:root { --chat-bg: #f4f1e9; --chat-out: #d9fdd3; --watermark: none; --watermark-opacity: .06; }
.messages { background-color: var(--chat-bg); position: relative; isolation: isolate; }
#chat-content { position: relative; isolation: isolate; }
#chat-content::after { content: ''; position: absolute; inset: 100px 12% 130px; background: var(--watermark) center / min(65%, 400px) auto no-repeat; opacity: var(--watermark-opacity); pointer-events: none; z-index: -1; }
.messages { background-color: transparent; background-image: none; }
#chat-content { background: var(--chat-bg); }
.bubble.out { background: var(--chat-out); }
.brand-mark { background: var(--green); }
.brand-mark img { max-width: 100%; max-height: 100%; object-fit: contain; }
.appearance-panel { z-index: 40; }
.appearance-form label { display: flex; flex-direction: column; gap: 6px; margin: 15px 0; font-size: 14px; }
.appearance-form input { min-width: 0; width: 100%; }
.appearance-form input[type=color] { height: 44px; padding: 4px; }
.appearance-form input[type=range] { padding: 0; }
.appearance-actions { display: flex; flex-wrap: wrap; gap: 10px; }
.appearance-preview { display: block; max-width: 200px; max-height: 100px; object-fit: contain; margin: 12px 0; }
.appearance-status { color: #a02020; }
.appearance-entry { margin: 12px 0; }