:root{--color-bg: #fafafa;--color-surface: #ffffff;--color-text: #1a1a1a;--color-text-muted: #666666;--color-primary: #1a1a1a;--color-primary-hover: #333333;--color-border: #e0e0e0;--color-error: #dc2626;--color-success: #16a34a;--font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--max-width: 640px;--radius: 8px}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-sans);background:var(--color-bg);color:var(--color-text);line-height:1.6;-webkit-font-smoothing:antialiased}.container{max-width:var(--max-width);margin:0 auto;padding:2rem 1.5rem}.card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius);padding:2rem}h1{font-size:1.75rem;font-weight:700;margin-bottom:.5rem}h2{font-size:1.25rem;font-weight:600;margin-bottom:.5rem}label{display:block;font-size:.875rem;font-weight:500;margin-bottom:.25rem;color:var(--color-text)}input,select{width:100%;padding:.75rem 1rem;border:1px solid var(--color-border);border-radius:var(--radius);font-size:1rem;font-family:var(--font-sans);transition:border-color .15s}input:focus,select:focus{outline:none;border-color:var(--color-primary);box-shadow:0 0 0 3px #0000000d}input.error{border-color:var(--color-error)}.field{margin-bottom:1.25rem}.field-error{color:var(--color-error);font-size:.8rem;margin-top:.25rem}.field-row{display:grid;grid-template-columns:1fr 1fr;gap:1rem}button{display:inline-flex;align-items:center;justify-content:center;padding:.75rem 1.5rem;font-size:1rem;font-weight:600;font-family:var(--font-sans);border:none;border-radius:var(--radius);cursor:pointer;transition:background .15s}.btn-primary{background:var(--color-primary);color:#fff;width:100%}.btn-primary:hover{background:var(--color-primary-hover)}.btn-primary:disabled{opacity:.5;cursor:not-allowed}.alert{padding:.75rem 1rem;border-radius:var(--radius);font-size:.9rem;margin-bottom:1rem}.alert-error{background:#fef2f2;color:var(--color-error);border:1px solid #fecaca}.alert-success{background:#f0fdf4;color:var(--color-success);border:1px solid #bbf7d0}.steps{display:flex;gap:.5rem;margin-bottom:2rem}.step{flex:1;height:4px;border-radius:2px;background:var(--color-border)}.step.active{background:var(--color-primary)}footer{text-align:center;padding:2rem 0;font-size:.8rem;color:var(--color-text-muted)}footer a{color:var(--color-text-muted)}