*{

margin:0;

padding:0;

box-sizing:border-box;

font-family:Arial,sans-serif;

}

body{

background:linear-gradient(135deg,#0f172a,#1e3a8a,#2563eb);

min-height:100vh;

display:flex;

justify-content:center;

align-items:center;

padding:20px;

}

.container{

width:100%;

max-width:450px;

background:#fff;

padding:35px;

border-radius:20px;

box-shadow:0 15px 35px rgba(0,0,0,.35);

text-align:center;

}

.logo{

width:80px;

height:80px;

margin:auto;

background:gold;

border-radius:50%;

display:flex;

align-items:center;

justify-content:center;

font-size:40px;

margin-bottom:15px;

}

h1{

color:#1d4ed8;

margin-bottom:10px;

}

.subtitle{

color:#666;

margin-bottom:30px;

}

input{

width:100%;

padding:15px;

font-size:16px;

border:2px solid #ddd;

border-radius:10px;

margin-bottom:20px;

outline:none;

}

input:focus{

border-color:#2563eb;

}

button{

width:100%;

padding:15px;

background:#2563eb;

color:white;

border:none;

border-radius:10px;

font-size:18px;

font-weight:bold;

cursor:pointer;

transition:.3s;

}

button:hover{

background:#1d4ed8;

}

button:disabled{

background:#9ca3af;

cursor:not-allowed;

}

#msg{

margin-top:20px;

font-weight:bold;

font-size:16px;

min-height:24px;

}

.footer{

margin-top:30px;

font-size:15px;

}

.footer a{

color:#2563eb;

font-weight:bold;

text-decoration:none;

}

.footer a:hover{

text-decoration:underline;

}

@media(max-width:500px){

.container{

padding:25px;

}

h1{

font-size:28px;

}

}