:root {
  --bg: #0a0f17;
  --panel: #0f1725;
  --line: #24314a;
  --text: #eaf0ff;
  --muted: #9fb0d0;
  --accent: #63b3ff;
  --success: #22c55e;
  --warn: #f59e0b;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: radial-gradient(900px 400px at 20% -10%, rgba(99,179,255,0.16), transparent 60%), var(--bg);
  color: var(--text);
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
}

.app-shell { max-width: 1200px; margin: 0 auto; padding: 28px 18px 40px; display: grid; gap: 18px; }
.app-header h1 { margin: 0 0 8px; font-size: 2rem; }
.app-header p { margin: 0; color: var(--muted); }

.card { border: 1px solid var(--line); border-radius: 14px; background: linear-gradient(180deg, rgba(15, 23, 37, 0.95), rgba(10, 15, 23, 0.95)); padding: 18px; }
h2 { margin: 0 0 10px; font-size: 1.2rem; }
h3 { margin: 0 0 8px; }
.muted { color: var(--muted); }

input[type="file"], select { width: 100%; background: #0d1521; color: var(--text); border: 1px solid var(--line); border-radius: 10px; padding: 10px; }
.row { display: grid; gap: 8px; margin-top: 10px; }
.row.inline { grid-template-columns: repeat(3, minmax(0, 1fr)); }

.btn { border: none; border-radius: 10px; padding: 10px 12px; font-weight: 700; cursor: pointer; background: var(--accent); color: #071426; }
.btn.secondary { background: #d2e6ff; }
.btn.ghost { background: transparent; color: var(--text); border: 1px solid var(--line); }
.btn:disabled { opacity: 0.6; cursor: not-allowed; }

.status { margin-top: 10px; border-radius: 10px; padding: 10px; border: 1px solid var(--line); font-size: 0.95rem; }
.status.idle { color: var(--muted); }
.status.working { color: var(--warn); }
.status.done { color: var(--success); }
.status.error { color: #fca5a5; }

.preview-grid { display: grid; gap: 12px; grid-template-columns: 1fr 1fr; }
.preview-pane {
  border: 1px solid var(--line);
  border-radius: 10px;
  min-height: 340px;
  max-height: 620px;
  overflow: auto;
  padding: 12px;
  background: #09101a;
  white-space: pre-wrap;
  line-height: 1.45;
}

.preview-pane .pdf-page {
  position: relative;
  width: 100%;
  margin-bottom: 12px;
  border: 1px solid #2d3b58;
  background: #fff;
  color: #111;
  overflow: hidden;
}

.preview-pane .pdf-page span {
  font-family: Arial, Helvetica, sans-serif;
}

@media (max-width: 900px) {
  .preview-grid, .row.inline { grid-template-columns: 1fr; }
}