*{box-sizing:border-box}html,body{margin:0;height:100%;font-family:Arial,sans-serif;background:#f5f5f5;color:#222}button,input,textarea{font:inherit}button{cursor:pointer}.client-body,.login-body{display:grid;place-items:center;padding:16px}.start-card,.login-card{width:min(430px,100%);background:#fff;border:1px solid #ccc;border-radius:10px;padding:24px}.start-card h1,.login-card h1{margin:0 0 10px}.start-card p{color:#666}.start-card label,.login-card label{display:grid;gap:6px;margin:14px 0}.start-card input,.login-card input{width:100%;min-height:44px;border:1px solid #bbb;border-radius:6px;padding:9px 10px}.start-card button,.login-card button{width:100%;min-height:44px;border:1px solid #777;border-radius:6px;background:#eee}.error{padding:10px;border:1px solid #d99;background:#fee;color:#900;border-radius:6px}.chat-shell{height:min(760px,calc(100vh - 24px));width:min(720px,calc(100vw - 24px));background:#fff;border:1px solid #ccc;border-radius:10px;overflow:hidden;display:grid;grid-template-rows:auto 1fr auto}.chat-shell>header{padding:14px 16px;border-bottom:1px solid #ddd}.chat-shell header div{display:grid}.chat-shell small{color:#666}.messages{overflow:auto;padding:16px;display:flex;flex-direction:column;gap:10px;background:#fafafa}.msg{max-width:76%;display:grid;gap:4px}.msg>div{padding:10px 12px;border-radius:8px;background:#fff;border:1px solid #ccc;white-space:pre-wrap;overflow-wrap:anywhere}.msg.mine{align-self:flex-end}.msg.mine>div{background:#e8f0ff}.msg.theirs{align-self:flex-start}.msg small{font-size:12px;color:#777}.image-link{display:block;margin-top:8px}.image-link img{display:block;max-width:280px;max-height:320px;border-radius:6px}.composer{display:flex;gap:8px;padding:12px;border-top:1px solid #ddd;background:#fff;align-items:flex-end}.composer textarea{resize:none;max-height:140px;flex:1;min-height:44px;border:1px solid #bbb;border-radius:6px;padding:9px 10px}.composer button,.attach{border:1px solid #777;background:#eee;color:#222;border-radius:6px;width:44px;height:44px;display:grid;place-items:center}.attach input{display:none}@media(max-width:700px){html,body{font-size:16px}.chat-shell{width:100vw;height:100vh;border:0;border-radius:0}.start-card,.login-card{border-radius:8px}}