/* Global styles */
html, body {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  background: #202124;
  display: flex;
  justify-content: center;
  align-items: center;
  font-family: Arial, sans-serif;
}

/* Calculator styling */
.calculator {
  width: 95vw;
  height: 95vh;
  background: #303134;
  border-radius: 15px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 20px;
  box-sizing: border-box;
}

#display {
  width: 100%;
  height: 15%;
  font-size: 5vw;
  text-align: right;
  background: #202124;
  color: white;
  border: none;
  border-radius: 10px;
  padding: 0 10px;
}

.buttons {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-auto-rows: 1fr;
  gap: 10px;
  flex: 1;
}

button {
  font-size: 3vw;
  border: none;
  border-radius: 10px;
  background: #3c4043;
  color: white;
  cursor: pointer;
}

button:hover {
  background: #5f6368;
}

/* AI Panel styling */
#aiPanel {
  position: fixed;
  right: 10px;
  bottom: 10px;
  width: 500px;
  height: 600px;
  background: linear-gradient(135deg, #1f2937, #111827);
  color: white;
  display: none;
  flex-direction: column;
  padding: 20px;
  border-radius: 15px;
  box-shadow: 0 0 20px rgba(0,0,0,0.7);
  font-family: Arial, sans-serif;
  overflow: hidden;
}

#messages {
  flex: 1;
  overflow-y: auto;
  margin-bottom: 10px;
  padding: 10px;
  border-radius: 10px;
  background: rgba(255,255,255,0.05);
}

.user {
  color: #60a5fa;
  margin-bottom: 10px;
  font-weight: bold;
}

.ai {
  color: #22c55e;
  margin-bottom: 10px;
  font-weight: bold;
}