* {
  margin:0;
  padding:0;
  box-sizing:border-box;
  font-family:'Ubuntu',sans-serif;
}

body {
  background: radial-gradient(circle, #020617, #0f172a);
  color:white;
}

/* HERO */
.hero {
  text-align:center;
  padding:120px 20px;
}

.hero h1 {
  font-size:50px;
}

.hero button {
  margin-top:20px;
  padding:12px 25px;
  background:#22c55e;
  border:none;
  border-radius:10px;
  cursor:pointer;
}

/* HEADER */
.header {
  text-align:center;
  padding:15px;
  font-size:20px;
  font-weight:700;
}

/* CHAT */
.chat {
  height:65vh;
  overflow-y:auto;
  padding:10px;
}

/* MESSAGE */
.msg {
  padding:12px;
  margin:8px 0;
  border-radius:12px;
  max-width:80%;
  animation:fadeIn 0.3s ease;
}

.user {
  background:#3b82f6;
  margin-left:auto;
}

.bot {
  background:#1e293b;
}

/* INPUT */
.input-area {
  display:flex;
  gap:5px;
  padding:10px;
}

input {
  flex:1;
  padding:12px;
  border:none;
  border-radius:10px;
  outline:none;
}

button {
  padding:10px;
  border:none;
  border-radius:10px;
  cursor:pointer;
  transition:0.2s;
}

button:hover {
  transform:scale(1.05);
}

@keyframes fadeIn {
  from {opacity:0; transform:translateY(10px);}
  to {opacity:1; transform:translateY(0);}
}