.course-chat{max-width:880px;margin:1rem auto;padding:clamp(16px,3vw,28px);border:1px solid #dbe6ed;border-radius:20px;background:#fff;color:#17344f}.course-chat header{display:flex;align-items:center;justify-content:space-between;gap:12px}.course-chat h3{margin:0}.course-chat label{display:grid;gap:8px;margin:12px 0;font-weight:600}.course-chat select,.course-chat textarea{box-sizing:border-box;width:100%;min-width:0;padding:12px;border:1px solid #b9cbd9;border-radius:12px;background:white;color:inherit;font:inherit}.course-chat button{min-height:44px;padding:10px 16px;border:1px solid #b9cbd9;border-radius:10px;background:#edf4fa;color:#17344f;font:inherit;cursor:pointer}.course-chat button:disabled{opacity:.5;cursor:default}.course-chat button:focus-visible,.course-chat select:focus-visible,.course-chat textarea:focus-visible{outline:3px solid #e89539;outline-offset:3px}.course-chat form button{background:#17344f;color:white}.course-chat-audience{padding:12px;background:#eef6fc;border-radius:12px;font-size:.95rem}.course-chat-messages{list-style:none;padding:0;display:grid;gap:12px;max-height:480px;overflow-y:auto;overflow-wrap:anywhere}.course-chat-messages li{background:#f5f8fa;padding:12px;border-radius:14px}.course-chat-messages li.own{background:#fff4e7}.course-chat-messages li>div{display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap}.course-chat time{font-size:.75rem;color:#607286}.course-chat-messages p{white-space:pre-wrap;overflow-wrap:anywhere}.course-chat-messages button{font-size:.8rem;padding:6px 12px}.course-chat small{display:block;color:#607286;line-height:1.7}@media(max-width:480px){.course-chat{padding:14px;border-radius:14px}.course-chat h3{font-size:1.1rem}.course-chat-messages{max-height:400px}}