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

body {
  font-family: "Arial", sans-serif;
  line-height: 1.6;
  color: #333;
  background-color: #f5f5f5;
}

.header {
  background-color: #45a049;
  color: white;
  text-align: center;
  padding: 20px;
  margin-bottom: 20px;
}

.header__title {
  margin: 0;
  font-size: 2.5em;
}

.header__description {
  margin: 10px 0 0 0;
  font-size: 1.2em;
}

.main-content {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 20px;
}

.about {
  background-color: #f9f9f9;
  padding: 20px;
  border-radius: 10px;
  border-left: 5px solid #4caf50;
  margin-bottom: 20px;
}

.about__title {
  color: #2c3e50;
  border-bottom: 2px solid #4caf50;
  padding-bottom: 10px;
}

.habits-examples h2 {
  color: #333;
  text-align: center;
  margin-bottom: 30px;
}

.habits-examples h2::after {
  content: '';
  display: block;
  width: 100px;
  background-color: #45a049;
  margin: 10px auto;
  height: 5px;
}

.habits-examples-line {
  display: block;
  width: 100px;
  height: 3px;
  background-color: #45a049;
  margin-left: 50%;
}


.habit-card {
  background: white;
  border: 2px solid #e0e0e0;
  border-radius: 8px;
  padding: 15px;
  margin-bottom: 15px;
  box-shadow: 0 2px 5px rgba(0,0,0,0.1);
  transition: all 0.3s ease;
}

.habit-card--completed {
  border: 2px solid #4caf50;;
}

.habit-card p {
  margin: 0;
  color: #666;
}

.habit-card h3 {
  margin: 0 0 10px 0;
  color: #4caf50;
}

.habit-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 5px 20px rgba(0,0,0,0.15);
  border-color: #4caf50;
}

.footer {
  background-color: #333;
  color: white;
  text-align: center;
  padding: 20px;
  margin-top: 40px;
}