* {
  box-sizing: border-box;
}

body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  margin: 0;
  padding: 0;
  background: linear-gradient(to right, #00b4db, #0083b0);
  color: #333;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
}

.container {
  background: #fff;
  padding: 25px 30px;
  border-radius: 10px;
  max-width: 600px;
  width: 90%;
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.2);
}

h1 {
  text-align: center;
  color: #0083b0;
  margin-bottom: 20px;
}

textarea {
  width: 100%;
  height: 100px;
  padding: 12px;
  font-size: 16px;
  resize: vertical;
  border-radius: 8px;
  border: 1px solid #ccc;
  margin-bottom: 20px;
}

.controls {
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.control label {
  display: block;
  margin-bottom: 5px;
  font-weight: bold;
}

select,
input[type="range"] {
  width: 100%;
  padding: 8px;
  border-radius: 6px;
  border: 1px solid #ccc;
}

button {
  padding: 12px;
  background-color: #00b4db;
  color: #fff;
  font-size: 16px;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.3s ease;
}

button:hover {
  background-color: #0083b0;
}

footer {
  margin-top: 20px;
  text-align: center;
  font-size: 13px;
  color: #666;
}

@media screen and (max-width: 500px) {
  textarea {
    height: 80px;
  }

  h1 {
    font-size: 20px;
  }
}