body {
  margin: 0;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background: 
    linear-gradient(to right, 
      #ffffff 0%, 
      #ffffff 80%, 
      #e63946 80%, 
      #e63946 100%);
  color: #333;
  overflow-x: hidden;
}

header {
  background-color: #ffffff;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  padding: 20px 40px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

header nav a {
  text-decoration: none;
  color: #e63946;
  font-size: 14px;
  margin-right: 20px;
  transition: color 0.3s ease;
}

header nav a:hover {
  color: #a0262f;
}

.brand {
  font-size: 16px;
  color: #e63946;
  font-weight: bold;
}

.container {
  background: white;
  border-radius: 12px;
  box-shadow: 0 4px 18px rgba(0, 0, 0, 0.1);
  padding: 40px;
  width: 380px;
  text-align: center;
  margin: 80px auto;
  border-top: 5px solid #e63946;
}

h1, h2 {
  color: #b22222;
}

.description {
  color: #666;
  margin-bottom: 25px;
}

input[type="text"] {
  width: 80%;
  padding: 10px;
  border: 1px solid #ccc;
  border-radius: 4px;
  margin-top: 10px;
  font-size: 16px;
}

button, .download-btn {
  margin-top: 15px;
  padding: 12px 25px;
  background-color: #e63946;
  color: white;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-size: 16px;
  transition: background-color 0.3s ease;
  font-weight: bold;
}

button:hover, .download-btn:hover {
  background-color: #a0262f;
}

.error {
  color: #c0392b;
  margin-top: 10px;
}

.features {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
  margin-top: 40px;
}

.feature {
  width: 100px;
  text-align: center;
  padding: 10px;
}

.feature-icon {
  background-color: #fceaea;
  border-radius: 50%;
  padding: 10px;
  width: 50px;
  height: 50px;
  margin: 0 auto 10px;
  display: flex;
  justify-content: center;
  align-items: center;
  fill: #e63946;
}

.feature-title {
  font-weight: bold;
  color: #b22222;
  margin-bottom: 4px;
}

.subtitle {
  font-size: 14px;
  color: #555;
}

.captcha-box {
  font-size: 28px;
  font-weight: bold;
  background: #e63946;
  color: white;
  width: 100px;
  margin: 15px auto;
  padding: 10px 0;
  border-radius: 6px;
  letter-spacing: 4px;
  user-select: none;
}

footer {
  text-align: center;
  margin-top: 40px;
  font-size: 12px;
  color: #777;
}