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

html,
body{
    width:100%;
    height:100%;
    font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
    background:#f7f7f7;
}

body{
    display:flex;
    justify-content:center;
    align-items:center;
}

/* Форма */

form{
    width:100%;
    max-width:380px;

    display:flex;
    flex-direction:column;
    gap:16px;

    padding:36px;

    background:#fff;

    border:1px solid #e5e5e5;
    border-radius:12px;

    box-shadow:0 8px 30px rgba(0,0,0,.04);
}

/* Поля */

input{
    width:100%;
    height:44px;

    padding:0 14px;

    border:1px solid #d8d8d8;
    border-radius:8px;

    background:#fff;

    outline:none;

    font:inherit;

    transition:
        border-color .15s,
        box-shadow .15s;
}

input::placeholder{
    color:#9b9b9b;
}

input:focus{
    border-color:#333;
    box-shadow:0 0 0 3px rgba(0,0,0,.06);
}

/* Кнопка */

button{
    height:44px;

    border:none;
    border-radius:8px;

    background:#222;
    color:#fff;

    font:inherit;
    font-weight:500;

    cursor:pointer;

    transition:
        background .15s,
        transform .08s;
}

button:hover{
    background:#111;
}

button:active{
    transform:scale(.98);
}

/* Ошибка */

p{
    position:fixed;
    top:calc(50% + 170px);

    color:#d32f2f;
    font-size:14px;
    text-align:center;
}