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

body {
  background: #0f172a;
  height: 100vh;
}

.app {
  max-width: 420px;
  height: 100vh;
  margin: auto;
  background: #020617;
  display: flex;
  flex-direction: column;
  position: relative;
}

/* Top Bar */
.topbar {
  height: 50px;
  background: #020617;
  color: #38bdf8;
  display: flex;
  align-items: center;
  padding: 0 10px;
  gap: 10px;
}

.topbar button {
  background: none;
  color: white;
  font-size: 22px;
  border: none;
}

/* Sidebar */
.sidebar {
  position: absolute;
  top: 50px;
  left: -200px;
  width: 200px;
  height: 100%;
  background: #020617;
  padding: 15px;
  transition: 0.3s;
}

.sidebar.show {
  left: 0;
}

.sidebar button {
  width: 100%;
  margin-top: 10px;
}

/* Chat */
.chat-area {
  flex: 1;
  padding: 10px;
  overflow-y: auto;
}

.msg {
  margin: 8px 0;
  padding: 8px 12px;
  border-radius: 10px;
  max-width: 80%;
}

.user {
  background: #2563eb;
  color: white;
  margin-left: auto;
}

.bot {
  background: #1e293b;
  color: #e5e7eb;
}

/* Input */
.input-box {
  display: flex;
  padding: 10px;
  gap: 8px;
}

.input-box input {
  flex: 1;
  padding: 10px;
  border-radius: 20px;
  border: none;
}

.input-box button {
  border-radius: 50%;
  width: 40px;
  border: none;
  background: #38bdf8;
}