*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: system-ui, -apple-system, sans-serif;
  background: #0f0f13;
  color: #e0e0e0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2rem;
}

h1 {
  font-size: 1.6rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
  color: #fff;
}

.subtitle {
  color: #666;
  font-size: 0.85rem;
  margin-bottom: 2rem;
}

.card {
  background: #1a1a22;
  border: 1px solid #2a2a36;
  border-radius: 12px;
  padding: 2rem;
  width: 100%;
  max-width: 640px;
}

/* Drop zone */
.dropzone {
  border: 2px dashed #333;
  border-radius: 8px;
  padding: 2.5rem 1.5rem;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
  position: relative;
}

.dropzone:hover,
.dropzone.drag-over {
  border-color: #6c63ff;
  background: rgba(108, 99, 255, 0.06);
}

.dropzone input[type="file"] {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
  width: 100%;
  height: 100%;
}

.dropzone-icon {
  font-size: 2rem;
  margin-bottom: 0.75rem;
  display: block;
  color: #444;
}

.dropzone-label {
  color: #aaa;
  font-size: 0.9rem;
}

.dropzone-label span {
  color: #6c63ff;
  font-weight: 500;
}

.dropzone-hint {
  font-size: 0.75rem;
  color: #555;
  margin-top: 0.4rem;
}

/* File list */
#file-list {
  margin-top: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.file-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.6rem 0.85rem;
  background: #12121a;
  border: 1px solid #2a2a36;
  border-radius: 6px;
  font-size: 0.85rem;
}

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

.file-item .status {
  font-size: 0.75rem;
  padding: 0.2rem 0.55rem;
  border-radius: 4px;
  font-weight: 500;
}

.status-pending { background: #2a2a1a; color: #888; }
.status-ok      { background: #0f2a1a; color: #4caf7d; }
.status-error   { background: #2a0f0f; color: #e05555; }

.file-item .download-btn {
  background: #6c63ff;
  color: #fff;
  border: none;
  padding: 0.25rem 0.65rem;
  border-radius: 5px;
  cursor: pointer;
  font-size: 0.78rem;
  font-weight: 500;
  transition: background 0.15s;
  white-space: nowrap;
}

.file-item .download-btn:hover    { background: #5a52e0; }
.file-item .download-btn:disabled { background: #333; color: #666; cursor: default; }

.file-item .preview-btn {
  background: #2a2a44;
}

.file-item .preview-btn:not(:disabled):hover { background: #383860; }

/* Buttons row */
.actions {
  display: flex;
  gap: 0.75rem;
  margin-top: 1.25rem;
}

.btn {
  flex: 1;
  padding: 0.65rem 1rem;
  border-radius: 7px;
  border: none;
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s, opacity 0.15s;
}

.btn:disabled { opacity: 0.4; cursor: default; }

.btn-primary { background: #6c63ff; color: #fff; }
.btn-primary:not(:disabled):hover { background: #5a52e0; }

.btn-secondary { background: #2a2a36; color: #ccc; }
.btn-secondary:not(:disabled):hover { background: #333344; }

/* Preview */
#preview-section {
  margin-top: 1.5rem;
  display: none;
}

#preview-section h2 {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #555;
  margin-bottom: 0.5rem;
}

#preview-output {
  background: #0c0c12;
  border: 1px solid #222;
  border-radius: 6px;
  padding: 0.85rem 1rem;
  font-family: "SF Mono", "Fira Code", monospace;
  font-size: 0.78rem;
  line-height: 1.6;
  color: #8af;
  max-height: 240px;
  overflow-y: auto;
  white-space: pre;
}

/* Empty state */
#empty-state {
  text-align: center;
  color: #444;
  font-size: 0.82rem;
  padding: 0.5rem 0;
}