/* common */
* {
  box-sizing: border-box;
}

body {
  background-color: #fff;
  color: #333;
  font: 1.2em / 1.5 Helvetica Neue, Helvetica, Arial, sans-serif;
  padding: 0;
  margin: 0;
}

button {
  cursor: pointer;
}

section {
  padding: 50px 0;
  text-align: center;
}

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

/* components */

.task-title {
  font-size: 20px;
  font-style: italic;
  font-weight: 500;
  text-decoration: underline;
  margin-bottom: 100px;
}

.container {
  width: 1440px;
  margin: 0 auto;
  padding: 0px 40px;
}

.module-title {
  text-align: center;
}

.number-container {
  display: flex;
  flex-wrap: wrap;
}

.number {
  width: 50px;
  height: 50px;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 18px;
  font-weight: 700;

  margin: 5px;
}

.even {
  background-color: #8bc34a;
}

.odd {
  background-color: #ffed3b;
}

/* form styles */
.contact-form {
  display: flex;
  flex-direction: column;
  width: 600px;
  margin: 0 auto;
  padding: 20px;
  box-shadow: 0px 5px 10px 2px rgba(34, 60, 80, 0.2);
}
.contact-form-input {
  height: 40px;
  border: 1px solid #cccccc;
  padding-left: 20px;
  margin-bottom: 20px;
}

.contact-form-btn {
  margin-top: 20px;
}

.success {
  outline: 3px solid greenyellow;
}

.error {
  outline: 3px solid red;
}

span {
  text-decoration: underline;
}

/* Box */
.box {
  width: 50px;
  height: 50px;
  border: 2px dashed red;
  margin: 10px;
}

.active {
  color: red;
}