* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
  background: #f4f6f8;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
}

.container {
  background: #ffffff;
  padding: 30px 40px;
  border-radius: 16px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
  text-align: center;
  width: 100%;
  max-width: 500px;
}

h1 {
  font-size: 28px;
  margin-bottom: 20px;
  color: #333333;
}

input[type="file"] {
  padding: 12px;
  border: 2px dashed #ccc;
  border-radius: 10px;
  background-color: #fafafa;
  cursor: pointer;
  width: 100%;
  margin-bottom: 20px;
}

button {
  padding: 12px 24px;
  background-color: #ff4d4f;
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 16px;
  cursor: pointer;
  transition: background 0.3s ease;
}

button:hover {
  background-color: #e63946;
}

@media screen and (max-width: 600px) {
  .container {
    padding: 20px;
  }

  h1 {
    font-size: 22px;
  }
}