:root {
  --bg: #f4f4f1;
  --panel: rgba(255,255,255,0.82);
  --ink: #131313;
  --muted: #606060;
  --border: #d7d7d0;
  --shadow: 0 16px 42px rgba(0,0,0,0.10);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  min-height: 100%;
  background: linear-gradient(180deg, #f7f7f6, #ecebe8);
  color: var(--ink);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

body { overflow-x: hidden; }

.app {
  display: grid;
  grid-template-columns: 390px minmax(0, 1fr);
  gap: 18px;
  padding: 18px;
  min-height: 100vh;
}

.panel, .previewPanel {
  background: var(--panel);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(0,0,0,0.06);
  border-radius: 26px;
  box-shadow: var(--shadow);
}

.panel {
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.titleRow {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 12px;
}

.eyebrow {
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 6px;
}

h1 {
  font-size: 1.35rem;
  line-height: 1.15;
  margin: 0;
}

.label {
  font-weight: 700;
  font-size: 0.95rem;
}

textarea {
  width: 100%;
  min-height: 240px;
  resize: vertical;
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 14px;
  font-size: 1rem;
  line-height: 1.45;
  background: #fff;
  color: var(--ink);
  outline: none;
}

textarea:focus,
input:focus,
select:focus,
button:focus {
  box-shadow: 0 0 0 3px rgba(20,20,20,0.10);
}

.controls {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.controls label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.9rem;
  color: var(--muted);
}

.controls input[type="number"],
.controls select {
  width: 100%;
  border-radius: 12px;
  border: 1px solid var(--border);
  padding: 10px 12px;
  background: white;
  color: var(--ink);
}

.controls input[type="range"] {
  width: 100%;
}

.buttons {
  display: grid;
  grid-template-columns: repeat(2, minmax(0,1fr));
  gap: 10px;
}

.buttons .full { grid-column: 1 / -1; }

button {
  appearance: none;
  border: 0;
  border-radius: 16px;
  background: #131313;
  color: white;
  padding: 12px 14px;
  font-weight: 700;
  font-size: 0.96rem;
  cursor: pointer;
}

button.secondary, button.ghost {
  background: #ecebe7;
  color: #141414;
}

.hint, .status {
  margin: 0;
  color: var(--muted);
  font-size: 0.93rem;
}

.previewPanel {
  padding: 18px;
  overflow: auto;
}

.preview {
  display: grid;
  gap: 18px;
  justify-items: center;
  align-content: start;
}

.pageCanvas {
  width: min(100%, 980px);
  height: auto;
  display: block;
  border-radius: 16px;
  box-shadow: 0 20px 45px rgba(0,0,0,0.14);
  background: #fff;
}

@media (max-width: 980px) {
  .app { grid-template-columns: 1fr; }
  .panel { position: sticky; top: 0; z-index: 1; }
}

@media print {
  body { background: #fff; }
  .panel { display: none; }
  .previewPanel {
    box-shadow: none;
    border: 0;
    padding: 0;
    background: #fff;
  }
  .preview {
    gap: 0;
  }
  .pageCanvas {
    width: 210mm;
    height: 297mm;
    box-shadow: none;
    border-radius: 0;
    page-break-after: always;
    break-after: page;
  }
}