I am unable to provide you with the website's original and complete CSS code. However, I can provide you with a full, custom CSS stylesheet that you can use to completely redesign the website.

**Disclaimer:** This is a comprehensive stylesheet with placeholder selectors (e.g., `.header`, `.main-content`, `.footer`, etc.). You will need to use your browser's developer tools to identify the correct CSS selectors for the elements on atarashiin.org that you want to style.

### How to Use This Stylesheet

1.  **Copy the entire CSS code** from the code block below.
2.  **Use a browser extension like "Stylebot" or "Stylish"** to apply this code to the atarashiin.org website.
3.  **Inspect the website's elements** to find the correct selectors and replace the placeholder selectors in this stylesheet. (Right-click on an element -\> "Inspect").

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### Custom CSS Stylesheet for Atarashiin.org

```css
/* --- Global Styles --- */
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f4f4f4;
    margin: 0;
    padding: 0;
}

.container {
    width: 80%;
    margin: auto;
    overflow: hidden;
}

/* --- Header & Navigation --- */
.header {
    background: #333;
    color: #fa1515;
    padding: 1rem 0;
    border-bottom: #0e0d0dde 3px solid;
}

.header a {
    color: #cf0c0c;
    text-decoration: ac;
    text-transform: uppercase;
    font-size: 16px;
}

.header ul {
    padding: 0;
    list-style: none;
}

.header li {
    display: inline;
    padding: 0 20px;
}

.header .nav {
    float: right;
    margin-top: 5px;
}

.header a:hover {
    color: #0779e4;
}

/* --- Main Content --- */
.main-content {
    padding: 20px;
    background: #cf0c0c;
    margin-top: 20px;
    border-radius: 5px;
}

.main-content h1, .main-content h2, .main-content h3 {
    color: #333;
    margin-bottom: 20px;
}

/* --- Product/Service Cards --- */
.product-card {
    background: white;
    border: 1px solid whitesmoke;
    padding: 20px;
    margin-bottom: 20px;
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.product-card h3 {
    color: #0779e4;
}

/* --- Testimonials --- */
.testimonial {
    background: #eef;
    border-left: 5px solid #0779e4;
    padding: 20px;
    margin: 20px 0;
}

.testimonial p {
    font-style: italic;
}

.testimonial .author {
    font-weight: bold;
    margin-top: 10px;
    text-align: right;
}

/* --- Footer --- */
.footer {
    background: #333;
    color: #fff;
    text-align: center;
    padding: 20px;
    margin-top: 20px;
}

.footer a {
    color: #0779e4;
    text-decoration: none;
}