:root {
  color-scheme: light;
  --bg: #eef3f8;
  --panel: #ffffff;
  --text: #162033;
  --muted: #607089;
  --line: #d8e0ec;
  --accent: #1f6feb;
  --accent-dark: #174ea6;
  --success: #168557;
  --error: #c43c39;
  --terminal: #111827;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.shell {
  width: min(1380px, calc(100vw - 40px));
  margin: 24px auto;
}

.topbar,
.panel-heading,
.preview-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
}

.topbar {
  align-items: center;
  margin-bottom: 18px;
}

.eyebrow,
.preview-kicker,
.summary-label {
  font-size: 12px;
  font-weight: 850;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.eyebrow,
.preview-kicker {
  color: var(--accent-dark);
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 0;
  font-size: 30px;
}

h2 {
  margin-bottom: 10px;
  font-size: 18px;
}

h3 {
  margin: 3px 0 0;
  font-size: 17px;
}

p {
  color: var(--muted);
  line-height: 1.5;
}

.workspace {
  display: grid;
  grid-template-columns: 320px 1fr;
  grid-template-areas:
    "upload workflow"
    "upload preview"
    "upload changes"
    "upload terminal"
    "summary summary";
  gap: 16px;
}

.upload-panel,
.workflow-panel,
.preview-panel,
.changes-panel,
.terminal-panel,
.summary-panel,
.doc-preview,
.summary-item,
.summary-empty {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}

.upload-panel,
.workflow-panel,
.preview-panel,
.changes-panel,
.terminal-panel,
.summary-panel {
  padding: 18px;
  box-shadow: 0 12px 32px rgba(31, 48, 75, 0.08);
}

.upload-panel { grid-area: upload; }
.workflow-panel { grid-area: workflow; }
.preview-panel { grid-area: preview; }
.changes-panel { grid-area: changes; }
.terminal-panel { grid-area: terminal; }
.summary-panel { grid-area: summary; }

.status-pill,
.preview-count {
  border-radius: 999px;
  padding: 7px 11px;
  font-size: 12px;
  font-weight: 800;
  white-space: nowrap;
}

.status-pill.ok,
.doc-preview.result .preview-count {
  background: #def7e9;
  color: var(--success);
}

.preview-count {
  background: #edf3fb;
  color: var(--muted);
}

.dropzone {
  display: flex;
  min-height: 164px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 7px;
  border: 2px dashed #abc0dc;
  border-radius: 8px;
  background: #f8fbff;
  margin: 16px 0 12px;
  padding: 18px;
  text-align: center;
}

.dropzone.dragging {
  border-color: var(--accent);
  background: #edf5ff;
}

.dropzone input {
  display: none;
}

.drop-title {
  font-size: 18px;
  font-weight: 800;
}

.drop-subtitle,
.file-card {
  color: var(--muted);
  font-size: 14px;
}

.file-card {
  min-height: 44px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 11px 12px;
  overflow-wrap: anywhere;
}

.mode-switch {
  border: 1px solid var(--line);
  border-radius: 8px;
  margin: 14px 0 0;
  padding: 12px;
}

.mode-switch legend {
  padding: 0 6px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 850;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.mode-switch label {
  display: flex;
  align-items: center;
  gap: 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  cursor: pointer;
  margin-top: 8px;
  padding: 11px;
}

.mode-switch label:has(input:checked) {
  border-color: var(--accent);
  background: #edf5ff;
}

.mode-switch label.disabled {
  cursor: not-allowed;
  opacity: 0.64;
}

.mode-switch input {
  width: 16px;
  height: 16px;
  accent-color: var(--accent);
}

.mode-switch span {
  display: grid;
  gap: 2px;
}

.mode-switch strong {
  font-size: 15px;
}

.mode-switch small {
  color: var(--muted);
  font-size: 12px;
  line-height: 1.35;
}

.mode-note {
  margin: 12px 0 0;
  padding: 12px 14px;
  border: 1px solid #d8b84a;
  border-left: 4px solid #c49214;
  border-radius: 8px;
  background: #fff8e6;
  color: #5c4a12;
  font-size: 13px;
  line-height: 1.45;
}

.mode-note strong {
  display: block;
  margin-bottom: 4px;
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.mode-note p {
  margin: 0;
}

button,
.download-link {
  display: inline-flex;
  width: 100%;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  border: 0;
  border-radius: 8px;
  margin-top: 12px;
  background: var(--accent);
  color: #ffffff;
  cursor: pointer;
  font-weight: 800;
  line-height: 1.25;
  overflow-wrap: anywhere;
  padding: 10px 12px;
  text-decoration: none;
}

button:disabled {
  background: #9aa8bd;
  cursor: not-allowed;
}

.download-link {
  background: var(--success);
}

.hidden {
  display: none;
}

.workflow {
  display: grid;
  grid-template-columns: repeat(3, minmax(180px, 1fr));
  gap: 12px;
  margin-top: 18px;
}

.node {
  position: relative;
  min-height: 112px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfdff;
  padding: 14px;
}

.node-status {
  display: inline-flex;
  border-radius: 999px;
  padding: 3px 8px;
  background: #e9edf5;
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
}

.node.done {
  border-color: #9dd8bd;
}

.node.done .node-status {
  background: #def7e9;
  color: var(--success);
}

.node.running {
  border-color: #9fc4ff;
}

.node.running .node-status {
  background: #e2eeff;
  color: var(--accent-dark);
}

.node.error {
  border-color: #efb0ad;
}

.node.error .node-status {
  background: #ffe4e2;
  color: var(--error);
}

.node-title {
  margin: 10px 0 6px;
  font-size: 15px;
  font-weight: 800;
}

.node-detail {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.35;
  overflow-wrap: anywhere;
}

.preview-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-top: 16px;
}

.doc-preview {
  overflow: hidden;
}

.doc-preview.result {
  border-color: #abd9c1;
}

.preview-header {
  align-items: center;
  border-bottom: 1px solid var(--line);
  padding: 14px 16px;
}

#uploadedPreview,
#resultPreview,
#terminal {
  overflow: auto;
  font-family: "Cascadia Mono", Consolas, monospace;
  font-size: 13px;
  line-height: 1.6;
  margin: 0;
  padding: 16px;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

#uploadedPreview,
#resultPreview {
  min-height: 320px;
  max-height: 520px;
  background: #f8fbff;
  color: #1d2a3d;
}

#terminal {
  min-height: 220px;
  max-height: 340px;
  border-radius: 8px;
  background: var(--terminal);
  color: #d1fae5;
  margin-top: 16px;
}

.changes-list {
  display: grid;
  gap: 12px;
  margin-top: 16px;
}

.changes-count,
.changes-empty,
.change-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfdff;
}

.changes-count,
.changes-empty {
  padding: 12px 14px;
  color: var(--muted);
  font-weight: 750;
}

.change-card {
  display: grid;
  grid-template-columns: 64px 1fr 1fr;
  gap: 12px;
  padding: 12px;
}

.change-number {
  display: inline-flex;
  min-height: 38px;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  background: #edf3fb;
  color: var(--accent-dark);
  font-weight: 850;
}

.change-pair {
  min-width: 0;
}

.change-label {
  display: inline-flex;
  border-radius: 999px;
  padding: 3px 8px;
  margin-bottom: 7px;
  font-size: 11px;
  font-weight: 850;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.change-label.before {
  background: #fff1e6;
  color: #a34f00;
}

.change-label.after {
  background: #def7e9;
  color: var(--success);
}

.change-pair code {
  display: block;
  min-height: 48px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #f8fbff;
  color: #1d2a3d;
  font-family: "Cascadia Mono", Consolas, monospace;
  font-size: 12px;
  line-height: 1.55;
  overflow-wrap: anywhere;
  padding: 10px;
  white-space: pre-wrap;
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(140px, 1fr));
  gap: 12px;
}

.summary-item,
.summary-empty {
  padding: 14px;
  background: #fbfdff;
}

.summary-label {
  color: var(--muted);
}

.summary-value {
  margin-top: 6px;
  font-size: 24px;
  font-weight: 850;
}

@media (max-width: 960px) {
  .workspace {
    grid-template-columns: 1fr;
    grid-template-areas:
      "upload"
      "workflow"
      "preview"
      "changes"
      "terminal"
      "summary";
  }

  .workflow,
  .summary-grid,
  .preview-grid,
  .change-card {
    grid-template-columns: 1fr;
  }
}