style.css

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

body, input, button, select, textarea {
    font-family: 'Poppins', sans-serif;
}

body {
    background: #E5E5E5;
}

body::before{
    content: '';
    width: 100%;
    height: 368px;

    position: absolute; 
    top:0;
    left:0; 
    z-index: -1;
    background: #121214; 
}

.page {
    margin: auto;
    width: 736px;
}

header {
    width: 319px; 

    margin-top: 74px;
    margin-left: 70px; 
}

header h1 {
    font-family: 'Archivo', sans-serif;
    font-weight: bold;
    font-size: 36px; 
    line-height: 42px;
    color: white; 
    margin-bottom: 24px;
}

header p {
    font-size: 16px;
    line-height: 26px;
    color: #42D3FF;
}

form {
    background: #FAFAFC;
    min-height: 300PX;
    margin-top: 38px;
    padding: 65px;
    border-radius: 8px 8px 0 0;

    display: flex;
    flex-direction: column;
    gap: 48px;
}

fieldset {
    border: none;
}

.fieldset.wrapper {
    display: flex; 
    flex-direction: column; 
    gap: 24px; 
}

fieldset legend {
    font-family: 'Archivo', sans-serif;
    font-weight: 600;
    font-size: 24px;
    line-height: 34px;

    width: 100%; 
    border-bottom: 1px solid #E6E6F0; 
    padding-bottom: 16px;
}

.input-wrapper {
    display: flex; 
    flex-direction: column;
}

.input-wrapper label,
.checkbox-wrapper label {
    font-size: 14px; 
    line-height: 24px;
    color: #4E4958; 

    margin-bottom: 8px; 
}

.input-wrapper label span:hover {
    color: #6c6a71; 
}

.input-wrapper label span {
    margin-left: 12px; 

    font-size: 12px; 
    line-height: 20px;

    color: #97949e; 
} 

.input-wrapper input, 
.input-wrapper textarea,
.input-wrapper select {
    background: #FAFAFC;
    border: 1px solid #E6E6F0; 
    border-radius: 8px; 
    
    height: 56px; 

    padding: 0 24px; 
    font-size: 16px; 
    line-height: 26px; 

    color: #6c6a71; 
}

.input-wrapper textarea {
    padding: 0;
    height: 168px; 
}

.col-3 {
    display: flex; 
    gap: 20px; 
}

.col-3 > div:nth-child(1) {
    width: 100%; 
}

.checkbox-wrapper {
    display: flex;
    align-items: center; 
    gap: 6px; 
}

.checkbox-wrapper label {
    margin: 0; 
}

footer {
    background: #F0F0F4;
    height: 136px;
    display: flex; 
    flex-direction: column;

    padding: 40px 64px; 

    margin-bottom: 100px;

    border-top: 1px solid #d6d6d6;
    border-radius: 0 0 8px 8px; 
}

footer .button {
    height: 56px; 
    background: #04D361;
    border: 0;
    border-radius: 8px;

    font-family: 'Archivo';

    font-weight: 600; 
    font-size: 16px; 
    line-height: 26px; 

    color: #FFFFFF; 
}

footer .button:hover {
    background: #05803c;
}