:root {
  --primary-color: #4a6cf7;
  --primary-hover: #3a5ce5;
  --secondary-color: #f5f5f5;
  --text-color: #333;
  --border-color: #ddd;
  --error-color: #e74c3c;
  --success-color: #2ecc71;
  --border-radius: 8px;
  --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.6;
  color: var(--text-color);
  background-color: #f9f9f9;
  padding: 20px;
}

.container {
  max-width: 900px;
  margin: 0 auto;
  background-color: white;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  padding: 30px;
}

h1 {
  text-align: center;
  margin-bottom: 30px;
  color: var(--primary-color);
}

.upload-container {
  border: 2px dashed var(--border-color);
  border-radius: var(--border-radius);
  padding: 40px;
  text-align: center;
  margin-bottom: 30px;
  transition: all 0.3s ease;
}

.upload-container.drag-over {
  border-color: var(--primary-color);
  background-color: rgba(74, 108, 247, 0.05);
}

.upload-label {
  display: block;
  cursor: pointer;
}

.upload-icon {
  font-size: 48px;
  color: var(--primary-color);
  margin-bottom: 10px;
}

.preview-container {
  margin-bottom: 30px;
}

.preview-wrapper {
  display: flex;
  justify-content: center;
  margin-bottom: 20px;
  max-height: 400px;
  overflow: hidden;
  border-radius: var(--border-radius);
  border: 1px solid var(--border-color);
}

#preview-image {
  max-width: 100%;
  max-height: 400px;
  object-fit: contain;
}

.controls {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
  margin-bottom: 20px;
}

.control-group {
  margin-bottom: 15px;
}

label {
  display: block;
  margin-bottom: 5px;
  font-weight: 500;
}

input[type="number"],
select {
  width: 100%;
  padding: 10px;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  font-size: 16px;
}

input[type="range"] {
  width: 100%;
  margin-right: 10px;
}

.checkbox-label {
  display: flex;
  align-items: center;
  cursor: pointer;
}

.checkbox-label input {
  margin-right: 10px;
}

.buttons {
  display: flex;
  gap: 10px;
  justify-content: center;
  margin-bottom: 15px;
}

.btn {
  padding: 12px 24px;
  border: none;
  border-radius: var(--border-radius);
  font-size: 16px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s ease;
}

.btn.primary {
  background-color: var(--primary-color);
  color: white;
}

.btn.primary:hover {
  background-color: var(--primary-hover);
}

.btn.secondary {
  background-color: var(--secondary-color);
  color: var(--text-color);
}

.btn.secondary:hover {
  background-color: #e5e5e5;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.format-info {
  margin-top: 10px;
  padding: 10px;
  background-color: #fff8e1;
  border-radius: var(--border-radius);
  font-size: 14px;
}

.info-container {
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid var(--border-color);
}

.info-container h2 {
  margin-bottom: 15px;
  font-size: 20px;
}

.info-container ul {
  margin-left: 20px;
  margin-bottom: 15px;
}

@media (max-width: 768px) {
  .container {
    padding: 20px;
  }
  
  .controls {
    grid-template-columns: 1fr;
  }
  
  .buttons {
    flex-direction: column;
  }
  
  .btn {
    width: 100%;
  }
}