Version 4.1.2 css file & submit button

Hi guys, really hope you can help me
I’m literally going crazy trying to customize this plugin
First of all I’m using last CF7 version 4.1.2 with wordpress 4.1.1 and the Socha template by alethemes.
First question:
In this version I can’t see a styles.css file but i have to enter inside ” contact-form-7/admin/admin.php” and then i see “contact-form-7/admin/styles/styles.css” but it doesn’t seem to be the right one as you can see below.
I have been able to customize some options via the custom css field in my template and this is the result: elsendero.it/web but i have tried all the possible customizations i found on the web to change the submit button but noone works…no way. I have to sat that the plugin didn’t work well with the style also with his default installation showing me all the textareas white instead of grey and now is not showing the suggestions in the textareas…
Can someone help me please?
Thank you very much in advance
Alex

PS This is the entire file
Where can i find here all the characteristics of the submit button?

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#icon-wpcf7 {
background: transparent url(../images/screen-icon.png) no-repeat 2px 1px;
}

div.wrap div.cf7com-links {
text-align: right;
font-size: .9em;
margin: -20px 1em 1em 0;
}

div.wrap div.cf7com-links a {
text-decoration: none;
font-weight: bold;
}

#titlediv {
margin-bottom: 20px;
position: relative;
border: 1px solid #c7c7c7;
padding: 6px;
background-color: #fff;
}

div.save-contact-form {
padding: 1.4em 0 0 0;
text-align: right;
}

div.actions-link {
position: absolute;
top: 0;
right: 0;
margin: 0;
padding: 6px;
}

div.actions-link input {
padding: 0;
margin: 0;
border: none;
font-size: 11px;
cursor: pointer;
background: inherit;
}

div.actions-link input.copy {
color: #006505;
}

div.actions-link input.delete {
color: #bc0b0b;
}

input#wpcf7-title {
color: #5f5f5f;
border: none;
font-weight: bold;
font-size: 1.5em;
cursor: pointer;
background-color: transparent;
box-shadow: none;
width: 80%;
}

input#wpcf7-title.focus {
color: #3f3f3f;
border: 1px solid #aaa;
cursor: text;
background-color: transparent;
box-shadow: inset 0 1px 2px rgba(0,0,0,0.07);
}

input#wpcf7-title.mouseover {
background-color: #ffffdd;
}

p.tagcode {
color: #333;
margin: 2ex 0 1ex 0;
}

input#contact-form-anchor-text, input#contact-form-anchor-text-old {
width: 100%;
}

.postbox .half, .postbox .half-left, .postbox .half-right {
float: left;
width: 50%;
}

.postbox .half-right > * {
margin-left: 10px;
}

@media only screen and (max-width: 768px) {
.postbox .half, .postbox .half-left, .postbox .half-right {
width: 100%;
}

.postbox .half-right {
margin-top: 1em;
}

.postbox .half-right > * {
margin-left: inherit;
}
}

.postbox .mail-field, .postbox .message-field {
margin-top: 6px;
margin-bottom: 8px;
}

.postbox .mail-field label, .postbox .message-field label {
line-height: 1.4em;
}

div.pseudo-hr {
border-bottom: 1px solid transparent;
margin: 8px 0;
}

input, textarea {
border: 1px solid #dfdfdf;
}

input.wide {
width: 100%;
}

textarea {
width: 100%;
}

label.disabled {
color: #777;
}

#messagesdiv .hide-initially {
display: none;
}

div.tag-generator {
position: relative;
background: transparent;
padding: 0 0 5px 1px;
}

div.tg-pane {
border: 1px solid #e1e1e1;
background: #f7f7f7;
margin: 1ex 0 0 0;
padding: 10px;
line-height: 140%;
}

div.tg-pane table {
width: 100%;
margin: 0 0 0.7em 0;
}

div.tg-pane table caption {
text-align: left;
padding: 0 0 0.2em 0;
font-weight: bolder;
color: #777;
}

div.tg-pane table code {
background-color: inherit;
}

div.tg-pane table td {
vertical-align: top;
width: 50%;
border: none;
padding: 2px 0;
}

div.tg-pane input.tag, div.tg-pane input.mail-tag {
width: 100%;
font-size: 90%;
}

div.tg-pane input.mail-tag {
width: 65%;
}

div.tg-mail-tag {
margin-top: 2.4em;
text-align: right;
}

div.tg-pane input.tg-name {
border-color: #555;
}

div.tg-pane input.oneline {
width: 94%;
font-size: smaller;
-moz-box-sizing: border-box;
}

div.tg-pane textarea {
width: 94%;
height: 100px;
font-size: smaller;
}

div.tg-pane div.tg-tag {
margin: .4em 0;
}

div.tg-dropdown {
position: absolute;
top: 26px;
left: 0;
z-index: 10;
border: 1px solid #ddd;
}

span.tg-closebutton {
color: #777;
font: bold 18px monospace;
padding: 1px 4px;
cursor: pointer;
}

div.tg-panetitle {
font-weight: bold;
font-size: 1.5em;
margin: 0 0 .5em;
color: #5f5f5f;
}

.fixed .column-title {
width: 32%;
}

input.shortcode-in-list-table {
width: 100%;
font-size: 90%;
}

input[readonly].code {
background: #f3f3f3;
color: #3f3f3f;
}

/* welcome panel */
.welcome-panel p.message {
line-height: 1.4em;
margin-right: 25px;
}

.welcome-panel li {
margin-bottom: 12px;
}

.welcome-panel-close {
z-index: 2;
}

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