* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #f5f7fb;
  padding: 20px;
}

.container {
  max-width: 700px;
  margin: 0 auto;
}

h1 {
  text-align: center;
  margin-bottom: 8px;
}

.subtitle {
  text-align: center;
  color: #666;
  margin-bottom: 20px;
}

#drop-area {
  border: 2px dashed #999;
  background: #fff;
  border-radius: 16px;
  padding: 40px 20px;
  text-align: center;
  transition: 0.2s;
}

#drop-area.dragover {
  border-color: #111;
  transform: scale(1.01);
}

button {
  border: none;
  padding: 12px 18px;
  border-radius: 10px;
  cursor: pointer;
  font-size: 15px;
  background: #111;
  color: white;
}

#result {
  margin-top: 20px;
  background: white;
  border-radius: 16px;
  padding: 20px;
}

.format-info {
  font-weight: bold;
  margin-bottom: 12px;
  font-size: 18px;
}

pre {
  background: #111;
  color: #00ff88;
  padding: 15px;
  border-radius: 10px;
  white-space: pre-wrap;
  word-break: break-word;
  max-height: 400px;
  overflow: auto;
}

.actions {
  margin-top: 15px;
  display: flex;
  justify-content: center;
}

.hidden {
  display: none;
}

@media (max-width: 600px) {
  body {
    padding: 12px;
  }

  h1 {
    font-size: 24px;
  }

  #drop-area {
    padding: 30px 15px;
  }

  button {
    width: 100%;
  }

  .actions {
    display: block;
  }
}