* { box-sizing: border-box; }

    html, body {
        margin: 0;
        width: 100%;
        height: 100%;
        font-family: Arial, Helvetica, sans-serif;
    }

    body {
        display: flex;
        align-items: center;
        justify-content: center;
        background:
            radial-gradient(circle at 50% 35%, #454a50 0%, #30343a 42%, #202328 100%);
        color: #e8e8e8;
    }

    .login-box {
        width: min(360px, calc(100% - 40px));
        padding: 32px 30px 28px;
        background: rgba(30, 33, 37, 0.96);
        border: 1px solid rgba(255,255,255,0.08);
        border-radius: 10px;
        box-shadow: 0 18px 45px rgba(0,0,0,0.45);
    }

    .logo {
        text-align: center;
        font-size: 25px;
        font-weight: 600;
        letter-spacing: 0.3px;
        margin-bottom: 7px;
    }

    .subtitle {
        text-align: center;
        color: #92979d;
        font-size: 13px;
        margin-bottom: 26px;
    }

    label {
        display: block;
        margin: 0 0 7px;
        color: #aeb2b6;
        font-size: 13px;
    }

    input {
        width: 100%;
        height: 43px;
        margin-bottom: 17px;
        padding: 0 12px;
        border: 1px solid #4b5056;
        border-radius: 6px;
        outline: none;
        background: #272b30;
        color: #f0f0f0;
        font-size: 14px;
    }

    input:focus {
        border-color: #70767d;
    }

    button {
        width: 100%;
        height: 43px;
        margin-top: 3px;
        border: 0;
        border-radius: 6px;
        background: #555b62;
        color: #fff;
        font-size: 14px;
        cursor: pointer;
    }

    button:hover {
        background: #626970;
    }

    .footer {
        text-align: center;
        margin-top: 20px;
        color: #686d73;
        font-size: 11px;
    }