* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background-color: #0b0d21;
  color: #f4f4f4;
  display: flex;
  justify-content: center;
  min-height: 100vh;
  width: 100vw;
}

.container {
  max-width: 720px;
  width: 100%;
  padding: 40px 24px 80px;
  margin: 0 auto;
}

h1 {
  font-size: 32px;
  margin-bottom: 16px;
  text-align: center;
  font-weight: bold;
}

h1 .highlight {
  color: #3ef2c4;
}

p {
  font-size: 16px;
  line-height: 1.6;
  margin: 10px 0;
  text-align: center;
}

h2 {
  margin-top: 40px;
  font-size: 24px;
  text-align: center;
  color: #aeeaff;
}

ul {
  list-style: none;
  padding: 0;
  margin-top: 24px;
}

li {
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 15px;
}

blockquote {
  font-style: italic;
  margin-top: 20px;
  color: #ccc;
  border-left: 3px solid #3ef2c4;
  padding-left: 10px;
}

form {
  margin-top: 40px;
}

input,
select {
  width: 100%;
  padding: 14px;
  margin-top: 12px;
  border: none;
  border-radius: 10px;
  font-size: 14px;
  background-color: #1b1f3a;
  color: white;
}

input::placeholder {
  color: #999;
}

select {
  color: #aaa;
}

button {
  width: 100%;
  padding: 14px;
  margin-top: 20px;
  border: none;
  border-radius: 10px;
  background: linear-gradient(90deg, #3f51ff, #00e3ff);
  color: #fff;
  font-weight: bold;
  font-size: 15px;
  transition: opacity 0.3s ease;
  cursor: pointer;
  box-shadow: 0 0 10px rgba(0, 255, 255, 0.2);
}

button:hover {
  opacity: 0.9;
}

@media (max-width: 600px) {
  h1 {
    font-size: 24px;
  }

  h2 {
    font-size: 20px;
  }

  input,
  select,
  button {
    font-size: 13px;
  }
}