:root {
  color-scheme: light;
  --bg: #f4f6f8;
  --panel: #ffffff;
  --panel-2: #eef2f6;
  --text: #13202f;
  --muted: #5d6b7a;
  --border: #d5dde6;
  --accent: #1764d6;
  --accent-2: #0f8b5f;
  --danger: #b42318;
  --shadow: 0 10px 28px rgba(20, 38, 58, 0.08);
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  font-family: Inter, "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  color: var(--text);
  background: linear-gradient(180deg, #f7f9fb 0%, var(--bg) 100%);
}

button,
input,
select,
textarea {
  font: inherit;
}

button {
  cursor: pointer;
}

.app-shell {
  width: min(1440px, calc(100vw - 32px));
  margin: 0 auto;
  padding: 20px 0 28px;
}

.topbar {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}

.topbar h1 {
  margin: 0;
  font-size: 24px;
  line-height: 1.2;
  letter-spacing: 0;
}

.topbar p {
  margin: 6px 0 0;
  color: var(--muted);
}

.status-pill {
  display: inline-flex;
  align-items: center;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: #fff;
  color: var(--muted);
  box-shadow: var(--shadow);
}

.workspace {
  display: grid;
  grid-template-columns: minmax(320px, 420px) minmax(0, 1fr);
  gap: 16px;
  align-items: start;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  min-width: 0;
}

.input-panel {
  padding: 16px;
  display: grid;
  gap: 14px;
}

.drop-zone {
  position: relative;
  display: grid;
  place-items: center;
  gap: 8px;
  padding: 20px 16px;
  min-height: 110px;
  border: 1.5px dashed #9cb3c9;
  border-radius: var(--radius);
  background: var(--panel-2);
  text-align: center;
}

.drop-zone.dragover {
  border-color: var(--accent);
  background: #eaf2ff;
}

.drop-zone input {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}

.drop-title {
  font-weight: 700;
  color: var(--text);
}

.drop-meta {
  color: var(--muted);
  font-size: 13px;
}

.preview-shell,
.enhanced-shell {
  position: relative;
  aspect-ratio: 4 / 3;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  background: #f8fafc;
}

.preview-shell img,
.enhanced-shell img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: none;
  background: #fff;
}

.empty-preview {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  color: var(--muted);
  background:
    linear-gradient(135deg, rgba(23, 100, 214, 0.05), rgba(15, 139, 95, 0.05)),
    #f8fafc;
}

.settings-grid {
  display: grid;
  gap: 10px;
}

.switch-row,
.field-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: #fff;
}

.switch-row strong,
.field-row span {
  display: block;
  line-height: 1.2;
}

.switch-row small {
  display: block;
  margin-top: 3px;
  color: var(--muted);
  font-size: 12px;
}

.field-row select {
  min-width: 168px;
  max-width: 220px;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: #fff;
  color: var(--text);
}

.primary-button,
.secondary-button,
.tab-button {
  border: 1px solid transparent;
  border-radius: 6px;
  padding: 10px 14px;
  transition: background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease, opacity 0.15s ease;
}

.primary-button {
  background: var(--accent);
  color: #fff;
  font-weight: 600;
}

.primary-button:disabled,
.secondary-button:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.secondary-button {
  background: #fff;
  color: var(--text);
  border-color: var(--border);
}

.secondary-button:hover,
.tab-button:hover {
  border-color: #afbdd0;
}

.primary-button:hover {
  background: #155ac2;
}

.error-text {
  min-height: 1.2em;
  margin: 0;
  color: var(--danger);
}

.result-panel {
  padding: 16px;
  display: grid;
  gap: 14px;
}

.result-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
}

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

.result-header p {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: flex-end;
}

.tabs {
  display: flex;
  gap: 8px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 8px;
}

.tab-button {
  background: #fff;
  color: var(--muted);
  border-color: var(--border);
}

.tab-button.active {
  color: var(--text);
  border-color: var(--accent);
  box-shadow: inset 0 -2px 0 var(--accent);
}

.tab-panel {
  display: none;
  min-height: 420px;
}

.tab-panel.active {
  display: block;
}

#textOutput {
  width: 100%;
  min-height: 420px;
  resize: vertical;
  padding: 14px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text);
  line-height: 1.6;
}

#jsonOutput {
  margin: 0;
  min-height: 420px;
  overflow: auto;
  padding: 14px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: #0f1720;
  color: #d9e6f2;
  line-height: 1.5;
}

.tables-output {
  min-height: 420px;
  padding: 8px 0;
}

.table-block {
  margin-bottom: 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: #fff;
}

.table-block-header {
  padding: 10px 12px;
  background: #f7fafc;
  border-bottom: 1px solid var(--border);
  color: var(--muted);
  font-size: 13px;
}

.table-scroll {
  overflow: auto;
}

.table-block table {
  width: 100%;
  border-collapse: collapse;
}

.table-block th,
.table-block td {
  border: 1px solid #dce4ec;
  padding: 8px 10px;
  text-align: left;
  vertical-align: top;
  white-space: pre-wrap;
  word-break: break-word;
}

.table-block th {
  background: #f2f6fa;
  font-weight: 600;
}

@media (max-width: 1100px) {
  .workspace {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .app-shell {
    width: min(100vw - 20px, 100%);
    padding-top: 12px;
  }

  .topbar,
  .result-header {
    flex-direction: column;
    align-items: stretch;
  }

  .button-row {
    justify-content: flex-start;
  }

  .field-row {
    flex-direction: column;
    align-items: stretch;
  }

  .field-row select {
    width: 100%;
    max-width: none;
  }
}