/* Card */
.card {
  background: rgba(30, 41, 59, 0.8);
  border: 1px solid rgba(71, 85, 105, 0.5);
  border-radius: 1rem;
  padding: 2rem;
  backdrop-filter: blur(8px);
}

/* PIN digits */
.pin-digit {
  width: 3.5rem;
  height: 4rem;
  text-align: center;
  font-size: 1.5rem;
  font-weight: 700;
  background: rgba(15, 23, 42, 0.6);
  border: 2px solid rgba(71, 85, 105, 0.5);
  border-radius: 0.75rem;
  color: white;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.pin-digit:focus {
  border-color: #f97316;
  box-shadow: 0 0 0 3px rgba(249, 115, 22, 0.2);
}

.pin-digit.filled {
  border-color: #f97316;
}

/* Input fields */
.input-field {
  width: 100%;
  padding: 0.75rem 1rem;
  background: rgba(15, 23, 42, 0.6);
  border: 2px solid rgba(71, 85, 105, 0.5);
  border-radius: 0.75rem;
  color: white;
  font-size: 0.95rem;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.input-field:focus {
  border-color: #f97316;
  box-shadow: 0 0 0 3px rgba(249, 115, 22, 0.2);
}

.input-field::placeholder {
  color: rgba(148, 163, 184, 0.5);
}

/* Buttons */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  background: #f97316;
  color: white;
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: 0.75rem;
  border: none;
  cursor: pointer;
  transition: background 0.2s, opacity 0.2s, transform 0.1s;
}

.btn-primary:hover:not(:disabled) {
  background: #ea580c;
}

.btn-primary:active:not(:disabled) {
  transform: scale(0.98);
}

.btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem 1rem;
  background: rgba(71, 85, 105, 0.5);
  color: #cbd5e1;
  font-weight: 500;
  font-size: 0.875rem;
  border-radius: 0.5rem;
  border: 1px solid rgba(71, 85, 105, 0.5);
  cursor: pointer;
  transition: background 0.2s;
}

.btn-secondary:hover {
  background: rgba(71, 85, 105, 0.8);
}

/* Drop Zone */
.drop-zone {
  border: 2px dashed rgba(71, 85, 105, 0.5);
  border-radius: 1rem;
  padding: 2rem;
  text-align: center;
  transition: border-color 0.2s, background 0.2s;
  cursor: pointer;
}

.drop-zone.drag-over {
  border-color: #f97316;
  background: rgba(249, 115, 22, 0.05);
}

.drop-zone.has-files {
  border-style: solid;
  border-color: rgba(71, 85, 105, 0.3);
  padding: 1rem;
}

/* Progress bars */
.progress-bar-bg {
  width: 100%;
  height: 0.5rem;
  background: rgba(15, 23, 42, 0.6);
  border-radius: 9999px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, #f97316, #fb923c);
  border-radius: 9999px;
  transition: width 0.3s ease;
}

.progress-bar-fill.complete {
  background: linear-gradient(90deg, #22c55e, #4ade80);
}

/* File item */
.file-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.5rem 0.75rem;
  background: rgba(15, 23, 42, 0.4);
  border-radius: 0.5rem;
  font-size: 0.8125rem;
}

.file-item .file-name {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: #cbd5e1;
}

.file-item .file-size {
  color: #64748b;
  white-space: nowrap;
  font-size: 0.75rem;
}

.file-item .file-status {
  width: 1.25rem;
  height: 1.25rem;
  flex-shrink: 0;
}

.file-item .file-progress {
  width: 4rem;
  flex-shrink: 0;
}

/* Loading spinner */
.spinner {
  display: inline-block;
  width: 1.25rem;
  height: 1.25rem;
  border: 2px solid rgba(249, 115, 22, 0.3);
  border-top-color: #f97316;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Remove button on file items */
.file-remove {
  color: #64748b;
  cursor: pointer;
  padding: 0.125rem;
  border-radius: 0.25rem;
  transition: color 0.2s;
  background: none;
  border: none;
  font-size: 1rem;
  line-height: 1;
}

.file-remove:hover {
  color: #ef4444;
}

/* Scrollbar */
#file-list::-webkit-scrollbar {
  width: 6px;
}

#file-list::-webkit-scrollbar-track {
  background: transparent;
}

#file-list::-webkit-scrollbar-thumb {
  background: rgba(71, 85, 105, 0.5);
  border-radius: 3px;
}