fix: Custom Quote modal text visibility and close button

- Dark text (#171c26) for all form fields in modal on ivory background
- Explicit colors for labels, inputs, placeholders
- Close button (X) now visible with midnight background

style.css

@@ -663,7 +663,7 @@ img { max-width: 100%; height: auto; vertical-align: middle; }
   transition: all 0.2s;
 }
 .ow-close:hover { background: var(--cream); color: var(--ink); }
-.ow-content { padding: 2rem; }
+.ow-content { padding: 2rem; color: var(--ink); }
 .ow-title { font-family: Marcellus, Georgia, serif; font-size: clamp(1rem, 2vw, 1.24rem); margin-bottom: 0.5rem; color: var(--midnight); }
 .ow-price { font-size: 0.85rem; color: var(--ink-soft); margin-bottom: 1rem; }
 .ow-price .ow-price-amount { font-size: 1rem; font-weight: 600; color: var(--midnight); }