body{font-family:Arial, Helvetica, sans-serif;background:linear-gradient(180deg,#e9f8ff,#f5fbff);color:#10303a;margin:0}
.header{display:flex;justify-content:space-between;padding:16px;max-width:1100px;margin:auto}
.logo{font-weight:800}
.nav{display:flex;gap:8px;align-items:center}
.btn{background:#29a8ff;color:#fff;padding:8px 12px;border-radius:8px;border:none}
.linkBtn{background:transparent;border:none;padding:8px 12px;cursor:pointer}
.container{max-width:1100px;margin:18px auto;padding:12px}
.card{background:#fff;padding:16px;border-radius:12px;box-shadow:0 8px 24px rgba(16,32,40,0.06)}
.chat{display:flex;flex-direction:column;height:420px}
.messages{flex:1;overflow:auto;padding:12px;border-radius:10px;background:#fbfeff;border:1px solid rgba(16,48,64,0.04)}
.inputRow{display:flex;gap:8px;margin-top:10px}
.inputRow input{flex:1;padding:10px;border-radius:8px;border:1px solid rgba(16,48,64,0.06)}
.whatsapp{position:fixed;right:18px;bottom:18px;background:#25D366;color:#fff;padding:12px;border-radius:50%}