body {
  font-family: 'Noto Sans KR', sans-serif;
  line-height: 1.8;
  margin: 0;
  padding: 0;
  background-color: #f7f9fc;
  color: #333;
}

.container {
  max-width: 900px;
  margin: 60px auto;
  background-color: white;
  padding: 50px;
  border-radius: 20px;
  box-shadow: 0 15px 35px rgba(0,0,0,0.1);
}

h1 {
  color: #6a1b9a;
  text-align: center;
  font-size: 3.5em;
  margin-bottom: 30px;
  text-shadow: 2px 2px 4px rgba(0,0,0,0.1);
}

h2 {
  color: #6a1b9a;
  border-bottom: 3px solid #6a1b9a;
  padding-bottom: 15px;
  margin-top: 50px;
  font-size: 2em;
}

.button {
  display: inline-block;
  background-color: #6a1b9a;
  color: white;
  padding: 15px 30px;
  text-decoration: none;
  border-radius: 50px;
  font-weight: bold;
  transition: all 0.3s ease;
  box-shadow: 0 5px 15px rgba(106,27,154,0.3);
}

.button:hover {
  background-color: #4a148c;
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(106,27,154,0.4);
}

ul, ol {
  padding-left: 25px;
}

li {
  margin-bottom: 15px;
}

.feature-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
  margin-top: 30px;
}

.feature-item {
  background-color: #f3e5f5;
  padding: 20px;
  border-radius: 15px;
  box-shadow: 0 5px 15px rgba(0,0,0,0.05);
  transition: all 0.3s ease;
}

.feature-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 20px rgba(0,0,0,0.1);
}

.center {
  text-align: center;
}

.footer {
  text-align: center;
  margin-top: 50px;
  font-size: 0.9em;
  color: #777;
}

.testimonial {
  background-color: #e1bee7;
  padding: 25px;
  border-radius: 15px;
  margin-top: 40px;
  font-style: italic;
  position: relative;
}

.testimonial::before {
  content: '"';
  font-size: 4em;
  color: #6a1b9a;
  position: absolute;
  top: -20px;
  left: 10px;
  opacity: 0.2;
}

@media (max-width: 768px) {
  .container {
    padding: 30px;
    margin: 20px;
  }
  
  h1 {
    font-size: 2.5em;
  }
  
  .feature-list {
    grid-template-columns: 1fr;
  }
}

.dark-mode-toggle {
  position: fixed;
  left: 20px;
  bottom: 20px;
  background: none;
  border: none;
  font-size: 24px;
  cursor: pointer;
  z-index: 1000;
}

body.dark-mode {
  background-color: #1a1a1a;
  color: #f0f0f0;
}

body.dark-mode .container {
  background-color: #2a2a2a;
}

body.dark-mode h1, body.dark-mode h2 {
  color: #bb86fc;
}

body.dark-mode .feature-item {
  background-color: #3a3a3a;
}

body.dark-mode .testimonial {
  background-color: #3a3a3a;
}

body.dark-mode .button {
  background-color: #bb86fc;
  color: #1a1a1a;
}

.reveal {
  opacity: 0;
  transform: translateY(50px);
  transition: all 1s ease;
}

.reveal.active {
  opacity: 1;
  transform: translateY(0);
  }
.tos-button {
  background-color: #808080;
  color: white;
  margin-top: 20px;
  display: inline-block;
  padding: 10px 20px;
  text-decoration: none;
  border-radius: 5px;
  transition: background-color 0.3s ease;
}

.tos-button:hover {
  background-color: #606060;
  }