* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
}

.header {
  background-color: white;
  padding: 1rem;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  text-align: center;
}

.header h1 {
  max-width: 1200px;
  margin: 0 auto;
  font-size: 1.5rem;
  font-weight: 500;
  color: #1976d2;
}

body {
  background-color: #f5f5f5;
  min-height: 100vh;
}

.page-content {
  padding: 1rem;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(280px, 300px) 1fr;
  gap: 1rem;
}

.settings-panel {
  background: white;
  padding: 1.5rem;
  border-radius: 8px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  height: fit-content;
}

.preview-panel {
  background: white;
  padding: 1.5rem;
  border-radius: 8px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.input-group {
  margin-bottom: 1rem;
}

label {
  display: block;
  margin-bottom: 0.5rem;
  color: #666;
  font-size: 0.9rem;
}

input {
  width: 100%;
  padding: 0.5rem;
  border: 1px solid #ddd;
  border-radius: 4px;
  font-size: 1rem;
  transition: border-color 0.2s;
}

input:focus {
  outline: none;
  border-color: #1976d2;
}

input[type='color'] {
  height: 40px;
  padding: 2px;
}

button {
  background-color: #1976d2;
  color: white;
  border: none;
  padding: 0.75rem 1.5rem;
  border-radius: 4px;
  cursor: pointer;
  font-size: 1rem;
  transition: background-color 0.2s;
  width: 100%;
}

button:hover {
  background-color: #1565c0;
}

#previewContainer {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 400px;
  background: #f8f8f8;
  border-radius: 4px;
  position: relative;
}

.canvas-wrapper {
  position: relative;
  width: 100%;
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
}

canvas {
  max-width: 100%;
  max-height: 70vh;
  object-fit: contain;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

@media (max-width: 768px) {
  .header h1 {
    font-size: 1.25rem;
  }

  .container {
    grid-template-columns: 1fr;
  }

  .settings-panel {
    padding: 1rem;
  }

  .preview-panel {
    padding: 1rem;
  }

  .input-group {
    margin-bottom: 0.75rem;
  }

  canvas {
    max-height: 50vh;
  }
}