body {
  margin: 0;
  font-family: 'Segoe UI', sans-serif;
  background: radial-gradient(ellipse at center, #0a0f1c, #0a0f1c 80%, #060a13 100%);
  color: white;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

.app-container {
  display: flex;
  gap: 2vw;
  align-items: flex-start;
  flex-wrap: wrap;
}

.card {
  background: rgba(255, 255, 255, 0.04);
  backdrop-filter: blur(20px);
  border-radius: 18px;
  padding: 20px;
  width: 280px;
  box-shadow: 0 8px 30px rgba(0,0,0,0.2);
  display: flex;
  flex-direction: column;
  align-items: center;
  transition: opacity 0.3s ease;
}

.header-row {
  width: 100%;
  display: flex;
  justify-content: space-between;
  font-size: 14px;
  color: #aaa;
  margin-bottom: 10px;
}

h1 {
  font-size: 20px;
  margin: 10px 0 20px;
  font-weight: 500;
}

.upload-btn {
  padding: 16px 24px;
  border-radius: 14px;
  background: linear-gradient(145deg, #1f2b3d, #0e121c);
  border: 1px solid #1c2431;
  color: #d1dfff;
  cursor: pointer;
  font-size: 16px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.upload-btn span {
  font-size: 20px;
  line-height: 0;
}

#processingText {
  margin-top: 20px;
  color: #ccc;
  font-size: 14px;
}

canvas {
  image-rendering: pixelated;
  max-width: 100%;
  border-radius: 12px;
  background: #0c1628;
  margin-bottom: 20px;
}

.controls {
  display: flex;
  flex-direction: column;
  gap: 10px;
  width: 100%;
}

.input-group {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.input-group label {
  font-size: 14px;
  color: #aaa;
  display: flex;
  gap: 5px;
  align-items: center;
}

.input-group input {
  background: #121e2e;
  border: 1px solid #263143;
  color: white;
  border-radius: 8px;
  padding: 4px 8px;
  width: 80px;
}

button {
  margin-top: 20px;
  padding: 12px;
  width: 100%;
  background: linear-gradient(135deg, #2c4b7d, #1d2c48);
  border: none;
  color: white;
  font-weight: bold;
  border-radius: 14px;
  cursor: pointer;
  font-size: 16px;
}

.download-preview {
  width: 128px;
  height: 128px;
  background: #111c2e;
  border-radius: 12px;
  image-rendering: pixelated;
  background-position: center;
  background-repeat: no-repeat;
  background-size: contain;
  margin-bottom: 20px;
}

.info-icon {
  font-style: italic;
  font-size: 12px;
  background: #2f394f;
  color: #dbe4ff;
  padding: 2px 6px;
  border-radius: 8px;
  cursor: help;
}

.hidden {
  display: none !important;
}