body {
  background: linear-gradient(135deg, #fff 0%, #fff 100%);
  min-height: 100vh;
  margin: 0;
  font-family: 'Segoe UI', 'Roboto', Arial, sans-serif;
}

.header {
  background: #fff;
  color: #ffd700;
  padding: 2rem 0 1rem 0;
  text-align: center;
  letter-spacing: 2px;
}

.header .subtitle {
  color: #fff;
  font-size: 1.2rem;
  margin-top: 0.5rem;
  font-weight: 400;
}

.upload-card {
  background: #fff;
  border-radius: 18px;
  box-shadow: 0 4px 24px rgba(10, 23, 78, 0.12);
  border: 2px solid #ffd700;
  max-width: 420px;
  margin: 2rem auto;
  padding: 2.5rem 2rem;
  text-align: center;
}

.upload-card input[type="file"] {
  display: none;
}

.upload-card .MuiButton-contained {
  background: #ffd700;
  color: #0a174e;
  font-weight: bold;
  margin-bottom: 1rem;
}

.upload-card .MuiButton-containedPrimary {
  background: #0a174e;
  color: #ffd700;
  font-weight: bold;
}

.upload-card img {
  margin-top: 1rem;
  max-width: 100%;
  border-radius: 10px;
  border: 2px solid #0a174e;
}

.footer {
  background: #0a174e;
  color: #ffd700;
  text-align: center;
  padding: 1rem 0;
  position: fixed;
  width: 100%;
  bottom: 0;
  letter-spacing: 1px;
  font-size: 1rem;
}