:root {
  --bg-gradient: linear-gradient(135deg, #e8e3dd 0%, #dcd3c9 100%);
  --glass-bg: rgba(255, 253, 249, 0.45);
  --glass-border: rgba(255, 255, 255, 0.65);
  --glass-shadow: 0 20px 40px rgba(90, 78, 65, 0.08);
  --text-main: #4a4238;
  --text-muted: #8c7f70;
  --accent-color: #c3b091;
  --accent-hover: #b3a081;
  --user-msg-bg: #c3b091;
  --bot-msg-bg: rgba(255, 255, 255, 0.75);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, Roboto, sans-serif;
}

body {
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  background: var(--bg-gradient);
  color: var(--text-main);
}

.glass-card {
  width: 380px;
  height: 600px;
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-radius: 28px;
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.header {
  padding: 20px;
  text-align: center;
  background: rgba(255, 255, 255, 0.25);
  border-bottom: 1px solid var(--glass-border);
}

.header h1 {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 1.5px;
  color: var(--text-main);
  text-transform: uppercase;
}

.header p {
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 4px;
}

.chat-box {
  flex: 1;
  padding: 20px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.message {
  max-width: 82%;
  padding: 12px 16px;
  border-radius: 20px;
  font-size: 13.5px;
  line-height: 1.45;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.03);
}

.bot-msg {
  align-self: flex-start;
  background: var(--bot-msg-bg);
  color: var(--text-main);
  border-bottom-left-radius: 4px;
  border: 1px solid rgba(255, 255, 255, 0.8);
}

.user-msg {
  align-self: flex-end;
  background: var(--user-msg-bg);
  color: #ffffff;
  border-bottom-right-radius: 4px;
}

.input-area {
  padding: 16px;
  display: flex;
  gap: 10px;
  background: rgba(255, 255, 255, 0.2);
  border-top: 1px solid var(--glass-border);
}

input {
  flex: 1;
  border: 1px solid var(--glass-border);
  outline: none;
  padding: 12px 18px;
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.85);
  color: var(--text-