:root{--primary:#3b82f6;--primary-hover:#2563eb;--bg:#f8fafc;--surface:#fff;--text:#0f172a;--text-light:#64748b;--border:#e2e8f0;--success:#10b981;--warning:#f59e0b}*{box-sizing:border-box;margin:0;padding:0;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif}body{background-color:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased}button{cursor:pointer;background:0 0;border:none;font-family:inherit}input{font-family:inherit}.card{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:24px;box-shadow:0 4px 6px -1px #0000000d,0 2px 4px -1px #00000008}.btn-primary{background-color:var(--primary);color:#fff;border-radius:8px;padding:10px 16px;font-size:14px;font-weight:600;transition:all .2s}.btn-primary:hover{background-color:var(--primary-hover)}.input-field{border:1px solid var(--border);border-radius:8px;outline:none;width:100%;margin-bottom:16px;padding:12px;font-size:14px;transition:border-color .2s}.input-field:focus{border-color:var(--primary);box-shadow:0 0 0 3px #3b82f61a}