius:8px;
    cursor:pointer;
    font-weight:600;
    margin-top:10px;
    transition:all .3s;
}

button:hover{
    background:#74b9ff;
}

/* Hiệu ứng */
@keyframes fadeIn{
    from{opacity:0;transform:translateY(-20px)}
    to{opacity:1;transform:translateY(0)}
}

/* Responsive */
@media(max-width:480px){
    .login-wrap{
        padding:30px 20px;
    }
}