/* =========================
   HT COURSES – PREMIUM AI UI
   (White buttons + Light Blue Border)
   ========================= */

:root{
  --deep-navy:#07172E;
  --lux-blue:#0A1F44;
  --glow-blue:#2F7CFF;
  --soft-text:#D6E4FF;
  --pure-white:#ffffff;
}

*{box-sizing:border-box}

body{
  margin:0;
  font-family:"Segoe UI",system-ui,-apple-system,sans-serif;
}

/* === Container === */
.chatbot-container{
  width:380px;
  position:fixed;
  bottom:20px;
  right:20px;
  background:linear-gradient(160deg,var(--deep-navy),var(--lux-blue));
  border-radius:18px;
  box-shadow:0 20px 60px rgba(0,0,0,.55);
  overflow:hidden;
  color:#fff;
}

/* === Header === */
.chatbot-header{
  background:linear-gradient(135deg,#071a33,#0a2550);
  padding:14px 16px;
  display:flex;
  align-items:center;
  gap:12px;
  border-bottom:1px solid rgba(255,255,255,.08);
}

.chatbot-logo{
  width:64px;          /* বড় লোগো */
  height:auto;
  border-radius:0;
  background:transparent;
  padding:0;

  /* 🖤 Deep Black Premium Shadow */
  filter:
    drop-shadow(0 12px 22px rgba(0,0,0,.75))
    drop-shadow(0 6px 10px rgba(0,0,0,.55));
}



.chatbot-title{line-height:1.2}
.chatbot-title h3{
  margin:0;
  font-size:16px;
  color:#e9f1ff;
}
.chatbot-title span{
  font-size:11px;
  color:#9fc4ff;
}

/* === Chat Area === */
.chatbox{
  height:340px;
  overflow-y:auto;
  padding:16px;
  background:
    radial-gradient(circle at top right,rgba(47,124,255,.12),transparent 60%),
    radial-gradient(circle at bottom left,rgba(255,255,255,.06),transparent 60%);
}

/* === BOT MESSAGE (Premium Light Blue Border + Bottom Glow) === */
.bot-message{
  background:linear-gradient(145deg,#0f2c57,#0b1f3f);
  border-radius:16px;
  padding:12px 14px;
  margin-bottom:12px;
  line-height:1.5;
  font-size:14px;
  color:var(--soft-text);

  /* চারপাশে চিকন উজ্জ্বল লাইট-ব্লু বর্ডার */
  border:1px solid rgba(120,180,255,.55);

  /* সাইডে হাইলাইট নয় — নিচে উজ্জ্বল গ্লো */
  box-shadow:
    0 10px 28px rgba(47,124,255,.35),
    inset 0 0 0 1px rgba(255,255,255,.04);
}

/* === Welcome Message (same style, little stronger glow) === */
.bot-message.welcome{
  background:linear-gradient(145deg,#122f60,#0b1f3f);
  border:1px solid rgba(120,180,255,.6);
  box-shadow:
    0 12px 32px rgba(47,124,255,.4),
    inset 0 0 0 1px rgba(255,255,255,.05);
}

/* === USER MESSAGE (White Bubble) === */
.user-message{
  background:linear-gradient(135deg,#ffffff,#f1f4ff);
  color:#07172E;
  padding:12px 14px;
  border-radius:16px;
  margin:10px 0;
  text-align:right;
  font-weight:600;
  box-shadow:0 6px 18px rgba(255,255,255,.4);
}

/* === Input Area === */
.input-area{
  background:linear-gradient(135deg,#071a33,#081f3d);
  padding:12px;
  display:flex;
  gap:8px;
  align-items:center;
  border-top:1px solid rgba(255,255,255,.08);
}

.input-area input{
  flex:1;
  padding:10px 12px;
  border-radius:10px;
  border:none;
  outline:none;
  background:#06152c;
  color:#fff;
  font-size:14px;
}

.input-area input::placeholder{
  color:#9fb6d8;
}

/* === Buttons (White) === */
.btn-send,
.mic-btn{
  background: linear-gradient(135deg,#ffffff,#eaeaea);
  color:#07172E;
  border:none;
  border-radius:999px;
  cursor:pointer;
  font-weight:700;
  box-shadow:0 6px 22px rgba(255,255,255,.4);
  transition:.25s ease;
}

.btn-send{
  padding:10px 16px;
}

.mic-btn{
  width:42px;
  height:42px;
  font-size:18px;
  display:flex;
  align-items:center;
  justify-content:center;
}

.btn-send:hover,
.mic-btn:hover{
  transform:translateY(-2px);
  box-shadow:0 10px 32px rgba(255,255,255,.7);
}