body{margin:0;min-height:100vh;display:flex;align-items:center;justify-content:center;font-family:Inter,system-ui,sans-serif;background:radial-gradient(circle at top left,#000,#0353a8);}
.chat-wrapper{width:100%;max-width:600px;min-height:500px;background:#fff;border-radius:18px;box-shadow:0 20px 40px rgba(0,0,0,.2);display:flex;flex-direction:column;overflow:hidden;}
.chat-header{padding:15px 20px;color:#fff;font-weight:600;display:flex;align-items:center;gap:12px;background:linear-gradient(90deg,#0353a8,#333742);font-size:1.3rem;border-bottom:1px solid #000;}
.powered{font-size:.7rem;opacity:.9;}
.chat-body{flex:1;padding:20px;overflow-y:auto;background:#404040;scroll-behavior:smooth;}
.message{max-width:80%;padding:10px 14px;margin-bottom:12px;border-radius:14px;font-size:.95rem;line-height:1.4;word-wrap:break-word;white-space:pre-wrap;display:flex;align-items:flex-start;justify-content:space-between;position:relative;animation:fadeInUp 0.3s ease;}
.message-user{background:linear-gradient(90deg,#0072ff,#00c6ff);color:#fff;margin-left:auto;border-bottom-right-radius:4px;}
.message-bot{background:linear-gradient(90deg,#ebfaff,#d1f0ff);color:#222;border:1px solid #dedede;margin-right:auto;border-bottom-left-radius:4px;}
.message-bot:hover{box-shadow:0 4px 20px rgba(0,0,0,0.2);transform:translateY(-2px);transition:all 0.2s ease;}
.message-content{flex:1;}
.action-buttons{display:flex;gap:4px;margin-left:8px;align-items:center;position:relative;}
.copy-btn,.translate-btn{cursor:pointer;font-size:0.9rem;color:#333742;transition:all 0.2s ease;}
.copy-btn:hover,.translate-btn:hover{color:#0072ff;transform:scale(1.2);}
.lang-badge{font-size:0.7rem;background:#333742;color:#fff;padding:2px 5px;border-radius:6px;}
.chat-footer{padding:15px 20px;background:linear-gradient(90deg,#333742,#0353a8);display:flex;flex-direction:column;}
textarea{resize:none;border-radius:12px;padding:10px;width:100%;}
button{align-self:flex-end;}
@keyframes fadeInUp{0%{opacity:0;transform:translateY(10px);}100%{opacity:1;transform:translateY(0);}}
.lang-menu{position:absolute;top:100%;right:0;background:#fff;border:1px solid #ccc;border-radius:8px;box-shadow:0 4px 12px rgba(0,0,0,0.2);z-index:100;min-width:130px;}
.lang-item{padding:5px 10px;cursor:pointer;display:flex;align-items:center;gap:6px;}
.lang-item:hover{background:#f0f0f0;border-radius:6px;}