<div class="contain">

  <div class="wrapper">
    <div class="contacts">
      <h3>Our contacts</h3>

      <ul>
        <li>San Joe St.</li>
        <li>00-1212121-11</li>
        <li>[email protected]</li>
      </ul>
    </div>

    <div class="form">
      <h3>Send us a message</h3>
      <form action="">
        <p>
          <label for="">Your name</label>
          <input type="text">
        </p>
        <p>
          <label for="">Skype</label>
          <input type="text">
        </p>
        <p>
          <label for="">Email Address</label>
          <input type="text">
        </p>
        <p>
          <label for="">Topic</label>
          <input type="text">
        </p>
        <p class="full-width">
          <label for="">Write your message</label>
          <textarea name="" id="" cols="30" rows="7"></textarea>
        </p>
        <p class="full-width">
          <button>Send</button>
        </p>
      </form>
    </div>
  </div>
</div>

* {
  box-sizing: border-box;
}

body {
  padding: 1rem;
}

.contain {
  max-width: 1170px;
  margin-left: auto;
  margin-right: auto;
  padding: 1em;
}
@media (min-width: 600px) {
  .contain {
    padding: 0;
  }
}

h3,
ul {
  margin: 0;
}

h3 {
  margin-bottom: 1rem;
}

input:focus,
textarea:focus {
  outline: 3px solid gold;
}

input,
textarea,
button {
  width: 100%;
  border: 1px solid #000;
}

.wrapper {
  box-shadow: 0 0 5px 0 rgba(0, 0, 0, 0.2);
}
.wrapper > * {
  padding: 1em;
}
@media (min-width: 700px) {
  .wrapper {
    display: grid;
    grid-template-columns: 1fr 2fr;
  }
  .wrapper > * {
    padding: 2em 2em;
  }
}

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

.contacts {
  background: #4b5195;
  color: #fff;
}

.form {
  background: #fff;
}

form {
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-gap: 20px;
}
form label {
  display: block;
}
form p {
  margin: 0;
}

.full-width {
  grid-column: 1 / 3;
}

button,
input,
textarea {
  padding: 1em;
}

button {
  background: lightgrey;
  width: 100%;
  border: 0;
}
button:hover, button:focus {
  background: gold;
  outline: 0;
}