#app{width:100%;height:100vh;margin:0;padding:0}*{margin:0;padding:0;box-sizing:border-box}:root{--primary-color: #3b82f6;--secondary-color: #10b981;--danger-color: #ef4444;--warning-color: #f59e0b;--dark-bg: #1f2937;--light-bg: #f9fafb;--border-color: #e5e7eb;--text-primary: #111827;--text-secondary: #6b7280}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;color:var(--text-primary);background-color:var(--light-bg);line-height:1.6}button{cursor:pointer;border:none;outline:none;font-family:inherit}input,textarea,select{font-family:inherit;outline:none}a{text-decoration:none;color:var(--primary-color)}.btn{padding:.5rem 1rem;border-radius:.375rem;font-weight:500;transition:all .2s}.btn-primary{background-color:var(--primary-color);color:#fff}.btn-primary:hover{background-color:#2563eb}.btn-secondary{background-color:var(--secondary-color);color:#fff}.btn-danger{background-color:var(--danger-color);color:#fff}