body { margin: 0; font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; background: #fafafa; color: #222; display: flex; flex-direction: column; align-items: center; } header { width: 100%; max-width: 900px; } header img { width: 100%; height: auto; display: block; } main { display: flex; align-items: center; gap: 16px; margin: 24px 0; } .nav-button { background: none; border: none; font-size: 2rem; cursor: pointer; padding: 8px 12px; color: #333; } .nav-button:disabled { opacity: 0.3; cursor: default; } .cartoon-container { max-width: 900px; } .cartoon-container img { width: 100%; height: auto; border: 1px solid #ddd; background: white; } footer { margin: 24px 0; font-size: 0.9rem; color: #666; }