body{
    background:linear-gradient(
        135deg,
        #141e30,
        #243b55
    );
    min-height:100vh;
    font-family:Arial, Helvetica, sans-serif;
}
/* =========================
   CHAT CONTAINER
========================= */
.chat-container{
    background:#1f2937;
    border-radius:20px;
    overflow:hidden;
    box-shadow:
    0 0 20px rgba(0,0,0,0.5);
    animation:fade 1s;
}
/* =========================
   HEADER
========================= */
.chat-header{
    background:#111827;
    color:white;
    padding:15px;
    display:flex;
    align-items:center;
    gap:15px;
    border-bottom:1px solid #333;
}
/* AVATAR */
.avatar{
    width:50px;
    height:50px;
    border-radius:50%;
    border:3px solid #00ff88;
}
/* =========================
   CHAT BOX
========================= */
#chat-box{
    height:450px;
    overflow-y:auto;
    padding:20px;
    background:
    linear-gradient(
        to bottom,
        #1f2937,
        #111827
    );
}
/* MENSAJES */
.message{
    max-width:75%;
    padding:12px 18px;
    margin-bottom:15px;
    border-radius:20px;
    color:white;
    word-wrap:break-word;
    animation:show .3s;
}
/* USUARIO */
.user{
    background:#00b894;
    margin-left:auto;
    border-bottom-right-radius:5px;
}
/* BOT */
.bot{
    background:#374151;
    margin-right:auto;
    border-bottom-left-radius:5px;
}
/* =========================
   INPUT
========================= */
.chat-input{
    display:flex;
    background:#111827;
    padding:15px;
    gap:10px;
}
.chat-input input{
    flex:1;
    border:none;
    outline:none;
    border-radius:30px;
    padding:12px 20px;
    background:#374151;
    color:white;
    font-size:16px;
}
/* BOTON */
.chat-input button{
    width:55px;
    border:none;
    border-radius:50%;
    background:#00b894;
    color:white;
    font-size:20px;
    transition:0.3s;
}
.chat-input button:hover{
    transform:scale(1.1);
    background:#00ff88;
}
/* ANIMACIONES */
@keyframes show{
    from{
        opacity:0;
        transform:translateY(10px);
    }
    to{
        opacity:1;
        transform:translateY(0);
    }
}
@keyframes fade{
    from{
        opacity:0;
    }
    to{
        opacity:1;
    }
}
/* RESPONSIVE */
@media(max-width:768px){
    #chat-box{
        height:350px;
    }
}