.c2book-container { max-width: 420px; margin: 1em auto; padding: 1.2em; border: 1px solid #ddd; border-radius: 8px; font-family: system-ui, sans-serif; }
.c2book-fields > div { margin-bottom: .8rem; }
.c2book-fields label { display:block; margin-bottom: .3rem; font-weight: 600; }
.c2book-fields input, .c2book-fields select { width:100%; padding:.5rem; border:1px solid #ccc; border-radius:4px; }
.c2book-container .description { font-size:.85rem; color:#666; }
.c2book-container .c2book-send { width:100%; padding:.75rem; border:0; border-radius:5px; background:#1aab5b; color:#fff; font-weight:700; cursor:pointer; }
.c2book-container .c2book-send:hover { filter: brightness(0.95); }