* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #f5f5f7;
  color: #1d1d1f;
}

.app {
  max-width: 820px;
  margin: 0 auto;
  padding: 32px 24px 48px;
}

header h1 {
  margin: 0 0 4px;
  font-size: 28px;
}

.subtitle {
  margin: 0 0 24px;
  color: #6e6e73;
}

.dropzone {
  border: 2px dashed #c7c7cc;
  border-radius: 12px;
  padding: 36px 20px;
  text-align: center;
  background: #fff;
  transition: border-color 0.15s, background 0.15s;
}

.dropzone.dragover {
  border-color: #0071e3;
  background: #eef6ff;
}

.dropzone p {
  margin: 6px 0;
  color: #6e6e73;
}

.file-name {
  font-weight: 600;
  color: #1d1d1f !important;
}

button {
  background: #f0f0f2;
  border: 1px solid #d2d2d7;
  border-radius: 8px;
  padding: 8px 16px;
  font-size: 14px;
  cursor: pointer;
  color: #1d1d1f;
}

button:hover {
  background: #e8e8ed;
}

button.primary {
  background: #0071e3;
  border-color: #0071e3;
  color: #fff;
}

button.primary:hover {
  background: #0077ed;
}

.paste-section {
  margin-top: 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.paste-section label {
  font-size: 13px;
  color: #6e6e73;
}

.paste-section textarea {
  width: 100%;
  min-height: 90px;
  resize: vertical;
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid #d2d2d7;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 13px;
  color: #1d1d1f;
}

.options {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  align-items: center;
  margin: 20px 0;
  font-size: 14px;
}

.options label {
  display: flex;
  align-items: center;
  gap: 6px;
}

select {
  padding: 4px 6px;
  border-radius: 6px;
  border: 1px solid #d2d2d7;
}

.preview {
  margin-top: 24px;
  background: #fff;
  border: 1px solid #d2d2d7;
  border-radius: 12px;
  padding: 16px 20px;
}

.preview-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.preview-header h2 {
  margin: 0;
  font-size: 18px;
}

.actions {
  display: flex;
  gap: 10px;
}

#jsonOutput {
  margin-top: 14px;
  max-height: 380px;
  overflow: auto;
  background: #1d1d1f;
  color: #f5f5f7;
  padding: 14px;
  border-radius: 8px;
  font-size: 13px;
  line-height: 1.5;
}

.status {
  margin-top: 16px;
  font-size: 13px;
  color: #6e6e73;
  min-height: 18px;
}

.status.error {
  color: #d70015;
}

.status.success {
  color: #1a7f37;
}