:root {
  --color-bg: #f4f5f7;
  --color-panel: #ffffff;
  --color-border: #d8dce1;
  --color-accent: #2f6fed;
  --color-accent-dark: #1d4fc4;
  --color-danger: #d64545;
  --color-text: #20242b;
  --color-muted: #6b7280;
  --radius: 8px;
  --gap: 16px;
  font-size: 15px;
}

* { box-sizing: border-box; }

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

.topbar {
  background: var(--color-accent);
  color: #fff;
  padding: 20px 32px;
}
.topbar h1 { margin: 0; font-size: 1.6rem; }
.topbar .tagline { margin: 4px 0 0; opacity: .9; font-size: .95rem; }

.layout {
  display: grid;
  grid-template-columns: 280px 280px 1fr;
  gap: var(--gap);
  padding: var(--gap);
  align-items: start;
}

@media (max-width: 1000px) {
  .layout { grid-template-columns: 1fr; }
}

.panel {
  background: var(--color-panel);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 18px;
}

.panel h2 { margin-top: 0; font-size: 1.05rem; }
.panel h3 { font-size: .9rem; color: var(--color-muted); margin: 16px 0 8px; }

.panel-canvas { grid-row: span 2; }

.row { display: flex; gap: 8px; align-items: center; margin-bottom: 12px; flex-wrap: wrap; }

select, input[type=text] {
  padding: 8px 10px;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  font-size: .9rem;
  flex: 1;
}

button {
  cursor: pointer;
  border: none;
  border-radius: 6px;
  padding: 9px 14px;
  font-size: .9rem;
  font-weight: 600;
  transition: background .15s ease;
}
.btn-primary { background: var(--color-accent); color: #fff; }
.btn-primary:hover { background: var(--color-accent-dark); }
.btn-secondary { background: #eef0f3; color: var(--color-text); }
.btn-secondary:hover { background: #e1e4e9; }
.btn-danger { background: #fbeaea; color: var(--color-danger); }
.btn-danger:hover { background: #f6d6d6; }
.btn-large { width: 100%; padding: 12px; font-size: 1rem; }

.dropzone {
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  border: 2px dashed var(--color-border);
  border-radius: var(--radius);
  padding: 28px 12px;
  cursor: pointer;
  color: var(--color-muted);
  font-size: .9rem;
}
.dropzone.dragover { border-color: var(--color-accent); background: #eef3fe; }
.dropzone small { color: #9aa1ab; }

.status { font-size: .85rem; margin-top: 8px; min-height: 1.2em; }
.status.error { color: var(--color-danger); }
.status.success { color: #1c8a4b; }

.summary { font-size: .85rem; margin-top: 10px; }
.summary p { margin: 4px 0; }
.hidden { display: none !important; }

.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip {
  background: #eef3fe;
  color: var(--color-accent-dark);
  border: 1px solid #cfe0fb;
  border-radius: 999px;
  padding: 5px 12px;
  font-size: .8rem;
  cursor: pointer;
  user-select: none;
}
.chip:hover { background: #dde9fd; }

.hint { font-size: .78rem; color: var(--color-muted); margin-top: 6px; }

/* ---- Page canvas: scaled to real paper proportions via CSS aspect-ratio ---- */
.page-canvas {
  position: relative;
  background: #fff;
  border: 1px solid var(--color-border);
  box-shadow: 0 2px 10px rgba(0,0,0,.06);
  margin: 0 auto;
  width: 100%;
  max-width: 612px; /* 8.5in @ 72px/in reference scale */
  background-image:
    linear-gradient(to right, #f0f1f3 1px, transparent 1px),
    linear-gradient(to bottom, #f0f1f3 1px, transparent 1px);
  background-size: 24px 24px;
  overflow: hidden;
}
.page-letter { aspect-ratio: 8.5 / 11; }
.page-a4     { aspect-ratio: 8.27 / 11.69; }
.page-legal  { aspect-ratio: 8.5 / 14; }

.field-box {
  position: absolute;
  border: 1px solid var(--color-accent);
  background: rgba(47, 111, 237, 0.08);
  font-size: 12px;
  line-height: 1.3;
  padding: 2px 4px;
  overflow: hidden;
  cursor: move;
  white-space: pre-wrap;
}
.field-box.text-field { border-style: dashed; border-color: #8a8f99; background: rgba(0,0,0,.04); }
.field-box.selected { outline: 2px solid var(--color-accent-dark); }
.field-box .resize-handle {
  position: absolute;
  right: -4px; bottom: -4px;
  width: 10px; height: 10px;
  background: var(--color-accent-dark);
  border-radius: 2px;
  cursor: nwse-resize;
}

.field-inspector {
  margin-top: 16px;
  border-top: 1px solid var(--color-border);
  padding-top: 12px;
}
.field-inspector .inspector-row {
  display: flex;
  gap: 8px;
  align-items: center;
  margin-bottom: 8px;
}
.field-inspector label { font-size: .78rem; color: var(--color-muted); width: 70px; }
.field-inspector input, .field-inspector select { width: 100%; padding: 6px 8px; }

.foot {
  text-align: center;
  padding: 18px;
  color: var(--color-muted);
  font-size: .8rem;
}

/* ---- Limits info box ---- */
.limits-box {
  margin-top: 18px;
  border-top: 1px solid var(--color-border);
  padding-top: 14px;
}
.limits-box h3 {
  margin: 0 0 10px;
  font-size: .85rem;
  color: var(--color-muted);
  text-transform: uppercase;
  letter-spacing: .04em;
}
.limits-table {
  width: 100%;
  border-collapse: collapse;
  font-size: .82rem;
}
.limits-table th {
  text-align: left;
  font-weight: 600;
  padding: 4px 8px 4px 0;
  white-space: nowrap;
  color: var(--color-text);
}
.limits-table td {
  padding: 4px 8px 4px 0;
  color: var(--color-text);
}
.limits-table td:nth-child(2) {
  font-weight: 700;
  color: var(--color-accent-dark);
  white-space: nowrap;
  padding-right: 12px;
}
.limit-note { color: var(--color-muted); }
.limit-footer {
  margin: 10px 0 0;
  font-size: .75rem;
  color: var(--color-muted);
}
.limit-footer code {
  background: #eef0f3;
  padding: 1px 4px;
  border-radius: 3px;
  font-size: .78rem;
}
.loading { color: #bbb; font-style: italic; }

/* ---- Truncation warning ---- */
.trunc-warn {
  background: #fff8e1;
  border: 1px solid #f4c430;
  border-radius: 6px;
  padding: 8px 10px;
  font-size: .82rem;
  color: #7a5c00;
  margin-top: 8px;
}