* {
  margin: 0;
  padding: 0;
}

body {
  color: #fff;
  font-family: Arial, sans-serif;
  background-color: #262626;
  height: 100vh;
}

.container {
  max-width: 450px;
  height: 300px;
  margin: 0 auto;
}

.heading-title {
  text-align: center;
  margin: 20px 0;
  font-size: 1.8rem;
  border: 2px solid #fff;
  background: #262626;
  border-radius: 8px;
}

.main-content {
  text-align: center;
  background: #fff;
  color: #262626;
  height: 280px;
  padding: 20px;
  border-radius: 8px;
  box-shadow: 0 0 10px;
}

.quote-area {
  margin-bottom: 20px;
}

.quote-area .quote {
  font-size: 1.7rem;
  font-style: italic;
}

.author-info {
  font-size: 1.6rem;
  color: #ff0000;
  margin-bottom: 45px;
}

.button-area .button {
  margin: 10px;
  padding: 10px 20px;
  border-radius: 5px;
  border: none;
  background: #262626;
  color: #fff;
  cursor: pointer;
}

.button-area .button:active {
  background: #add8e6;
}

.dark-mode {
  background: #262626;
}

.dark-mode.main-content,
.dark-mode.quote-area .quote,
.dark-mode.author-info {
  color: #fff;
}

.dark-mode .button {
  background: #fff;
  color: #262626;
}

@media (max-width: 978px) {
  body {
    padding: 0 30px;
  }
  .container {
    width: 100%;
  }

  .heading-title {
    font-size: 1.4rem;
  }

  .main-content {
    height: 400px;
  }
}