* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; background: #f4f5f7; color: #172b4d; }
.hidden { display: none !important; }
.panel { max-width: 600px; margin: 20px auto; background: white; border-radius: 8px; border: 1px solid #dfe1e6; padding: 20px; }
.header-box h2 { font-size: 1.1rem; margin-bottom: 6px; }
.header-box p { font-size: 0.85rem; color: #6b778c; margin-bottom: 15px; }
input { width: 100%; padding: 10px; margin-bottom: 12px; border: 1px solid #ccc; border-radius: 4px; font-size: 16px; }
button { width: 100%; padding: 10px; background: #0052cc; color: white; border: none; border-radius: 4px; font-weight: bold; cursor: pointer; }
.top-bar { display: flex; justify-content: space-between; align-items: center; border-bottom: 1px solid #ebecf0; padding-bottom: 10px; font-size: 0.85rem; }
.abort-btn { width: auto; padding: 5px 10px; background: #de350b; font-size: 0.8rem; }
#message-container { height: 60vh; overflow-y: scroll; border: 1px solid #ebecf0; margin: 15px 0; padding: 10px; border-radius: 4px; }
.msg-row { margin-bottom: 8px; font-size: 0.9rem; line-height: 1.4; word-break: break-word; }
#send-form { display: flex; gap: 8px; }
#send-form input { margin-bottom: 0; }
#send-form button { width: auto; padding: 0 15px; }
.inline-attach-btn { background: #42526e; font-size: 0.75rem; margin-top: 5px; }