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

body{
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background: linear-gradient(135deg, #000, #0f172a);
}

.container{
    width: 420px;
    padding: 25px;
    background: rgba(0,0,0,0.7);
    border: 1px solid #0ef;
    border-radius: 15px;
    box-shadow: 0 0 25px rgba(0, 238, 255, 0.3);
    backdrop-filter: blur(10px);
}

.base h3{
    text-align: center;
    color: #0ef;
    font-size: 28px;
    margin-bottom: 20px;
    letter-spacing: 1px;
}

.block{
    display: flex;
    flex-direction: column;
    margin-bottom: 15px;
}

.title{
    color: #0ef;
    margin-bottom: 5px;
    font-size: 16px;
}

input[type=text]{
    padding: 12px;
    border-radius: 8px;
    border: 1px solid #333;
    background: #111;
    color: #fff;
    outline: none;
    transition: 0.3s;
}

input[type=text]:focus{
    border-color: #0ef;
    box-shadow: 0 0 10px #0ef;
}

input[type=button]{
    width: 100%;
    padding: 12px;
    margin-top: 10px;
    background: #0ef;
    border: none;
    border-radius: 8px;
    font-size: 18px;
    cursor: pointer;
    font-weight: bold;
    transition: 0.3s;
}

input[type=button]:hover{
    background: transparent;
    color: #0ef;
    border: 1px solid #0ef;
}

#age{
    margin-top: 20px;
    text-align: center;
    color: white;
    font-size: 18px;
}