body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  background: #050814;
  color: #f5f5f5;
}

header {
  padding: 1.5rem;
  border-bottom: 1px solid #222;
  text-align: center;
}

.logo { font-weight: 600; font-size: 1.2rem; }
.tagline { font-size: 0.95rem; color: #9fb3ff; margin-top: 0.25rem; }

.marcus-panel {
  max-width: 960px;
  margin: 2rem auto;
  padding: 1.5rem;
  display: flex;
  gap: 1.5rem;
}

.marcus-avatar {
  width: 220px;
  background: #0b1020;
  border-radius: 12px;
  padding: 1rem;
  border: 1px solid #222;
}

.battery {
  width: 60px;
  height: 18px;
  border-radius: 4px;
  margin-bottom: 1rem;
}

.battery-green { background: #2ecc71; }
.battery-yellow { background: #f1c40f; }
.battery-red { background: #e74c3c; }
.battery-blue { background: #3498db; }

.kangaroo {
  width: 100%;
  height: 140px;
  background: radial-gradient(circle at 30% 20%, #4aa3ff, #0b1020);
  border-radius: 10px;
}

.marcus-chat {
  flex: 1;
  background: #0b1020;
  border-radius: 12px;
  padding: 1rem;
  border: 1px solid #222;
}

.output {
  min-height: 160px;
  max-height: 320px;
  overflow-y: auto;
  padding: 0.5rem;
  border-radius: 8px;
  background: #050814;
  border: 1px solid #222;
  margin-bottom: 1rem;
}

#marcus-form {
  display: flex;
  gap: 0.5rem;
}

#marcus-input {
  flex: 1;
  padding: 0.6rem 0.8rem;
  border-radius: 6px;
  border: 1px solid #333;
  background: #050814;
  color: #f5f5f5;
}

#marcus-input:focus {
  outline: none;
  border-color: #4aa3ff;
}

button {
  padding: 0.6rem 1rem;
  border-radius: 6px;
  border: none;
  background: #4aa3ff;
  color: #050814;
  font-weight: 600;
  cursor: pointer;
}

button:hover {
  background: #6bb4ff;
}

footer {
  text-align: center;
  padding: 1.5rem;
  font-size: 0.85rem;
  color: #888;
  border-top: 1px solid #222;
}