:root { --co-bg:#f6f7fb; --co-card:#fff; --co-border:#e5e7eb; --co-text:#1f2937; --co-muted:#6b7280; --co-primary:#2563eb; --co-primary-contrast:#fff; --co-shadow:0 6px 20px rgba(0,0,0,0.06); --co-radius:14px; }
.co-layout { display:grid; grid-template-columns: 1.2fr 0.8fr; gap: 20px; align-items:start; } .co-form { display:block; }
.co-card { background:var(--co-card); border:1px solid var(--co-border); border-radius:var(--co-radius); box-shadow:var(--co-shadow); padding:16px; }
.co-grid { display:grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 14px; margin-top:12px; }
.co-field { display:flex; flex-direction:column; gap:6px; }
.co-field label { color:var(--co-text); font-weight:600; }
.co-field input[type='number'], .co-field input[type='text'], .co-field textarea, .co-field select, .co-field input[type='file'] { padding:10px; border:1px solid var(--co-border); border-radius:10px; background:#fff; color:var(--co-text); }
.co-extras { display:flex; gap:12px; flex-wrap:wrap; }
.co-cta { margin-top:14px; display:inline-block; padding:12px 16px; border-radius:12px; background:var(--co-primary); color:var(--co-primary-contrast); border:0; cursor:pointer; font-weight:700; box-shadow:var(--co-shadow); }
.co-cta:hover { filter: brightness(0.95); }
.co-side { display:flex; flex-direction:column; gap:20px; } .co-sticky { position:sticky; top:16px; }
.co-viewer canvas { width:100%; height:auto; border:1px dashed var(--co-border); border-radius:10px; background:#fff; }
.co-page-indicator { color:var(--co-muted); font-size:0.9rem; margin-top:6px; }
.co-nav { display:flex; gap:8px; margin-top:6px; } .co-btn { padding:6px 10px; border:1px solid var(--co-border); background:#fff; border-radius:8px; cursor:pointer; }
.co-btn:hover { background:#f3f4f6; } .co-total input { width:140px; text-align:right; font-size:1.1rem; font-weight:700; }
@media (max-width: 980px) { .co-layout { grid-template-columns: 1fr; } .co-grid { grid-template-columns: 1fr; } .co-sticky { position:static; } }