body{
    margin:0;
    padding:0;
    background:#F5F7FA;
    font-family:"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
    color:#1F2937;
}
.main-container{
    min-height:100vh;
    display:flex;
    justify-content:center;
    align-items:center;
    padding:20px;
}
.zeki-card{
    width:100%;
    max-width:430px;
    background:#FFFFFF;
    border-radius:20px;
    padding:30px 25px;
    box-shadow:0 10px 30px rgba(0,0,0,0.08);
}
.zeki-logo{
    width:90px;
    height:90px;
    object-fit:contain;
}
.zeki-title{
    color:#0B3C5D;
    font-size:28px;
    font-weight:700;
    margin-top:15px;
}
.zeki-subtitle{
    color:#6B7280;
    font-size:15px;
    margin-top:5px;
}
.form-control{
    height:48px;
    border-radius:12px;
    border:1px solid #D1D5DB;
    font-size:16px;
}
.form-label{
    font-weight:600;
    margin-bottom:6px;
}
.btn-zeki{
    height:50px;
    background:#0B3C5D;
    border:none;
    border-radius:14px;
    color:white;
    font-size:17px;
    font-weight:600;
}
.btn-zeki:hover{
    background:#092F47;
}
.chat-card{
    width:100%;
    max-width:600px;
    height:90vh;
    background:#FFFFFF;
    border-radius:20px;
    display:flex;
    flex-direction:column;
    overflow:hidden;
    box-shadow:0 10px 30px rgba(0,0,0,0.08);
}
.chat-header{
    padding:15px;
    text-align:center;
    border-bottom:1px solid #E5E7EB;
}
.chat-header img{
    width:55px;
    height:55px;
}
.chat-name{
    color:#0B3C5D;
    font-size:20px;
    font-weight:700;
}
.chat-status{
    color:#6B7280;
    font-size:13px;
}
.messages{
    flex:1;
    overflow-y:auto;
    overflow-x:hidden;
    padding:20px;
    scroll-behavior:smooth;
}
.message{
    max-width:75%;
    padding:12px 16px;
    border-radius:18px;
    margin-bottom:12px;
    font-size:15px;
    line-height:1.5;
}
.user-message{
    margin-left:auto;
    background:#0B3C5D;
    color:white;
    border-bottom-right-radius:5px;
}
.bot-message{
    margin-right:auto;
    background:#ECEFF3;
    color:#1F2937;
    border-bottom-left-radius:5px;
}
.chat-input{
    padding:12px;
    border-top:1px solid #E5E7EB;
}
.chat-input input{
    height:48px;
    border-radius:24px;
}
.send-button{
    width:48px;
    height:48px;
    border-radius:50%;
    background:#0B3C5D;
    color:white;
    border:none;
}
.message-box{
resize:none;
min-height:48px;
max-height:120px;
overflow-y:auto;
border-radius:24px!important;
padding:12px 18px;
}
.typing span{
animation:blink 1.4s infinite;
}
.typing span:nth-child(2){
animation-delay:.2s;
}
.typing span:nth-child(3){
animation-delay:.4s;
}
@keyframes blink{
0%{
opacity:.2;
}
20%{
opacity:1;
}
100%{
opacity:.2;
}
}

.conversation-card{
background:#ffffff;
border-radius:20px;
padding:25px;
text-align:center;
box-shadow:0 10px 30px rgba(0,0,0,.08);
margin:20px auto;
max-width:420px;
transition:.3s;
}

.conversation-card:hover{
transform:scale(1.02);
}

.card-icon{
font-size:40px;
margin-bottom:15px;
}

.card-title{
font-size:22px;
font-weight:600;
color:#0B3C5D;
}

.card-message{
margin-top:15px;
color:#555;
line-height:1.5;
}

.card-button{
margin-top:25px;
background:#0B3C5D;
color:white;
border:none;
border-radius:15px;
padding:14px 25px;
font-size:16px;
cursor:pointer;
}


@media(max-width:600px){
    .main-container{
        padding:10px;
    }
    .zeki-card{
        padding:25px 20px;
    }
    .chat-card{
        height:100dvh;
        border-radius:0;
    }
}