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

body{
    font-family:Arial, Helvetica, sans-serif;
    background:#f5f7f5;
    color:#333;
    line-height:1.6;
}

/* HEADER */

header{
    background:#ffffff;
    box-shadow:0 2px 10px rgba(0,0,0,0.08);
    position:sticky;
    top:0;
    z-index:100;
}

.header-container{
    max-width:1200px;
    margin:auto;
    padding:15px 20px;
    display:flex;
    justify-content:space-between;
    align-items:center;
}

.logo-img{
    height:58px;
    width:auto;
    display:block;
}

nav ul{
    display:flex;
    align-items:center;
    gap:30px;
    list-style:none;
}

nav ul li a{
    text-decoration:none;
    color:#2e7d32;
    font-weight:600;
    transition:0.3s;
}

nav ul li a:hover{
    color:#1b5e20;
}

/* MAIN SECTION */

.main-container{
    max-width:1200px;
    margin:50px auto;
    padding:0 20px;
    display:flex;
    align-items:center;
    gap:40px;
}

.form-box{
    flex:1;
    background:#ffffff;
    padding:35px;
    border-radius:15px;
    box-shadow:0 10px 25px rgba(0,0,0,0.08);
}

.top-icon{
    text-align:center;
    margin-bottom:20px;
}

.matic-icon{
    width:90px;
    height:90px;
    object-fit:contain;
    display:block;
    margin:0 auto;
}

.form-box h2{
    text-align:center;
    color:#2e7d32;
    margin-bottom:10px;
    font-size:30px;
}

.form-box p{
    text-align:center;
    color:#666;
    margin-bottom:25px;
}

.input-group{
    position:relative;
    margin-bottom:18px;
}

.input-group i{
    position:absolute;
    top:15px;
    left:15px;
    color:#2e7d32;
    font-size:16px;
}

.input-group input{
    width:100%;
    padding:14px 15px 14px 45px;
    border:1px solid #dcdcdc;
    border-radius:8px;
    font-size:15px;
    outline:none;
    transition:0.3s;
}

.input-group input:focus{
    border-color:#2e7d32;
    box-shadow:0 0 0 3px rgba(46,125,50,0.10);
}

.btn{
    width:100%;
    border:none;
    background:#2e7d32;
    color:#fff;
    padding:15px;
    border-radius:8px;
    cursor:pointer;
    font-size:16px;
    font-weight:700;
    transition:0.3s;
}

.btn:hover{
    background:#1b5e20;
}

.btn:disabled{
    opacity:0.7;
    cursor:not-allowed;
}

#message{
    margin-top:20px;
    text-align:center;
}

/* LOADER */

.loading-box{
    text-align:center;
    color:#2e7d32;
    font-weight:600;
}

.loader{
    width:55px;
    height:55px;
    border:5px solid #dddddd;
    border-top:5px solid #2e7d32;
    border-radius:50%;
    margin:0 auto 15px;
    animation:spin 1s linear infinite;
}

@keyframes spin{
    100%{
        transform:rotate(360deg);
    }
}

/* MESSAGE BOXES */

.success-box{
    background:#f1f8f1;
    border-left:4px solid #2e7d32;
    padding:15px;
    border-radius:6px;
    text-align:left;
}

.error-box{
    background:#fff3f3;
    border-left:4px solid #d32f2f;
    color:#d32f2f;
    padding:15px;
    border-radius:6px;
    text-align:left;
}

.demo-box{
    background:#f1f8f1;
    border-left:4px solid #2e7d32;
    padding:15px;
    border-radius:6px;
    text-align:left;
}

/* RIGHT IMAGE */

.right-sidebar{
    flex:1;
}

.right-sidebar img{
    width:100%;
    border-radius:15px;
    box-shadow:0 10px 25px rgba(0,0,0,0.08);
}

/* FEATURES */

.section{
    padding:70px 20px;
}

.container{
    max-width:1200px;
    margin:auto;
}

.box-grid{
    display:grid;
    grid-template-columns:repeat(auto-fit,minmax(250px,1fr));
    gap:25px;
}

.feature-box{
    background:#ffffff;
    padding:30px;
    border-radius:12px;
    text-align:center;
    box-shadow:0 5px 20px rgba(0,0,0,0.08);
    transition:0.3s;
}

.feature-box:hover{
    transform:translateY(-5px);
}

.icon{
    font-size:40px;
    color:#2e7d32;
    margin-bottom:15px;
}

.feature-box h3{
    margin-bottom:10px;
    color:#222;
}

.feature-box p{
    color:#666;
}

/* FOOTER */

footer{
    background:#1b5e20;
    padding:25px 15px;
}

footer ul{
    list-style:none;
    display:flex;
    justify-content:center;
    gap:30px;
    flex-wrap:wrap;
}

footer ul li a{
    color:#ffffff;
    text-decoration:none;
    transition:0.3s;
}

footer ul li a:hover{
    opacity:0.8;
}

/* TABLET */

@media(max-width:992px){

.main-container{
    gap:25px;
}

.form-box{
    padding:25px;
}

}

/* MOBILE */

@media(max-width:768px){

.header-container{
    flex-direction:column;
    gap:15px;
}

nav ul{
    flex-wrap:wrap;
    justify-content:center;
    gap:15px;
}

.main-container{
    flex-direction:column;
    margin:30px auto;
}

.logo-img{
    height:48px;
}

.matic-icon{
    width:75px;
    height:75px;
}

.form-box h2{
    font-size:24px;
}

.right-sidebar{
    width:100%;
}

}

/* SMALL MOBILE */

@media(max-width:480px){

.form-box{
    padding:20px;
}

.input-group input{
    font-size:14px;
}

.btn{
    font-size:15px;
}

}
```