.upload-empty-card {
  box-sizing: border-box;
  width: min(520px, calc(100% - 32px)) !important;
  max-width: 520px !important;
  padding: clamp(24px, 5vw, 44px) !important;
  margin: 24px auto;
  border: 2px dashed #a5b4d5 !important;
  border-radius: 22px !important;
  background: linear-gradient(155deg, #fff, #f0f5ff) !important;
  box-shadow: 0 14px 40px rgba(30, 58, 100, .10) !important;
  text-align: center;
  color: #243653;
  cursor: pointer;
  transition: border-color .18s, box-shadow .18s;
}
.upload-empty-card::before {
  content: "↑";
  display: block;
  width: 64px;
  height: 64px;
  margin: 0 auto 20px;
  border-radius: 18px;
  background: #e2ebff;
  color: #2563eb;
  font: 600 40px/64px system-ui, sans-serif;
}
.upload-empty-card > div:first-child { display: none !important; }
.upload-empty-card h2, .upload-empty-card h4 {
  color: #172d4d !important;
  font: 800 clamp(18px, 3vw, 23px)/1.35 system-ui, sans-serif !important;
  margin: 0 0 10px !important;
}
.upload-empty-card p { color: #62738d !important; font-size: 14px !important; line-height: 1.7 !important; }
label.upload-empty-card::after {
  content: "Choose file →";
  display: inline-block;
  background: #2563eb;
  color: white;
  border-radius: 10px;
  padding: 12px 26px;
  margin-top: 22px;
  font: 700 14px/1.4 system-ui, sans-serif;
}
.upload-empty-card:hover, .upload-empty-card.dragover, .upload-empty-card:focus-visible {
  border-color: #2563eb !important;
  box-shadow: 0 14px 40px rgba(37, 99, 235, .18) !important;
  outline: 3px solid #bfdbfe;
  outline-offset: 4px;
}