* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;

    background: #111;
    font-family: Arial, sans-serif;
}

.login-box {
    width: 320px;
}

input {
    width: 100%;
    height: 48px;
    margin-bottom: 12px;
    padding: 0 15px;

    border: 1px solid #333;
    border-radius: 6px;

    background: #181818;
    color: white;

    font-size: 15px;
    outline: none;
}

input:focus {
    border-color: #777;
}

button {
    width: 100%;
    height: 48px;

    border: 0;
    border-radius: 6px;

    background: white;
    color: #111;

    font-size: 15px;
    font-weight: bold;
    cursor: pointer;
}

.error {
    margin-top: 15px;
    color: #ff7070;
    text-align: center;
    font-size: 13px;
}