:root {
  --primary: #6C5DD3;
  --primary-dark: #4B3F72;
  --light: #F9F9FC;
  --dark: #222;
  --gray: #999;
  --white: #ffffff;
  --accent: #A786DF;
}

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

body {
  font-family: 'Poppins', sans-serif;
  background-color: var(--light);
  color: var(--dark);
  line-height: 1.7;
  font-size: 18px;
  -webkit-user-select: none;
  -ms-user-select: none;
  user-select: none;
  overscroll-behavior: none;
}

.container {
  max-width: 1140px;
  margin: auto;
  padding: 2rem;
}

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

.hero {
  background: linear-gradient(to right, var(--primary-dark), var(--primary));
  color: var(--white);
  padding: 5rem 2rem;
  text-align: center;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.hero-subtitle {
  font-size: 1.5rem;
  margin-bottom: 2rem;
  color: #ddd;
}

.btn {
  padding: 1rem 2rem;
  border-radius: 8px;
  font-weight: 600;
  text-decoration: none;
  display: inline-block;
  transition: background 0.3s ease;
  font-size: 1rem;
}

.btn-primary {
  background-color: var(--accent);
  color: var(--white);
}

.btn-primary:hover {
  background-color: var(--white);
  color: var(--primary-dark);
}

.btn-secondary {
  background-color: var(--white);
  color: var(--primary);
  border: 2px solid var(--primary);
}

.btn-secondary:hover {
  background-color: var(--accent);
  color: var(--white);
  border-color: var(--accent);
}

.section {
  padding: 4rem 0;
}

.section-title {
  font-size: 2.25rem;
  margin-bottom: 1rem;
  color: var(--primary-dark);
}

.section-description {
  max-width: 700px;
  margin: auto;
  color: var(--gray);
  font-size: 1.1rem;
}

.dropdown {
  background-color: var(--white);
  border: 1px solid #ddd;
  margin: 1rem auto;
  border-radius: 8px;
  overflow: hidden;
  max-width: 800px;
}

.dropdown-button {
  background-color: var(--white);
  color: var(--primary-dark);
  padding: 1.2rem 2rem;
  text-align: left;
  width: 100%;
  font-weight: 600;
  cursor: pointer;
  border: none;
  outline: none;
  font-size: 1.1rem;
  transition: background 0.3s ease;
}

.dropdown-button:hover {
  background-color: #f2f2f2;
}

.dropdown-content {
  display: none;
  padding: 1rem 2rem;
  background-color: var(--light);
  color: var(--dark);
  font-size: 1rem;
}

.grid {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  justify-content: center;
  margin-top: 3rem;
}

.feature-card {
  background-color: var(--white);
  padding: 2rem;
  border-radius: 12px;
  box-shadow: 0 10px 20px rgba(108, 93, 211, 0.08);
  width: 300px;
  transition: transform 0.2s ease;
}

.feature-card:hover {
  transform: translateY(-6px);
}

.cta {
  background-color: var(--primary-dark);
  color: var(--white);
  padding: 4rem 2rem;
}

footer {
  background-color: #111;
  color: #bbb;
  padding: 1.5rem 0;
  font-size: 1rem;
}

.notice {
  background-color: #fff3cd;
  color: #856404;
  border: 1px solid #ffeeba;
  padding: 1rem 2rem;
  text-align: center;
  font-size: 1rem;
  margin: 2rem auto;
  max-width: 800px;
  border-radius: 8px;
}

@media (max-width: 768px) {
  .hero-title {
    font-size: 2.5rem;
  }

  .hero-subtitle {
    font-size: 1.2rem;
  }

  .feature-card {
    width: 100%;
  }

  .container {
    padding: 1rem;
  }
}