* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", sans-serif;
  background: linear-gradient(180deg, #0b2c5f, #071a3a);
}

/* PAGE CENTER */
.page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* CHAT CARD */
.chat-card {
  width: 100%;
  max-width: 560px;
  height: 82vh;
  background: #0b2c5f;
  border-radius: 18px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: 0 20px 40px rgba(0,0,0,0.35);
}

/* HEADER */
.header {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 18px;
  background: linear-gradient(90deg, #0e3a7c, #0b2c5f);
  color: #fff;
}

.logo {
  width: 44px;
  height: 44px;
}

.header h1 {
  margin: 0;
  font-size: 16px;
}

.header p {
  margin: 2px 0 0;
  font-size: 12px;
  opacity: 0.85;
}

/* CHAT AREA */
.chat-box {
  flex: 1;
  padding: 18px;
  overflow-y: auto;
}

/* MESSAGES */
.message {
  max-width: 78%;
  padding: 12px 14px;
  border-radius: 14px;
  margin-bottom: 12px;
  line-height: 1.5;
  font-size: 14px;
}

.bot {
  background: #f1f5f9;
  color: #0f172a;
}

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

/* INPUT */
.input-area {
  display: flex;
  gap: 8px;
  padding: 12px;
  background: #f8fafc;
  border-top: 1px solid #e2e8f0;
}

.input-area input {
  flex: 1;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid #cbd5e1;
  font-size: 14px;
}

.input-area button {
  padding: 0 16px;
  border-radius: 10px;
  border: none;
  background: #2563eb;
  color: #fff;
  font-size: 14px;
  cursor: pointer;
}