:root{--primary-color: #2563eb;--secondary-color: #1e40af;--background-color: #f3f4f6;--text-color: #1f2937;--error-color: #ef4444;--success-color: #10b981}body{font-family:Inter,system-ui,-apple-system,sans-serif;background-color:var(--background-color);color:var(--text-color);margin:0;padding:0;line-height:1.5}#app{max-width:600px;margin:0 auto;min-height:100vh;background-color:#fff;box-shadow:0 0 10px rgba(0,0,0,.1);display:flex;flex-direction:column}.container{padding:1rem}button{cursor:pointer;padding:.5rem 1rem;border-radius:.375rem;border:none;font-weight:500;transition:background-color .2s}.btn-primary{background-color:var(--primary-color);color:#fff}.btn-primary:hover{background-color:var(--secondary-color)}.btn-secondary{background-color:#e5e7eb;color:#374151}.btn-secondary:hover{background-color:#d1d5db}.btn-warning{background-color:#f59e0b;color:#fff}.btn-warning:hover{background-color:#d97706}.hidden{display:none!important}input,select,textarea{width:100%;padding:.5rem;margin-top:.25rem;border:1px solid #d1d5db;border-radius:.375rem;box-sizing:border-box}.form-group{margin-bottom:1rem}.error-msg{color:var(--error-color);font-size:.875rem;margin-top:.25rem}